Peroxide

inside of nearly every living organism that is exposed to oxygen. Some examples of catalase enzymes are bacteria, plants, and animals. The main job of a catalase enzyme is to catalyze the decomposition of hydrogen peroxide to water and oxygen. When an enzyme is exposed to hydrogen peroxide or certain other chemicals it is prone to react. Catalase enzyme reactions also depend on the temperature they are exposed to. As enzymes are exposed to cool temperatures they vibrate less. They do not lose…

Anthony Alvarado Bio 1A Chronic oxidative stress via hydroxyl radical and imbalanced redox homeostasis Redox hemostasis has been shown to be an important factor in the overall aging and neurodegeneration processes in mammalian models; such as, Alzheimer’s and Parkinson’s. As a result, redox homeostasis has been a key point of interest in current research. Redox homeostasis is the balance between electrophiles and nucleophiles in a system, more importantly in a biological system. These…

Catalase?”) This experiment involved both of these two aspects. It was inferred before the experiment began that if the potato is placed in hydrogen peroxide at room temperature, then it will produce the most bubbling activity. The reason that the potatoes produced a bubbling activity is because hydrogen peroxide is an example of a catalase. Hydrogen peroxide is a chemical compound with the formula H2O2. It is made of 2H2O which is water, and Oz which is oxygen. (Corsini, "What Is a…

Hemoglobin has a peroxidase-like activity, meaning that it will break down hydrogen peroxide, or other organic hydroperoxides. This makes it useful in forensics, since you can test for the presence of hemoglobin simply by dropping hydrogen peroxide on it. Of course, there are a lot of things that have peroxidases in them, so this is a presumptive test for the presence of blood. Blood cells are not immortal; each cell wears out in about four months, and will disintegrate in the blood stream,…

variety of biological processes to take place. Specifically, they promote the oxidation of various compounds using naturally occurring peroxides, especially…

The effect that temperatures at 4°C, 23°C, 32°C, and 48°C , pH 3, 5, 7, and 9, the boiled extract, and hydroxylamine had on the peroxidase enzyme extracted from Brassica rapa. Emma O’Donoghue Fundamentals of Biology I Lab Professor William Olsen October 8, 2015 Abstract The purpose of this lab was to determine the effects that a number of factors had on enzyme activity. The enzyme used during this lab was peroxidase, which was extracted from the organism Brassica rapa. The…

The crude extract containing a catalase, catalyse a reaction where the substance is simultaneously oxidized and reduced, giving two different products of H2O to O2 and H2O. This reaction was measured by UV-Vis spectroscopy which results a decrease in absorbance at 240nm. The decrease in absorbance was caused by the loss of H202 in a product. The catalase enzyme was purified by the 5 – step procedure using a sodium phosphate buffer and a DEAE- Sepharose column which is mainly used for protein…

Hydroponic Food Production Introduction Since ancient times human beings have learned to work the earth in order to survive. With the pass of time humans have developed different ways to improve productivity when cultivating plants. This is particularly important with the increase in human population, lost farm lands and climate changes. (Arteca) Currently there are a couple of different methods to cultivate plants. Even thou Although all of them have the same objective of generating…

apply it to the wet part of the strip. Observe for any color change within 15 seconds and interpret the results. The catalase test was performed using the slant that was the source of the inoculum used for the oxidase test. A drop of 3% hydrogen peroxide was added to the said slant and the tube was observed for any…

For reactions with a medium, or “one to one”, ratio of iron (II) to hydrogen peroxide, the generation of hydroxyl radicals is also observed. In this particular ratio, the presence of organics does not seem to inhibit the effectiveness of the iron catalyst, as all the iron (II) was converted to iron (III) in a series of experiments. Without the organics present, the hydrogen peroxide reformed by reacting slowly with iron (III) to produce ferric salts, which then degrade into more hydroxyl…