نتایج جستجو برای: wvp
تعداد نتایج: 169 فیلتر نتایج به سال:
Many factors influence physical properties of edible composite films fabricated from hydrocolloids and lipids. Novel edible emulsified films were made using PGP, glycerol and stearic (SA) or oleic (OA) fatty acids by Tween-80 addition and emulsification of filmogenic solutions. In this study, the effect of physical state of fatty acids on the pistachio globulin protein (PGP) edible film prop...
La investigación se orienta a la obtención de películas biodegradables para mantener y conservar calidad los alimentos. Se utiliza almidón maíz, que por su característica hidrofílica requiere adición gelatina; y, aceite esencial cáscara mandarina (AE), naturaleza hidrofóbica.
 Para del AE, aplica el método Clavenger; Casting elaboración las películas, formuladas mediante un diseño experime...
Chitosan (CH) films were obtained by casting method and sandwiched between 2 layers of polycaprolactone (PCL), which formed compression molding, to form trilayers. CH also incorporated with grape seed extract (G) (15%, w/w) and/or nanocellulose (N) (1-5%, w/w). The tensile properties, transmittance, opacity, water vapor permeability (WVP), antimicrobial activity, release behavior trilayers dete...
Background: Environmental problems of the plastic materials used in food packaging and the demand for food quality improvements lead to the development of packaging in natural materials. Edible films such as calcium alginate extend the shelf life by acting as a selective barrier against moisture and oxygen. The main objective of this study was to explore a calcium alginate based edible film to ...
Some physical properties like Gas barrier, thermal stability, and mechanical properties and brittleness of pure biopolymers film are inadequate for food packaging. The functional properties of quince seed mucilage-based films were enhanced by addition of nanoclay (NC) (Cloisite 30B). Edible films were cast from heated aqueous solutions of quince seed (10% w/w) and NC (0.5%, 1%, 1.5%, and 2% w/w...
For developing and testing of power electronic converters and circuits, voltages and currents have to be measured to verify the proper mode of operation. In cascaded converters or multi-level topologies, the voltages to be measured contain common mode components up to several kV with transients up to several tens of kV/μs. Conventional isolated voltage measurement systems do either not meet the...
zein is one of the best biopolymer for edible film making and sugars are natural plasticizers for biopolymers. in this research, sugars (fructose, galactose and glucose) at three levels (0.5, 0.7, 1 g/g of zein) were used as plasticizers for zein protein films and their water vapor permeability (wvp), oxygen permeability (op) and atomic force microscopy (afm) topography were studied. the pure z...
To valorize abundant, unexploited, and low-cost agro-industrial by-products, olive pomace is proposed as a sustainable renewable raw material for cellulose microfibers (CMFs) production. In this study, CMFs were extracted from using alkaline bleaching treatments characterized in terms of morphological, structural, thermal properties. Afterward, the reinforcing capability was examined carboxymet...
فیلم خوراکی مرکب با استفاده صمغ قدومه شهری و گلیسرول (40،50،60و 70 درصد) تهیه شد. با افزایش غلظت گلیسرول، نفوذ پذیری به بخارآب ((wvp، درصد کشیدگی، رطوبت، حلالیت در آب و جذب رطوبت فیلم بیشتر گردید. در حالی که زاویه تماس به طور معنی داری کاهش یافت. افزودن گلیسرول در رنگ فیلم موثر بود به طوری که میزان سبزی و زردی فیلم بیشتر شد. بنابراین، برای بهبود خواص فیلم قدومه شهری از اسیدهای چرب استئاریک و پا...
Every year the world loses about 50% of fruits and vegetables post-harvest in supply chain. The use biodegradable coatings films with antioxidant properties has been considered an excellent alternative to extend shelf life food. Therefore, objective this work was develop a coating based on yam (Dioscorea rotundata L.) starch-containing lime, fennel, lavender essential oils strawberries (Fragari...
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