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Relevant bibliographies by topics / Hydrolysis Constant

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Journal articles

Academic literature on the topic 'Hydrolysis Constant'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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Journal articles on the topic "Hydrolysis Constant"

1

CAMACHO, FERNANDO, PEDRO GONZÁLEZ-TELLO, MARÍA-PURIFICACIÓN PÁEZ-DUEÑAS, EMILIA-MARÍA GUADIX, and ANTONIO GUADIX. "Correlation of base consumption with the degree of hydrolysis in enzymic protein hydrolysis." Journal of Dairy Research 68, no. 2 (2001): 251–65. http://dx.doi.org/10.1017/s0022029901004824.

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It is fairly easy to control the enzymic hydrolysis of proteins in alkaline conditions by measuring the base consumption required to keep the pH constant in the reactor. Unfortunately, however, base consumption is not related in any simple way to the degree of hydrolysis reached at any given moment and to establish this relationship it is essential to find out the mean pK of the α-amino groups released during the hydrolytic process. We have shown here that the correct mean pK value varies according to the pH of the working conditions and that the relationship between these values may depend up

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2

Shi, Qixun, Matthew P. Mower, Donna G. Blackmond, and Julius Rebek. "Water-soluble cavitands promote hydrolyses of long-chain diesters." Proceedings of the National Academy of Sciences 113, no. 33 (2016): 9199–203. http://dx.doi.org/10.1073/pnas.1610006113.

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Water-soluble, deep cavitands serve as chaperones of long-chain diesters for their selective hydrolysis in aqueous solution. The cavitands bind the diesters in rapidly exchanging, folded J-shape conformations that bury the hydrocarbon chain and expose each ester group in turn to the aqueous medium. The acid hydrolyses in the presence of the cavitand result in enhanced yields of monoacid monoester products. Product distributions indicate a two- to fourfold relative decrease in the hydrolysis rate constant of the second ester caused by the confined space in the cavitand. The rate constant for th

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3

Xu, Mengxue, Hongpeng Zhang, Haiyan Zhu, Lianyuan Wang, and Chaohua Zhou. "Soman hydrolysis catalysed by hypochlorite ions." E3S Web of Conferences 267 (2021): 02043. http://dx.doi.org/10.1051/e3sconf/202126702043.

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Sarin (GB) and soman (GD) are severely toxic nerve agents that react slowly in water, resulting in long-term poisoning of the water and a serious threat to personnel. Some ions can catalyse GB and GD hydrolysis in water; the relevant research for GB is detailed, whereas that for GD is relatively less so. In this paper, GD hydrolysis catalysed by hypochlorite (ClO−) ions was studied via kinetic experiments. A fluorite-ion-specific electrode was used to monitor F− ions produced, allowing the rate constant and half-life of the GD hydrolysis to be calculated. The results showed that ClO− ions prom

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4

Christ, O., P. A. Wilderer, R. Angerhöfer, and M. Faulstich. "Mathematical modeling of the hydrolysis of anaerobic processes." Water Science and Technology 41, no. 3 (2000): 61–65. http://dx.doi.org/10.2166/wst.2000.0056.

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In the recently published dynamic simulation model for mesophilic digestion of sewage sludge the hydrolysis constant refers to the total dry solid content without regarding their composition. To apply these models to the digestion of municipal solid waste, the hydrolysis constants of the various fractions must be considered. The major constituents of organic waste were identified as carbohydrates, proteins and lipids. For these three constituents the hydrolysis constants for thermophilic digestion were determined. The implementation of these constants into the existing dynamic models allowed a

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5

A. Efhema1, Anud M. "RATE CONSTANT OF SOME AMINO DERIVATIVES DISSOCIATION." iraq journal of market research and consumer protection 13, no. 1 (2021): 148–66. http://dx.doi.org/10.28936/jmracpc13.1.2021.(15).

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Amino glycoside derivation including, Neomycin, Streptomycin, Kanamycin and Gentamycin with special reagents, which are benzoylchloride; benzene sulfonyl chloride and phthalic anhydride were made to enhance Uv-detectability for HPLC analysis. But there are many problems facing pre column derivation and in order to solve this, the conductivity of antibiotic derivatives were used to calculate the dissociation constant and the hydrolysis rate which determined concern type reaction. In addition the characteristics those controlling the hydrolysis of antibiotic-derivatives were investigated.

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6

Kulakova, A. M., M. G. Khrenova, and A. V. Nemukhin. "Molecular mechanism of chromogenic substrate hydrolysis in the active site of human carboxylesterase-1." Biomeditsinskaya Khimiya 67, no. 3 (2021): 300–305. http://dx.doi.org/10.18097/pbmc20216703300.

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Human carboxylesterases are involved in the protective processes of detoxification during the hydrolytic metabolism of xenobiotics. Knowledge of the molecular mechanisms of substrates hydrolysis in the enzymes active site is necessary for the rational drug design. In this work, the molecular mechanism of the hydrolysis reaction of para-nitrophenyl acetate in the active site of human carboxylesterase was determined using modern methods of molecular modeling. According to the combined method of quantum mechanics/molecular mechanics calculations, the chemical reaction occurs within four elementar

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7

Milne, J. B. "Hexachlorotellurate(IV) hydrolysis equilibria in hydrochloric acid. Measurement by Raman and 125Te NMR spectroscopy and a reconsideration of earlier spectrophotometric results." Canadian Journal of Chemistry 69, no. 6 (1991): 987–92. http://dx.doi.org/10.1139/v91-144.

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Solutions of TeO2 (0.001 M) in HCl over a range of concentrations are shown to contain TeCl2(OH)2 in addition to TeCl62−and TeCl4(OH)−. The hydrolysis constants for TeCl62− and TeCl4(OH)− have been determined from a reconsideration of earlier UV-visible spectrophotometric results (1)[Formula: see text]The hydrolysis constants have also been determined by quantitative Raman spectroscopy (K1 = 2.21 (± 0.16) × 104 M3; K2 = 442 ± 57 M3). The agreement between K2 determined by the two methods is good but K1 from spectrophotometry is much larger than that from Raman studies. This disagreement is att

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8

Littlejohn, David, Abigail R. Wizansky, and S. G. Chang. "The dissociation constant and acid hydrolysis rate of hydroxysulfamic acid." Canadian Journal of Chemistry 67, no. 10 (1989): 1596–98. http://dx.doi.org/10.1139/v89-243.

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The acid dissociation constant and hydrolysis rate of hydroxysulfamic acid (HSA) in acid aqueous solutions have been studied. The acid dissociation constant was determined to be K = 1.5 ± 0.5 M at 298 K. The hydrolysis rate, R, was found to be R = k[H+][HSA], where k = 6.2 × 1012 exp (−26 300/RT) M−1 s−1 at (μ = 1.0 M and [HSA] is the concentration of all forms of hydroxysulfamic acid. Keywords: hydroxysulfamic acid, hydrolysis, acid dissociation.

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9

Collette, Timothy W. "Ester hydrolysis rate constant prediction from infrared interferograms." Environmental Science & Technology 24, no. 11 (1990): 1671–76. http://dx.doi.org/10.1021/es00081a007.

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10

Loerting, Thomas, and Klaus R. Liedl. "The Reaction Rate Constant of Chlorine Nitrate Hydrolysis." Chemistry 7, no. 8 (2001): 1662–69. http://dx.doi.org/10.1002/1521-3765(20010417)7:8<1662::aid-chem16620>3.0.co;2-p.

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