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Tzvetkov ΝT, Neumann B, Stammler HG, Mattay J. Crystal structure of(7a' SR)-7a'-prop-2-ynyl-1',2',4',6',7',7 a-hexahydrospiro[1,3-dioxolan-2,5'-indene],C14H18O2. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.221.14.479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bader J, Neumann B, Schwab K, Popovic M, Scheler C, Bajpai R. α-Amylase Production in Fed-Batch Cultivation ofBacillus caldolyticus. CHEM-ING-TECH 2005. [DOI: 10.1002/cite.200590158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Weber L, Rausch A, Stammler HG, Neumann B. Chirale 1,3,2-Oxazaborolidine aus chiralen 2,3-Dihydro-1H-1,3,2-diazaborolen und Diphenylketen. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200500054] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sönnichsen B, Koski LB, Walsh A, Marschall P, Neumann B, Brehm M, Alleaume AM, Artelt J, Bettencourt P, Cassin E, Hewitson M, Holz C, Khan M, Lazik S, Martin C, Nitzsche B, Ruer M, Stamford J, Winzi M, Heinkel R, Röder M, Finell J, Häntsch H, Jones SJM, Jones M, Piano F, Gunsalus KC, Oegema K, Gönczy P, Coulson A, Hyman AA, Echeverri CJ. Full-genome RNAi profiling of early embryogenesis in Caenorhabditis elegans. Nature 2005; 434:462-9. [PMID: 15791247 DOI: 10.1038/nature03353] [Citation(s) in RCA: 673] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2004] [Accepted: 01/10/2005] [Indexed: 11/09/2022]
Abstract
A key challenge of functional genomics today is to generate well-annotated data sets that can be interpreted across different platforms and technologies. Large-scale functional genomics data often fail to connect to standard experimental approaches of gene characterization in individual laboratories. Furthermore, a lack of universal annotation standards for phenotypic data sets makes it difficult to compare different screening approaches. Here we address this problem in a screen designed to identify all genes required for the first two rounds of cell division in the Caenorhabditis elegans embryo. We used RNA-mediated interference to target 98% of all genes predicted in the C. elegans genome in combination with differential interference contrast time-lapse microscopy. Through systematic annotation of the resulting movies, we developed a phenotypic profiling system, which shows high correlation with cellular processes and biochemical pathways, thus enabling us to predict new functions for previously uncharacterized genes.
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Langner J, Neumann B, Goodman SL, Pawlita M. RGD-mutants of B-lymphotropic polyomavirus capsids specifically bind to alpha(v)beta3 integrin. Arch Virol 2005; 149:1877-96. [PMID: 15290355 DOI: 10.1007/s00705-004-0374-z] [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: 10/26/2022]
Abstract
Integrins are a family of cell surface proteins that function as receptors for extracellular matrix ligands and for some viruses. A subset of integrins recognises peptide sequences containing arginine-glycine-aspartic acid (RGD) motifs as ligands. The B-lymphotropic polyomavirus (LPV) has a non-enveloped capsid that recognises a sialylated cell surface receptor. To change the receptor binding specificity we have replaced sets of three amino acids in three predicted surface loops of the major capsid protein VP1 of the B-lymphotropic polyomavirus LPV by RGD. Ten mutants gave rise to the expected 40 kDa VP1 protein upon expression from a baculovirus vector in insect cells. Five of the VP1 mutants representing all three surface loops have retained the ability to spontaneously assemble to capsids in the nuclei of the insect cells. Structural changes of the mutant capsid surface were shown by differential reactivity with a set of 7 neutralising monoclonal antibodies that recognise conformational surface epitopes of wildtype LPV virions. In addition all mutant capsids had lost specific binding to the LPV receptor. Three mutant capsids of one loop (BC) showed specific binding to alpha(v)beta3 integrin but not to integrins alpha(v)beta5, alpha(v)beta6, or to alpha(IIb)beta3 known also to recognise RGD containing peptide sequences. This selective binding of the mutant capsids could be inhibited by synthetic peptides that specifically bind to alpha(v)beta3 integrin with IC50 values between 10 and 40 nM.
