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Pothan LA, Simon F, Spange S, Thomas S. XPS Studies of Chemically Modified Banana Fibers. Biomacromolecules 2006; 7:892-8. [PMID: 16529428 DOI: 10.1021/bm050462a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Banana fibers obtained from the sheath of the banana plant (Musa Sapientum) whose major constituent is cellulose were modified using various chemical agents in order to improve their compatibility with the polymer matrix. The change in the surface composition of the raw and chemically modified fiber was investigated using various techniques such as solvatochromism, electrokinetic measurements, and XPS. Surface characterization by XPS showed the presence of numerous elements on the surface of the fiber. Investigation of the surface after alkali treatment on the other hand showed the removal of most of the elements. Silane treatment was found to introduce a considerable amount of silicon on the surface of the fiber. The [O]/[C] ratio was found to decrease in all cases except for the fluorinated and vinyl silane treated fibers. Detailed investigation of the deconvoluted C 1s spectra revealed the change in the percentage atomic concentration of the various elements on the fiber surface. The dissolution of the various surface components by alkali treatment, which was earlier revealed by SEM, was further confirmed by XPS. The XPS results were found to perfectly agree with the solvatochromic and electrokinetic measurements.
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302
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Simon F, Demortiere E, Chadli M, Kraemer P, De Pina JJ. [Risk of noscomial infection in intertropical Africa--part 1: background]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2006; 66:91-6. [PMID: 16615624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Nosocomial infection is a risk in any health care setting. A review of recent medical literature shows that there is a paucity of information on nosocomial infection in intertropical Africa. Often misunderstood or denied, nosocomial infection is in reality an underestimated public health problem at most medical facilities even university hospital centers. However most hospitals are confronted with the same financial, structural and logistics difficulties, with limited training and awareness about hospital hygiene among caregivers, and with situations bringing together contagious infections with susceptible subjects. Assessment of the risks for patients and caregivers is a necessary prerequisite for implementing measures to control nosocomial infections in intertropical Africa.
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303
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Morand JJ, Simon F, Garnotel E, Mahé A, Clity E, Morlain B. [Overview of endemic treponematoses]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2006; 66:15-20. [PMID: 16615610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Endemic treponematoses including yaws, bejel, pinta are distinguished from venereal syphilis on the basis of epidemiological characteristics and clinical manifestations. They cannot be differentiated by morphological and serological methods. A few minor genetic differences have been identified among the subspecies (Treponema pallidum sp. pallidum, pertenue, endemicum, carateum). Although penicillin therapy is effective, these infectious diseases have yet to be eliminated.
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304
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Fritz D, Freeman KP, Hopfner C, Fontaine OD, Seroka M, Simon F, Musch D, Rabeyrin M. Multilobulated "flower" cells in a subcutaneous mass aspirate from a cat. Vet Clin Pathol 2006; 34:429-33. [PMID: 16270275 DOI: 10.1111/j.1939-165x.2005.tb00076.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An 8-year-old intact male cat was presented with a subcutaneous mass in the region of the right jugular vein. Cytologic and histopathologic examinations revealed cells with multilobulated nuclei (flower cells). Immunochemistry using a panel of markers showed vimentin-positivity on cytologic specimens, and postive staining for CD79a and BLA36 on histologic specimens. The final diagnosis was lymphoma of B-cell origin. We have observed similar multilobulated cells in ascites fluid, thoracic fluid, and peripheral blood from dogs and cats with a variety of lymphoid and myeloid neoplasms. Cells with multilobulated nuclei that resemble flower petals also have been described in humans. These cells are infrequently observed in canine and feline cytology specimens and require immunochemistry to determine their cell of origin.
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305
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Nitschke M, König U, Lappan U, Minko S, Simon F, Zschoche S, Werner C. Low pressure plasma-based approaches to fluorocarbon polymer surface modification. J Appl Polym Sci 2006. [DOI: 10.1002/app.24717] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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306
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Singer PM, Wzietek P, Alloul H, Simon F, Kuzmany H. NMR evidence for gapped spin excitations in metallic carbon nanotubes. PHYSICAL REVIEW LETTERS 2005; 95:236403. [PMID: 16384324 DOI: 10.1103/physrevlett.95.236403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Indexed: 05/05/2023]
Abstract
We report on the spin dynamics of 13C isotope enriched inner walls in double-wall carbon nanotubes using 13C nuclear magnetic resonance. Contrary to expectations, we find that our data set implies that the spin-lattice relaxation time (T1) has the same temperature (T) and magnetic field (H) dependence for most of the inner-wall nanotubes detected by NMR. In the high-temperature regime (T approximately > or = 150 K), we find that the T and H dependence of 1/T1T is consistent with a 1D metallic chain. For T approximately < or = 150 K we find a significant increase in 1/T1T with decreasing T, followed by a sharp drop below approximately = 20 K. The data clearly indicate the formation of a gap in the spin excitation spectrum, where the gap value 2delta approximately = 40 K (congruent to 3.7 meV) is H independent.
