作者: contrast-medium 時(shí)間: 2025-3-21 22:54 作者: 機(jī)密 時(shí)間: 2025-3-22 02:40 作者: 柔軟 時(shí)間: 2025-3-22 06:46
Synthesis of oligosaccharides of bacterial origin containing heptoses, uronic acids and fructofuran excellent yields of α-linked fructofuranosyl disaccharides are obtained. Application of the internal aglycon delivery approach, with the aglycon tethered to the .-face of the fructofuranosyl thioglycoside donor as part of a 3-.-.-methoxybenzylidene acetal, produced stereospecifically high yields of作者: 人類(lèi)學(xué)家 時(shí)間: 2025-3-22 09:29 作者: analogous 時(shí)間: 2025-3-22 13:14
,Die Eiwei?fasern (Proteinfasern),ialic acids. This review examines the most recent methods used for the synthesis and modification of sialic acids and for the preparation of sialyl glycosides as biological probes of sialic acid-recognising proteins.作者: analogous 時(shí)間: 2025-3-22 20:00
Erratum to: Telephonie und Mikrophonie,que and structurally complex carbohydrate-related compounds that may be regarded as metabolically stable mimetics of oligosaccharides and that are thus of interest because of their potential bioactivity.作者: hemorrhage 時(shí)間: 2025-3-22 23:18
Tandem asymmetric C-C bond formations by enzyme catalysis,que and structurally complex carbohydrate-related compounds that may be regarded as metabolically stable mimetics of oligosaccharides and that are thus of interest because of their potential bioactivity.作者: obeisance 時(shí)間: 2025-3-23 04:21 作者: 女歌星 時(shí)間: 2025-3-23 05:33
https://doi.org/10.1007/978-3-662-41113-1d when looking for a given selectivity. Some selected examples of diand oligosaccharide synthesis by glycosidase-catalyzed reactions are included to illustrate the scope of this methodology. The use of lipases in organic solvents for acylation and deacylation reactions of carbohydrates is also described in some detail.作者: 灰姑娘 時(shí)間: 2025-3-23 09:49 作者: Cosmopolitan 時(shí)間: 2025-3-23 17:22
Synthesis and modification of carbohydrates using glycosidases and lipases,d when looking for a given selectivity. Some selected examples of diand oligosaccharide synthesis by glycosidase-catalyzed reactions are included to illustrate the scope of this methodology. The use of lipases in organic solvents for acylation and deacylation reactions of carbohydrates is also described in some detail.作者: 可互換 時(shí)間: 2025-3-23 21:56
Chemical transformations employing glycosyltransferases,ied acceptor and donor substrates which give access to heterooligosaccharides in preparative quantities, are described. The following contribution focuses on modern developments and presents some selected recent examples from the author’s laboratory and others.作者: 青少年 時(shí)間: 2025-3-23 23:26 作者: PHIL 時(shí)間: 2025-3-24 02:52 作者: 可互換 時(shí)間: 2025-3-24 08:46 作者: LIKEN 時(shí)間: 2025-3-24 11:51 作者: Deject 時(shí)間: 2025-3-24 15:21 作者: 旋轉(zhuǎn)一周 時(shí)間: 2025-3-24 22:16 作者: Veneer 時(shí)間: 2025-3-25 01:14
https://doi.org/10.1007/978-3-7091-3929-5te synthesis. After extensive contributions of biochemistry to this field over several decades, bioorganic applications of enzymes for synthetic purposes have increased significantly only over recent years. This chapter will highlight the rather complex task of stereospecific and regiospecific glyco作者: osculate 時(shí)間: 2025-3-25 05:55
https://doi.org/10.1007/978-3-7091-3664-5in conjugates such as glyco-, lipo-,phospho- and nucleoproteins are at the focal point of intense biochemical research. They are involved, for instance, in the regulation of cell growth and, in consequence, also in malignant proliferation processes which can lead to cancer. This biological importanc作者: 鉗子 時(shí)間: 2025-3-25 07:33
Erratum to: Telephonie und Mikrophonie, recent development of a novel synthetic technique which uses tandem enzyme catalysis for the bi-directional chain elongation of simple dialdehydes and related multi-step procedures. The scope and the limitations of multiple one-pot enzymatic C-C bond formations is evaluated for the synthesis of uni作者: Tractable 時(shí)間: 2025-3-25 11:53
