نتایج جستجو برای: haloalkane pollutant
تعداد نتایج: 20504 فیلتر نتایج به سال:
Our fundamental understanding of proteins and their biological significance has been enhanced by genetic fusion tags, as they provide a convenient method for introducing unique properties to proteins so that they can be examinedin isolation. Commonly used tags satisfy many of the requirements for applications relating to the detection and isolation of proteins from complex samples. However, the...
Enzymes are widely used for the synthesis of pharmaceuticals, agrochemicals, and food additives because they can catalyze enantioselective transformations. Understanding the molecular basis of enzyme–substrate interactions that contribute to enantioselectivity is important for constructing selective enzymes by protein engineering. Up to now, emphasis has been on reactions such as lipaseor ester...
Using a combined strategy of random mutagenesis of haloalkane dehalogenase and genetic engineering of a chloropropanol-utilizing bacterium, we constructed an organism that is capable of growth on 1,2,3-trichloropropane (TCP). This highly toxic and recalcitrant compound is a waste product generated from the manufacture of the industrial chemical epichlorohydrin. Attempts to select and enrich bac...
This Communication reports simultaneous tracking of structural and kinetic information for the photoinduced elimination reaction of 1,2-diiodotetrafluoroethane in solution by transient X-ray diffraction. The transient structure of .CF2CF2I is determined to be a classical mixture whereas .CH2CH2I is bridged. Compared with the gas phase reaction, the secondary dissociation of .CF2CF2I into C2F4 a...
CNDO/2 calculations have been carried out on a series of haloalkane-aromatic 1 : 1 complexes in the ground and first excited singlet states and one 2 : 1 complex in the ground state. Calculated stabilities agree very well with reported experimental results for the ground state. Our calculations indicate that the substituent effect on complex stability in excited states will be the opposite of t...
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