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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 80 (1958), S. 105-107 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The antibody response in mice to type I calf skin collagen is quantitatively determined by genes which map to the I region of the H-2 histocompatibility complex. The use of H-2 recombinant B10 congenic strains of mice reveals that a gene in the IA subregion and a gene to the right of the IA subregion affect responsivenss. To examine complementation patterns in the antibody response to collagen, five B10 congenic strains, each bearing an independent H-2 haplotype, were intercrossed to obtain nine hybrid strains heterozygous at the H-2 locus. In five combinations heterozygous progeny produced significantly greater antibody responses than those observed for the homozygous parental strains. Two low responder haplotypes, H-2k and H-2d, were shown to be qualitatively different. Mice of these haplotypes show a different dose-response pattern and a different phenotypic pattern of inheritance with respect to the high responder H-2b haplotype. Complementation effects found in F1 hybrid mice derived from H-2 recombinant parental strains indicate that high responsiveness, controlled by an IAb subregion gene, can be influenced by an interaction between an IAk subregion gene and an ICd subregion gene on different chromosomes. These data are consistent with the possibility that there exist two or more I region genes that have distinct functions and can interact to affect the levels of immune responsiveness.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 911-911 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Urine was collected for exactly twelve hours daily, for four days a week, over a period of 26 weeks. From the beginning of the fifth week to the end of the thirteenth week sorbitol was taken. The intention was to begin with 20 gm. daily for two or three days, and to increase it within two weeks to ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 470-471 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE wish to suggest a structure for the salt of (Jeoxyribose nucleic acid (D.N.A.). This structure has novel features which arc of considerable biological interest. A structure for nucleic acid has already been proposed by Pauling and Corey1. They kindly made their manuscript available to us in ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 248 (1974), S. 765-765 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest. A structure for nucleic acid has already been proposed by Pauling and Corey1. They kindly made their manuscript available to us in ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 964-967 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE importance of deoxyribonucleic acid (DNA) X within living cells is undisputed. It is found in all dividing cells, largely if not entirely in the nucleus, where it is an essential constituent of the chromosomes. Many lines of evidence indicate that it is the carrier of a part of (if not all) the ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 473-475 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is a striking fact that almost all small viruses are either rods or spheres. The purpose of this article is to explain this observation by means of the following simple hypothesis : a small virus contains identical sub-units, packed together in a regular manner. It has been suggested before1 ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 995-996 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An interesting transformation in these patterns is observed on raising the relative humidity above 90 per cent. A 'wet' form is obtained with the powder rings altered as listed in Table 1. The outermost rings are altered very little, but the inner rings are changed greatly both in position and ...
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 8 (1969), S. 201-205 
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zusammenfassung In den vergangenen Jahren hat sich ein wachsendes Interesse an der Schwingungs-Scheruntersuchung in der Rheologie gezeigt. Diese Arbeit beschreibt eine Meßmethode, die auf Korrelationstechniken beruht und die in Verbindung mit einem Weißenberg-Rheogoniometer zur direkten digitalen Anzeige der Porengoniometer zur direkten digitalen Anzeige der Probencharakteristiken führt. Der Solartron JM 1600, ein digitaler Frequenzanalysator, und der JX 1606, ein mechanisches Vergleichssynchronisiergerät, bilden die Grundlage des Meßsystems. Das Signal wird vom Übertrager auf der unteren Platte des Rheogoniometers übernommen und an das mechanische Bezugssynchronisiergerät weitergegeben. Das mechanische Bezugssynchronisiergerät gibt eine digitale Information in Abhängigkeit von der Frequenz und Phase der oszillatorischen Bewegung. Diese Information wird dem JM 1600 eingegeben und bildet ein Vergleichssignal für den Korrelator. Ein zweites Signal wird vom Übertrager, der sich auf der oberen Platte des Rheogoniometers befindet, entnommen. Der JM 1600 vergleicht dann die obere mit der unteren Platte. Die auf diese Art und Weise korrelierten Signale sind repräsentativ für jeden beliebigen Parameter, den der Übertrager liefert. Verstärkung und Phase des Ausgangs im Vergleich zum Eingang werden in kartesischen, Polar- oder log-Polarkoordinaten dargestellt. Das Gerät liefert Ausgangssignale sowohl in digitaler als auch analoger Form zur direkten „on-line“-Speicherung der Ergebnisse. Der Frequenzbereich erstreckt sich von 10−5 bis zu 160 Hz. Das Gerät ist voll programmierbar für die regelmäßige „on-line“-Probenahme bei Theologischen Prüfungen.
    Notes: Summary In recent years, a growing interest has been shown in oscillatory shear testing when applied to Rheology. This paper describes a method of measurement based on correlation techniques, which when used in conjunction with aWeissenberg Rheogoniometer, provides direct digital readout of the specimen characteristics. The Solartron JM 1600 Digital Frequency Response Analyser and JX 1606 Mechanical Reference Synchroniser form the basis of the system. A signal is taken from the transducer on the lower platen of the rheogoniometer and fed to the mechanical reference synchroniser. The mechanical Reference Synchroniser provides digital information relating to the frequency and phase of the oscillatory motion. This information is fed to the JM 1600 Digital Transfer Function Analyser and forms a reference signal for the correlator. A second signal is taken from the transducer on the upper platen of the Rheogoniometer, and the JM 1600 then correlates upper against lower platens. The signals so correlated, can be representative of whatever parameters the transducers provide. The gain and phase of the output with respect to the input, are displayed in cartesian, polar or log polar co-ordinates. The instrument also provides outputs in both digital and analogue form, for direct on line recording of the results. The frequency spectrum covered is from 10−5 c/s to 160 c/s, and the instrument is fully programmable for on line routine sampling of rheological specimens.
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 778-780 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE amount of ribonucleic acid in exponentially growing Escherichia coli cells with a generation time of about 30 min. is of the order of 25 per cent of the dry weight of the organism. This value varies inversely with the time of generation and seems directly related to the synthetic ability of the ...
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