Antimicrobial film was extruded using LDPE resins and potassium sorbate powder; its tensile properties, transparency antimicrobial activity were measured to examine the adaptability as a packaging material. The properties not affected significantly by incorporation of 3% (w/w) in film. However, decreased concentration increased. growth rate maximum yeast, extended lag period before mold apparent. Therefore, it can prevent or reduce microbial spoilage low viscosity liquids on contacted...

Abstract Background Teachers can have a significant impact on student interest and learning in science, technology, engineering, math (STEM) subjects careers. Teacher self-efficacy also significantly affect learning. Researchers investigated the effects of teacher professional development integrated STEM curriculum self-efficacy. Participants study included high school science engineering technology teachers enrolled National Science Foundation–ITEST project called Advancing Integrated...

ABSTRACT: Monosaccharides have several hydroxyl groups and a compatible structure with starch polymers resulting in effective plasticization films. Two of plasticizers (polyols monosaccharides) were used to compare their plasticizing efficiency. Fructose, glucose, mannose, galactose, glycerol, sorbitol, ethylene glycol, maltitol selected at 13.031 mmol per 100 g pea starch. Edible films produced after heat gelatinization dehydration the 3% dispersion. The microstructure, attenuated total...

Summary Chemical analysis and antimicrobial nature of grape seed extracts (GSE) their Reisling Vitis vinifera L. application as fortificants for edible starch films were investigated. GSE possessed an antioxidant activity 17.18 ± 1.29 mmol TROLOX equivalents g extract −1 total phenolic content 327.58 7.24 gallic acid mainly attributed to flavonoid composition determined by high‐performance liquid chromatography accomplished a diode array detector electrospray ionisation mass spectrometer in...

ABSTRACT Edible starch films were produced from pea and various plasticizers (mannose, glucose, fructose, glycerol sorbitol) at the ratio of 4.34, 6.50, 8.69, 10.87 mmol plasticizer per gram starch. After film specimens conditioned 50% relative humidity, mechanical properties (tensile strength, elongation, modulus elasticity), water vapor permeability (WVP), moisture content, thermomechanical (G’ tan8) determined as a function concentration. At all concentration levels, monosaccharides...

Abstract: Edible coatings made of whey protein isolate (WPI), pea starch (PS), and their combinations with carnauba wax (CW) were prepared characterized. WPI combined CW formed stable emulsion while PS unstable both formulations produced non‐homogeneous films. Addition to WPI: combination at the ratio 1: 1, respectively, resulted in homogenous The PS: (1: 2) was a continuous film but had less droplets size distribution when compared 1 film. Combined films reduced tensile strength elongation...

Abstract Social, motivational, and instructional factors impact students’ outcomes in STEM learning their career paths. Based on prior research expectancy-value theory, the study further explored how multiple affect students context of integrated learning. High school teachers participated summer professional development taught to during following year, where scientific inquiry, biomimicry, 3D printing technology, engineering design were as strategies. Surveys conducted measure teacher...

ABSTRACT: Edible films produced from denatured pea protein concentrate (PPC) solution possessed the strength and elasticity to resist handling. Increasing concentration of plasticizer (glycerol) in film decreased tensile elastic modulus, increased elongation water vapor permeability (WVP). Very strong stretch‐able were obtained 70/30 60/40 PPC/glycerol composition, respectively. The low WVP value was maintained over a range glycerol 20% 40%, dry film. Film solubility not affected...

ABSTRACT: The tensile properties, water vapor permeability, oxygen permeability at different relative humidities (RH), and solubility of edible films made high‐amylose rice starch (RS) or pea (PS) were measured compared with the most commonly used films. Photomicrography shows amylopectin‐rich gels amylose‐rich granules. addition glycerol into granules swollen continuously dispersed between gels. Tensile strength RS PS decreased when RH increased from 51% to 90%, whereas elongation‐at‐break...

ABSTRACT: Hydrophobic beeswax emulsions were incorporated into hydrophilic starch films to modify physical, mechanical, and thermal properties of the films. Beeswax was added in film‐forming solution high‐amylose pea (35% 40% amylose w/w) at level 0%, 10%, 20%, 30%, w/w with glycerol as a plasticizer (40/60 glycerol/starch). Addition affected mechanical properties, significantly reducing tensile strength elongation increasing elastic modulus. addition decreased water vapor permeability...

ABSTRACT: Our objective was to understand the film-forming characteristics of amylose, amylopectin, and high-amylose (55%) starch solutions at ambient environment. By using an inverted phase-contrast microscope connected imaging system, we were able record analyze micro structural evolution throughout process film formation. The results image analysis suggested that coil-to-helix transition, followed by helices aggregation, dominated initial stage formation from solutions, although time when...

Water-related properties of whey-protein-coated pulp paper were measured. The measured wereinitial contact angle a water drop, dynamic change the with time, absorption rate, maximumwater absorptiveness, and vapor permeability (WVP). Whey protein isolate (WPI) solutions WPI:glycerol =6:4 spread on papers to produce final coating weights 5, 10, 18 g/m2 WPI paper. Initial contactangle was decreased by increasing weight, which indicated that increased homogeneity andsmoothness surface filling...

ABSTRACT: Whey‐protein‐isolate coating on paper produced a smooth surface, which was observed by scanning electron microscopy. Increasing weight decreased the breaking stress and Young's modulus. However, maximum strain not affected weight. Tearing strength changed WPI coating. The coated slightly darkened with small reduction of L value, but b values were significantly. made shiny increased gloss. Thus, exception about 12% in for 10 g/m 2 paper, did change mechanical optical properties...

The effect of fucoidan and its oversulfated derivative on starch digestibility was investigated by determining the enzymatic reaction kinetics their inhibitory activity against α-amylase amyloglucosidase. After hydrolysis, produced reducing sugars buckwheat (BW, 2.0–3.0 g/100 mL) those blends BW with low levels native (NF, 0.5–1.0 (OSF, were in range 440–450 mg/g starch. addition NF OSF did not significantly influence α-amylolysis. hydrolysis using both amyloglucosidase decreased to 12% 1.0...

Silver nanoparticles were biosynthesized with the aid of a novel and eco-friendly biological material Torreya nucifera. Temperature extract concentration found to influence size shape silver nanoparticles. Morphological images nanomaterials revealed that particles are in spherical ranging between 10 125 nm. Crystalline nature face centered cubic (fcc) structure was ensured by diffraction pattern peaks corresponding (1 1 1), (2 0 0), 2 0) (3 1) planes. Characterization performed X-ray Fourier...

A diffusion model was simulated by computer programming and diffusivities of potassium sorbate through various plastic films were determined a lag time method. The simulation showed that partition coefficient affected the flux total penetration but did not affect time. Therefore, method is appropriate in determining diffusivity, using any value for coefficient. 1.83 × 10−8 cm2/s, 4.26 10−13 4.65 5.47 cm2/s low density polyethylene (LDPE), high polyethylene, polypropylene, terephthalate,...