On the Reverse Stability Kinetics of Meat Pigment Oxidation in Aqueous Extract from Fresh Beef

The mechanical alloys-composite MАs (Mg +10 % wt.Ti + 5 % wt.Y and Mg +10 % wt.Ni + 5 % wt.Y) were synthesized. The phase content, microstructure, the thermal stability, kinetics of hydrogen desorption from the MgH2 hydride phase of the obtained MAs were studiedby using XRD, SEM, TDS methods. It has been established that the addition of Ti + Y and Ni + Y to magnesium leads to significant improvement in the kinetics of hydrogen desorption from the MgH2 hydride phase, which is evidenced by a significant reduction (in 6 and 15 times)in the time of release of all hydrogen from MA1 and MA2, respectively. Due to, Ti, Ni,Y alloying, the decrease in the thermodynamic stability of MgH2 is not found.

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THE EFFECT OF PSEUDOCEDRELA KOTSCHYI (SCHWEINF.) HARMS EXTRACTS AGAINST STAPHYLOCOCCUS AUREUS GROWTH

Bacterial Empire ◽

10.36547/be.2021.4.1.11-15 ◽

2021 ◽

Vol 4 (1) ◽

pp. 11-15

Author(s):

Kokou Atchou ◽

Koku Amegbo Dakey ◽

Farida Etroubeka-Tsono ◽

Amégninou Agban ◽

Simplice Damintoti Karou ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Antibacterial Activity ◽

Aqueous Extract ◽

Ethanolic Extract ◽

Clinical Strain ◽

Aqueous Extracts ◽

Phytochemical Screening ◽

Bactericidal Effects ◽

Kinetics Of ◽

Kinetics Of Inhibition

Staphylococcus aureus is a ubiquitous bacteria that causes a serious health problem because of its multi-resistance to antibiotics. The aimed of this study was to evaluate the antibacterial activity of P. kotschyi root against S. aureus ATCC 29213 and S. aureus, a clinical strain. The phytochemical compound was sought in the extracts by standard staining tests and extractions were carried out by fractionation using solvents depletion method with increasing polarity. The method of dilution in liquid medium was used for the antibacterial tests. The results showed that the aqueous extract of the bark was effective against both S. aureus with MICs of 0.39 mg.mL-1. The MICs of ethanolic extract were 0.39 and 0.78 mg.mL-1, respectively on S. aureus ATCC 29213 and S. aureus. The steles of P. kotschyi roots were less effective. The ethanolic and aqueous extracts at concentrations = 2MICs, have been respectively bacteriostatic and bactericidal effects on tested germs. The kinetics of inhibition showed that the aqueous extract of the bark at 0.78 mg.mL-1, completely destroyed the two germs respectively in 4 h and 5 h. The action of ethanolic extract at 0.78 and 1.56 mg.mL-1 occurs late against both S. aureus at 6 h and 7 h. Phytochemical screening revealed the presence of alkaloids, tannins, flavonoids, anthracenes, glycosides, saponosides and sterols, some of that may be responsible for the observed antimicrobial activity. This study proved the antibacterial activity of P. kotschyi roots that can be exploited as an antibiotic in the treatment of S. aureus infections.

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Stability kinetics of fusidic acid: Development and validation of stability indicating analytical method by employing Analytical Quality by Design approach in medicinal product(s)

Journal of Chromatography B ◽

10.1016/j.jchromb.2019.05.001 ◽

2019 ◽

Vol 1120 ◽

pp. 113-124 ◽

Cited By ~ 4

Author(s):

Gajanand Sharma ◽

Kanika Thakur ◽

Kaisar Raza ◽

O.P. Katare

Keyword(s):

Medicinal Product ◽

Fusidic Acid ◽

Analytical Method ◽

Quality By Design ◽

Analytical Quality ◽

Stability Indicating ◽

Quality By Design Approach ◽

Development And Validation ◽

Stability Kinetics ◽

Kinetics Of

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Development of carboxymethyl cellulose/ polyphenols gels for textile applications

Autex Research Journal ◽

10.2478/v10304-012-0021-9 ◽

2013 ◽

Vol 13 (2) ◽

pp. 33-36 ◽

Cited By ~ 5

Author(s):

Hana Krizova ◽

Jakub Wiener

Keyword(s):

Wound Healing ◽

High Temperature ◽

Aqueous Extract ◽

Release Rate ◽

Carboxymethyl Cellulose ◽

Body Fluids ◽

Isotonic Solution ◽

Textile Materials ◽

Solid Film ◽

Kinetics Of

Abstract The aim of this study was to determine release rate and changes in polyphenols’ content, which were sorbed to carboxymethyl cellulose gel and subsequently desorbed. An aqueous extract of blue marc vine variety Fratava was used as a source of polyphenols. The gel was dried into a solid film and polyphenols were then desorbed again by dissolving this film in saline (isotonic) solution. Further, the influence of different times of high temperature (180°C) of drying gel on change in the amount of released polyphenols and also kinetics of their release in re-transfer of the film on the gel and solution was studied. The process simulates the possible use of carboxymethyl cellulose/ polyphenols film sorbed on textile materials and its contact with the tissues and body fluids such as course of wound healing.

