Twenty tablets were weighed accurately and powdered. An amount of the powder equivalent to 5 mg of amoxicillin trihydrate (content of one tablet) was dissolved in 60 ml of diluent. The solution was stirred for 10 min using a magnetic stirrer and filtered into a 100 ml volumetric flask through 0.45µ nylon membrane filter. The residue was washed 3 times with 10 ml of diluent and then the volume was completed to 100 ml with the same solvent. This solution was diluted with diluents to gae a concentration of 0.1 mg/ml solution each of Amoxicillin trihydrate.
The form of Salicylic acid used today is known as “Aspirin” which is far less irritating to the stomach. Aspirin is a synthetic pharmaceutical drug that is non-steroidal anti-inflammatory. The physical appearance of Aspirin is a
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 .
The base and acid reacts with each other producing water in the process. This the main way the stomach can be protected from being auto-digesting or digesting itself. ("How does your stomach keep from digesting itself? | HowStuffWorks," n.d.) The mucous doesn’t get digested as it secrets the hydrochloric acid because the pH within the parietal cells remain neutral.
Arrehnius did not explain how acids and bases behave in a non aqueous solution. For example, there is dissociation of acetic acid in methanol: CH3CO2H + CH3OH ⇄ CH3CO2− + CH3OH 2. He claimed that an acid should be an acid in any solvent. However, there is rebuttal nowadays. For example, dissolving in water, HCL behaves as Arrhenius acid but dissolving in benzene there is no dissociation.
Two drops of iodine- potassium was then added to the mixture. The procedure was repeated with the rest of the samples and isopropyl with varying drops of sodium hydroxide. Eight drops of sodium hydroxide was added to formaldehyde, 9 drops to cyclohexanone, 15 drops to benzaldehyde, and 7 drops to isopropyl. It was observed that both cyclohexanone and benzaldehyde formed a yellow layer that lasted only for a few seconds before disappearing completely while the formaldehyde mixture produce a yellow precipitate. Both acetone and isopropyl mixtures were heated since no precipitate was observed.
1 Chromatographic decontamination 1) ion trade Decontamination of steed Ig by particle trade strategies has been portrayed. These creators took after the technique for Ter Avest et.al. (1992) with minor adjustments, utilizing DE-52 cellulose or DEAE CL-6b. 1gram DE-52 cellulose in 6ml 0.01m phosphate cradle (PB) ph6.0 was included every ml of serum.
epidermidis showed growth only in tubes 7, 8, and 9 after incubation period. Whereas tubes 1 through 6 for concentration between 100 ug/ml to 3.12 ug/ml were observed with no bacterial growth (clear). The minimum concentration at which the growth is inhibited in visual observation was recorded as MIC. This MIC for Vancomycin was 3.12 ug/ml in this experiment. To further examine whether or not the Vancomycin is bactericidal for S. epidermidis and at what concentration, the media plates prepared from the clear tubes in MIC determining step were examined.
3. Add 0.5 ml of methylene blue to each tube. Shake the tubes to mix the content. 4. Incubate these tubes for 15 minutes at room temperature and then observe color changes after 15 minutes without shaking.
Mannitol is commonly used as an excipient in the manufacture of chewable tablet formulations because of its negative heat of solution, sweetness, and ‘mouth feel’. 4.2.4 Hypromellose / Hydroxypropyl methylcellulose52,67 1) Nonproprietary Names BP: Hypromellose JP:
The dried roots of Inula racemosa were pulverized and sieved with 100 ~ 200 mesh. The herb powder was placed into a glass bottle. Ultrasound-assisted extraction was carried out in an ultrasonic cleaner RK102H (Bandelin sonorex, Germany). The powder of Inula racemosa was extracted three times under the following conditions: the ratio of material to solvent was 10:1, undergoing ultrasonic treatment 30 minutes at 25 °C, 100 kHz /450 W.31 Before large extraction, a small-scale extraction experiments were carried out: 95% ethanol and ethyl acetate as the extractive solutions was investigated, respectively.
Purpose This experiment is to determine the concentration of the solute copper sulfate pentahydrate, and the unknown solution, by passing different wavelengths of light through each solution. Procedure Weigh out approximately 5g of copper sulfate pentahydrate. Record the mass and place the solute into a 50 mL volumetric flask. Fill half of the flask with distilled water, add the stopper for the flask, and lightly shake the flask, until the copper sulfate pentahydrate fully dissolved.
Introduction The purpose of this week’s lab was to enhance our understanding of the Grignard reagents that were examined in lecture. In this lab, a Grignard reagent will be prepared through the reaction of magnesium turnings and bromobenzene. Instead of isolating the product it will then be combined with benzophenone, which will give the final product of triphenylmethanol. Procedure