Non-isothermal kinetics of solid phase cyclodehydration of polymic acids

Определены формально-кинетические характеристики термораспада нитро-нитрозоаминов и их смесей с октогеном. Реакция разложения нитрозоаналогов октогена и нитро-нитрозопроизводных тетраазадекалина характеризуется меньшей энергией активации по сравнению с октогеном, и протекает с большей скоростью. Проведен анализ активационных параметров термораспада смесей, установлено активирующее влияние нитрозопроизводных тетраазадекалина на разложение октогена. The formal-kinetic characteristics of the thermal decomposition of nitro-nitrosoamines and their mixtures with HMX have been determined. The decomposition reaction of nitroso analogs of HMX and nitro-nitroso derivatives of tetraazadecalin is characterized by a lower activation energy compared to HMX, and proceeds at a higher rate. The analysis of the activation parameters of the thermal decomposition of the mixtures was carried out, the activating effect of the nitroso derivatives of tetraazadecalin on the decomposition of HMX was established.

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Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

Journal of Chemistry and Chemical Sciences ◽

10.29055/jccs/643 ◽

2018 ◽

Vol 8 (3) ◽

pp. 585-594

Author(s):

Khdbudin Mulani ◽

Ravindra Ghorpade ◽

Surendra Ponrathnam ◽

Nayaku Chavan ◽

Kamini Donde

Keyword(s):

Free Radical ◽

Radical Polymerization ◽

Free Radical Polymerization ◽

Isothermal Kinetics ◽

Kinetics Of

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Effect of particle size distribution on the kinetics of solid phase-gas reactions

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19751119 ◽

1975 ◽

Vol 40 (4) ◽

pp. 1119-1125 ◽

Cited By ~ 2

Author(s):

J. Skřivánek ◽

J. Šubrt

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Solid Phase ◽

Effect Of Particle Size ◽

Gas Reactions ◽

Kinetics Of

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Isobaric and isothermal kinetics of gelatinization of waxy maize starch

Journal of Food Engineering ◽

10.1016/j.jfoodeng.2007.02.056 ◽

2007 ◽

Vol 82 (4) ◽

pp. 443-449 ◽

Cited By ~ 11

Author(s):

Shyam S. Sablani ◽

S. Kasapis ◽

Z.H. Al-Tarqe ◽

I. Al-Marhubi ◽

M. Al-Khuseibi ◽

...

Keyword(s):

Isothermal Kinetics ◽

Maize Starch ◽

Waxy Maize ◽

Kinetics Of

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A Study of the Impact of Graphite on the Kinetics of SPS in Nano- and Submicron WC-10%Co Powder Compositions

Ceramics ◽

10.3390/ceramics4020025 ◽

2021 ◽

Vol 4 (2) ◽

pp. 331-363

Author(s):

Eugeniy Lantcev ◽

Aleksey Nokhrin ◽

Nataliya Malekhonova ◽

Maksim Boldin ◽

Vladimir Chuvil'deev ◽

...

Keyword(s):

Activation Energy ◽

Solid Phase ◽

Continuous Heating ◽

Diffusion Creep ◽

Hard Alloys ◽

Fine Grained ◽

Plasma Sintering ◽

Spark Plasma ◽

The Impact ◽

Kinetics Of

This study investigates the impact of carbon on the kinetics of the spark plasma sintering (SPS) of nano- and submicron powders WC-10wt.%Co. Carbon, in the form of graphite, was introduced into powders by mixing. The activation energy of solid-phase sintering was determined for the conditions of isothermal and continuous heating. It has been demonstrated that increasing the carbon content leads to a decrease in the fraction of η-phase particles and a shift of the shrinkage curve towards lower heating temperatures. It has been established that increasing the graphite content in nano- and submicron powders has no significant effect on the SPS activation energy for “mid-range” heating temperatures, QS(I). The value of QS(I) is close to the activation energy of grain-boundary diffusion in cobalt. It has been demonstrated that increasing the content of graphite leads to a significant decrease in the SPS activation energy, QS(II), for “higher-range” heating temperatures due to lower concentration of tungsten atoms in cobalt-based γ-phase. It has been established that the sintering kinetics of fine-grained WC-Co hard alloys is limited by the intensity of diffusion creep of cobalt (Coble creep).

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Effect of maturity of Napier grass (Pennisetum purpureum) hay on intake, digestibility, and rumen dynamics when given to zebu bulls

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200001459 ◽

2000 ◽

Vol 2000 ◽

pp. 144-144

Author(s):

A.J. Ayala-Burgos ◽

F.D.DeB. Hovell ◽

R.M. Godoy ◽

Hamana S. Saidén ◽

R. López ◽

...

Keyword(s):

Liquid Phase ◽

Solid Phase ◽

Napier Grass ◽

Pennisetum Purpureum ◽

Ad Libitum ◽

The Tropics ◽

Kinetics Of

Cattle in the tropics mostly depend on pastures. During dry periods the forage available is usually mature, constraining both intake and digestion. These constraints need to be understood, for intake and digestibility define productivity. Intake depends on the rumen space made available by fermentation and outflow. Markers such as PEG (liquid phase), and chromium mordanted fibre (solid phase) can be used to measure rumen volume and outflow, but have limitations. The objective of this experiment was to measure intake, digestibility, and rumen kinetics of cattle fed ad libitum forages with very different degradation characteristics, and also to compare rumen volumes measured with markers with those obtained by manual emptying.

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Kinetics of arsenic-enhanced solid phase epitaxy in silicon

Journal of Applied Physics ◽

10.1063/1.1682672 ◽

2004 ◽

Vol 95 (8) ◽

pp. 4427-4431 ◽

Cited By ~ 12

Author(s):

B. C. Johnson ◽

J. C. McCallum

Keyword(s):

Solid Phase ◽

Solid Phase Epitaxy ◽

Kinetics Of

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Isothermal and non-isothermal kinetics of hydrolysis of 1-[2-(2- pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]- perhydroazepinium chloride (BK 129)

Acta Facultatis Pharmaceuticae Universitatis Comenianae ◽

10.2478/afpuc-2013-0018 ◽

2013 ◽

Vol 60 (2) ◽

pp. 43-48

Author(s):

Stankovičová M. ◽

Bezáková Ž. ◽

Beňo P. ◽

Húšťavová P.

Keyword(s):

Biological Activity ◽

Alkaline Hydrolysis ◽

Functional Group ◽

Isothermal Kinetics ◽

Basic Part ◽

Buffer Solutions ◽

Kinetics Of Hydrolysis ◽

Short Time ◽

Kinetics Of ◽

Hydrolysis Of

Abstract The substance BK 129 - 1-[2-(2-pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]-perhydroazepinium chloride was prepared in terms of influence of the connecting chain between the carbamate functional group and the basic part of molecule on biological activity. Such a structural feature is important with regard to its stability. In this work we determined the rate constants of alkaline hydrolysis of this compound at increased temperature under isothermal and non-isothermal conditions. The hydrolysis was also performed in buffer solutions with the purpose of evaluating its stability. Non-isothermal tests of stability enable to reduce the number of analyses. The necessary data for stability of compound are in this way achieved in a short time.

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