of 3.0 % caustic soda solution are added The mixture is stirred for 5 min in a rapid sand washer. Sufficient water is added up to the level line marked on the bottle. The liquid is then siphoned off after 10 min. The bottle is refilled twice more and siphoned the liquid off. The sand is placed in the oven for drying.
Agitation speed was maintained at 350 rpm which helps in complete removal of methylene chloride. Microspheres were then collected, filtered, washed three times with distilled water and stored under reduced pressure, overnight in a desiccator. Additionally, optimization of the process was done by selecting suitable stirring device element i.e. magnetic stirrer vs mechanical stirrer in order to improve the shape and yield of microspheres. A paired t- test was applied for final selection of the stirring element based on 95% confidence
Inulin Extraction: Viable processes for inulin extraction have been previously reported by Hébette et al., (1998) and Franck, (2002 a). Hébette et al., (1998), indicated a successful application of hot water (95°C) on sliced chicory roots for the isolation of inulin. The resultant crude inulin extract was then concentrated under reduced pressure and subsequently crystallized as a pasty substance at cold temperatures (4°C) over a period of 30 hours. The recovered product was ultimately spray dried to yield a white powder. Difficulties were encountered however in the processing and removal of the final product by filtration after crystallization.
In this paper, a method for modifying hydrophilic nano-silica using water soluble SDS and silane coupling agents was studied. Since SDS dissolves in water, the mixing of nano-silica in SDS gives a better dispersion and it modifies the surface of nano-silica well. By subsequent analysis, the SDS concentration as well as the dispersion time and temperature have been optimized. The optimum concentration of SDS was identified as 1 wt%. The temperature was controlled at 50±2°C and a dispersion time of 15 min was used and kept for 3 hours for obtaining a stable dispersion of nano-silica.
In this case, the addition on the product side needs to be balanced by formation of the original solid.  This experiment aims to test a saturated solution of calcium hydroxide and calculate the Ksp of the compound. METHODOLOGY Table I. Six media at different conditions Medium Condition A : 50 mL distilled water : 28º C B : 50 mL distilled water : 80º C C : 50 mL distilled water : 10º C D : 50 mL 0.10 M CaCl2 : 28º C E : 50 mL 0.50 M KCl : 28º C F : 45 mL distilled water + 5 mL 95% thanol : 28º
For example, coating test will be started using slow setting emulsion at about 3 percent added water. When aggregate is mixed with water sixty seconds of mixing time is sufficient. Bitumen emulsion is added afterwards and then mixed for about 1 minute until even coating is obtained. With an additional increment of 1 percent water by weight of dry aggregate new batch will be prepared. Coating of aggregate in excess of 50 percent shall be considered acceptable.
The amounts of sodium alginate and calcium chloride on the properties like drug release and hardness of salbutamol sulfate sustained release matrix tablet were analyzed and optimized based on 32 factorial design. The three-dimensional response surface plots and corresponding contour plots indicate the deceased values of R6h and increased values of hardness with the increment of amounts of sodium alginate and calcium chloride in salbutamol sulfate matrix tablets. These developed optimized salbutamol sulfate matrix tablets showed prolonged sustained release of salbutamol sulfate over 6 hours, which might be beneficial over the conventional tablet to reduce the dosing frequency with improved patient compliance. Conflict of interests All authors report no conflicts of
Cement manufacture is energy intensive and contributes a considerable amount of CO2 emissions into the atmosphere. In this study, Corn cob ash (CCA) was used as the blending agent with cement in concrete. The experimental plan was designed to carry out compressive strength, flexural strength, density and water absorption tests on grade 30 concrete using 0, 5, 10, 15 and 20% CCA contents. The results indicated that compressive and flexural strength decreased with increase in CCA content and increased with curing period. The optimum blend was obtained at 10% CCA and 90% OPC contents with compressive and flexural strength values of 30.17 N/mm2 and 5.64N/mm2 at 90 days respectively.
The synthetic hydrolysate liquor contained (M) sulfuric acid, 50 g/L xylose, 1.5 g/L and distilled water. 1 g/L of sulfuric acid was used as the concentrate solution at the beginning of an experiment to provide sufficient conductivity to the solution. After removing sulfuric acid from the liquor (diluate solution), the run was paused for 30 min, the electrodialyser stack was washed with copious amounts of water, and the sulfuric acid enriched recovery solution was further passed. Flow rate was varied between 3 and 20 mL/min, whereas, the applied electric potential was kept constant. The results of the effect of feed flow rate on sulfate ions removal were utilized to optimize separation of sulfuric from the lignocellulosic hydrolysate liquor and can be used for further scaling up.
Hence, Tween 20 was selected as Surfactant for enhancing drug loading capacity. Co-surfactants were selected based on their ability to form stable and clear microemulsion at a minimum concentration. Based on this, several co-surfactants like Polyethylene Glycol 400 (PEG 400), Glycerol, Polyethylene Glycol 600 (PEG 600), Isopropyl alcohol and Isobutyl alcohol were screened. From that, PEG 400 was selected as gave transparent and clear microemulsion at low concentration. Solubility of drug in PEG 400 was checked and it was found to be 3.23 mg/ml.