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  • Species Specificity  (24)
  • American Association for the Advancement of Science (AAAS)  (24)
  • Wiley
  • Annual Reviews
  • 2005-2009
  • 1990-1994
  • 1980-1984  (24)
  • 1980  (24)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (24)
  • Wiley
  • Annual Reviews
Years
  • 2005-2009
  • 1990-1994
  • 1980-1984  (24)
Year
  • 1
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    Widespread occurrence in frogs and toads of skin compounds interacting with the ouabain site of Na+, K+-ATPase (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-02
    Description: Amphibians of the family Bufonidae contain high levels of skin compounds that both inhibit Na+- and K+-dependent adenosinetriphosphatase and antagonize the binding of ouabain to the enzyme. In species of Bufo and Atelopus, these compounds are relatively nonpolar bufodienolides, whereas Dendrophryniscus and Melanophryniscus contain more polar compounds of unknown structure. Skin extracts from 30 of 48 species of frogs representing an additional eight families contained relatively low levels of compounds that inhibit binding of ouabain to Na+,K+-adenosinetriphosphatase. The widespread occurrence of low levels of inhibitory compounds is consonant with the role for these compounds as physiological regulators of Na+,K+-adenosinetriphosphatase in amphibian skin; high levels in the Bufonidae probably also serve as a defense against some predators.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flier, J -- Edwards, M W -- Daly, J W -- Myers, C W -- New York, N.Y. -- Science. 1980 May 2;208(4443):503-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6245447" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura/*metabolism ; Binding Sites ; Bufanolides/pharmacology ; Ouabain/antagonists & inhibitors/*metabolism ; Skin/analysis/enzymology/*metabolism ; Sodium-Potassium-Exchanging ATPase/*metabolism ; Species Specificity ; Tissue Extracts/pharmacology
    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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    The phylogeny of prokaryotes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, G E -- Stackebrandt, E -- Hespell, R B -- Gibson, J -- Maniloff, J -- Dyer, T A -- Wolfe, R S -- Balch, W E -- Tanner, R S -- Magrum, L J -- Zablen, L B -- Blakemore, R -- Gupta, R -- Bonen, L -- Lewis, B J -- Stahl, D A -- Luehrsen, K R -- Chen, K N -- Woese, C R -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):457-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6771870" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*classification ; Base Sequence ; Biological Evolution ; Chloroplasts/analysis ; Clostridium/classification ; Cyanobacteria/classification ; DNA/analysis ; *Phylogeny ; RNA, Ribosomal/*analysis ; Species Specificity
    Print ISSN: 0036-8075
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  • 3
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    DNA polymerases in parasitic protozoans differ from host enzymes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-02
    Description: Analysis of extracts of the bloodstream forms of Trypanosoma brucei showed that both DNA polymerase-alpha and DNA polymerase-beta activities were present. The detection of DNA polymerase-beta in T. brucei demonstrates the presence of this enzyme in unicellular organisms. DNA polymerase-beta is present also in Leishmania mexicana. The DNA polymerases in T. brucei are immunologically distinct from the host enzymes. The structural differences between the parasite and the host enzymes could be exploited for the development of agents to combat parasitic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, L M -- Cheriathundam, E -- Mahoney, E M -- Cerami, A -- New York, N.Y. -- Science. 1980 May 2;208(4443):510-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367875" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centrifugation, Density Gradient ; Chickens ; DNA Polymerase I/analysis ; DNA Polymerase II/analysis ; DNA Polymerase III/analysis ; DNA-Directed DNA Polymerase/*analysis ; Fishes ; Immune Sera ; Leishmania/*enzymology ; Molecular Weight ; Rabbits ; Rats ; Species Specificity ; Trypanosoma brucei brucei/*enzymology
    Print ISSN: 0036-8075
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  • 4
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    Immunohistochemical localization of amelogenins in enameloid of lower vertebrate teeth (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: The indirect method of immunofluorescence was used to demonstrate the presence of amelogenins in the enameloid of teeth and dermal denticles of Chondrichthyes; in the enameloid of Teleostei and Amphibia; and in the enamel of Reptilia. Nonmammalian amelogenins are formed in the ectodermal cells of tooth organs and chemically are so similar to mammalian amelogenins that they interact with antiserum prepared from bovine enamel matrix.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Herold, R C -- Graver, H T -- Christner, P -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1357-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986656" target="_blank"〉PubMed〈/a〉
