At present the bulk of all water bodies in the Russian Federation and the Republic of Tatarstan in particular is experiencing significant anthropogenic impact. One of the types of impact is thermal. The article shows the positive effects of thermal contamination on lake-type basin-cooler such as increasing of the concentration of dissolved oxygen in the water in winter, improving the state of bottom sediments as a result of the water circulation, and expanding the possibilities of aquaculture. The possibilities of integrated use of lake-type coolers for recreational purposes are shown (combining the technical use of lake water with recreational purposes through the implementation of sporting events and the creation of a park and observation zone on the lake).
In a time when increasing anthropogenic impact on the environment, particularly on the water ecosystems, determine the water status of reservoirs (by physicochemical and biotic indicators) in order to highlight priorities at the field of water protection and management is the urgent question. In this case, the particular significance has lakes located within megalopolis and which is multiple-use objects. The article discusses in detail how to change temperature condition of basin-cooler of heating plant: vertical and horizontal. As a result of analysis of physicochemical indicators the water quality index is displayed. Index allows you to estimate the water quality by the rate of pollution through the use of perspective an integrated indicator-total antioxidant activity. Special attention is given to such physicochemical indicator as redox potential.
The question of natural water quality for a long time has wondered researchers and ordinary citizens. Cities expanded, population increases, it leads to a deterioration in natural waters by sanitary-chemical and microbiological indicators. In this regard, this article concerns the question of the monitoring of physicochemical indicators and introduction the new indicator – Redox potential (Eh). Dynamics of Eh changes in the rivers of the Republic of Tatarstan and surrounding areas as well as natural and artificial water reservoirs, including basin-coolers of energy facilities are researched in this article. Conducted full-size data and experiments made it possible to establish the Eh sensitivity in relation to the pH. In the article has showed the possibility of introducing Eh indicator into the assessment of water quality on the assumption of further consideration and detail.
The aim of the study was to investigate the relationship between a decrease in the left ventricular ejection fraction (EF) and traditional ECG signs associated with structural changes of the myocardium (pathological Q wave, ventricular arrhythmias) and relatively new and poorly understood (fragmented QRS complex (fQRS), early repolarization pattern (ERP)) and evaluate their significance for identifying patients with mildly reduced EF (mrEF). The study included 148 patients who were treated and examined at the Almazov Medical Research Center. FQRS, ERP, pathological Q wave, and premature ventricular contractions (PVC) were described in the analysis of the ECG, and the results of echocardiography and statistical data were analyzed: Fisher’s test and chi-square, correlation analysis, and ROC analysis. According to the level of EF, patients were divided into three groups: group 1—patients with low EF (lEF) (less than 40%), group 2—patients with mildly reduced EF (mrEF) (40–49%); group 3—patients with preserved EF (pEF) (more than 50%). In the first group (EF), fQRS was registered in 16 (51.6%) patients, in the mrEF in 16 (18.2%). Pathological Q wave was detected in lEF in 20 (65%), in mrEF in 10 (35%), 15 (18%), in pEF in 15 (18%). The fQRS has been found to be more important in identifying patients with mrEF. In lEF in 2 (6.5%) patients, in mrEF in 2 (6.9%), in pEF in 11 (12.5%). There was no relationship between ERP, the amount of PVC, and the presence of ventricular tachycardia with EF. FQRS is significantly more common occurred with a decrease in EF and may be a marker of a mrEF. Thus, fQRS is associated with mrEF and pay close attention in routine clinical practice to identify patients at high risk of developing systolic dysfunction.
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