Currently, in the Agrarian Programs of the state, due attention is not paid to the goat breeding industry. Meanwhile, support for downy goat breeding predetermines good prospects for the growth of export opportunities in Kazakhstan and the development of the country's light industry. The article presents data on the current state of the goat population. It has been shown that goat down from Kazakh genotypes corresponds to the fineness of Kashmir goats, which means that it is of high value and has every reason to increase its production within the country.
The paper presents data on the development of cellulosic textile materials with increased antimicrobial properties using copper nanoparticles. Synthesis of copper nanoparticles was carried out by simple chemical reduction of an aqueous solution of copper using ascorbic acid as a reducing agent. The influence of the concentration of copper, a reducing agent, and a stabilizer on the synthesis of copper nanoparticles was studied.A composition based on polyvinyl alcohol and copper nanoparticles was developed to impart enhanced antimicrobial properties to cellulosic textile materials. The results of the studies showed that a significant growth of bacteria was observed in the control sample (untreated fabric), the amount of mesophilic aerobic and facultative anaerobic microorganisms (Staphylococcus aureus) decreased with increasing concentrations of copper nanoparticles, antibacterial properties increased. Modified by the proposed method cellulosic textile materials showed high resistance to the action of microorganisms and can be used for the production of sanitary and hygienic textile products.
The article is devoted to the study and assessment of the technological properties of down based on the technology of dyeing down from goat wool from various genotypes of goats of the republic. The dyeing was carried out under laboratory conditions with Italian dyes. The dependence of the color intensity for downy fibers is described by polynomial equations of the second and third degree. It has been shown that goat down fibers have good dyeing ability, dyeing uniformity and show good dyeing performance in standard modes.
The article discusses a method for producing silver nanoparticles (NPs) in aqueous solutions by reducing sodium borohydride in the presence of polyvinyl alcohol; selected optimal conditions for the synthesis. The resulting silver NPs have a spherical shape, with a diameter of from 30 to 130 nm. NPs are stable, do not precipitate and do not change color for 3–4 weeks. Electron microscopic images confirm the formation of a thin polymer film on the surface of cellulose fiber and show a change in the morphological surface of the treated samples compared to untreated ones. The energy dispersive microanalysis data showed that the raw cotton fabric contains C – 57.02%, O – 42.98%. After processing, nanoscale particles of silver are encapsulated on the surface of the fabric – 0.18–0.28%, which are distributed rather unevenly. Modification of cellulosic textile materials of silver NPs imparts a stable antimicrobial effect , as well as improves their physico-mechanical and hygienic properties. The air permeability indicators for cotton original fabric 180 dm3/m2×sec., For the treated composition based on polyvinyl alcohol, NaBH4, and silver nitrate – 175 dm3/m2×sec. The breaking load of the fabric is: for the initial – 311 N, for treated – within 320–360 N. The indicators of air permeability and strength characteristics of cotton fabric treated with the proposed composition comply with the regulatory requirements for this group of fabrics.
The article deals with the study of the antimicrobial activity of shoe insoles treated with biocidal compositions . Antimicrobial treatment was carried out in distilled water using the following chemical agents: polyvinyl alcohol (PVA), salicylic acid (SA), copper sulfate, urea, polyvinylpyrrolidone (PVP), benzoic acid. The antimicrobial activity of the modified materials was determined against test cultures - E. coli and molds p.Penicillium. It was found that the studied samples of shoe insoles have a stable antibacterial effect - the growth inhibition zone is from 2 mm to 4 mm, but there is no fungal resistance.
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