Ascorbic acid

It does so via the use of two-component systems, one of which is called PhoPR two-component system6. In order for Mtb to survive, it must synthesize its own biotin, an essential cofactor that is involved in the biosynthesis of some fatty acids (e.g. mycolic acid), from pimeloyl-CoA7. During infection, Mtb primarily resides in macrophages, which, normally,…

Abstract: When an acid and a base combine, the base neutralizes the acid in a chemical reaction. This is how an antacid works (Gomez). During this project, we will test which of the 3 generic brand antacids chosen are most potent in neutralizing lemon and grape juice. This can be helpful in a real life situations, if you are experiencing heartburn, acid reflux, and/or dietary problems. This experiment will help you decide which antacid actually diffuses the acid in your stomach and has the…

5967M) * (65.05 g/mol) = 35.85 g/L 4) Percent Acid ((g/L)/(given density)) * 100 ((35.85 g/L)/(1005 g/L)) * 100 = 3.57% UNKNOWN ACID 1) Moles of NaOH ((Vf - Vi)/1000) * M Run #1: ((31.11 – 0.51)/1000) * 0.2116m = .006475 Run #2: ((31.35 – 0.38)/1000) * 0.2116m = .006553 2) Calc Moles of Acid because 1:1 ratio moles acid equals moles NaOH moles acid = Run 1: .006475 and Run #2: .006553 3) Molar Mass (grams used/moles acid) Run #1: (1.3160g/.006475) = 203.24…

Methods Some setup was required to conduct this experiment. The materials needed were five transplants, soil, carbonated water, vinegar, five clear plastic containers, an aluminum tray, and pH strips. The transplants used in this experiment were romaine lettuce transplants (Lactuca sativa). Each of the five plastic containers were punctured underneath to allow for water drainage. Each container was received a transplant and was filled with soil. The five conditions tested were the control…

amount of oxalic acid in the sample solution. The analyte solution containing oxalic acid was added with sulfuric acid and heated prior to the titration with permanganate. The persistent pink color signaled the end of the titration. The amount of the oxalic acid in the solution was found to be 8.941%. The redox titration was precise in the quantification of oxalic acid with a standard deviation of 1.327%. Introduction One of the natural organic compounds found in plants is the oxalic acid. It…

The developed method consisting the mobile phase 3g of Docusate Sodium was dissolved in 580 ml of Methanol, sonicated to dissolve to this 420 mL of milli Q water was added and pH was adjusted at 3.0 with perchloric acid with isocratic programming, XTerra RP 18 column (250mm×4.6mm, 5μm) column as stationary phase with a flow rate of 1.0 ml/minute. Proposed method was found to be linear in the concentration range of 18.80 to 56.60 µg/mL for Aminexil and 25.00 to 75…

25 M Hydrochloric Acid Abstract The aim of the study was to standardise a solution of hydrochloric acid with an approximate concentration of 2.5 M against sodium carbonate solution. The main steps of this experiment were preparing the sodium carbonate solution, transferring the solution into a conical flask by using a pipette, adding the bromophenol blue indicator and titrating with hydrochloric acid until the first green colour appeared. The concentration of hydrochloric acid was found to be…

vigorously, solution changed from colorless to pale yellow. Sodium thiosulphate and hydrochloric acid were added aswell. Product collected by vacuum filtration and recrystallized from 96% ethanol. IR- and H- NMR-spectrum were taken to determine the location of the I+. I had a yield of 0,7 g (2,66mmol, 18,2%). The iodide’s position is opposite of the –OH group. Salicylamide…

The other systems of metabolic pathway II is 4-hydroxy - isopropenyl benzene acted as precursors for the forming of p-hydroxybenzoic acid. Pathway III is the original carbon -carbon cleavage on bisphenol accompanied by oxidation causes the forming of hydroquinone (Fig 4). The similar kind of degradation pathway by bacterial isolates were reported (Zhang et al., 2007 and Janett Fischer…

individual amino acids. Each of them may have positively charge or negative charge depending on the pH of the milk. At certain pH value, positively charges and negatively charges of the casein will equal, so that the number of electrons equals to the number of protons. [1] Approximately pH 4.6 is the pH value that acid casein is precipitated and least soluble. In milk, which has a pH of about 6.6, the casein has a net negative charge and is quite stable. However, if there is addition acid adds…