英語授業におけるアクティブ・ラーニングの実質化をめざして

This paper deals with the study of the antioxidant activity of diterpene glycoside of stevioside in the absence of stress factors and under the influence of heavy metals. Results showed different response of stevioside to - it reduced catalase activity by 34% as compared to control, but virtually had no effect on the enzymatic activity of an ascorbate peroxidase. Heavy metals at suboptimal concentrations (10 μM) also did not significantly change the activity of the studied enzymes. Growing of plants at a sublethal concentration of pollutants (1 mM) was accompanied by a sharp increase in the activity of ascorbate peroxidase, and, otherwise, decrease in catalase activity. Plants pretreatment with diterpene glycosides ensured reduction of the negative effects of heavy metals on the activity of these enzymes, i.e., ascorbate peroxidase activity was lower and catalase activity was higher. The influence of stevioside also led to 4-fold increase in the content of non-enzymatic antioxidant - proline that may indicate an increasing stress resistance of plants to negative environmental factors

Some aspects of a healthy lifestyle of the first-year student, Omsk state pedagogical university

In this article on a basis questioning of first-year students aspects of introduction of a healthy lifestyle are revealed. Recommendations and methods of fight against addictions have been madeВ данной статье на основе анкетирования студентов первого курса выявлены аспекты ведения здорового образа жизни. Были даны рекомендации и методы по борьбе с вредными привычкам

Моделі соціального захисту населення

Тимофєєва А. О. Моделі соціального захисту населення / А. О. Тимофєєва // Людина, суспільство, політика: актуальні виклики сучасності: матеріали ІІ Міжнародної науково-практичної конференції (м. Одеса, 13-14 лютого 2015 р.) / НУ «ОЮА», Одеське відділення Міжнародної асоціації студентів політологічної науки, за заг. ред. Д. В. Яковлева – Одеса : НУ «ОЮА», 2015. – С. 61-64

Evaluation of origin-destination matrices based on analysis of data on transport passenger flows

The problem of reconstructing the origin-destination matrix for transport following fixed routes is studied. Estimates are based on statistics on passengers entering and leaving at each stop. Various models for estimating of origin-destination matrices are analyzed, including the entropy model and the generalized gravitational model. The properties of correspondences of duplicating and complementary routes are taken into account for comparing the models. © 2021 Author(s)

Technology of Water Purification With Chlorinated Derivatives and Assessment of Risk Associated With Human Exposure to These Substances

In the given paper the authors consider the technology of water purification with consideration to the recommendations of the World Health Organization (WHO), European Union (EU) and standards of developed countries. Carcinogenic Unit Risk (UR) magnitude for people constantly exposed to the analyzed carcinogens in the course of a lifetime is estimated. The authors calculate and evaluate unique carcinogenic risk as a complementary probability of cancer development during the whole life of CR when introducing EU standards into water purification technology

Oryzalin-induced changes in water status and cytoskeleton proteins of winter wheat seedlings upon cold acclimation and ABA treatment

The effect of oryzalin (a specific inhibitor of tubulin polymerization in plant cells) on water retention by the leaves and roots of winter wheat (Triticum aestivum L.) seedlings was studied. The cultivars differing in their frost resistance were compared after their acclimation to low temperature (3°C for 3 or 7 days) and after treatment with ABA. In control untreated plants, oryzalin reduced the water-retaining capacity (WRC) of leaves and roots. Both hardening and ABA lowered the effect of the inhibitor on WRC in leaves, whereas their effects on water retention by roots were opposite, i.e., hardening weakened and ABA intensified the effect of oryzalin. Oryzalin-induced reduction of WRC decreased in the following sequence of cultivars: weakly frost resistant → moderately frost resistant → highly frost resistant. It was more pronounced in the leaves than in the roots, the latter being characterized by the lower WRC and lower frost resistance. After three-day-long hardening of plants, an additive effect of hypothermia and ABA on oryzalin-induced decrease in WRC of leaves and the lack of such effect in the roots were observed. The immunochemical analysis of the composition and content of cytoskeletal proteins with Western blotting showed that in the leaves the actin/tubulin ratio was higher than in the roots. The treatment of nonacclimated plants with ABA lowered the content of α- and β-tubulins and actin in roots but did not affect the level of actin in leaves. Hardening negated the effects of ABA on cytoskeletal proteins. Oryzalin produced the greatest inhibitory effect on WRC and an increase in frost resistance in ABA-treated plants in the experiments with leaves of the weakly frost resistant cultivar before and after hardening. Organ- and cultivar-specific and ABA-mediated dependence of WRC on cytoskeletal proteins and microtubules and microfilaments formed by them is supposed to result from their effect on the state of intracellular water and water permeability of the plasma membrane. In the course of cold acclimation of plants and upon their treatment with ABA, this dependence was more distinctly expressed in leaves than in roots, and especially in the plants of the weakly frost resistant cultivar