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307
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Plantier JC, Lemée V, Dorval I, Gueudin M, Braun J, Hutin P, Ruffault A, Curie A, Simon F. [HIV1 group M superinfection in a HIV1 group0-infected patient]. Virologie (Montrouge) 2005; 9:483-486. [PMID: 34732008 DOI: 10.1684/vir.2011.2811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
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308
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Mühlau M, Rauschecker JP, Oestreicher E, Gaser C, Röttinger M, Wohlschläger AM, Simon F, Etgen T, Conrad B, Sander D. Structural Brain Changes in Tinnitus. Cereb Cortex 2005; 16:1283-8. [PMID: 16280464 DOI: 10.1093/cercor/bhj070] [Citation(s) in RCA: 266] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Tinnitus is a common but poorly understood disorder characterized by ringing or buzzing in the ear. Central mechanisms must play a crucial role in generating this auditory phantom sensation as it persists in most cases after severing the auditory nerve. One hypothesis states that tinnitus is caused by a reorganization of tonotopic maps in the auditory cortex, which leads to an overrepresentation of tinnitus frequencies. Moreover, the participation of the limbic system in generating tinnitus has been postulated. Here we aimed at identifying brain areas that display structural change in tinnitus. We compared tinnitus sufferers with healthy controls by using high-resolution magnetic resonance imaging and voxel-based morphometry. Within the auditory pathways, we found gray-matter increases only at the thalamic level. Outside the auditory system, gray-matter decrease was found in the subcallosal region including the nucleus accumbens. Our results suggest that reciprocal involvement of both sensory and emotional areas are essential in the generation of tinnitus.
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309
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Daligand H, Weber G, Simon F. [International conference on tropical medicine "Medicine and health in the Tropics" September 11 to 15 2005. Severe acute toxoplasmosis in immunocompromised subjects: an outbreak in the Amazon?]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2005; 65:420-1. [PMID: 16465798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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310
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Tavana H, Simon F, Grundke K, Kwok DY, Hair ML, Neumann AW. Interpretation of contact angle measurements on two different fluoropolymers for the determination of solid surface tension. J Colloid Interface Sci 2005; 291:497-506. [PMID: 15925379 DOI: 10.1016/j.jcis.2005.05.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2004] [Revised: 04/29/2005] [Accepted: 05/02/2005] [Indexed: 11/25/2022]
Abstract
Contact angle measurements with a large number of liquids on the semi-fluorinated acryl polymer EGC-1700 films are reported. The surface tension was determined to be gammasv=13.84 mJ/m2 from contact angles of octamethylcyclotetrasiloxane (OMCTS) and decamethylcyclopentasiloxane (DMCPS). Inertness of these two liquids makes them ideal for determination of surface tension of low-energy fluoropolymers. On the other hand, contact angles of many other liquids deviated somewhat from a smooth contact angle pattern that represents the EGC-1700 surface tension. It is argued that noninertness of the molecules of these liquids gives rise to specific interactions with the polymer film, causing the deviations. Furthermore, contact angles of a series of n-alkanes (n-hexane to n-hexadecane) showed systematic deviations from this curve, similar to the trend observed for n-alkanes/Teflon AF 1600 systems studied earlier. Adsorption of vapor of short-chain liquids onto the polymer film caused their contact angles to fall above the gammasv=13.84 mJ/m2 curve, and a parallel alignment of molecules of the long-chain n-alkanes in the vicinity of the solid was the explanation for the deviation of their contact angles below it. It is found that vapor adsorption effect is more significant in the case of Teflon AF 1600, while the alignment of liquid molecules close to the surface is more pronounced for EGC-1700.
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311
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Grand B, Aletti M, Simon F. [International conference on tropical medicine "Medicine and health in the Tropics" September 11 to 15 2005. Malaria--clinical aspects]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2005; 65:407-8. [PMID: 16465790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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312
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Hasi F, Simon F, Kuzmany H. Reversible hole engineering for single-wall carbon nanotubes. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2005; 5:1785-91. [PMID: 16433411 DOI: 10.1166/jnn.2005.433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Experimental results are provided for reversible generation of holes on single-wall carbon nanotubes and their closing by temperature treatment. The generation of the holes was analyzed by checking the amount of C60 fullerenes that can be filled into the tubes and subsequently transformed to an inner-shell tube. The concentration of the latter was determined from the Raman response of the radial breathing mode. The tube opening process was performed by exposure of the tubes to air at elevated temperatures. This process was found to be independent from the tube diameters. In contrast, the tube closing process was found to depend strongly of the tube diameter. For large diameter tubes (d = 1.8 nm) the activation energy was 1.7 eV whereas for the small diameter tubes this energy was only 0.33 eV. Optimum conditions for tube closing were found to be one hour at 800 degrees C or 10 minutes at 1000 degrees C. From the almost identical Raman spectra for the tubes before and after engineering, a predominant generation of the holes at the tube ends is concluded.
