During hydrological research in a Chilean swamp forest, we noted a pattern of higher streamflows close to midday and lower ones close to midnight, the opposite of an evapotranspiration (Et)-driven cycle. We analyzed this diurnal streamflow signal (DSS), which appeared mid-spring (in the growing season). The end of this DSS coincided with a sustained rain event in autumn, which deeply affected stream and meteorological variables. A survey along the stream revealed that the DSS maximum and minimum values appeared 6 and 4 hours earlier, respectively, at headwaters located in the mountain forests/ plantations than at the control point in the swamp forest. Et in the swamp forest was higher in the morning and in the late afternoon, but this process could not influence the groundwater stage. Trees in the mountain headwaters reached their maximum Ets in the early morning and/or close to midday. Our results suggest that the DSS is a wave that moves from forests high in the mountains towards lowland areas, where Et is decoupled from the DSS. This signal delay seems to convert the link between streamflow and Et in an apparent, but spurious positive relationship. It also highlights the role of landscape heterogeneity in shaping hydrological processes.
Determination of malondialdehyde is a widely used procedure for measurement of lipid peroxidation. In this paper we report an unusual temperature dependence of malondialdehyde formation in egg yolk phosphatidylcholine liposomes oxidized by the Fenton system (0.1 mmol/1 FeSC>4 and 0.05 mmol/1 H2O2). The amount of malondialdehyde formed was 37 % higher in samples kept at 22 °C than at 50 °C. An alternative method for determination of lipid peroxidation, measurement of oxygen uptake, revealed complete consumption of dissolved oxygen to peroxidized lipids at 22 °C as well as 50 °C. Since oxygen is essential for the formation of cyclic peroxides - precursors of malondialdehyde - we conclude that the nature of the observed effect consists in limitation of oxygen availability at elevated temperatures.
The hormone leptin, which is thought to be primarily produced by adipose tissue, is a polypeptide that was initially characterized by its ability to regulate food intake and energy metabolism. Leptin appears to signal the status of body energy stores to the brain, resulting in the regulation of food intake and whole-body energy expenditure. Subsequently, it was recognized as a cytokine with a wide range of peripheral actions and is involved in the regulation of a number of physiological systems including reproduction. In the fed state, leptin circulates in the plasma in proportion to body adiposity in all species studied to date. However other factors such as sex, age, body mass index (BMI), sex steroids and pregnancy may also affect leptin levels in plasma. In pregnant mice and humans, the placenta is also a major site of leptin expression. Leptin circulates in biological fluids both as free protein and in a form that is bound to the soluble isoform of its receptor or other binding proteins such as one of the immunoglobulin superfamily members Siglec-6 (OBBP1). Although the actions of leptin in the control of reproductive function are thought to be exerted mainly via the hypothalamicpituitary-gonadal axis, there have also been reports of local direct effects of leptin at the peripheral level, however, these data appear contradictory. Therefore, there is a need to summarize the current status of research outcomes and analyze the possible reasons for differing results and thus provide researchers with new insight in designing experiments to investigate leptin effect on reproduction. Most importantly, our recent experimental data suggesting that reproductive performance is improved by decreasing concentrations of peripheral leptin was unexpected and cannot be explained by hypotheses drawn from the experiments of excessive exogenous leptin administration to normal animals or ob/ob mice., M. Herrid, S. K. A. Palanisamy, U. A. Ciller, R. Fan, P. Moens, N. A. Smart, J. R. McFarlane., and Obsahuje bibliografii
The goal of the present study is to understand the discoursive negotiation of the claims upon the use of public space. Specifically is to focused on the analysis of purification of public space from homeless persons in middle-sized city. On the basis of my research of homeless persons that included de semi-structured interviews with selected actors (policemen, politicians, employees of social services and of the non-profit organizations), analysis of documents (especially journalistic and legal) and active participant observation.
