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Digitale Medien

Microbiological Factor in the Culbin Sands Afforestation Scheme (1950)

EASTWOOD, D. J. ; FRASER, G. K. ; WEBLEY, D. M.

[s.l.] : Nature Publishing Group

Nature 165 (1950), S. 980-980

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Comparison of Tables 1 and 2 shows the enormous increase in microbial numbers due to the planting and growth of trees. Also it will be seen from Table 2 that the highest numbers of micro-organisms are found in the top few inches. Here, too, the formation of a thin zone of humification is evidence ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/165980b0

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2

Digitale Medien

Superconductivity of Tin Isotopes (1950)

ALLEN, W. D. ; DAWTON, R. H. ; LOCK, J. M. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 1071-1071

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Maxwell?s3 value Tc = 3.662K. for an enriched sample with M = 123.1 lies well on a graph of these results, and so too does the value Tc = 3.726K. for natural tin4 (M = 118.7). A log-log plot shows that our results are consistent with the relation Tc a 1/M1/2, but until the atomic weights have been ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/1661071a0

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3

Digitale Medien

Configuration of Carbohydrates, Hydroxy-Acids and Amino-Acids: Stereochemical Standards of Configuration (1950)

BREWSTER, PHYLLIS ; HUGHES, E. D. ; INGOLD, C. K. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 178-179

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The agreed standard by reference to which con-figurations are expressed in the carbohydrate and hydroxy-acid series is glyceraldehyde, the (+)-form of which is 'D' by definition. By the use of transformations which do not change any bond of the asymmetric carbon atom, it has been shown, for ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/166178a0

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4

Digitale Medien

Configuration of Carbohydrates, Hydroxy-Acids and Amino-Acids: Configurations of Amino-Compounds and the Steric Course of Deamination (1950)

BREWSTER, PHYLLIS ; HIRON, FRANK ; HUGHES, E. D. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 179-180

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] IT was shown in 19371 that a Waiden inversion ' could be firmly located in a series of chemical changes, that sign of rotation could be connected with configuration, and that the incidence of Waiden inversions generally could be reduced to rule, by consideration of the two kinetically ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/166179a0

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5

Digitale Medien

Copper Deficiency of Fruit Trees in Britain (1950)

BOULD, C. ; NICHOLAS, D. J. D. ; TOLHURST, J. A. H. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 165 (1950), S. 920-921

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] A PATHOLOGICAL condition due to copper deficiency, known as exanthema, affects various fruit trees, including Citrus species and rosaceous trees. It was first recorded in Citrus in Florida so long ago as 1875; but it was not until 1928 that Smith and Thomas1 reported it as occurring in French ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/165920a0

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6

Digitale Medien

Excess of Positive Mesons in Cosmic Rays (1950)

CARO, D. E. ; PARRY, J. K. ; RATHGEBER, H. D.

[s.l.] : Nature Publishing Group

Nature 165 (1950), S. 688-689

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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. Differential momentum spectrum at sea-level of cosmic ray particles able to penetrate 10 cm. of lead This communication reports preliminary measurements of the meson momentum spectrum made with a cosmic-ray spectrometer over the range 2 χ ΙΟ8 to 5 Χ 1010 eV., the limit of resolution of the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/165688b0

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7

Digitale Medien

The Ion N 2 O 3 + . Binding by One-Electron Transfer (1950)

GOULDEN, J. D. S. ; INGOLD, C. K. ; MILLEN, D. J.

[s.l.] : Nature Publishing Group

Nature 165 (1950), S. 565-565

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] We regard the components of this compound ion as being held together by a one-electron bond, that is, by the reversible electron-transfer which would interconvert structures I and II. It is reasonable that structure I should make a considerably larger contribution than II to the wave-function of ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/165565a0

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8

Digitale Medien

Walden Inversion and Reaction Mechanism: Walden Inversion in the Acid Hydrolysis of Carboxylic Esters by Unimolecular Alkyl Fission (1950)

BUNTON, C. A. ; HUGHES, E. D. ; INGOLD, C. K. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 680-680

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] ONE of the less thoroughly investigated of the seven mechanisms of carboxylic ester hydrolysis, which Day and Ingold listed and associated with observed or predicted structural, kinetic and stereo -chemical characteristics1, is the acid-catalysed, unimolecular reaction involving alky 1- oxygen ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/166680a0

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9

Digitale Medien

Walden Inversion and Reaction Mechanism: Walden Inversion in Unimolecular Reactions of Secondary and Tertiary Alkyl Halides (1950)

HUGHES, E. D. ; INGOLD, C. K. ; MARTIN, R. J. L. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 679-680

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] ONE of the rules, given in our papers of 1937 on the relation of the Walden inversion to reaction mechanism1, was that unimolecular substitutions, $jvl of alkyl compounds involve racemization with excess of inversion, the excess diminishing when conjugation increases the stability of the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/166679a0

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10

Digitale Medien

Synthesis of Serine by Micro-organisms (1950)

LASCELLES, JUNE ; WOODS, D. D.

[s.l.] : Nature Publishing Group

Nature 166 (1950), S. 649-650

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] We have found with growing cultures of Leuco-nostoc mesenteroides P60 that serine may be partially replaced by glycine in the presence of pyridoxal and carbon dioxide, and that the replacement is almost total on the further addition of p-aminobenzoate. These observations enabled us also to apply a ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/166649a0

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