Figure 1 shows the diluted and actual concentrations of salicylic acid, the concentration and log value of aspirin at various times. Time / min C1 / mol L-1 C2 (actual) / mol L-1 [Aspirin] / mol L-1 ln([Aspirin]) 0 1.996*10-5 9.98*10-4 0.0225 -3.79 10th 6.925*10-5 3.46*10-3 0.0200 -3.91 20th 1.135*10-4 5.68*10-3 0.0178 -4.03 30th 1.372*10-4 6.86*10-3 0.0166 -4.10 40th 1.653*10-4 8.27*10-3 0.0152 -4.18 50th 1.828*10-4 9.14*10-3 0.0144 -4.24 60th 1.953*10-4 9.77*10-3 0.0137 -4.29 Figure 1. A graph of ln([aspirin]t) against time (min) was plotted. The gradient gave the value of K, the rate constant for the reaction. Figure 2 shows the plotted graph Figure 2.
From the bromination of 0.05g aniline, 0.156g of the product was collected. The percent yield was calculated to be 88.1%. Some amount of the product was lost when transferring the product from the Buchner funnel to the balance to measure its mass. To ensure the formation of the desired product, melting point of the product was measured to be 119.8-121.90c, which is in the range of the normal melting point of 2,4,6-tribromoanilne, 120-1220c. Thus, the product was indeed
Free acid was also presented as a peak at 1693 cm-1 associated with C=O stretch and 1157 cm-1 correspond to the C-O stretch. These peaks were absence in its sodium salt spectrum. The thermogram of DFA measured by DTA is also displayed in Fig. 2, which shows the endotherm curve of melting at 173.8 °C, similar with the base-drug property (Barbato et al., 2003). Therefore, based on both FT-IR and thermal analysis, confirmed that DFA was successfully prepared from DFS hydrolysis and ready to be used as a co-crystal raw material.
Synthesis of g-C3N4 The graphitic carbon nitride (g-C3N4) was prepared by direct calcination of melamine precursor. Melamine (10 g) was taken in a silica crucible with cover and calcined at 823 K for 4 h in a muffle furnace. After 4 h, the crucible was allowed to cool down to room temperature naturally and the resulting yellow color product was grounded into powder using mortar and pestle and stored for the further composite material synthesis. The synthesized g-C3N4 was denoted as
Fe3O4 nanoparticles were synthesized according to our previously reported method by chemical co-precipitation of Fe2+ and Fe3+ ions with a molar ratio of 1:2 . Briefly, 2.4 g of FeCl3.6H2O and 0.8 g of FeCl2.4H2O were dissolved in 30 mL of deionized water under using continuous N2 purge at 70 °C. and Under vigorous stirring, followed by dropwise addition of 10 mL of NH3.H2O was dropwise added to the reaction mixture until the color of mixture turned to black and kept reacting for 90 min to complete the reaction. At the end, the synthesized Fe3O4 nanoparticles were separated by a magnet and washed by using water and ethanol for further three times with 89.3%
Sunflower oil was used as a source of triacylglycerol analysis. The experiment focuses on the determination of Iodine and Saponification number. Saponification values of oils were determined using the chemical method called saponification method. A standard solution 0.1N potassium dichromate was prepared by weighing about 1-2g of anular crystals accurately in a chemical balance. Iodine number is the number of grams of iodine or iodine compound absorbed by 100gm of oil.
[Figure 1] 2.2.1. Chloromethylation of poly sulphone 5 g of polysulphone was dissolved in 75 mL of chloroform at 70°C. After complete dissolution of polymer, a mixture of paraformaldehyde (3.4 g) and chlorotrimethylsilane (14.7) mL was prepared as the chloromethylating agent with constant stirring which was followed by the addition of 5% of stannous chloride (by weight, of polymer) as catalyst with stirring at 70°C and allowed to react for 18 h. Then the polymer was precipitated in methanol to eliminate
Then it is sonicated it for 10mint. TRAIL METHOD-III Mobile phase Mixed Phosphate Buffer (55:45) λmax 270 nm Flow Rate 1ml/min Column Inertsil C8 150 x 4.6 mm Retention Time 1.567 min Efficiency 999 Preparation of mobile phase Take 16.25gm of potassium dihydrogen phosphate and 0.3gm of dipotassium phosphate in volumetric flask and make volume up to 550ml by adding phosphate buffer to it , 450ml of Acetonitrile is added to the above one and made volume to 1000ml. Then it is sonicated for 10mint. TRAIL METHOD-IV Mobile phase Mixed Phosphate Buffer (55:45) λmax 270 nm Flow Rate 1ml/min Column Inertsil C18 250 x 4.6 mm Retention Time 2.713 min Efficiency
A total of 0.1 ml of supernatant was added to cuvette containing 1.9 ml of 50mM phosphate buffer (pH 7). The reaction was started by the addition of 1 ml freshly prepared 30mM H2O2. The rate of decomposition of H2O2 was measured spectrophotometrically at 240 nm. Catalase values were expressed as n moles H2O2 consumed/min/mg protein. Measurement of lipid peroxidation TBARS, a measure of lipid per oxidation, was measured as described by Ohkawa .
1 we have to scene that there were two types of graphs, in the first graph the molar ratio of Mn was made constant and the molar ratio of Cu was varied and in the second graph the molar ratio of Cu was made constant and the molar ratio of Mn was varied. The amazing thing we have to find out that the increasing concentration of Cu more than 13% in Cu-Mn catalysts has a negative effect on the catalytic