Structural and physico-chemical properties of insoluble rice bran fiber: effect of acid–base induced modifications

Abstract The results of the study of acid-base indicators of peat in the Altai mountainous region are presented. The natural factors that in the aggregate determine the peculiarities of the physico-chemical properties of mountain peat of different agro-climatic zones of the Altai Mountains have been revealed. The variation in the acid values, total absorbed bases, adsorption capacity and the degree of saturation of raised-bog, transitional, fen peat, the number of exchangeable ions Ca2+ and Mg2+ has been estimated. The interrelation among these indicators has been presented. For the first time, regression equations of the relationship between exchangeable acidity pHKC1 and the degree of peat base saturation V, between total absorbed bases S and the degree of peat base saturation V have been obtained using nonlinear regression analysis. The adequacy and stability of the developed models have been verified. The calculated mean errors of approximation of regression models characterise the high accuracy of the forecast and are indicative of a good selection of models for the initial data.

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Investigation of the effect of cucurbit[7]uril complexation on the photophysical and acid–base properties of the antimalarial drug quinine

Physical Chemistry Chemical Physics ◽

10.1039/c6cp04931a ◽

2016 ◽

Vol 18 (44) ◽

pp. 30520-30529 ◽

Cited By ~ 14

Author(s):

Suman Mallick ◽

Kaushik Pal ◽

Falguni Chandra ◽

Apurba L. Koner

Keyword(s):

Antimalarial Drug ◽

Chemical Properties ◽

Acid Base ◽

Physico Chemical ◽

Base Properties

Tuning the physico-chemical properties of an anti-malarial drug upon cucurbit[7]uril encapsulation.

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Effects of rice bran on sensory and physico-chemical properties of emulsified pork meatballs

Meat Science ◽

10.1016/j.meatsci.2005.02.009 ◽

2005 ◽

Vol 70 (4) ◽

pp. 613-619 ◽

Cited By ~ 80

Author(s):

S.C. Huang ◽

C.Y. Shiau ◽

T.E. Liu ◽

C.L. Chu ◽

D.F. Hwang

Keyword(s):

Rice Bran ◽

Chemical Properties ◽

Physico Chemical

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Physico-chemical properties of N-(2-Hydroxybenzoyl)-N'-(p-Tosil) Hydrazine

Вестник Пермского университета Серия «Химия» = Bulletin of Perm University CHEMISTRY ◽

10.17072/2223-1838-2021-1-71-81 ◽

2021 ◽

Vol 11 (1) ◽

pp. 71-81

Author(s):

Yulia B. Elchishcheva ◽

◽

Ksenia S. Gorbunova ◽

Petr T. Pavlov ◽

◽

...

Keyword(s):

Dissociation Constants ◽

Hydrolytic Stability ◽

Chemical Properties ◽

Alkaline Media ◽

Acid Dissociation ◽

Degree Of Hydrolysis ◽

Acid Base ◽

Acid Dissociation Constants ◽

Physico Chemical ◽

Over Time

The results of a study of the physicochemical properties of N- (2-hydroxybenzoyl) -N '- (p-tosyl) hydrazine (GBSH) are presented. The solubility of the reagent in ethanol, 0.1 mol / L KOH solution, toluene, chloroform, hexane was studied by spectrophotometry, refractometry, and gravimetry. Based on the results obtained, it was shown that GBSG can be used in the processes of flotation and extraction. Acid-base equilibria in reagent solutions were studied spectrophotometrically. The obtained values of the acid dissociation constants (pKa1 = 7.93 ± 0.34; pKa2 = 10.48 ± 0.15) prove that GBSH is a weak diacid. The hydrolytic stability of the reagent was studied by the spectrophotometric method. The results of the study showed that HBHS solutions are sufficiently stable over time in alkaline media: the degree of hydrolysis within two hours is 2.35%. The surface activity of the reagent was determined by the stalagmometric method. It has been established that GBSG is a surfactant.

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