Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Sequential moves

Let us start with aliphatic species and sequentially move the amino groups apart. We are seemingly thwarted immediately. There is no enthalpy of formation reported for methylenediamine (diaminomethane) CH2(NH2)2 (21), a species we recognize as the simplest polyaminoalkane. As such the exothermicity of reaction 22... [Pg.351]

Steeps are normally operated as countercurrent batteries of 6-12 tanks although, as mentioned earlier, much longer batteries are sometimes used. Process wash water containing 0.1-0.2% sulfur dioxide is placed on corn that has been in the steeps longest and, therefore, has the lowest residual solubles content. This process water is sequentially moved from tank to tank (from oldest corn to newest) while it decreases in sulfur dioxide content and increases in solubles. [Pg.395]

FIGURE 2.7. Doehlert design for two factors (at least seven experiments). Dotted line possibility for sequentially moving the design in the direction of the arrow by executing three additional experiments. [Pg.37]

In general, a simplex for/factors is a geometric figure in the /-dimensional factor space, defined by / + 1 points or vertices, that is, one more than the number of factors. During optimization, the simplex sequentially moves through the experimental domain in the direction of the optimum. The next simplex to be performed is based on the results of the previous, and is defined according to specific rules. [Pg.44]

There are several direct search techniques for minimizing a function of one variable. The methods generally start from an initial estimate and sequentially move toward the minimum. Univariate or line search techniques play a major role in solving subproblems in more complex direct search algorithms. [Pg.2547]

Fig. 6. The contact method (a) involves the introduction of two soon-to-be diffusing materials between substrates. Capillary action brings the liquid and solid in contact. This sets up an area of varying concentration due to diffusion (b) top. Upon Polymerization or cooling, this some part of this region may phase separate (b) bottom. The apertures seen in (b) can be sequentially moved to extract diffusion profiles (c) or phase diagrams (d) (from Ref. [84])... Fig. 6. The contact method (a) involves the introduction of two soon-to-be diffusing materials between substrates. Capillary action brings the liquid and solid in contact. This sets up an area of varying concentration due to diffusion (b) top. Upon Polymerization or cooling, this some part of this region may phase separate (b) bottom. The apertures seen in (b) can be sequentially moved to extract diffusion profiles (c) or phase diagrams (d) (from Ref. [84])...
Figure 1. Principle of the diffusion experiment. A small cylindrical stamp is covered with an ink reservoir to provide li near diffusion.Thestampis then sequentially moved forward on a gold substrate with a printing time of At. With each print, more substance arrives at the bottom to be adsorbed onto the gold. After a certain amount of time (and number of prints), sufficient ink reaches the gold to form a complete monolayer within At. Figure 1. Principle of the diffusion experiment. A small cylindrical stamp is covered with an ink reservoir to provide li near diffusion.Thestampis then sequentially moved forward on a gold substrate with a printing time of At. With each print, more substance arrives at the bottom to be adsorbed onto the gold. After a certain amount of time (and number of prints), sufficient ink reaches the gold to form a complete monolayer within At.
In point-by-point scanning Raman microscopy, the laser spot is focused onto the surface or along the axial axis of a sample and a spectrum of each spatial position is collected. Scans of microvolumes can be carried out subsequently along a line, as shown in Figure 7.6a. A controlled microdisplacement device allows a very high mechanical resolution of the position. The sample is sequentially moved from position to position and stays at rest for a given time to take the Raman spectrum. The integration time corresponds to the time delay taken at each point. [Pg.138]

Below we consider two possible sequences of moves simultaneous-move and sequential move (where the defender is the first mover). Both sequences have been studied in literature by e.g., Gao et al. (2013a), Shan and Zhuang (2013) and Bakir (2011). If the defense is public information and terrorists know the defense allocation before making the attacking decisions, a sequential-move model should be used. Otherwise, if both players make decisions at the same time, or at least they do not know the other player s choice at the time that they make their own decisions, a simultaneous-move model should be used. [Pg.214]

Definition 2. We call a pair At, best response function X defined as X = argmax U A,d). [Pg.214]

