Promising material for hybrid photodynamic therapy consisting of Ce0.5Y0.35Tb0.15F3 crystalline nanoparticles and Radachlorin is reported. One possible option of conjugation of Ce0.5Y0.35Tb0.15F3 nanoparticles and Radachlorin using polyethylenimine (PEI) is tested. The energy transfer reaches 28%. It is shown that conjugates of CeF3—Tb3+ NPs and Radachlorin using PEI—are stable, and the distance between nanoparticles and photosensitizer molecules is about 5 nm.

Financial stability, on the one hand, is a criterion of the financial position of the organization at the moment, and on the other hand, it allows you to assess the prospects for business development, its stability in the future. It is also the main indicator of the effectiveness of financial and economic activities, the implementation of management decisions. The sequence of economic and statistical analysis of financial stability should be built in such a way that users can get an objective impression of the prospects for the development of the organization, take measures to strengthen financial stability, adjust its level, assess the risks of investing in the enterprise and its lending. The article considers and summarizes the methods and approaches used in the process of conducting an economic and statistical analysis of the stability of the financial situation of an economic entity. The sequence of the analysis of financial stability indicators is given, their interrelation and the effectiveness of economic and statistical analysis are revealed.

The objective of this work is to analyze the impact of seasonality on the socio-economic development of rural areas of the southern part of Karelia. This study is based on the field data obtained via semi-structured in-depth interviews with experts from the local community. The results show that the influence of seasonality is rather indirect, being a constituent of other factors: economic, infrastructural, institutional, social, etc. Although seasonality is most often perceived as a negative phenomenon regarding socio-economic development, modern types of economic activity characterized by a peak of activity in different seasons of the year mitigate the effect of seasonality and even benefit from being seasonal. Based on the materials collected, a typology of rural settlements of the southern part of Karelia based on the nature of the effect of seasonality has been developed (with a predominantly positive and predominantly negative effect).

Intensive development of small businesses in rural areas is one of the priority directions of state policy in the field of sustainable development of the agrarian economy and rural areas. At the same time, the level of professional legal awareness and entrepreneurial thinking among farmers largely determines the effectiveness of small agricultural formations. This level depends on many factors, including the availability of knowledge of taxation issues, the ability to competently maintain accounting records, observing the requirement of rationality, the ability to navigate the regulations governing this organizational form of doing business. The article discusses the procedure for the formation and features of the presentation of reporting forms of activity of peasant (farmer) farms taking into account various factors of activity, since it is this area that underlies the construction of the entire system of accounting and analytical work.