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Digitale Medien

Daucic Acid and its Occurrence in Plants (1971)

KEYS, A. J. ; LEAVER, C. J. ; BARTON, D. H. R. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 232 (1971), S. 423-424

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Bulk quantities of this acid, conveniently named daucic acid, were isolated from carrots (preferably mature) by extraction of the pulped roots with hot water. After the removal of solid material, the acid, together with nucleotide and polysaccharide material, was adsorbed on activated charcoal at ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/232423b0

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2

Digitale Medien

Muscarinic Action of Acetylcholine (1971)

CURTIS, D. R. ; FELIX, D.

[s.l.] : Nature Publishing Group

Nature 234 (1971), S. 355-355

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] We report that the excitation of spinal Renshaw cells by a cholinomimetic which interacts with muscarinic receptors cannot be selectively reduced by DNP. The excitation of these cells by acetyl-?-methylcholine is very sensitive to atropine and is relatively insensitive to dihydro- ? -erythroidine4, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/234355a0

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3

Digitale Medien

Purity of Synthetic Peptide Preparations (1971)

BANGHAM, D. R. ; CALAM, D. H. ; PARSONS, J. A. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 232 (1971), S. 631-631

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The impact of these problems in the field of radioimmuno-assay was discussed at some length2*3 at the recent workshop meeting in Edinburgh. In the case of one commercial synthetic angiotensin already widely used in research, evidence has been recorded of varying stability between batches4 and ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/232631a0

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4

Digitale Medien

Ethnic Differences in Human Blood Cell Sodium Concentration (1971)

MUNRO-FAURE, A. D. ; HILL, D. M. ; ANDERSON, J.

[s.l.] : Nature Publishing Group

Nature 231 (1971), S. 457-458

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The methods of estimating blood cell ion concentrations and water content have been described already2*3. Freshly drawn blood was centrifuged in standardized conditions and the sodium, potassium and water content of weighed samples of plasma and of the packed cell column were measured. ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/231457a0

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5

Digitale Medien

Polychlorinated Biphenyl absorbed from Sediments by Fiddler Crabs and Pink Shrimp (1971)

NIMMO, D. R. ; WILSON, P. D. ; BLACKMAN, R. R. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 231 (1971), S. 50-52

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] In August 1969, pink, white and brown shrimps (Penaeus duorarum, P. setiferus, and P. aztecus) from Escambia Bay were found to contain whole body residues of 'Aroclor 1254' at concentrations as high as 14.0 p.p.m. Most was concentrated in the hepatopancreas; residues in seven composite samples of ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/231050b0

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6

Digitale Medien

Electric Effects of the Failure of Fibre Reinforced Plastics (1971)

CLARKE, D. R. ; SIMS, G. D.

[s.l.] : Nature Publishing Group

Nature 230 (1971), S. 322-324

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Mahieu has demonstrated1 that there are electrical and luminescent effects associated with .the failure of glass reinforced resins. He showed that current changes of between 10~12 and 10-10 A occurred both in the direction of the bias current and/or in opposition to it when a tensile specimen was ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/230322a0

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7

Digitale Medien

Identification of 1,25-Dihydroxycholecalciferol, a New Kidney Hormone controlling Calcium Metabolism (1971)

LAWSON, D. E. M. ; FRASER, D. R. ; KODICEK, E. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 230 (1971), S. 228-230

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] A vitamin D metabolite, 25-dihydroxycholecalciferol, is further hydroxylated by kidney before acting as a hormone on target tissues. The structure of this kidney metabolite is now ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/230228a0

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8

Digitale Medien

Long Term Persistence of Parathion in Soil (1971)

STEWART, D. K. R. ; CHISHOLM, D. ; RAGAB, M. T. H.

[s.l.] : Nature Publishing Group

Nature 229 (1971), S. 47-47

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Field plots, established at Kentville, Nova Scotia, in 1949 to study the persistence of parathion in soil and its uptake by plants, received annual spring applications of 31.4 Ib per acre (15.7 p.p.m. soil concentration) of parathion from 1949 to 1953 inclusive. The compound was thoroughly ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/229047a0

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9

Digitale Medien

Baffin Bay—an Ocean (1971)

BARRETT, D. L. ; KEEN, C. E. ; MANCHESTER, K. S. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 229 (1971), S. 551-553

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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 Location of the refraction line (the heavy black line). The bathymetry contours are in hundreds of metres. Fig. 2 The record stations. Velocities are in km/s. The right-hand figure shows recordings at the southern station and the left-hand figure shows recordings at the northern station. A ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/229551a0

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10

Digitale Medien

CO 2 -dependent Oxygen Evolution by Envelope-free Chloroplasts (1971)

WALKER, D. A. ; MCCORMICK, ANN V. ; STOKES, D. M.

[s.l.] : Nature Publishing Group

Nature 233 (1971), S. 346-347

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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 shows that oxygen was evolved immediately after illumination of a mixture from which PGA (3-phospho-glycerate) and R5P were initially omitted. This evolution is attributable to the reduction of NADP and it ceased (or slowed, depending on the activity and content of the chloroplast extract) ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/233346a0

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