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Arsene I, Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Ito H, Jipa A, Jørdre JI, Jundt F, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Lindal S, Lystad R, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Neumann B, Nielsen BS, Ouerdane D, Płaneta R, Rami F, Ristea C, Ristea O, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Sheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS. Centrality dependence of charged-particle pseudorapidity distributions from d + Au collisions at sqrt[sNN] = 200 GeV. PHYSICAL REVIEW LETTERS 2005; 94:032301. [PMID: 15698255 DOI: 10.1103/physrevlett.94.032301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Indexed: 05/24/2023]
Abstract
Charged-particle pseudorapidity densities are presented for the d + Au reaction at sqrt[s(NN)] = 200 GeV with -4.2 < or = eta < or = 4.2. The results, from the BRAHMS experiment at BNL Relativistic Heavy-Ion Collider, are shown for minimum-bias events and 0%-30%, 30%-60%, and 60%-80% centrality classes. Models incorporating both soft physics and hard, perturbative QCD-based scattering physics agree well with the experimental results. The data do not support predictions based on strong-coupling, semiclassical QCD. In the deuteron-fragmentation region the central 200 GeV data show behavior similar to full-overlap d+Au results at sqrt[s(NN)] = 19.4 GeV.
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Arsene I, Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Ito H, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Lindal S, Lystad R, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Neumann B, Nielsen BS, Ouerdane D, Płaneta R, Rami F, Ristea C, Ristea O, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Scheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS. Evolution of the nuclear modification factors with rapidity and centrality in d + Au collisions at (sqrt)[N(S)N]=200 GeV. PHYSICAL REVIEW LETTERS 2004; 93:242303. [PMID: 15697798 DOI: 10.1103/physrevlett.93.242303] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2004] [Revised: 08/27/2004] [Indexed: 05/24/2023]
Abstract
We report on a study of the transverse momentum dependence of nuclear modification factors R(dAu) for charged hadrons produced in deuteron + gold collisions at sqrt[s(NN)]=200 GeV, as a function of collision centrality and of the pseudorapidity (eta=0, 1, 2.2, 3.2) of the produced hadrons. We find a significant and systematic decrease of R(dAu) with increasing rapidity. The midrapidity enhancement and the forward rapidity suppression are more pronounced in central collisions relative to peripheral collisions. These results are relevant to the study of the possible onset of gluon saturation at energies reached at BNL RHIC.
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Weber L, Rausch A, Stammler HG, Neumann B. Synthese und Struktur hochfunktionalisierter 2, 3-Dihydro-1H-1, 3, 2-diazaborole. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400295] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Neumann B, Kröger C, Haebler H. Über die Bildungswärmen der Nitride. I. Mangannitrid und Chromnitrid. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19311960110] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Neumann B, Kröger C, Kunz H. Die Bildungswärmen der Nitride. V. Die Verbrennungswärmen einiger Metalle und Metallnitride. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19342180407] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Neumann B, Kröger C, Kunz H. Über die Bildungswärmen der Nitride. III. Die Lösungswärmen einiger Metalle und Metallnitride in Säuren. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19322070203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Neumann B, Kröger C, Haebler H. Über die Bildungswärmen der Nitride. IV. Uran-, Thor- und Lanthannitrid. