The article discusses energy-saving issues and schematic diagrams in solar greenhouses' heat-cooling supply systems using heat pump installations. The main directions of energy saving have been identified and an alternative system of heat-cooling supply of a solar greenhouse with a heat pump installation has been developed. Shown questions energy savings are considered in the system heat chill of the provision vegetable vault with the use of heat pumping installation. Based on the research analysis, existing systems heat chill of the provision solar greenhouse revealed main trends in energy savings and is designed alternative system heat chill of the provision solar greenhouse with heat by pumping installation.
12.06.2023 Volume 2 Issue 6 View more Download
This article focuses on three forms: public television, public radio and public networks. The illustration, taken from one theoretical point of view, gives the type of model construction that can be achieved. In conclusion, the media community is invited to accept the challenge associated with the general mandate of sociologists to contribute to the theory, in this case by building theoretical sound models for understanding the place of the media community in society.
12.06.2023 Volume 2 Issue 6 View more Download
The liver is the main organ in the cells of which biochemical transformations of the products of the digestive hydrolysis of carbohydrates occur and their conversion into glucose — a form available to the cells of the body. The liver is a depot of carbohydrates, since part of the glucose is stored here in the form of glycogen. The liver maintains blood glucose at a constant level — this is the glucostatic function of the liver. With an excess of glucose in the liver, glycogen synthesis from glucose occurs — glycogenesis. After eating a carbohydrate-rich meal, the glycogen content can be up to 8% of the liver weight.
12.06.2023 Volume 2 Issue 6 View more Download
In case of violation of the integrity of the circulatory system, the hemostasis system provides a reduction in blood loss. Hemostasis is maintained in two ways: stopping bleeding with the help of platelets and blood clotting. This section focuses on the enzymatic reactions of blood clotting. Among the many useful and necessary substances for our body, there is a vitamin that is often forgotten. In the course of various studies, a certain substance was discovered that has the property of stopping bleeding. This substance was called vitamin K (from Koagulationsvitamin — vitamin of coagulation).
12.06.2023 Volume 2 Issue 6 View more Download
This article discusses the basic principles of accounting and reporting of funds in an enterprise. The relevance is determined by the importance of competent and correct accounting of funds and reporting according to international standards. The stability of the enterprise in the market is achieved with sufficient and coordinated control of cash accounting.
12.06.2023 Volume 2 Issue 6 View more Download
In the article synthesized 2,3-trimethylene-3,4-dihydropyrido[2,3-d] pyrimidin-4-one from 2-Aminonicotinic acid and pyrrolidone-2 in the presence different agents, such as PCl5, POCl3. Its reduction reaction with NaBH4 carrying out. Obtained 2,3-trimethylene-1,2,3,4-tetrahydropyrido[2,3-d] pyrimidin-4-one – this three-component coupling of a carbonyl, an amine and a hydrophosphoryl compoud leads to α-aminophosphonates, phosphorous acid-formaldehyde; aldehydes in three component system; minomethylphosphonic acid synthesis based on kabachnik-filds reaction. 2,3-trimethylene-3,4-dihydropyrido[2,3-d] pyrimidin-4-one 35% da product obtained. The reason of low reaction yield was studied. Structures were confirmed using IR and 1H NMR spectroscopies. Obtained product reduced using NaBH4 and 2,3-trimethylene-1,2,3,4-tetrahydropyrido[2,3-d] pyrimidin-4-one synthesis was carried out with high yield. 2,3-trimethylene-1,2,3,4-tetrahydropyrido[2,3-d] pyrimidin-4-one and respective aminophosphonic acids were synthesized in three component system with high yield.
11.06.2023 Volume 2 Issue 6 View more Download
Nowadays, creation of waste-free technology, rational use of existing raw materials is one of the urgent issues in industrialized countries. Butadiene is used in many fields due to its unique properties. Butane and butene mixtures contained in natural crude oil waste were isolated and butadiene was obtained based on extractive distillation. To solve these problems, this study proposes new improvements: The extractive distillation section is modified with intermediate heating and the classical columns are replaced by a dividing wall column (DWC) using a heat pump. Rigorous simulations were performed in Aspen Plus for a typical ED process. DWC was found to reduce the energy intensity of the classical distillation section of the BASF process by 54.8% and reduce total annual costs by 29.9%. In addition, the intermediate reboiler reduces the energy density of the ED section by 8.3%, while reducing the CAPEX cost of the system due to the need for a smaller recycle compressor
11.06.2023 Volume 2 Issue 6 View more Download
This article focuses on the issue of cash flow, which plays an important role in the activity of every organization, company or company, specifically the methods of cash flow analysis, what are the benefits of this, and the benefits of cash flow analysis for a company, organization or enterprise provides feedback
11.06.2023 Volume 2 Issue 6 View more Download
SCIENCE & INNOVATION