The antioxidant properties of stevioside under the influence of heavy metals

This paper deals with the study of the antioxidant activity of diterpene glycoside of stevioside in the absence of stress factors and under the influence of heavy metals. Results showed different response of stevioside to - it reduced catalase activity by 34% as compared to control, but virtually had no effect on the enzymatic activity of an ascorbate peroxidase. Heavy metals at suboptimal concentrations (10 μM) also did not significantly change the activity of the studied enzymes. Growing of plants at a sublethal concentration of pollutants (1 mM) was accompanied by a sharp increase in the activity of ascorbate peroxidase, and, otherwise, decrease in catalase activity. Plants pretreatment with diterpene glycosides ensured reduction of the negative effects of heavy metals on the activity of these enzymes, i.e., ascorbate peroxidase activity was lower and catalase activity was higher. The influence of stevioside also led to 4-fold increase in the content of non-enzymatic antioxidant - proline that may indicate an increasing stress resistance of plants to negative environmental factors

About some economic applications of cohort analysis

Nowadays, there is the problem of evaluating the return on advertising costs for industries with a delayed conversion. Cohort analysis is a series of studies which are conducted at certain time intervals. Using cohort analysis we can better assess the effectiveness of advertising channels for industries with a delayed conversion. Cohort analysis can be used to analyze following items: efficiency in the context of "traffic sources", usefulness of changes on the web site; assessment of effectiveness of marketing campaigns; assessment of impact of seasonality on the behavior of the user; the decision-making period. The article presents an overview of tools we can use to collect data for analysis. The article also describes the method of selection and the variants of the cohorts to construct the analysis. For demonstration of the proposed method and calculation variant, there is considered the practical example of building a cohort analysis. Using these method and the example of calculating, the companies with delayed conversion can analyze the effectiveness of Internet advertising for different advertising channels. © 2018 Author(s)

The chemical structure of steviol-glycosides as base of biological activity

© 2016,International Journal of Pharmacy and Technology. All rights reserved.This article is dedicated to study of the peculiarities of influence of glycosides extracted from Stevia Rebaudiana plant,namely stevioside,steviolbioside,rebaudioside A and C as well as of commercial mixture of steviol-glycosides “Sweta” on growth as well as on physical and biochemical processes of wheat plants. Compounds with glycoside nature often demonstrate various types of biological activity. The chemical structure of stevia glycosides is similar to the well-known plant growth and development regulating chemicals,i.e. gibberellins and alongside with that these glycosides induce the same physiological reactions in plants as gibberellins do. This fact puts glycosides within the zone of intense interest from the point of view of phytophysiological investigations. Since the difference between the mentioned compounds lies in composition and structure of a carbohydrate branch of a glycoside molecule study of correlation between the structure and the biological influence of such molecules on plants is the question of major priority. The article represents data indicative of direct relation between the chemical structure of a carbohydrate branch of a glycoside molecule and the impact on Triticumaestivum plants induced by it. There was demonstrated ambiguous nature of the studied compounds impact on the physiological and biochemical state of wheat plants