12 research outputs found

    Czech adolescents' remote school and health experiences during the spring 2020 COVID-19 lockdown

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    Schools around the world were closed during the spring 2020 lockdown to reduce the spread of COVID-19. As such, these rapid changes to adolescent daily routines may have had immediate as well as long-term effects on their physical, social, and mental health. Therefore, the aim of this study was to examine the experiences, health behaviors and perceived change in health behaviors among adolescents in Czechia during the spring 2020 lockdown. Adolescents (n = 3,440, 54% girls; M-age = 13.5 years, SD = 1.6) from all regions of Czechia were recruited to complete a self-report survey based on the Health Behaviour in School-aged Children study, with additional items on household disruptions and socialization during lockdown, as well as items on perceived changes in health behaviors during lockdown. First, we described the self-reported impacts of the spring lockdown by gender and grade. Second, log-linear analyses were used to examine the perceived behavioral changes based on standardized cut-off values reporting for health behaviors and gender. Less than a third, 19% and 32% of the respondents reported economic and psychosocial disruptions to their family life, 79% indicated they had positive opportunities for family interactions or learning new things. Girls and older adolescents reported the worst levels of social and mental well-being. Changes in respondents' perceived health behaviors varied by reported behavior frequencies and gender. These results may be useful to compare with future secular trends, and may serve as input in developing strategies to counter the impact of the spring 2020 or future similar lockdowns on the adolescents' well-being.Web of Science22art. no. 10138

    Effect of ponds and pond systems on the composition of the benthos in horní Lužnice

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    The work is focused on monitoring changes in benthic communities in the longitudinal gradient of the river Lužnice. The river flows through to the pond area Třeboňsko and the largest pond of the Czech Republic - Rožmberk. It is examine affect of pond on benthic communities. The work involves collecting benthos according to the PERLA method on four profile in four seasons, the analysis of chemical parameters and data processing. The values of SI (saprobiological index) in the longitudinal gradient were from SI 1.8 to SI 2.6. SI values were at the outflow of Rožmberk higher than at inflow. The lowest values were in the first profile Suchdol (SI 1,8 ? SI 2,1) and higher values were in the last profile Vlkov (SI 2,4 ? 2,6). The chemical parameters at outflow were observed increased values of BOD5, TOC, NL105, NL505, chlorophyll and total P but lower values of nitrogen forms (Ntotal,NH4, N-NO3-). On the each profile was the significant change in the incidence or absence of certain groups. Profiles Suchdol and Hlína were diferent than Lužnice and Vlkov especially in the presence of stoneflies, dragonflies, beetles, and individuals generally indicates good water quality. Profiles at outflows from Rožmberk (Lužnice and Vlkov) showed a continued presence of bloodsuckers and more species indicating high organic pollution. NMDS method confirmed impact of sites in communities rather than period (R2 = 0.6 at significance level of p = 0.001)

    The Composition of Natural Diet of fish in the Lipno Reservoir inlets

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    This bachelor work is dealing with the composition of natural food of fish in the chosen streams. Many samples were taken from five streams during the spring and autumn seasons at the same area called the Šumava Mountains according to PERLA method. The first two streams are called Hamerský and Pestřice. They are the inlets of Lipno reservoir. The next three - Horský, Mlýnský and Bukový belong to the River Danube. Despite of the fact that these streams are situated at the same area and have very similar flows, fish abundancy and the way of farming in their basins differ. These aspects influenced the benthos composition in every single stream and that is why this work should provide survey about the composition and biomass of benthos in particular watercourse. The richest is Mlýnský stream in term of the abundance of benthic organism. By the streams which are parts of basins of Danube river, was the most dominant kind Gammarus Fossarum and Limnius perrisi. By the Lipno reservoir inflows, there were the most numerous may flies (Ephemeroptera), represented mostly by the tribe Baetis (Hamerský stream) and the Trichoptera kind with the dominant Anomallopterygella chauviniana from the Trichoptera group (Pestřice stream). There are some differences of the composition and abundance of benthic groups between streams belonging to basins of Danube river and the streams influent to Lipno reservoir. According to the particularity of index number, Lipno?s streams are similar with the streams influent to Danube river from 23% (Pestřice stream) and from 45% (Hamerský stream)

    Ohlas na selekci na velikost kořenového systému u jarního ječmene

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    I created 12 populations crossing four varieties of spring barley Jersey, Diplom, Saloon, Prestige. Varieties with greater root system size (RSS) better use soil water and nutrients in dry environment than varieties with smaller RSS. I studied effect of selection in 12 populations developed by mutual crossing of 4 parents in F3 generation as response on selection in preceding generation F2 for great (A) and small (B) . Six plants with the greatest (A) and six with the smallest (B) RSS from 24 plants were selected in each population. In F2 generation had the A-plants RSS greater by 39.7% and B plants smaller by 43.1% in comparison with the average of the four parents. In progeny (F3 generation) the difference amounted +3.9% and -2.3% for RSS and +8.1% and -5.1% for grain yield respectively. The selection differences in F2 generation were inherited into F3 by 9.8% in A- and by 5.3% in B-selection. Varieties Saloon and Diplom increased and other two varieties decreased the RSS in their progenies. Combinations Diplom x Saloon and Diplom x Prestige showed the greatest RSS (6.48 and 6.22 nF, respectively), the smallest RSS had a combination with only 1.81 nF. It can be concluded that recombination of some varieties showed greater RSS in progenies than was that of the parents, inheritance was comparable with grain yield and selection for the trait was effective. Selection differences were reflected about two times more in grain yield

    The Use of Continuous Glucose Monitoring Combined with Computer-Based eMPC Algorithm for Tight Glucose Control in Cardiosurgical ICU

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    Aim. In postcardiac surgery patients, we assessed the performance of a system for intensive intravenous insulin therapy using continuous glucose monitoring (CGM) and enhanced model predictive control (eMPC) algorithm. Methods. Glucose control in eMPC-CGM group (n=12) was compared with a control (C) group (n=12) treated by intravenous insulin infusion adjusted according to eMPC protocol with a variable sampling interval alone. In the eMPC-CGM group glucose measured with a REAL-Time CGM system (Guardian RT) served as input for the eMPC adjusting insulin infusion every 15 minutes. The accuracy of CGM was evaluated hourly using reference arterial glucose and Clarke error-grid analysis (C-EGA). Target glucose range was 4.4–6.1 mmol/L. Results. Of the 277 paired CGM-reference glycemic values, 270 (97.5%) were in clinically acceptable zones of C-EGA and only 7 (2.5%) were in unacceptable D zone. Glucose control in eMPC-CGM group was comparable to C group in all measured values (average glycemia, percentage of time above, within, and below target range,). No episode of hypoglycemia (<2.9 mmol) occurred in eMPC-CGM group compared to 2 in C group. Conclusion. Our data show that the combination of eMPC algorithm with CGM is reliable and accurate enough to test this approach in a larger study population
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