We study the structure and evolution of “quasistars,” accreting black holes embedded within massive hydrostatic gaseous envelopes. These configurations may model the early growth of supermassive black hole seeds. The accretion rate onto the black hole adjusts so that the luminosity carried by the convective envelope equals the Eddington limit for the total mass, M∗ + MBH ≈ M∗. This greatly exce...

A photocatalytic reactor with UV/TiO2 was used for the posttreatment of olive mill wastewater after anaerobic digestion. A factorial experimental design was adopted to determine the statistical significance of each parameter tested, namely, initial chemical oxygen demand (COD), pH, treatment time and recirculation flow and possible interactions in three response variables: phenols, color and CO...

This study evaluated the effects of acidic medicines (Dimetapp and Claritin), under pH-cycling conditions, on the surface degradation of four composite resins (microhybrid: TPH, Concept, Opallis and Nanofilled: Supreme). Thirty disc-shaped specimens ([symbol: see text] = 5.0 mm/thickness = 2.0 mm) of each composite were randomly assigned to 3 groups (n = 10): a control and two experimental grou...

Stormwater pollution is a major cause of water quality impairment. Much the existing gray stormwater infrastructures provide little or no treatment, especially for dissolved pollutants. Due to capital cost installing new infrastructure, retrofitting promising alternative reduce pollution. In this study, aluminum-based drinking treatment residuals (WTR), byproduct from was combined with other co...

Background: Water plays an essential role in supporting life on earth and sea worldwide, requiringclean, safe, high quality and sustainable resources. Nowadays, many water resources have been contaminatedwith toxic compounds originating from petroleumdue to economical and industrial developments. There is anurgent need to clean up the waters with environmentally friendlyand inexpensive methods...

STUDY OBJECTIVES To test the hypothesis that gastric pH would be elevated above pH 3.0 for at least 2 hours after administration of chewable, dispersible, buffered didanosine tablets. Doses tested were 200 mg (two 100-mg tablets) and 400 mg (two 200-mg tablets). We also sought to compare these doses with regard to maximum gastric pH (pHmax), time to pHmax (TpH-max), time that gastric pH exceeds...

Increased platelet serotonin level (PSL) has been consistently found in a portion of autistic patients. Suggested mechanisms for hyperserotonemia in autism have been increased synthesis of serotonin (5HT) by tryptophan hydroxylase (TPH), increased uptake into platelets through 5HT transporter (5HTt), diminished release from platelets through 5HT2A receptor (5HT2Ar) and decreased metabolism by m...