An efficient design of in situ combustion depends on accurate kinetic modeling of the crude oil oxidation. The kinetic triplet of the oxidation reactions of a heavy oil sample was investigated. Once the kinetic triplet is known, the kinetic equation would be deconvolved. The crude oil sample was obtained from Kuh-E-Mond reservoir, located in the southwest of Iran. The samples were analyzed usin...

The NADPH-dependent reduction of rat hepatic microsomal cytochrome P-450 has been studied as a function of temperature. In the temperature range 4-37’ the reduction reaction was found to be biphasic and composed of two concurrent first order processes. This phenomenon was observed with microsornes from untreated and phenobarbital-induced animals in the presence or absence of exogenous Type I su...

Photosystem II (PSII) produces dioxygen from water in a four-stepped process, which is driven by four quanta of light and catalysed by a Mn-cluster and tyrosine Z. Oxygen is liberated during one step, coined S(3)=>S(0). Chemical intermediates on the way from reversibly bound water to dioxygen have not yet been tracked, however, a break in the Arrhenius plot of the oxygen-evolving step has been ...

Heat shock at 42 degrees caused a rapid inhibition of protein synthesis in Reuber H35 hepatoma cells. Inhibition was maximal within 5 min after the temperature was increased. After heat shock at 42 degrees for 30 min, protein synthesis was restored in 4 to 5 hr. Heat shock did not inhibit amino acid transport or cause a decrease of cellular amino acid pools, excluding a direct effect of these p...

The effect of temperature in the range from 10 to 35 degrees C on various characteristics of phosphoenolpyruvate carboxylase from the leaves of a CAM plant, Crassula argentea and a C(4) plant Zea mays shows a number of different effects related to the environment in which these distinct types of metabolic specialization normally operate. The Arrhenius plot of V(max) for the two enzyme forms sho...

Heat shock at 42°caused a rapid inhibition of protein synthesis in Reuber H35 hepatoma cells. Inhibition was maximal within 5 min after the temperature was increased. After heat shock at 42°for 30 min, protein synthesis was restored in 4 to 5 hr. Heat shock did not inhibit amino acid transport or cause a decrease of cellular amino acid pools, excluding a direct effect of these parameters on t...

thermal rearrangement of 7,7-dichloro-[a,c]-dibenzo-[4,1,0]-bicycloheptane (1) to 5,6-dichloro-5hdibenzo-[a,c]-cycloheptene (2) was studied in the solid phase and in solvents with different polarities. thefirst-order constants at various temperatures for the rearrangement process were evaluated from theabsorption time data. the activation parameters for this rearrangement were obtained from the...

Intrinsic membrane proteins, which may only be solubilized by procedures that disrupt membrane structure, must all have domains that interact with their non-polar environment. The degree of interaction, however, varies from a strict requirement of phospholipid for activity (e.g. Ca2+-activated adenosine triphosphatase; Warren et al., 1974) t o a requirement for structural support only (e.g. cyt...

Abstract We investigated the growth mechanism of 2D Mo2C crystals by chemical vapor deposition (CVD) under various time and temperature conditions. The kinetics on Cu via were using a modified Johnson-Mehl-Avrami-Kolmogorov (JMAK) model. To analyze surface coverage, we employed scanning electron microscopy (SEM) applied model to determine rate activation energy. exhibited temperature-dependent ...

Li-ion batteries show a minimum of their aging rate at certain temperature. This in the corresponding Arrhenius plot expresses longest cycle life C-rate. By characterizing laboratory-made pouch cells and commercial 21700 as function C-rate ambient temperature, we confirm that this indeed shifts with charging Increasing C-rates lead to higher optimal temperatures respect rate. The differences be...