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  • 1
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    GP38-targeting monoclonal antibodies protect adult mice against lethal Crimean-Congo hemorrhagic fever virus infection (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Crimean-Congo hemorrhagic fever virus (CCHFV) is an important human pathogen. Limited evidence suggests that antibodies can protect humans against lethal CCHFV disease but the protective efficacy of antibodies has never been evaluated in adult animal models. Here, we used adult mice to investigate the protection provided against CCHFV infection by glycoprotein-targeting neutralizing and non-neutralizing monoclonal antibodies (mAbs). We identified a single non-neutralizing antibody (mAb-13G8) that protected adult type I interferon–deficient mice 〉90% when treatment was initiated before virus exposure and 〉60% when administered after virus exposure. Neutralizing antibodies known to protect neonatal mice from lethal CCHFV infection failed to confer protection regardless of immunoglobulin G subclass. The target of mAb-13G8 was identified as GP38, one of multiple proteolytically cleaved glycoproteins derived from the CCHFV glycoprotein precursor polyprotein. This study reveals GP38 as an important antibody target for limiting CCHFV pathogenesis and lays the foundation to develop immunotherapeutics against CCHFV in humans.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Conservation conflicts across Africa (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-03
    Description: There is increasing evidence that areas of outstanding conservation importance may coincide with dense human settlement or impact. We tested the generality of these findings using 1 degree-resolution data for sub-Saharan Africa. We find that human population density is positively correlated with species richness of birds, mammals, snakes, and amphibians. This association holds for widespread, narrowly endemic, and threatened species and looks set to persist in the face of foreseeable population growth. Our results contradict earlier expectations of low conflict based on the idea that species richness decreases and human impact increases with primary productivity. We find that across Africa, both variables instead exhibit unimodal relationships with productivity. Modifying priority-setting to take account of human density shows that, at this scale, conflicts between conservation and development are not easily avoided, because many densely inhabited grid cells contain species found nowhere else.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balmford, A -- Moore, J L -- Brooks, T -- Burgess, N -- Hansen, L A -- Williams, P -- Rahbek, C -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2616-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Conservation Biology Group, Department of Zoology, University of Cambridge, Downing Street, Cambridge, CB2 3EJ, UK. a.balmford@zoo.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11283376" target="_blank"〉PubMed〈/a〉
    Keywords: Africa South of the Sahara ; Amphibians ; Animals ; Birds ; *Conservation of Natural Resources ; *Ecosystem ; Humans ; Mammals ; Population Density ; Population Growth ; Snakes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Cell-to-cell communication across the prokaryote-eukaryote boundary (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-11-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Joint, Ian -- Tait, Karen -- Callow, Maureen E -- Callow, James A -- Milton, Debra -- Williams, Paul -- Camara, Miguel -- New York, N.Y. -- Science. 2002 Nov 8;298(5596):1207.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plymouth Marine Laboratory, Prospect Place, Plymouth, PL1 3DH, UK. I.Joint@pml.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12424372" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Butyrolactone/*analogs & derivatives/*metabolism ; Bacterial Proteins/genetics/metabolism ; *Biofilms ; Cell Adhesion ; Cell Communication ; Chemotaxis ; Chlorophyta/*physiology ; Escherichia coli/genetics/metabolism/*physiology ; Hydrogen-Ion Concentration ; Mutation ; Spores/physiology ; *Transcription Factors ; Vibrio/genetics/metabolism/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Dielectrophoretic assembly of electrically functional microwires from nanoparticle suspensions (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: A new class of microwires can be assembled by dielectrophoresis from suspensions of metallic nanoparticles. The wires are formed in the gaps between planar electrodes and can grow faster than 50 micrometers per second to lengths exceeding 5 millimeters. They have good ohmic conductance and automatically form electrical connections to conductive islands or particles. The thickness and the fractal dimension of the wires can be controlled, and composite wires with a metallic core surrounded by a latex shell can be assembled. The simple assembly process and their high surface-to-volume ratio make these structures promising for wet electronic and bioelectronic circuits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hermanson, K D -- Lumsdon, S O -- Williams, J P -- Kaler, E W -- Velev, O D -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1082-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691987" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    The human nuclear xenobiotic receptor PXR: structural determinants of directed promiscuity (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-16
    Description: The human nuclear pregnane X receptor (hPXR) activates cytochrome P450-3A expression in response to a wide variety of xenobiotics and plays a critical role in mediating dangerous drug-drug interactions. We present the crystal structures of the ligand-binding domain of hPXR both alone and in complex with the cholesterol-lowering drug SR12813 at resolutions of 2.5 and 2.75 angstroms, respectively. The hydrophobic ligand-binding cavity of hPXR contains a small number of polar residues, permitting SR12813 to bind in three distinct orientations. The position and nature of these polar residues were found to be critical for establishing the precise pharmacologic activation profile of PXR. Our findings provide important insights into how hPXR detects xenobiotics and may prove useful in predicting and avoiding drug-drug interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watkins, R E -- Wisely, G B -- Moore, L B -- Collins, J L -- Lambert, M H -- Williams, S P -- Willson, T M -- Kliewer, S A -- Redinbo, M R -- New York, N.Y. -- Science. 2001 Jun 22;292(5525):2329-33. Epub 2001 Jun 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina (UNC) at Chapel Hill, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11408620" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; Diphosphonates/chemistry/*metabolism ; Humans ; Ligands ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptors, Cytoplasmic and Nuclear/*chemistry/*metabolism ; Receptors, Steroid/*chemistry/*metabolism ; Rifampin/metabolism ; Xenobiotics/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Species turnover promotes the importance of bee diversity for crop pollination at regional scales (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-02-16
    Description: Ecologists have shown through hundreds of experiments that ecological communities with more species produce higher levels of essential ecosystem functions such as biomass production, nutrient cycling, and pollination, but whether this finding holds in nature (that is, in large-scale and unmanipulated systems) is controversial. This knowledge gap is troubling because ecosystem services have been widely adopted as a justification for global biodiversity conservation. Here we show that, to provide crop pollination in natural systems, the number of bee species must increase by at least one order of magnitude compared with that in field experiments. This increase is driven by species turnover and its interaction with functional dominance, mechanisms that emerge only at large scales. Our results show that maintaining ecosystem services in nature requires many species, including relatively rare ones.
