Ethylene

Chemically, polyester (or many esters) is primarily a family of polymers wherein the monomers belong to the category “esters”. The most commonly used polyester is the polymer of diglycol terephthalate and is called polyethylene terephthalate (PET). Nylon is a group of polymers, which can be classified as polyamides. Today several types of nylon are produced with properties tuned to meet customer specifications. The most commonly used ones are nylon-6 (which is manufactured from caprolactam) and…

The corporation and the food industry —consisting of factory farms— are directly responsible for the exploitation of workers and the public health and dietary crisis in America. Jim Hightower and Michael Pollan do an outstanding job exposing the lies behind the industries and revealing the truth to the consumers. The way our food industry has shifted has negatively impacted our society. Big corporations are running thousands of people out of jobs and treating their own employees unfairly and…

The materials in Starbucks coffee can be divided into two categories: the cup and the coffee. In terms of coffee, a report from the company in 2016 noted that 99% of their coffee was now ethically sourced; moreover, the company has made it clear that they would like 100% of their coffee to be ethically sourced in the near future (Starbucks, 2016, p.20). Ethically sourced means that the farmers who grow the coffee beans are given pay that is fair, and that their coffee beans are taken from…

PRODUCTION Formaldehyde is known to be one of the most reactive organic compounds. It can be produced by various reactions. It can produced by methods such as: Methanol undergoes an oxidation reaction in the presence of catalysts, ethyl-alcohol, coal gas, ethylene, methane, glycol, glycerin, and carbon…

Even though there are many negative effects of technology, there are also a lot of positive effects! These positive would include the improvement of communication and availability of information. We have more ability to research and experiment. We are able to resolve more medical issues and have created devices that can keep the body working and we have better treatment options. Technology has also improved education and has increased efficiency and productivity. The only reason technology has…

and packaged, primarily by women labourers…[then] boxes are transported by road or rail to the port where they are shipped in energy-intensive refrigerated units, to prevent ripening…On arrival, bananas are artificially ripened using the chemical ethylene and a gradual rise in temperature in specialist warehouses… They are then transported, primarily by road, directly to retailers or wholesalers who then…

As macromolecular machines, enzymes conduct their designated work in the confined and crowded spaces inside living cells. How does a protein work in such a condition? Functions of proteins are strongly dependent on their structural stability and dynamics while the (macro) molecular interactions are arguably affected by the complexity and diversity of their environments. To date, two interrelated cellular conditions — ‘macromolecular crowding’ resulted from the effect of volume exclusion by…

All animals used in this experiment were purchased from Harlan Sprague Dawley, Inc. (Indianapolis, IN, USA). The animal procedures are approved by the Animal Care and Use Committee of East Tennessee State University, as well as complied with the NIH Guide for the Care and Use of Laboratory Animals. These animals were housed on a 12:12 h light cycle (lights on at 07:00 a.m.). Water and food were provided ad libitum. Rats were randomly assigned to different experimental groups after living an…

Cellulose derivatives The cellulose derivatives widely used in mucoadhesive formulations are hydroxyethylcellulose, hydroxylpropylmethylcellulose, hydroxypropylcellulose and carboxymethylcellulose etc. • Hydroxylpropylmethylcellulose (HPMC): Hydroxylpropylmethylcellulose is semi synthetic, inert, viscoelastic polymers, extensively used not only for mucoadhesion properties but also for its controlled release mechanism. It has been applied to deliver various drugs via different type of dosage…

Plastics are a material currently being used all around the world. As the production of this synthetic polymer has increased, it has become almost impossible to completely avoid interaction with a plastic material. With the discovery of this practical material, positives and negatives were discovered too. Plastics have a strong effect on the environment and human health. During manufacturing, additives are put in that can be harmful to each of these important aspects. Due to their synthetic…