Objectives. At the beginning of the War in East-ern Ukraine, military personnel of the Armed Forces, National Guard of Ukraine (NGU), and soldiers of volunteer battalions, who had no combat experience for the first time faced the death of their comrades. This study aims to de-termine the effects of posttraumatic stress and combat losses on the mental health of combat-ants and to develop the typology of their resil-ience to extreme events.Sample and settings.N = 117 NGU male offic-ers (76% of contract military members and 24% of officers) participated in the study. These com-batants were withdrawn from the combat zone in June 2014 due to combat losses and the death of the unit commander.Hypothesis. After participating in hostilities, military personnel developed different types of personality resilience to the effects of traumatic stress.Statistical analyses. The participants’ typification of resilience and adaptation to extreme events was determined by hierarchical cluster analysis. The differences between groups in mean values were determined using Student’s t-test.Results. Four types of personality resilience to combat stressors were identified: “Those who predicted danger” (68.38%), “Those who were open to danger” (21.37%), “Those who identified themself with the role of the vic-tim” (6.83%), and “Those who hid their fear” (3.42%). The results showed that self-identifi-cation of a personality with symptoms of acute stress disorder affects the features of the imple-mentation of the anxiety buffer role. Limitations. The conclusions on the anxiety buffer role for the formation of PTSD require clarification and further studies. and Cíle. Na začátku války na východní Ukrajině vojáci ukrajinské armády (NGU – Národní gar-da Ukrajiny) a vojáci dobrovolnických praporů, kteří neměli bojové zkušenosti, se poprvé setka-li se smrtí svých spolubojovníků. Cílem tohoto výzkumu bylo zjistit dopady posttraumatického stresu a ztrát v boji na mentální zdraví vojáků a vytvořit typologii jejich resilience vůči extrém-ním událostem.Soubor. Výzkumu se zúčastnilo 117 mužů – dů-stojníků NGU (76 % smluvních vojáků a 24 % důstojníků z povolání). Tito vojáci byli staže-ni z bojové zóny v červnu 2014 kvůli ztrátám v boji a smrti velitele jednotky.Hypotéza. Po účasti v bojích si vojáci vyvinuli různé typy osobní resilience vůči dopadům trau-matického stresu.Statistická analýza. Typologizace resilience účastníků výzkumu a adaptace na extrémní události byla určena hierarchickou trsovou ana-lýzou. Získaná data byla popsána základními popisnými statistikami. Rozdíly mezi skupina-mi ve středních hodnotách byly zjištěny Studen-tovým t-testem.Výsledky. Byly vyčleněny čtyři typy resilience osobnosti vůči bojovým stresorům: „Ti, kdo predikovali nebezpečí“ (68,38 %), „Ti, kdo byli otevřeni nebezpečí“ (21,37 %), „Ti, kdo se identifikovali s rolí oběti“ (6,83 %), a „Ti, kdo skryli svůj strach“ (3,42 %). Výsledky ukázaly, že sebeidentifikace osoby se symptomy akutní stresové poruchy ovlivňuje prvky realizace ná-razníkové role úzkosti.Omezení studie. Závěry o nárazníkové roli úz-kosti pro utváření PTSD vyžadují objasnění a další výzkumy.
Photosynthetic responses of potato (Solanum tuberosum L. cv. Chunzao) were examined during potato virus Y (PVYNTN) infection. PVYNTN infection significantly reduced net photosynthetic rate and stomatal conductance, but had little influence on intercellular CO2 concentration. As the disease developed, the maximum carboxylation velocity of ribulose-1,5-bisphosphate carboxylase/oxygenase and the maximum electron transport rate contributing to ribulose-1,5-bisphosphate regeneration gradually decreased, followed by substantial reductions in the relative quantum efficiency of photosystem 2 (PS2) electron transport, the efficiency of excitation energy capture by open PS2 reaction centres, and photochemical quenching, but not in sustained photoinhibition. Thus PVYNTN depressed photosynthesis mainly by interfering with the enzymatic processes in the Calvin cycle which resulted in a down-regulation of electron transport. and Y. H. Zhou ... [et al.].
Vojtěch Bartoš, Michal Bauer, Julie Chytilová, Ian Levely., Obsahuje bibliografii a bibliografické odkazy, Anglické resumé, and On-line verze: Appendix v rozsahu str. 41-62.
Potato tubers, Solanum tuberosum L. cv. Bintje were stored at 4 or 20 °C. A segment of parenchyma with a bud was cultívated in vitro, in order to study the growth of plantlets according to the storage temperature and the atmosphere composition in vessels. The conservation temperature had no effect on the shoot length, the leaf area and the leaf number. On the other hand, the atmosphere composition in vessels modifíed the morphology. The plantlets cultívated in non-sealed vessels were more developed than the plantlets cultívated in hermetically dosed tubes. The photosynthetic potentíals were 4.7 times higher for the plantlets coming from the tubers stored at 20 °C than for the plantlets coming from the tubers stored at 4 °C. These potentíals were 1.7 times higher when the plantlets were cultívated in non- hermetícally dosed tubes than in hermetically dosed ones. So a conservation of tubers at 20 °C and a culture in non-enclosed vessels seemed to be the suitable conditions for the micropropagation of potatoes in viiro. Moreover, this culture type could improve the acdimatízatíon.