    Keywords: Amelogenesis ; Animals ; Dental Enamel Proteins/immunology/*metabolism ; Fluorescent Antibody Technique ; Species Specificity ; Tooth/*anatomy & histology ; Vertebrates/*anatomy & histology
    Print ISSN: 0036-8075
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  • 5
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    Swim bladder volume maintenance related to initial oceanic migratory depth in silver-phase Anguilla rostrata (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: Gas deposition rates in the swim bladders of postmetamorphic (silver) Anguilla rostrata eels are about five times greater than those of premetamorphic (yellow) individuals. This extends the maximum depth at which silver eels can maintain swim bladder volume and prepares them for their spawning migration to the Sargasso Sea.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleckner, R C -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1481-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384792" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization ; Air Sacs/*physiology ; Anguilla/*physiology ; Animals ; Species Specificity
    Print ISSN: 0036-8075
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  • 6
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    Mutations in a nonessential viral gene permit bacteriophage T4 to form plaques on Escherichia coli valS ts relA (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-11
    Description: During viral development bacteriophage T4 modifies the valyl-transfer RNA synthetase of its host Escherichia coli, but the function of the modification has remained elusive. A strain of Escherichia coli has now been identified which is nonpermissive for wild-type bacteriophage T4, but permissive for bacteriophage mutants impaired in the modification reaction. A comparison with other bacteria suggests that nonpermissiveness is due to synthesis of a thermolabile valyl-transfer RNA synthetase and relaxed control of RNA accumulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marchin, G L -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):294-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6992274" target="_blank"〉PubMed〈/a〉
    Keywords: Escherichia coli/*genetics ; *Genes, Viral ; *Mutation ; Species Specificity ; T-Phages/*genetics ; Viral Plaque Assay
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  • 7
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    Insertion of a new gene of viral origin into bone marrow cells of mice (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: DNA containing the herpes simplex virus thymidine kinase (HSVtk) gene was used to transform wild-type tk+ mouse L cells to a tk++ status in vitro using methotrexate as a selective agent. HSVtk DNA was also used to transform mouse bone marrow cells in vitro. Transformed marrow cells injected into irradiated and methotrexate-treated recipient mice gave rise to proliferating cells which in some cases dominated the marrow population and which contained HSVtk gene sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mercola, K E -- Stang, H D -- Browne, J -- Salser, W -- Cline, M J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1033-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246577" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow/*enzymology ; Bone Marrow Transplantation ; DNA, Viral/analysis ; Drug Resistance ; *Genes, Viral ; L Cells (Cell Line) ; Methotrexate/pharmacology ; Mice ; Simplexvirus/enzymology/*genetics ; Species Specificity ; Thymidine Kinase/*genetics ; *Transformation, Genetic
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  • 8
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    Evolutionary conservation of repetitive sequence expression in sea urchin egg RNA's (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: Cloned repetitive DNA sequences were used to determine the number of homologous RNA transcripts in the eggs of two sea urchin species, Strongylocentrotus purpuratus and S. franciscanus. The eggs of these species contain different amounts of RNA, and their genomes contain different numbers of copies of the cloned repeats. The specific pattern of repetitive sequence representation in the two egg RNA's is nonetheless quantitatively similar. The evolutionary conservation of this pattern suggests the functional importance of repeat sequence expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, G P -- Costantini, F D -- Posakony, J W -- Davidson, E H -- Britten, R J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1046-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6154974" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; DNA, Recombinant ; Female ; Nucleic Acid Hybridization ; Ovum/physiology ; Plasmids ; RNA/*genetics ; Sea Urchins/*genetics ; Species Specificity ; Transcription, Genetic
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  • 9
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    Intercellular adhesion: coconstruction of contractile heart tissue by cells of different species (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: Dissociated embryonic rat myocardial cells and chick myocardial cells labeled with radioactive isotope coaggregate and establish intercellular junctions. These bispecific cells reconstruct synchronously beating myocardial tissue within 24 hours of culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Cheng, M -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; *Cell Aggregation ; Cells, Cultured ; Chickens ; Heart/*embryology ; Intercellular Junctions/ultrastructure ; Mosaicism ; Myocardial Contraction ; Myocardium/*cytology ; Rats ; Species Specificity