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Adams J, Adler C, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Arkhipkin D, Averichev GS, Badyal SK, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bezverkhny BI, Bhardwaj S, Bhati AK, Bichsel H, Billmeier A, Bland LC, Blyth CO, Bonner BE, Botje M, Boucham A, Brandin A, Bravar A, Cadman RV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Carroll J, Castillo J, Cebra D, Chaloupka P, Chattopadhyay S, Chen HF, Chen Y, Chernenko SP, Cherney M, Chikanian A, Christie W, Coffin JP, Cormier TM, Cramer JG, Crawford HJ, Das D, Das S, Derevschikov AA, Didenko L, Dietel T, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Dutta Majumdar MR, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faine V, Faivre J, Fatemi R, Filimonov K, Filip P, Finch E, Fisyak Y, Flierl D, Foley KJ, Fu J, Gagliardi CA, Gagunashvili N, Gans J, Ganti MS, Gaudichet L, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Grachov O, Grebenyuk O, Gronstal S, Grosnick D, Guertin SM, Gupta A, Gutierrez TD, Hallman TJ, Hamed A, Hardtke D, Harris JW, Heinz M, Henry TW, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Huang HZ, Huang SL, Hughes E, Humanic TJ, Igo G, Ishihara A, Jacobs P, Jacobs WW, Janik M, Jiang H, Johnson I, Jones PG, Judd EG, Kabana S, Kaplan M, Keane D, Khodyrev VY, Kiryluk J, Kisiel A, Klay J, Klein SR, Klyachko A, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kovalenko AD, Kramer M, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kulikov AI, Kumar A, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lamont MAC, Landgraf JM, Lange S, Lasiuk B, Laue F, Lauret J, Lebedev A, Lednický R, Levine MJ, Li C, Li Q, Lindenbaum SJ, Lisa MA, Liu F, Liu L, Liu Z, Liu QJ, Ljubicic T, Llope WJ, Long H, Longacre RS, Lopez-Noriega M, Love WA, Ludlam T, Lynn D, Ma J, Ma YG, Magestro D, Mahajan S, Mangotra LK, Mahapatra DP, Majka R, Manweiler R, Margetis S, Markert C, Martin L, Marx J, Matis HS, Matulenko YA, McClain CJ, McShane TS, Meissner F, Melnick Y, Meschanin A, Miller ML, Milosevich Z, Minaev NG, Mironov C, Mischke A, Mishra D, Mitchell J, Mohanty B, Molnar L, Moore CF, Mora-Corral MJ, Morozov DA, Morozov V, de Moura MM, Munhoz MG, Nandi BK, Nayak SK, Nayak TK, Nelson JM, Netrakanti PK, Nikitin VA, Nogach LV, Norman B, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Paic G, Pal SK, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Peitzmann T, Perevoztchikov V, Perkins C, Peryt W, Petrov VA, Phatak SC, Picha R, Planinic M, Pluta J, Porile N, Porter J, Poskanzer AM, Potekhin M, Potrebenikova E, Potukuchi BVKS, Prindle D, Pruneau C, Putschke J, Rai G, Rakness G, Raniwala R, Raniwala S, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Renault G, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevski OV, Romero JL, Rose A, Roy C, Ruan LJ, Sahoo R, Sakrejda I, Salur S, Sandweiss J, Savin I, Schambach J, Scharenberg RP, Schmitz N, Schroeder LS, Schweda K, Seger J, Seyboth P, Shahaliev E, Shao M, Shao W, Sharma M, Shestermanov KE, Shimanskii SS, Singaraju RN, Simon F, Skoro G, Smirnov N, Snellings R, Sood G, Sorensen P, Sowinski J, Speltz J, Spinka HM, Srivastava B, Stanislaus TDS, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Struck C, Suaide AAP, Sugarbaker E, Suire C, Sumbera M, Surrow B, Symons TJM, Szanto de Toledo A, Szarwas P, Tai A, Takahashi J, Tang AH, Thein D, Thomas JH, Timoshenko S, Tokarev M, Tonjes MB, Trainor TA, Trentalange S, Tribble RE, Tsai O, Ullrich T, Underwood DG, Van Buren G, Vandermolen AM, Varma R, Vasilevski I, Vasiliev AN, Vernet R, Vigdor SE, Viyogi YP, Voloshin SA, Vznuzdaev M, Waggoner W, Wang F, Wang G, Wang G, Wang XL, Wang Y, Wang ZM, Ward H, Watson JW, Webb JC, Wells R, Westfall GD, Whitten C, Wieman H, Willson R, Wissink SW, Witt R, Wood J, Wu J, Xu N, Xu Z, Xu ZZ, Yamamoto E, Yepes P, Yurevich VI, Yuting B, Zanevski YV, Zhang H, Zhang WM, Zhang ZP, Zhaomin ZP, Zizong ZP, Zołnierczuk PA, Zoulkarneev R, Zoulkarneeva J, Zubarev AN. Distributions of charged hadrons associated with high transverse momentum particles in pp and Au+Au collisions at sqrt[sNN]=200 GeV. PHYSICAL REVIEW LETTERS 2005; 95:152301. [PMID: 16241721 DOI: 10.1103/physrevlett.95.152301] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Indexed: 05/05/2023]
Abstract
Charged hadrons in [EQUATION: SEE TEXT] associated with particles of [EQUATION: SEE TEXT] are reconstructed in pp and Au+Au collisions at sqrt[sNN]=200 GeV. The associated multiplicity and p magnitude sum are found to increase from pp to central Au+Au collisions. The associated p distributions, while similar in shape on the nearside, are significantly softened on the awayside in central Au+Au relative to pp and not much harder than that of inclusive hadrons. The results, consistent with jet quenching, suggest that the awayside fragments approach equilibration with the medium traversed.
