... disruption in catalytic function, with a kcatreduction of more than99% and a 20-fold increase in Km. The introducedchanges resulted in a 1300- and 2200-fold decrease inthe catalytic efficiency ... correlated with the decrease in catalytic effi-ciency (Fig. 5C). An alteration (increase or decrease)in volume of the amino acid at position 266 induced adecrease in catalytic efficiency of the enzyme. ... alteration of the amino acid volumedecreases the catalytic efficiency, suggesting that thesesteric considerations may be a requirement for high catalytic efficiency. The mutations did not produce...
... sequence encoding the catalytic module (Glu1–Thr371) of H. jecorina Cel7B (Cel7Bcat) was expressedunder the control of the gpdA promotor from Aspergillusnidulans as described previously [19] ... QM9414-Cel7BcatN182Q. Transformation and selection was per-formed as described by Collen et al. [19], based upon themethod described by Penttila¨et al. [20].The strains H. jecorina QM9414-Cel7Bcatand ... similar modular structure comprisedof a catalytic module connected to a carbohydrate-bindingmodule (CBM) by a flexible linker peptide. The 3D structuresof the catalytic modules of Cel7A (formerly...
... Ferredoxin-NADP(H) reductase catalytic mechanism (Eur. J. Biochem. 270) 1903[20–23,27–33]. At the other extreme of the spectrum,Piubelli et al. [50] have described a site-directed mutant ofpea ... sevenfoldincrease of catalytic competence for NADPH in theferricyanide-dependent diaphorase reaction. The kcat/Kmratio, usually employed as a quantitative estimation of the catalytic efficiency ... strongly conserved at the corres-ponding position in the vast majority of FNR proteinsdescribed so far. Catalytic competence is obviously not the only trait thatdetermines the evolutionary success...
... the reactor core components, since as the power for all the reactor core components, since as the power distribution in the reactor changes due to fuel burn-up or core distribution in the reactor ... in following figure III.1.THERMAL-HYDRAULIC IN NUCLEAR REACTOR In nuclear reactor cores the axial power distribution may In nuclear reactor cores the axial power distribution may have various ... IN NUCLEAR REACTOR IX. Heat conduction in fuel assemblyIX. Heat conduction in fuel assembly Modern nuclear power reactors contain cylindrical fuel Modern nuclear power reactors contain...
... NG NGUY NGHIÊN CU NG DNG CÔNG NGH MBBR (MOVING BED BIOFILM REACTOR) X C THI SN XUT BIA Chuyên ngành : Công ngh ng MSHV : ... system encountered many difficulties. This research was studied on application of Moving Bed Biofilm Reactor for brewing wastewater treatment, given more options for upgrading existing wastewater ... nh tính cn thit khi la ch tài: “Nghiên cứu ứng dụng công nghệ MBBR(Moving Bed Biofilm Reactor) để xử lý nước thải sản xuất bia”. 2. Tng quan 31 s c các vi sinh...
... pellets inside a reactor (column ortube). In such fixed -bed reactors, the conventional way to achieve the appropriateTable 2.1 Slurry reactors versus conventional fixed -bed reactorsN Compared ... conventional types of fixed -bed reactors, which are mainlyemployed for multiphase processes: Trickle -Bed Reactors (TBRs), Bubble(packed) Column Reactors (BCRs), and MultiTubular Reactors (MTRs).Some ... Compared features Slurry reactor Fixed- bed reactors1 Reaction performance1.1 Overall reaction rate related to the catalystmassHigh Low1.2 Overall reaction rate related to the reactor volume (or...
... the flexible catalytic loop [12]. The flexible catalytic loop of PRibPP synthase is topologically andfunctionally equivalent to a loop, variously designatedthe flexible loop, the catalytic loop, ... allelesspecifying alanine substitutions of the flexible catalytic loopThe codons of the flexible catalytic loop were alteredindividually to specify alanine as described in Experi-mental procedures. Each of ... synthase mutant forms with the individualamino acids of the flexible catalytic loop altered toalanine with emphasis on the two catalytic residuesLys197 and Arg199.ResultsComplementation of Dprs...
... a fixed database role inherits all the permissions specified by the role. A person can belong to multiple roles, if necessary. Steps A fixed database role is similar in some ways to the fixed ... dialog box by clicking on its OK button. Comments The fixed database roles are not to be confused with the similar fixed server roles. Each fixed database role applies only to a single database. ... in this chapter. The difference is that fixed database roles determine permissions to perform operations on objects within a single database, whereas fixed server roles specify the administrative...
... 2-hexadecanone was obtained in 4 and 2 h, respectively, with a Catalytic oxidations in aqueous media - recent developments261 catalytic process, preferably with water as one of the phases, for ... reactions would be the use of or as oxidants in a biphasicChapter 8 Catalytic oxidations in aqueous media - recentdevelopments Catalytic oxidation of organic compounds is an extremely important ... could be recycled with no apparent loss of activity.Perhaps the most important recent discovery in catalytic oxidation ofalcohols is the use of a catalyst prepared from and sulfonatedbatophenanthroline...