Acute rejection of a transplanted organ is characterized by intense inflammation within the graft. Yet, for many years transplant researchers have overlooked the role of classic mediators of inflammation such as prostaglandins and thromboxane (prostanoids) in alloimmune responses. It has been demonstrated that local production of prostanoids within the allograft is increased during an episode o...

Silver-impregnated membrane was facilely prepared by ex situ silver nanoparticles (NPs) blending method using polyethersulfone (PES) as the base polymer. A total of three membranes [F1(S0), F2(S0.5) and F3(S2.0)] were fabricated at different weight percentages of polymer and silver (Ag) loadings to compare their effects on membrane morphological and performance properties. All membrane types we...

We study the impact of induced pressure fields on water flow and salt rejection in nanopores produced MoS2 membranes. observe that permeability are not impacted by distance between pores. This result contradicts continuous fluid mechanics calculations microfilters, which indicates existence hydrodynamic interactions adjacent pores increase mobility. Our results suggest at this nanoscale, do aff...

The aim of this study was to evaluate the changes in membrane surface properties and solute separation by a nanofiltration membrane during repetitive membrane fouling and chemical cleaning. Secondary treated effluent and model fouling solutions containing humic acids, sodium alginate, or silica colloids were used to simulate membrane fouling. Chemical cleaning was carried out using a commercial...

Free-volume hole-radii of the active skin layer of one seawater and two low pressure reverse osmosis (RO) membranes namely SWC5, ESPAB, and ESPA2 respectively were evaluated using positron annihilation lifetime spectroscopy (PALS) with a slow positron beam. The results were related to the rejection of boric acid and eight N-nitrosamines to provide insights to the transport of these small solute...

In this research, the membranes were stemmed from biopolymer containing quaternary amine moieties (Chitosan and Chitosan-palm) for nanofiltration purposes. The developed fully featured using different characterization techniques (SEM), (TGA), zeta potential, contact angle measurement. membrane’s features systematically characterized in hydrophilicity angle, surface morphology, charge on surface...

In the framework of understanding the transport mechanism that governs the filtration of NO3- solution through a γ-Al2O3 membrane with a nominal pore size of 5 nm at low ultrafiltration, a series of various types of nitrate solutions and operating conditions were investigated. The effect of filtration parameters such as pH, applied pressure and NO3- concentration on the selectivity and permeabi...

photocatalytic membranes exhibit great potential for water treatment since they combine the filtration and photo degradation in a single unit. although blending photocatalytic nanoparticles into polymeric thin film remains the simplest method to prepare the photocatalytic membrane, the entrapped photocatalyst showed less catalytic activity due to the agglomeration and shielding effects in the p...

textile wastewaters due to the toxic effects of dyestuffs and other organic compounds and their stability toward light and oxidizing agents have led to an environmental problem. several treatment methods for dye removal have been investigated. membrane process is one of the simplest and most effective methods for dye removal from industrial wastewaters. electrospun nanofibrous membranes have hi...

BACKGROUND Screening for organ rejection is a critical component of care for patients who have undergone heart transplantation. Endomyocardial biopsy is the gold standard screening tool, but non-invasive alternatives are needed. Cardiovascular magnetic resonance (CMR) is well suited to provide an alternative to biopsy because of its ability to quantify ventricular function, morphology, and char...