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  • Articles  (580)
  • Male  (404)
  • Engineering
  • 1990-1994  (580)
  • Physics  (405)
  • Electrical Engineering, Measurement and Control Technology  (175)
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (580)
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  • 1
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    An all D-amino acid opioid peptide with central analgesic activity from a combinatorial library (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-23
    Description: A synthetic combinatorial library containing 52,128,400 D-amino acid hexapeptides was used to identify a ligand for the mu opioid receptor. The peptide, Ac-rfwink-NH2, bears no resemblance to any known opioid peptide. Simulations using molecular dynamics, however, showed that three amino acid moieties have the same spatial orientation as the corresponding pharmacophoric groups of the opioid peptide PLO17. Ac-rfwink-NH2 was shown to be a potent agonist at the mu receptor and induced long-lasting analgesia in mice. Analgesia produced by intraperitoneally administered Ac-rfwink-NH2 was blocked by intracerebroventricular administration of naloxone, demonstrating that this peptide may cross the blood-brain barrier.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dooley, C T -- Chung, N N -- Wilkes, B C -- Schiller, P W -- Bidlack, J M -- Pasternak, G W -- Houghten, R A -- DA-000138/DA/NIDA NIH HHS/ -- DA-02615/DA/NIDA NIH HHS/ -- DA-03742/DA/NIDA NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):2019-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Torrey Pines Institute for Molecular Studies, San Diego, CA 92121.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7801131" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Analgesics/chemistry/metabolism/*pharmacology ; Animals ; Brain/metabolism ; Dose-Response Relationship, Drug ; Endorphins/pharmacology ; Enkephalin, Ala(2)-MePhe(4)-Gly(5)- ; Enkephalin, D-Penicillamine (2,5)- ; Enkephalins/metabolism ; Guinea Pigs ; Injections, Intraventricular ; Male ; Mice ; Models, Molecular ; Molecular Sequence Data ; Naloxone/administration & dosage/pharmacology ; Opioid Peptides/chemistry/metabolism/*pharmacology ; Pain Measurement ; Protein Conformation ; Rats ; Receptors, Opioid, mu/agonists/metabolism ; Stereoisomerism
    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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  • 2
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    Specific association of human telomerase activity with immortal cells and cancer (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-23
    Description: Synthesis of DNA at chromosome ends by telomerase may be necessary for indefinite proliferation of human cells. A highly sensitive assay for measuring telomerase activity was developed. In cultured cells representing 18 different human tissues, 98 of 100 immortal and none of 22 mortal populations were positive for telomerase. Similarly, 90 of 101 biopsies representing 12 human tumor types and none of 50 normal somatic tissues were positive. Normal ovaries and testes were positive, but benign tumors such as fibroids were negative. Thus, telomerase appears to be stringently repressed in normal human somatic tissues but reactivated in cancer, where immortal cells are likely required to maintain tumor growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, N W -- Piatyszek, M A -- Prowse, K R -- Harley, C B -- West, M D -- Ho, P L -- Coviello, G M -- Wright, W E -- Weinrich, S L -- Shay, J W -- AG07992/AG/NIA NIH HHS/ -- CA50195/CA/NCI NIH HHS/ -- CA65178/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):2011-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Geron Corporation, Menlo Park, CA 94025.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7605428" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Division ; Cell Line ; Cell Line, Transformed/enzymology ; DNA Nucleotidylexotransferase/*metabolism ; Enzyme Activation ; Enzyme Repression ; Female ; Humans ; Male ; Molecular Sequence Data ; Neoplasms/*enzymology ; Ovary/enzymology ; Polymerase Chain Reaction ; Testis/enzymology ; Tumor Cells, Cultured
    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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    Identification of herpesvirus-like DNA sequences in AIDS-associated Kaposi's sarcoma (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-16
    Description: Representational difference analysis was used to isolate unique sequences present in more than 90 percent of Kaposi's sarcoma (KS) tissues obtained from patients with acquired immunodeficiency syndrome (AIDS). These sequences were not present in tissue DNA from non-AIDS patients, but were present in 15 percent of non-KS tissue DNA samples from AIDS patients. The sequences are homologous to, but distinct from, capsid and tegument protein genes of the Gammaherpesvirinae, herpesvirus saimiri and Epstein-Barr virus. These KS-associated herpesvirus-like (KSHV) sequences appear to define a new human herpesvirus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, Y -- Cesarman, E -- Pessin, M S -- Lee, F -- Culpepper, J -- Knowles, D M -- Moore, P S -- New York, N.Y. -- Science. 1994 Dec 16;266(5192):1865-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, NY 10032.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7997879" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*complications ; Amino Acid Sequence ; Base Composition ; Base Sequence ; Blotting, Southern ; Cloning, Molecular ; DNA, Viral/*analysis/chemistry/genetics ; Female ; Herpesviridae/*genetics ; Herpesvirus 2, Saimiriine/genetics ; Herpesvirus 4, Human/genetics ; Humans ; Male ; Molecular Sequence Data ; Nucleic Acid Hybridization ; Open Reading Frames ; Polymerase Chain Reaction ; Retrospective Studies ; Sarcoma, Kaposi/etiology/*virology ; Sequence Homology, Amino Acid
    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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    Is a new virus the cause of KS? (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 1994 Dec 16;266(5192):1803-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7997874" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*complications ; DNA, Viral/*analysis ; Herpesviridae/*genetics/isolation & purification ; Homosexuality, Male ; Humans ; Male ; Sarcoma, Kaposi/etiology/*virology
    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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    Specification of C/EBP function during Drosophila development by the bZIP basic region (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-16
