The kinetic

Xem 1-20 trên 509 kết quả The kinetic
  • This paper studies the kinetics of oxygen reduction by reducing agent FOCOAR in an airtight minienvironment under isobaric conditions. The kinetics of the reduction process calculated according to the relation vav = [21 % - O 2 C (end) ] / tend, in which vav is average reduction rate, O 2 C (end) is oxygen concentration at the end of the experiment, tend is total time needed for the oxygen reduction experiment.

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  • Glutathionylspermidine is an intermediate formed in the biosynthesis of trypanothione, an essential metabolite in defence against chemical and oxi-dative stress in the Kinetoplastida. The kinetic mechanism for glutathionyl-spermidine synthetase (EC from Crithidia fasciculata (CfGspS) obeys a rapid equilibrium random ter-ter model with kinetic constants KGSH= 609lm, KSpd= 157lmand KATP= 215lm.

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  • (BQ) Part 1 book "An introduction to chemical kinetics" has contents: Introduction, experimental procedures, the kinetic analysis of experimental data, theories of chemical reactions, potential energy surfaces.

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  • The kinetics of lignin methylsulfonation in solution were studied by using differential scanning calorimetry (DSC) technique under an isothermal program, at 55, 65, 75 and 85 °C. It was found that the activation energy of the process was Eα = 41.26 kJ/mol, and the preexponential factor A was 1.85×103 s-1 .

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  • The studied domain, the whole Gulf of Tonkin, extends from the coastal zone of Quang-Ninh into ThuaThienHue province and as far as Hai-Nam (China) island seawards. The model have been calibrated and verified by the observed data at six different stations for a three and seven-day periods. The results are in good agreement with the obseved data. The kinetic energy distribution was eonsidered.

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  • Tham khảo tài liệu 'báo cáo hóa học: " atomic force microscopy investigation of the kinetic growth mechanisms of sputtered nanostructured au film on mica: towards a nanoscale morphology control"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Atomic force microscopy investigation of the kinetic growth mechanisms of sputtered nanostructured Au film on mica: towards a nanoscale morphology control

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  • Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: The Kinetics and Mechanism of the Core-shell Styrene-butyl Acrylate Polymerisation

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  • (BQ) Part 2 book "Atkins’ physical chemistry" has contents: Molecular spectroscopy 3 - Magnetic resonance, molecular interactions, molecules in motion, the rates of chemical reactions, the kinetics of complex reactions, molecular reaction dynamics, processes at solid surfaces...and other contents.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Atomic Force Microscopy Study of the Kinetic Roughening in Nanostructured Gold Films on SiO2

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  • Within the framework of the Walecka model (QHD-I)[1] the renormalized effective Dirac equation and the kinetic equation for fermion are presented. In fact, the fermion propagator in the medium is dramatically different from that in the vacuum. The main feature is the treating of the fermion distribution in non equilibrium, which depends on the interaction rate involving temperature.

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  • Although the chemical nature of the catalytic mechanism of the serine pro-tease a-chymotrypsin (a-CT) is largely understood, the influence of the enzyme’s structural dynamics on its catalysis remains uncertain. Here we investigate whether a-CT’s structural dynamics directly influence the kinet-ics of enzyme catalysis.

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  • Our calculated results demonstrate that the transition between the lowspin (LS) and high-spin (HS) states of these Fe2+ molecules is accompanied with redistribution of atomic charge and reformation of molecular orbitals. These cause differences in the kinetic energy, the electrostatic energy as well as the total energy between the LS and HS states. The LS state is advantage in the kinetic energy in comparison to the HS state, while the HS state is advantage in the electrostatic energy.

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  • Chemical Kinetics The area of chemistry that concerns reaction rates. .Reaction Rate Change in concentration (conc) of a reactant or product per unit time. conc of A at time t2 − conc of A at time t1 Rate = t2 − t1 ∆A =

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  • We live in the age of biology—the human and many other organisms’ genomes have been sequenced and we are starting to understand the function of the metabolic machinery responsible for life on our planet. Thousands of new genes have been discovered, many of these coding for enzymes of yet unknown function. Understanding the kinetic behavior of an enzyme provides clues to its possible physiological role. From a biotechnological point of view, knowledge of the catalytic properties of an enzyme is required for the design of immobilized enzyme-based industrial processes.

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  • This first part is concerned with processes in which the kinetic behaviour of a gaseous phase is rate-determining. The range of processes includes some which are carried out in vacuum systems in which Knudsen or free evaporation occurs from a condensed phase, to transport reactions where a chemical reaction occurs between a solid and the gaseous phase to produce molecular species containing some or all of the elements occurring in the solid phase.

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  • Comprehensive manual embracing essentially all the classical and modern areas of chemical kinetics. Provides details of modern applications in chemistry, technology and biochemistry. Special sections of the book treat subjects not covered sufficiently in other manuals, including: modern methods of experimental determination of rate constants of reactions including laser pico- and femtochemistry, magnetochemistry, and ESR; and descriptions of advanced theories of elementary chemical processes.

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  • A- Định Nghĩa: Run là một cử động không tự ý của bất kỳ bộ phận nào trên cơ thể (ngay cả đầu và tiếng nói cũng có thể bị ảnh hưởng). Run thường được nhận thấy rõ nhất là ở tay. Có 3 loại run chính như sau 1. Run lúc nghỉ ngơi hoặc run “tĩnh” (static tremors) xảy ra khi tay hoặc một bộ phận nào đó đang trong giai đoạn nghỉ ngơi. 2.

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  • The Physical Chemistry In Brief offers a digest of all major formulas, terms and definitions needed for an understanding of the subject. They are illustrated by schematic figures, simple worked-out examples, and a short accompanying text. The concept of the book makes it different from common university or physical chemistry textbooks. In terms of contents, the Physical Chemistry In Brief embraces the fundamental course in physical chemistry as taught at the Institute of Chemical Technology, Prague, i.e.

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  • enzymes are powerful biological catalysts that are essential for the proper maintenance and propagation of any organism. these properties make them excellent candidates as therapeutic targets to combat diseases of either genetic or pathogenic origin. in this regard, one goal of molecular medicine is to develop and implement effective agents that can modulate the activity of various enzymes involved in essential biological pathways. the process of developing and characterizing these small molecules, i.e., rational drug design, often requires a priori knowledge of the enzyme in question....

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