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Schrijver I, Houissa-Kastally R, Jones CD, Garcia KC, Zehnder JL. Novel factor V C2-domain mutation (R2074H) in two families with factor V deficiency and bleeding. Thromb Haemost 2002; 87:294-9. [PMID: 11858490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The molecular basis of Factor V deficiency has been defined in few patients only. We report a homozygous nucleotide change (G6395A) in two Tunisian probands with Factor V deficiency and bleeding episodes. This substitution results in the replacement of an arginine (R) by a histidine (H) in amino acid position 2074, located in the Factor V C2-domain. Mutations in this protein domain have not previously been described. Several lines of evidence support that this sequence variant is indeed disease causing: 1) Crystal structures of Factor V and molecular C2-domain modeling studies of H2074 suggest that the conserved R2074 is required for correct folding; 2) Structure-function studies of selective Factor V mutants (R2074A) demonstrate the importance of R2074 for structural stability of the Factor V C2-domain and for cofactor activity (1); 3) In Factor VIII, point mutations in codon 2209, which corresponds to position 2074 in Factor V, cause hemophilia A.
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Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z. Search for charmless B --> VV decays. PHYSICAL REVIEW LETTERS 2002; 88:021802. [PMID: 11801004 DOI: 10.1103/physrevlett.88.021802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2001] [Indexed: 05/23/2023]
Abstract
We have studied two-body charmless decays of the B meson into the final states rho(0)rho(0), K(*0)rho(0), K(*0)K(*0), K(*0)K(*0), K(*+)rho(0), K(*+)K(*0), and K(*+)K(*-) using only decay modes with charged daughter particles. Using 9.7x10(6) BB pairs collected with the CLEO detector, we place 90% confidence level upper limits on the branching fractions (1.4-14.1)x10(-5), depending on final state and polarization.
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Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ. Search for the familon via B(+/-) --> pi+/-X(0), B(+/-) --> K(+/-)X(0), and B(0) --> K(0)(S)X(0) decays. PHYSICAL REVIEW LETTERS 2001; 87:271801. [PMID: 11800872 DOI: 10.1103/physrevlett.87.271801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2001] [Indexed: 05/23/2023]
Abstract
We have searched for the two-body decay of the B meson to a light pseudoscalar meson h = pi(+/-),K+/-,K(0)(S) and a massless neutral feebly interacting particle X(0) such as the familon, the Nambu-Goldstone boson associated with a spontaneously broken global family symmetry. We find no significant signal by analyzing a data sample containing 9.7x10(6) BBbar mesons collected with the CLEO detector at the Cornell Electron Storage Ring, and set 90% C.L. upper limits italicB(B(+/-) --> h(+/-)X(0)) = 4.9x10(-5) and italicB(B(0) --> K(0)(S)X(0)) = 5.3x10(-5). These limits correspond to a lower bound of approximately 10(8) GeV on the family symmetry breaking scale with vector coupling involving the third generation of quarks.
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Cronin-Hennessy D, Lyon AL, Roberts S, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP. Hadronic mass moments in inclusive semileptonic B meson decays. PHYSICAL REVIEW LETTERS 2001; 87:251808. [PMID: 11736567 DOI: 10.1103/physrevlett.87.251808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the first and second moments of the hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. We find <M(2)(X)-M macro(2)(D)> = 0.251+/-0.066 GeV(2), <(M(2)(X)-<M(2)(X)>)(2)> = 0.576+/-0.170 GeV(4), where M macro(D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b-->s gamma, we find the heavy quark effective theory parameter lambda(1) (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) to be -0.24+/-0.11 GeV(2). Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain absolute value of V(cb) = 0.0404+/-0.0013.
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Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V. Branching fraction and photon energy spectrum for b --> s gamma. PHYSICAL REVIEW LETTERS 2001; 87:251807. [PMID: 11736566 DOI: 10.1103/physrevlett.87.251807] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the branching fraction and photon energy spectrum for the radiative penguin process b-->s gamma. We find Beta(b-->s gamma) = (3.21+/-0.43+/-0.27(+0.18)(-0.10))x10(-4), where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, <E( gamma)> = 2.346+/-0.032+/-0.011 GeV, and <E(2)(gamma)>-<E(gamma)>(2) = 0.0226+/-0.0066+/-0.0020 GeV(2), where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) the heavy quark effective theory parameter Lambda = 0.35+/-0.08+/-0.10 GeV.
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Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, Jain V, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J. First measurement of gamma(D*(+)). PHYSICAL REVIEW LETTERS 2001; 87:251801. [PMID: 11736560 DOI: 10.1103/physrevlett.87.251801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2001] [Indexed: 05/23/2023]
Abstract
We present the first measurement of the D*(+) width using 9/fb of e(+)e(-) data collected near the Upsilon(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*(+)-->D(0)pi(+) decay. We find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. We also measure the energy release in the decay and compute Delta m identical with m(D*(+))-m(D(0)) = 145.412+/-0.002 (stat)+/-0.012 (syst) MeV/c(2).
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Jones CD. The genetic basis of larval resistance to a host plant toxin in Drosophila sechellia. Genet Res (Camb) 2001; 78:225-33. [PMID: 11865712 DOI: 10.1017/s0016672301005298] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The larvae of Drosophila sechellia are highly resistant to octanoic acid, a toxin found in D. sechellia's host plant, Morinda citrifolia. In contrast, close relatives of D. sechellia, D. simulans and D. melanogaster, are not resistant. In a series of interspecific backcrosses, 11 genetic markers were used to map factors affecting egg-to-adult ('larval') resistance in D. sechellia. The third chromosome harbours at least one partially dominant resistance factor. The second chromosome carries at least two mostly dominant resistance factors but no recessive factors. However, neither the X chromosome--which contains 20% of D. sechellia's genome--nor the fourth chromosome appear to affect resistance. These data suggest that larval resistance to Morinda toxin may involve only a handful of genes. These results, when compared with a previous analysis of adult resistance to Morinda toxin in D. sechellia, suggest that larval resistance may involve a subset of the genes underlying adult resistance.
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Katzberg RW, Buonocore MH, Ivanovic M, Pellot-Barakat C, Ryan JM, Whang K, Brock JM, Jones CD. Functional, dynamic, and anatomic MR urography: feasibility and preliminary findings. Acad Radiol 2001; 8:1083-99. [PMID: 11721808 DOI: 10.1016/s1076-6332(03)80720-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
RATIONALE AND OBJECTIVES The authors assessed the feasibility of using magnetic resonance (MR) urography to acquire functional, dynamic, and anatomic information in human subjects with normal and hydronephrotic kidneys. MATERIALS AND METHODS In subjects known to have or suspected of having hydronephrosis, split renal filtration fractions were measured with a customized magnetization-prepared, inversion-prepared gradient-recalled echo sequence to determine the T1 of flowing blood in the inferior vena cava and aorta before and after contrast medium administration and in the renal veins and arteries after contrast medium administration. Multiple timed sets of coronal fast spoiled gradient-echo 70 degrees flip-angle images were acquired before and after contrast medium administration to derive MR renograms from changes in the signal intensity of the cortex and medulla. Precontrast T2-weighted images were obtained with a three-dimensional fast spoiled gradient-echo maximum intensity projection pulse sequence, and postcontrast T1 maximum intensity projection images were also obtained to depict the renal anatomy. RESULTS Split filtration fraction differentiated normal from hydronephrotic kidneys. MR renograms depicted vascular, tubular, and ductal phases and differentiated between normal and hydronephrotic kidneys (P < .05, n = 20). Contrast medium dose correlated with the peak of the cortical signal intensity curves on the renogram (r = 0.7, P < .0005; n = 20). The sensitivities for the visual determination of hydronephrosis and unilateral delayed excretion of contrast material were both 100%, and the specificities were 64% and 85%, respectively. CONCLUSION The preliminary findings show promise for the use of MR urography in the comprehensive assessment of renal function, dynamics, and anatomy.
