food chemistry essay

Name Course Tutor Date Characteristics of enzyme catalyzed reaction Experiment 1: Measurement of progress curve Treatment of Results Molar absorption coefficient of PNP at borate pH 9.0 = 18,000 mol-1cm-1 = ε x l A=ε x c x l Where A is the absorbance ε is the is the molar extinction coefficient in mol-1dm3 cm-1 c is the concentration mol dm-3 l is the path length cm Dilution factor 1 + 5 = 6 ml Dilution factor= 6/1=6 Absorption of 1.0 at 410 nm Concentration of PNP = 0.0003 M Mole in 1 ml 0.0003/(

After ibuprofen samples had endured their given exposure time and were capped, cetirizine research samples were prepared in order for analysis. The extraction solvent used for this part of the experiment was 25% distilled water and 75 % methanol. Any cetirizine solutions made with the extraction solvent were exposed in the proper organic waste container after use. Initially, a clean 25.00 mL volumetric flask was conditioned with the extraction solvent. The capped pills samples were recommended to

If the amount of nitrates due to fertilizer runoff increases in an aquatic ecosystem, then the amount of algae in that ecosystem will increase at an accelerated rate. Four predictions coming from our experiment are if nitrate levels increase then algae growth will be accelerated. The second prediction is that if nitrates levels increase and algae increases then dissolved oxygen in the water will be at a lower level. The third prediction is that if nitrate levels increase in the water then the amount

Discussion 2 A.1 The experimental determined freezing point of the cyclohexane was 6.5 degree Celsius. By averaging the freezing points of trial 1 and 2, which are 6.4 and 6.5 degree Celsius respectively, the freezing point is calculated. A.2. On adding solute, the freezing point of cyclohexane is lowered. A.3. The weighed initial masses for dish #1 and #2 are 0.248 g and 0.102 g respectively. In order to calculate the molar mass for dish 1 and 2, the following calculations

1. Both answers are correct. There are two different models for substrate binding: lock and key or induced fit. In the lock and key model, the active site of unbound enzymes fits perfectly with the complementary shape of its substrate. In the induced fit model, the enzyme changes shape to confirm to the substrate after binding. 2. If Keq = 1, what is the ∆Go´? 0 If Keq > 1, what is the ∆Go´? Negative Exergonic If Keq < 1, what is the ∆Go´? Positive Endergonic 3. How is free energy useful

Alka Seltzer is a medicine that acts as a pain reliever and an antacid. Antacids are used to help neutralize the acids in the stomach and help treat acid reflux, heartburn, indigestion, and gastritis. The tablets contain sodium bicarbonate (NaHCO3) and citric acid (C6H8O7). The sodium bicarbonate is a base that helps neutralize the acids in the stomach, mainly hydrochloric acid (HCl). It does this by the following reaction: Na3C3H5O7(aq) + 3HCl(aq) H3C3H5O7(aq) + 3NaCl(aq). When the tablets are

Before the start of the experiment, the theoretical yield was to be calculated. First, the limiting reagent was determined from the reagents by comparing the amount of moles. Among the three reagents involved in this experiment - camphor, sodium borohydride, and methanol, camphor was found to be the limiting reagent. The moles of camphor was less than the combined moles of the other two reagents. The theoretical yield, which is the amount of product that could be possibly produced after the completion

Is your hair dry and damaged and you just don’t know what to do with it? With salon treatments and overpriced products, you may have just given up on your hair. Maintaining and repairing your hair starts from your daily routine. Formulating treatments in the comfort of your own home without making a dent in your wallet is the next step. Get ready for shiny, healthy, and frizz- free hair! Causes of Damaged Hair The most common type of damaged hair is caused by chemicals. Harsh chemicals, perms, color

Post-Lab Questions Pages 524 – 528 3. a. Since the pKa value of sulfuric acid (-3) is smaller than that for nitric acid (-1.3), sulfuric acid is a stronger acid. b. The chemical equation for the equilibrium involving the reaction of sulfuric and nitric acids is as follows: H2SO4 (aq) + HNO3 (aq) HSO4- (aq) + H2NO3+ (aq) c. Calculations used to determine the value of Keq for the acid-base reaction in Part b are as follows: Keq = (Ka1) x (1 / Ka2) Keq = (103) x (1 / 1013) Keq = 10-10 7. The nitro

What fulvalenes are and how can we synthesis fulvalenes containing chalcogen on their molecule type. Compounds like benzophenon, thiobenzophenone and selenobenzophenone are some fulvalenes that contain Oxygen, Sulfur and Selenium. The preparation of those compounds is different for each one, however, benzophenone can be the counteract to synthesise the others. A fulvalene is a hydrocarbon obtained by formally cross-conjugating two rings through a common exocyclic double bond. The name is derived