Tomato Seed Mucilage as a New Source of Biodegradable Film-Forming Material: Effect of Glycerol and Cellulose Nanofibers on the Characteristics of Resultant Films

2021 ◽  
Author(s):  
Nima Ghadiri Alamdari ◽  
Sorour Salmasi ◽  
Hadi Almasi
Keyword(s):  
Cellulose Nanofibers ◽  
Tomato Seed ◽  
Biodegradable Film ◽  
Film Forming ◽  
Seed Mucilage

scholarly journals FOOD BIODEGRADABLE FILM CONTAINING CHITOSAN

2018 ◽  
pp. 124-131
Author(s):  
Sergeyi Alekseyevich Skolkov ◽  
Marina Sergeevna Moiseenko ◽  
Natalya Aleksandrovna Kirichko ◽  
Marfuga Dyusembaevna Mukatova
Keyword(s):  
Food Industry ◽  
Acetic Acid Solution ◽  
Meat Products ◽  
Raw Material ◽  
Forming Process ◽  
Biodegradable Film ◽  
Bioactive Substances ◽  
Food Dye ◽  
Film Forming ◽  
Minced Meat

The purpose of the study was to establish the possibility of using chitosan with a molecular mass of 19 kDa to cover the surface of the food product with a bio-degradable film. Experimental samples of the biodegradable film had in their composition glycerol transglutaminase, food dye and chitosan substituting a portion of gelatin. Chitosan used in pilot samples is a derivative from chitin which was obtained by processing the shell-containing raw material (a waste from the cutting of cooked crayfish), according to the requirements of TU 9289-003-48203178-2001. In composition of chitosan sample the water content (%) was 9, minerals 0.2 and insolubles 0.3. Chitosan was used as 2% solution in 2% acetic acid solution. The prepared solution of the film-forming composition was spread on the prepared surface and cooled at ambient temperature with further drying followed by the film-forming process. The food biodegradable film produced using the mentioned above method of chitosan application was 0.09-0.10 mm thick. It has been stated that the use of transglutaminase in food biodegradable film production improves film quality characteristics necessary for packaging materials used in the food industry. When biodegradable films are used in the food industry, molded meat products (cutlets, meatballs, sausages) from minced meat of warm-blooded animals, fish, poultry and from combined fish minced meat are wetted with the prepared film-forming composition fixed with circulating air at 25-30°C during 10 minutes. The wetting process is repeated 3-4 times to form a food biodegradable film of the required thickness on the surface of the molded product. The film produced protects the product surface prolonging its storage life and can be eaten together with the product. The film has properties of bioactive substances due to the presence of chitosan and presents an alternative to modern hardly decomposable packing materials.

Thermoplastic starch as a component of film-forming compositions with degradable properties

2021 ◽  
Vol 43 (2) ◽  
pp. 73-78
Author(s):  
T.V. Dmitrieva ◽  
◽  
S.K. Krymovska ◽  
G.E. Glieva ◽  
S.V. Riabov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Extrusion Process ◽  
Polypropylene Glycol ◽  
Technological Parameters ◽  
Biodegradable Film ◽  
Film Forming ◽  
Wide Range ◽  
Crosslinking Agents

A review of the literature on the production of thermoplastic starch, which is an integral part of biodegradable polymer compositions. The analysis of plasticizing additives, influence of their functional groups, chemical structure and technological parameters on physical and mechanical properties of starch compositions is carried out. The list of plasticizing additives studied should include: glycerin, water, polyethylene glycol, polypropylene glycol. Sorbitol, formamide, xylitol, dimethyl sulfoxide, gelatin, maleic anhydride, epoxidized compounds are defined as structure-forming additives. To improve the physical and mechanical properties of the starch, the addition of crosslinking agents such as citric, boric, or ascorbic acid has been proposed. According to the above review of studies, it can be stated that when creating thermoplastic starch, it is mandatory to use both plasticizing components and structure-forming, which allows the processing of thermoplastic starch by extrusion with subsequent granulation. Thermoplasticized starch due to various plasticizing additives and technological parameters of its production acquires a wide range of characteristics, which solves the problem of creating biodegradable film-forming materials. Depending on the goals, the second component of such materials may be synthetic polymers: polyethers, polycaprolactone, polyolefins, polyterephthalates, PVA and others. Technological parameters of processing in the extrusion process range from 115 °C to 190 °C in the extrusion process, which does not establish an optimized technology for thermoplastic starch and requires further research.

