Sodium hypochlorite

In the present studies, we have made an attempt to investigate the catalytic activity of as synthesized AuNPs for a model reaction of reduction of 4-NP to 4-AP in the presence of sodium borohydride. The reaction was analyzed by measuring the absorbance of the reaction mixture in the wavelength range of 200-700 nm for fixed time intervals (Fig.8a-b). Initially, the absorption spectra of 4-NP (0.05 mM) showed the absorption peak at…

Synthesis of ZnO Nanostructures ZnO nanoparticles were prepared by using the following reagents : Starch solution Zinc nitrate hexahydrate {Zn〖(NO_3)〗_2 .6 H_2 O} Sodium hydroxide { NaOH) Freshly prepared ammonia solution. In order to prepare 0.01M of ZnO nanoparticles, the following steps were followed: The 0.01 M of Sodium hydroxide { NaOH} solutions in starch was prepared by adding 0.04 gm of NaOH powder dissolved in 100 ml of 3% starch solution. The solutions were stirred for 1…

experiment, a titration was carried out using a standard solution of hydrochloric acid to establish the molarity of a solution of sodium hydroxide. The concentration of acid in the gastric juice sample was determined using that solution of sodium hydroxide. The pH of gastric juice was then calculated and compared with the value determined by…

Pectin yield was determined as weight of dry pectin against the weight of initial residues multiplied by 100%. Y=100(P/Bi) Where Y is the extracted pectin yield (%), P is the amount of extracted pectin in grams and Bi is the initial amount of sweet potato residues used to extract pectin. Equivalent weight and Degree of methoxylation The equivalent weight was determined according to the method by Barretina et al., (Barretina et al. 2012). 0.25g pectin was wetted with 5ml ethanol and topped…

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RESULT AND DISCUSSION 7.1. Preformulation studies 7.1.1. Identification of pure drug by FTIR Figure7.1: Identification of Sample through FTIR Figure 7.2: FTIR Spectrum of Standard Prazosin hydrochloride (with references of B.P.- 2009) Table: 7.1 - Characteristics peaks of Prazosin hydrochloride S.No. Reference peaks (cm-1) Theoretical peak of Prazosin hydrochloride Obtained peaks (cm-1) Functional Group Stretching/ Bending 1 1750-1680 1529.92 1529.92 C=O Stretching 2. 1650-1580…

For acetic acid-sodium hydroxide titration, 10ml of distilled water was added to 250ml Erlenmeyer flask. 20ml of diluted acetic acid was pipetted into that 250ml Erlenmeyer flask. Titration system that contained 0.100M NaOH in the burette was set up. The pH meter was used to monitor pH of the system when sodium hydroxide was being added. NaOH was added in an increment of 1ml until the pH of the solution reached…

Coulter Counter Method. Schematic Diagram Diagram 1: The basic setup of coulter counter method. Test tube containing conducting fluid placed in the beaker containing same conducting fluid. Orifice in the test tube connect the circuit. Electrodes are placed in beaker and test tube and voltage is applied. Vacuum is applied in the test tube to allow fluid movement from beaker to test tube. Counting circuit will calculate the amount of particle and pulse height analyser will measure the particle…

85 mg of sodium chloride were dissolved in one litre of distilled water. 2. Buffered substrate: 2.76 g of lithium lactate was dissolved in 125 ml of glycine buffer containing 75 ml of 0.1 N sodium hydroxide solution. This was prepared just before use. 3. 0.4 N NaOH. 4. 5.0 mg of NAD+ was dissolved in 1.0 ml of distilled water just before use. 5. 2,4-dinitrophenyl hydrazine reagent (DNPH) : 200 mg of DNPH was dissolved in one litre of 1 N HCl. 6. Standard pyruvate solution: 12.5 mg of sodium…

Freezing salt-water experiment Contents: Contents, introduction and literature review on page 1. Aim, hypothesis, variables, risk assessment, materials and method on page 2. Results on page 3. Discussion and conclusion on page 4. Introduction: I have decided to do my SRP on salt water freezing because our planet is 71% water and about 96.5% of it is in the ocean which it is salt water so this is why I was interested in seeing how much salt, depresses the water from freezing. Literature…