نتایج جستجو برای: oxygen permeability

تعداد نتایج: 256260  

Journal: :تحقیقات مهندسی کشاورزی 0
محمد اکرامی دانشجوی کارشناسی ارشد گروه علوم و مهندسی صنایع غذایی پردیس کشاورزی و منابع طبیعی دانشگاه تهران زهرا امام جمعه استاد گروه علوم و مهندسی صنایع غذایی پردیس کشاورزی و منابع طبیعی دانشگاه تهران میلاد محمدی کیا دانشجوی کارشناسی ارشد گروه علوم و مهندسی صنایع غذایی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

new edible composite films formed from salep (orchis mascula) and 10%, 20%, and 30% (w/w) oleic acid were prepared by emulsification with the aim of improving the water vapor barrier and mechanical properties of the film. as oleic acid concentration increased up to 30% (w/w), oxygen permeability (27%), elongation at break (86%) and thickness (2%) of salep films increased significantly and the t...

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: :polyolefins journal 0
mohammadreza rahnama department of plastics engineering, iran polymer and petrochemical institute, p.o.box14975/112, tehran, i.r. iran abdulrasoul oromiehie department of plastics engineering, iran polymer and petrochemical institute, p.o.box14975/112, tehran, i.r. iran shervin ahmadi department of plastics engineering, iran polymer and petrochemical institute, p.o.box14975/112, tehran, i.r. iran ismaeil ghasemi department of plastics engineering, iran polymer and petrochemical institute, p.o.box14975/112, tehran, i.r. iran

in this research, high oxygen-barrier films were organized based on low-density polyethylene (ldpe)/ ethylene vinyl alcohol (evoh)/ polyethylene-grafted maleic anhydride (ldpe-g-ma) compatibilizer. the effects of 10–30 wt. % evoh and 0–10 wt. % ldpe-g-ma loadings on the properties of final films were evaluated. the morphology of specimens was observed by using scanning electron microscopy (sem)...

2005
GEORGE N. LAPENNAS KNUT SCHMIDT-NIELSEN

The permeability of the swimbladder to gas was measured as the conductance to oxygen in seven species of fish. The low over-all conductance resides in the low diffusion constant, K, of the middle layer of the wall (submucosa) while the outer and inner layers (tunica externa and mucosa) have diffusion constants similar to other vertebrate tissues. The low diffusion constant is due to a low diffu...

Beikzadeh, S, Farhoodi , M, kazemian-, F, Mirmoghtadaie *, L, sheikhi, Zh, shojaee-aliabadi, S,

Background and Objectives: Cold plasma is an eco-friendly and non-thermal technique, which has become an important technology to change the physical and chemical features of polymers. Recently, cold plasma has been considered in the decontamination and modification of packaging materials in the food industry. Therefore, the objective of this study was to survey the effect of using low-pressure ...

Journal: :journal of chemical health risks 0
h. safari maznabi msc student, food science and technology division, faculty of agriculture, damghan branch, islamic azad university, damghan, iran a. reza mohammadinafchi biopolymer research group, food science and technology division, faculty of agriculture, damghan branch, islamic azad university, damghan, iran

barrier properties are one of the most important factors in the edible film. in this study, edible mungbean films were prepared containing (0%, 15%, 30%, 45%) concentrations of rosemary aqueous extract. then the effect of rosemary was investigated on colorimetric and barrier properties (water vapor permeability, oxygen permeability). rosemary extract increased the absorption of color in the vis...

Journal: :Journal of atherosclerosis and thrombosis 2004
Bradley T Heppner Louis Wm Morgan

Plasma oxygen permeability measures how easily oxygen dissolves in and diffuses through blood plasma. There has long been evidence that artery wall hypoxia plays a role in atherogenesis. This paper reviews the influence that plasma oxygen permeability has on artery wall oxygenation and presents experimental evidence for a relationship between plasma oxygen permeability and clinically significan...

Journal: :پژوهش های حبوبات ایران 0
امین حسین زاده الناز میلانی امیرحسین الهامی راد محمدحسین حداد خداپرست

legumes are rich sources of protein and consider a good alternative to make a protein films. in this study, central composite design to investigate the simultaneously effect of the grasspea protein isolates (2 - 10 percent), glycerol (0.5 - 7%) and oleic acid (0 - 2%) on properties of edible films made from grasspea protein isolates, such as thickness, density, percentage of solubility in water...

Journal: :علوم و فنون بسته بندی 0
مریم عراقی زینب مصلحی عبدالرضا محمدی نافچی

nowadays use of edible films and coatings is increasing due to their biodegradability properties. fish gelatin obtained from fish skin wastage can be used as an appropriate protein compound for preparation of edible films and replacing pork gelatin. in this study, films were prepared from a combination of fish gelatin and three phenolic compounds (caffeic acid, tannic acid and ferulic acid) at ...

Journal: :Journal of Experimental Botany 2009
Lukasz Kotula Ernst Steudle

A new approach is described to analyse the barrier properties of the outer part of rice (Oryza sativa L.) roots towards oxygen. By using a root-sleeving O(2) electrode, radial oxygen loss at different distances from the root apex was measured and related to the corresponding root structure. In addition, internal oxygen concentrations were precisely adjusted using a newly developed perfusion tec...

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