Stoichiometry ratios

Figure 7.11 shows a ternary diagram for a system with components 1-3 and 2-3 immiscible in all proportions at solid state. However, here components 1 and 2 form an intermediate compound with fixed stoichiometry (ratio 30 70). 

TNT. A similar relation is reported for brisance by Trauzl test. In dry mixts the expln efficiency decreases with increasing TNT content (as a result of incomplete reaction), and increases in the case of w-filled expls. The author concludes that for dry mixts the stoichiometry ratio of components prevails, while in w-filled samples the brisance effect is greater for mixts rich in TNT] 2) Y. Bernard et al, Detonation Characteristics of Liquid Nitropropane n—Nitric Acid Mixtures , CR, AcadSciParis, Ser A, B293B (20), 1096-99 (1966) (Fr) CA 68,39485 (1967) [The authors report on the deton parameters of the subject mixt. They found that the deton vel ( 6.5km/sec) decreases linearly with increasing initial temp (0 to 29°) and w content. The calcd deton pressure for the reaction (including w) is of the order of 140kilobars]... 

Semilogarithmic plots of formation pressure versus reciprocal absolute temperature yield straight lines, over limited temperature ranges, for hydrate formation from either liquid water, or ice. From Equation 4.13 such linear plots either indicate (1) relatively constant values of the three factors (a) heat of formation, AH, (b) compressibility factor, z, (c) stoichiometry ratios of water to guest or (2) cancellation of curvilinear behavior in these three factors. 

Complex I mediates electron transfer from NADH + H+ to coenzyme Q. The consequent reduction of coenzyme Q is coupled to vectorial proton transport the H+/e stoichiometry (ratio) has been variously estimated to be 1.0, 1.5, and 2.0. 

Compare molar amounts using stoichiometry ratios from the balanced equation. Solve for the unknown molar amount. 

Metallic nitrides, sometimes termed interstitial compounds, are formed from combinations of N with transition metals of groups IVA, VA, and VIA. As the name implies, they exhibit electrical conductivity and most of the general characteristics associated with standard metals. They are also refractory and hard, and usually depart from the ideal stoichiometry ratios displayed above (see 17.3.9, Table 1). They readily form solid solutions with carbides and oxides, which gives rise to problems when it is necessary to obtain nitrides in pure form. Included in this category are numerous ternary nitrides of a transition metal with a group B metal. 

The stoichiometry and association constants of the inclusion complexes formed between BPHTs and CDs were classically calculated by means of the Scatchard and Benesi-Hildebrand methods [101,102]. Assuming a 1 1 stoichiometry ratio, the following equilibrium 1 is established ... 

CO chemisorption at 308 K was used to measure the metal dispersion and a stoichiometry ratio of M/CO (M = Pd or Pt) = 1 1 was assumed in the calculation for both Pt and/or Pd. Due to the possible formation of Pd hydride and the uncertainty on the metal to hydrogen ratio, hydrogen chemisorption was not used. Our previous results on Pd/MPS catalysts showed that the hydrogen concentration during reduction has little influence on the dispersion obtained. 

It is generally reed that the stoichiometry ratio of the three extrinsic proteins (33, 23 and 17 kDa) is 1 1 1. However, the question of the stoichiometry of the 33 kDa protein in relation to the PSII reaction center has been an unsetded subject. Eady investigations su ested that anywhere from 1 to 3 copies of the protein might be present in PSII. Later investigations using biochemical methods to quantify the level of the protein showed that two copies were present in spinach PSII preparations. - ovos challenged by Nield, who reported on the... 

Dalai and coworkers studied the adsoiption/oxidation of MM on Hydrodacro activated carbon. The experiments were carried out at elevated temperatures (323 48 K) at the pressure range between 122 and 364 kPa with the various contents of oxygen (O2/CH3SH ifom 1.1 to 1.33 times the stoichiometry ratio) [132]. At these conditions DMDS and small amounts of CO2 were formed. While the latter is likely the product of carbon surface oxidation, the conversion rate of MM increased with an increasing temperature and 99% was achieved at 373 K. It was found that... 

Analogous polymer can be synthesized including different units and CD with different stoichiometry ratios (Fig. 6.9). Some of them are hydrophobic. It is noted that the size of object is matched with the size of the cavity of CD. 

Polarization curves are usually measured at a constant oxygen stoichiometry ratio A rather than at a constant /3. Integrals (6.101)-(1.103) can be transformed to the case of constant A using the identity [3 = /umA, and we get [31]... 

Table I. Stoichiometry ratios obtained by SPMS for various aerosois and conqtarison with theoretical vaiues.

The experimental evidence that photosystem stoichiometry ratios (PSIl/PSI) differed from "strict unity" (and showed large variations among different photosynthetic membranes) was contrary to the conventional assumption based on the Z-scheme. Inevitably, the question was raised whether these variations in photosystem stoichiometry constituted a random phenomenon or a specific adaptation response of the plants. Examination of different aspects of this phenomenon argues strongly in favor of the latter. 

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