Etymology and history Eduard Buchner By the late 17th and early 18th centuries, the digestion of meat by stomach secretions  and the conversion of starch to sugars by plant extracts and saliva were known but the mechanisms by which these occurred had not been identified. He wrote that "alcoholic fermentation is an act correlated with the life and organization of the yeast cells, not with the death or putrefaction of the cells. In a series of experiments at the University of Berlinhe found that sugar was fermented by yeast extracts even when there were no living yeast cells in the mixture.
The effects of contact time, adsorption temperature and initial XO concentration were discussed. On the basis of the Langmuir analysis, the maximum adsorption capacities were determined to be The negative values of free energy change indicated the spontaneous nature of adsorption.
Alizarin Red AR has been shown to be effectively removed from aqueous solution using the ultrafine fly ash UFA prepared by ball milling from raw fly ash FAa low-cost industrial solid waste. The maximum removal rate was Effects of important parameters, contact time, adsorbate concentration, pH and temperature, were investigated.
The AR uptake process followed the pseudo-second-order rate equation well, but the pseudo-first-order rate equation and intra-particle diffusion equation could only be applied to describe the initial stage of adsorption, furthermore, intra-particle diffusion might be the rate-controlling step of fast adsorption process.
The sorption decreased with increasing temperature and the adsorption apparent activation energy was 8. Langmuir isotherm equation could better describe the adsorption equilibrium at different temperatures, compared with Freundlich model.
The new purifying agent named granulated fly ash was used to absorb the organic dyes-ethylene blue, direct red 12B and reactive brilliant orange X-GN in solution in this paper. The effects of dosage, temperature and pH on adsorption and discolor were separately studied.
In addition, the adsorption model was also analyzed. Experiment results showed that adsorption isotherm models of ethylene blue and direct red 12B on the new agent conformed to Freundlich equation, and reactive brilliant orange X-GN conformed to Langmuir equation; The adsorption kinetics models of ethylene blue, direct red 12B and reactive brilliant orange X-GN on the new agent conformed to pseudo-secondary kinetic equation, liquid film diffusion was the main control step for adsorption of the three dyes.
With anaerobic granular sludge as adsorbent, the adsorption kinetics and thermodynamics of methylene blue MB from aqueous solution was studied by batch adsorption technique.
The pseudo-first order, pseudo- second order models and Langmuir, Freundlich isotherms models were used to describe the kinetic data. The experimental results show that the anaerobic granular sludge had strong and fast speed adsorption capacity for MB adsorption in wastewater.
The adsorption equilibrium could be reached in 2h, and the maximum adsorption rate was The equilibrium data were fitted to Langmuir isotherms and the equilibrium adsorption was well described by the Langmuir isotherm model.
The calculation values of thermodynamic parameters present that the adsorption is spontaneous and endothermic in nature. Our results suggest the anaerobic granular sludge is a potential MB cleaner in wastewater.
A continuous dynamic adsorption in a fixed-bed column was studied by canna edulis ker residue CEKR as an adsorbent for the removal of Cr VI ions from aqueous solution.
The dynamic adsorption process was simulated by some mathematic models, to determine the characteristic parameters of the column.
Breakthrough time reaching saturation increased significantly with the increase of the temperature, while the bed depth increased and the pH value decreased. In comparison, the initial metal concentration is able to slightly affect the adsorption. Some mathematical models could calculate the rate constants, correlation coefficients, the equilibrium adsorption and kinetic parameters, however, they were not suitable for the description the dynamic adsorption of Cr VI ions in the fixed-bed column.Investigation of the Enzymatic Effetcs of Materials on Hydrogen Peroxide Solution.
Tittle: Investigation of the Enzymatic Effects of Materials on Hydrogen Peroxide Solution Objective: To investigates the enzymatic effect of various materials in the hydrogen peroxide solution. "The effects of time and temperature in hydrothermal pretreatment on the enzymatic efficiency of wheat straw," BioRes.
13(3), Abstract An attempt to correlate biomass characteristics to its susceptibility to enzymes is often inconclusive via investigation of . The aim of the investigation was to learn more about the effects of heat and enzyme treatments on the dissolution and hydrolysis of starch granules, and, as an example, the gelatinization behavior of oat and barley starches in dilute water dispersion was examined.
Objective: To investigates the enzymatic effect of various materials in the hydrogen peroxide solution. Potato cubes Bubbles are timberdesignmag.com: Investigation of the Enzymatic Effects of Materials on Hydrogen Peroxide Solution.5/5(3).
LABORATORY INVESTIGATION The Breakdown of Hydrogen Peroxide by Catalase The characteristics of life are the result of chemical reactions occurring within the cell. The effects of molecular weight, X LLA, and average l - and d-lactyl unit sequence length (l L and l D, respectively) on the enzymatic hydrolysis of the films were investigated in the presence of proteinase K.