Background: Food borne pathogens are of the main concerns of food producers and consumers and Escherichia coli and Staphylococcus aureus create a lot of problems worldwide. The aim of this study was to evaluate antibacterial effects of monolaurin, sorbic acid and potassium sorbate on S. aureus and E. coli at different pH values and NaCl concentrations. Methods: Micro-well dilution assay was us...

The sorption of vapors by cellulose samples and by some cellulose derivatives was studied at 25 o C. To describe sorption isotherms, a thermodynamic equation was proposed: A=Ao/[1-(RT/g)lnφ], where Ao is maximal sorption value, φ is relative pressure of vapors, and g is specific thermodynamic potential. Depending on the g-value, this equation can describe isotherms of various shapes that occur ...

background: chemical preservation has become an increasingly important practice in modern food technology and herbal medicinal products with the increase in production of processed and convenience products. objective: in the present study, a reversed-phased hplc method for simultaneous determination of the preservatives sodium benzoate (sb) and potassium sorbate (ps) is described. methods: the ...

Chemoenzymatic assay systems are widely used to detect toxicants in various samples, including food and environment specimens. These methods based on the ability of types toxicant specifically inhibit/activate functions individual enzymes or enzyme systems. The present study examines possibility using proteolytic trypsin as a specific marker protease inhibitors different samples. shows that act...

abstract food preservatives are often added to food as preservation method. mostly one preservative alone cannot preserve a product effectively. so it is required to create a preservation system to overcome limitations derived from each preservative. using proper selection of different preservatives may lead to significant practical benefits. in this investigation, resistant strain of bacillus ...

Theoretical investigations of CO2 sorption are performed in four members of the highly tunable rht-metal-organic framework (MOF) platform. rht-MOFs contain two Cu(2+) ions that comprise the metal paddlewheels and both are in chemically distinct environments. Indeed, one type of Cu(2+) ion faces toward the center of the linker whereas the other type faces away from the center of the linker. Elec...

17β-estradiol and testosterone are naturally occurring steroids that co-occur in poultry litter. The effects of litter on sorption of these hormones to soil are not known. Sorption isotherms were developed for C-labeled testosterone and H-labeled estradiol in a Cecil sandy clay loam with and without poultry litter addition. The effect of applying the hormones alone (single-sorbate) or together ...

Background and Aim: Yeasts are common contaminants in the cheese industry, which frequently arise from raw milk, surrounding environment, equipment, resulting economic losses addition to health hazards. This study aimed compare antifungal effect of chitosan nano-chitosan as natural preservatives with a commonly used chemical preservative (potassium sorbate) against Rhodotorula mucilaginosa Cand...

Equilibrium condition is attained when the concentration of the solute remains constant, as a result of zero net transfer of solute sorbed and desorbed from sorbent surface. The equili‐ brium sorption isotherms describe these relationships between the equilibrium concentra‐ tion of the sorbate in the solid and liquid phase at constant temperature. Experimental data may provide different isother...

Doogh is a traditional Iranian drink prepared by fragmentation and dilution of yogurt, with addition of salt and flavouring. Dairy products are favorable environment for microbial growth due to high nutrient and relative humidity. One of the most important parameters in the food industry production and consumption is enhancing the shelf life of the product. Therefore, food additives such as pot...