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Lossos IS, Jones CD, Zehnder JL, Levy R. A polymorphism in the BCL-6 gene is associated with follicle center lymphoma. Leuk Lymphoma 2001; 42:1343-50. [PMID: 11911418 DOI: 10.3109/10428190109097762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Follicle center lymphoma (FCL) accounts for approximately 40% of all non-Hodgkin's lymphomas (NHL). The genetic-environmental interactions involved in the etiology and pathogenesis of this disease are unknown. In our previous study a single nucleotide polymorphism (SNP) (397C) in the regulatory untranslated first intron region of the BCL-6 gene was found in four of the eight FCL patients but in none of the 10 healthy controls. To further evaluate the potential association between the 397C allele of the BCL-6 gene and FCL, we performed a case-control study. Genomic DNA was isolated from 85 FCL patients, from 98 control cases without a previous history of malignancy, treated at Stanford University Medical Center for non-malignant disorders and from 90 samples from the DNA Polymorphism Discovery Resource. The 397G and the 397C polymorphic alleles were identified by a PCR-RFLP method. To evaluate the possible effect of this polymorphism on gene expression, BCL-6 mRNA levels in nine FCL tumors with the 397G-G genotype and in nine FCL tumors with the 397G-C genotype were measured by quantitative real-time RT-PCR. The 397C polymorphic allele was found in 32 FCL cases (37.6%), in 20 controls (20.4%) and in 17 (18.9%) samples from the DNA Polymorphism Discovery Resource. The prevalence of the 397G-C and 397C-C genotypes was significantly higher in FCL cases than in control group (p = 0.01). No difference in BCL-6 gene expression was observed between FCL cases with 397G-G and 397G-C genotypes. The present study demonstrates a possible association between the 397C allele of the BCL-6 proto-oncogene and FCL. The similar levels of BCL-6 mRNA expression in 397G-G and in 397G-C FCL cases suggests that any possible oncogenic effect of the polymorphic allele would not simply be related to a direct effect on BCL-6 gene expression and suggests the existence of other FCL susceptibility genes that are in linkage disequilibrium with the 397C allele of the BCL-6 gene.
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Abstract
Spectral stimuli form a physical continuum, which humans divide into discrete non-overlapping regions or categories that are designated by colour names. Little is known about whether non-verbal animals form categories on stimulus continua, but work in psychology and artificial intelligence provides models for stimulus generalization and categorization. We compare predictions of such models to the way poultry chicks (Gallus gallus) generalize to novel stimuli following appetitive training to either one or two colours. If the two training colours are (to human eyes) red and greenish-yellow or green and blue, chicks prefer intermediates, i.e. orange rather than red or yellow and turquoise rather than green or blue. The level of preference for intermediate colours implies that the chicks interpolate between the training stimuli. However, they do not extrapolate beyond the limits set by the training stimuli, at least for red and yellow training colours. Similarly, chicks trained to red and blue generalize to purple, but they do not generalize across grey after training to the complementary colours yellow and blue. These results are consistent with a modified version of a Bayesian model of generalization from multiple examples that was proposed by Shepard and show similarities to human colour categorization.
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Richichi SJ, Severini H, Skubic P, Dytman SA, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Zhao H, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Prescott C, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Karliner I, Lowrey NA, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM. Search for the decay upsilon(1S) --> gammaeta('). PHYSICAL REVIEW LETTERS 2001; 87:141801. [PMID: 11580641 DOI: 10.1103/physrevlett.87.141801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2001] [Indexed: 05/23/2023]
Abstract
We report on a search for the radiative decay Upsilon(1S)-->gammaeta(') in 61.3 pb(-1) of data taken with the CLEO II detector at the Cornell Electron Storage Ring. Three decay chains were investigated, all involving eta(')-->pi(+)pi(-)eta, followed by eta-->gammagamma, eta-->pi(0)pi(0)pi(0), or eta-->pi(+)pi(-)pi(0). We find no candidate events in any of the three cases and set a combined upper limit of 1.6x10(-5) at 90% C.L., significantly smaller than the previous limit. We compare our result to other radiative Upsilon decays, to radiative J/psi decays, and to theoretical predictions.
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Lossos IS, Jones CD, Warnke R, Natkunam Y, Kaizer H, Zehnder JL, Tibshirani R, Levy R. Expression of a single gene, BCL-6, strongly predicts survival in patients with diffuse large B-cell lymphoma. Blood 2001; 98:945-51. [PMID: 11493437 DOI: 10.1182/blood.v98.4.945] [Citation(s) in RCA: 229] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diffuse large B-cell lymphoma (DLBCL) is characterized by a marked degree of morphologic and clinical heterogeneity. Establishment of parameters that can predict outcome could help to identify patients who may benefit from risk-adjusted therapies. BCL-6 is a proto-oncogene commonly implicated in DLBCL pathogenesis. A real-time reverse transcription-polymerase chain reaction assay was established for accurate and reproducible determination of BCL-6 mRNA expression. The method was applied to evaluate the prognostic significance of BCL-6 expression in DLBCL. BCL-6 mRNA expression was assessed in tumor specimens obtained at the time of diagnosis from 22 patients with primary DLBCL. All patients were subsequently treated with anthracycline-based chemotherapy regimens. These patients could be divided into 2 DLBCL subgroups, one with high BCL-6 gene expression whose median overall survival (OS) time was 171 months and the other with low BCL-6 gene expression whose median OS was 24 months (P =.007). BCL-6 gene expression also predicted OS in an independent validation set of 39 patients with primary DLBCL (P =.01). BCL-6 protein expression, assessed by immunohistochemistry, also predicted longer OS in patients with DLBCL. BCL-6 gene expression was an independent survival predicting factor in multivariate analysis together with the elements of the International Prognostic Index (IPI) (P =.038). By contrast, the aggregate IPI score did not add further prognostic information to the patients' stratification by BCL-6 gene expression. High BCL-6 mRNA expression should be considered a new favorable prognostic factor in DLBCL and should be used in the stratification and the design of risk-adjusted therapies for patients with DLBCL. (Blood. 2001;98:945-951)
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Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J. Rate measurement of D(0)-->K+pi(-)pi(0) and constraints on D(0) -- D(0) mixing. PHYSICAL REVIEW LETTERS 2001; 87:071802. [PMID: 11497880 DOI: 10.1103/physrevlett.87.071802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2001] [Indexed: 05/23/2023]
Abstract
We present an observation and time-integrated rate measurement of the decay D(0)-->K(+)pi(-)pi(0) produced in 9 fb(-1) of e(+)e(-) collisions near the Upsilon(4S) resonance. The signal is inconsistent with an upward fluctuation of the background by 4.9 standard deviations. We measured the time-integrated rate of D(0)-->K(+)pi(-)pi(0) normalized to the rate of D(0)-->K(+)pi(-)pi(0) to be 0.0043(+0.0011)(-0.0010) (stat)+/-0.0007 (syst). This decay can be produced by doubly Cabibbo-suppressed decays or by the D(0) evolving into a D(0) through mixing, followed by a Cabibbo-favored decay to K(+)pi(-)pi(0). We also found the CP asymmetry A = (9(+25)(-22))% be consistent with zero.
