Journal of Biology and Medicine: Open Access

The sharp increase in the number of new COVID-19 patients in India in the second half of April 2021 has caused alarm around the world. A detailed analysis of this pandemic storm is still ahead. We present the results of anterior analysis using a generalized SIRmodel (susceptible-infected-removed). The final size of this pandemic wave and its duration were predicted. The obtained theoretical results were compared with the real pandemic dynamics in the summer of 2021 and showed that the COVID-19 pandemic could be a problem for mankind for a very long time.

Keloid etiology is multifactorial. Earlier in our study we advocated that there is a delay in epitheliation and due to continued growth of connective tissue which is coming beyond the surface of the skin and then sealing of the wound takes place. This holds true even now but the mechanism behind this process is still ambiguous. In this review we have mentioned various possible etiological factors and their role in scar formation.

Objective: To determine the gender differences in the effect of sleep disturbances (SD) on risk of myocardial infarction (MI) and stroke in an open population 25-64 years in Russia/Siberia over 16 years of follow-up. Methods: Within the framework of the III screening of WHO's MONICApsychosocial program, a random representative sample of the population of both sexes of 25-64 years of Novosibirsk in 1994 (men n = 657, women: n = 689) was examined. The screening included: socio-demographic data, the definition of the SD. The SD studied by means of the Jenkins scale. The analysis included persons of both sexes without myocardial infarction, stroke. New-onset cases of MI and stroke in women - 15 and 35 cases and in men - 30 and 22 cases, respectively detected in the cohort over 16 years of follow-up. To assess the risk taking into account the different control times a single-factor and multivariate regression models of proportional Cox risks (Cox-regression) were used. Results: In the open population aged of 25-64 years 48,6% of men and 65,9% of women had SD (x2 = 24,427 df = 1 p = 0,0001). In a single-factor Cox regression analysis the risk of stroke was higher among men than among women with SD over 16-year period. Multivariate regression analysis revealed that risk of stroke in men and women is approximately the same among people with SD. Widowed men with SD had an increased risk of developing a stroke. The risk of stroke was higher in men with primary education than women. There was an increased risk of stroke in women with college degree and with sleep problems. Cox single-factor regression analysis showed an increased risk of MI in men with SD over 16-year period in 2.4 times. The influence of SD on the risk of MI in women has not been received. The risk of MI among men with SD who never married was 3-fold, in divorced was 4.3-fold and in widowed men risk MI was 7.5-fold higher than without SD. Conclusion: Sleep disorders are a significant risk factor of stroke in both men and women. The risk of myocardial infarction was only increased in men. A disadvantaged social gradient (single, divorced, widowed) in men was an additional risk factor of myocardial infarction, supplemented by an increased risk of stroke in widowed men. Moreover, primary education was an additional risk factor of stroke in both men and women. 

One of the most pressing problems of higher education institutions is a sports and recreation activities in the discipline of (Physical Education) with students of full-time education in the field of unsportsmanlike profile to suit different trimesters of pregnancy. The purpose of this article is to analysis of changes in the functional parameters of the body of pregnant students as a result of special training set of physical exercises in the institution of higher education, in accordance with the program of extracurricular activities on the subject Physical Education in the School ofthe future mother. Material and Methods: To achieve this goal on the basis of the educational establishment (Vitebsk State University named after P.M. Masherova) within the framework of the School of future mothers, we held sports and recreation activities with pregnant female students for the first time organized in the framework of pedagogical experiment. Methods: Pedagogical experiment, methods of mathematical statistics. Findings and their Discussion: The article contains the results of functional changes occur in the body of pregnant students under the influence of exercise in the framework of the School of future mothers. Classes are special physical exercises which help to strengthen the muscles of the body, especially the muscles of the back. Increases joint mobility of the pelvis and spine. During the lessons students learn skills breathing during labor to increase the oxygen supply of the fetus and proper breathing during labor. Conclusion: The introduction in the educational process methods of fitness training (School of future mothers) for students of the second and third trimester of full-time education for unsportsmanlike specialties in an institution of higher education, in accordance with the program of extracurricular activities on the subject (Physical Education) confirmed its efficiency. It was found that regular classes with pregnant female students have a positive effect on heart rate and blood pressure, which help to increase lung capacity and dynamometer.

Lakes Eleyele and Asejire are tropical man-made lakes (reservoirs) in southwestern Nigeria created for domestic water supply and fisheries. The abiotic and biotic features of the two lakes have been studied by various researchers. However, there is little or no study on the bacteria community despite being of ecological and public health concern. In this article, the bacterioplankton composition and diversity of Eleyele and Asejire Lakes were investigated by sequencing 16S rRNA gene clones. Our results showed that proteobacteria was the dominant phylum in Eleyele Lake, while actinobacteria phylum dominated in Asejire Lake. In both lakes, bacteria that contribute to prokaryotic primary production (Limnohabitans, Methylobacterium, and Methylotenera) and biogeochemically significant bacteria were encountered. Polynucleobacter was the predominant genus in Lake Eleyele and this could be related to the physicochemical parameters. Large number of bacterioplankton in the Eleyele and Asejire Lakes could not be classified into known taxonomic unit indicating largely unknown bacterial composition.