نتایج جستجو برای: wvp
تعداد نتایج: 169 فیلتر نتایج به سال:
Routine liquid water path measurements and water vapor path are valuable for process studies of the cloudy marine boundary layer and for the assessment of large-scale models. The VOCALS Regional Experiment respected this goal by including a small, inexpensive, upwardpointing millimeter-wavelength passive radiometer on the fourteen research flights of the NCAR C-130 plane, the Gband (183 GHz) Va...
the effect of oleic and stearic acids on the water vapor permeability (wvp) and mechanical properties of sodium caseinate films was investigated. emulsifiers (span 80 and 85) were employed to produce the base mixture of film. tensile strength (ts), elongation (e) and young's modulus (ym) were obtained for both standard (without lipids) and hydrophobic films. results showed that the additio...
UNLABELLED Chitosan is a biopolymer obtained by N-deacetylation of chitin, produced from shellfish waste, which may be employed to elaborate edible films or coatings to enhance shelf life of food products. This study was conducted to evaluate the effect of different concentrations of nanofiller (cellulose nanofibers, CNF) and plasticizer (glycerol) on tensile properties (tensile strength-TS, el...
Polymer blends of cold water soluble starches (amylose or amylopectin soluble starch) with gelatin were prepared using solvent casting method. The solid state miscibility and polymer-polymer interactions between the constituent polymers were studied by fourier transforms infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorirmetry (DSC), light optical microscopy (OP...
BACKGROUND Microbial activity is a primary cause of deterioration in many foods and is often responsible for reduced quality and safety. Food-borne illnesses associated with E. coli O157:H7, S. aureus, S. enteritidis and L. monocytogenes are a major public health concern throughout the world. A number of methods have been employed to control or prevent the growth of these microorganisms in food...
the aim of this study was to investigate the barrier properties of cellulose nanocrystals-pvananocomposites. nanocomposite films with different filler loading levels (3, 6, 9 and 12% by wt) weredeveloped by solvent casting method. the effect of cellulose nanocrystals on the barrier properties ofthe nanocomposites was studied. to this end, moisture absorption, water vapor permeability (wvp),oxyg...
Nanofibers, produced through the novel method of electrospinning, have a high ratio surface area to volume, which allows them different optical, electrical, thermal, and mechanical properties than macroscale materials. In this study, it was aimed produce nanofibers with gelatin curcumin. The effects concentration crosslinking citric acid on characteristics electrospun were studied. Gelatin film...
Edible film dibuat dari pati sagu alami dan termodifikasi. Pati termodifikasi merupakan yang telah dipresipitasi (diendapkan) dengan pelarut etanol variasi waktu presipitasi (1, 2, 3, 4, 5 jam). Karakterisasi edible meliputi analisis gugus fungsi menggunakan FTIR, kadar air, kelarutan dalam sudut kontak, water vapor permeability (WVP), ketebalan, uji mekanik. Hasil menunjukkan bahwa proses modi...
Diante da crescente preocupação com os impactos ambientais relacionados ao uso de polímeros sintéticos, estudos visando à obtenção e aplicação materiais poliméricos fontes renováveis vêm aumentando, como por exemplo, o desenvolvimento filmes comestíveis base naturais. Com isso, este trabalho teve objetivo produzir comestível biodegradável meio uma matriz polissacarídeos (goma arábica, carboxime...
Pollution and destruction of the environment due to accumulation non-degradable plastics are some most important concerns in world. A significant amount this waste is related polymers used food packaging. Therefore, experts industry have been looking for suitable biodegradable alternatives synthetic polymers. Preparing biocompatible films based on starch a good choice. In study, various factors...
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