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19322070204] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Neumann B, Kröger C, Haebler H. Die Bildungswärmen der Nitride. Die Azotierungswärmen von Lithium, Aluminium, Beryllium und Magnesium. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19322040111] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Popovic M, Scheler C, Neumann B. Einsatz von 2D-Gelelektrophorese zum besseren Verständnis der Vorgänge während einer rekombinanten Hochzelldichte-Kultivierung. CHEM-ING-TECH 2004. [DOI: 10.1002/cite.200490103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Arsene I, Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Hansen O, Holm A, Ito H, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Lindal S, Lystad G, Løvhøiden G, Majka Z, Makeev A, McBreen B, Mikelsen M, Murray M, Natowitz J, Neumann B, Nielsen BS, Norris J, Ouerdane D, Płaneta R, Rami F, Ristea C, Ristea O, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Scheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS. Transverse-momentum spectra in Au+Au and d+Au collisions at sqrt[s(NN)]=200 GeV and the pseudorapidity dependence of high-p(T) suppression. PHYSICAL REVIEW LETTERS 2003; 91:072305. [PMID: 12935010 DOI: 10.1103/physrevlett.91.072305] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2003] [Indexed: 05/24/2023]
Abstract
We present spectra of charged hadrons from Au+Au and d+Au collisions at sqrt[s(NN)]=200 GeV measured with the BRAHMS experiment at RHIC. The spectra for different collision centralities are compared to spectra from p+(-)p collisions at the same energy scaled by the number of binary collisions. The resulting ratios (nuclear modification factors) for central Au+Au collisions at eta=0 and eta=2.2 evidence a strong suppression in the high p(T) region (>2 GeV/c). In contrast, the d+Au nuclear modification factor (at eta=0) exhibits an enhancement of the high p(T) yields. These measurements indicate a high energy loss of the high p(T) particles in the medium created in the central Au+Au collisions. The lack of suppression in d+Au collisions makes it unlikely that initial state effects can explain the suppression in the central Au+Au collisions.
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Siemeling U, Kölling L, Kuhnert O, Neumann B, Stammler A, Stammler H, Fink G, Kaminski E, Kiefer A, Schrock RR. Z Anorg Allg Chem 2003; 629:781-792. [DOI: 10.1002/zaac.200390140] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Berlekamp U, Mix A, Neumann B, Stammler HG, Jutzi P. 2-(Dimethylphosphinomethyl)- and 2-(methylthiomethyl)phenyl silicon compounds: higher coordination with soft donors. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(02)02164-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Aveyard R, Binks BP, Clint JH, Fletcher PDI, Horozov TS, Neumann B, Paunov VN, Annesley J, Botchway SW, Nees D, Parker AW, Ward AD, Burgess AN. Measurement of long-range repulsive forces between charged particles at an oil-water interface. PHYSICAL REVIEW LETTERS 2002; 88:246102. [PMID: 12059318 DOI: 10.1103/physrevlett.88.246102] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2001] [Indexed: 05/21/2023]
Abstract
Using a laser tweezers method, we have determined the long-range repulsive force as a function of separation between two charged, spherical polystyrene particles (2.7 microm diameter) present at a nonpolar oil-water interface. At large separations (6 to 12 microm between particle centers) the force is found to decay with distance to the power -4 and is insensitive to the ionic strength of the aqueous phase. The results are consistent with a model in which the repulsion arises primarily from the presence of a very small residual electric charge at the particle-oil interface. This charge corresponds to a fractional dissociation of the total ionizable (sulfate) groups present at the particle-oil surface of approximately 3 x 10(-4).
