Academic literature on the topic 'Růstové reakce'

Avalanches are important natural processes which shape the character of large mountainous areas. The reconstruction of their history has been performed on avalanche tracks in the Důl Bílého Labe Valley, Krkonoše Mts. through application of dendrogeomorphological methods. In total 101 trees from the area of 5 avalanche tracks were cored or cross-sectioned, which helped to identify 1253 growth disturbances (abrupt growth suppressions or releases, increases in tree-ring eccentricity, traumatic resin ducts, reaction wood, callus or determination of the tree death). The analysis spanning period from the 1859 led to the identification of 40 avalanche events, which prolong and complement written evidences of avalanche falls (avalanche cadastre). However, because of limitations of dendrogeomorphology (especially impossibility of dating of small events), these results have character of only minimal number of events. Strong influence of monthly snow melting and snow accumulation on initiation of events was pointed out through the statistical analysis of snowpack changes in relation to the reconstructed avalanche activity. Two main possible natural reasons for avalanche activity initiation were identified - vast spring snow melting and loading with fresh snow. The analysis demonstrates the potential of...

Charles University Faculty of Pharmacy in Hradec Kralove Department of Biological and Medical Sciences Student: Michaela Bažantová Supervisor: Ass. Prof. Petr Nachtigal, Ph.D. Title of Diploma thesis: Exercise as Medicine: Growth Hormone Response to High- -intensity Interval Training The present research focused on growth hormone response to exercise is part of a wider project related to the beneficial effect of high-intensity interval training and therefore is related to the topic of "exercise as medicine". We hypothesized that as shown by Booth et al, in several systems of our organism (such as the cardiovascular system, skeletal system etc.) our genome is maladapted, because of our reduced physical activity compared to our ancestors. Therefore, also the growth hormone response (GH) to exercise is decreased. Several mechanisms, such as increased lactate concentration in blood, increased hydrogen ion concentration in the blood, afferent signals from muscle metabolic receptors etc., have been proposed as stimuli for the GH response to exercise. The aim of the present research is the study of a possible metabolic stimulus of a relative muscular hypoxia, which is the ratio between energy demand and oxygen availability, as the main regulator of the growth hormone production.

This work deals with the occurrence of the wild service and its growth characteristics in the forest complex Halín near of the Dobruška.Mapping and data collection took place in the growing season of the year 2013. On the basis of the inventory natural investigation of Bachelor's thesis was selected interest area with an acreage of 11 hectares. Here were selected 75 individual trees of wild services, for which were detected the basic mensurational characteristics such as the DBH, height, crown base and perimeter. Using the variables of the growth area, the degree of competition, the ingrowth of the wild service tree to the other crowns and response of changing of perimeter was provided the most suitable criteria for successful wild service tree establishment. According to data collection were introduced optimal dimensions of the growth area for higher efficiency of increment of wood mass. The resulting values should in practice facilitate the care and tending of this woody.

Hyperglycemia in critically ill patients was considered for many years an adaptive response to stress conditions being present in both patients with and without previous history of diabetes. Hyperglycemia is caused mainly by peripheral insulin resistance induced by the factors acting counteracting insulin signalling at the postreceptor level. Furthermore, hyperglycemia itself can then increase serum levels of pro-inflammatory cytokines such as tumor necrosis factor alpha (TNF-α), interleukin-6 (Il-6) and interleukin-8 (Il- 8) and others. On the contrary, peripheral insulin resistance induced by pro- inflammatory cytokines may further potentiate hyperglycemia. White adipose tissue represents in addition to its energy storage function also a very active endocrine active organ. In addition to regulation of a number of metabolic processes it also significantly modulates the inflammatory response. In critically ill patients, adipose tissue changes its morphology, i.e. the adipocytes are shrinking and adipose tissue is abundantly infiltrated by macrophages. Paradoxically, overweight and obese critically ill patients have lower mortality than underweight, lean and morbidly obese subjects. In our studies, we selected population of the patients undergoing elective major cardiac surgery with extracorporeal...