The Definition of World's Fundamental Constants – the Numbers ℮ (on the Example of Laboratory Work "Measurement of the Number ℮, by Digitizing Image Hanging Chain»)

The article deals with one of the ways to calculate the number ℮ - digitizing the image of a hanging chain. The problem of the study is how to measure the number ℮ with the least error. The aim of the study is to measure the number℮, one of the fundamental world constants, by digitizing images of a chain freely suspended in the gravity field. The result of the study is the value of the experimental value of the number ℮ with a relative error of 0.004%.В статье рассматривается один из способов вычисления числа ℮ - оцифровка изображения висящей цепи. Проблемой исследования является вопрос о том, как измерить число ℮ с наименьшей погрешностью. Цель исследования - путем оцифровки изображений цепи, свободно подвешенной в поле тяжести, измерить число ℮ – одну из фундаментальных мировых констант. Результатом проведенного исследования является значение экспериментального значения числа ℮ с относительной погрешностью 0,004%

Sex differences in vascular endothelial function and health in humans: Impacts of exercise.

This brief review presents historical evidence for the purported impacts of male and female sex hormones on the vasculature in humans, including effects on macro- and micro-vascular function and health. Impacts of aging on hormonal changes and artery function are considered in the context of the menopause. Physiological data are presented alongside clinical outcomes from large trials, in an attempt to rationalise disparate findings along the bench-to-bedside continuum. Finally, the theoretical likelihood that exercise and hormone treatment may induce synergistic and/or additive vascular adaptations is developed in the context of recent laboratory studies that have compared male and female responses to training. Differences between men and women in terms of the impact of age and cardiorespiratory fitness on endothelial function are addressed. Ultimately, this review highlights the paucity of high quality and compelling evidence regarding the fundamental impact, in humans, of sex differences on arterial function and the moderating impacts of exercise on arterial function, adaptation and health at different ages in either sex. This article is protected by copyright. All rights reserved

Influence of silicon oxide (SiO₂) on the adaptation of microplants of roses (<i>Rose L.</i>) cv. Reine Sammut

The research is devoted to the optimization of the method of adaptation of Reine Sammut microplants of roses using silicon oxide (SiO2) by spraying and watering. For the experiment, there have been used standard microplants obtained by the method of clonal micropropagation, corresponding to GOST 29105.1-91-29105.3-91. Before planting for adaptation, the microplants were cleared from the lower leaves, the roots were washed from the agar nutrient medium in a decimolar solution of potassium permanganate and trimmed to 15-20 mm. Adaptation was carried out in micro-greenhouses on a peat nutrient substrate, made in accordance with TU 20.12.80 001 41790563 2020, in a light room (humidity 36 %, temperature 23...25 ° C, light period duration 16 hours, illumination 8000 Lx). In order to disinfect the substrate, the biofungicide "Trichoderma veride" (1.5 ml/l) was used. Microplants after planting for adaptation were shed and sprinkled in accordance with the experiment options: 1) distilled water (control); 2) 0.01% SiO2 solution; 3) 0.005% SiO2 solution; 4) 0.0025% SiO2 solution. With prolonged ventilation of micro-greenhouses, 28 % of plants in the control variant showed drying of the leaves, which did not occur when using silicon oxide solutions. According to visual diagnostics, the most attractive plant species was when watered and sprayed with 0.01% silica. This concentration of silicon oxide during plant adaptation compared to the control contributed to a significant increase in plant height and shoot length by 50.0 mm and 42.6 mm, respectively (LSD05 = 36.1 and 28.3), and a tendency to increase the number of leaves by 1. 6 pcs., shoot weight 2.0 and roots 1.8 times

The effectiveness of the use of the silicon-containing preparation Siliplant in the case of clonal micropropagation of the rose Reine Sammut

Clonal micropropagation of plants is a modern popular method of vegetative reproduction, which allows to obtain high-quality planting material in a large volume in a short time. The research is devoted to the technology of clonal micropropagation of the rose Reine Sammut, in particular, optimization of the nutrient medium composition. To increase the efficiency of micropropagation, the silicon-containing preparation Siliplant was added to the composition of the nutrient medium according to the Murashige-Skoog (MS) recipe as an alternative to the complex of trace elements. At the stage of the actual micropropagation with the combined use of 6-benzylaminopurine (6-BAP) at doses of 1.0; 2.0 and 3.0 mg/l and Siliplant at doses of 1.0; 2.0 and 3.0 ml/l, no large differences were found. Nevertheless, the inclusion of Siliplant (1.0 ml/l) and 6-BAP (3.0 mg/l) in the medium contributed to an increase in the reproduction factor by 3.1 pcs./cuttings at LSD05 = 1.0 pcs. In addition, Siliplant at a dose of 1.0 ml/l as part of a hormone-free nutrient medium MS contributed to a significant increase in shoot growth (by 4.2 mm at LSD05 = 3.6), and at a dose of 3.0 ml/l stimulated the development of standard micro-plants of roses