An important role in solving protein deficiency is the rational use of secondary raw materials in the food industry. The authors found the optimal combination of proteins of dairy, meat and vegetable origin. The balance coefficient of amino acid composition was chosen as the optimization criterion

The widespread introduction of information technologies makes significant changes in various spheres of human activity. The education sector is no exception. In this regard, in this article, the author considers the actual problem of developing electronic textbooks and is one of the most relevant and promising areas of informatization of the educational process. The analysis of the works of scientists A.A. Andreev, A.I. Bashmakov, T.I. Koval, V.M. Kukharenko, E.S. Polat, P.I. Serdyukov, S.S. Sysoeva, A.Yu. Uvarova was conducted. These works contain requirements for the development of electronic textbooks. Based on the results of the analysis, the author described the stages of developing electronic textbooks, the principles that they should correspond to, and also provided a list of modules that should make up an electronic textbook. From the existing variety of software packages, the author distinguishes CourseLab, Smart Builder, MOS Solo, Google Sites, iSpring Suite, TurboSite, Adobe Animate, HTML5. The development of electronic textbooks based on the technology presented by the author of the article and their subsequent application in the educational process will help to organize the educational and cognitive activities of students at a more effective level. Purpose is the description of the technology for the development of electronic textbooks, taking into account existing requirements. The article uses methods of analysis, synthesis and deduction. The analysis of requirements and principles of development of electronic textbooks is carried out on the basis of the descriptive-analytical method. The practical result of the proposed technology is the developed electronic textbook "Development of mobile applications". The results of the study, in addition to their theoretical significance, also have practical significance, which consists in the positive dynamics in resolving the contradiction between the continuously increasing flow of information and the limited opportunities of students to assimilate it. The conscious use of electronic textbooks in the educational process is one of the fundamental ways to improve the quality of education by changing the methods of teaching used in the direction of individualization and focus on the student.