共查询到20条相似文献,搜索用时 15 毫秒
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《Journal of medical primatology》1992,21(6):332-332
The program will address the current understanding of the pathology and pathogenesis of lentivirus diseases in humans and animals. Speakers will discuss historical importance, clinical and pathologic features, host:virus interaction, and comparison with other lentiviral infections. For more information, contact: 相似文献
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There is an intensive search for heterogeneous single atom catalysts (SACs) of high activity, efficiency, durability, and selectivity for a wide variety of electrocatalytic conversion and chemical reactions, such as the hydrogen evolution reaction (HER), oxygen evolution/reduction reaction (OER and ORR), CO2 reduction reaction (CO2 RR), and nitrogen reduction reaction (NRR). With the downsizing from nanoparticles and clusters to single atoms, there are steady changes in the bond and coordination environment for each and every atom involved. Indeed, the single atoms in these electrocatalysts are not “singles”; they are “married” to the supporting surfaces, and their performance is controlled by the bonding and coordination with the substrate surfaces. Herein, an overview is presented on the brief history leading to the rapid development of SACs and their current status, by focusing on their synthesis, control of composition, strategies to realize single atoms with the desired bonds and coordination, and targeted performance in selected reactions. Their applications in the selected spectrum of energy conversion and chemical reactions are discussed, in relation to their structures at varying length scales down to the atomic level. A particular emphasis is placed on on‐going research activities, together with the future perspectives and particular challenges for SACs. 相似文献
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Wilbert L. A. Hetterscheid Louis H. Batenburg 《Review of Palaeobotany and Palynology》1984,40(4):263-293
This paper deals with a detailed study of Sphenophyllum miravallis Vetter, a member of the “Sphenophyllum thonii group”. New material from the Reisbach colliery, working the “Illinger Flözzone” of the “Heusweiler Schichten” (Lower Stephanian, Saar Basin, German Federal Republic), is described morphologically and anatomically, and the species is discussed. The new material enlarges the known range of variability of the normal aspect of the foliage, i.e. the foliage of the thinner branches. Thicker stems with their aberrant polymorphous foliage, and cellular details, are described for the first time. An emended diagnosis is given. Comparisons with other species are made.
The new species Bowmanites cupulatus is introduced to accommodate fructufications most probably belonging to Sphenophyllum miravallis.
S. crenulatum Knight ex Wagner is considered to be a heterotypic synonym of S. miravallis, the latter name having priority. 相似文献
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K. Hellmich 《Biometrical journal. Biometrische Zeitschrift》1981,23(3):309-310
When taking into account J. G. MENDEL's observed frequencies and comparing them with those noted down by BATESON, CORRENS and DARBISHIRE no ?striking”? preciseness in accordance with the statement made by F. WELLING is to be noticed statistically. By means of the four-field table measure K speculations as to a ?too precise”? indication of frequencies are to be refuted in an easy way. 相似文献
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G. Enderlein 《Biometrical journal. Biometrische Zeitschrift》1986,28(8):980-980
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Le Dinh Phai 《Engineering in Life Science》1983,3(2):177-183
Nuoc-mam is a traditional foodstuff of the people of Vietnam. It is an aromatic sauce of a pleasant taste and consists of a fish hydrolysate. The hitherto used method for producing Nuoc-mam is on principle an autolysis of fish in combination with a microbial fermentation and leads to a salt containing solution of amino acids and of products from removed conversion- and synthese- products from fish and microorganisms. 相似文献