Investigation on recovery of alkaline protease from B. licheniformis ATCC 21424 fermented wastewater sludge was carried out by centrifugation and ultrafiltration. Optimization of ultrafiltration parameters (transmembrane pressure (TMP) and feed flux) was carried out with 10 kDa membrane. TMP of 90 kPa and feed flux of 714 L/h/m(2) gave highest recovery (83%) of the enzyme from the centrifuged s...

objective: microbial plaque is among the main etiologies of periodontal disease, and tooth brushing with toothpaste is the most commonly used method of plaque control. this study aimed to compare the efficacy of tooth brushing with and without three different dentifrices.   methods: thirty dental students were randomly selected to participate in this clinical trial and were asked to refrain fro...

Cellulose fibers isolated from oil palm empty fruit bunches (OPEFB) have been studied as a potential reinforcement for polyvinyl alcohol (PVA) biocomposite. Analysis of variance (ANOVA) showed that all three parameters—hydrolysis temperature, time and acid concentration, well their interactions—significantly affected the yield cellulose. Moving Least Squares (MLS) Multivariable Power (MPLS) mod...

fungicidal efficiency of iranian made benzalkonium chloride named akhgar, afshang and hamoon were evaluated on pure culture species of aspergillus nijer, candida ablicans and mucour according to the standard method no. 2442 issued by the institute of standards and industrial research of iran, from october 1993 to march 1994. suspensions were prepared in a way that each cubic centimeter having 3...