    Keywords: Ecology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Volatilization of high molecular weight DNA by pulsed laser ablation of frozen aqueous solutions (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-12-22
    Description: DNA has been volatilized by pulsed laser ablation of a thin film of a frozen aqueous DNA solution. The target film was irradiated in vacuum by a pulsed laser at power densities sufficient to ablate the ice matrix. The expanding ablated water vapor entrained embedded DNA molecules and expelled them into the gas phase. Ejection of DNA molecules as large as 410 kilodaltons was verified by collection of the ablation products and subsequent mass analysis by polyacrylamide gel electrophoresis with autoradiographic detection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, R W -- Rainbow, M J -- Lohr, D E -- Williams, P -- CA 00911/CA/NCI NIH HHS/ -- GM 37788/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1989 Dec 22;246(4937):1585-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Arizona State University, Tempe 85287.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2595370" target="_blank"〉PubMed〈/a〉
    Keywords: Autoradiography ; *Dna ; Freezing ; *Lasers ; Molecular Weight ; Phosphorus Radioisotopes ; Plasmids ; Solutions ; Volatilization
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    An RNA polymerase-binding protein that is required for communication between an enhancer and a promoter (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-05-04
    Description: Although bacteriophage T4 late promoters are selectively recognized by Escherichia coli RNA polymerase bearing a single protein encoded by T4 gene 55 (gp55), efficient transcription at these promoters requires enhancement by the three T4 DNA polymerase accessory proteins, bound to distal "mobile enhancer" sites. Two principles are shown to govern this transcriptional enhancement: (i) Promoter recognition and communication between the enhancer and the promoter require separate phage-coded proteins. Only RNA polymerase that has the T4 gene 33 protein (gp33) bound to it is subject to enhancement by the three DNA replication proteins. (ii) Transcriptional enhancement in this prokaryotic system is promoter-specific. Promoter specificity is generated by a direct competition of phage T4 gp33 and gp55 with the E. coli promoter recognition protein, sigma 70, for binding to the E. coli RNA polymerase core. Thus, polymerase that contains sigma 70 is competent to transcribe T4 early and middle genes, but lacks the ability to be enhanced by the DNA replication proteins, while polymerase that contains gp55 and gp33 is capable of enhancement via gp33, but its activity is restricted to T4 late promoters by gp55.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Herendeen, D R -- Williams, K P -- Kassavetis, G A -- Geiduschek, E P -- New York, N.Y. -- Science. 1990 May 4;248(4955):573-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2185541" target="_blank"〉PubMed〈/a〉
    Keywords: Carrier Proteins/isolation & purification/*physiology ; DNA-Directed RNA Polymerases/*metabolism ; *Enhancer Elements, Genetic ; Escherichia coli/enzymology/*genetics ; Kinetics ; Models, Genetic ; *Promoter Regions, Genetic ; T-Phages/*genetics ; *Transcription Factors ; Viral Proteins/isolation & purification/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Direct gene transfer into mouse muscle in vivo (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-03-23
    Description: RNA and DNA expression vectors containing genes for chloramphenicol acetyltransferase, luciferase, and beta-galactosidase were separately injected into mouse skeletal muscle in vivo. Protein expression was readily detected in all cases, and no special delivery system was required for these effects. The extent of expression from both the RNA and DNA constructs was comparable to that obtained from fibroblasts transfected in vitro under optimal conditions. In situ cytochemical staining for beta-galactosidase activity was localized to muscle cells following injection of the beta-galactosidase DNA vector. After injection of the DNA luciferase expression vector, luciferase activity was present in the muscle for at least 2 months.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolff, J A -- Malone, R W -- Williams, P -- Chong, W -- Acsadi, G -- Jani, A -- Felgner, P L -- HD00669-05/HD/NICHD NIH HHS/ -- HD03352/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 23;247(4949 Pt 1):1465-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Waisman Center, University of Wisconsin, Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1690918" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses/genetics ; Beetles/genetics ; Chloramphenicol O-Acetyltransferase/biosynthesis/genetics ; DNA/genetics ; Escherichia coli/genetics ; *Gene Expression ; Genetic Vectors ; Histocytochemistry ; Luciferases/biosynthesis/genetics ; Mice ; Muscles/*enzymology ; RNA/genetics ; *Transfection ; beta-Galactosidase/biosynthesis/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Spectrometry for biology (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, P -- New York, N.Y. -- Science. 1991 Jun 28;252(5014):1865.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17753265" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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