In tropical regions, high light levels can lead to increased photooxidative damage in plants. Thus, reducing solar radiation could have a substantial impact on crop performance. This study aimed evaluate the physiological responses and metabolic profile of two tomato varieties grown microenvironments modified with cover meshes under level warm climate. The experiment was achieved irradiance an ...

The rate of oxygen utilization by the electron transport system at low oxygen concentrations has been difficult to explain mechanistically (l-3). As in most enzymatic reactions the rate of oxygen utiliiation is independent of oxygen concentration when the oxygen concentration is high, but becomes dependent upon the oxygen concentration at some critical value of the oxygen tension. Chance (4) ha...

The rate of oxygen utilization by the electron transport system at low oxygen concentrations has been difficult to explain mechanistically (l-3). As in most enzymatic reactions the rate of oxygen utiliiation is independent of oxygen concentration when the oxygen concentration is high, but becomes dependent upon the oxygen concentration at some critical value of the oxygen tension. Chance (4) ha...

ABSTRACT Background: accurate methods of radiation therapy dose calculation. There are different Monte Carlo codesfor simulation of photons, electrons and the coupled transport of electrons and photons. MCNPis a general purpose Monte Carlo code that can be used for electron, photon and coupledphoton-electron transport.Monte Carlo simulation of radiation transport is considered to be one of the ...

BACKGROUND Etravirine (ETR; also known as TMC125) is a new nonnucleoside reverse-transcriptase inhibitor with activity against wild-type and nonnucleoside reverse-transcriptase inhibitor-resistant human immunodeficiency virus type 1 (HIV-1). METHODS This randomized, phase IIb, placebo-controlled, 2-stage, dose-escalating trial evaluated the safety, tolerability, and preliminary efficacy of 3 ...

The present study tests the hypothesis that endurance exercise training (ETr) reverses age-associated alterations in expression of Na+-K+-ATPase subunit isoforms in rat skeletal muscles. Expression of the isoforms was examined in 16-mo-old sedentary middle-aged, 29-mo-old sedentary senescent, and 29-mo-old treadmill exercise-trained senescent Fischer 344 x Brown Norway rats. Levels of the alpha...

Results Overall, the patients were 81% male, 85% Caucasian, with a median age of 36 years. Median baseline CD4 Count was 302 cells/uL, median HIV RNA 4.8 log10 copies/mL. In the primary analysis, 13/79 patients (16.5%) in the ETR arm, versus 36/78 (46.2%) in the EFV arm, showed at least one Grade 1-4 treatmentemergent drug-related NPS AE (p<0.001). The most common nervous system was dizziness, ...

The Brazilian Atlantic Forest is a typically multi-layer tropical forest, while cerrado (savanna) is a patchy habitat with different physiognomy. Despite these differences, both habitats have high light heterogeneity. Functional traits of Dalbergia nigra and D. miscolobium from the Atlantic Forest and cerrado, respectively, were evaluated under shade (25% of full sunlight) and full sunlight in ...

Multi-wavelength chlorophyll fluorescence analysis was utilised to examine the photosynthetic efficiency of the biofuel-producing alga Nannochloropsis oculata, grown under two light regimes; low (LL) and high (HL) irradiance levels. Wavelength dependency was evident in the functional absorption cross-section of Photosystem II (σII(λ)), absolute electron transfer rates (ETR(II)), and non-photoch...

arrangement of the redox components in the membrane as random rather than chain-like and they raise the question of the role of lateral diffusion in the mechanism of electron transport. We report here the rates of lateral diffusion for the major inner membrane redox components as determined by fluorescence recovery after photo-bleaching (Table 1, column I). Based on the diffusion coefficients e...