In article, we have reported a thermodynamic based study of aqueous solvation benzoic acid (C6H5COOH) at 288 to 318 Kelvin temperature. At this temperature range the dissociation constant (Ka) into solvent has been determined by applying titration method against standard basic solution NaOH different ionic strength NaCl. Although, in observation, value Ka is being inversely proportional respect...

Honeybee larvae and pupae are extremely stenothermic, i.e. they strongly depend on accurate regulation of brood nest temperature for proper development (33-36 degrees C). Here we study the mechanisms of social thermoregulation of honeybee colonies under changing environmental temperatures concerning the contribution of individuals to colony temperature homeostasis. Beside migration activity wit...

Nano zerovalent iron (nZVI) is an effective adsorbent for removing various organic and inorganic contaminants. In this study, nZVI particles were used to investigate the removal of Cd(2+) in the concentration range of 25-450 mg L(-1). The effect of temperature on kinetics and equilibrium of cadmium sorption on nZVI particles was thoroughly examined. Consistent with an endothermic reaction, an i...

This report summarizes the main findings of an AFOSR Basic Research Initiative project in the area ofendothermic fuels catalysis. The focus was on developing improved catalysts to enhance and controlendothermic fuel reactions, to enhance cooling capacity for aircraft. In addition there was substantial basicmechanistic work, aimed at understanding processes responsible for catalytic ...

Sulphosalts in the system CuSbSrCuBiS2 (chalcostibite-emplectite) form a complete solid solution series. Seven compositions with the general formula Cu(SbxBi1_x)S2 have been synthesized using dry methods at 310°C. All members of the series are orthorhombic (space group Pnma) and show smoothly increasing a and b cell parameters with substitution of Bi for Sb; the c cell parameter increases up to...

the objective of this work focuses on the use of a new natural lignocellulosic material based on palm stems for adsorbing of hexavalent chromium (cr(vi)) in water. the palm stems powder (psp) was characterized using different techniques. the influencing factors on the adsorption of cr(vi) ions was investigated such as ph. the results show that the increase of the temperature and the initial ads...

Lignin peroxidase (LiP) is an important enzyme for degrading aromatic hydrocarbons not only in nature but also in industry. In the presence of H₂O₂, this enzyme can easily decompose lignin and analogue compounds under mild conditions. In this reaction mechanism, LiP catalyzes the C-C cleavage of a propenyl side chain, being able to produce veratraldehyde (VAD) from 1-(3',4'-dimethoxyphenyl) pro...

Many attempts have been made to improve heat transfer for thermally integrated microchannel reforming reactors. However, the mechanisms effects of design factors on characteristics are still not fully understood. This study relates a thermochemical process producing hydrogen by catalytic endothermic reaction methanol with steam in reactor. Computational fluid dynamics simulations conducted bett...

The thermal reaction of SF 6 with tungsten powder was investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC), combined the characterization solid decomposition products SEM, EDS, XPS Raman. Based on above experiments, a two-stage process proposed: first stage is surface vulcanization W+SF →S 2 , mainly taken place at 600 °C, activation energy valued 152.8 kJ·mol -1 ac...