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The Schiff bases of pyridoxal-5-phosphate and hydrazides of certain pyrazoles: Stability, kinetics of formation, and synthesis

Russian Journal of General Chemistry ◽

10.1134/s1070363217060093 ◽

2017 ◽

Vol 87 (6) ◽

pp. 1161-1166 ◽

Cited By ~ 2

Author(s):

G. A. Gamov ◽

V. V. Aleksandriiskii ◽

M. N. Zavalishin ◽

A. Yu. Khokhlova ◽

V. A. Sharnin

Keyword(s):

Schiff Bases ◽

Kinetics Of Formation ◽

Stability Kinetics ◽

Kinetics Of

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Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide catalyzed by copper oxide

Water Science & Technology ◽

10.2166/wst.2019.254 ◽

2019 ◽

Vol 80 (1) ◽

pp. 126-133

Author(s):

Hamza Amaouche ◽

Salima Chergui ◽

Farid Halet ◽

Ahmed Réda Yeddou ◽

Abdelmalek Chergui ◽

...

Keyword(s):

Aqueous Solution ◽

Hydrogen Peroxide ◽

Copper Oxide ◽

Copper Oxide Nanoparticles ◽

Catalyst Stability ◽

Molar Ratio ◽

First Order ◽

Cyanide Removal ◽

Stability Kinetics ◽

Kinetics Of

Abstract This work is dedicated to the removal of free cyanide from aqueous solution through oxidation with hydrogen peroxide H2O2 catalyzed by copper oxide nanoparticles. Effects of initial molar ratio [H2O2]0/[CN−]0, catalyst dose, temperature, pH and the catalyst stability on cyanide removal have been investigated. The use of copper oxide has improved the reaction rate showing catalytic activity. The cyanide removal efficiency was increased from 60% to 94% by increasing in the dose of catalyst from 0.5 g/L to 5.0 g/L. Increasing the temperature from 20 °C to 35 °C promotes cyanide removal and the four successive times re-use of catalyst shows good stability. Kinetics of cyanide removal was found to be of pseudo-first-order with respect to cyanide. The rate constants have been determined.

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Antimicrobial and time-kill kinetics of the aqueous extract of Citrullus lanatus (Thunb.) seeds

Bio-Research ◽

10.4314/br.v18i1.5 ◽

2020 ◽

Vol 18 (1) ◽

pp. 1103-1110

Author(s):

UF Babaiwa ◽

SO Eraga ◽

JO Akerele

Keyword(s):

Antimicrobial Activity ◽

Aqueous Extract ◽

Citrullus Lanatus ◽

Antimicrobial Property ◽

Inhibition Zone ◽

Bacterial Strains ◽

Microbiological Methods ◽

Microbial Infections ◽

Time Kill ◽

Kinetics Of

This study evaluated the antimicrobial property of the aqueous extract of Citrullus lanatus (watermelon) seeds and its concentration-effect relationship (time-kill studies) on typed bacterial and fungal strains. Crude powdered seeds of Citrullus lanatus were extracted by maceration with water. Antimicrobial assay of the aqueous extracts was determined against Bacillus subtilis (NCTC 8236), Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 10145), Staphylococcus aureus (ATCC 25923), and Candida albicans (ATCC 24433) using standard microbiological methods. A total of 106 CFU/mL of each test strain was used as a baseline to carry out the time-kill studies. Extract concentration at minimum inhibitory concentration (MIC), 2MIC and 4MIC were used over a period of 24 hours. Aqueous extract had an intermediate antibacterial activity with inhibition zone diameters (IZD) of 15 - 18 mm and MIC range of 2.5 - 20 mg/mL. Time-kill studies showed a bacteriostatic, non-concentration dependent mode of antimicrobial activity with characteristic regrowth for all test strains. Citrullus lanatus seeds aqueous extract exhibited antimicrobial activity with a bacteriostatic, non-concentration dependent mode of action against test bacterial strains. Further studies aimed at isolating and purifying the antimicrobial principle in the aqueous extract of C. lanatus seed is warranted as this could serve as a potential new antibiotic for treating microbial infections.

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