Reaction calculations

Problem 1.1a: For a reaction AB (rate expression: rA = kCA ) , taking place in an isothermal tubular reactor, starting with the mass balance equation and assuming plug flow, derive an expression for calculating the reactor volume in terms of the molar flow rate of reactant ‘A’.
0p sofia11 17052012 45 14 Download

One of the main missions of the Abdus Salam International Centre for Theoretical Physics in Trieste, Italy, founded in 1964, is to foster the growth of advanced studies and scientific research in developing countries. To this end, the Centre organizes a number of schools and workshops in a variety of physical and mathematical disciplines.
287p camnhung_1 13122012 31 6 Download

The science of catalytic reaction engineering studies the catalyst and the catalytic process in the laboratory in order to predict how they will perform in productionscale reactors. Surprises are to be avoided in the scaleup of industrial processes. The laboratory results must account for flow, heat and mass transfer influences on reaction rate to be useful for scaleup. Calculated performance based on these results must also be useful to maximization of profit and safety and minimization of pollution.
294p transang5 23112012 34 4 Download

A method has been developed to predict the effects of mutations in the p53 cancer suppressor gene. The new method uses novel parameters combined with previously established parameters. The most important parameter is the stability measure of the mutated structure calculated using molecular modelling.
14p vinaphone15 25022013 11 1 Download

The earthquake motion is assigned classified by Japan's land area is classified into three categories according to level seismic risk and adjust the seismic motion by using the regional adjustment factor of 1.0, 0.85 and 0.7 depending on the classification of the area. Meanwhile, the studies to calculate seismic waveforms unique to the target area of seismic design has been conducted in recent years.
530p lulanphuong 24032012 71 21 Download

When analyzing kinetic data or designing a chemical reactor, it is important to state clearly the definitions of reaction rate, conversion, yield, and selectivity. For a homogeneous reaction, the reaction rate is defined either as the amount of product formed or the amount of reactant consumed per unit volume of the gas or liquid phase per unit time. We generally use moles (g mol, kg mol, or lb mol) rather than mass to define the rate, since this simplifies the material balance calculations.
429p nhulan0908 03102012 46 12 Download

Much faster alkylation of enolate anions can often be achieved in dimethylformamide (DMF), dimethylsulfoxide (DMSO) or 1,2dimethoxyethane (DME) than in the usual protic solvents. The presence of hexamethylphosphoramide (HMPA) or a triamine or tetramine can also enhance the rate of alkylation. This is thought to be because of the fact that these solvents or additives solvate the cation, but not the enolate, thereby separating the cation–enolate ion pair. This leaves a relatively free enolate ion, which would be expected to be a more reactive nucleophile than the ion pair.
0p taisaocothedung 12012013 26 3 Download

There is growing recognition among academics and practitioners that the risk and return characteristics of human capital—such as wage and salary profiles— should be taken into account when building portfolios for individual investors. Wellknown financial scholars and commentators have pointed out the importance of including the magnitude of human capital, its volatility, and its correlation with other assets into a personal risk management perspective.2 Yet, Benartzi (2001) showed that many investors invest heavily in the stock of the company they work for.
211p mebachano 01022013 27 2 Download

It is necessary for concrete structure with mass section to have a rational crack control plan based on analysis of thermal stress from hydration heat. Because mass concrete can cause crack to deteriorate durability of structure. So, this study reports two examples: one is a process to calculate an adiabatic temperature rise and a reaction rate for evaluate thermal stress.
7p mualan_mualan 27022013 14 2 Download

The divalent metal transporter (DMT1) is a 12transmembrane domain protein responsible for dietary iron uptake in the duodenum and iron acquisition from transferrin in peripheral tissues. The transmembrane domain 4 (TM4) of DMT1 has been shown to be crucial for its biological function. Here we report the 3D structure and topology of the DMT1TM4 peptide by NMR spectroscopy with simulated annealing calculations in membranemimetic environments, e.g. 2,2,2trifluoroethanol and SDS micelles.
14p dell39 03042013 12 2 Download

Gomesin is the ﬁrst peptide isolated from spider exhibiting antimicrobial activities. This highly cationic peptide is composed of 18 aminoacid residues including four cysteines forming two disulﬁde linkages. The solution structure of gomesin has been determined using proton twodimensional NMR (2DNMR) and restrained molecular dynamics calculations. The global fold of gomesin consists in a wellresolved twostranded antiparallel b sheet connected by a noncanonical b turn.
9p research12 01062013 11 2 Download

