Ester

Steroid esters, which are nonpolar, are oil-soluble, and are just put into oil based solutions. Steroids without esters are just put into water to be injected, not soluble, and sit as a suspension in the water. Oil based injections are preferred as they last longer and require less injection. After injection, the steroids stay in the body/bloodstream for a couple days. The time varies a lot, as oil based and water based injections last for different times in the bloodstream - esters are…

are mixed it causes a reaction that produce peroxy acid ester and phenol. Peroxy acid can spelled as one word or be called peracid. It is an acid that contains OOH group. The Peroxy acid ester decompose into carbon dioxide (which is a gas that is part of the air we breathe). Phenol is a poisonous crystalline acidic that presents itself as tars of coal and in wood. In dilute solution it is use as an disinfectant. When the peroxy acid ester and phenol mix it releases energy that excites atoms in…

Polymer - A word, which is connote for large molecules (that a molecule made from simple repeating units called monomers). The monomers are main building block of polymers. Polymers play an essential and ubiquitous role in everyday human life because of the extraordinary range of properties. Polymers are among the most widely used and important type of materials today. Polymers have been with us from the beginning of time; they form the very basis (building blocks) of life. Animals, plants all…

usually used around Halloween, New Year’s, or at parties. There are three factors that make up the glow stick. In a glow stick, one of the chemicals is often hydrogen peroxide and the other active ingredient is a harmless chemical named phenyl oxalate ester. The chemical reaction between these two substances produces enough energy to make light, but it doesn't create enough energy to make heat or explosions. There also need to be dye in a glow stick. The glow stick gets color when the energy…

Vitamins and minerals are both essential nutrients that are needed by the body. Different from the macronutrients, they are said to be micronutrients by meaning that they are needed only in small amounts. Nevertheless, we should not forget about their essentiality and their importance in our daily diet1. There are two types of vitamins, fat-soluble and water-soluble. Fat-soluble vitamins include vitamin A, vitamin D, vitamin E and vitamin K. They are found in fatty foods and animal products like…

Microwave (MW) assisted Esterification of Benzoic Acid (BA) offers the advantage of transformation of energy and heating throughout the volume efficiently in a shorter period and eliminates the use of excess solvent, during the course of reaction. The present study aims to assess the conversion and selectivity for the production of methyl benzoate compounds by esterification of benzoic acid using microwave irradiation. Effects of operating parameters such as reaction time, feed composition,…

p-aminobenzoic acid. A transfer of a proton from one oxygen atom to another yields a second tetrahedral intermediate and converts the OH group into a good leaving group. Loss of a proton and expulsion of H2O regenerates the acid catalyst and gives the ester product. In the presence of H2SO4, NH2 forms a…

Purpose: The purpose of this laboratory was to synthesize isopentyl acetate, commonly known as banana oil, in a reaction of methanol and isopentyl alcohol catalyzed by sulfuric acid. Through this Fischer esterification reaction, it was possible to learn about using a Reflux condenser to run a reaction as well as purifying the product through various washes and extractions along with simple distillation. In addition, the product of the experiment was carefully analyzed based upon boiling point,…

has qualities of low warmth, non-absorbent, dries quickly, durable, very easily to care for, crease resistant and can be recycled. (Insert citation) Polyester is constructed of having many esters joining together. An ester is a condensation product between an organic acid and alcohol. (Diagram of single ester and…

Ester Johnson. It was as if the world, and everything else had stopped. Augustine could not believe what she had heard. For the first time since shortly after her birth, she now faced facing with the woman she had thought she would never get the opportunity to met. Ester would then slowly fly toward her daughter smiling. Augustine who was still in much shock stood there frozen, not knowing what to do, As Ester continued to approach her tears began to fall…