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1

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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2

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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3

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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4

Digitale Medien

Use of Katharometers in Gas Chromatography (1959)

EDEN, MURRAY ; KARMEN, ARTHUR ; STEPHENSON, JOHN L.

[s.l.] : Nature Publishing Group

Nature 183 (1959), S. 1322-1322

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] His equation, dt/dx = a(k &2), states that the sensitivity of the detector, dt[dx, is proportional to the difference between the thermal conductivity of the carrier gas, kl9 and the vapour, k2, and inversely proportional to the square of the thermal conductivity of the carrier gas. As Ray ...

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URL: http://dx.doi.org/10.1038/1831322a0

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5

Digitale Medien

Identity of ‘Nudic Acid B’ and ‘Diatretyne II’ (1957)

HEATLEY, N. G. ; STEPHENSON, J. S.

[s.l.] : Nature Publishing Group

Nature 179 (1957), S. 1078-1078

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] A sample of the original 'nudie acid B' (10 mgm.) was used for establishing the identity. This had been stored in darkness for ten years without any special precautions against decomposition and had gone black due to surface polymerization. However, when the sample (10 mgm.) was esterified with 3 ...

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URL: http://dx.doi.org/10.1038/1791078a0

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6

Digitale Medien

Presence and Absence of the Pre-Natal Check in Lambs' Birthcoats (1954)

DRY, F. W. ; STEPHENSON, S. K.

[s.l.] : Nature Publishing Group

Nature 173 (1954), S. 878-879

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Sickle-fibres constitute the most easily perceived evidence of the pre-natal check3-5. Of ten N/ + Aggrade lambs studied in a number of body regions, all had sickle-fibres on the shoulder patch and shoulder, and they were present on several necks, withers, sides and o backs, but not on any ...

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URL: http://dx.doi.org/10.1038/173878b0

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7

Digitale Medien

Caution in the Use of Liquid Propane for freezing Biological Specimens (1954)

STEPHENSON, JOHN L.

[s.l.] : Nature Publishing Group

Nature 174 (1954), S. 235-235

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] On one occasion when I was slowly condensing propane in a flask chilled with liquid nitrogen, I obtained what appeared to be such a mixture : that is, I obtained two distinct layers of liquid in the flask, one of which had the characteristic appearance of liquid oxygen. This experience suggested ...

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URL: http://dx.doi.org/10.1038/174235b0

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8

Digitale Medien

Palæomagnetism of Some Dolerite Intrusions from the Theron Mountains and Whichaway Nunataks, Antarctica (1959)

BLUNDELL, D. J. ; STEPHENSON, P. J.

[s.l.] : Nature Publishing Group

Nature 184 (1959), S. 1860-1860

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The directions of remanent magnetization have been measured by Blundell and are shown in Fig. 1. These are arranged in two groups, normal and reversed, which are 180 apart. The two groups have been combined by reversing the polarity of those with downward dips to provide a mean direction of ...

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URL: http://dx.doi.org/10.1038/1841860a0

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9

Digitale Medien

Diameter of the Sun in AD 1715 (1988)

Morrison, Leslie V. ; Stephenson, F. Richard ; Parkinsoni, John

[s.l.] : Nature Publishing Group

Nature 331 (1988), S. 421-423

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] It is a fortunate accident of nature that the Moon and Sun have nearly equal diameters as seen from the surface of the Earth. This concurrence produces total eclipses of the Sun of relatively short duration (typically a few minutes), and this affords a method of measuring the Sun's diameter, with ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/331421a0

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10

Digitale Medien

Gravity currents and the release of salt from an inverse estuary (1987)

Lennon, G. W. ; Bowers, D. G. ; Nunes, R. A. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 327 (1987), S. 695-697

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Gravity currents occur in many natural forms, ranging from the flow of gas in mines to turbidity currents on the ocean floor. In the natural environment, their onset is often unpredictable, and direct observations of them, particularly in the ocean, are rare. Because of this difficulty, the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/327695a0

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