Saracura-Mirá, a Proposed Brazilian Amazonian Adaptogen from Ampelozizyphus amazonicus

The Amazon Forest is known all over the world for its diversity and exuberance, and for sheltering several indigenous groups and other traditional communities. There, as well as in several other countries, in traditional medical systems, weakness, fatigue and debility are seen as limiting health conditions where medicinal plants are often used in a non-specific way to improve body functions. This review brings together literature data on Ampelozizyphus amazonicus, commonly known in Brazil as “saracura-mirá” and/or “cerveja de índio”, as an Amazonian adaptogen, including some contributions from the authors based on their ethnographic and laboratory experiences. Topics such as botany, chemistry, ethnopharmacological and pharmacological aspects that support the adaptogen character of this plant, as well as cultivation, market status and supply chain aspects are discussed, and the gaps to establish “saracura-mirá” as an ingredient for the pharmaceutical purposes identified. The revised data presented good scientific evidence supporting the use of this Amazonian plant as a new adaptogen. Literature data also reveal that a detailed survey on natural populations of this plant is needed, as well as agronomical studies that could furnish A. amazonicus bark as a raw material. Another important issue is the lack of developed quality control methods to assure its quality assessment.

Strategies of portfolio investment with estimates of bull and bear markets

The financial market has non-linear patterns, with different return behavior in bull versus bear markets. This article uses multivariate model estimates to study portfolios in changing conditions, and develops investment strategies for portfolios in light of uncertainty about the bear or bull status of the stock market. Portfolios were optimized for the main stocks listed on the Brazilian market index Ibovespa. The portfolios proposed with estimates of changing market status outperformed others over the analyzed period, with rebalancing adjustments made either weekly or monthly.

E-Commerce and the Factors Affecting Its Development in the Age of Digital Technology: Empirical Evidence at EU–27 Level

The purpose of this study is to identify the factors influencing e-commerce and to evaluate the long and short-term impacts on the development of e-commerce activity. After establishing the hypotheses to verify, we use multiple panel regressions to test the influence of education level, consumer’s residence, consumer’s labour market status, internet banking, mobile and non-mobile users on the development of e-commerce. For this matter, in this paper, by adopting the fully modified ordinary least squares (FMOLS) method and a vector error correction model (VECM), we performed an empirical analysis of the nexus between education level, consumer’s residence, consumer’s labour market status, internet banking and mobile and non-mobile users and e-commerce, based on panel data for EU–27 countries from 2011 to 2020. The results of the study indicate that all the variables involved in the two econometric models and associated with education level, consumer’s residence, labour market status, internet banking, mobile and non-mobile users, all have significant impacts on the development of e-commerce. Most of the variables positively influence the development of e-commerce except for internet purchases by individuals un-employed and for internet purchases by non-mobile users that are negatively correlated with e-commerce activity.

Changes in the labor market status during the COVID-19 pandemic and subjective well-being of Russians

This paper investigates the association between changes in the labor market status and subjective well-being of Russians during the COVID-19 pandemic. The materials of the first stage of the international project “Values in crisis” form the empirical dataset. Regression analysis shows that individuals who lost their jobs or closed their business during the initial period of the pandemic are somewhat less satisfied with their lives than those who did not. Being reduced to part-time work and working from home are not directly related to subjective well-being. At the same time, the strength of the association between subjective well-being and possible changes of the labor market status depends on such factors as the presence of children, as well as the value of self-enhancement (according to Schwartz) and conscientiousness (one of the Big Five personality traits). The job or business loss is associated with a decrease in subjective well-being among respondents without children; this association is not observed among those with children. In addition, the negative relationship between life satisfaction and job or business loss is stronger among individuals with high level of self-enhancement and weaker among those with high level of conscientiousness. Among respondents who had to switch to part-time or remote work, having children reduces the level of subjective well-being; among those without such experience, it is positively associated with subjective well-being.

Changes in the labor market status during the COVID-19 pandemic and subjective well-being of Russians

This paper investigates the association between changes in the labor market status and subjective well-being of Russians during the COVID-19 pandemic. The materials of the first stage of the international project “Values in crisis” form the empirical dataset. Regression analysis shows that individuals who lost their jobs or closed their business during the initial period of the pandemic are somewhat less satisfied with their lives than those who did not. Being reduced to part-time work and working from home are not directly related to subjective well-being. At the same time, the strength of the association between subjective well-being and possible changes of the labor market status depends on such factors as the presence of children, as well as the value of self-enhancement (according to Schwartz) and conscientiousness (one of the Big Five personality traits). The job or business loss is associated with a decrease in subjective well-being among respondents without children; this association is not observed among those with children. In addition, the negative relationship between life satisfaction and job or business loss is stronger among individuals with high level of self-enhancement and weaker among those with high level of conscientiousness. Among respondents who had to switch to part-time or remote work, having children reduces the level of subjective well-being; among those without such experience, it is positively associated with subjective well-being.

Research on the Consumption Trend, Nutritional Value, Biological Activity Evaluation, and Sensory Properties of Mini Fruits and Vegetables

Mini fruits and vegetables (MFV) are pocket fruits and vegetables whose shape and volume are significantly smaller than those widely sold and well-known normal fruits and vegetables (NFV) on the market. Through the research on the market status and consumption trends of MFV, it was found that MFV have recently become a new market favorite. However, compared with NFV, there was found to be no relevant data on sensory quality, nutritional value, safety, etc. of MFV; this could indicate low consumer awareness of MFV, which in turn affects their planting and sales choices, as well as the market scale remaining small. In this context, six MFV with high degree of marketization were selected and compared with their corresponding NFV to evaluate the nutritional value, biological activity, and sensory properties. The results showed the nutritional value of MFV to be mainly related to their species. The nutritional value of MFV derived from immature, tender vegetables was generally lower than that of mature NFV. For example, the content of zeaxanthin in normal maize was 0.43 mg/kg, which was about 2.87 times that of mini maize (0.15 mg/kg). For newly cultivated mini varieties, their nutritional value often had different trends and rules compared with NFV. The nutritional value obtained by consuming MFV is not equal to that obtained by consuming the corresponding NFV of the same weight.

Dropping out – Hungarian experiences at vocational training

The proportion of people with low school qualifications remains significant in Hungary, which not only makes it difficult for them to enter the current labour market but may also exclude them in the long term. For the increasing number of people with a low level of education, dropping out seems to be one of the most common reasons. Prevention as a determinative measure can provide answers to this problem. The study focuses on the issue of secondary school drop-out. The study results were based on the methodology of questionnaire surveys and semi-structured conversations. Based on the information obtained from the survey, this study continuously presents the results connected to drop-out conditions and compensatory measures. The study results highlight the significant effects of school and family, including previous school experiences, influence on the place of residence, the labour market status. The conclusions drawn from the results address the topic in a practical way and provide an opportunity to develop a possible action plan to prevent drop-outs.