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314
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de Valk H, Jacquet C, Goulet V, Vaillant V, Perra A, Simon F, Desenclos JC, Martin P. Surveillance of listeria infections in Europe. Euro Surveill 2005; 10:251-5. [PMID: 16282642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023] Open
Abstract
In addition to the economic consequences and threats associated with outbreaks, listeriosis remains of great public health concern, as it has one of the highest case fatality rates of all the foodborne infections (20%-30%), and has common source epidemic potential. Changes in the way food is produced, distributed and stored have created the potential for diffuse and widespread outbreaks involving many countries. In 2002, a survey was carried out to assess the need for and the feasibility of a European network on listeria infections in humans. Data on surveillance systems and laboratory methods were collected through two postal surveys sent to the national Centres for communicable disease surveillance and to the listeria reference laboratories. Surveillance systems for listeria infections were in operation in 16 out of the 17 countries surveyed, and 16 countries had a national reference laboratory (NRL). All countries based their case definition of listeriosis on the isolation of Listeria monocytogenes. Fourteen NRLs performed at least one typing method on human strains. At least 13 countries already carried out or expressed willingness to carry out characterisation of isolates by pulsed field gel electrophoresis (PFGE) of L. monocytogenes strains isolated from human cases following a standard protocol. The participants concluded that there was a clear added value to having a European surveillance network for listeria infections, particularly for outbreak detection and investigation, and that a surveillance network based on the existing national surveillance systems was feasible.
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315
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de Valk H, Jacquet C, Goulet V, Vaillant V, Perra A, Simon F, Desenclos JC, Martin P. Surveillance of listeria infections in Europe. Euro Surveill 2005; 10:9-10. [DOI: 10.2807/esm.10.10.00572-en] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In addition to the economic consequences and threats associated with outbreaks, listeriosis remains of great public health concern, as it has one of the highest case fatality rates of all the foodborne infections (20%-30%), and has common source epidemic potential. Changes in the way food is produced, distributed and stored have created the potential for diffuse and widespread outbreaks involving many countries.
In 2002, a survey was carried out to assess the need for and the feasibility of a European network on listeria infections in humans. Data on surveillance systems and laboratory methods were collected through two postal surveys sent to the national Centres for communicable disease surveillance and to the listeria reference laboratories. Surveillance systems for listeria infections were in operation in 16 out of the 17 countries surveyed, and 16 countries had a national reference laboratory (NRL). All countries based their case definition of listeriosis on the isolation of Listeria monocytogenes. Fourteen NRLs performed at least one typing method on human strains. At least 13 countries already carried out or expressed willingness to carry out characterisation of isolates by pulsed field gel electrophoresis (PFGE) of L. monocytogenes strains isolated from human cases following a standard protocol. The participants concluded that there was a clear added value to having a European surveillance network for listeria infections, particularly for outbreak detection and investigation, and that a surveillance network based on the existing national surveillance systems was feasible.
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316
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Adams J, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Arkhipkin D, Averichev GS, Badyal SK, Bai Y, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellingeri-Laurikainen A, Bellwied R, Berger J, Bezverkhny BI, Bharadwaj S, Bhasin A, Bhati AK, Bhatia VS, Bichsel H, Bielcik J, Bielcikova J, Billmeier A, Bland LC, Blyth CO, Blyth SL, Bonner BE, Botje M, Boucham A, Bouchet J, Brandin AV, Bravar A, Bystersky M, Cadman RV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Castillo J, Catu O, Cebra D, Chajecki Z, Chaloupka P, Chattopadhyay S, Chen HF, Chen JH, Chen Y, Cheng J, Cherney M, Chikanian A, Christie W, Coffin JP, Cormier TM, Cosentino MR, Cramer JG, Crawford HJ, Das D, Das S, Daugherity M, de Moura MM, Dedovich TG, DePhillips M, Derevschikov AA, Didenko L, Dietel T, Dogra SM, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Dutta Mazumdar MR, Eckardt V, Edwards WR, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faivre J, Fatemi R, Fedorisin J, Filimonov K, Filip P, Finch E, Fine V, Fisyak Y, Fornazier KSF, Fu J, Gagliardi CA, Gaillard L, Gans J, Ganti MS, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Gos H, Grachov O, Grebenyuk O, Grosnick D, Guertin SM, Guo Y, Gupta A, Gupta N, Gutierrez TD, Hallman TJ, Hamed A, Hardtke D, Harris JW, Heinz M, Henry TW, Hepplemann S, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horner MJ, Huang HZ, Huang SL, Hughes EW, Humanic TJ, Igo G, Ishihara A, Jacobs P, Jacobs WW, Jedynak M, Jiang H, Jones