Recovery of spores and crystals from the fermentation broth of Bacillus thuringiensis (Bt) was studied using the membrane separation technology. Four types of polymeric membranes, with different characteristics, in the range of microfiltration (MF) and ultrafiltration (UF) were used for evaluating their permeate flux and spore–crystal recovery capacity. Results indicated that both MF and UF mem...

Arsenic (V) removal using cetylpyridinium chloride (CPC) micelles and 5 kilo-Dalton (kDa) polyethersulfone (PES) membrane was studied in the presence of multiple co-ions. The concentrations of arsenic ([As]F = 0 105 μg/L) and co-ions ([CO3] = 0 – 4 mg/L, [PO4] = 0 – 0.3 mg/L, [SiO3] = 0 – 71 mg/L, and [SO4] = 0 – 400 mg/L) in simulated feed water were varied. Without the addition of CPC micelle...

BACKGROUND Cardiovascular disease (CVD) is a frequent complication in chronic haemodialysis (HD) patients. Endothelial dysfunction, as measured by soluble cellular adhesion molecules (sCAM) and von Willebrand factor (vWf) in plasma, is an early manifestation of CVD. Today, it is unknown if, and to what extent, their levels are influenced by the type of dialyser. METHODS Four dialysers, low-fl...

BACKGROUND Levetiracetam is an antiepileptic drug frequently used in critically ill patients. Levetiracetam is primarily eliminated as a parent compound via glomerular filtration and requires dose adjustment in renal insufficiency, but the literature on patients receiving continuous veno-venous hemofiltration (CVVH) is scant. CASE REPORT We report the levetiracetam pharmacokinetic profile of a ...

A process, which does not require the addition of large amounts of chemicals, for the removal of arsenic (V) utilizing amphiphilic aggregates (i.e. cetylpyridinium chloride (CPC) micelles) and ultrafiltration (UF) membranes has been studied. The suitability of UF process was evaluated with semi-equilibrium dialysis (SED) cell since the UF process incorporated with amphiphilic aggregates is an e...

The feasibility of using flat-sheet ultrafiltration polyethersulfone (PES) membranes for treatment of effluent from a rubber glove factory has been investigated. Membranes of molecular weight cut-off (MWCO) 100 kDa and 10 kDa were operated in cross-flow filtration to evaluate the efficiency of rejections of certain selected parameters in the wastewater. The membrane operation was carried out at...

BACKGROUND Xenobiotic chemicals with estrogenic activity (EA), such as bisphenol A (BPA), have been reported to have potential adverse health effects in mammals, including humans, especially in fetal and infant stages. Concerns about safety have caused many manufacturers to use alternatives to polycarbonate (PC) resins to make hard and clear, reusable, plastic products that do not leach BPA. Ho...

In this study polyethersulfone ultrafiltration membrane were prepared with the modifier gelatin at 0, 5, 10, 15 and 20 wt % using DMF as solvent by phase inversion process. Morphologies and characteristics of the membranes were investigated through the methods of SEM, XRD, contact angle measurements. The performance of the modified membrane for the treatment of leather and distillery wastewater...

The proteasome is a multicatalytic protease complex that plays a key role in diverse cellular functions. The peptide vinyl sulfone, carboxybenzyl-leucyl-leucyl-leucine vinyl sulfone (Z-L3VS) covalently inhibits the trypsin-like, chymotrypsin-like and, unlike lactacystin, also the peptidylglutamyl peptidase activity in isolated proteasomes, and blocks their function in living cells. Although des...