Произведен подбор условий глубинного культивирования гриба P. ostreatus для получения наибольшего выхода биомассы. Для выращивания грибов глубинным методом были выбраны источники углерода и азота, в качестве замены глюкозе и пептону в составе стандартной среды. Кроме того, был изучен рост P. ostreatus на средах с различными начальными значениями рН и при различных скоростях растворения кислорода. В результате были определены значения pH и степень аэрации среды культивирования, обеспечивающие наибольший выход биомассы. В качестве источника углерода выбраны цельносмолотая ржаная мука и пшеничная мука второго сорта, в качестве источника азота выбрана соевая мука. Биомасса P. ostreatus может быть использована для получения β-глюкан содержащих препаратов, применяемых в качестве самостоятельных БАВ или функциональной добавки для обогащения молочных и других пищевых продуктов.
Search for additives that increase the wear resistance of rubbers is relevant. It is known that the introduction of hollow corundum microspheres (NCM) into rubber reduces the wear of rubber products. The uniform distribution of small amounts of microspheres in rubber by traditional "dry" mixing in a rubber mixer or on rollers is difficult. Microspheres were introduced into rubber at the stage of its separation from latex. The work consisted in the selection of thickeners capable of holding the NSM in rubber latex SCN-18SNT at the stage of its coagulation, and evaluation of physical and mechanical properties of rubbers in the presence of NCM. The retention capacity of thickeners of polyacrylamide (PAA), carboxymethylcellulose (CMC) and polyvinyl alcohol (PVA) was determined. Thickened latex was coagulated in the presence of microspheres with polymeric coagulant and sulfuric acid. When filling the polymer with microspheres, it is preferable to use a PAA thickener. The yield of microspheres in rubber using thickeners PAA, CMC and PVA was 71.1, 66.5 and 38.7% , respectively. The physico-mechanical characteristics of rubbers based on SKN-18SNT in the presence of microspheres introduced both as a "dry" method in rubber and at the stage of its isolation from latex are determined. The presence of microspheres in an amount of 4.4-4.7% by weight. on rubber, did not affect the hardness and elasticity of rebound rubbers. It has been confirmed that the presence of microspheres, especially those introduced from the latex rubber release stage, provides an increase in abrasion resistance. In turn, the presence of microspheres in rubber with traces of polyacrylamide provided an increase in the resistance of rubbers to tearing, the modulus at 100 and 200% elongation with a decrease in the elongation at break.
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