PG, Judd EG, Kabana S, Kang K, Kaplan M, Keane D, Kechechyan A, Khodyrev VY, Kiryluk J, Kisiel A, Kislov EM, Klay J, Klein SR, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kowalik KL, Kramer M, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kulikov AI, Kumar A, Kutuev RK, Kuznetsov AA, Lamont MAC, Landgraf JM, Lange S, Laue F, Lauret J, Lebedev A, Lednicky R, Lehocka S, LeVine MJ, Li C, Li Q, Li Y, Lin G, Lindenbaum SJ, Lisa MA, Liu F, Liu H, Liu J, Liu L, Liu QJ, Liu Z, Ljubicic T, Llope WJ, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lu Y, Ludlam T, Lynn D, Ma GL, Ma JG, Ma YG, Magestro D, Mahajan S, Mahapatra DP, Majka R, Mangotra LK, Manweiler R, Margetis S, Markert C, Martin L, Marx JN, Matis HS, Matulenko YA, McClain CJ, McShane TS, Meissner F, Melnick Y, Meschanin A, Miller ML, Minaev NG, Mironov C, Mischke A, Mishra DK, Mitchell J, Mohanty B, Molnar L, Moore CF, Morozov DA, Munhoz MG, Nandi BK, Nayak SK, Nayak TK, Nelson JM, Netrakanti PK, Nikitin VA, Nogach LV, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Pal SK, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Peitzmann T, Perevoztchikov V, Perkins C, Peryt W, Petrov VA, Phatak SC, Picha R, Planinic M, Pluta J, Porile N, Porter J, Poskanzer AM, Potekhin M, Potrebenikova E, Potukuchi BVKS, Prindle D, Pruneau C, Putschke J, Rakness G, Raniwala R, Raniwala S, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Reinnarth J, Renault G, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Rose A, Roy C, Ruan L, Russcher M, Sahoo R, Sakrejda I, Salur S, Sandweiss J, Sarsour M, Savin I, Sazhin PS, Schambach J, Scharenberg RP, Schmitz N, Schweda K, Seger J, Seyboth P, Shahaliev E, Shao M, Shao W, Sharma M, Shen WQ, Shestermanov KE, Shimanskiy SS, Sichtermann E, Simon F, Singaraju RN, Smirnov N, Snellings R, Sood G, Sorensen P, Sowinski J, Speltz J, Spinka HM, Srivastava B, Stadnik A, Stanislaus TDS, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Suaide AAP, Sugarbaker E, Suire C, Sumbera M, Surrow B, Swanger M, Symons TJM, Szanto de Toledo A, Tai A, Takahashi J, Tang AH, Tarnowsky T, Thein D, Thomas JH, Timmins AR, Timoshenko S, Tokarev M, Trentalange S, Tribble RE, Tsai OD, Ulery J, Ullrich T, Underwood DG, Van Buren G, van der Kolk N, van Leeuwen M, Vander Molen AM, Varma R, Vasilevski IM, Vasiliev AN, Vernet R, Vigdor SE, Viyogi YP, Vokal S, Voloshin SA, Waggoner WT, Wang F, Wang G, Wang G, Wang XL, Wang Y, Wang Y, Wang ZM, Ward H, Watson JW, Webb JC, Westfall GD, Wetzler A, Whitten C, Wieman H, Wissink SW, Witt R, Wood J, Wu J, Xu N, Xu Z, Xu ZZ, Yamamoto E, Yepes P, Yurevich VI, Zborovsky I, Zhang H, Zhang WM, Zhang Y, Zhang ZP, Zhong C, Zoulkarneev R, Zoulkarneeva Y, Zubarev AN, Zuo JX. Multistrange Baryon elliptic flow in Au+Au collisions at square root of sNN=200 GeV. PHYSICAL REVIEW LETTERS 2005; 95:122301. [PMID: 16197068 DOI: 10.1103/physrevlett.95.122301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2005] [Indexed: 05/04/2023]
Abstract
We report on the first measurement of elliptic flow v2(pT) of multistrange baryons Xi- +Xi+ and Omega- + Omega+ in heavy-ion collisions. In minimum-bias Au+Au collisions at square root of s(NN)=200 GeV, a significant amount of elliptic flow, comparable to other nonstrange baryons, is observed for multistrange baryons which are expected to be particularly sensitive to the dynamics of the partonic stage of heavy-ion collisions. The pT dependence of v2 of the multistrange baryons confirms the number of constituent quark scaling previously observed for lighter hadrons. These results support the idea that a substantial fraction of the observed collective motion is developed at the early partonic stage in ultrarelativistic nuclear collisions at the Relativistic Heavy Ion Collider.
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Gianinazzi C, Schild M, Müller N, Leib SL, Simon F, Nuñez S, Joss P, Gottstein B. Organotypic slice cultures from rat brain tissue: a new approach forNaegleria fowleriCNS infectionin vitro. Parasitology 2005; 131:797-804. [PMID: 16336733 DOI: 10.1017/s0031182005008619] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Revised: 06/09/2005] [Accepted: 06/13/2005] [Indexed: 11/06/2022]
Abstract
The free-living amoebaNaegleria fowleriis the aetiological agent of primary amoebic meningoencephalitis (PAM), a disease leading to death in the vast majority of cases. In patients suffering from PAM, and in corresponding animal models, the brain undergoes a massive inflammatory response, followed by haemorrhage and severe tissue necrosis. Both,in vivoandin vitromodels are currently being used to study PAM infection. However, animal models may pose ethical issues, are dependent upon availability of specific infrastructural facilities, and are time-consuming and costly. Conversely, cell cultures lack the complex organ-specific morphology foundin vivo, and thus, findings obtainedin vitrodo not necessarily reflect the situationin vivo. The present study reports infection of organotypic slice cultures from rat brain withN. fowleriand compares the findings in this culture system within vivoinfection in a rat model of PAM, that proved complementary to that of mice. We found that brain morphology, as presentin vivo, is well retained in organotypic slice cultures, and that infection time-course including tissue damage parallels the observationsin vivoin the rat. Therefore, organotypic slice cultures from rat brain offer a newin vitroapproach to studyN. fowleriinfection in the context of PAM.
