Angiotensin-converting enzyme

Contreras, Ailly Lam, Aleksi Ska. Background information Enzymes are biological catalysts, which speed up the rate of chemical reactions. The pancreas produces a concentrated solution containing a mixture of enzymes – amylase, lipase and protease. In this experiment you will examine the effect of protease on casein, the protein found in milk. When the protease breaks down the casein, the opaque solution will become transparent. Theoretically, Enzyme activity increases with an increase in…

Analysis and Discussion The hypothesis that amylase would no longer hydrolyse the starch solution into maltose past 37°C was not supported by the data. Fig 1b, Fig 2.1 and Fig 2.2 all show the colour samples for various temperatures taken at increments of 10 seconds up to 40 seconds. Initially, 4°C was the slowest followed by 19°C then 37°C, 45°C, 80°C and 60°C being the fastest acting in the first 30 seconds. 80°C was the second-fastest acting temperature up until 20 seconds, but slowed down…

Investigation was carried out to assess the effect of salt concentration on quality of sauerkraut prepared from mature cabbage head. Cabbage sample were chopped in small pieces and mixed with different salt concentrations ie., 2.0, 2.5, 3.0, 3.5 and 4.0 % and allowed to ferment for preparation of sauerkraut at ambient condition. Acidity of sauerkraut increased with increase in fermentation period and it reached maximum on 21 days after fermentation and thereafter it decreased in all the salt…

Protein Casein DCP & CE Hypothesis: Casein is made up of many 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…

Elizabeth Barron Winters July 9th, 2017 Case study 1 Atkins or Fadkins Part 1: Macronutrients and energy Question 1: Proteins: do most of the work in the cells, required for structure, function, and regulation of the bodys tissues and organs. They also transport nutrients and are catalyst. Examples of proteins are nuts, meats, and beans. Carbohydrates: source of energy for the body, simple and complex carbs. Examples are fruits, pasta, sugar, and, grain. Fats: store energy, aid in…

Discussion Graph 1 displays the reaction time (in minutes) of how long it took for the Alka-Seltzer tablet to completely dissolve per trial. Graph 2 displays the averages of the reaction time which showed the higher the water temperature is, the faster the reaction time would be. At 65⁰C the average time for the Alka-Seltzer to completely dissolve was 1 minute 4 seconds followed by 1 minute 20 seconds at 35⁰C and ending with the highest average at 2 minutes 1 second (1.61). The hypothesis…

Question: How does temperature affect the rate of osmosis in raisins? Background: Osmosis is the passage of a solvent through a semipermeable membrane from a less concentrated to a more concentrated solution until both solutions are of the same concentration We designed an experiment that would test if a raisins rate of osmosis is affected by the temperature of water it is placed in. The independent variable in this experiment was time which was 10 minute intervals. The dependent variable…

Aim: This experiment will investigate the effects of different concentrations of fertilizer on the growth of duckweed. Hypothesis: It is expected that the cup with the most amount of fertilizer (cup D) over the 14 days will have the most amount of growth compared to cup A, B and C. Apparatus: 4x polystyrene cups 20x duckweed fronds (5 in each cup) 1x 5ml medicine teaspoon 1x tweezers 1x syringe 1x marker fertilizer Method: 1. Label each cup as A, B, C or D with the marker 2. Using the…

3.1 Cure characteristics of CIIR with accelerated sulphur The cure characteristics of CIIR with an efficient type of accelerated sulphur (EV) system at different vulcanization temperatures are depicted in Figure 2 and Table 2 respectively. The EV system used here particularly to reduce the set properties at elevated temperature as it possesses relatively less polysulfidic linkages as compared to the conventional sulphur vulcanization (CV) system. It can be seen from the figure that the…

3.1 The isolation of Aeromonas hydrophila When using selective medium developed by Rimler and Shoots (1973), we obtained 95 bright yellow colour isolates with white edge which lead to the alleged as A. hydrophila. Of 95 isolates were further screened using SNI 7303 (2009) methods which produce 56 isolates. The isolates were further screened using Dorsch et al. (1994) and Cascón et al. (1996) method. 3.2 Bacterial DNA isolation and Identification. DNA amplification using Dorsch method…