    Print ISSN: 0036-8075
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  • 10
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    DDT contamination at Wheeler National Wildlife Refuge (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: Disposal of industrial waste resulted in massive DDT contamination at Wheeler National Wildlife Refuge, Alabama. Nearly a decade after the cessation of DDT manufacturing at the facility responsible, concentrations of DDT residues in the local fauna are still high enough to suggest avian reproductive impairment and mortality. Populations of fish-eating birds are low, endangered species are being exposed, and muscle lipids of game birds contain up to 6900 parts of DDT (isomers and metabolites) per million.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Shea, T J -- Fleming, W J -- Cromartie, E -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):509-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds ; DDT/*analysis ; Ducks ; *Industrial Waste ; Lipids/analysis ; Muscles/analysis ; Rabbits ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 11
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    Sperm-egg interaction: evidence for boar sperm plasma membrane receptors for porcine zona pellucida (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: Freshly ejaculated, noncapacitated boar sperm bind rapidly and in large numbers to pig egg zona pellucida in vitro. In the present study, the number of sperm bound decreased sharply when sperm motility was lowered by energy poisons or by reducing the temperature. Highly motile sperm from humans, guinea pigs, and rats, added at concentrations ten times higher than control sperm, did not bind to the porcine zona. At the same high concentration, a small number of hamster and bull sperm bound to the zona. Binding of boar sperm to the zona pellucida was blocked almost completely by diluted whole antiserum to sperm plasma membranes and by univalent (Fab) antibody to these membranes. When antibody to sperm plasma membrane was first absorbed with plasma membrane vesicles, sperm binding was not inhibited. These results provide direct evidence for the existence of sperm plasma membrane receptors for the zona pellucida of the pig.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peterson, R N -- Russell, L -- Bundman, D -- Freund, M -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):73-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Membrane/metabolism ; Female ; *Fertilization ; Guinea Pigs ; Humans ; Immunoglobulin Fab Fragments ; Male ; Ovum/*metabolism ; Rats ; Receptors, Drug/metabolism ; Species Specificity ; *Sperm-Ovum Interactions ; Spermatozoa/*metabolism ; Swine ; Zona Pellucida/*metabolism
    Print ISSN: 0036-8075
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  • 12
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    Glutamine synthetase: assimilatory role in liver as related to urea retention in marine chondrichthyes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: The levels of gluatmine synthetase specific activity in hepatic and renal tissue are higher in fish that are ureosmoregulators than in those that are not. Enzyme activities in the liver and kidney of 18 species of fish correlated directly with the ureosmoregulatory adaptation of each species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Webb, J T -- Brown, G W Jr -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):293-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102799" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/metabolism ; Animals ; Brain/enzymology ; Fishes/*metabolism ; Glutamate-Ammonia Ligase/*metabolism ; Kidney/enzymology ; Liver/enzymology ; Species Specificity ; Urea/*metabolism ; Water-Electrolyte Balance
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  • 13
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    Glutamine- and N-acetylglutamate-dependent carbamoyl phosphate synthetase in elasmobranchs (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: High levels of glutamine- and N-acetyl-L-glutamate-dependent carbamoyl phosphate synthetase activity are present in liver extracts of marine species of fish that retain high levels of urea in their tissues for the purpose of osmoregulation. The function of the synthetase in these species appears to be related to urea synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, P M -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):291-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6245445" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbamoyl-Phosphate Synthase (Ammonia)/*metabolism ; Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)/*metabolism ; Fishes/*metabolism ; Glutamates/metabolism ; Liver/enzymology ; Phosphotransferases/*metabolism ; Species Specificity ; Urea/metabolism
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  • 14
