Activity and storage stability of immobilized glucose oxidase onto magnesium silicate

AbstractPackaging based on immobilization of antimicrobial enzymes provides a promising form of active packaging systems applicable in food processing. Glucose oxidase and lysozyme were immobilized by the Ugi reaction with cyclohexyl isocyanide and glutaraldehyde on polyamide and ionomer films partially hydrolysed by hydrochloric acid. The immobilization of the enzymes on the surface of films was confirmed by FT-IR spectroscopy and the films were characterized by the specific activity of the immobilized enzymes. The enzyme migration into model solutions and the effect of pH, temperature and storage time on the activity of immobilized enzyme were also evaluated. Immobilization of lysozyme onto polyamide and ionomer films resulted in the loss of enzyme activity. The polyamide and ionomer films with immobilized glucose oxidase inhibited the growth of bacteria Escherichia coli CNCTC 6859, Pseudomonas fluorescens CNCTC 5793, Lactobacillus helveticus CH-1, Listeria ivanovii CCM 5884 and Listeria innocua CCM 4030 on agar media.

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Screening of Formulation for 5% Hexaflumuron Suspension Concentrates

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.881-883.25 ◽

2014 ◽

Vol 881-883 ◽

pp. 25-28

Author(s):

Bao Hua Zhang

Keyword(s):

Xanthan Gum ◽

Storage Stability ◽

Magnesium Silicate ◽

Suspension Stability ◽

Ethylene Glycols ◽

Optimum Formulation ◽

And Storage

The formulation of 5% Hexaflumuron suspension concentrates (SC) was optimized. Results showed that the optimum formulation consists of 5% Hexaflumuron, MF-5 1%, DISPERSE 1005 5%, Aluminum magnesium silicate 1.9%, 0.1% Xanthan gum (concentration is 2%), and 5% ethylene glycols, and water make up 100%. The product has good suspension stability and storage stability.

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Studying of Physical and Chemical Properties of tomato Seed Oil and Storage Stability

Basrah Journal of Agricultural Sciences ◽

10.33762/bagrs.2016.120266 ◽

2016 ◽

Vol 29 (2) ◽

pp. 266-274

Author(s):

Bushra B. Jerd ◽

Ali A. Sahi

Keyword(s):

Seed Oil ◽

Storage Stability ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Tomato Seed ◽

Physical And Chemical ◽

And Storage ◽

And Chemical Properties ◽

Tomato Seed Oil

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Asphalt Incorporation with Ethylene Vinyl Acetate (EVA) Copolymer and Natural Rubber (NR) Thermoplastic Vulcanizates (TPVs): Effects of TPV Gel Content on Physical and Rheological Properties

Polymers ◽

10.3390/polym13091397 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1397

Author(s):

Nappaphan Kunanusont ◽

Boonchai Sangpetngam ◽

Anongnat Somwangthanaroj

Keyword(s):

Storage Stability ◽

Ethylene Vinyl Acetate ◽

Softening Temperature ◽

Plastic Waste ◽

Gel Content ◽

Modified Asphalt ◽

C Storage ◽

Thermoplastic Vulcanizates ◽

Polymer Modified Asphalt ◽

And Storage

Plastic waste has been incorporated with asphalt to improve the physical properties of asphalt and alleviate the increasing trend of plastic waste being introduced into the environment. However, plastic waste comes in different types such as thermoplastic or thermoset, which results in varied properties of polymer modified asphalt (PMA). In this work, four thermoplastic vulcanizates (TPVs) were prepared using different peroxide concentrations to produce four formulations of gel content (with varying extent of crosslinked part) in order to imitate the variation of plastic waste. All four TPVs were then mixed with asphalt at 5 wt% thus producing four formulations of PMA, which went through physical, rheological, and storage stability assessments. PMA with higher gel content possessed lower penetration and higher softening temperature, indicating physically harder appearance of PMA. Superpave parameters remained unchanged among different gel content PMA at temperatures of 64, 70, and 76 °C. PMA with any level of gel content had lower Brookfield viscosity than PMA without gel content at a temperature of 135 °C. Higher gel content resulted in shorter storage stability measured with greater different softening temperatures between top and bottom layers of PMA after 5 days of 163 °C storage. This study shows that asphalt with thermoset plastic waste is harder and easier to pave, thus making the non-recycling thermoset plastic waste more useful and friendly to the environment.

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Effect of extrusion on physical and chemical properties and storage stability of corn germ

Cereal Chemistry ◽

10.1002/cche.10464 ◽

2021 ◽

Author(s):

Zhigang Xiao ◽

Kexin Wang ◽

Fanshu Li ◽

Huiying Cao ◽

Qingsong Duan ◽

...

Keyword(s):

Storage Stability ◽

Chemical Properties ◽

Corn Germ ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

And Storage ◽

And Chemical Properties

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Folate in Red Rhapsody Strawberry—Content and Storage Stability.

Proceedings ◽

10.3390/foods_2020-07670 ◽

2020 ◽

Vol 70 (1) ◽

pp. 47

Author(s):

Julius Rami ◽

Caroline Dumler ◽

Nadine Weber ◽

Michael Rychlik ◽

Gabriele Netzel ◽

...

Keyword(s):

Storage Stability ◽

Active Form ◽

Food Composition ◽

Biologically Active ◽

Stable Isotope Dilution ◽

Isotope Dilution Assay ◽

C Storage ◽

Vitamin B9 ◽

Adults And Children ◽

And Storage

Folate (Vitamin B9) is critical for a range of biological functions in adults and children, including DNA, protein and neurotransmitter synthesis. It is also essential for the healthy development of the fetus in early pregnancy and for the prevention of neural tube defects, such as spina bifida. Strawberries are considered a tasty and healthy fruit consumed all over the world and may potentially be an important dietary source of natural folates. However, the relative importance of strawberry as a dietary source will depend on the total folate concentration, vitamer profile, storage stability and bioavailability to humans. Red Rhapsody, an important commercial strawberry cultivar in Australia, was screened for its folate content and storage stability by stable isotope dilution assay (SIDA). Total folate content ranged from 90–118 μg/100 g fresh weight (fw), which was well above the value in the Australian Food Composition Database (39 μg/100 g fw). 5-Methyltetrahydrofolate, the biologically active form in humans, was the principal vitamer present. Furthermore, folate remained relatively stable during refrigerated (4 °C) storage (loss of only 28% after 14 days of storage). This information is relevant for consumers since the inherent perishability of strawberry fruit makes refrigerated storage common practice in Australian households.

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