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Digitale Medien

The shape, expansion rate and distance of supernova 1993J from VLBI measurements (1994)

Bartel, N. ; Bietenholz, M. F. ; Rupen, M. P. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 368 (1994), S. 610-613

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Our measurements were made with a global VLBI array of between 9 and 15 antennas, observing for up to 18 h at one to four frequencies at each of three epochs (Table 1). We correlated the data from a large subarray of antennas, representing 30% of all the data, at Haystack Observatory; the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/368610a0

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2

Digitale Medien

Crystal structure of the extracellular region of human tissue factor (1994)

Harlos, K. ; Martin, D. M. A. ; O'Brien, D. P. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 370 (1994), S. 662-666

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Residues 1-219 of tissue factor (TF2i9) were expressed in Escherichia coli, purified and crystallized as described previously5. TF2i9 was fully functional in assays for soluble tissue-factor activity6 and bound to factor VII in ligand blots7. The structure of TF219 was solved by multiple ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/370662a0

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3

Digitale Medien

Ligand for FLT3/FLK2 receptor tyrosine kinase regulates growth of haematopoietic stem cells and is encoded by variant RNAs (1994)

Hannum, C. ; Culpepper, J. ; Campbell, D. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 368 (1994), S. 643-648

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] To develop an assay for the FLT3/FLK2 ligand (FL) and to identify producer cells, we transfected the pro-B cell line Ba/F3 (ref. 6) with a cDNA clone encoding mouse FLT3/FLK2. Stable transformants, called Baflt, were then used as target cells in a proliferation assay with conditioned medium from ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/368643a0

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4

Digitale Medien

Detection of a γ-ray burst of very long duration and very high energy (1994)

Hurley, K. ; Dingus, B. L. ; Mukherjee, R. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 372 (1994), S. 652-654

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] This event occurred on 1994 February 17 at 82,962s UT. Figure 1 shows the location of the burst as determined by the Compton Telescope (COMPTEL)8, the Energetic Gamma-Ray Experiment Telescope (EGRET) and Interplanetary Network (Ulysses/Burst And Transient Source Experiment, BATSE). Figure 2 shows ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/372652a0

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5

Digitale Medien

Identity of planar defects in the Infinite-layer' copper oxide superconductor (1994)

Zhang, H. ; Wang, Y. Y. ; Dravid, V. P. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 370 (1994), S. 352-354

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] Infinite-layer samples with the nominal chemical formula (Sr,_JCCaJ〉,CuO2 (j〉 = 0.9, 1.0 and 1.1; jt = 0.3) were prepared using pre-synthesized precursors of low-pressure forms of (Sr,_,Cax)CuO2 with additions of CuO and (Sr,_xCa,)2CuO3, followed by a high-pressure treatment. The synthesis ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/370352a0

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6

Unbekannt

Complete DNA sequence of yeast chromosome XI (1994)

Dujon, B. ; Alexandraki, D. ; André, B. ; [weitere]

Springer Nature

In: Nature. 1994; 369(6479): 371-378. Published 1994 Jun 01. doi: 10.1038/369371a0.

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Publikationsdatum: 1994-06-01

Print ISSN: 0028-0836

Digitale ISSN: 1476-4687

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

Publiziert von Springer Nature

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7

Digitale Medien

Analysis of the p16 gene ( CDKN2 ) as a candidate for the chromosome 9p melanoma susceptibility locus (1994)

Kamb, A. ; Shattuck-Eidens, D. ; Eeles, R. ; [weitere]

[s.l.] : Nature Publishing Group

Nature genetics 8 (1994), S. 22-26

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ISSN: 1546-1718

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Medizin

Notizen: [Auszug] A locus for familial melanoma, MLM, has been mapped within the same interval on chromosome 9p21 as the gene for a putative cell cycle regulator, p16INK4 (CDKN2) MTS1. This gene is homozygously deleted from many tumour cell lines including melanomas, suggesting that CDKN2 is a good candidate for ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/ng0994-22

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8

Digitale Medien

A new cell for in situ X-ray diffraction studies of catalysts and other materials under reactive gas atmospheres (1994)

Puxley, D. C. ; Squire, G. D. ; Bates, D. R.

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 27 (1994), S. 585-594

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ISSN: 1600-5767

Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Thema: Geologie und Paläontologie , Physik

Notizen: A novel cell for in situ X-ray diffraction (XRD) has been designed and built. It allows the study of samples in flowing or static reactive gas environments at atmospheric pressure and at temperatures up to 1273 K. The sample is supported on a quartz-glass frit between two hemispherical heaters. The reactant gas mixture passes through the powder sample and is analysed on exit by quadrupole mass spectrometry and/or gas chromatography. Since all the reactants pass through the sample, the arrangement is particularly suitable for the study of catalysts. This instrument geometry also ensures that all the diffracting sample is in the same environment and gives high diffracted intensity, allowing the system to be used with a standard X-ray source and detector. A thermocouple placed in the sample provides an accurate measure of sample temperature; the temperature distribution across the sample is very uniform. Three examples of the use of the high-temperature cell for in situ X-ray diffraction (XRD) are presented. These give some idea of the scope of experiments that can be performed in the apparatus. Two of the examples involve studies of catalysts in various gases, the other follows the course of a solid-state reaction.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1107/S0021889893013597

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9

Digitale Medien

Macromolecular crystallography with synchrotron radiation. II. Results (1983)

Wilson, K. S. ; Stura, E. A. ; Wild, D. L. ; [weitere]

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 16 (1983), S. 28-41

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ISSN: 1600-5767

Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Thema: Geologie und Paläontologie , Physik

Notizen: Crystallographic data for three different protein crystals (glycogen phosphorylase b to 2 Å resolution, β-lactamase I to 2.5 Å resolution and troponin C to 6 Å resolution) have been recorded using the intense synchrotron radiation beam emitted by the DCI storage ring at LURE and the DORIS storage ring at DESY/EMBL. Reduction in exposure times of approximately 50-fold and an increase in crystal lifetime of at least fivefold are observed when data recorded at LURE are compared with those recorded with a conventional rotating-anode source. These factors have made possible data collection which otherwise would have been impossible. For large crystals of phosphorylase b a greater reduction in exposure time ( × 125) is made possible by the focusing geometry of the synchrotron-monochromator system which allowed irradiation of a larger volume of the crystal (collimator size increased from 0.3 to 1.0 mm) without significant increase in spot overlap on the film. The data processing statistics for phosphorylase b and β-lactamase compare favourably with those from data recorded on a conventional source (improvements in merging R values of between 1 and 4%). For phosphorylase b, but not for β-lactamase or troponin C, significant thermal diffuse scatter is observed on photographs recorded with synchrotron radiation. The possible origin of this phenomenon and its effect on data processing are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1107/S0021889883009917

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10

Digitale Medien

GRIFFIN, D. R. ; DUNNING, D. C. ; CAHLANDER, D. A. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 196 (1962), S. 1185-1186

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] MOST of the bats which rely on echo-location have iVJL relatively large and complex external ears compared with those of other mammals. Some of the Microchiroptera, especially the family Vespertil-ionidae, hold their ears in a virtually fixed position relative to the head when they are active, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/1961185a0

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