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    Genetic variation in the human insulin gene (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-01
    Description: Four recombinant lambda phages containing nucleotide sequences complementary to a cloned human preproinsulin DNA probe have been isolated from human DNA. Restriction analyses in conjunction with Southern hybridizations reveal two types of gene sequences. One isolate of each type was subjected to complete nucleotide sequence determination. The sequences contain the entire preproinsulin messenger RNA region, two intervening sequence. 260 nucleotides upstream from the messenger RNA capping site, and 35 nucleotides beyond the polyadenylate attachment site. Our results strongly suggest that these two gene types are allelic variants of a single insulin gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ullrich, A -- Dull, T J -- Gray, A -- Brosius, J -- Sures, I -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):612-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6248962" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cloning, Molecular ; *Dna ; DNA Restriction Enzymes ; DNA, Recombinant/metabolism ; *Genes ; Genetic Code ; *Genetic Variation ; Humans ; Insulin/*biosynthesis ; Nucleic Acid Hybridization ; Proinsulin/biosynthesis ; Rats ; Species Specificity
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  • 15
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    Identification of mosquitoes of Anopheles gambiae species complex A and B by analysis of cuticular components (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-07
    Description: Two important vectors of malaria in Africa, Anopheles gambiae and Anopheles arabiensis (Diptera: Culicidae), often occur sympatrically and cannot be distinguished morphologically. A chemical method was developed to identify individual laboratory-reared adult males or females of either species by extraction and analysis of cuticular components with gas chromatography. Statistically significant differences were seen between species when selected pairs of peaks were compared.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carlson, D A -- Service, M W -- New York, N.Y. -- Science. 1980 Mar 7;207(4435):1089-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355276" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/analysis/*classification ; Chromatography, Gas ; Female ; Lipids/analysis ; Male ; Paraffin/analysis ; Sex Factors ; Skin/analysis ; Species Specificity
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  • 16
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    Therapy of spontaneous metastases by intravenous injection of liposomes containing lymphokines (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: Mice of two different strains were injected subcutaneously with spontaneously metastasizing syngeneic melanomas. After 4 to 6 weeks, the local tumors were removed and, 3 days after surgery, treatment of the metastases was initiated. The treatment consisted of intravenous injections of liposomes containing lymphokines or control supernatant fluids. Liposomes were injected twice weekly for 3 weeks, and the mice were killed 2 weeks later. Seventy-three percent of the mice injected with liposomes containing lymphokines were free of metastases, whereas only 10 percent of the mice treated with control liposomes were tumor-free. These experiments suggest that this form of therapy may provide a valuable addition to the more conventional approaches to the eradication of cancer metastases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fidler, I J -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1469-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384789" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Liposomes/*therapeutic use ; Lymphokines/*therapeutic use ; Melanoma/*drug therapy ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; *Neoplasm Metastasis ; Neoplasms, Experimental/drug therapy ; Species Specificity
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  • 17
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    Strain dependence of the antiproliferative action of interferon on murine erythroid precursors (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-11
    Description: Electrophoretically pure mouse interferon inhibits erythropoietin-dependent proliferation of committed erythroid precursors (CFU-E) obtained either from adult mouse bone marrow or from 14-day fetal mouse livers. The degree of inhibition is significantly influenced by the genotype of the cell donor; about ten times as much interferon is required to inhibit proliferation of CFU-E from C57BL/6 than is needed for comparable inhibition of CFU-E from BALB/c or Swiss mice. These strain-dependent results point to the existence of genes that influence the degree of the inhibitory effect of interferon on cell multiplication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallien-Lartigue, O -- Carrez, D -- De Maeyer, E -- De Maeyer-Guignard, J -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):292-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6155700" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow/drug effects/*physiology ; Cell Division/drug effects ; Embryo, Mammalian ; Erythropoiesis/*drug effects ; Female ; Interferons/*pharmacology ; Liver/drug effects/physiology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Species Specificity
