Chemical reaction

2.3.1.2 Antioxidant analysis Two methods to measure the antioxidant activity are by determining its ability of hydrogen atom donation to a reactive species and/or check its ability to take off any molecules of oxidative initiation. Total antioxidant capacity (TAC) level evaluation can be classified into a direct method and indirect method. Indirect method or in vitro method consists of DPPH radical scavenging activity assay, Trolox equivalent antioxidant capacity (TEAC) and oxygen radical…

Protein Purification Practical Report Student Name : Noel Murphy Date : 28 February 2015 UF/DF Practical Question Report Ultrafiltration (UF) and Diafiltration (DF) steps are carried out prior to every chromatography step and post the final polishing chromatography step. These UF and DF steps are vitally important, the UF step concentrates the protein product into a smaller volume of buffer, while the DF step alters the conditions the protein product is sitting in i.e. Buffer exchange.…

This is because the oil molecules are much bigger than water molecules that has more surface to stick to one another because more energy is needed to overcome the chemical…

The initial observation was the officials sprinkle salt only on roads that are icy . The question was what effect does salt have on the ice? Hypothesis was formulated, salt water will melt ice cube faster than the pure water because salt lowers the freezing point of ice in salt water. The prediction was ice cube melts faster in salt water than pure water. The following was the procedure of this experiment was: fill out 100mL water into each 250mL empty beaker, add 0.5grams of salt to one of the…

The first step is to put on your goggles and apron. Then you need to gather your materials. You then need to make observation of the hydrate. Observe the color, state, texture, etc. to smell the unknown substance you need to waft the substance by slowly moving the smell of the liquid to your nose. Step 2- For the lab my group changed the way we were doing the experiment for time. This is the first way that we did it for trails one to two. First you need to get a beaker and mass it on a scale…

Conclusion: The general conclusion that I was able to produce about the effects of salt on the boiling point temperature of water is that with the addition of salt, the boiling point temperature of water increases. The results of the lab experiment do agree with my predictions and I can accept my initial hypothesis. However, I believe the data would be more consistent and solid had 2M and 4M of NaCl had been included in the experiment, rather than jumping from 1M to 3M to 5M. Discussion: For…

Introduction The question that this experiment asks a lot of people is that will the water rise when you lite a certain amount of candles, and if so, how high will it rise. In this experiment, my hypothesis was that the more candles you lite, the higher the water will rise as the experiment proceeds. I know this is right because I have seen many videos about this and I have done many experiments like this one. Experimental design In this experiment you will need many different…

distilled water used was up 350 mL in order to make sure the reaction was smoothly occur in the 500 mL round bottom…

Sujata Neupane Partner’s name: Samiksha Pathak Aryal Measuring Specific Heat Capacity of Unknown Metal The purpose of this experiment is to identify the unknown sample by calculating its specific heat capacity. 1. Introduction: Heat is a form of energy that is transferred between objects with different temperatures. The amount of heat released or gained by an object (q) depends on the mass of the object (m)…

Based on the experiment, it shows that the bromelain is started stable at 25% of enzyme concentration to 100% of enzyme concentration, pH 4 to 11, and the temperature range from 4oC to 37oC. For the concentration, it could happen because the presence of bromelain could break down the gelatin which makes the not solidified formation of the solution. In the temperature test, the lowest temperature makes the bromelain become optimum temperature which is regarded favorable for the digestive process,…