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318
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Rapp C, Imbert P, Fabre R, Simon F, Debord T. [Malaria and false positive serology for HIV]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2005; 65:397-8. [PMID: 16548501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
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319
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Simon F, Kukovecz Á, Kónya Z, Pfeiffer R, Kuzmany H. Highly perfect inner tubes in CVD grown double-wall carbon nanotubes. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.08.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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320
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Adams J, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Arkhipkin D, Averichev GS, Badyal SK, Bai Y, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellingeri-Laurikainen A, Bellwied R, Berger J, Bezverkhny BI, Bhardwaj S, Bhasin A, Bhati AK, Bichsel H, Bielcik J, Bielcikova J, Billmeier A, Bland LC, Blyth CO, Blyth S, Bonner BE, Botje M, Boucham A, Bouchet J, Brandin AV, Bravar A, Bystersky M, Cadman RV, Cai XZ, Caines H, de la Barca Sánchez MC, Castillo J, Catu O, Cebra D, Chajecki Z, Chaloupka P, Chattopadhyay S, Chen HF, Chen Y, Cheng J, Cherney M, Chikanian A, Christie W, Coffin JP, Cormier TM, Cosentino MR, Cramer JG, Crawford HJ, Das D, Das S, de Moura MM, Dedovich TG, Derevschikov AA, Didenko L, Dietel T, Dogra SM, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Mazumdar MRD, Eckardt V, Edwards WR, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faivre J, Fatemi R, Fedorisin J, Filimonov K, Filip P, Finch E, Fine V, Fisyak Y, Fornazier KSF, Fu J, Gagliardi CA, Gaillard L, Gans J, Ganti MS, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Gos H, Grachov O, Grebenyuk O, Grosnick D, Guertin SM, Guo Y, Gupta A, Gutierrez TD, Hallman TJ, Hamed A, Hardtke D, Harris JW, Heinz M, Henry TW, Hepplemann S, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horner M, Huang HZ, Huang SL, Hughes EW, Humanic TJ, Igo G, Ishihara A, Jacobs P, Jacobs WW, Jedynak M, Jiang H, Jones PG, Judd EG, Kabana S, Kang K, Kaplan M, Keane D, Kechechyan A, Khodyrev VY, Kiryluk J, Kisiel A, Kislov EM, Klay J, Klein SR, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kowalik KL, Kramer M, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kulikov AI, Kumar A, Kutuev RK, Kuznetsov AA, Lamont MAC, Landgraf JM, Lange S, Laue F, Lauret J, Lebedev A, Lednicky R, Lehocka S, Levine MJ, Li C, Li Q, Li Y, Lin G, Lindenbaum SJ, Lisa MA, Liu F, Liu H, Liu J, Liu L, Liu QJ, Liu Z, Ljubicic T, Llope WJ, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lu Y, Ludlam T, Lynn D, Ma GL, Ma JG, Ma YG, Magestro D, Mahajan S, Mahapatra DP, Majka R, Mangotra LK, Manweiler R, Margetis S, Markert C, Martin L, Marx JN, Matis HS, Matulenko YA, McClain CJ, McShane TS, Meissner F, Melnick Y, Meschanin A, Miller ML, Minaev NG, Mironov C, Mischke A, Mishra DK, Mitchell J, Mohanty B, Molnar L, Moore CF, Morozov DA, Munhoz MG, Nandi BK, Nayak SK, Nayak TK, Nelson JM, Netrakanti PK, Nikitin VA, Nogach LV, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Pal SK, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Peitzmann T, Perevoztchikov V, Perkins C, Peryt W, Petrov VA, Phatak SC, Picha R, Planinic M, Pluta J, Porile N, Porter J, Poskanzer AM, Potekhin M, Potrebenikova E, Potukuchi BVKS, Prindle D, Pruneau C, Putschke J, Rakness G, Raniwala R, Raniwala S, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Reinnarth J, Renault G, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Rose A, Roy C, Ruan L, Russcher MJ, Sahoo R, Sakrejda I, Salur S, Sandweiss J, Sarsour M, Savin I, Sazhin PS, Schambach J, Scharenberg RP, Schmitz N, Schweda K, Seger J, Seyboth P, Shahaliev E, Shao M, Shao W, Sharma M, Shen WQ, Shestermanov KE, Shimanskiy SS, Sichtermann E, Simon F, Singaraju RN, Smirnov N, Snellings R, Sood G, Sorensen P, Sowinski J, Speltz J, Spinka HM, Srivastava B, Stadnik A, Stanislaus TDS, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Suaide AAP, Sugarbaker E, Suire C, Sumbera M, Surrow B, Swanger M, Symons TJM, de Toledo AS, Tai A, Takahashi J, Tang AH, Tarnowsky T, Thein D, Thomas JH, Timoshenko S, Tokarev M, Trainor TA, Trentalange S, Tribble RE, Tsai OD, Ulery J, Ullrich T, Underwood DG, Buren GV, van Leeuwen M, Molen AMV, Varma R, Vasilevski IM, Vasiliev AN, Vernet R, Vigdor SE, Viyogi YP, Vokal S, Voloshin SA, Waggoner WT, Wang F, Wang G, Wang G, Wang XL, Wang Y, Wang Y, Wang ZM, Ward H, Watson JW, Webb JC, Westfall GD, Wetzler A, Whitten C, Wieman H, Wissink SW, Witt R, Wood J, Wu J, Xu N, Xu Z, Xu ZZ, Yamamoto E, Yepes P, Yurevich VI, Zborovsky I, Zhang H, Zhang WM, Zhang Y, Zhang ZP, Zoulkarneev R, Zoulkarneeva Y, Zubarev AN. Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at square root of (S(NN)) = 62.4 GeV. PHYSICAL REVIEW LETTERS 2005; 95:062301. [PMID: 16090941 DOI: 10.1103/physrevlett.95.062301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2005] [Revised: 04/12/2005] [Indexed: 05/03/2023]
Abstract
We present the first measurement of pseudorapidity distribution of photons in the region 2.3 < or = eta < or = 3.7 for different centralities in Au+Au collisions at square root of (S(NN)) = 62.4 GeV. We find that the photon yield scales with the number of participating nucleons at all collision centralities studied. The pseudorapidity distribution of photons, dominated by pi0 decays, has been compared to those of charged pions, photons, and inclusive charged particles from heavy-ion and nucleon-nucleon collisions at various energies. The photon production has been shown to be consistent with the energy and centrality independent limiting fragmentation scenario.
