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121.
H. -E. Zimmer J. Engert P. Frach I. Henning E. Hegenbarth 《Ferroelectrics Letters Section》1986,6(2):33-40
Specific heat capacity, thermal conductivity and complex dielectric constant of BaTiO3 ceramic have been measured to temperatures as low as 0.1 K. No influence of an applied electric field on specific heat o r thermal conductivity has been detected. After removing of an applied static electric field a logarithmic time dependence of the dielectric constant has been observed. 相似文献
122.
123.
Initial assessment of the effect of laser ?chirp? on optical systems is described. Measurements of the wavelength shift and its effect on the received pulse after 4 km and 80 km of dispersive fibre are presented. The results are in good agreement with simple modelling, which predicts no penalty for this system Further tests are needed to determine whether this behaviour is typical. 相似文献
124.
125.
Coffey Patricia; Leitenberg Harold; Henning Kris; Turner Tonia; Bennett Robert T. 《Canadian Metallurgical Quarterly》1996,64(5):1090
With a community sample of 192 women who had been sexually abused during childhood, the investigators determined if methods of coping in adulthood with the aftermath of child sexual abuse were associated with current symptoms of psychological distress. Multiple regression analyses indicated that disengagement methods of coping with the sexual abuse accounted for unique variance in general psychological distress even after controlling for characteristics of the abuse and methods of coping with other stressors. Disengagement methods of coping were also used more often to deal with the stressful aspects of having been sexually abused than to deal with other stressful events. In contrast, engagement methods of coping were used more often to deal with the other stressors than with sexual abuse. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
126.
S Hashemolhosseini YD Stierhof I Hindennach U Henning 《Canadian Metallurgical Quarterly》1996,178(21):6258-6265
Assembly of tail fibers of coliphage T4 requires the action of helper proteins. In the absence of one of these, protein 38 (p38), p37, constituting the distal part of the long tail fiber, fails to oligomerize. In the absence of the other, p57, p34 (another component of the long tail fiber), p37, and p12 (the subunit of the short tail fiber) remain unassembled. p38 can be replaced by the Tfa (tail fiber assembly) protein (pTfa) of phage lambda, which has the advantage of remaining soluble even when produced in massive amounts. The mechanisms of action of the helpers are unknown. As a first step towards elucidation of these mechanisms, p57 and pTfa have been purified to homogeneity and have been crystallized. The identity of gene 57 (g57), not known with certainty previously, has been established. The 79-residue protein p57 represents a very exotic polypeptide. It is oligomeric and acidic (an excess of nine negative charges). It does not contain Phe, Trp, Tyr, His, Pro, and Cys. Only 25 N-terminal residues were still able to complement a g57 amber mutant, although with a reduced efficiency. In cells overproducing the protein, it assumed a quasi-crystalline structure in the form of highly ordered fibers. They traversed the cells longitudinally (and thus blocked cell division) with a diameter approaching that of the cell and with a hexagonal appearance. The 194-residue pTfa is also acidic (an excess of 13 negative charges) and is likely to be dimeric. 相似文献
127.
Walter Kutschera Peter J. Billquist Dieter Frekers Walter Henning Kenneth J. Jensen Ma Xiuzeng Richard Pardo Michael Paul Karl E. Rehm Robert K. Smither Jan L. Yntema Leonard F. Mausner 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》1984,5(2):430-435
The half-life of 60Fe has been measured to be a, significantly longer than the one previous measurement of Roy and Kohman which reported a value of 3 × 105 a uncertain by a factor of 3. The present value was obtained from measurements of specific activity and radioisotope concentration in a material produced by spallation of copper with 191 MeV protons. 60Fe/Fe ratios in the range of 10?8 were measured with the Argonne FN tandem-superconducting linear accelerator system in conjunction with an Enge split-pole spectrograph. The specific activity of 60Fe in Fe was measured through the grow-in of the 1.332 MeV gamma-ray line of the 60Co daughter activity. 相似文献
128.
129.
Serial measurements of left ventricular ejection fraction by radionuclide angiography early and late after myocardial infarction 总被引:1,自引:0,他引:1
HR Schelbert H Henning WL Ashburn JW Verba JS Karliner RA O''Rourke 《Canadian Metallurgical Quarterly》1976,38(4):407-415
1-Acyl-2-succinyl glycero-3-phosphorylcholine (GPC) was synthesized and its properties described. Although 1-acyl-2-succinyl GPC is a good substrate for succinate dehydrogenase, experiments on the incorporation of [2,3-14C] succinate into mitochondrial lipids gave no evidence to indicate that it is an intermediate in the enzymic oxidation of succinate to fumerate, as has been suggested earlier. 相似文献
130.