نتایج جستجو برای: site preparation
تعداد نتایج: 523635 فیلتر نتایج به سال:
As part of the conceptual and preliminary design processes of the Thirty Meter Telescope (TMT), the TMT site-testing team has spent the last five years measuring the atmospheric properties of five candidate mountains in North and South America with an unprecedented array of instrumentation. The site-testing period was preceded by several years of analyses selecting the five candidates: Cerros T...
The phosphotriesterase from Pseudomonas diminuta has been shown to selectively cleave the pro-R p-nitrophenolate substituent from bis-p-nitrophenyl alkyl phosphothioate esters. When the alkyl substituent is methyl, ethyl, or isopropyl the enantiomeric excess of the product is >/=99%. Manipulation of the active site through mutagenesis has enabled the preparation of protein variants that prefere...
Our new feature is a section with articles on teacher preparation. The Physics Teacher Education Coalition (PhysTEC), an APS/AAPT/AIP program, will be soliciting these articles and organizing this section. PhysTEC provides dramatic improvement of science preparation of physics, physical science, and elementary teachers, developing programs that work at a wide range of institutions. Our thanks t...
troducing undesired mutations during the preparation of the vector, can negatively affect the frequency of gene targeting in ES cells (13). In summary, the method described here offers an attractive alternative for the preparation of replacement vectors for gene targeting. This protocol can be used to perform site-directed mutagenesis in long genomic sequences cloned into plasmids with the high...
Background: Based on sound evidence, traditional mechanical bowel preparation for elective colorectal surgery has mostly been abandoned during the last two decades. However, more recent evidence from USA large databases show that mechanical bowel preparation combined with oral antibiotics, reduces significantly surgical site infections (SSI) after elective colorectal surgery. Hypothesis-Aim: We...
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