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321
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Simon F, Lopez-Abente G, Ballester E, Martinez F. Mortality in Spain during the heat waves of summer 2003. Euro Surveill 2005; 10:9-10. [DOI: 10.2807/esm.10.07.00555-en] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The effect of the elevated temperatures on mortality experienced in Europe during the summer of 2003 was observed in several countries. This study, carried out in Spain, describes mortality between 1 June and 31 August and evaluates the effect of the heat wave on mortality.
Observed deaths were obtained from official death registers from 50 provincial capitals. Observed deaths were compared with the expected number, estimated by applying a Poisson regression model to historical mortality series and adjusting for the upward trend and seasonality observed. Meteorological information was provided by the Instituto Nacional de Meteorología (National Institute of Meteorology).
Spain experienced three heat waves in 2003. The total associated excess deaths were 8% (43 212 observed deaths compared with 40 046 expected deaths). Excess deaths were only observed in those aged 75 years and over (15% more deaths than expected for the age group 75 to 84 and 29% for those aged 85 or over). This phenomenon (heat-associated excess mortality) is an emerging public health problem because of its increasing attributable risk, the aging of the Spanish population and its forecasted increasing frequency due to global warming. The implementation of alert and response systems based on monitoring of climate-related risks, emergency room activity and mortality, and strengthening the response capacity of the social and health services should be considered.
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322
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Simon F, Kramberger C, Pfeiffer R, Kuzmany H, Zólyomi V, Kürti J, Singer PM, Alloul H. Isotope engineering of carbon nanotube systems. PHYSICAL REVIEW LETTERS 2005; 95:017401. [PMID: 16090655 DOI: 10.1103/physrevlett.95.017401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Indexed: 05/03/2023]
Abstract
The synthesis of a unique isotope engineered system, double-wall carbon nanotubes with natural carbon outer and highly 13C enriched inner walls, is reported from isotope enriched fullerenes encapsulated in single-wall carbon nanotubes (SWCNTs). The material allows the observation of the D line of the highly defect-free inner tubes that can be related to a curvature induced enhancement of the electron-phonon coupling. Ab initio calculations explain the inhomogeneous broadening of inner tube Raman modes due to the distribution of different isotopes. Nuclear magnetic resonance shows a significant contrast of the isotope enriched inner SWCNTs compared to other carbon phases and provides a macroscopic measure of the inner tube mass content. The high curvature of the small diameter inner tubes manifests in an increased distribution of the chemical shift tensor components.
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323
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Simon F, Fülöp F, Rockenbauer A, Korecz L, Kuzmany H. Highly 13C isotope enriched azafullerene, C59N, for nuclear spin labelling. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.01.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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324
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Adams J, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Arkhipkin D, Averichev GS, Badyal SK, Bai Y, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bezverkhny BI, Bharadwaj S, Bhasin A, Bhati AK, Bhatia VS, Bichsel H, Billmeier A, Bland LC, Blyth CO, Bonner BE, Botje M, Boucham A, Brandin AV, Bravar A, Bystersky M, Cadman RV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Castillo J, Cebra D, Chajecki Z, Chaloupka P, Chattopadhyay S, Chen HF, Chen Y, Cheng J, Cherney M, Chikanian A, Christie W, Coffin JP, Cormier TM, Cramer JG, Crawford HJ, Das D, Das S, de Moura MM, Derevschikov AA, Didenko L, Dietel T, Dogra SM, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Dutta Mazumdar MR, Eckardt V, Edwards WR, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faivre J, Fatemi R, Fedorisin J, Filimonov K, Filip P, Finch E, Fine V, Fisyak Y, Fomenko K, Fu J, Gagliardi CA, Gaillard L, Gans J, Ganti MS, Gaudichet L, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Grachov O, Grebenyuk O, Grosnick D, Guertin SM, Guo Y, Gupta A, Gutierrez TD, Hallman TJ, Hamed A, Hardtke D, Harris JW, Heinz M, Henry TW, Hepplemann S, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Huang HZ, Huang SL, Hughes EW, Humanic TJ, Igo G, Ishihara A, Jacobs P, Jacobs WW, Janik M, Jiang H, Jones PG, Judd