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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-11-13
    Description: Genetic analyses suggested that the opaque-2 (o2) locus in maize acts as a positive, transacting, transcriptional activator of the zein seed storage-protein genes. Because isolation of the gene is requisite to understanding the molecular details of this regulation, transposon mutagenesis with the transposable element suppressor-mutator (Spm) was carried out, and three mutable o2 alleles were obtained. One of these alleles contained an 8.3-kilobase autonomous Spm, another a 6.8-kilobase nonautonomous Spm, and the third an unidentified transposon that is unrelated to Spm. A DNA sequence flanking the autonomous Spm insertion was verified to be o2-specific and provided a probe to clone a wild-type allele. Northern blots indicated that the gene is expressed in wild-type endosperm but not in leaf tissues or in endosperms homozygous for a mutant allele of the O2 gene. A transcript was detected in endosperms homozygous for mutations at opaque-7 and floury-2, an indication that O2 expression is independent of these two other putative regulators of zein synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmidt, R J -- Burr, F A -- Burr, B -- GM31093/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 13;238(4829):960-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, Brookhaven National Laboratory, Upton, NY 11973.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2823388" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Cloning, Molecular ; DNA Restriction Enzymes ; *DNA Transposable Elements ; *Genes, Regulator ; Homozygote ; Mutation ; Nucleic Acid Hybridization ; Plants/*genetics ; Zea mays/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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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2001-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burr, R -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1835-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11398825" target="_blank"〉PubMed〈/a〉
    Keywords: *Biomedical Engineering ; *Diagnostic Imaging ; National Institutes of Health (U.S.)/legislation & jurisprudence/*organization & ; administration ; United States
    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
    Publication Date: 2003-06-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chick, John H -- Maher, Robert J -- Burr, Brooks M -- Thomas, Matthew R -- New York, N.Y. -- Science. 2003 Jun 20;300(5627):1876-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12817125" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquaculture ; Bivalvia ; *Carps/classification ; Conservation of Natural Resources ; *Ecosystem ; Fresh Water ; Illinois
    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
    Publication Date: 2009-12-08
    Description: Phase transformation generally begins with nucleation, in which a small aggregate of atoms organizes into a different structural symmetry. The thermodynamic driving forces and kinetic rates have been predicted by classical nucleation theory, but observation of nanometer-scale nuclei has not been possible, except on exposed surfaces. We used a statistical technique called fluctuation transmission electron microscopy to detect nuclei embedded in a glassy solid, and we used a laser pump-probe technique to determine the role of these nuclei in crystallization. This study provides a convincing proof of the time- and temperature-dependent development of nuclei, information that will play a critical role in the development of advanced materials for phase-change memories.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Bong-Sub -- Burr, Geoffrey W -- Shelby, Robert M -- Raoux, Simone -- Rettner, Charles T -- Bogle, Stephanie N -- Darmawikarta, Kristof -- Bishop, Stephen G -- Abelson, John R -- New York, N.Y. -- Science. 2009 Nov 13;326(5955):980-4. doi: 10.1126/science.1177483.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign (UIUC), Urbana, IL 61801, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965508" 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
    Publication Date: 1993-05-14
    Description: Paired carbon-14 ((14)C) and thorium-230((230)Th) ages were determined on fossil corals from the Huon Peninsula, Papua New Guinea. The ages were used to calibrate part of the (14)C time scale and to estimate rates of sea-level rise during the last deglaciation. An abrupt offset between the (14)C and (230)Th ages suggests that the atmospheric (14)C/(12)C ratio dropped by 15 percent during the latter part of and after the Younger Dryas (YD). This prominent drop coincides with greatly reduced rates of sea-level rise. Reduction of melting because of cooler conditions during the YD may have caused an increase in the rate of ocean ventilation, which caused the atmospheric (14)C/(12)C ratio to fall. The record of sea-level rise also shows that globally averaged rates of melting were relatively high at the beginning of the YD. Thus, these measurements satisfy one of the conditions required by the hypothesis that the diversion of meltwater from the Mississippi to the St. Lawrence River triggered the YD event.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Edwards, R L -- Beck, J W -- Burr, G S -- Donahue, D J -- Chappell, J M -- Bloom, A L -- Druffel, E R -- Taylor, F W -- New York, N.Y. -- Science. 1993 May 14;260(5110):962-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17818386" 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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  • 6
    Publication Date: 2001-05-12
    Description: A long record of atmospheric 14C concentration, from 45 to 11 thousand years ago (ka), was obtained from a stalagmite with thermal-ionization mass-spectrometric 230Th and accelerator mass-spectrometric 14C measurements. This record reveals highly elevated Delta14C between 45 and 33 ka, portions of which may correlate with peaks in cosmogenic 36Cl and 10Be isotopes observed in polar ice cores. Superimposed on this broad peak of Delta14C are several rapid excursions, the largest of which occurs between 44.3 and 43.3 ka. Between 26 and 11 ka, atmospheric Delta14C decreased from approximately 700 to approximately 100 per mil, modulated by numerous minor excursions. Carbon cycle models suggest that the major features of this record cannot be produced with solar or terrestrial magnetic field modulation alone but also require substantial fluctuations in the carbon cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beck, J W -- Richards, D A -- Edwards, R L -- Silverman, B W -- Smart, P L -- Donahue, D J -- Hererra-Osterheld, S -- Burr, G S -- Calsoyas, L -- Jull, A J -- Biddulph, D -- New York, N.Y. -- Science. 2001 Jun 29;292(5526):2453-8. Epub 2001 May 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NSF-Arizona Accelerator Mass Spectrometry Facility, Department of Physics, University of Arizona, Tucson, AZ 85721, USA. wbeck@physics.arizona.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11349137" 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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  • 7
    Publication Date: 1980-11-07
    Description: Two-phase mixtures of gasoline, water, and ethanol were dehydrated with both starch and saponified starch-g-polyacrylonitrile (HSPAN). Whereas starch absorbed ethanol as well as water, HSPAN selectively absorbed the water component, allowing ethanol to dissolve in the gasoline phase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fanta, G F -- Burr, R C -- Orton, W L -- Doane, W M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):646-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17815154" 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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  • 8
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    Unknown
    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2017-05-19
    Keywords: Planetary Science
    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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