,Die Eiwei?fasern (Proteinfasern),tance in these processes, especially those with relevance to human disease states, has led to interest in the synthesis of both natural and modified sialic acids. This review examines the most recent methods used for the synthesis and modification of sialic acids and for the preparation of sialyl gl作者: glisten 時(shí)間: 2025-3-25 18:35
,Die Werkstoffe für Veredlungsmaschinen,-D-.-heptopyranosyl-containing oligosaccharides are reported. Synthesis of the heptose trisaccharide structures from the core region of lipopolysaccharides from . and . bacteria are described together with larger fragments containing hexoses as well. In the second part, development of reactive .-sel作者: glans-penis 時(shí)間: 2025-3-25 22:43 作者: antedate 時(shí)間: 2025-3-26 03:33
Synthesis and modification of carbohydrates using glycosidases and lipases,ohydrates. The use of these readily available enzymes with polyhydroxylated carbohydrate substrates is sometimes hampered by the low regioselectivity of the reactions. Several features of the reactions are shown, focusing the discussion on the factors that can affect the selectivity. Thus, the enzym作者: 美麗的寫(xiě) 時(shí)間: 2025-3-26 08:11
Chemical transformations employing glycosyltransferases,te synthesis. After extensive contributions of biochemistry to this field over several decades, bioorganic applications of enzymes for synthetic purposes have increased significantly only over recent years. This chapter will highlight the rather complex task of stereospecific and regiospecific glyco作者: Directed 時(shí)間: 2025-3-26 09:20
,Enzymatic synthesis of peptide conjugates — Tools for the study of biological signal transduction,in conjugates such as glyco-, lipo-,phospho- and nucleoproteins are at the focal point of intense biochemical research. They are involved, for instance, in the regulation of cell growth and, in consequence, also in malignant proliferation processes which can lead to cancer. This biological importanc作者: 消毒 時(shí)間: 2025-3-26 14:29 作者: microscopic 時(shí)間: 2025-3-26 18:10 作者: nephritis 時(shí)間: 2025-3-26 23:52 作者: 易改變 時(shí)間: 2025-3-27 03:30
,Pyruvated saccharides — Novel strategies for oligosaccharide synthesis, higher cells. These groups are responsible for the distinctive physical and biological properties of the respective saccharides, and are thus attractive targets for chemical synthesis. In this review, methods for the efficient preparation of pyruvated building blocks for oligosaccharide synthesis a作者: 要素 時(shí)間: 2025-3-27 08:44 作者: 休閑 時(shí)間: 2025-3-27 12:58 作者: nonsensical 時(shí)間: 2025-3-27 15:43
Stetig verteilte Kr?fte, SchwerpunkteThe primary aim of this chapter is to demonstrate different strategies, chemical and chemoenzymatic, for the preparation of glycosides of pharmaceutically active and broadly used compounds — ergot alkaloids. New glycosides prepared recently have interesting immunomodulatory, neuroactive and cytostatic activity.作者: 硬化 時(shí)間: 2025-3-27 21:01 作者: lanugo 時(shí)間: 2025-3-28 00:51
978-3-540-65557-2Springer-Verlag Berlin Heidelberg 1997作者: 爆炸 時(shí)間: 2025-3-28 02:58
The Art of the Brainh we have discovered only in the past twenty years or so. No visual art is therefore possible without the visual brain, from which it follows that all art, whether in conception, in execution or in appreciation, must obey the laws of the brain.作者: ANTH 時(shí)間: 2025-3-28 06:45
https://doi.org/10.1007/978-3-642-57159-6Unter Halbleitern versteht man die Elemente oder Verbindungen, deren spezifischer Widerstand zwischen dem der Metalle und dem der Isolatoren liegt, d. h., Werte zwischen etwa 10. und 10. Ω cm hat. Abb. 1 zeigt den spezifischen Widerstand einiger Elemente und Verbindungen.