    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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  • 18
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    Genetics and the origin of a vector population: Aedes aegypti, a case study (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-20
    Description: Thirty-four population samples representing the worldwide distribution of the mosquito Aedes aegypti were analyzed for variation at 19 to 22 enzyme-coding genes. A multivariate discriminant analysis revealed that the genetic differences among populations in six geographic regions and between two subspecies enable one to determine the regional origin of a population. Such studies of population genetics may have quite general applicability in studying vector-borne diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Powell, J R -- Tabachnick, W J -- Arnold, J -- New York, N.Y. -- Science. 1980 Jun 20;208(4450):1385-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375945" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*genetics ; Alleles ; Animals ; Enzymes/genetics ; Gene Frequency ; Insect Vectors/*genetics ; Species Specificity
    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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  • 19
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    Dexamethasone fails to suppress beta-endorphin plasma concentrations in humans and rhesus monkeys (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-15
    Description: In humans and rhesus monkeys, dexamethasone decreased concentrations of plasma cortisol but did not alter circulating beta-endorphin immunoreactivity. Contrary to current theory suggesting that pituitary beta-endorphin and adrenocorticotropic hormone are controlled by identical regulatory mechanisms for synthesis and release, our evidence suggests that in higher primates the established glucocorticoid feedback mechanism for the adrenocorticotropic hormone-cortisol system does not regulate beta-endorphin secretion in the same way.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kalin, N H -- Risch, S C -- Cohen, R M -- Insel, T -- Murphy, D L -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):827-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250217" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/secretion ; Adult ; Animals ; Dexamethasone/*pharmacology ; Endorphins/*blood/secretion ; Feedback ; Female ; Haplorhini ; Humans ; Hydrocortisone/blood ; Macaca mulatta ; Male ; Pituitary Gland, Anterior/secretion ; Protein Precursors/metabolism ; Species Specificity ; Stress, Physiological/blood
    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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  • 20
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    Control of the rhesus monkey menstrual cycle: permissive role of hypothalamic gonadotropin-releasing hormone (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: In rhesus monkeys with hypothalamic lesions (which appear to abolish the endogenous production of gonadotropin-releasing hormone), normal ovulatory mestrual cycles were reestablished by an unvarying, long-term replacement regimen consisting of one intravenous pulse of synthetic gonadotropic-releasing hormone per hour. This finding is in accord with the hypothesis that the pattern of pituitary gonadotropin secretion throughout the menstrual cycle (basal secretion interrupted, once every 28 days on the average, by a preovulatory surge) is not directed by alterations in hypothalamic gonadotropin-releasing hormone secretion but by the ebb and flow of ovarian estrogens acting directly on the pituitary gland.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knobil, E -- Plant, T M -- Wildt, L -- Belchetz, P E -- Marshall, G -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1371-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766566" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Castration ; Estradiol/pharmacology ; Female ; Gonadotropin-Releasing Hormone/*physiology ; Haplorhini ; Hypothalamus/*physiology ; Macaca/*physiology ; Macaca mulatta/*physiology ; *Menstruation/drug effects ; Pituitary Gland/physiology ; Species Specificity
    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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  • 21
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    Survival of Escherichia coli host-vector systems in the mammalian intestine (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-18
