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151.
Journal of Thermal Analysis and Calorimetry - In order to identify suitable volume nucleation agents in glasses, heat treatments and subsequent traditional microscopic investigations are necessary.... 相似文献
152.
N. T. Madhu P. K. Radhakrishnan Matthias Grunert Peter Weinberger Wolfgang Linert 《Thermochimica Acta》2003,400(1-2):29-36
The phenomenological, kinetic and mechanistic aspects of thermal decomposition of perchlorate, nitrate, chloride, bromide and iodide complexes of cobalt(II) with the Schiff base 1,2-di(imino-4′-antipyrinyl)ethane (GA) have been studied by TG and DTG analyses. The kinetic parameters like the activation energy, pre-exponential factor and entropy of activation were calculated. The decomposition reactions follow “random nucleation with one nucleus on each particle—Mampel model”. 相似文献
153.
154.
Katrin Tent 《Advances in Mathematics》2004,181(2):308-320
Let G be a group with an irreducible spherical BN-pair of rank 2 where B contains a normal nilpotent subgroup U with B=U(B∩N). Then G is essentially a group of Lie type. This completes the classification of split BN-pairs of rank 2, generalizing the corresponding result for finite groups due to Fong and Seitz. 相似文献
155.
Katrin Schumacher 《Acta Appl Math》1992,28(3):296-297
Book Reviews
Ordered algebraic structuresJorge Martinez (ed.): Proceedings of the Caribbean Mathematics Foundation Conference on Ordered Algebraic Structures, Curaçao, August 1988, Mathematics and Its Applications, vol. 55, Kluwer Academic Publishers, Dordrecht, Boston, London, 1989, xx + 278 pp., ISBN 0-7923-0489-6, US$ 104. 相似文献156.
157.
Katrin de Graaf Hanna Czajkowska Sabine Rottmann Len C Packman Richard Lilischkis Bernhard Lüscher Walter Becker 《BMC biochemistry》2006,7(1):7
Background
The U2 small nuclear ribonucleoprotein particle (snRNP) component SF3b1/SAP155 is the only spliceosomal protein known to be phosphorylated concomitant with splicing catalysis. DYRK1A is a nuclear protein kinase that has been localized to the splicing factor compartment. Here we describe the identification of DYRK1A as a protein kinase that phosphorylates SF3b1in vitro and in cultivated cells. 相似文献158.
Serine proteinases fulfill and facilitate a broad spectrum of biological processes. They are held in check by different specific inhibitors. This delicate balance can be disturbed by genetic defects or exogenous influences and has been shown as the underlying or promoting cause for a large number of different diseases. For instance, proteinases are under investigation as drug targets for cancer, infections, neurodegenerative diseases, osteoporosis, inflammatory disorders and many more. Dermatological research has contributed greatly to the appreciation of the complex regulatory network between serine proteinases and serine proteinase inhibitors. In addition, proteolytically trimmed proteinase-activated receptors (PARs) trigger keratinocyte proliferation and differentiation as well as leukocyte attraction and activation. New insights have been gained particularly concerning the progression of inflammatory disorders of the skin. This review summarizes the role of serine proteinase inhibitors in physiology and pathophysiology of the skin. 相似文献
159.
160.
Marcel Ritter Vincensius S. P. Oetama Daniel Schulze Katrin Muetzlaff Anja K. Meents Dr. Raphael A. Seidel Dr. Helmar Görls Prof. Dr. Matthias Westerhausen Prof. Dr. Wilhelm Boland Prof. Dr. Georg Pohnert 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(28):6205-6213
The degradation of chlorophyll, the omnipresent green pigment, has been investigated intensively over the last 30 years resulting in many elucidated tetrapyrrolic degradation products. With a comparison to the degradation of the structurally similar heme, we hereby propose a novel additional chlorophyll degradation mechanism to mono- and dipyrrolic products. This is the first proof of the occurrence of a family of mono- and dipyrrols in leaves that are previously only known as heme degradation products. This product family is also found in spit and feces of herbivores with specific metabolomic patterns reflecting the origin of the samples. Based on chromatographic and mass spectrometric evidence as well as on mechanistic considerations we also suggest several tentative new degradation products. One of them, dihydro BOX A, was fully confirmed as a novel natural product by synthesis and comparison of its spectroscopic data. 相似文献