Oxygen mask

TRIS Hcl, NBT, NADH, Ethanol, PMS, l-ascorbic acid 1. The superoxide radicals is generated in 3 ml of TrisHCl buffer (16 mM, pH 8.0) containing 1 ml of NBT (50 μM), 1 ml NADH (78 μM) and ethanol extract of sample (25 – 50 μg). 2. The reaction was started by adding 1 ml of PMS solution (10 μM) to the mixture. 3. The reaction mixture was incubated at 25° C for 5 min, the absorbance was read at 560 nm using a spectrophotometer (Schimadzu UV-Vis 1700) against blank samples using l- ascorbic acid…

Salts and molecules have similar characteristics, and many differences whether we can tell by first looks or not. Testing these two only supports the differences, and many structural functions cause these differences. Since salts are ionically bonded, they have different properties and functions compared to the covalent bonded molecules. Salts have a ionic bond, and we can confirm due to their electronegativity. As you move from left to right on the periodic table you would notice that…

though it is called stainless steel, it is not entirely stainless, because in low-oxygen, high salinity environments it is able to be stained. The main difference between stainless steel and general carbon steel is the amount of chromium present. Due to the amount of chromium that stainless steel contains, the stainless steel will form a chromium oxide film which will help prevent corrosion as it blocks the oxygen fusing to the surface of the steel and in turn blocks it from spreading to the…

The unique composition and purity of as-deposited SnS2 thin films prepared with different precursor solution volumes from 5 ml to 25ml were determined by EDX analysis as shown in fig 5, which brought out the presence of Tin and Sulfur as elementary components. Two different peaks were observed in the spectrums from fig 5 relevant to the tin and sulfur. The EDX spectra show that the weight percentage for the film prepared at the precursor solution volume of 5 ml is 36.8% and 63.2%, which is…

EXECUTIVE SUMMARY Natural skin care is the care of the skin by applying naturally-adopted ingredients mixed with naturally occurring carrier. Agents, preservatives, surface-active agents, humectant and emulsifiers. The classic interpretation of natural skin care is established on using botanically procured ingredients currently existing in nature or is cultivated by nature, without the use of fabricated chemicals, and assembled in such a way to preserve the integrity of the ingredients. Skin…

Combustion, a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame. The hydrocarbons become harder to ignite as the molecules get bigger. Combustion of alkanes with bigger molecule will produce more soot as the percentage of carbon of the molecule is higher. The amount of soot produced depends on the percentage of carbon in a hydrocarbon molecule. Hexane and cyclohexene produced very small of light soot…

Chotukool is a 45-liter plastic holder that can cool nourishment to around 8 to 10 degrees on a 12-volt battery. Forsaking the compressor innovation utilized as a part of local ice chests, it utilizes a thermoelectric or robust state cooling framework. It doesn't have a front opening entryway however opens from the top to guarantee that the greatest measure of cool air stays in the compartment when opened. The thought of Chotukool was conceptualized focused around the standards of Disruptive…

Magnesium Alloy: Microstructure Characteristics: Fig (8) : Shows the microstructure of Magnesium alloy. Picture source: http://www.omicsonline.org/JMSTimages/2155-9589-2-114-g001.html Magnesium alloys have a hexagonal lattice structure. They are the lightest of all structural metals. Magnesium alloys possess a low galling tendency as a bearing surface in conjunction with shaft hardness above 400…

Question 1 When first looking at the title and subtitle for Ray Bradbury's book, Fahrenheit 451, as well as the illustration that is depicted on the cover of my hardcopy, I thought that this book would feature higher-than-normal temperatures, fires, and burning as story elements. The title reads like a fancy way of saying four-hundred-fifty-one degrees Fahrenheit, and when combined with the fiery subtitle, which details more specifically that this is “the degree at which paper catches fire and…

B.Result and discussion Percentage air voids On the replacement of cupola slag we obtained the result that, on the percentages of 10, 20, 30 and 40 we have the Va values of 4.8, 4, 4.8 and 3.2 % which satisfies the morsth requirement of 3-5% and further we observed that the gradual decrease in the Va values up to 100%. So that for Va the replacement of cupola slag up to 40 % will satisfies the morsth requirement. Percentage of voids in mineral aggregate On the replacement of cupola slag we…