    Description: Survival in the mouse and human intestine of Escherichia coli host-vector systems used and proposed for recombinant DNA technology was assessed. There was no detectable survival of severely disabled E. coli K12 strain X1776 in mice or in human subjects 24 hours after ingestion. The same strain bearing the plasmid pBR322, however, was recovered from human subjects for 4 days in amounts of six organisms for every million ingested. Nondisabled E. coli K12 strain X1666, with or without pBR322, survived in 10(4)-fold greater numbers and for 2 days longer, with better recovery of the plasmid-containing derivative. Although the plasmid-bearing strains were recovered for longer periods, no intestinal colonization was noted. Despite the presence of pBR322 for a maximum of 6 days in the human intestine, there was no evidence that it was transferred from either bacterial host to endogenous aerobic fecal bacteria.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levy, S B -- Marshall, B -- Rowse-Eagle, D -- Onderdonk, A -- New York, N.Y. -- Science. 1980 Jul 18;209(4454):391-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6992276" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Recombinant/metabolism ; Escherichia coli/*physiology ; Humans ; Intestines/*microbiology ; Mice ; Plasmids ; Species Specificity
    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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  • 22
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    Mammoth albumin (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-11
    Description: Serum albumin was detected immunologically in muscle from a mammoth that died about 40,000 years ago. Rabbits injected with ground mammoth muscle produced antibodies that react strongly with elephant albumin, weakly with sea cow albumin, and still more weakly or not at all with other mammalian albumins. Since elephant albumin elicited antibodies with the same specificity, some of the surviving mammoth albumin molecules evidently have antigenic sites identical to those on native elephant albumin. Much of the mammoth albumin has, however, undergone postmortem change. The small amount of soluble albumin extractable from mammoth muscle is heterogeneous in size, charge, and antigenic properties.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prager, E M -- Wilson, A C -- Lowenstein, J M -- Sarich, V M -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):287-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6155699" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Elephants/*blood ; Epitopes ; *Fossils ; History, Ancient ; Immunodiffusion ; Muscles/*analysis ; *Paleontology ; Rabbits/immunology ; Serum Albumin/*analysis/immunology ; Species Specificity
    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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  • 23
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    Bone cancer from radium: canine dose response explains data for mice and humans (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-04
    Description: Analysis of lifetime studies of 243 beagles with skeletal burdens of radium-226 shows that the distribution of bone cancers clusters about a linear function of the logarithms of radiation dose rate to the skeleton and time from exposure until death. Similar relations displaced by species-dependent response ratios also provide satisfactory descriptions of the reported data on deaths from primary bone cancers in people and mice exposed to radium-226. The median cumulative doses (or times) leading to death from bone tumors are 2.9 times larger for dogs than for mice and 3.6 times larger for people than for dogs. These response ratios are well correlated with the normal life expectancies. The cumulative radiation dose required to give significant risk of bone cancer is found to be much less at lower dose rates than at higher rates, but the time required for the tumors to be manifested is longer. At low dose rates, this time exceeds the normal life-span and appears as a practical threshold, which for bone cancer is estimated to occur at an average cumulative radiation dose to the skeleton of about 50 to 110 rads for the three species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raabe, O G -- Book, S A -- Parks, N J -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):61-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361106" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Neoplasms/*etiology/mortality ; *Disease Models, Animal ; *Dogs ; *Dose-Response Relationship, Radiation ; Humans ; Mice ; Neoplasms, Radiation-Induced/*etiology ; Radium/*adverse effects ; Species Specificity
    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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  • 24
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    Energy requirement for nitrogen fixation in actinorhizal and legume root nodules (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-11
    Description: The ratio of respiration to nitrogenase activity was measured in five species of actinorhizal root nodules and eight species of legume nodules. The two types of nodules could not be distinguished on the basis of this ratio; this evidence thus indicates that the energy cost of nitrogen fixation is similar for both.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tjepkema, J D -- Winship, L J -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):279-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384801" target="_blank"〉PubMed〈/a〉
    Keywords: Actinomycetales/metabolism ; Kinetics ; *Nitrogen Fixation ; Plants/*metabolism ; Rhizobium/metabolism ; Species Specificity
    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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