نتایج جستجو برای: reagents
تعداد نتایج: 28929 فیلتر نتایج به سال:
The present review summarizes primary publications on the cross-dehydrogenative C-O coupling, with special emphasis on the studies published after 2000. The starting compound, which donates a carbon atom for the formation of a new C-O bond, is called the CH-reagent or the C-reagent, and the compound, an oxygen atom of which is involved in the new bond, is called the OH-reagent or the O-reagent....
The Echo liquid handler enables protein crystal formation with sitting drop volumes as small as 50 nL. Nanoliter volumes of protein and crystallography reagents can be transferred into sitting drop wells of crystallography plates. Precise and accurate drop placement eliminates crosscontamination and ensures drop-on-drop placement for blending protein and crystallography solutions. Precise trans...
Previous methods for the preparation of phosphorothioate-containing oligodeoxyribonucleotides rely on the reaction of phosphite triesters with sulfurizing reagents such as tetraethylthiuram disulfide (TETD) and 3H-1,2-benzodithiol-3-one 1,1-dioxide (Beaucage reagent). However, these and other sulfurizing reagents suffer from several disadvantages, and there is great impetus for the development ...
Scheme 2. Preparation of Fenbufen Of many organometallics, organozinc reagents have been found to be an excellent reagent for the cross-coupling reactions mainly due to the compatible functional group tolerance. More significantly, most of the organozinc reagents are easily prepared by either the direct insertion of zinc metal or transmetallation with zinc salts. In our continuing study on the ...
Here we demonstrate a multistep immunoassay using the controlled release of reagents patterned on a single porous membrane. Reagents are patterned, dried, and stored on-device for later rehydration, which removes the need for a cold chain and reduces user steps through the on-strip combination of signal enhancement reagents. The limit of detection for the malaria antigen Plasmodium falciparum h...
The protein structural entries grew far slower than the sequence entries. This is partly due to the bottleneck in obtaining diffraction quality protein crystals for structural determination using X-ray crystallography. The first step to achieve protein crystallization is to find out suitable chemical reagents. However, it is not an easy task. Exhausting trial and error tests of numerous combina...
Metering liquid reagents into reaction mixtures in a controlled and reproducible manner has often been a problem in synthetic chemistry. Carrying out the real simultaneous addition of two or more liquid reagents (concurrent additions) is even more inconvenient. Difficulties increase when addition volumes become small, when addition times become long, or when the reagents are corrosive or air-se...
Molecular recognition reagents are key tools for understanding biological processes and are used universally by scientists to study protein expression, localisation and interactions. Antibodies remain the most widely used of such reagents and many show excellent performance, although some are poorly characterised or have stability or batch variability issues, supporting the use of alternative b...
Since the discovery by Yagupolskii and co-workers that S-trifluoromethyl diarylsulfonium salts are effective for the trifluoromethylation of thiophenolates, the design and synthesis of electrophilic trifluoromethylating reagents have been extensively researched in both academia and industry, due to the significant unique features that trifluoromethylated compounds have in pharmaceuticals, agric...
aspect to take into consideration when choosing among reagents. Reconstituting a fresh vial of reagent daily dramatically increases costs when the majority of a previous vial is discarded. All reagents tested were relatively inexpensive, costing an average of US $3.00/mL (list price). In summary, all assays detected hypofibrinogenemia, although the BioMerieux reagent yielded slightly prolonged ...
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