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Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R. Experimental investigation of the two-photon widths of the chi(c0) and the chi(c2) mesons. PHYSICAL REVIEW LETTERS 2001; 87:061801. [PMID: 11497821 DOI: 10.1103/physrevlett.87.061801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2001] [Indexed: 05/23/2023]
Abstract
Using 12.7 fb(-1) of data collected with the CLEO detector at CESR, we observed two-photon production of the cc states chi(c0) and chi(c2) in their decay to pi(+)pi(-)pi(+)pi(-). We measured gamma(gammagamma)(chi(c))xB(chi(c)-->pi(+)pi(-)pi(+)pi(-)) to be 75+/-13(stat)+/-8(syst) eV for the chi(c0) and 6.4+/-1.8(stat)+/-0.8(syst) eV for the chi(c2), implying gamma(gammagamma)(chi(c0)) = 3.76+/-0.65(stat)+/-0.41(syst)+/-1.69(br) keV and gamma(gammagamma)(chi(c2)) = 0.53+/-0.15(stat)+/-0.06(syst)+/-0.22(br) keV. Also, cancellation of dominant experimental and theoretical uncertainties permits a precise comparison of gamma(gammagamma)(chi(c0))/gamma(gammagamma)(chi(c2)), evaluated to be 7.4+/-2.4(stat)+/-0.5(syst)+/-0.9(br), with QCD-based predictions.
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Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Jessop CP, Savinov V. Bounds on the CP asymmetry in b --> sgamma decays. PHYSICAL REVIEW LETTERS 2001; 86:5661-5665. [PMID: 11415327 DOI: 10.1103/physrevlett.86.5661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2000] [Indexed: 05/23/2023]
Abstract
We have measured the CP asymmetry A(CP) identical with[gamma(b-->sgamma)-gammab-->sgamma)]/[gamma(b-->sgamma)+gamma(b-->sgamma)] to be A(CP) = (-0.079+/-0.108+/-0.022) (1.0+/-0.030), implying that, at 90% confidence level, A(CP) lies between -0.27 and +0.10. These limits rule out some extreme non-standard-model predictions, but are consistent with most, as well as with the standard model.
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Gerscovich EO, Cronan M, McGahan JP, Jain K, Jones CD, McDonald C. Ultrasonographic evaluation of diaphragmatic motion. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2001; 20:597-604. [PMID: 11400933 DOI: 10.7863/jum.2001.20.6.597] [Citation(s) in RCA: 211] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
OBJECTIVE To evaluate the technical feasibility and utility of ultrasonography in the study of diaphragmatic motion at our institution. METHODS The study consisted of 2 parts. For part I, in 23 volunteers we performed 23 studies on 46 hemidiaphragms with excursions documented on M-mode ultrasonography For part II, in 22 patients we performed 52 studies in 102 hemidiaphragms. In 50 studies both hemidiaphragms were studied, and in another 2 studies only 1 hemidiaphragm was studied. Patients' ages ranged from birth to 66 years (mean, 23 years). There were 16 male and 6 female patients. Indications for the study were (1) suggestion of paralysis of the diaphragm (n = 22); (2) if the diaphragm was already known to be paralyzed, for evaluation of response to phrenic nerve or pacer stimulation (n = 9); and (3) follow-up of previous findings (n = 21). Patients were examined in the supine position in the longitudinal semicoronal plane from a subcostal or low intercostal approach. Motion was documented with real-time ultrasonography and measured with M-mode ultrasonography. RESULTS Of the 102 clinical hemidiaphragms studied, findings included normal motion (n = 42), decreased motion (n = 22), no motion (n = 6), paradoxical motion (n = 10), positive pacer response (n = 13), negative pacer response (n = 2), positive phrenic stimulation (n = 6), and negative phrenic stimulation (n = 1). There were no failures of visualization. CONCLUSIONS Ultrasonography proved feasible and useful in evaluating diaphragmatic motion. In our practice it has replaced fluoroscopy. Ultrasonography has advantages over traditional fluoroscopy, including portability, lack of ionizing radiation, visualization of structures of the thoracic bases and upper abdomen, and the ability to quantify diaphragmatic motion.
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Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ. Bounds on the CP asymmetry in like-sign dileptons from B(0)B*(0) meson decays. PHYSICAL REVIEW LETTERS 2001; 86:5000-5003. [PMID: 11384405 DOI: 10.1103/physrevlett.86.5000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2001] [Indexed: 05/23/2023]
Abstract
We have measured the charge asymmetry in like-sign dilepton yields from B(0)B*(0) meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a(0)(ll) identical with[N(l(+)l(+))-N(l(-)l(-))]/[N(l(+)l(+))+N(l(-)l(-))] = +0.013+/-0.050+/-0.005. We combine this result with a previous, independent measurement and obtain Re(epsilon(B))/(1+ the absolute value of epsilon(B)(2)) = +0.0035+/-0.0103+/-0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon(B).
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Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Savinov V, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F. Study of tau decays to six pions and a neutrino. PHYSICAL REVIEW LETTERS 2001; 86:4467-4471. [PMID: 11384261 DOI: 10.1103/physrevlett.86.4467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2000] [Indexed: 05/23/2023]
Abstract
The tau decays to six-pion final states have been studied with the CLEO detector at the Cornell Electron Storage Ring. The measured branching fractions are B(tau(-)-->2pi(-)pi(+)3pi(0)nu(tau)) = (2.2+/-0.3+/-0.4)x10(-4) and B(tau(-)-->3pi(-)2pi(+)pi(0)nu(tau)) = (1.7+/-0.2+/-0.2)x10(-4). A search for substructure in these decays shows that they are saturated by intermediate states with eta or omega mesons. We present the first observation of the decay tau(-)-->2pi(-)pi(+)omega(nu)tau and the branching fraction is measured to be (1.2+/-0.2+/-0.1)x10(-4). The measured branching fractions are in good agreement with the isospin expectations but somewhat below the conserved-vector-current predictions.
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Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Savinov V, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T. Observation of new states decaying into Lambda+(c)pi(-)pi(+). PHYSICAL REVIEW LETTERS 2001; 86:4479-4482. [PMID: 11384263 DOI: 10.1103/physrevlett.86.4479] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2000] [Indexed: 05/23/2023]
Abstract
Using 13.7 fb(-1) of data recorded by the CLEO detector at the Cornell Electron Storage Ring, we investigate the spectrum of charmed baryons which decay into Lambda+(c)pi(-)pi(+) and are more massive than the Lambda+(c)(2625) baryon. We find evidence for two new states: one is broad and has an invariant mass roughly 480 MeV above that of the Lambda+(c) baryon; the other is narrow with an invariant mass of 596+/-1+/-2 MeV above the Lambda+(c) mass.
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Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH. Evidence of New States Decaying into Xi(*)(c)pi. PHYSICAL REVIEW LETTERS 2001; 86:4243-4246. [PMID: 11328145 DOI: 10.1103/physrevlett.86.4243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2000] [Indexed: 05/23/2023]
Abstract
Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi(0')(c)pi(+) with the subsequent decay Xi(0')(c)-->Xi(0)(c)gamma, and its isospin partner decaying into Xi(+')(c)pi(-) followed by Xi(+')(c)-->Xi(+)(c)gamma. We measure the following mass differences for the two states: M(Xi(0)(c)gammapi(+))-M(Xi(0)(c)) = 318.2+/-1.3+/-2.9 MeV and M(Xi(+)(c)gammapi(-))-M(Xi(+)(c)) = 324.0+/-1.3+/-3.0 MeV. We interpret these new states as the J(P) = 1 / 2(-) Xi(c1) particles, the charmed-strange analogs of the Lambda(+)(c1)(2593).
