Essays Tagged: "chemical processes"

The Theory of Evolution

Biologists agree that all livingthings come through a long history of changes shaped by physical andchemical processes that are still taking place. It is possible that all organismscan be traced back ... cur spontaneously, but they may be induced by some externalstimulus, such as irradiation or certain chemicals. The rate of mutationin humans isextremely low; nevertheless, the number of genes in every ...

(12 pages) 419 2 4.0 May/1996

Subjects: Science Essays > Biology

How Amylase Digests Starch.

IntroductionEnzymes are proteins that are involved in all the chemical processes in living things. As they are made of proteins they are affected by pH and temper ... are made of proteins they are affected by pH and temperature. Enzymes are catalysts; they speed up chemical reactions without being changed themselves. Digestive enzymes speed up the breakdown of lar ...

(3 pages) 40 0 0.0 Jul/2003

Subjects: Science Essays > Biology

Summary notes for the updated syllabus 2004-2005, Blueprint of life and Maintaining a balance.

Characteristics of enzymes:"XAre made up of proteins"XAre catalysts, as they speed up the rate of chemical reactions."XRemain unchanged at the end of the reaction."XAre needed in only small amounts. ... organic catalysts. A catalysts is a general term for any substance that speeds up or brings about a chemical change without itself being used up in the reaction.They control all the chemical processes ...

(4 pages) 39 0 4.5 Apr/2004

Subjects: Science Essays > Biology

Venus The paper is a study of comparative planetology. The attributes of Venus are compared against the planet Earth.

s is one of many planets in our solar system. Its geologic features are the product of physical and chemical processes that operate elsewhere in the universe. In many ways Earth and Venus are very sim ... . We will look at and explain Venus' characteristics or properties. The properties will cover size, chemical compositions, rotation and atmosphere, as well as phases.Venus PropertiesThe planet Venus i ...

(7 pages) 157 1 3.9 Jun/2004

Subjects: Science Essays > Astronomy


Metabolism is the countless series of chemical reactions that take place continuously within an organism, allowing it to live. It includes ... ge of even one vitamin can slow down your metabolism.The body's metabolism is governed by hormones (chemical messages secreted by the glands of the endocrine system) and the nervous system. The rates ... Temperature.For every 0.5 deg C increase in body temperature, the BMR increases by about 7 percent. Chemical reactions in the body actually occur more rapidly at higher temperatures; so a patient with ...

(7 pages) 105 0 4.3 Aug/2005

Subjects: Science Essays > Biology > Human Biology

Food Myth: Are soy products really a healthy alternative?

c acid. To remove the toxins from the soybeans, the soybeans need to be placed through an intensive chemical process which consists of treating the soybeans with many chemical washes and high heat tre ... many chemical washes and high heat treatments. By removing the toxins found in soybeans with these chemical processes, the protein found in the original soybean becomes denatured and therefore making ...

(1 pages) 15 0 0.0 Mar/2006

Subjects: Humanities Essays > Health & Medicine

Ginger beer -temperature vs. alcohol content

umulus lupulus plant), and brewing yeast (Saccharomyces cerevisiae)--initiate myriad biological and chemical processes, including enzymatic digestion, fermentation, and isomerization, which must be ha ... pes of alcohols; the standard type for wines and beers is ethyl alcohol or ethanol. Ethanol has the chemical formula C2H5OH. The production of Ethanol by fermentation of grain and fruit is one of the ...

(9 pages) 19 0 0.0 Sep/2006

Subjects: Science Essays > Chemistry

A Thorough Description of Chromatography

all know about the processes of Decantation, Evaporation, Sublimation, Extraction etc. All of these chemical processes are considered the basic techniques in performing a scientific research. But ther ... ionary bed. It is a method for analyzing complex mixtures (such as ink) by separating them into the chemicals from which they are made. Chromatography is used to separate and identify all sorts of sub ...

(10 pages) 53 0 3.0 Oct/2006

Subjects: Science Essays > Chemistry

This is a science lesson plan on eukaryotic cells for all of you soon to be teachers. It is using The Madeline Hunter Model for lesson planning.

y among organisms becomes apparent from an analysis of internal structures, the similarity of their chemical processes, and the evidence of common ancestry.LS5b.Biological evolution accounts for the d ...

(2 pages) 40 1 3.7 Jun/2007

Subjects: Social Science Essays > Education

Human Resources for Axia College

nt Plan and Job AidsHRM 2Final Project:Human Resources Management Plan and Job AidsExecutive SummaryChemical Engineering has contributed to the development of product and processes in many areas of gr ... o the development of product and processes in many areas of great socioeconomic impact, such as the chemical, food, and pharmaceutical industries, as well as in key areas of infrastructure such as ene ...

(3 pages) 126 0 3.0 Aug/2007

Subjects: Businesss Research Papers > Management > Human Resource Management

Catalyst - Preparation and Characterization

Catalysis is of importance to today's chemical industry. There are only a small number of chemical processes that are still conducted with ... ture.2. IntroductionDefinition of catalyst is, ‘A substance that increases the rate at which a chemical reaction approaches equilibrium without itself being permanently involved in the reaction . ... r carrier, and3.promoters2.1.1 Active ComponentsActive components are responsible for the principal chemical reaction. Selection of the active component of the active component is the first step in ca ...

(22 pages) 33 0 5.0 Apr/2008

Subjects: Science Essays > Engineering > Chemical Engineering

Gold mining notes

nclude panning, long toms, etc. The mechanical techniques consist of drilling, hydraulics, and many chemical processes; one being the use of the Cyanide Leach process.Gold has been used since prehisto ... s very ductile and malleable; it is easily beaten into thin sheets of gold leaf. Gold is relatively chemically inactive, making it unaffected by moisture, oxygen, and many acids. Gold can be found in ...

(8 pages) 2144 0 0.0 Mar/2009

Subjects: Science Essays > Engineering > Chemical Engineering

An investigation in to the distribution of catalyse in different plant tissues

rt of the nitrogen molecule to reactive nitrogen atoms). Hydrogen peroxide is produced during these chemical processes and must be removed to prevent damage to cellular structures. If hydrogen peroxid ...

(5 pages) 3292 0 3.0 May/2009

Subjects: Science Essays > Chemistry

Plastic Recycling

tic and cross-linked polymers are thermoset. Both groups differ in their structure, properties, and chemical processes (1). The most important difference between both is that thermoplastic can be reme ... uch as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur" (5). It is also produced from petrochemicals such as oil and natural gas. Polymers are a long chain of atoms that are produced by synth ...

(11 pages) 23 0 0.0 Nov/2009

Subjects: Science Essays > Chemistry