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Digitale Medien

Science and Intellectual Freedom (1925)

DAVIS, WATSON ; THONE, FRANK

[s.l.] : Nature Publishing Group

Nature 116 (1925), S. 284-284

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] AMERICAN men of science naturally felt consider able interest in the trial of John T. Scopes, high school teacher, at Dayton, Tennessee, for the alleged violation of the now famous anti-evolution act on the statute books of that State. Relatively few scientists in this country are directly ...

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URL: http://dx.doi.org/10.1038/116284a0

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2

Digitale Medien

Strassmann, Joan E. ; Hughes, Colin R. ; Queller, David C. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 342 (1989), S. 268-270

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Methods for using genetic markers to estimate relatedness, with standard errors, have been available for a decade4'8. But they have been applied to only three species of primitively eusocial insects (a halictid bee9'10, an anthophorid bee11 and a sphecid wasp12), whose lack of morphologically ...

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URL: http://dx.doi.org/10.1038/342268a0

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3

Digitale Medien

MERLIN observations of the WolfRayet star AS431 (WR147)-a double radio source (1989)

Moran, J. P. ; Davis, R. J. ; Bode, M. F. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 340 (1989), S. 449-450

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] AS431 was observed on 30 January 1988 at 5 GHz with a bandwidth of 9 MHz for a total period of 15 h. As part of the MERLIN extension project, the 5 GHz receivers have recently been equipped with cooling so that the system temperatures on the individual telescopes ranged from 30 K to 40 K. ...

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URL: http://dx.doi.org/10.1038/340449a0

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4

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Influence of coupling of sorption and photosynthetic processes on trace element cycles in natural waters (1989)

Fuller, Christopher C. ; Davis, James A.

[s.l.] : Nature Publishing Group

Nature 340 (1989), S. 52-54

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Although diurnal pH cycles in surface waters are commonly reported4'5, such cycles in the concentrations of trace elements have rarely been observed. Recent observations of diurnal fluctu-ations in iron and copper6'7 have been attributed to direct photochemical oxidation-reduction reactions, ...

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URL: http://dx.doi.org/10.1038/340052a0

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5

Digitale Medien

Heat-flow variations correlated with buried basement topography on the Juan de Fuca Ridge flank (1989)

Davis, Earl E. ; Chapman, David S. ; Forster, Craig B. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 342 (1989), S. 533-537

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The existence of pervasive convection of sea water through oceanic crust was postulated originally to account for locally high heat-flow variability and the observed discrepancy between measured heat flow and that predicted by thermal models of cooling oceanic lithosphere1'4. At mid-ocean ridges, ...

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URL: http://dx.doi.org/10.1038/342533a0

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6

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Phenotypic differences between αβ versus β T-cell receptor transgenic mice undergoing negative selection (1989)

Berg, Leslie J. ; de St. Groth, Barbara Fazekas ; Pullen, Ann M. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 340 (1989), S. 559-562

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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 produced lines of transgenic mice carrying either the rearranged T-cell receptor a-chain gene (refs 11, 12) or /3-chain gene13 from the T-helper hybridoma, 2B4 (ref. 14). The ft chain of this receptor uses the Vp3 gene segment. Recently, it has been demonstrated that T-cell receptors using ...

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URL: http://dx.doi.org/10.1038/340559a0

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7

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Hydroformylation by supported aqueous-phase catalysis: a new class of heterogeneous catalysts (1989)

Arhancet, Juan P. ; Davis, Mark E. ; Merola, Joseph S. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 339 (1989), S. 454-455

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Hydroformylation involves the reaction of carbon monoxide and hydrogen with an alkene to produce aldehydes, a reaction that does not proceed in the absence of a catalyst. It is the oldestand most widely used homogeneous catalytic reaction of alkenes1. No heterogeneous hydroformylation catalysts are ...

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URL: http://dx.doi.org/10.1038/339454a0

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8

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Multidimensional large pores (1989)

Davis, Mark E.

[s.l.] : Nature Publishing Group

Nature 337 (1989), S. 117-117

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] ZEOLITES and zeolite-like materials comprise a broad range of microporous, crystalline solids whose main uses are as adsorbents, catalysts and ion exchangers. These solids have tunable properties such as pore size, shape and capacity, and lead one to believe that designer catalysts are possible ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/337117a0

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9

Digitale Medien

14 C in fractions of dissolved organic carbon in ground water (1989)

Murphy, Ellyn M. ; Davis, Stanley N. ; Long, Austin ; [weitere]

[s.l.] : Nature Publishing Group

Nature 337 (1989), S. 153-155

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The dissolved organic carbon (DOC) in ground water is a diverse mixture of organic compounds which can come from various sources. Thurman4'5 has hypothesized that DOC in ground water may originate from soil through recharge, from Fig. 1 Two-component mixing model for the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/337153a0

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