INDEX decomposition

Dobrynin, A.A. (2003) On the Wiener index decomposition for catacondensed benzenoid graphs. Indian J. Chem., 42, 1270-1271. 

Sheng Y.X. et al. 2012. Index decomposition of dangerous chemical processes risk rank for petroleum chemical enterprise. Journal of Scfety Science and Technology 8(3) 97-101. 

In Table 1 the experimental data (weight average of molar mass, polydispersity index, decomposition temperature and heat of decompositioiO of polymers with varius add groups — OR (see equ.l) and different stereochemistry are listed. It can be seen, that the decomposition temperature decreases from ca. 390 °C for poly(emfo,endo-2,3-diacetoxy-5-norbomene), polymer 1 b, down to ca. 270 C for poly(e >,exo 5-norbomene-23-bis(methylcarbonate)), pofymer 3 a. As erqpected, the polymers from the exo,eco-isomers decomposed at lower temperatures as the endo,endo- sova.cK because the thermal elimination reaction is a typical syn-elimination ... 

The low molecular weight materials produced by this process are used as lubricants, whereas the high molecular weight materials, the polyisobutylenes, are used as VI improvers and thickeners. Polybutenes that are used as lubricating oils have viscosity indexes of 70—110, fair lubricating properties, and can be manufactured to have excellent dielectric properties. Above their decomposition temperature (ca 288°C) the products decompose completely to gaseous materials. 

Polytetrafluoroethylene decomposition products thermal decomposition of the fluorocarbon chain in air leads to the formation of oxidized products containing carbon, fluorine and oxygen. Because these products decompose in part by hydrolysis in alkaline solution, they can be quantitatively determined in air as fluoride to provide an index of exposure. No TLV is recommended pending determination of the toxicity of the products, but air concentration should be minimal. (Trade names Algoflon, Fluon, Teflon, Tetran.)... 

Success Likelihood Index Method/Multi-Attribute Utility Decomposition (SUM-MAUD)... 

To a solution of 93.8 g of the monoglycol ester in 500 ml of benzene, there are added 55 g of nicotinic acid chloride and 25 g of trimethylemine dissolved in 200 ml of benzene. The solution is stirred gently at a temperature of 60°C for two hours. After this time, the solution is cooled and washed successively with water, dilute hydrochloric acid, dilute ammonia and water until neutrality, it is dried over anhydrous sodium sulfate, and the sol vent Is evaporated under vacuum In this wey llOg of glycol 2-(p-chlorophenoxy)-2-methylpropionate nico-tlnate Is prepared, which represents a yield of 84%. The product is a sllghly yellow oil having a refraction index of no = 1.5422 and which is distilled with decomposition et 214°C at a pressure of 0.3 mm. 

Referring to the definition (1.5) of the cycle index we find further two permutation groups are combinatorially equivalent if and only if there exists a unique correspondence between the permutations of the two groups such that corresponding permutations have the same type of cycle decomposition. 

The LDPE reactor is sometimes termed heat transfer limited in conversion. While this is true, the molecular weight (or melt index)—conversion relationship is not since this work shows that a selected initiator can allow conversion improvements to be made under adiabatic conditions for a specified molecular weight. The actual limitation to conversion is the decomposition temperature of the ethylene and given that temperature as a maximum limitation, an initiator (not necessarily commercial or even known with present initiator technology) can be found which will allow any product to be made at the rate dictated by this temperature. Conceptually, this is a constant (maximum) conversion reactor, runnirg at constant operating conditions where the product produced dictates the initiator to be used. 

This decomposition suggests the strategy for parallel computing. In the simplest implementation, we distribute the job over processors, where Nk is the number of K values in our problem. Each processor is labeled by an index, k = 0,1,..., Nk — 1, associated with a particular value of K. We distribute the wave packet vector, v, over the processors such that processor k contains v( , k) and is responsible for everything related to its propagation, in particular, for computing the action of on v( , fe). Except for the work associated with the Coriolis terms, all of the computation is done locally on each processor, proceeds independently, and involves no communication. 

Decomposition Procedures for the Solving of Large Scale Systems W. P- Ledet and D. M. Himmelblau The Formation of Bubbles and Drops R. Kumar and N. R. Kuloor Author Index—Subject Index... 

D. R. Stull11 developed a rating system to establish the relative potential hazards of specific chemicals the rating is called the reaction hazard index (RHI). The RHI is related to the maximum adiabatic temperature reached by the products of a decomposition reaction. It is defined as... 

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