Arrhenius Equation Modeling for the Oxidative Stability Evaluation of Echium Oil Enriched with a Natural Preservative

Purpose This paper aims to explore the possibility of utilization of Asparagus racemosus as a novel natural preservative in meat products. Design/methodology/approach Chevon sausages were used as a study model and prepared by incorporating different levels of A. racemosus, namely, T1 (0.25 per cent), T2 (0.50 per cent) and T3 (0.75 per cent) and were vacuum packaged and assessed for various lipid oxidative stability and storage quality parameters under refrigerated (4 ± 1°C) conditions. Findings Significantly (p < 0.05) lower thiobarbituric acid reacting substances (mg malonaldehyde/kg) values were observed for the products containing A. racemosus in comparison to control indicating a significant effect on the lipid oxidative stability. The products containing A. racemosus also showed significantly (p < 0.05) lower values for various microbiological characteristics like total plate count (log cfu/g), psychrophilic count (log cfu/g), yeast and mould count (log cfu/g), anaerobic count (log cfu/g) and free fatty acid (% oleic acid) values indicating the antimicrobial and antifungal properties of A. racemosus. No significant (p > 0.05) effect was observed on the cooking yield and moisture content of the products. Significantly (p < 0.05) higher scores were observed for various sensory parameters of the products containing A. racemosus during the entire period of storage. Originality/value A. racemosus successfully improved the lipid oxidative stability and storage quality of the model meat product without compromising the sensorial characteristics and has a great potential as a novel natural preservative in muscle foods.

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Plum ( Prunus domestica L.) leaves extract as a natural antioxidant: Extraction process optimization and sunflower oil oxidative stability evaluation

Journal of Food Processing and Preservation ◽

10.1111/jfpp.14813 ◽

2020 ◽

Vol 44 (10) ◽

Author(s):

Nesren Elsayed ◽

Karima Said Mohamed Hammad ◽

Ekram Abd El‐Salam Abd El‐Salam

Keyword(s):

Oxidative Stability ◽

Process Optimization ◽

Sunflower Oil ◽

Extraction Process ◽

Natural Antioxidant ◽

Stability Evaluation ◽

Prunus Domestica

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Colistimethate Acidic Hydrolysis Revisited: Arrhenius Equation Modeling Using UPLC-QToF MS

Molecules ◽

10.3390/molecules26020447 ◽

2021 ◽

Vol 26 (2) ◽

pp. 447

Author(s):

Ioanna Dagla ◽

Anthony Tsarbopoulos ◽

Evagelos Gikas

Keyword(s):

Arrhenius Equation ◽

Biological Fluids ◽

Optimal Dose ◽

Ultra Performance Liquid Chromatography ◽

Multidrug Resistant ◽

Equation Modeling ◽

Analytical Methodology ◽

Indirect Determination ◽

Complete Hydrolysis ◽

C 50

Colistimethate (CMS), the prodrug of polymyxin E (colistin), is an antibiotic widely used as a last-line therapy against multidrug resistant Gram-negative bacteria, but little is known about its pharmacokinetics as its administration has stopped as a result of high neuro- and nephro-toxicity. The measurement of CMS levels in patients’ biological fluids is of great importance in order to find the optimal dose regimen reducing the drug toxicity. Until now, CMS assay methods are based on the indirect determination after its hydrolysis to colistin (CS). Herein, the aim is to find the optimal conditions for the complete hydrolysis of CMS to CS. The reaction was studied at accelerated conditions: 40 °C, 50 °C, and 60 °C, and the results were evaluated by assessing the Arrhenius equation and computation employing the Tenua software. A validated analytical methodology based on ultra-performance liquid chromatography (UPLC) coupled to a hybrid quadrupole time of flight (QToF) instrument is developed for the simultaneous measurement of CMS and CS. The current methodology resulted in complete hydrolysis, in contrast with the previously reported one.

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Contribution to modeling the viscosity Arrhenius-type equation for saturated pure fluids

International Journal of Modern Physics B ◽

10.1142/s0217979216502027 ◽

2016 ◽

Vol 30 (27) ◽

pp. 1650202 ◽

Cited By ~ 3

Author(s):

Jianxiang Tian ◽

Laibin Zhang

Keyword(s):

Arrhenius Equation ◽

Type Equation ◽

Fluid Phase ◽

Equation Modeling ◽

Temperature Range ◽

Pure Fluids ◽

Fluid Phase Equilibria ◽

Two Parameters ◽

Parameter Values ◽

The Relationship

Recently, Haj-Kacem et al. proposed an equation modeling the relationship between the two parameters of viscosity Arrhenius-type equations [Fluid Phase Equilibria 383, 11 (2014)]. The authors found that the two parameters are dependent upon each other in an exponential function form. In this paper, we reconsidered their ideas and calculated the two parameter values for 49 saturated pure fluids by using the experimental data in the NIST WebBook. Our conclusion is different with the ones of Haj-Kacem et al. We found that (the linearity shown by) the Arrhenius equation stands strongly only in low temperature range and that the two parameters of the Arrhenius equation are independent upon each other in the whole temperature range from the triple point to the critical point.

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