نتایج جستجو برای: wvp

تعداد نتایج: 169  

Journal: :Cellulose 2021

Sustainable food packaging films were developed using a combination of k-Carrageenan (k-C), hydroxyl ethyl cellulose (HEC), silicon dioxide (SiO2), and silver (Ag) nanoparticles. The CH-SiO2/Ag nanocomposites showed promising results, mainly due to their transparency, flexibility, low cost, environmental friendliness. structure uniform morphology the determined by FT-IR, XRD, SEM analysis. Barr...

Journal: :Food Hydrocolloids 2021

The aim of this work was to study the potential application edible films obtained by complex coacervation promoted electrostatic interactions between positively charged chitosan (CH) 3% (w/w) and negatively whey protein isolate (WPI) (w/w). Preliminary assays turbidimetry were made in order find optimal CH-to-WPI mass ratio for coacervation. maximum turbidity CH:WPI 0.1:1 dispersions CH/WPI (bo...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
y. zahedi n. sedaghat b. ghanbarzadeh

novel edible emulsified films were made using pistachio globulin protein (pgp) and palmitic fatty acid at concentrations of 2, 4, and 6 % w/w protein by tween-80 and homogenization technique. addition of palmitic acid to the pgp filmogenic solution resulted in great reduction of wvp in the emulsified films (37-40 %). concentration of palmitic acid did not create significant difference (p>0.05) ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی ساری - دانشکده کشاورزی و منابع طبیعی 1391

امروزه آسیب های زیست محیطی ناشی از بکار بردن پلیمر های سنتزی غیر قابل تجزیه در بسته بندی مواد غذایی و دارویی سبب روی آوردن محققین به سمت تولید پوشش های خوراکی و زیست تخریب پذیر با استفاده از بیوپلیمرها شده است. با این حال، استفاده از بیوپلیمر ها به علت ممانعت کنندگی ضعیف آنها در برابر نفوذپذیری به بخار آب محدود شده است. در این تحقیق اثر هریک از ترکیبات سوربیتول، گلیسرول، لاکتیک اسید، سیتریک اسی...

Journal: :journal of chemical health risks 0
mohammad mehdi marvizadeh food biopolymer research group, food science and technology department, damghan branch, islamic azad university, damghan, semnan, iran abdorreza mohammadi nafchi food biopolymer research group, food science and technology department, damghan branch, islamic azad university, damghan, semnan, iran maryam jokar food biopolymer research group, food science and technology department, damghan branch, islamic azad university, damghan, semnan, iran

the effects of zinc oxide nanorod (zno-n) incorporation on thephysicochemical properties of tapioca starch / bovin gelatin composite film such as water absorption capacity (wаc), water solubility and permeability to water vapour (wvp) were investigated. in this search, zno-n was homogenized by sonication and added into tapioca starch / bovine gelаtin dispersions аt different concentrations (e.g...

Journal: :journal of chemical health risks 0
r. nassiri biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semanan, iran a. mohammadinafchi biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semanan, iran

the effects of nano titanium dioxide incorporation were investigated on the water vapor permeability, oxygen permeability, and antimicrobial properties of bovine gelatin films. the nano tio2 (tio2- n) was homogenized by sonication and incorporated into bovine gelatin solutions at different concentrations (e.g. 1, 2, 3, and 5% w/w of dried gelatin). the permeability of the films to water vapor a...

Journal: :journal of chemical health risks 0
m. rojhan biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semnan, iran l. nouri biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semnan, iran

starch is found in abundance in nature and it is one of the raw materials used for food packaging because of the low price, biodegradability, good mechanical and barrier properties. the recycling ability of coating materials was significantly increased by using edible films and coating in comparison to traditional packaging and it could be an alternative for synthetic films. in this research, t...

       Food packaging extensively uses plastic films and containers of petroleum-based polymers for their excellent functional properties and competitive price. Plastic packaging has become a central focus of waste reduction efforts, particularly in aesthetic terms of damage to flora and fauna. Presently, consumers require greater quality and longer shelf lives for their foodstuffs, while they ...

Journal: :Food chemistry 2014
Mia Kurek Alain Guinault Andrée Voilley Kata Galić Frédéric Debeaufort

The influence of water vapour conditions on mass transport and barrier properties of chitosan based films and coatings were studied in relation to surface and structural properties. Water contact angles, material swelling, polymer degradation temperature, barrier properties (PO2, PCO2, WVP) and aroma diffusion coefficients were determined. The solvent nature and the presence of carvacrol influe...

Journal: :Molecules 2012
Xingfeng Guo Yanan Lu Heping Cui Xiangxing Jia Hongchao Bai Yuxiang Ma

The effects of zein ratio, concentration of glycerol, liquid-solid ratio, ethanol concentration, pH and heat-treatment temperature on the properties of zein/wheat gluten composite films were researched. The results showed that elongation (E) increased with an increase in glycerol or ethanol concentrations, but it first increased and then decreased with increasing zein/wheat gluten ratio, heat-t...

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