Essays Tagged: "Polymer"

How nutrients get in, and wastes get out.

one of the main nutrients needed for cellular respiration to occour. Starch is a large molecule, a polymer of glucose. Dextrin and maltose are intermediate products in the digestion of starch. Some f ... de such as glucose, is present in food. These monosaccharides do not require digestion.Proteins are polymers composed of one or more amino acids. When they are digested, they produce free amino acids ...

(7 pages) 267 2 4.4 Dec/1996

Subjects: Science Essays > Biology > Human Biology

This essay is about how photocopiers work and how chemistry is involved in the process.

ng time in coming. The first photocopy, made of moss spores, gave way to several different types of polymer infused toners. The use of this innovation has allowed not only cheap, clean copies, but als ... Institute he was able to make several improvements. One such improvement was the incorporation of a polymer into the toner in order to fuse the pigment to the paper. The rights were eventually sold to ...

(9 pages) 56 0 4.4 Dec/2003

Subjects: Science Essays > Chemistry

Essay about a new, "nature friendly" plastic. pics of process can be found at www.newscientist.com

he concept is not entirely new. "The British chemicals company ICI started making the biodegradable polymer (PHB) about 10 years ago. Although popular, PHB was 10 times as expensive as standard polyme ... number of acids available to the bacteria was altered causing it to create "a tougher biodegradable polymer (PHBV)".Yu says that his method works on approximately a ¼ ratio. For every 100kg of ...

(2 pages) 35 0 4.6 Dec/2003

Subjects: Science Essays > Biology

Project on the Chemistry of Hairspray. Includes bibliography, chemical structure, ingredients, how it works, and a reflection on the project.

26ie%3DUTF-8%26sa%3DNOverall, I have learned a lot about hairspray. I now understand that it is the polymers that attach to the hair follicle. The compounds which cause "sticky" feeling which the actu ... icky" feeling which the actual spray have, mostly the alcohols, end up evaporating. This leaves the polymers to coat the hair, and provide the "hold".The chemistry of hairspray deals quite a bit with ...

(4 pages) 65 0 4.0 May/2004

Subjects: Science Essays > Chemistry

Polymerization of Composite Resins: Dental Chemistry

sed in dentistry, are compounds composed of three separate agents that act together to form a rigid polymer.The three agents that act together to form the polymer include, an organic resin matrix, ino ... s-GMA, or bisphenol A glycidyl methacrylate. This aromatic methacrylate is considered to be a rigid polymer because of the benzene rings near its center, and also provide specific sites for free radic ...

(4 pages) 36 0 5.0 Feb/2005

Subjects: Science Essays > Chemistry

The Plastics Industry

first is the acquiring of the raw materials. The monomers, simple compounds of carbon that make of polymer chains, are obtained from petrochemicals. These petrochemicals are widely available and tend ... lable and tend to be cheaper than other raw materials. The second step is synthesising of the basic polymers that have been created from the monomers. This can be obtained through addition or condensa ...

(4 pages) 44 0 3.0 Mar/2006

Subjects: Businesss Research Papers

General Features of Protiens

A protein is a unique three dimensional biological polymer constructed from 20 different monomers called amino acid. Some of amino acids are glycine, a ... e bond which links the amino group of one amino acid with the carboxyl group of another, yielding a polymer of amino acid called polypeptide. The polypeptide varies greatly in length from a few to tho ...

(2 pages) 16 0 0.0 Apr/2006

Subjects: Science Essays > Biology

Plastic - A Boon or A Bane

f plastic.The term "plastics" covers a range of synthetic or semi-synthetic organic condensation or polymerization products that can be molded or extruded into objects or films or fibers. They consist ... ucts that can be molded or extruded into objects or films or fibers. They consist of long chains of polymers. Their name is derived from the fact that in their semi-liquid state they are malleable, or ...

(2 pages) 27 0 3.8 May/2006

Subjects: Science Essays > Chemistry

Unknown Polymer Identification

Unknown Polymer Identification By Amar Singh Abstract The main purpose of this experiment is to find out the ... dentification By Amar Singh Abstract The main purpose of this experiment is to find out the unknown polymer to be used to replace a machine part. The main experimental procedure is to compare the unkn ... ce a machine part. The main experimental procedure is to compare the unknown polymer with the known polymers available in the organization and thus conclude which unknown matches the most with the giv ...

(2 pages) 1669 0 0.0 Sep/2001

Subjects: Science Essays > Chemistry

Polymers

In this report I am going to try and tell the readers of this report what exactly a polymer is and how we use them in everyday life. So in order to start out I must give you a history ... must give you a history of polymers, and the scientist who created them.First off what exactly is a polymer? The answer to this question is fairly easy to put into words. A polymer is a large molecule ... nto words. A polymer is a large molecule of high molecular mass, formed by the joining together, or polymerization, of a large number of molecules of low molecular mass. The individual molecules formi ...

(6 pages) 48 0 3.0 Nov/2001

Subjects: Science Essays > Chemistry

Corporate Profile Company Name: DuPont Canada Inc. Web address: http://www.dupont.ca/IR

62 Primary Industry Sector: Nylon Enterprise (35 per cent of total sales), Performance Coatings and Polymers (23 per cent of sales), Specialty Fibres (10 per cent of sales), Specialty Materials (14 pe ... Specialty Fibres (10 per cent of sales), Specialty Materials (14 per cent of sales), and Specialty Polymers and Films (18 per cent of sales).Main Product: Nylon Chief Executive Officer: Dave W. Colcl ...

(1 pages) 392 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Core 1 Notes: Production of Materials

150oC, to form vinyl chloride (chloro-ethene)Identify that ethylene serves as a monomer from which polymers are madeEthylene is the monomer which is converted into the polymer polyethylene by the pro ... are madeEthylene is the monomer which is converted into the polymer polyethylene by the process of polymerisation (chemical reaction where many small identical molecules join together to form one lar ...

(16 pages) 34 1 4.0 Nov/2008

Subjects: Science Essays > Chemistry

OS Recommendation for Riordan Manufacturing

Recommendations15References16AbstractRiordan Manufacturing, a premier manufacturer and supplier of polymer-based products, seeks to upgrade its server-side and client-side operating system with Micro ...

(16 pages) 95 0 0.0 Feb/2009

Subjects: Science Essays > Technology

Polycarbonate Vs. Acrylic

icIn this report I will thoroughly discuss the chemical properties, makeup and effectiveness of the polymers polycarbonate and acrylic. I will evaluate the current use of each and conclude which is be ... better and more efficient in various situations. To understand this topic, a full understanding of polymers is required.A polymer is more commonly referred to as a plastic. The simplest definition of ...

(4 pages) 2555 0 3.0 Apr/2009

Subjects: Science Essays > Chemistry

Plastic Recycling

ne the structural form of the plastic as well as their physical feature. Plastics are also known as polymers or resins.A polymer is a large molecule of high molecular mass formed by the joining togeth ... ther of a large number of molecules of low molecular mass (2). The individual molecules forming the polymer are called monomers. Polymers can be divided into 2 categories; extendable polymers and cros ...

(11 pages) 23 0 0.0 Nov/2009

Subjects: Science Essays > Chemistry

Polyethylene

, there are still two free valence electrons at each end of the chain for joining other monomers or polymer chains. This is process is called polymerization ("Polymer Structure", n.d). Since LDPE is p ... ("Polymer Structure", n.d). Since LDPE is produced at extremely high pressures, this high-pressure polymerization created polyethylene with many branches; the branches are created due to intermolecul ...

(5 pages) 2 0 0.0 Nov/2012

Subjects: Science Essays > Chemistry