Keratin particles generated from rapid hydrolysis of waste feathers with green DES/KOH: Efficient adsorption of fluoroquinolone antibiotic and its reuse

2021 ◽  
Vol 173 ◽  
pp. 211-218
Author(s):  
Shu-Ju Chao ◽  
Kuo-Hao Chung ◽  
Yi-Fen Lai ◽  
Yu-Kuei Lai ◽  
Shih-Hsien Chang
Keyword(s):  
Fluoroquinolone Antibiotic ◽  
Rapid Hydrolysis ◽  
Hydrolysis Of

scholarly journals Research on hydrogen generation from rapid hydrolysis of aluminum in sodium fluoride solution

2019 ◽  
Vol 118 ◽  
pp. 03048
Author(s):  
Changchun Li ◽  
Yuxin Wu
Keyword(s):  
Hydrogen Production ◽  
Kinetic Model ◽  
Sodium Fluoride ◽  
Hydrogen Generation ◽  
Hydrogen Yield ◽  
Shrinking Core Model ◽  
Fluoride Solution ◽  
Shrinking Core ◽  
Rapid Hydrolysis ◽  
Hydrolysis Of

Hydrogen generation from rapid hydrolysis of aluminum in sodium fluoride solution was investigated through a hydrolysis experiment. Rapid and instant hydrogen yield were observed using sodium fluoride as additive. The experimental results demonstrate that the increase of temperature and the amount of additives in a certain range will boost the hydrogen production. The amount of additives outside the range only has an effect on the rapid hydrolysis of the aluminum during the initial stage, but the total amount of hydrogen produced doesn’t increased significantly. Theoretical analysis of the effects of the mixing ratio and the temperature on the hydrogen production rates were performed using the shrinking core model and the kinetic model. The shrinking core model parameter a and k indicate the film change degree of porosity and thickness and the effect of time on the diffusion coefficient. the kinetic model is verified and the activation energy confirming hydrogen yield control by a molecular diffusion process. Correspondingly, mechanisms of Al corrosion in NaF solutions under low and high alkalinity were proposed, respectively.

Rapid hydrolysis of ginseng saponin by microwave oven reaction: Application to ginseng drink preparation

1994 ◽  
Vol 17 (5) ◽  
pp. 389-391
Author(s):  
Man Ki Park ◽  
Jeong Hill Park ◽  
Sool Yeon Cho ◽  
Seung Yong Lee ◽  
Byung Hoon Han
Keyword(s):  
Microwave Oven ◽  
Ginseng Saponin ◽  
Rapid Hydrolysis ◽  
Hydrolysis Of

scholarly journals The hydrolysis of geminal ethers: a kinetic appraisal of orthoesters and ketals

2016 ◽  
Vol 12 ◽  
pp. 1467-1475 ◽  
Author(s):  
Sonia L Repetto ◽  
James F Costello ◽  
Craig P Butts ◽  
Joseph K W Lam ◽  
Norman M Ratcliffe
Keyword(s):  
Water Contamination ◽  
Jet Fuel ◽  
Computational Studies ◽  
Water Interface ◽  
H Nmr ◽  
Novel Approach ◽  
Rapid Hydrolysis ◽  
First Time ◽  
Hydrolysis Of ◽  
Hydrolysis Reactions

A novel approach to protecting jet fuel against the effects of water contamination is predicated upon the coupling of the rapid hydrolysis reactions of lipophilic cyclic geminal ethers, with the concomitant production of a hydrophilic acyclic hydroxyester with de-icing properties (Fuel Dehydrating Icing Inhibitors - FDII). To this end, a kinetic appraisal of the hydrolysis reactions of representative geminal ethers was undertaken using a convenient surrogate for the fuel–water interface (D2O/CD3CN 1:4). We present here a library of acyclic and five/six-membered cyclic geminal ethers arranged according to their hydroxonium catalytic coefficients for hydrolysis, providing for the first time a framework for the development of FDII. A combination of 1H NMR, labelling and computational studies was used to assess the effects that may govern the observed relative rates of hydrolyses.

Autolysis of Penicillium oxalicum with special reference to its cell walls

1982 ◽  
Vol 28 (12) ◽  
pp. 1289-1295 ◽  
Author(s):  
M. I. Perez-Leblic ◽  
Fuensanta Reyes ◽  
R. Lahoz ◽  
S. A. Archer
Keyword(s):  
Cell Walls ◽  
Schizophyllum Commune ◽  
Dry Weight ◽  
Penicillium Oxalicum ◽  
Lytic Enzyme ◽  
Enzyme Complex ◽  
Fungal Cell ◽  
Rapid Hydrolysis ◽  
And Storage ◽  
Hydrolysis Of

Cultures of Penicillium oxalicum growing on a denned medium supplemented with yeast extract reached the onset of autolysis after 3 days at 25 °C. Thenceforth, autolysis was progressive and eventual reductions in dry weight of 96% were recorded by day 47. The pH of the medium fluctuated between 4.0 during the exponential phase of growth and 9.0 during autolysis. Electron microscopy of autolyzing cultures revealed a progressive loss of cytoplasmic ultrastructure. Digestion of the cell walls, with a rapid hydrolysis of the three external layers and a low hydrolysis of the two inner layers, was accompanied by deep pitting and by loss of the distinct five-layered structure. A lytic enzyme complex was obtained from the filtrates of extensively autolyzed cultures. It was rich in (1 → 3)-β-glucanase and other enzymes active against a range of fungal cell wall and storage polysaccharides. This enzyme complex degraded extensively isolated cell walls of P. oxalicum and three other Ascomycetes but had less effect on walls isolated from Mucor mucedo or Schizophyllum commune. In the case of P. oxalicum, cell walls harvested from young cultures were more readily digested than were the walls from older cultures.

THE PROTEOLYTIC ENZYMES OF MICROORGANISMS: III. SOME CHARACTERISTICS OF EXTRACELLULAR PROTEASES PRODUCED IN SUBMERGED CULTURE

1950 ◽  
Vol 28c (6) ◽  
pp. 600-612 ◽  
Author(s):  
W. B. McConnell
Keyword(s):  
Low Temperatures ◽  
Free Amino ◽  
Submerged Culture ◽  
Culture Medium ◽  
Proteolytic Enzymes ◽  
Amino Groups ◽  
Extracellular Proteases ◽  
Egg Albumin ◽  
Rapid Hydrolysis ◽  
Hydrolysis Of

Some of the general characteristics of the proteases liberated into the culture medium by molds and actinomycetes grown in submerged culture have been studied. Species of Alternaria, Streptomyces, Mortierella, and Gliocladium were used. The enzymes resemble trypsin in that they are most active at a pH slightly above 7 and are inhibited by a preparation of egg albumin. They are stable at low temperatures but suffer marked losses in activity when stored for 16 hr. above 40 °C. The most rapid hydrolysis of gelatin occurs at temperatures between 40 °C. and 50 °C. The enzymes from different organisms show definite differences with respect to their ability to attack different proteins, gelatin and casein being in general the most readily digested. The protease systems from different organisms also vary with respect to the extent to which they can digest gelatin; some enzymes are able to release about three times as many amino groups from gelatin as others. The limit of the hydrolysis is not dependent upon substrate concentration but is slightly affected by the concentration of enzyme. The enzymes were effective in liberating free amino acids from gelatin.

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