V těhotenství je anafylaktická reakce naštěstí sice relativně vzácná, její důsledky ale mohou vést až k závažnému postižení matky i plodu. Ve většině publikovaných případů těžké anafylaxe v těhotenství bylo těžké postižení dokonce spíše na straně plodu než matky. Vznik anafylaxe se většinou nedá předvídat, první symptomy jsou někdy netypické, pouze lokální, ale rychle mohou přecházet v generalizované postižení celého organismu. Ať už jsou zprostředkovány protilátkami typu IgE (pravá anafylaxe), nebo vznikají na jiném podkladě (anafylaktoidní reakce), klinický obraz bývá obdobný. Je třeba myslet na to, že i klinicky nenápadné počáteční symptomy mohou mít průběh závažný a život ohrožující. Každé opomenutí a prodleva v diagnostice a léčbě anafylaxe může vést k fatálnímu konci. O úspěšném výsledku léčby rozhoduje velkou měrou medicínská zkušenost a včasnost zásahu. Protože je toto téma v současné literatuře zmiňováno spíše jen výjimečně, je cílem tohoto článku shrnout problematiku anafylaxe v těhotenství z hlediska patofyziologie, klinického průběhu, diagnostiky i léčby., Anaphylaxis in pregnancy is a relatively rare reaction but it can lead to serious maternal and fetal impairment. In published cases of severe anaphylaxis in pregnancy there were even more severe disabilities in the fetus than the mother. Development of anaphylaxis is usually unpredictable, the first symptoms are sometimes atypical and only local, but can move quickly in a generalized impairment of the whole organism. Whatever they are mediated by IgE antibodies (right anaphylaxis), or are caused on another basis (anaphylactoid reactions), the clinical picture is similar. It should be kept in mind that even clinically inconspicuous initial symptoms may progress into serious and life-threatening state. Any omission and delay in diagnosis and treatment of anaphylaxis can lead to fatal end. A successful outcome is largely dependent on experience and timeliness of medical intervention. Because this topic is mentioned in contemporary literature rather rarely, this review therefore summarizes the issue of anaphylaxis in pregnancy in terms of pathophysiology, clinical course, diagnosis and treatment., Jan Bláha, Pavlína Nosková, Kateřina Bláhová, Ivana Kolníková, and Literatura 56
Východiska: Metody léčby klasické trigeminální neuralgie (cTN) isou rozličné stejně jako jejich patofyziologie. Pacienti s cTN, u kterých nebyla medikamentózni léčba účinná nebo vyvolala nežádoucí Účinky, jsou kandidáty chirurgické léčby. 07; Prezentace výsledků léčby 1775 pacientů s cTN léčených perkutánní radiofrekvenční rizotomií (pRFR). Je rovněž diskutován současný stav chirurgické léčby cTN. Metodika: V období od 1983 do 2001 bylo v Neurochirurgickém ústavu v Bělehradě metodou pRFR léčeno 1775 pacientů s onemocněním cTN. Autoři analyzovali inidální a dlouhodobě výsledky, tr jako např. vliv rozličných typů cTN, dosažení faciální hypestezie po pRFR a předchozích chirurgických procedur v trigeminové oblasti na výsledky léčení. Výsledky: Dobrých iniciálních výsledků bylo docíleno u 96 % pacientů; recidivita po 5 letech se objevila u 21 % pacientů. Výsledky byly úspěšnější U pacientů, kteří prodělali krátkodobou, epizodickou, ostrou bolest v porovnání s těmi, jejichž bolesti zahrnovaly i složku stálé, tupé bolesti. Úvodní stupeň a doba trvání faciální hypestezie vyvolané pRFR nejen zvýšila úspěšnost ve zmírnění bolesti, ale také tíži neurologických komplikací. Závěr: pRFR nebo operace gamma nožem jsou doporučovány jako metody první volby v rámci chirurgické léčby pacientů s cTN. Mikrovaskulámí dekomprese by měla být zvážena u mladších pacientů s jednoznačnou neuroradiologickou diagnózou neurovaskulámí komprese v oblasti trigeminal root entry zone, nebo po selhání peí perkutánních neurochirurgických procedur., Background: Treatment of classic trigeminal neuralgia (cTN) has been as diverse as explanations of its pathophysiology. The patients with cTN refractory to medical treatment are candidates for surgical procedures. Aims: We report our results on 1775 patients treated for cTN with percutaneous radiofrequency rhizotomy (pRFR). We also discuss the current state of surgical management of cTN. Methods: In the period from 1983 to 2001, 1775 patients underwent pRFR for relief of cTN at the Institute of Neurosurgery in Belgrade. The authors analyzed the initial results and long-term follow- up data, such as the influence of different types of cTN, achieved facial hypesthesia after pRFR and prior trigeminal surgical procedures on the treatment outcome. Results: Initial positive results were obtained in 96% of the patients, while the recurrence rate after five years accounted for 21%, taking into consideration the whole series. Better results were achieved in patients with short episodic, sharp pain than in patients suffering from pain containing a more constant, throbbing component. Unfortunately, the initial degree and duration of facial hypesthesia provoked by pRFR, not only increased the success in pain relief, but also the degree of neurological complications. Conclusion: We recommend pRFR or gamma knife surgery (GK) as the first procedure for surgical treatment in majority of patients suffering from cTN. Microvascular decompression (MVD) should be considered for younger patients with clear radiological diagnosis of neurovascular compression at the trigeminal root entry zone or after failed percutaneous neurolytic procedures., Eugen Slavík, D. Radulović, and Lit. 36
Clinical oncologists have been focusing their efforts on attempting to define risk groups of patients with unusual biological reactions to the recommended therapy regimens using molecular biology techniques. The aims of our study were: (i) to find a design and validate a method for fast and reliable analysis of the D1853N (5557G>A) genetic polymorphism in the ATM (ataxia-telangiectasia mutated) gene; (ii) to use side-directed mutagenesis to generate ATM 5557A-positive DNA (reference ATM5557A DNA); and (iii) to analyze a group of patients suffering from cervical carcinoma with adverse responses to radiotherapy. The 5557A variant was found in three of twenty women (15%). Our data show that the prevalence of the 5557A allelic variant in cervical cancer subjects with adverse responses after irradiation probably does not differ from the prevalence common in Caucasians. A larger population study should confirm these preliminary results., Martin Beránek, Monika Drastíková, Simona Paulíková, Igor Sirák, Milan Vošmik, Jiří Petera, and Literatura 31