A study on the effects of prescribed burning on rodent community ecology was conducted in Serengeti National Park, Tanzania. The study aimed at generating ecological knowledge about the changes in rodent communities when areas of the park are intentionally burned to regulate grasslands or reduce undergrowth that can lead to uncontrolled forest fires. A completely randomized design (CRD) factorial layout with two treatments (burned and unburned) and two replications was applied. A total of 148 animals comprising six species of rodent and one insectivore were captured over 2,940 trap nights. Among the trapped individuals, 41.9% were adults, 16.1% juveniles and 41.9% sub-adults. Males and females were at parity between treatments. Species abundance was estimated using the minimum number alive (MNA) method for different rodent species and was found to vary with treatment where Mastomys natalensis declined in burned plots whilst Arvicanthis niloticus increased. However, species diversity did not differ across treatments (F1, 10 = 0.15, p = 0.70). Differences in the reproductive condition of female M. natalensis (z = 4.408, df = 15, p < 0.001) and A. niloticus (z = 2.381, df = 15, p = 0.017) were observed between treatments showing that higher numbers of reproductively active females were observed in burned plots in March, whilst in unburned plots more were observed from November to February. Conservation strategies involving periodic habitat burning should, therefore, consider small mammal reproductive periods to ensure that species potentially at risk are not adversely affected and able to rapidly recover from the effects of burning in temporarily lowering food resources and longer term impacts of increased predation caused by reduced cover.
Activity of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO) in heated crude extracts from seedlings of the rice cultivars Hitomebore and IR28 was investigated in the presence of proline and betaine. Both solutes retarded the inactivation of the enzyme extracted from the leaves of both cultivars at temperature-stress from 35 to 45 °C. At 50 °C, however, betaine was effective in both cultivars. Stabilization of RuBPCO activity was independent of the added solute from 1 to 2 M concentration. and M. L. Dionisio-Sese, M. Shono, S. Tobita.
The purpose of this study was to compare the effects of shortterm fasting-induced rapid weight loss with those of slower but equivalent body weight loss induced by daily calorie restriction on muscle protein degradation pathways and muscle protein content. Male Fischer rats were subjected to either 30 % calorie restriction for 2 weeks to slowly decrease body weight (Slow) or 3-day fasting to rapidly decrease body weight by a comparable level of that of the Slow group (Rapid). The final body weights were about 15 % lower in both the Slow and Rapid groups than in the Con group (p<0.001). The total protein content and wet weight of fast-twitch plantaris muscle, but not slow-twitch soleus muscle, were significantly lower in the Rapid group compared with the control rats fed ad libitum. Substantial increases in the expression ratio of autophagosomal membrane proteins (LC3-II/-I ratio) and polyubiquitinated protein concentration, used as biomarkers of autophagy-lysosome and ubiquitinproteasome activities, respectively, were observed in the
plantaris muscle of the Rapid group. Moreover, the LC3-II/-I ratio
and polyubiquitinated protein concentration were negatively correlated with the total protein content and wet weight of plantaris muscle. These results suggest that short-term fastinginduced rapid body weight loss activates autophagy-lysosome and ubiquitin-proteasome systems more strongly than calorie restriction-induced slower weight reduction, resulting in muscular atrophy in fast-twitch muscle.
Water deficit, when rapidly imposed on three C4 grasses of the different metabolic subtypes, Paspalum dilatatum Poiret (NADP-malic enzyme), Cynodon dactylon (L.) Pers (NAD-malic enzyme) and Zoysia japonica Steudel (phosphoenolpyruvate carboxykinase), caused decreases in photosynthetic rates, in the quantum yield of PS II and photochemical quenching, and in the activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC). The results provide evidence for non-stomatal limitations of photosynthesis differing in nature between the three species. and A. S. Soares-Cordeiro ... [et al.].
The purpose of this study was to examine how oxygen uptake (V.o2) in decrement-load exercise (DLE) is affected by changing rate of decrease in power output. DLE was performed at three different rates of decrease in power output (10, 20 and 30 watts ・min-1: DLE10, DLE20 and DLE30, respectively) from power output corresponding to 90 % of peak V.o2. V.o2 exponentially increased and then decreased, and the rate of its decrease was reduced at low power output. The values of V.o2 in the three DLE tests were not different for the first 2 min despite the difference in power output. The relationship between V.o2 and power output below 50 watts was obtained as a slope to estimate excessive V.o2 (ex-V.o2) above 50 watts. The slopes were 10.0±0.9 for DLE10, 9.9±0.7 for DLE20 and 10.2±1.0 ml ・min-1 ・ watt-1 for DLE30. The difference between V.o2 estimated from the slope and measured V.o2 was defined as ex-V.o2. The peak value of ex-V.o2 for DLE10 (189±116 ml ・min-1) was significantly greater than those for DLE20 and for DLE30 (93±97 and 88±34 ml ・min-1). The difference between V.o2 in DLE and that in incremental-load exercise (ILE) below 50 watts (ΔV.o2) was greater in DLE 30 and smallest in DLE10. There were significant differences in ΔV.o2 among the three DLE tests. The values of ΔV.o2 at 30 watts were 283±152 for DLE10, 413±136 for DLE20 and 483±187 ml ・min-1 for DLE30. Thus, a faster rate of decrease in power output resulted in no change of V.o2 at the onset of DLE, smaller ex-V.o2 and greater ΔV.o2. These results suggest that V.o2 is disposed in parallel in each motor unit released from power output or recruited in DLE., T. Yano, T. Yunoki, R. Matsuura, T. Arimitsu, T. Kimura., and Obsahuje bibliografii a bibliografické odkazy