In this research work, the mass spectra of N, N'-hexamethylene-bis-[(m-cresolyl)-carbamate], i.e. MEE-2, were studied. During the fragmentation of bis-carbamate, ions such as m-methylphenyl, hexamethylenediamine, carbamate and others appeared. As a result, ions were identified that proved the elemental composition, molecular weight, chemical bonds, brutto and structural formula of MEE-2 bis-carbamate
15.02.2024 Volume 3 Issue 2 View more Download
The world's population has exceeded 8 billion people and the problem of food supply has become even more acute due to the reduction of arable land, fresh water reserves and soil salinization. Mineral fertilizers are the main factor ensuring the growth of agriculture. The chemical industry of the Republic meets the needs of the agro-industrial complex with nitrogen and potassium fertilizers in sufficient quantities, which cannot be said about phosphorus-containing fertilizers. Of all the types of mineral fertilizers produced in the country, only simple, enriched superphosphates and nitrocalcium phosphate fertilizers contain calcium, which is a macronutrient and helps reduce soil salinity. All this indicates the need to increase the production of phosphorus- and calcium-containing fertilizers
13.02.2024 Volume 3 Issue 2 View more Download
Sentiment analysis of many comments written by users and extracting useful information for solving classification problems is an important task of natural language processing (NLP). This can affect not only customer satisfaction, but also the further development of the company. In this article, we have prepared a Dataset using feedback given to restaurants located in the city of Tashkent on the Google map and analyzed Sentiment using Logistic Regression models. Overall evaluation results show that the system performs well by performing pre-processing steps such as stemming for agglutinative languages, resulting in 91% accuracy in the best performing model.
13.02.2024 Volume 3 Issue 2 View more Download
This article analyzes the importance of corporate governance in the activity of commercial banks. Also, the views of scholars on corporate management and the ongoing reforms are given. The views of foreign scientists on the role of corporate management in banking activities were studied and recommendations were given to eliminate the shortcomings
13.02.2024 Volume 3 Issue 2 View more Download
The article discusses the issues of automation and modeling of technological processes for growing green mass in a greenhouse complex with a controlled microclimate. A mathematical model of the behavior of such a complex is presented, which makes it possible to control the growth of green fodder. To simulate the behavior of the greenhouse, a computer model of the temperature control system was used, and the components of its object level are carried out.The article discusses the problem of assessing the influence of factors, in particular, ambient temperature on the growth of green fodder on the basis of a temperature control model. A comparative study of the morphophysiological parameters of green mass seedlings was carried out, in greenhouse conditions, depending on the intensity of the ambient temperature, the optimal temperature regime for the growth of green mass was revealed.
07.02.2024 Volume 3 Issue 2 View more Download
ISO/IES 17025 sets general requirements for the competence of laboratories and organizations performing testing and calibration. This standard plays an important role in ensuring the accuracy and reliability of results obtained in laboratories by establishing a quality management system, personnel requirements, measurement methods and traceability of measurements. Compliance with ISO/IES 17025 helps demonstrate the laboratory's competence and increases confidence in its results. This standard is of great importance to ensure the accuracy and reliability of the results obtained in laboratories. It promotes the establishment of high standards of competence and independence, which in turn guarantees the quality of laboratory work. This approach is necessary to ensure confidence in the obtained analytical and test results
07.02.2024 Volume 3 Issue 2 View more Download
This work compares the thermal stability of natural textile materials, flame retardants and natural textile materials modified with flame retardants, and also studies the mechanisms of thermal stability and synergistic effect
07.02.2024 Volume 3 Issue 2 View more Download
SCIENCE & INNOVATION