Magnetic stirrer

micro-liters of catalyst using a micropipette into the hydrogen peroxide Step 6: Measure the pressure build up of the catalyst with the hydrogen peroxide, again using the gas pressure sensor Step 7: Constantly stir the hydrogen peroxide with the magnetic stirrer to release oxygen gas trapped inside the solution Step 8: Add 10, 20, 30, and 40 ml of distilled water into the test tubes Step 9: Draw 1 mL of solution from the graduated cylinder with a micropipette and transfer it to test tube B and…

prepared by dissolving 17 mL TBT in 30 mL anhydrous ethanol with stirring (300 rpm) for 30 min. The other solution that contained 28.35 mL anhydrous ethanol, 7.25 mL deionized water and 20 mL 3 M acetic acid was slowly added into the above solution with magnetic stirring at room temperature. The prepared mixture was further hydrolyzed for 60 min with stirring until the transparent sol was obtained, which was aged for 20 h at room temperature. Thus prepared TiO2 was dried at 80 °C in an oven for…

Subject: Experiment 23: Stereochemistry of the Addition of Bromine to trans-Cinnamic Acid Introduction/Abstract: The purpose of this experiment was to carry out the bromination of trans-cinnamic acid, to determine the stereochemistry of the dibromide product of 2,3-dibromo-3-phenylpropanoic acid, and find out whether the reaction proceeds by the usual bromonium ion mechanism or some other mechanism. In this experiment trans-cinnamic acid was mixed with glacial acetic acid and stirred in…

Research Article Pharmacy Practice GELLIFIED EMULSION FOR SUSTAIN DELIVERY OF ASPIRIN AS ANTI-INFLAMMATORY INTRODUCTION Aspirin is a non-steroidal anti-inflammation drug (NSAID). It widely use as analgesic in treating mild to moderate pain such as injury, headache, arthritis, menstrual cramp and other musculoskeletal condition. Aspirin is an ester of salicylic acid, while after ingestion it will undergoes hydrolysis which produce salicylic acid and acetic acid. Salicylic acid…

A solution of 0.0025g/ml of sweet potato pectin in deionized water, the mixture was stirred on a magnetic stirrer for 1 hour. Thereafter, the solution was sonicated at either 200W or 400Wltrasonic power levels, and constant frequency 25 kHz, duty cycle 60% and the sonication time was fixed at 20minutes, sonication was done at ice cold temperature. The sonicated…

The reaction mixture was heated with occasional stirring for 10 minutes. Next, another mixture containing 1.3321g tributyl borate, 3.0005g of vanillin and 15ml of ethyl acetate was prepared in a 50 mL conical flask. The mixture was mixed and a magnetic stirrer was added to the mixture. The mixture was then stirred on a hot plate for 5 minutes at room temperature. After mixing, the boric oxide/acetylacetone mixture was then added to the tributyl borate mixture using a spatula. The reaction…

filtration and then washed three times with DI water and anhydrous ethanol. Batch experiments All batch experiments were conducted in 300 mL conical flasks sealed with screw caps at room temperature (25 ± 0.5°), and mixed with a standard magnetic stirrer…

The NaCl was added to the effluent at 2.5g/L at constant applied current density (0.5 A/dm2). Effluent was continuously stirred during the treatment using a magnetic stirrer. Experiments were carried out under batch conditions for 2 hours. In electro oxidation process, the effluent was treated at different concentrations of parachlorophenol 25, 50, 75 and 100 mg/L. COD was determined periodically to know the extent…

NANOCARRIERS AS PROMISING NOVEL SYSTEMS FOR CONTROLLED DELIVERY OF DICLOFENAC SODIUM [N.B: Authors' details blinded by Pro Journals for Review] ABSTRACT The formulation and evaluation of Diclofenac sodium from liposomes, niosomes and nanoemulsion are analyzed. The release profiles of Diclofenac sodium were almost similar in all the formulations. It is found that 85% of Diclofenac sodium diffused out from the colloidal systems within 8hrs and practically all the drug was released within…

Microwave (MW) assisted Esterification of Benzoic Acid (BA) offers the advantage of transformation of energy and heating throughout the volume efficiently in a shorter period and eliminates the use of excess solvent, during the course of reaction. The present study aims to assess the conversion and selectivity for the production of methyl benzoate compounds by esterification of benzoic acid using microwave irradiation. Effects of operating parameters such as reaction time, feed composition,…