The reaction process is shown by Figure 1 below. Equimolar amounts of sulfasalazine and cholinium hydroxide were mixed as a 45% solution in methanol. The sulfasalazine would ionise in the solution to form an ion‚ which would combine with the cholinium ion present in the solution to give the desired product. The methanol solvent was evaporated‚ and the remaining residue was dehydrated by vacuum. The product obtained appeared as a red glassy
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Experiment #8 – properties of Alcohols and Phenols Introduction As has been mentioned before‚ over 20 million organic compounds have been identified. If each substance had to be studied as an entity completely separate from all the other substances‚ the study of organic chemistry as a whole would be impossible; that is to say‚ even more impossible than you currently believe it to be. Fortunately‚ the subject can be organized and it is often organized around the concept of the functional group
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in cropping year 2014. Different varieties of fenugreek seeds were ground using mortar peston to get fine flour and immediately used for extraction. Extract preparation For each replicate 5 g of seed flour were extracted twice with 30 ml of 80% methanol (V/V) and incubated in room temperature for overnight with stirring (orbital shaker 100 rpm). After the incubation the mixture was pooled and centrifuged 5000 rpm for 10 min. Supernatant was filtered through filter paper (Whatman No 1) and vacuum
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Title: Nitration of Methyl Benzoate Objective: To prepare methyl-3-nitrobenzene from nitration of methyl benzoate. Results and calculations: Density = 1.094 g/ml = Mass of methyl benzoate = 1.094 g/ml x 2.8 ml = 3.0632 g no. of mol of methyl benzoate = = 0.022499 mol 1 mol of methyl benzoate produced 1 mol of methyl m-nitrobenzene. Therefore‚ 0.022499 mol of methyl benzoate produced 0.022499 mol of methl
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In order to carry out a detailed stability study of OXP and CYPZ in combination‚ it is essential to have a single stability-indicating assay method which can separate both drugs along with all of their degradation products from each other. Therefore‚ a RP-HPLC method was developed and optimized. Optimization of the chromatographic conditions In this study‚ the different experimental parameters were carefully studied and optimized in order to improve the performance and system suitability parameters
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carota. ABA was dissolved in methanol‚ SNP‚ SA‚ MeJA‚ and PHE were dissolved in water. The stock solutions of each substance were sterilized by passing them through a 0.22 μm (Nupore Filtration Systems‚ UP‚ India) filter. The actively growing cell suspension was treated with elicitors
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39. The Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and
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Louis Pascual Relao De La Salle University- Dasmariñas Dasmariñas Cavite Philippines ABSTRACT The Copper Reactions experiment was demonstrate by adding the reagents like 16M HNO3‚ Distilled water‚ 6M NaOH‚ 6M H2SO4‚ Acetone‚ Zinc metal and Methanol into the beaker with the copper wire. The experiment was also demonstrated to observe how copper reacts while different reagent were being added. It was also demonstrated to practice the common laboratory techniques such as method of separation involving
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3.8.1.2 Leaf area and leaf area index (LAI) Leaf area of five randomly selected plants‚ was measured with the help of leaf area meter (Model LI-3100‚ USA) at 20‚ 40 and 60 DAS by destructive sampling from all leaves of the five sample plants (Sticker et al.‚ 1961). Plants were cut at the soil surface‚ leaves were separated from the plants‚ covered with blotting paper to keep the leaf intact and retain its original shape and were brought to the laboratory. Leaf area was measured immediately after
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syriaca‚ C. capitatus‚ T. capitatum‚ A. palaestinum and U. pilulifera [40]. In addition‚ 21 species collected from different Jordanian localities including A. palaestinum are evaluated for their antioxidant activity and showed that the DPPH-TEAC of the methanol extract of the studied taxa were varied from 4.1 to 365.0 mg/g dw versus 0.6 to 267.0 mg g-1 in aqueous extracts and A. palaestinum leaves gave moderate activity (DPPH-TEAC range 20-80 mg g-1) and showed that the potential rule in radical scavenging
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