In contrast, paraquat treatment effects were not due to a target-

In contrast, paraquat treatment effects were not due to a target-specific action on those dark and light reactions. Paraquat also induced a marked surge in the

total absorption of photosystem II (PSII) antenna chlorophyll per active RC displaying selleck products a large increase of the dissipation of excess energy through non-photochemical pathways (thermal dissipation processes). Flazasulfuron induced a slight decrease of both the total driving force for photosynthesis and the quantum yield of electron transport beyond Q(A)(-) combined to a small but significant increase of the non-photochemical energy dissipation per RC (DI(0)/RC). We conclude that energy fluxes and driving force for photosynthesis generate useful information about the behaviour of aquatic plant photosystems helping to localize different target sites and to distinguish heterogeneities inside the PSII complexes. Regardless of the active molecule tested, the DF(ABS), phi(E0), DI(0)/RC and/or ET(0)/RC parameters indicated a significant variation compared to control while phi(P0) (F(V)/F(M)) showed no significant

inhibition suggesting that those parameters are more sensitive for identifying a plant’s energy-use efficiency than the maximum quantum yield of primary PS II photochemistry alone. (C) 2008 Elsevier B.V. All rights reserved.”
“Subclinical selleck chemical rhythmic electrographic discharge of adults (SREDA) CA4P purchase is the rarest benign epileptiform variant.

It is an established EEG phenomenon that when present may cause confusion with an epileptic discharge for those unfamiliar with the entity. An electronic term search was performed on all EEG reports to identify those records reported as showing SREDA and other benign variants. Serial EEG reports of 5,200 subjects who underwent EEG through our EEG laboratory services between January 2001 and December 2009 were thus scrutinized, and their clinical profile and follow-up data were obtained. A total of four subjects had SREDA (0.07%) in their EEG, and their mean age was 53.7 years. The duration of SREDA ranged from 10 to 60 seconds. SREDA was not associated with any clinical seizures during recording. Two patients remained asymptomatic on long-term follow-up. One patient was found to have idiopathic generalized epilepsy and another patient had Alzheimer disease during the follow-up. Mere presence of SREDA may not have any clinical significance at one point of time. The authors have also highlighted the possible pathophysiological basis of SREDA.

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