Five patients with dominant retinitis pigmentosa who were monocularly entrained to a 14 hr light: 10 hr dark cycle showed an abnormal diurnal rhythm in the rod electroretinogram of the entrained eye. These patients as a group showed larger-than-normal reductions in b-wave sensitivity 1.5 hr and 8 hr after light onset relative to other times of day. The findings raise the possibility that these ...

surface ozone (surface o3)is a secondary pollutant and there are only limited studies on ozone in south india. studies have revealed a strong correlation between higher ozone levels and warmer days. surface o3 along with its precursors like no2, co and ch4 are being measured at kanyakumari (8.0780° n, 77.5410° e), tamilnadu, india and in this paper we present the summer time variation of ozone ...

While wetlands are the largest natural source of methane (CH4) to atmosphere, they represent a large uncertainty in global CH4 budget due complex biogeochemical controls on dynamics. Here we present, our knowledge, first multi-site synthesis how predictors fluxes (FCH4) freshwater vary across wetland types at diel, multiday (synoptic), and seasonal time scales. We used several statistical appro...

the seasonal and diurnal variations in the incidence of hypertension, cerebrovascular accident, coronary heart disease were well documented, but the relation between season and daytime on the onset of aneurysmal subarachnoid hemorrhage (asah) was a subject of controversy. in the present study we aimed to evaluate the role of season of year and diurnal changes on the onset of asah. the time was ...

Theoretical calculations of the ionospheric lower transition height (LTH), a level of equal O and molecular ion densities, were performed and compared with empirical models by Zhang et al. (1996). This paper represents a substantial extension of the prior work by including the AE-C data of ion composition analysis and by detailed quantitative studies of the LTH simulation, and by creating a new...