A method of simultaneous recording of the intensity changes in several delayed luminescence (DL) components was ušed to study the effects of HgCl2 on electron transport reaction in intact algal cells. At a low concentration (1 pM), the reagent partially inhibited the electron transport between the acceptors and Qg of photosystem 2 (PS 2), whereas at high concentrations (100 pM) the reagent affected mainly the donor side of PS 2.
Tento článek vznikl na vyzvání redakce jako reakce na článek prof. Šindeláře Úhly a jejich aplikace [1]. Jakožto expert v příslušných mezinárodních komisích bych ovšem měl postupovat "jednoduše", totiž konstatovat, že článek neodpovídá normám, a případně rozebrat, v čem neodpovídá a jaký je výklad z hlediska norem. V tom by ale nebylo pro čtenáře mnoho nového. Přijměte proto prosím tento článek spíše jako vyjádření teoretického fyzika a dlouholetého pedagoga na MFF UK. and Jan Obdržálek.
We report the findings of a longitudinal observational study on HIV-infected patients grouped by presumed transmission group, who had diarrhoea. The purpose of this study was to assess the prevalence of and factors associated with Cryptosporidium infection on these patients. Modified formol-ether concentration followed by modified Ziehl-Neelsen and phenol-auraminc/carbol-fuchsin staining techniques were used to identify Cryptosporidium from 465 patients. Cryptosporidiosis was reported in 36/465 (8% and 95% confidence interval 6, 10) patients. Of the positive patients 30 (83%) were men and 6 (17%) women. Prevalence of infection was higher among HIV-seropositive patients whose exposure category was through sexual contact (69%) than among patients in other HIV exposure categories (9%, Standard Z test, P < 0.001). Median CD4+ cell count/mm3 was 120 (range 3-600). Besides diarrhoea, the main clinical manifestations were fever and weight loss in 14 (39%) and 26 (72%) patients, respectively. Cryptosporidium infection was considered to be the first AIDS defining disease in 31% of the patients followed by tuberculosis in 19%, Pneumocystis carinii pneumonia in 14%, Salmonella sepsis in 6%, isosporiasis in 3%, toxoplasmic encephalitis in 3%, leishmaniasis in 3% and Kaposi’s sarcoma in 3% of the patients. There was no significant difference (P = 0.82) in survival times for those given folate antagonists to treat other opportunistic infections. The decrease in prevalence of cryptosporidiosis observed from 1994 until May 1997 is not statistically significant (P = 0.11). Most cases of cryptosporidial infection in AIDS patients in Lisbon occurred in those whose HIV infection was assumed to have been acquired by the sexual route (hetero-, homo- and bisexual), with few cases occurring in drug-abusers.
Thls paper Is devoted to the solar Hα-flare and cm-burst on
July 12,1982. It Is shown scenarlo of the flare-burst development: the
change of magnetlc fleld - Hα-flare - the burst of the radlo emission
intensity.
V práci je řešen jeden z možných způsobů určení materiálových konstant tenké desky, a to pro případ kruhové desky na okraji upnuté. Byly odvozeny vztahy, které umožňují bezdotykovým způsobem určit Poissonovo číslo a modul pružnosti v tahu materiálu desky. V případě, že je materiál desky průhledný (např. kapalinové čočky), jsou uvedeny vztahy pro výpočet indexu lomu a Abbeova čísla tohoto materiálu.