The basic properties of zeolites were studied by using quantumchemical calculations. The obtained results have demonstrated that the basicity of zeolites in the forms of alkali cations (Li, Na or K) is increased with increasing cation radius. While the Si/Al ratio in the framework increases, the basicity of zeolites decreases. The application of adsorption method using acidic gases (CO2) for determining basicity may be suitable for solid bases without exhanged ion, but not for zeolites.
6p uocvong04 24092015 15 3 Download

The gene encoding a subtilisinlike serine proteinase in the psychrotrophic Vibriosp. PA44 has been successfully cloned, sequenced and expressed in Escherichia coli.The gene is 1593 basepairs and encodes a precursor protein of 530 amino acid residues with a calculated molecular mass of 55.7 kDa. The enzyme is isolated, however, as an active 40.6kDa proteinase, without a 139amino acid residue Nterminal prosequence.
11p tumor12 22042013 20 1 Download

Volunteers Are a Valuable Financial Resource. A volunteer’s time is an important resource for many charities and congregations, especially those that do not have the money to hire labor to carry out certain tasks. Volunteer time is comparable to a monetary donation. Independent Sector, a national advocate for the nonprofit sector, computes annually an equivalent average hourly wage for a volunteer’s time. The calculation is derived from the average hourly wage of nonagricultural workers plus 12 percent for fringe benefits. By this calculation, the typical 2002 volunteer value was $16.
32p dacotaikhoan 26042013 15 1 Download

The article deals with a research on the design and manufacturing of a dynamic balancing machine, using dynamic load sensors and optical one, for calculating the unbalanced mass in thick rotating part on two choosen correction planes. Dynamic load sensors attached to the bearing supports of the machine help us determine the reaction forces generated by the unbalanced mass of the rotor. These load signals are filtered and digitized at a sampling rate which is synchronous to the rotor via an optical sensors.
6p meoden89nd 19012011 101 32 Download

If the text you're using for general chemistry seems to lack sufficient mathematics and physics in its presentation of classical mechanics, molecular structure, and statistics, this complementary science series title may be just what you're looking for. Written for the advanced lowerdivision undergraduate chemistry course, The Physical Basis of Chemistry, Second Edition, offers students an opportunity to understand and enrich the understanding of physical chemistry with some quantum mechanics, the Boltzmann distribution, and spectroscopy.
229p banhkem0908 24112012 57 25 Download

20 Robot Dynamics 20.1 20.2 Fundamentals of Robot Dynamic Modeling Basic Ideas • Robot Geometry • Equations of Dynamics Recursive Formulation of Robot Dynamics Velocities and Accelerations of Robot Links • Elimination of Reactions — Minimization of Dynamic Model Form • Calculation of Direct and Inverse Dynamics 20.3 20.4 20.
36p medinova 28102010 56 11 Download

The collective load is the basis for determining the average speeds (2,387 min–1) and the average driving speed (111 km/h). For each of the load cases the tooth load acting on the pinion and the reaction loads from the bearings have to be calculated both for forward and backward motion (percentage times 50 % each). In addition to these forces, the bearings are subjected to loads due to the rotor weight, the unbalanced magnetic pull, unbalanced loads and rail shocks. Of these loads only the rotor weight, GL, is known; therefore, it is multiplied by a supplementary factor fz = 1.
223p beobobeo 01082012 56 10 Download

McKay, Donald. "Advection and Reactions" Multimedia Environmental Models Edited by Donald McKay Boca Raton: CRC Press LLC,2001 CHAPTER 6 Advection and Reactions 6.1 INTRODUCTION In Level I calculations, it is assumed that the chemical is conserved; i.e., it is neither destroyed by reactions nor conveyed out of the evaluative environment by ﬂows in phases such as air and water. These assumptions can be quite misleading when determining of the impact of a given discharge or emission of chemical.
29p tuongmatdo 10122011 42 7 Download

The collective load is the basis for determining the average speeds (2,387 min–1) and the average driving speed (111 km/h). For each of the load cases the tooth load acting on the pinion and the reaction loads from the bearings have to be calculated both for forward and backward motion (percentage times 50 % each). In addition to these forces, the bearings are subjected to loads due to the rotor weight, the unbalanced magnetic pull, unbalanced loads and rail shocks. Of these loads only the rotor weight, GL, is known; therefore, it is multiplied by a supplementary factor fz = 1.5...2.
0p beobobeo 01082012 41 6 Download