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Jones CD. Extension of the Castle-Wright effective factor estimator to sex linkage and haplodiploidy. J Hered 2001; 92:274-6. [PMID: 11447245 DOI: 10.1093/jhered/92.3.274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Castle-Wright effective factor estimator gives a minimum estimate of the number of genes underlying complex traits. Because the Castle-Wright estimator does not rely on genetic markers, it is especially useful in genetically undeveloped species. In this article I describe two extensions of this estimator. The first corrects the estimator in heterogametic (XY) species with a partially sex-linked trait. In this case the traditional estimator underestimates gene number in F2 males and overestimates it in F2 females and backcross females and males. The second extension adapts the Castle-Wright equation to haplodiploid species.
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Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ. Observation of B --> phiK and B --> phiK*. PHYSICAL REVIEW LETTERS 2001; 86:3718-3721. [PMID: 11329307 DOI: 10.1103/physrevlett.86.3718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2001] [Indexed: 05/23/2023]
Abstract
We have studied two-body charmless hadronic decays of B mesons into the final states straight phiK and phiK(*). Using 9.7 million B&Bmacr; pairs collected with the CLEO II detector, we observe the decays B- --> phiK- and B0--> phiK(*0) with the following branching fractions: B(B--->phiK-) = (5.5(+2.1)(-1.8)+/-0.6)x10(-6) and B(B0--> phiK(*0)) = (11.5(+4.5+1.8)(-3.7-1.7))x10(-6). We also see evidence for the decays B0-->phiK0 and B---> phiK(*-). However, since the statistical significance is not overwhelming for these modes, we determine upper limits of <12.3x10(-6) and <22.5x10(-6) ( 90% confidence level), respectively.
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Cronin-Hennessy D, Lyon AL, Thorndike EH, Savinov V, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V. Observation of the Omega(0)(c) Charmed Baryon at CLEO. PHYSICAL REVIEW LETTERS 2001; 86:3730-3734. [PMID: 11329310 DOI: 10.1103/physrevlett.86.3730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2000] [Indexed: 05/23/2023]
Abstract
The CLEO experiment at the CESR collider has used 13.7 fb(-1) of data to search for the production of the Omega(0)(c) (css ground state) in e(+)e(-) collisions at square root of (s) approximately 10.6 GeV. The modes used to study the Omega(0)(c) are Omega(-)pi(+), Omega(-)pi(+)pi(0), Xi-K-pi(+)pi(+), Xi0K-pi(+), and Omega(-)pi(+)pi(+)pi(-). We observe a signal of 40.4+/-9.0(stat) events at a mass of 2694.6+/-2.6(stat)+/-1.9(syst) MeV/c(2), for all modes combined.
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Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Ferguson T, Vogel H, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R. Search for B --> tau(nu) and B --> K(nu)nu. PHYSICAL REVIEW LETTERS 2001; 86:2950-2954. [PMID: 11290080 DOI: 10.1103/physrevlett.86.2950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2000] [Indexed: 05/23/2023]
Abstract
We report results of a search for B-->tau(nu) in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B-->tau(nu))<8.4 x 10(-4) at 90% confidence level. We also establish B(B+/--->K+/-nu(nu))<2.4 x 10(-4) at 90% confidence level.
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Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Mahmood AH, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Menon N, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Kwon Y, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG. Measurement of the relative branching fraction of upsilon(4S) to charged and neutral B-meson pairs. PHYSICAL REVIEW LETTERS 2001; 86:2737-2741. [PMID: 11290027 DOI: 10.1103/physrevlett.86.2737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2000] [Indexed: 05/23/2023]
Abstract
We analyze 9.7x10(6) B_B pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Upsilon(4S) resonance. We measure the rates for B0-->J/psiK((*)0) and B+-->J/psiK((*)+) decays and use the world-average B-meson lifetime ratio to extract the relative widths f(+-) / f(00) = gamma(Upsilon(4S)-->B+B-) / gamma(Upsilon(4S)-->B0 B-0)) = 1.04+/-0.07(stat)+/-0.04(syst). With the assumption that f(+-)+f(00) = 1, we obtain f(00) = 0.49+/-0.02(stat)+/-0.01(syst) and f(+-) = 0.51+/-0.02(stat)+/-0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Upsilon(4S) resonance.
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Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X. First observation of the decays B(0) --> D(*-)p_p pi+ and B(0) --> D(*-)p_n. PHYSICAL REVIEW LETTERS 2001; 86:2732-2736. [PMID: 11290026 DOI: 10.1103/physrevlett.86.2732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2000] [Indexed: 05/23/2023]
Abstract
We report the first observation of exclusive decays of the type B-->D(*)N_NX, where N is a nucleon. Using a sample of 9.7x10(6)B_B pairs collected with the CLEO detector operating at the Cornell Electron Storage Ring, we measure the branching fractions B(B0-->D(*-)p_p pi(+)) = (6.5(+1.3)(-1.2)+/-1.0)x10(-4) and B(B0-->D(*-)p_n) = (14.5(+3.4)(-3.0)+/-2.7)x10(-4). Antineutrons are identified by their annihilation in the CsI electromagnetic calorimeter.
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Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S. Measurement of the lambda(+)(c) lifetime. PHYSICAL REVIEW LETTERS 2001; 86:2232-2236. [PMID: 11289897 DOI: 10.1103/physrevlett.86.2232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2000] [Indexed: 05/23/2023]
Abstract
The Lambda+c lifetime is measured using 9.0 fb(-1) of e+e- annihilation data collected on or just below the Upsilon(4S) resonance with the CLEO II.V detector at CESR. Using an unbinned maximum likelihood fit, the Lambda+c lifetime is measured to be 179.6+/-6.9(stat)+/-4.4(syst) fs. The precision of this colliding beam measurement is comparable to other measurements, which are based on fixed-target experiments, with different systematic uncertainties.
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Abstract
The purpose of this study was to determine the sensitivity of emergency ultrasound (US) for the detection of blunt splenic injury (BSI), and to describe sonographic parenchymal patterns. Over 3 years, 2138 emergency US were performed, and 162 patients had BSI. CT was performed for 76 patients, and there were 86 laparotomies. Seventy patients (43%) had concomitant intraabdominal injuries. Ultrasound detected free fluid in 109 patients (67%), and parenchymal injury in 31 patients (19%). There were 48 false negative US (30%). Sonographic patterns included a diffuse heterogeneous appearance, hyperechoic and hypoechoic perisplenic crescents, and discrete hypoechoic or hyperechoic areas within the spleen. Overall sensitivity of US for detection of BSI was 69%, but was 86% for grade III or higher injuries. Ultrasound is most sensitive for the detection of grade III or higher BSI based on the presence of haemoperitoneum. Ultrasound may also identify BSI on the basis of parenchymal abnormality, with a diffuse heterogeneous pattern most commonly encountered. Sonographic evaluation for both free fluid and parenchymal injury improves sensitivity of US.
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Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ. First observation of the sigma(*+)(c) baryon and a new measurement of the sigma(*+)(c) mass. PHYSICAL REVIEW LETTERS 2001; 86:1167-1170. [PMID: 11178035 DOI: 10.1103/physrevlett.86.1167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2000] [Indexed: 05/23/2023]
Abstract
Using data recorded with the CLEO II and CLEO II.V detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the Sigma(*+)(c) charmed baryon, and an updated measurement of the mass of the Sigma(+)(c) baryon. We find M(Sigma(*+)(c))-M(Lambda(+)(c)) = (231.0+/-1.1+/-2.0) MeV, and M(Sigma(+)(c))-M(Lambda(+)(c)) = (166.4+/-0.2+/-0.3) MeV, where the errors are statistical and systematic, respectively.