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

A Freeze Shadow Technique for the Preparation of Soft Paint Latexes for Electron Microscopy

1977 ◽  
Vol 35 ◽  
pp. 314-315
Author(s):  
Earl R. Walter ◽  
Glen H. Bryant
Keyword(s):  
Sample Preparation ◽  
High Vacuum ◽  
Vacuum System ◽  
Latex Particles ◽  
New Methods ◽  
Diffusion Pump ◽  
Film Forming ◽  
Routine Basis ◽  
Distribution Studies ◽  
Preparation Techniques

With the development of soft, film forming latexes for use in paints and other coatings applications, it became desirable to develop new methods of sample preparation for latex particle size distribution studies with the electron microscope. Conventional latex sample preparation techniques were inadequate due to the pronounced tendency of these new soft latex particles to distort, flatten and fuse on the substrate when they dried. In order to avoid these complications and obtain electron micrographs of undistorted latex particles of soft resins, a freeze-dry, cold shadowing technique was developed. The method has now been used in our laboratory on a routine basis for several years.The cold shadowing is done in a specially constructed vacuum system, having a conventional mechanical fore pump and oil diffusion pump supplying vacuum. The system incorporates bellows type high vacuum valves to permit a prepump cycle and opening of the shadowing chamber without shutting down the oil diffusion pump. A baffeled sorption trap isolates the shadowing chamber from the pumps.

Efforts for The Practical Use of Cellulose Nanofibers

2018 ◽  
Vol 72 (1) ◽  
pp. 59-65
Author(s):  
Masayuki Kawasaki
Keyword(s):  
Cellulose Nanofibers

Modern devices for treatment of the surgeon’s hands and the surgical field (literature review)

2020 ◽  
pp. 41-50
Author(s):  
Artem Mikhailovich Morozov ◽  
◽  
Alexey Nikolaevich Sergeev ◽  
Gennady Alexandrovich Dubatolov ◽  
Nikolay Alexandrovich Sergeev ◽  
...  
Keyword(s):  
Cost Effective ◽  
Surgical Infection ◽  
Operating Field ◽  
Functional Additives ◽  
Literary Sources ◽  
Film Forming ◽  
Key Points ◽  
Surgical Field ◽  
Ammonium Compounds ◽  
Active Substances

The aim – analyze modern Russian and foreign literary sources in order to determine modern means for treating the hands of the surgeon and the operating field. Results. One of the key points in the prevention of surgical infection is the treatment of the surgeon’s hands and the operating field with effective skin antiseptics in order to destroy pathogenic and opportunistic microorganisms that colonize intact skin. In modern practice, skin antiseptics are predominantly used containing alcohols as active substances, in particular ethyl, propyl and isopropyl, halogenated substances such as iodine and iodophores, guanidines, which include chlorhexidine digluconate, as well as quaternary ammonium compounds. Moreover, the most widespread are combined preparations containing several active substances and functional additives, which makes it possible to neutralize the negative properties of various active substances. Also, an interesting and promising direction is the use of polymer operating films or film-forming antiseptics. Currently, research is being actively carried out aimed at finding and developing modern highly effective antiseptic agents and their rational combinations that meet the necessary requirements, are optimal in their properties, cost-effective and comfortable to use.

Effect of plant film-forming anti-transpirant on transpiration efficiency of winter wheat flag-leaf

2012 ◽  
Vol 19 (5) ◽  
pp. 1091-1095
Author(s):  
Chang-Hai SHI ◽  
Shao-Hua KONG ◽  
Hong-Mei ZHAI ◽  
Jing YANG ◽  
Dong-Xiao LI ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Flag Leaf ◽  
Transpiration Efficiency ◽  
Film Forming
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