As an alternative to the random selection of particles it is possible to move the atom sequentially (this requires one fewer call to the random number generator per iteration) Alternatively, several atoms can be moved at once if an appropriate value for the maximun displacement is chosen then this may enable phase space to he covered more efficiently. [Pg.433]

There are seven commercial processes in operation six operate in the vapor phase. The Universal Oil Products process operates in the Hquid phase and is unique in the simulation of a moving bed. The adsorption unit consists of one vessel segmented into sections with multiple inlet and oudet ports. Flow to the various segments is accompHshed by means of a rotary valve which allows each bed segment to proceed sequentially through all the adsorption/desorption steps. [Pg.457]

Cellular protein biosynthesis involves the following steps. One strand of double-stranded DNA serves as a template strand for the synthesis of a complementary single-stranded messenger ribonucleic acid (mRNA) in a process called transcription. This mRNA in turn serves as a template to direct the synthesis of the protein in a process called translation. The codons of the mRNA are read sequentially by transfer RNA (tRNA) molecules, which bind specifically to the mRNA via triplets of nucleotides that are complementary to the particular codon, called an anticodon. Protein synthesis occurs on a ribosome, a complex consisting of more than 50 different proteins and several stmctural RNA molecules, which moves along the mRNA and mediates the binding of the tRNA molecules and the formation of the nascent peptide chain. The tRNA molecule carries an activated form of the specific amino acid to the ribosome where it is added to the end of the growing peptide chain. There is at least one tRNA for each amino acid. [Pg.197]

The massively parallel approach adopted in the Connection Machine has been termed data parallel. Whereas a uniprocessor must sequentially step through large amounts of data, a data parallel machine moves processors to the data. Aggregate memory to processor bandwidth in the Connection Machine is more than 700 megabytes per second. [Pg.97]

Before each wavelength scan, the grating locates itself by finding the 365 nm triplet of a built-in mercury light source, and then moves sequentially to the wavelengths for the elements to be determined. As an option the instrument... [Pg.777]

In the following four studies, the Pb and J parameters are to be varied systematically to reveal their influences on the properties recorded. The reader should now select, sequentially, the following four sets of rules, following the instructions for this in Chapter 10. Compare the behaviors of the molecules in each case with those observed for the neutral conditions prevailing in Example 2.2. Do the ingredients tend to move toward or away from one another Do they tend to stick together or separate ... [Pg.32]

Transport systems can be described in a functional sense according to the number of molecules moved and the direction of movement (Figure 41-10) or according to whether movement is toward or away from equilibrium. A uniport system moves one type of molecule bidirectionally. In cotransport systems, the transfer of one solute depends upon the stoichiometric simultaneous or sequential transfer of another solute. A symport moves these solutes in the same direction. Examples are the proton-sugar transporter in bacteria and the Na+ -sugar transporters (for glucose and certain other sugars) and Na -amino acid transporters in mammalian cells. Antiport systems move two molecules in opposite directions (eg, Na in and Ca out). [Pg.426]

Surface sampling should be augmented with 12-15 sequential samples taken down to 1.5 meters In order to determine If the pollutant has moved downward. These 12-15 additional samples should be located In the area of major contamination. [Pg.103]


See other pages where Sequential moves is mentioned: [Pg.215]    [Pg.3]    [Pg.150]    [Pg.483]    [Pg.130]    [Pg.40]    [Pg.41]    [Pg.824]    [Pg.27]    [Pg.38]    [Pg.108]    [Pg.109]    [Pg.215]    [Pg.3]    [Pg.150]    [Pg.483]    [Pg.130]    [Pg.40]    [Pg.41]    [Pg.824]    [Pg.27]    [Pg.38]    [Pg.108]    [Pg.109]    [Pg.450]    [Pg.313]    [Pg.25]    [Pg.256]    [Pg.435]    [Pg.51]    [Pg.29]    [Pg.155]    [Pg.1964]    [Pg.445]    [Pg.6]    [Pg.90]    [Pg.19]    [Pg.382]    [Pg.538]    [Pg.216]    [Pg.23]    [Pg.562]    [Pg.626]   
See also in sourсe #XX -- [ Pg.40 ]




SEARCH



© 2024 chempedia.info