2005 po suicidálním pokusu byl zaslán anonymní katamnestický dotazník, zaměřený na psychosociální adaptaci, psychopatologické projevy včetně suicidálního jednání. Návratnost činila 29 %, resp. 38 % ze všech dosažitelných. 23 % souboru je nezaměstnaných. 68 % mělo někdy přání být mrtvý nebo ublížit si, 36 % si dělalo plány na suicidium, 18 % se opět o ně pokusilo, jeden respondent opakovaně. U 41 % se vyskytovalo sebepoškozování, u 36 % bylo užití drog v posledním roce, 27 % pije vícekrát týdně alkohol, 73 % kouří cigarety. Pouze menšina (36 %) byla po propuštění v psychiatrické péči, i když tato byla doporučena ve všech případech. Uváděné obtíže svědčí o trvajícím suicidálním riziku., Anonymous catamnestic questionnaire, focused on psychosocial adaptation and psychopathological symptoms including suicide behaviour was sent to 77 patients hospitalized in 2004-2005 after a suicide attempt. Return of the questionnaire was 29 %, precisely 38% of those within reach. 23 % of the sample are unemployed. 68 % have sometimes wished to be dead or to hurt themselves, 36 % have made suicide plans, 18 % repeated suicide attempt, one respondent repeatedly. In 41 % self-harm occurred, 36 % have taken drugs in the course of last year. 27 % drink alcohol more than once a week and 73 % smoke cigarettes. Even though a psychiatric follow-up had been recommended to every patient discharged from the clinic, only a minority of them (36 %) underwent it. To conclude, the reported problems indicate a persistent suicide risk., Jiří Koutek, Jana Kocourková., and Obsahuje seznam literatury
We hypothesized that hypertension-related myocardial remodeling characterized by hypertrophy and fibrosis might be accompanied by cell-to-cell gap junction alterations that may account for increased arrhythmogenesis. Intercellular junctions and expression of gap junction protein connexin-43 were analyzed in rat heart tissues from both spontaneous (SHR) and L-NAME model of hypertension. Isolated heart preparation was used to examine susceptibility of the heart to lethal ventricular fibrillation induced by low potassium perfusion. Ultrastructure observation revealed enhanced neoformation of side-to-side type while internalization of end-to-end type (intercalated disc-related) of gap junctions prevailed in the myocardium of rats suffering from either spontaneous or L-NAME-induced hypertension. In parallel, immunolabeling showed increased number of connexin-43 positive gap junctions in lateral cell membrane surfaces, particularly in SHR. Besides, focal loss of immunopositive signal was observed more frequently in hearts of rats treated with L-NAME. There was a significantly higher incidence of hypokalemia-induced ventricular fibrillation in hypertensive compared to normotensive rat hearts. We conclude that adaptation of the heart to hypertension-induced mechanical overload results in maladaptive gap junction remodeling that consequently promotes development of fatal arrhythmias., M. Fialová, K. Dlugošová, L. Okrouhlicová, F. Kristek, M. Manoach, N. Tribulová., and Obsahuje bibliografii a biblioigrafické údaje
Prosopis juliflora is an invasive leguminous tree species growing profusely under wide environmental conditions. Primary objective of this study was to investigate adaptation strategies evolved to deal with wide environmental conditions during different seasons. P. juliflora adapts through a production of leaves in two seasons, namely, the spring (the first cohort) and monsoon (the second cohort) with differing but optimal physiological characteristics for growth in respective seasons. Our studies show that the first cohort of leaves exhibit maximum carbon fixation under moderate temperatures and a wide range of PPFD. However, these leaves are sensitive to high leaf-to-air-vapor pressure deficit (VPD) occurring at high temperatures in summer resulting in senescence. While the second cohort of leaves produced during monsoon showed maximum carbon fixation at high irradiance and temperatures with low VPD, it is sensitive to low temperatures causing senescence in winter., P. A. Shirke, U. V. Pathre, P. V. Sane., and Obsahuje bibliografické odkazy
Cuttings of Populus cathayana Rehd, originating from three triploid and one diploid populations with the same parents but different gamete origins, were used to examine physiological responses to drought stress and rewatering by exposure to three progressive water regimes. Progressive drought stress significantly decreased the leaf relative water content (RWC), photosynthesis, and chlorophyll fluorescence parameters, and increased the relative electrolyte leakage, malondialdehyde (MDA), free proline (Pro), and antioxidant enzymes, such as superoxide dismutase, peroxidase, and catalase, in the four populations evaluated. However, compared to the diploid population, triploid populations showed lower relative electrolyte leakage and MDA, higher RWC and Pro content, and more efficient photosynthesis and antioxidant systems under the same water regime. Our data indicated that triploid populations possessed more efficient protective mechanisms than that of diploid population with gradually increasing drought stress. Moreover, some triploid genotypes were less tolerant to water stress than that of diploids due to large intrapopulation overlap., T. Liao, Y. Wang, C. P. Xu, Y. Li, X. Y. Kang., and Obsahuje bibliografii
Analysis of the contents and organization of pigments in leaves of more than 60 plant species from different natural habitats revealed that the majority of plants from extreme regions had a low pigment content. The arctic plants contained 40-60 % less chlorophyll (Chl) than the same species in the temperate zone. The desert plants had an extremely low pigment content. Owing to high amount of total carotenoids (Car), the arctic and high montane plants had the lowest ratios Chl/Car. The part of Chl belonging to light-harvesting (LH)-antenna varied less than the total amounts. The majority of investigated arctic plants had a smaller amount of Chl and larger part of it in the LH-antenna than plants of the temperate zone. The pigment apparatus of high montane plants was distinguished by very high Car content probably serving as protectant against photodamage: in their photosystems 1 and 2 there was 4-5 times more p-carotene than in the plants of other zones.