Background: Today, the urgent tasks of feeding cattle is to increase milk yield, increase the fat content in milk, and improve the quality of other animal products. However, the recommended amount of fat is not enough during calving and during lactation of cows. This leads to the fact that the fat content of milk is reduced by 30%. The aim of the study : To study the behavior of encapsulated fats in model media corresponding to the gastrointestinal tract of cattle. Materials and methods: The study was conducted by direct gravimetric analysis using a Programix TX 50 muffle furnace. As model media for the gastrointestinal tract of cattle, standard pH titers were used, adjusted to the required pH value with 0.1 M solutions of hydrochloric acid/sodium hydroxide. Results: After analyzing the data obtained, it was found that in a slightly alkaline medium (pH range 7.4–7.8), the time for complete release of phospholipids is 12 hours. During experiment No. 2, the behavior of “protected fats” was revealed in model environments corresponding to physiological parameters of the gastrointestinal tract of cattle. The equivalent amount of phosphorus to phospholipids was 11.90%, which corresponds to a proportion of the liberated phospholipids of higher fatty acids equal to 97.30%. Conclusion: “Protected fats” reach the model environment of the small intestines of ruminants in an unchanged form, where capsule disintegration is observed, followed by the release of the phospholipid mixture. Full release of the encapsulated mixture in a slightly alkaline medium (pH 7.4–7.8) is achieved within 12 hours.
Hydroxyapatite and its compounds are important and promising inorganic biomaterials that can be used in dentistry and bone surgery due to its biocompatibility with the bone tissue of a living organism. The paper presents the synthesis of carbonate-substituted hydroxyapatite powders and studies their morphology, physical and chemical characteristics and biocompatibility in vivo. The synthetic carbonate-substituted hydroxyapatite are biocompatible, and they do not cause degenerative changes in the surrounding tissues. The result of this research suggests that the carbonate-substituted hydroxyapatite is promising biomaterial for orthopedic and dental prosthetics.
The possibility of imparting an antibacterial effect to cellulose tissue dyed with the product of azo coupling of diazotized 4,4’-diaminostilbene-2,2’-disulfonic acid with 8-hydroxyquinoline has been shown. It was found that fabrics dyed by fixing the dye with a silver salt have a significant antibacterial effect, which lasts at least 10 washings.
The article analyzes the possibilities of competitive and exhibition activities in the virtual museum space for the development of professionally oriented interests and inclinations in children aged 7-14 years. A set of the most effective methods, techniques and forms of organizing competition and exhibition activities has been determined, a specially developed diagnostic toolkit has made it possible to analyze the experimental data obtained as a result of the use of empirical research methods: observation and survey. It was revealed that schoolchildren aged 7-14 are at different stages of professional maturity, from the stage of awakening (younger students) to the stage of professional socialization (younger adolescents). Experimental data have confirmed that competition and exhibition activities contribute to the development of creative thinking, self-actualization of the personality of schoolchildren. The huge educational potential of the competition and exhibition activity has been confirmed. The developed program of competitive and exhibition activities of a chemical orientation, contributing to the formation of professionally oriented interests and inclinations in children aged 7-14 years, will be useful to teachers, museum specialists.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.