منابع مشابه
A Catalyst White Paper
Foreword In this era of technology innovation, it is easy to forget that some things haven't changed very much. Take litigation for example. The process of preparing and trying a case was established hundreds of years ago. A client seeks help in resolving a dispute. Counsel meets, formulates initial theories and looks for evidence that can be introduced in trial. Witnesses are interviewed and d...
متن کاملCatalyst deactivation
The fundamentals of catalyst deactivation are presented in this review. The chemico-physical aspects concerning the various deactivation causes (i.e. poisoning, sintering, coking, solid-state transformation, masking, etc.) have been analyzed and discussed, along with the mathematical description of the deactivation phenomena. # 1999 Elsevier Science B.V. All rights
متن کامل-elimination catalyst
The oligonucleotide [5'-32P]pdT8d(-)dT., containing an apurinic/apyrimidinic (AP) site [d(-)], yields three radioactive products when incubated at alkaline pH: two of them, forming a doublet approximately at the level of pdT8dA when analysed by polyacrylamide-gel electrophoresis, are the result of the f-elimination reaction, whereas the third is pdT8p resulting from ,8-elimination. The incubati...
متن کاملA bio-hybrid rotaxane catalyst
In processive catalysis, a catalyst binds to a substrate and remains bound while performing several consecutive reactions, as exemplified by DNA polymerases. Processivity is essential in Nature, and is often mediated by a clamp-like structure that physically tethers the catalyst to its (polymeric) template. In the case of the bacteriophage T4 replisome, a dedicated clamp protein acts as a proce...
متن کاملDetection of a charge-separated catalyst precursor state in a linked photosensitizer-catalyst assembly.
We have designed two new supramolecular assemblies based on Co(ii)-templated coordination of Ru(bpy)3(2+) (bpy = 2,2'-bipyridyl) analogues as photosensitizers and electron donors to a cobaloxime macrocycle, which are of interest as proton reduction catalysts. The self-assembled photocatalyst precursors were structurally characterized by Co K-edge X-ray absorption spectroscopy and solution-phase...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 2005
ISSN: 0028-0836,1476-4687
DOI: 10.1038/433591a