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  • Polymer and Materials Science  (58)
  • Humans  (8)
  • 1985-1989  (27)
  • 1980-1984  (39)
  • 1
    Publication Date: 1984-11-16
    Description: A human histone gene cluster was assigned to chromosome 1 by Southern blot analysis of DNA's from a series of mouse-human somatic cell hybrids with 32P-labeled cloned human H4 and H3 histone DNA as probes. Localization of this histone gene cluster on the long arm of chromosome 1 was confirmed by in situ hybridization of this DNA probe to metaphase chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Green, L -- Van Antwerpen, R -- Stein, J -- Stein, G -- Tripputi, P -- Emanuel, B -- Selden, J -- Croce, C -- GM20138/GM/NIGMS NIH HHS/ -- GM20700/GM/NIGMS NIH HHS/ -- GM32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):838-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494913" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; *Chromosomes, Human, 1-3 ; Chromosomes, Human, 6-12 and X ; DNA/metabolism ; Genes ; Histones/*genetics ; Humans ; Hybrid Cells/metabolism ; Mice ; Nucleic Acid Hybridization
    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
    Publication Date: 1984-06-08
    Description: An H1 histone gene was isolated from a 15-kilobase human DNA genomic sequence. The presence of H2A, H2B, H3, and H4 genes in this same 15-kilobase fragment indicates that mammalian core and H1 histone genes are clustered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carozzi, N -- Marashi, F -- Plumb, M -- Zimmerman, S -- Zimmerman, A -- Coles, L S -- Wells, J R -- Stein, G -- Stein, J -- GM 32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 8;224(4653):1115-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719136" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA/genetics ; *Genes ; HeLa Cells ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; Rabbits ; Trout ; Xenopus
    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: 1982-02-05
    Description: The synthesis of histone proteins in G1 and S phase HeLa S3 cells was examined by two-dimensional electrophoretic fractionation of nuclear and total cellular proteins. Newly synthesized histones were detected only in S phase cells. Histone messenger RNA sequences, as detected by hybridization with cloned human histone genes, were present in the cytoplasm of S phase but not G1 cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marashi, F -- Baumbach, L -- Rickles, R -- Sierra, F -- Stein, J L -- Stein, G S -- New York, N.Y. -- Science. 1982 Feb 5;215(4533):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058333" target="_blank"〉PubMed〈/a〉
    Keywords: *Cell Cycle ; Cell Nucleus/metabolism ; Cytarabine/pharmacology ; Cytoplasm/metabolism ; Female ; HeLa Cells/*metabolism ; Histones/*biosynthesis ; Humans ; Protein Biosynthesis ; Transcription, Genetic
    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: 1987-06-05
    Description: Cell cycle-dependent histone genes are transcribed at a basal level throughout the cell cycle, with a three- to fivefold increase during early S phase. Protein-DNA interactions in the 5' promoter region of a cell cycle-regulated human H4 histone gene have been analyzed at single-nucleotide resolution in vivo. This region contains two sites, with four potential protein-binding domains, at which the DNA is protected from reaction with dimethyl sulfate in cells and from digestion with deoxyribonuclease I in nuclei. These protein-DNA interactions persist during all phases of the cell cycle and dissociate with 0.16 to 0.2M sodium chloride.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pauli, U -- Chrysogelos, S -- Stein, G -- Stein, J -- Nick, H -- GM32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jun 5;236(4806):1308-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3035717" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Cycle ; Cell Line ; Dna ; DNA Restriction Enzymes ; Deoxyribonuclease I ; Gene Expression Regulation ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; *Promoter Regions, Genetic ; Protein Binding ; Sulfuric Acid Esters
    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
    ISSN: 0009-286X
    Keywords: Fermenter ; viskose Flüssigkeiten ; Begaser ; Biotechnologie ; Stoffübergang ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A modified method for the determination of the number of isotactic sites C* and the overall propagation rate constant k̄p of propene polymerization catalysts with 14C-labelled carbon oxides is proposed: an excess of 14CO2 or 14CO is added in the abscence of propene and alkylaluminium to a non-deactivated polymer sample drawn from the polymerization slurry.The specific radioactivity of the polymer as a function of the time of contact with the radio-actively labelled inhibitor sharply increases within short times of contact (14CO2 ≤ 20 min, 14CO ≤ 5 min). This is followed by a slower further increase reaching a finite value after 5 to 7h. The initial and end values differ by a factor of 2 to 3. The results are explained in terms of