Determination of EMC isotherms and appropriate mathematical models for canola

Zomorodian, Seyed Mohammad Ali; Kavoosi, Zahra; Momenzadeh, Leila

doi:10.1016/j.fbp.2010.10.006

Cited by 23 publications

(8 citation statements)

References 17 publications

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“…Similar behavior was observed with the BET model as the %E decreased from 20.10 to 13.94 on the modified model. This model is recommended for foods such as meat, dairy products and seeds (Ghayal et al, 2013;Zomorodian et al, 2011). The model showed a poor fit for biodegradable chitosan films with polyethylene glycol (Srinivasa et al, 2007).…”

Section: Modeling Of Experimental Datamentioning

confidence: 99%

“…These regions are not static and they change according to the material and the experimental conditions. The region corresponding to a w < 0.2 describes the adsorption of water in the monolayer region; the region corresponding to additional layers of water adsorption is allocated between a w 0.2-0.7; the region a w > 0.7, corresponds to the condensation of water in the pores of the material followed by a dissolution of the material (Ghayal et al, 2013;Zomorodian et al, 2011). At lower a w values, the slope of the curve of the adsorption isotherms of chitosan films was smaller and increased at a w values > 0.75.…”

Section: Moisture Adsorption Isothermsmentioning

confidence: 99%

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Modelling the effect of temperature on the water sorption isotherms of chitosan films

2016

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The interaction of the water molecules from the environment with foods and other materials can be evaluated using sorption isotherms. Films and biodegradable films are susceptible to changes in their functional characteristics due to adsorbed water. The amount of moisture that biodegradable films can adsorb depends on the temperature, relative humidity of the storage area and chemical composition. Several mathematical models can be used to describe the behavior of sorption isotherms in biodegradable films and some of them have been modified to include the temperature parameter into the equation. In this research, the original and modified BET, GAB, Halsey, Henderson and Dswin models were assessed to determine their suitability describing the behavior of moisture adsorption isotherms of chitosan films at 15, 20, 25 and 30 °C. The modified models of GAB, Dswin and Halsey gave the best fit to the experimental sorption data of the chitosan films, with R 2 values higher than 0.97 demonstrating that those models describe better the sorption isotherms at the temperatures studied.Keywords: chitosan film; moisture adsorption isotherm; GAB model. Practical Application:The knowledge of the relationship between the equilibrium moisture content, equilibrium relative humidity and temperature is very important in order to describe the effect of water activity on storage of foods. Several mathematical models were used to describe the water sorption behavior of chitosan edible films involving water activity, moisture content and temperature.

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Section: Modeling Of Experimental Datamentioning

confidence: 99%

Section: Moisture Adsorption Isothermsmentioning

confidence: 99%

Modelling the effect of temperature on the water sorption isotherms of chitosan films

2016

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“…TA B L E 2 Nine common EMC/ERH sorption isotherm models used for fitting the experimental data enable researchers to accurately predict EMC value of oat under a known storage conditions (ERH and temperature), which is good for safe storage (Zomorodian, Kavoosi, & Momenzadeh, 2011). It was worth noting that the goodness of fit of desorption models was always better than adsorption one due to the presence of adsorption hysteresis.…”

Section: Mathematical Modeling Of Emc/erh Isothermmentioning

confidence: 99%

Moisture migration analysis of Chinese naked oat during different storage conditions by sorption isotherm model and low‐field NMR

Cao

Zou

et al. 2020

Food Science & Nutrition

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Moisture migration is considered to be one of the most important influencer on crop quality during storage, which is easily affected by storage conditions, such as ambient humidity and temperature. The aim of this work was to determine the effect of storage condition on moisture content of Chinese naked oat by simulating 9 equilibrium relative humidity (ERH) and 5 temperatures. The equilibrium moisture content (EMC) of dry sample was achieved by adsorption, while EMC of wet one was achieved by desorption. EMC of oat increased with the increase in ERH and decreased when temperature increased. The sorption isotherm was a typical “S” shape and fitted using current EMC/ERH models. Modified Chung–Pfost (MCPE) model was the most suitable for describing the dynamic sorption process of Chinese naked oat during storage with a ERH range from 10% to 90%. There was an obvious hysteresis between adsorption and desorption isotherms, whose range decreased with the increase of temperature. High temperature accelerated moisture migration by increasing the hydrophilicity of oat surface. Moreover, dynamic moisture migration was imaged by low‐field nuclear magnetic resonance (NMR), showing that moisture migrated between ambient environment and oat mainly through endosperm where most moisture accumulated. During sorption, free water migrated firstly, followed by bound water and the change in content of bound water was more stable than that of free water. The results of this study can provide a useful information for future work on quality control of oat during storage.

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“…This plant is used as one of the healthiest edible oils due to its high content of unsaturated fatty acids and proteins. B. napus oil contains omega-3, essential vitamins, and minerals [ 30 ]. B. napus are used as an excellent species for the genetic and molecular studies of development and adaptation to stresses such as heavy metals stress due to its outstanding features, including rapid growth, high biomass, accumulation of heavy metals in the stem without showing any symptoms.…”

Section: Introductionmentioning

confidence: 99%

In Silico Analyses of Autophagy-Related Genes in Rapeseed (Brassica napus L.) under Different Abiotic Stresses and in Various Tissues

Eshkiki

Hajiahmadi

Abedi

et al. 2020

Plants

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The autophagy-related genes (ATGs) play important roles in plant growth and response to environmental stresses. Brassica napus (B. napus) is among the most important oilseed crops, but ATGs are largely unknown in this species. Therefore, a genome-wide analysis of the B. napus ATG gene family (BnATGs) was performed. One hundred and twenty-seven ATGs were determined due to the B. napus genome, which belongs to 20 main groups. Segmental duplication occurred more than the tandem duplication in BnATGs. Ka/Ks for the most duplicated pair genes were less than one, which indicated that the negative selection occurred to maintain their function during the evolution of B. napus plants. Based on the results, BnATGs are involved in various developmental processes and respond to biotic and abiotic stresses. One hundred and seven miRNA molecules are involved in the post-transcriptional regulation of 41 BnATGs. In general, 127 simple sequence repeat marker (SSR) loci were also detected in BnATGs. Based on the RNA-seq data, the highest expression in root and silique was related to BnVTI12e, while in shoot and seed, it was BnATG8p. The expression patterns of the most BnATGs were significantly up-regulated or down-regulated responding to dehydration, salinity, abscisic acid, and cold. This research provides information that can detect candidate genes for genetic manipulation in B. napus.

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Determination of EMC isotherms and appropriate mathematical models for canola

Cited by 23 publications

References 17 publications

Modelling the effect of temperature on the water sorption isotherms of chitosan films

Modelling the effect of temperature on the water sorption isotherms of chitosan films

Moisture migration analysis of Chinese naked oat during different storage conditions by sorption isotherm model and low‐field NMR

In Silico Analyses of Autophagy-Related Genes in Rapeseed (Brassica napus L.) under Different Abiotic Stresses and in Various Tissues

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