EG, Kabana S, Kang K, Kaplan M, Keane D, Khodyrev VY, Kiryluk J, Kisiel A, Kislov EM, Klay J, Klein SR, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kramer M, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kulikov AI, Kumar A, Kutuev RK, Kuznetsov AA, Lamont MAC, Landgraf JM, Lange S, Laue F, Lauret J, Lebedev A, Lednicky R, Lehocka S, LeVine MJ, Li C, Li Q, Li Y, Lin G, Lindenbaum SJ, Lisa MA, Liu F, Liu L, Liu QJ, Liu Z, Ljubicic T, Llope WJ, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lu Y, Ludlam T, Lynn D, Ma GL, Ma JG, Ma YG, Magestro D, Mahajan S, Mahapatra DP, Majka R, Mangotra LK, Manweiler R, Margetis S, Markert C, Martin L, Marx JN, Matis HS, Matulenko YA, McClain CJ, McShane TS, Meissner F, Melnick Y, Meschanin A, Miller ML, Minaev NG, Mironov C, Mischke A, Mishra DK, Mitchell J, Mohanty B, Molnar L, Moore CF, Morozov DA, Munhoz MG, Nandi BK, Nayak SK, Nayak TK, Nelson JM, Netrakanti PK, Nikitin VA, Nogach LV, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Pal SK, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Peitzmann T, Perevoztchikov V, Perkins C, Peryt W, Petrov VA, Phatak SC, Picha R, Planinic M, Pluta J, Porile N, Porter J, Poskanzer AM, Potekhin M, Potrebenikova E, Potukuchi BVKS, Prindle D, Pruneau C, Putschke J, Rakness G, Raniwala R, Raniwala S, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Renault G, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Rose A, Roy C, Ruan L, Sahoo R, Sakrejda I, Salur S, Sandweiss J, Sarsour M, Savin I, Sazhin PS, Schambach J, Scharenberg RP, Schmitz N, Schweda K, Seger J, Seyboth P, Shahaliev E, Shao M, Shao W, Sharma M, Shen WQ, Shestermanov KE, Shimanskiy SS, Sichtermann E, Simon F, Singaraju RN, Skoro G, Smirnov N, Snellings R, Sood G, Sorensen P, Sowinski J, Speltz J, Spinka HM, Srivastava B, Stadnik A, Stanislaus TDS, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Suaide AAP, Sugarbaker E, Suire C, Sumbera M, Surrow B, Symons TJM, Szanto de Toledo A, Szarwas P, Tai A, Takahashi J, Tang AH, Tarnowsky T, Thein D, Thomas JH, Timoshenko S, Tokarev M, Trainor TA, Trentalange S, Tribble RE, Tsai OD, Ulery J, Ullrich T, Underwood DG, Urkinbaev A, Van Buren G, van Leeuwen M, Vander Molen AM, Varma R, Vasilevski IM, Vasiliev AN, Vernet R, Vigdor SE, Viyogi YP, Vokal S, Voloshin SA, Vznuzdaev M, Waggoner WT, Wang F, Wang G, Wang G, Wang XL, Wang Y, Wang Y, Wang ZM, Ward H, Watson JW, Webb JC, Wells R, Westfall GD, Wetzler A, Whitten C, Wieman H, Wissink SW, Witt R, Wood J, Wu J, Xu N, Xu Z, Xu ZZ, Yamamoto E, Yepes P, Yurevich VI, Zanevsky YV, Zhang H, Zhang WM, Zhang ZP, Zoulkarneev R, Zoulkarneeva Y, Zubarev AN. Open charm yields in d+Au collisions at squareroot[sNN]=200 GeV. PHYSICAL REVIEW LETTERS 2005; 94:062301. [PMID: 15783724 DOI: 10.1103/physrevlett.94.062301] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Indexed: 05/24/2023]
Abstract
Midrapidity open charm spectra from direct reconstruction of D0(D0)-->K-/+pi+/- in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at squareroot[sNN]=200 GeV are reported. The D0(D0) spectrum covers a transverse momentum (pT) range of 0.1<pT<3 GeV/c, whereas the electron spectra cover a range of 1<pT<4 GeV/c. The electron spectra show approximate binary collision scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon binary interaction at midrapidity for open charm production from d+Au collisions at BNL RHIC is dsigma(NN)cc/dy=0.30+/-0.04(stat)+/-0.09(syst) mb. The results are compared to theoretical calculations. Implications for charmonium results in A+A collisions are discussed.
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Rockenbauer A, Csányi G, Fülöp F, Garaj S, Korecz L, Lukács R, Simon F, Forró L, Pekker S, Jánossy A. Electron delocalization and dimerization in solid C59N doped C60 fullerene. PHYSICAL REVIEW LETTERS 2005; 94:066603. [PMID: 15783762 DOI: 10.1103/physrevlett.94.066603] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2004] [Indexed: 05/24/2023]
Abstract
Electron spin resonance and ab initio electronic structure calculations show an intricate relation between molecular rotation and chemical bonding in the dilute solid solution. The unpaired electron of C59N is delocalized over several C60 molecules above 700 K, while at lower temperatures it remains localized within short range. The data suggest that below 350 K rigid C59N-C60 heterodimers are formed in thermodynamic equilibrium with dissociated rotating molecules. The structural fluctuations between heterodimers and dissociated molecules are accompanied by simultaneous electron spin transfer between C60 and C59N molecules. The calculation confirms that in the C59N-C60 heterodimer the spin density resides mostly on the C60 moiety, while it is almost entirely on C59N in the dissociated case.
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