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Jutzi P, Becker A, Stammler HG, Neumann B. Synthesis and solid-state structure of (Me3Si)3CGeCH(SiMe3)2, a monomeric dialkylgermylene. Organometallics 2002. [DOI: 10.1021/om00052a002] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Neumann B, Mueller SC, Hauser MJB, Steinbock O, Simoyi RH, Dalal NS. Identification and Kinetic Study of the Peroxymalonyl Radical in the Aerobic Oxidation of Malonic Acid by Cerium(IV). J Am Chem Soc 2002. [DOI: 10.1021/ja00128a033] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jutzi P, Becker A, Leue C, Stammler HG, Neumann B, Hursthouse MB, Karaulov A. [Tris(trimethylsilyl)methyl]- and (2,4,6-tri-tert-butylphenyl)(pentamethylcyclopentadienyl)germylene: synthesis and structure. Organometallics 2002. [DOI: 10.1021/om00057a012] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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72
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Sagowski C, Wenzel S, Neumann B, Kehrl W, Zywietz F, Roeser K, Ussmüller J. [Radioprotective effectiveness of amifostine on the salivary glands of the rat during fractionated irradiation]. HNO 2002; 50:139-45. [PMID: 12080624 DOI: 10.1007/s001060100536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND The aim of this study was to evaluate the cytoprotective potency of amifostine during a fractioned irradiation of salivary glands but also on the tumor response of rhabdomyosarcomas R1H in rats. METHOD The head-neck-area of male WAG/RijH rats and the tumor in the flank were irradiated with 60Co-gamma-rays (60 Gy/30 f/6 weeks). Amifostine (250 mg/m2) was applicated 15 min before irradiation. The control group was treated with an equal volume of physiologic sodium chloride. The salivary glands were exstirpated and examined histopathologically. Tumour volume was measured, the body-weight of rats determined. RESULTS A dose dependent radiosialadenitis developed in all salivary glands. Amifostine had no influence on the response of R1H tumours to radiation. The animal weight loss in the amifostine group was higher as compared to control group. CONCLUSIONS No cytoprotective effects on acute toxicity of salivary glands of rats could be detected under irradiation with synchronous application of amifostine. In addition, no effects on tumor response were observed. The general animal constitution decreased by additional medication of amifostine.
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Weber L, Pumpenmeier L, Stammler H, Neumann B, Lönnecke P. Synthesis, structure and reactivity of highly functionalized arsanyl- and stibanyl-diazomethanes. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(01)01124-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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74
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Weber L, Meyer M, Stammler HG, Neumann B. Reactivity of the inversely polarized phosphaalkenes RP=C(NMe2)2 (R = tBu, Me3Si, H) towards arylcarbene complexes [(CO)5M=C(oEt)Ar] (Ar= Ph, M = Cr, W; Ar = 2-MeC6H4, 2-MeOC6H4, M = W). Chemistry 2001; 7:5401-8. [PMID: 11822440 DOI: 10.1002/1521-3765(20011217)7:24<5401::aid-chem5401>3.0.co;2-d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The reaction of the arylated Fischer carbene complexes [(CO)5M=C(OEt)Ar] (Ar=Ph; M = Cr, W; 2-MeC6H4; 2-MeOC6H; M = W) with the phosphaalkenes RP=C(NMe2), (R=tBu, SiMe3) afforded the novel phosphaalkene complexes [[RP=C(OEt)Ar]M(CO)5] in addition to the compounds [(RP=C(NMe2)2]M(CO)5]. Only in the case of the R = SiMe3 (E/Z) mixtures of the metathesis products were obtained. The bis(dimethylamino)methylene unit of the phosphaalkene precursor was incorporated in olefins of the type (Me2N)2C=C(OEt)(Ar). Treatment of [(CO)5W=C(OEt)(2-MeOC6H4)] with HP=C(NMe2)2 gave rise to the formation of an E/Z mixture of [[(Me2N)2CH-P=C(OEt)(2-MeOC6H4)]W(CO)5] the organophosphorus ligand of which formally results from a combination of the carbene ligand and the phosphanediyl [P-CH(NMe2)2]. The reactions reported here strongly depend on an inverse distribution of alpha-electron density in the phosphaalkene precursors (Pdelta Cdelta+), which renders these molecules powerfu] nucleophiles.
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Weber L, Wartig HB, Stammler HG, Neumann B. Synthese und Reaktivität von 2-Brom-1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborol Molekülstruktur von Bis(1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborol-2-yl). Z Anorg Allg Chem 2001. [DOI: 10.1002/1521-3749(200112)627:12<2663::aid-zaac2663>3.0.co;2-o] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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