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Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J. Study of B Decays to Charmonium States: B-->eta(c)K and B --> chi(c0)K. PHYSICAL REVIEW LETTERS 2001; 86:30-34. [PMID: 11136086 DOI: 10.1103/physrevlett.86.30] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2000] [Indexed: 05/23/2023]
Abstract
In a sample of 9.66x10(6)B&Bmacr; pairs collected with the CLEO detector we make the first observation of B decays to an eta(c) and a kaon. We measure branching fractions B(B+-->eta(c)K+) = (0.69(+0.26)(-0.21)+/-0.08+/-0.20)x10(-3) and B(B degrees -->eta(c)K degrees ) = (1.09(+0.55)(-0.42)+/-0.12+/-0.31)x10(-3), where the first error is statistical, the second is systematic, and the third is from the eta(c) branching fraction uncertainty. From these we extract the eta(c) decay constant in the factorization approximation, f(eta(c)) = 335+/-75 MeV. We also search for B decays to a chi(c0) and a kaon. No evidence for a signal is found and we set 90% C.L. upper limits: B(B+-->chi(c0)K+)<4.8x10(-4) and B(B degrees -->chi(c0)K degrees )<5.0x10(-4).
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Ranheim EA, Jones CD, Zehnder JL. Sensitive detection of clonal immunoglobulin rearrangements in frozen and paraffin embedded tissues by polymerase chain reaction heteroduplex analysis. DIAGNOSTIC MOLECULAR PATHOLOGY : THE AMERICAN JOURNAL OF SURGICAL PATHOLOGY, PART B 2000; 9:177-83. [PMID: 11129440 DOI: 10.1097/00019606-200012000-00001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Molecular detection of a clonal population of B or T cells through analysis of rearranged antigen receptor genes is an essential adjunct to the morphologic, flow cytometric, and immunohistochemical evaluation of tissue specimens for the presence of leukemia or lymphoma. Combining polymerase chain reaction (PCR) with heteroduplex annealing and polyacrylamide gel electrophoresis (PAGE) has been used to detect clonal T-cell receptor rearrangements, particularly in skin biopsy specimens. The authors have developed a similar PCR heteroduplex assay for detection of clonal VDJ immunoglobulin gene rearrangements using two sets of primers based on relatively conserved consensus regions in the J(H) and framework I and 2 regions of the immunoglobulin heavy chain V region gene. This method is able to detect a clonal rearrangement when the clone comprises as little as 1% of the population in a polyclonal B-cell background. It may be used on fresh, frozen, or paraffin-embedded tissue and detects a clonal population in a majority of lymphoma subtypes. Compared with conventional PCR analysis, this method requires only a short additional cycle of denaturation and slow renaturation before PAGE. Interpretation is simplified as the clonal PCR product migrates away from the polyclonal background products.
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Harvell JD, Fulton R, Jones CD, Terris DJ, Warnke RA. Composite dendritic cell neoplasm (NOS) and small lymphocytic lymphoma. Appl Immunohistochem Mol Morphol 2000; 8:322-8. [PMID: 11127925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
This report describes a composite (or "collision") of a dendritic cell neoplasm and small lymphocytic lymphoma. It represents the seventh example of dendritic cell neoplasia occurring in the setting of low-grade B-cell malignancy and the third example of a composite tumor, in which both neoplasms were present within the same lymph node. The small lymphocytic lymphoma component exhibited a typical CD20+, CD5+, and CD23+ immunophenotype. The dendritic cell neoplasm exhibited reactivity with CNA-42, but nonreactivity for CD21, CD35, smooth muscle actin, desmin, and epithelial membrane antigen (EMA). Equivocal cytoplasmic staining was seen for S100p, CD68, and Factor XIIIa. Ultrastructurally, the dendritic cell neoplasm exhibited desmosomes, rough endoplasmic reticulum, cytoplasmic intermediate filaments, and intercellular collagen. Because the immunophenotype and ultrastructure did not correspond to one of the five recognizable dendritic cell subtypes, the neoplasm was designated dendritic cell neoplasm, not otherwise specified (NOS). Polymerase chain reaction (PCR) analysis for immunoglobulin heavy chain gene rearrangements performed on individual components of the composite tumor demonstrated rearrangement within the small lymphocytic lymphoma component, but none in the dendritic cell component. The lack of an immunoglobulin heavy chain gene rearrangement within the dendritic cell component argues against a transformational event and supports the concept that these separate neoplasms represent a true "collision" or composite lesion.
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MESH Headings
- Aged
- Dendritic Cells/pathology
- Dendritic Cells/ultrastructure
- Genes, Immunoglobulin/genetics
- Humans
- Immunohistochemistry
- Immunophenotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Lymph Nodes/metabolism
- Male
- Neoplasms/diagnosis
- Neoplasms/genetics
- Neoplasms/metabolism
- Polymerase Chain Reaction
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183
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Otto SP, Jones CD. Detecting the undetected: estimating the total number of loci underlying a quantitative trait. Genetics 2000; 156:2093-107. [PMID: 11102398 PMCID: PMC1461347 DOI: 10.1093/genetics/156.4.2093] [Citation(s) in RCA: 116] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recent studies have begun to reveal the genes underlying quantitative trait differences between closely related populations. Not all quantitative trait loci (QTL) are, however, equally likely to be detected. QTL studies involve a limited number of crosses, individuals, and genetic markers and, as a result, often have little power to detect genetic factors of small to moderate effects. In this article, we develop an estimator for the total number of fixed genetic differences between two parental lines. Like the Castle-Wright estimator, which is based on the observed segregation variance in classical crossbreeding experiments, our QTL-based estimator requires that a distribution be specified for the expected effect sizes of the underlying loci. We use this expected distribution and the observed mean and minimum effect size of the detected QTL in a likelihood model to estimate the total number of loci underlying the trait difference. We then test the QTL-based estimator and the Castle-Wright estimator in Monte Carlo simulations. When the assumptions of the simulations match those of the model, both estimators perform well on average. The 95% confidence limits of the Castle-Wright estimator, however, often excluded the true number of underlying loci, while the confidence limits for the QTL-based estimator typically included the true value approximately 95% of the time. Furthermore, we found that the QTL-based estimator was less sensitive to dominance and to allelic effects of opposite sign than the Castle-Wright estimator. We therefore suggest that the QTL-based estimator be used to assess how many loci may have been missed in QTL studies.
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Boreham BW, Jones CD, Griffiths RF. Field evaluation of a new Langmuir-type probe for atmospheric dispersion studies using ions as a tracer. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3735/18/3/012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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185
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Cox PM, Betts RA, Jones CD, Spall SA, Totterdell IJ. Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model. Nature 2000; 408:184-7. [PMID: 11089968 DOI: 10.1038/35041539] [Citation(s) in RCA: 910] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The continued increase in the atmospheric concentration of carbon dioxide due to anthropogenic emissions is predicted to lead to significant changes in climate. About half of the current emissions are being absorbed by the ocean and by land ecosystems, but this absorption is sensitive to climate as well as to atmospheric carbon dioxide concentrations, creating a feedback loop. General circulation models have generally excluded the feedback between climate and the biosphere, using static vegetation distributions and CO2 concentrations from simple carbon-cycle models that do not include climate change. Here we present results from a fully coupled, three-dimensional carbon-climate model, indicating that carbon-cycle feedbacks could significantly accelerate climate change over the twenty-first century. We find that under a 'business as usual' scenario, the terrestrial biosphere acts as an overall carbon sink until about 2050, but turns into a source thereafter. By 2100, the ocean uptake rate of 5 Gt C yr(-1) is balanced by the terrestrial carbon source, and atmospheric CO2 concentrations are 250 p.p.m.v. higher in our fully coupled simulation than in uncoupled carbon models, resulting in a global-mean warming of 5.5 K, as compared to 4 K without the carbon-cycle feedback.