sites with different reactivity assuming that the total number of isotactic sites is determined only after long times of contact with the inhibitor.So far c* was determined with 14CO2 or 14CO by adding the inhibitor during the polymerization in the presence of propene and alkylaluminium; c* was calculated after short times of contact with the inhibitor, whereas the further steady increase in specific radioactivity was exclusively attributed to side reactions caused by reaction with propene and alkylaluminium.By this modified method we obtained for TiCl3·(1/3)AlCl3 at 60°C k̄p = 13 dm3/(mol·s) and c* = 0,012 mol Ti*/mol Titotal. Addition of a free Lewis base to the polymerization mixture increases c* leaving k̄p unchanged. In contrast to this, if TiCl3·(1/3) AlCl3 is milled with a Lewis base k̄p can be increased by a factor of ≈ 2,5 with lower or equal c* -values. The higher activity of extracted TiCl3-catalyst is due to higher k̄p and c* -values as compared to those using TiCl3·(1/3) AlCl3.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 263-279 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The chloromethyl derivatives of 16 differently substituted methylenediphenols were synthesized for the first time. To compare their reactivity, the solvolysis in methanol and the animolysis with an excess of p-nitroaniline in dimethyl sulfoxide were studied kinetically at 25°C. The rate constants for the methanolysis do not differ very much, beside of the fact that para-chloromethyl derivatives react about 100 times faster than ortho-chloromethyl derivatives. However, for the aminolysis a large acceleration up to 103 was found for compounds having both hydroxyl groups in ortho-position to the methylene bridge. Obviously, the cleavage of the O—H bond, which occurs in the rate determining step of the aminolysis, is strongly favoured by an intramolecular hydrogen bond between the phenolic hydroxyl groups.
    Additional Material: 5 Tab.
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 251-262 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Amorphous poly(ethylene terephthalate) has been solid state coextruded to a series of draw ratios up to 4.4 at 50, 60, 70 and 90°C. These uniaxially drawn samples have been examined by optical microscopy and light scattering and for increases in crystallinity and birefringence as a function of draw ratio and draw temperature. The birefringence for PET may be among the highest yet reported - 0.21.
    Additional Material: 7 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 36 (1988), S. 511-521 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The stress relaxation behavior of model silicone room temperature vulcanizing (RTV) elastomers has been used to examine the chemistry of the cured silicone network. It has been shown that the tin crosslinking catalyst, together with water, produces siloxane bond rearrangement which results in chemical stress relaxation. The measurement of the rate of stress relaxation of unfilled model elastomers at various temperatures gave an apparent activation energy of 10.3 kcal/mole-1 for the relaxation process. In addition, the effects of some of the constituents of the RTV on relaxation behavior have been examined.
    Additional Material: 8 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 17 (1986), S. 61-65 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation of Non-Magnetic Manganese-Silicon-Steels for Retaining RingsThe need for higher strength of retaining rings on electric generator shafts is met today by stress corrosion resistant austenitic manganesechromium-nitrogen-steels like X 5 MnCr N 18 18. The aim of this paper is the investigation of less expensive manganese-silicon-carbon-steels for perfectly dry conditions. By cold working and a recrystallising annealing treatment, as well as by the addition of 0.1 % niobium a small grain size is achieved. Thereby the flow stress is raised and furthermore by silicon which increases the solution strengthening and the work hardening rate during the final cold working. Compared to the steel X 55 MnCr 184 the alloy X 55 MnSi 18 3 shows a higher strength but is more sensitive to stress corrosion cracking.
    Notes: Dem Wunsch nach hochfesten Kappenringen für Wechselstromgeneratoren wird heute durch spannungsrißkorrosionsbeständige austenitische Stähle wie X 5 MnCrN 18 18 entsprochen. Das Ziel der vorliegenden Arbeit war die Untersuchung kostengünstigerer Mangan-Silizium-Kohlenstoff-Stähle für völlig trockene Betriebsbedingungen. Durch Kaltverformung und Rekristallisation sowie durch Zugabe von 0,1% Niob läßt sich eine feine Korngröße einstellen. Dadurch steigt die Fließgrenze wie auch durch die Zugabe von Silizium, das die Mischkristallhärte und den Verfestigungskoeffizient bei der abschließenden Kaltverformung erhöht. Im Vergleich zum bisher gebräuchlichen kostengünstigen Stahl X 55 MnCr 184 zeigt die Legierung X 55 MnSi 18 3 eine höhere Festigkeit, aber auch eine stärkere Neigung zur Spannungsrißkorrosion.
    Additional Material: 7 Ill.
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