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Digitale Medien

Operation of the Backward-Wave Oscillator (1960)

WONG, M. Y. ; SIMS, G. D. ; STEPHENSON, I. M.

[s.l.] : Nature Publishing Group

Nature 188 (1960), S. 803-804

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The travelling-wave-tube analogue was described in detail in a recent paper1, and is based on the lumped circuit travelling-wave tube first described by Matthews2. Briefly it consists of a series of drift tubes inside a vacuum envelope interconnected with a series of inductance coils which are ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/188803b0

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2

Digitale Medien

WOODCOCK, M. R. ; PILLINGER, C. T. ; STEPHENSON, A.

[s.l.] : Nature Publishing Group

Nature 276 (1978), S. 697-698

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] To obtain a quantitative measure of surface located iron metal, a mild specific leaching agent was used. Although X-ray photoelectron spectroscopy (XPS)6,7 may distinguish between Fe(II) and Fe(0) at depths 〈 20 Å, this technique is not quantitative. Fe(0) is readily dissolved in a ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/276697a0

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3

Digitale Medien

Pentamerism and the ancestral echinoderm (1974)

STEPHENSON, D. G.

[s.l.] : Nature Publishing Group

Nature 250 (1974), S. 82-83

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Fig. 1 Nichols' hypothetical ancestral echinoderm, in cross section. Nichols' reconstruction, like many primitive echinoderms, has mouth, hydropore and anus in a straight line. Such an animal must live with the anus on the downstream side, to carry waste products away from mouth and hydro-pore ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/250082a0

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4

Digitale Medien

Explanation of Apparent Diurnal Variation in Caesium Clock Rates (1970)

CRIBBENS, A. H. ; STEPHENSON, L. M.

[s.l.] : Nature Publishing Group

Nature 226 (1970), S. 139-139

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The rates of the two clocks were compared by timing the arrival of ?ticks? transmitted on a 100 kHz carrier. The path length was about 550 km. An apparent decrease in the frequency of the remote clock relative to the local standard of approximately one part in 1011 was observed in the hour ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/226139a0

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5

Digitale Medien

gag Gene of mammalian type-C RNA tumour viruses (1976)

Barbacid, Mariano ; Stephenson, John R. ; Aaronson, Stuart A.

[s.l.] : Nature Publishing Group

Nature 262 (1976), S. 554-559

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The translation product of the gag gene of mammalian type-C RNA viruses is a 65,000–68,000 molecular weight precursor polypeptide (Pr65) whose cleavage leads to the formation of four virion proteins, p30, p15, p12 and p10. An immunological approach has been used to establish the arrangement ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/262554a0

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6

Digitale Medien

Immunological and biochemical characterisation of type C viruses isolated from cultured human AML cells (1976)

OKABE, HIROMI ; GILDEN, RAYMOND V. ; HATANAKA, MASAKAZU ; [weitere]

[s.l.] : Nature Publishing Group

Nature 260 (1976), S. 264-266

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Recently, immunological and molecular hybridisation methodology has been applied to the type-specific differentiation of known primate viruses3?9. The viruses that can be distinguished include three members of the related woolly monkey (SSV-l)?gibbon ape group and three members of the endogenous ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/260264a0

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7

Digitale Medien

Life-time of the Lithium Atomic Resonance States (1951)

STEPHENSON, G.

[s.l.] : Nature Publishing Group

Nature 167 (1951), S. 156-156

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The Ladenburg absorption formula3 relating the integral of the absorption coefficient over the whole line to the Einstein transition probability coefficient Anm may be conveniently put in the form loge(I0/IV)dl(1)pNƒe2ll02/mc2 (1) where N is the number of normal atoms of absorbing vapour per ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/167156a0

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8

Digitale Medien

Possible Role of Proteolytic Enzymes in Protein Synthesis (1953)

LOFTFIELD, ROBERT B. ; GROVER, JOHN W. ; STEPHENSON, MARY L.

[s.l.] : Nature Publishing Group

Nature 171 (1953), S. 1024-1025

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] As a test of this hypothesis, Hendler and Green-berg5 have recently studied the metabolism of labelled y-glutamyl-glycine; but they found that this particular compound is not significantly involved in any of several living systems that incorporate amino-acids into proteins. The evidence presented ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/1711024a0

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9

Digitale Medien

Experimental Determination of the Life-times of Atomic Resonance States (1951)

STEPHENSON, G.

[s.l.] : Nature Publishing Group

Nature 167 (1951), S. 112-112

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Further work is progressing with the view of adapting the method to molecular transitions, and the results will be reported at a later date. Atom Transition Wave-length Life-time (sec.) Na 32S-32P 5896, 5890 A. 1.61 0.06 x 10-8 K 42S-42P 7699, 7665 2.71 0.09 x 10-8 Rb 52S-52P 7947, 7800 2.81 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/167112a0

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10

Digitale Medien

Endogenous C-type viral expression in primates (1977)

STEPHENSON, JOHN R. ; AARONSON, STUART A.

[s.l.] : Nature Publishing Group

Nature 266 (1977), S. 469-472

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The development of immunoassays for the 30,000 molecular weight major structural protein (p30)7,8, the 70,000 molecular weight glycoprotein (gp70)g and a 15,000 molecular weight protein (p!5)9 of a prototype virus isolate of P. cynocephalus made it possible to compare the immunological relatedness ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/266469a0

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