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186
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McGahan JP, Griffey SM, Schneider PD, Brock JM, Jones CD, Zhan S. Radio-frequency electrocautery ablation of mammary tissue in swine. Radiology 2000; 217:471-6. [PMID: 11058648 DOI: 10.1148/radiology.217.2.r00nv37471] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE To establish the size, configuration, and histopathologic features of acute, subacute, and chronic radio-frequency (RF) electrocautery of mammary tissue in swine. MATERIALS AND METHODS Eighteen RF treatments were performed in the mammary tissue of three domestic swine under ultrasonographic (US) guidance. Histopathologic examination was performed immediately after (acute animal); 2 weeks after (subacute animal); and 4 weeks after (chronic animal) treatment. RESULTS In the acute animal, lesions were firm nodules on palpation and had a distinct line of demarcation between necrotic and viable mammary tissue (mean lesion volume, 14.24 cm(3); largest volume, 29.06 cm(3)). In the subacute animal, there was diffuse coagulation necrosis with neutrophilic infiltrates at the periphery (mean lesion volume, 6.46 cm(3); largest volume, 9.47 cm(3)), and two treatment areas had a secondary bacterial infection. In the chronic animal, lesions were still palpable and firm (mean lesion volume, 11.67 cm(3); largest volume, 25.5 cm(3)), and five of six treatment sites had an area of gray to white fibrotic tissue that blended with the surrounding tissue. However, one site had a pale yellow area of central necrosis surrounded by a fibrotic area. In both the subacute and chronic animals, two and one treatment site, respectively, had minimal areas of skin necrosis. CONCLUSION RF ablation of breast tissue is feasible in this animal model. Problems included minimal skin erythema, residual firm treatment regions at 4 weeks, slightly variable margins of coagulation necrosis, and occasional bacterial infection.
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187
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Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Ferguson T, Vogel H, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J. Measurements of the mass, total width, and two-photon partial width of the eta(c) meson. PHYSICAL REVIEW LETTERS 2000; 85:3095-3099. [PMID: 11019275 DOI: 10.1103/physrevlett.85.3095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2000] [Indexed: 05/23/2023]
Abstract
Using 13.4 fb(-1) of data collected with the CLEO detector at the Cornell Electron Storage Ring, we have observed 300 events for the two-photon production of ground-state pseudoscalar charmonium in the decay eta(c)-->K(0)(S)K-/+pi(+/-). We have measured the eta(c) mass to be [2980.4+/-2.3 (stat)+/-0.6 (syst)] MeV and its full width as [27.0+/-5.8 (stat)+/-1.4 (syst)] MeV. We have determined the two-photon partial width of the eta(c) meson to be [7.6+/-0.8 (stat)+/-0.4 (syst)+/-2.3 (br)] keV, with the last uncertainty associated with the decay branching fraction.
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Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Mahmood AH, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi J, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Menon N, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Kwon Y, Lyon AL, Thorndike EH. Study of charmless hadronic B meson decays to pseudoscalar-vector final states. PHYSICAL REVIEW LETTERS 2000; 85:2881-2885. [PMID: 11005959 DOI: 10.1103/physrevlett.85.2881] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2000] [Indexed: 05/23/2023]
Abstract
We report results of searches for charmless hadronic B meson decays to pseudoscalar( pi(+/-), K+/-, pi(0), or K(0)(S))-vector( rho, K(*), or omega) final states. By using 9.7x10(6) BB pairs collected with the CLEO detector, we report the first observation of B(-)--->pi(-)rho(0), B(0)-->pi(+/-)rho(-/+), and B(-)-->pi(-)omega, which are expected to be dominated by hadronic b-->u transitions. The measured branching fractions are (10.4(+3.3)(-3.4)+/-2.1)x10(-6), (27.6(+8.4)(-7.4)+/-4.2)x10(-6), and (11.3(+3.3)(-2.9)+/-1. 4)x10(-6), respectively. Branching fraction upper limits are set for all of the other decay modes investigated.
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189
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McGahan JP, Cronan MS, Richards JR, Jones CD. Comparison of US utilization and technical costs before and after establishment of 24-hour in-house coverage for US examinations. Radiology 2000; 216:788-91. [PMID: 10966712 DOI: 10.1148/radiology.216.3.r00se19788] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To compare data regarding the cost and number of ultrasonographic (US) examinations performed for 6 months, before and after institution of 24-hour in-house sonographer coverage. MATERIALS AND METHODS Data for a 6-month period during which US services were provided by a sonographer on call from 11 PM to 7 AM were compared with data for a 6-month period during which a sonographer was in house during this shift. RESULTS With 11 PM to 7 AM on-call coverage, the sonographers performed 147 examinations in a 6-month period, an average of 0.81 examination per shift. After institution of in-house coverage for this shift, 792 US examinations were performed in 6 months, an average of 4.3 examinations per shift. The cost for 11 PM to 7 AM in-house sonographer coverage for 6 months was approximately $16,000 more than that for on-call coverage. This cost would be offset by revenues from one additional examination per night. The cost per examination for the 11 PM to 7 AM shift decreased from $124.70 to $43.33. CONCLUSION At the authors' institution, 24-hour in-house sonographer coverage resulted in additional cost, which was offset by revenues from additional examinations. There was nearly a fivefold increase in the number of US examinations performed per shift. These examinations were performed more expediently, enabling more rapid patient triage.
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190
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Kohler S, Jones CD, Warnke RA, Zehnder JL. PCR-heteroduplex analysis of T-cell receptor gamma gene rearrangement in paraffin-embedded skin biopsies. Am J Dermatopathol 2000; 22:321-7. [PMID: 10949457 DOI: 10.1097/00000372-200008000-00005] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We developed a rapid, simple, and sensitive method for the detection of T-cell receptor-gamma (TCRgamma) gene rearrangements in paraffin-embedded skin biopsies. Available techniques often require either fresh tissue, several primer pairs, nested amplifications, or specialized electrophoresis steps such as denaturing gradient gel electrophoresis. Our method is based on heteroduplex analysis of polymerase chain reaction (PCR) products of the TCRgamma in a nondenaturing modified polyacrylamide gel using a single pair of primers and is adapted for paraffin-embedded tissue. When tested against Southern blot analysis, the PCR results correlated in 8 of 9 cases. Six mature cutaneous B-cell lymphomas and 29 inflammatory skin disorders all resulted in a polyclonal amplification pattern. When analyzing 3-mm or 4-mm punch biopsies of 51 cases of cutaneous T-cell lymphoma, 37 (72.5%) showed a clonal rearrangement with this technique. For 7 cases of patch stage mycosis fungoides, frozen tissue and formalin-fixed and paraffin-embedded tissue was available, and in 5 of 7 cases (71%), the results in frozen and paraffin-embedded tissue were concordant. One case showed a clonal pattern in frozen tissue but not in paraffin-embedded tissue, and one case was polyclonal in frozen tissue but monoclonal in paraffin-embedded tissue. Using serial dilutions of DNA from a T-cell ALL in a polyclonal background (tonsil), we established a sensitivity of 0.5%. Heteroduplex PCR of the TCRgamma is a rapid, sensitive, and inexpensive screening procedure as well as a useful adjunct to histologic analysis and immunophenotyping of cutaneous T-cell proliferations.