    Description: The biologically relevant interactions of a transcription factor are those that are important for function in the organism. Here, a transgenic rescue assay was used to determine which molecular functions of Drosophila CCAAT/enhancer binding protein (C/EBP), a basic region-leucine zipper transcription factor, are required for it to fulfill its essential role during development. Chimeric proteins that contain the Drosophila C/EBP (DmC/EBP) basic region, a heterologous zipper, and a heterologous activation domain could functionally substitute for DmC/EBP. Mammalian C/EBPs were also functional in Drosophila. In contrast, 9 of 25 single amino acid substitutions in the basic region disrupted biological function. Thus, the conserved basic region specifies DmC/EBP activity in the organism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rorth, P -- New York, N.Y. -- Science. 1994 Dec 16;266(5192):1878-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Carnegie Institution of Washington, Baltimore, MD 21210.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7997882" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Base Sequence ; Basic-Leucine Zipper Transcription Factors ; CCAAT-Enhancer-Binding Proteins ; DNA/metabolism ; DNA-Binding Proteins/chemistry/genetics/*physiology ; Drosophila/genetics/*growth & development ; Female ; G-Box Binding Factors ; *Leucine Zippers ; Male ; Molecular Sequence Data ; Nuclear Proteins/chemistry/genetics/*physiology ; Recombinant Fusion Proteins ; Transcription Factors/chemistry/genetics/*physiology ; Transcriptional Activation
    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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    Naturally occurring variation in bristle number and DNA polymorphisms at the scabrous locus of Drosophila melanogaster (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-09
    Description: The association between quantitative genetic variation in bristle number and molecular variation at a candidate neurogenic locus, scabrous, was examined in Drosophila melanogaster. Approximately 32 percent of the genetic variation in abdominal bristle number (21 percent for sternopleural bristle number) among 47 second chromosomes from a natural population was correlated with DNA sequence polymorphisms at this locus. Several polymorphic sites associated with large phenotypic effects occurred at intermediate frequency. Quantitative genetic variation in natural populations caused by alleles that have large effects at a few loci and that segregate at intermediate frequencies conflicts with the classical infinitesimal model of the genetic basis of quantitative variation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lai, C -- Lyman, R F -- Long, A D -- Langley, C H -- Mackay, T F -- GM45146/GM/NIGMS NIH HHS/ -- GM45344/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Dec 9;266(5191):1697-702.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Population Biology, University of California at Davis 95616.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7992053" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Base Sequence ; DNA/genetics ; *Drosophila Proteins ; Drosophila melanogaster/anatomy & histology/*genetics ; Female ; *Genes, Insect ; *Genetic Variation ; *Glycoproteins ; Haplotypes ; Linkage Disequilibrium ; Male ; Molecular Sequence Data ; Phenotype ; *Polymorphism, Genetic ; Proteins/*genetics ; Restriction Mapping ; Sense Organs/anatomy & histology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Could drugs, rather than a virus, be the cause of AIDS? (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 1994 Dec 9;266(5191):1648-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7992047" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*chemically induced/immunology ; Clinical Trials as Topic ; Female ; HIV Infections/drug therapy/mortality ; Humans ; Male ; Street Drugs/*adverse effects ; Zidovudine/*adverse effects/therapeutic use
    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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    Insights into reproduction (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fischman, J -- Ray, L B -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1459.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985005" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Contraception ; Female ; Humans ; Male ; *Reproduction/genetics/physiology ; Sex Differentiation
    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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    Insights from the study of animals lacking functional estrogen receptor (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-02
    Description: Estrogen hormones produce physiological actions within a variety of target sites in the body and during development by activating a specific receptor protein. Hormone responsiveness for the estrogen receptor protein was investigated at different stages of development with the use of gene knockout techniques because no natural genetic mutants have been described. A mutant mouse line without a functional estrogen receptor was created and is being used to assess estrogen responsiveness. Both sexes of these mutant animals are infertile and show a variety of phenotypic changes, some of which are associated with the gonads, mammary glands, reproductive tracts, and skeletal tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korach, K S -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1524-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Receptor Biology Section, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estrogens/*physiology ; Female ; Heterozygote ; Homozygote ; Humans ; Infertility, Female/etiology ; Infertility, Male/etiology ; Male ; Mice ; Mice, Knockout ; Mutation ; Phenotype ; Receptors, Estrogen/genetics/*physiology ; Signal Transduction
    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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    Implantation and the placenta: key pieces of the development puzzle (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-02
    Description: The mammalian embryo cannot develop without the placenta. Its specialized cells (trophoblast, endoderm, and extraembryonic mesoderm) form early in development. They attach the embryo to the uterus (implantation) and form vascular connections necessary for nutrient transport. In addition, the placenta redirects maternal endocrine, immune, and metabolic functions to the embryo's advantage. These complex activities are sensitive to disruption, as shown by the high incidence of early embryonic mortality and pregnancy diseases in humans, as well as the numerous peri-implantation lethal mutations in mice. Integration of molecular and developmental approaches has recently produced insights into the molecules that control these processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cross, J C -- Werb, Z -- Fisher, S J -- HD 22210/HD/NICHD NIH HHS/ -- HD 26732/HD/NICHD NIH HHS/ -- HD 30367/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1508-18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985020" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blastocyst/physiology ; Cell Differentiation ; Embryo Implantation/*physiology ; Embryonic and Fetal Development/genetics/*physiology ; Female ; Gene Expression Regulation, Developmental ; Hormones/physiology ; Humans ; Immune Tolerance ; Male ; Placenta/cytology/*physiology ; Trophoblasts/physiology ; Uterus/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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