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MESH Headings
- Biopsy, Needle
- Blotting, Southern
- DNA Primers/chemistry
- DNA, Neoplasm/analysis
- Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor/genetics
- Genes, T-Cell Receptor gamma/genetics
- Heteroduplex Analysis/methods
- Humans
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Lymphoma, T-Cell, Cutaneous/genetics
- Lymphoma, T-Cell, Cutaneous/pathology
- Mycosis Fungoides/genetics
- Mycosis Fungoides/pathology
- Paraffin Embedding
- Polymerase Chain Reaction/methods
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Skin Neoplasms/genetics
- Skin Neoplasms/pathology
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191
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Higgins JP, van de Rijn M, Jones CD, Zehnder JL, Warnke RA. Peripheral T-cell lymphoma complicated by a proliferation of large B cells. Am J Clin Pathol 2000; 114:236-47. [PMID: 10941339 DOI: 10.1309/72cm-kaxf-66de-4xva] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
We studied 14 cases that showed a morphologic appearance of peripheral T-cell lymphoma and contained substantial numbers of CD20+ large B cells. In all but 2 cases, the CD20+ large cells showed a mix of kappa and lambda light chain expression. Two cases showed a focal predominance of kappa expression. In situ hybridization using the EBER1 probe for detection of Epstein-Barr virus (EBV) RNA was performed on every case. EBV RNA was present in 10 cases. Of 8 cases with EBV RNA stained by immunohistochemistry for the latent membrane protein of EBV, 6 were positive. Double-labeling immunohistochemistry and in situ hybridization confirmed that EBV was present in the large B cells. Polymerase chain reaction (PCR) analysis showed a clonal rearrangement of the T-cell receptor (TCR)-gamma chain gene in 12 of 13 cases tested. One additional case showed a clonal rearrangement of the TCR-beta chain gene by Southern blot hybridization. PCR analysis showed a clonal immunoglobulin gene rearrangement in 5 cases, a suggestion of a clonal rearrangement in 1, an oligoclonal pattern in 4, and a polyclonal pattern in 4. The finding of large B and T cells may result in a misdiagnosis of a reactive process or of T-cell-rich B-cell lymphoma. The presence of EBV in some cases could cause further confusion with the reactive T- and B-immunoblastic proliferation of infectious mononucleosis.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antigens, CD20/immunology
- Blotting, Southern
- DNA Primers/chemistry
- DNA, Neoplasm/analysis
- Epstein-Barr Virus Infections/complications
- Epstein-Barr Virus Infections/pathology
- Epstein-Barr Virus Infections/virology
- Female
- Fluorescent Antibody Technique, Indirect
- Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor/genetics
- Herpesvirus 4, Human/genetics
- Herpesvirus 4, Human/isolation & purification
- Humans
- Immunoglobulin kappa-Chains/genetics
- Immunoglobulin lambda-Chains/genetics
- In Situ Hybridization
- Lymphoma, B-Cell/complications
- Lymphoma, B-Cell/pathology
- Lymphoma, B-Cell/virology
- Lymphoma, Large B-Cell, Diffuse/complications
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Large B-Cell, Diffuse/virology
- Lymphoma, T-Cell, Peripheral/complications
- Lymphoma, T-Cell, Peripheral/pathology
- Lymphoma, T-Cell, Peripheral/virology
- Male
- Middle Aged
- Polymerase Chain Reaction
- RNA, Viral/analysis
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192
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Fadiran EO, Jones CD, Ette EI. Designing population pharmacokinetic studies: performance of mixed designs. Eur J Drug Metab Pharmacokinet 2000; 25:231-9. [PMID: 11420896 DOI: 10.1007/bf03192320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
The interplay of the following factors: population design (PDN), the cost function in terms of maximum cost (Max. C) (i.e., maximum number of samples/sample size), sample size, and intersubject variability [restricted (30%) to moderate (60%)] on the estimation of pharmacokinetic parameters from population pharmacokinetic data sets obtained using mixed designs was investigated in a simulation study. A two compartment model with multiple bolus intravenous inputs was assumed, and the residual variability was set at 15%. The sample size (N) investigated ranged from 30 to 200 with the associated cost function varying accordingly with the five individual and sixteen population designs studied. Accurate and precise estimates of structural model parameters were obtained for N > or = 50 (Max. C > or = 150) irrespective of the intersubject variability (ITV) and PDN investigated. When ITV was 30%, all structural model parameters were well estimated irrespective of the PDN. Robust estimates of clearance and its variability were obtained for all N at all levels of ITV with Max. C > or = 90 (PDN > or = 4). Imprecise estimates of ITV in V1, V2, and Q were obtained at 60% ITV irrespective of N, PDN, or Max. C. Positive bias was associated with the estimation of variability in V1, V2, and Q with PDN < or = 4 (Max. C < or = 150). This was due in part to a greater proportion of subjects sampled only once. Correspondingly, residual variability was underestimated. It is of utmost importance to avoid this artifact by ensuring that at least a moderate subset of subjects contributing data to a population pharmacokinetic study contribute data more than once. Given a sample size and ITV, the cost function must be considered in designing a population pharmacokinetic study using mixed designs.
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193
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Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas S, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD. Search for CP violation in B+/- --> J/psiK+/- and B+/- --> psi(2S)K+/- decays. PHYSICAL REVIEW LETTERS 2000; 84:5940-5944. [PMID: 10991094 DOI: 10.1103/physrevlett.84.5940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2000] [Indexed: 05/23/2023]
Abstract
We present a search for direct CP violation in B+/--->J/psiK+/- and B+/--->psi(2S)K+/- decays. In a sample of 9.7x10(6) B&Bmacr; meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+/--->J/psiK+/- and 120 B+/--->psi(2S)K+/- decays with very low background. We have measured the CP-violating charge asymmetry to be [+1.8+/-4.3(stat)+/-0.4(syst)]% for B+/--->J/psiK+/- and [+2.0+/-9. 1(stat)+/-1.0(syst)]% for B+/--->psi(2S)K+/-.
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Natkunam Y, Warnke RA, Zehnder JL, Jones CD, Milatovich-Cherry A, Cornbleet PJ. Blastic/blastoid transformation of follicular lymphoma: immunohistologic and molecular analyses of five cases. Am J Surg Pathol 2000; 24:525-34. [PMID: 10757399 DOI: 10.1097/00000478-200004000-00006] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Progression of follicular lymphoma to a higher-grade malignancy frequently heralds a poor prognosis. Clinical transformation is variably accompanied by a spectrum of histologic changes characterized by alteration in growth and cytology. Although several cytogenetic events and potential oncogenes have been documented in this progression, the underlying molecular mechanisms are largely unknown. We present five patients with an unusual histologic transformation of follicular lymphoma manifested by blastic/blastoid morphology. This transformation is histologically distinct from other types of transformation of follicular lymphoma. All five cases exhibited the t(14;18) translocation and expressed the BCL-2 protein. In addition, two of the five patients showed increased levels of the p53 protein within neoplastic cells implicating a possible role for this oncogene in blastic/blastoid transformation. The lack of BCL-1 and myeloid antigens by immunohistochemistry and flow cytometry studies served to distinguish blastic/blastoid transformation of follicular lymphoma from its morphologic mimics. This distinction is clinically important because lymphoblastic and myeloid leukemias require significantly different therapeutic modalities and show better prognosis. Moreover, the lack of Epstein-Barr virus-specific mRNA suggests that this virus is unlikely to participate in blastic/blastoid transformation of follicular lymphoma.
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MESH Headings
- Adult
- Aged
- Cell Transformation, Neoplastic/chemistry
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/pathology
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 18
- Cyclin D1/analysis
- Cytogenetics
- DNA Primers/chemistry
- DNA, Neoplasm/analysis
- Disease Progression
- Female
- Flow Cytometry
- Herpesvirus 4, Human/isolation & purification
- Humans
- Lymphoma, Follicular/chemistry
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/pathology
- Male
- Middle Aged
- Polymerase Chain Reaction
- Proto-Oncogene Proteins c-bcl-2/analysis
- RNA, Viral/analysis
- Translocation, Genetic
- Tumor Suppressor Protein p53/analysis
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195
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Jones CD, Okhravi N, Adamson P, Tasker S, Lightman S. Comparison of PCR detection methods for B1, P30, and 18S rDNA genes of T. gondii in aqueous humor. Invest Ophthalmol Vis Sci 2000; 41:634-44. [PMID: 10711675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
PURPOSE Comparison of polymerase chain reaction (PCR) amplification of three Toxoplasma gondii genes in aqueous humor. METHODS Nested PCRs carried out using published methods were optimized for maximum sensitivity and specificity. Five pairs of oligonucleotide primers, directed against the B1, P30, and ribosomal genes, were used and compared to determine which sequences were most effective in detecting T. gondii DNA. Methods were developed with DNA templates in water and were subsequently applied to both normal and inflamed aqueous. RESULTS After one round of PCR amplification, P30 and ribosomal primers were able to detect 1 pg genomic T. gondii DNA. However, those directed against the B1 gene were able to detect 50 fg (approximately single tachyzoite). This level of sensitivity was also achieved using the P30 primers after a second round of PCR; however, only primers based on the B1 gene maintained this level of sensitivity in both normal and inflamed aqueous. B1-specific primers did not amplify sequences from fungal, bacterial, or human lymphocyte DNA. The sensitivity of T. gondii detection using B1 gene-specific primers was not compromised when large amounts of human lymphocyte DNA were present, and application to an ocular sample or retinal section from patients with toxoplasma chorioretinitis was successful in confirming the presence of T. gondii DNA. CONCLUSIONS The B1 PCR protocol appears to be the most sensitive protocol in the detection of T. gondii DNA and has been successful in identification of T. gondii DNA in ocular fluids and retinal sections. This provides direct evidence of the presence of T. gondii within the eye and may therefore help in the management of toxoplasma retinochoroiditis.
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196
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Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO. First observation of the decay B --> J/psistraight phiK. PHYSICAL REVIEW LETTERS 2000; 84:1393-1397. [PMID: 11017526 DOI: 10.1103/physrevlett.84.1393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/1999] [Indexed: 05/23/2023]
Abstract
We present the first observation of the decay B-->J/psistraight phiK. Using 9.6x10(6) B&Bmacr; meson pairs collected with the CLEO detector, we have observed ten fully reconstructed B-->J/psistraight phiK candidates, whereas the estimated background is 0.5+/-0.2 event. We obtain a branching fraction of B(B-->J/psistraight phiK) = (8. 8(+3.5)(-3.0)[stat]+/-1.3[syst])x10(-5). This is the first observed B meson decay requiring the creation of an additional s&smacr; quark pair.
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197
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Abstract
The colour vision of domestic chicks (Gallus gallus) was investigated by training them to small food containers decorated with tilings of grey and coloured rectangles. Chicks learn to recognise the colour quickly and accurately. Chicks have four types of single-cone photoreceptor sensitive to ultraviolet, short-, medium- or long-wavelength light. To establish how these receptors are used for colour vision, stimuli were designed to be distinguished only by specific combinations of receptors. We infer (1) that all four single cones are used, and (2) that their outputs are encoded by at least three opponency mechanisms: one comparing the outputs of ultraviolet- and short-wavelength-sensitive receptors, one comparing the outputs of medium- and long-wavelength receptors and a third comparing of the outputs of short- and long- and/or medium-wavelength receptors. Thus, the chicks have tetrachromatic colour vision. These experiments do not exclude a role for the fifth cone type, double cones, but other evidence suggests that these cones serve luminance-based tasks, such as motion detection, and not colour recognition.
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198
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Zehnder JL, Hiraki DD, Jones CD, Gross N, Grumet FC. Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford [erratum]. Thromb Haemost 1999; 82:XII. [PMID: 10681265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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199
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Zehnder JL, Hiraki DD, Jones CD, Gross N, Grumet FC. Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford. Thromb Haemost 1999; 82:1097-9. [PMID: 10494770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
An index patient with pseudohomozygosity for factor V Leiden was identified. Each of his two children inherited a different paternal factor V allele; a daughter was heterozygous for factor V Leiden, with 100% factor V activity, and a son was heterozygous for factor V deficiency, with 50% factor V activity. Genomic DNA was obtained from family members, and the 25 factor V exons and flanking intronic regions were sequenced in the proband and confirmed in the children. Within exon 13 of factor V, a 4 base insertion was found at NT 2856 in the proband and son. but not the daughter. This mutation, here designated factor V Stanford, results in a frameshift with loss of a thrombin activation site (R1545V) and premature termination of translation at amino acid 1560.
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200
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Sun H, Fadiran EO, Jones CD, Lesko L, Huang SM, Higgins K, Hu C, Machado S, Maldonado S, Williams R, Hossain M, Ette EI. Population pharmacokinetics. A regulatory perspective. Clin Pharmacokinet 1999; 37:41-58. [PMID: 10451782 DOI: 10.2165/00003088-199937010-00003] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The application of population approaches to drug development is recommended in several US Food and Drug Administration (FDA) guidance documents. Population pharmacokinetic (and pharmacodynamic) techniques enable identification of the sources of inter- and intra-individual variability that impinge upon drug safety and efficacy. This article briefly discusses the 2-stage approach to the estimation of population pharmacokinetic parameters, which requires serial multiple measurements on each participant, and comprehensively reviews the nonlinear mixed-effects modelling approach, which can be applied in situations where extensive sampling is not done on all or any of the participants. Certain preliminary information, such as the compartment model used in describing the pharmacokinetics of the drug, is required for a population pharmacokinetic study. The practical design considerations of the location of sampling times, number of samples/participants and the need to sample an individual more than once should be borne in mind. Simulation may be useful for choosing the study design that will best meet study objectives. The objectives of the population pharmacokinetic study can be secondary to the objectives of the primary clinical study (in which case an add-on population pharmacokinetic protocol may be needed) or primary (when a stand-alone protocol is required). Having protocols for population pharmacokinetic studies is an integral part of 'good pharmacometric practice'. Real-time data assembly and analysis permit an ongoing evaluation of site compliance with the study protocol and provide the opportunity to correct violations of study procedures. Adequate policies and procedures should be in place for study blind maintenance. Real-time data assembly creates the opportunity for detecting and correcting errors in concentration-time data, drug administration history and covariate data. Population pharmacokinetic analyses may be undertaken in 3 interwoven steps: exploratory data analysis, model development and model validation (i.e. predictive performance). Documentation for regulatory purposes should include a complete inventory of key runs in the analyses undertaken (with flow diagrams if possible), accompanied by articulation of objectives, assumptions and hypotheses. Use of diagnostic analyses of goodness of fit as evidence of reliability of results is advised. Finally, the use of stability testing or model validation may be warranted to support label claims. The opinions expressed in this article were revised by incorporating comments from various sources and published by the FDA as 'Guidance for Industry: Population Pharmacokinetics' (see the FDA home page http:/(/)www.fda.gov for further information).
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