Essays Tagged: "chemical reactions"

Biology AT1 on the affect of hydogen peroxide on the liver

ich is found in the liver' Introduction: Enzymes are biological catalysts. They speed up the chemical reactions which go on inside living things. Without them the reactions would be so slow tha ...

(2 pages) 51 0 4.5 Jan/1996

Subjects: Science Essays > Biology > Human Biology

Chemical reactions

Chemical reactions are the heart of chemistry. People have always known that they exist. The Ancient ... in the Seventeenth Century, a German chemist named Georg Ernst Stahl was the first to postulate on chemical reaction, specifically, combustion. He said that a substance called phlogiston escaped into ... ry Antoine-Laurent Lavoisier, in France, discovered an important detail in the understanding of the chemical reaction combustion, oxigine (oxygen). He said that combustion was a chemical reaction invo ...

(8 pages) 210 0 4.1 Mar/2002

Subjects: Science Essays > Chemistry

Role of Catalyists in Industry

nation - Advanced LevelChemistry (Salters') - Paper 3 mock.ROBERT TAYLOR U6JW.THE ROLE CATALYSTS IN CHEMICAL REACTIONS, THEIR IMPORTANCE IN INDUSTRY,PROBLEMS AND NEW DEVELOPMENTS.A Catalyst is a subst ... tion. The processis called catalysis. In this report I aim going to explain the role ofcatalysts in chemical reactions and their importance in industry.I will also outline the problems associated with ...

(4 pages) 50 0 4.0 Oct/1996

Subjects: Science Essays > Chemistry

The Exiting World of Water

hydrates. Water also reacts with metal oxides to form acids. It actsas a catalyst in many important chemical reactions.OccurrenceWater is the only substance now known to man, that can occur atordinary ... f living cells, consists of a solution in waterof fats, carbohydrates, proteins, salts, and similar chemicals.Water acts as a solvent, carrying, joining ,and chemically breakingdown these substances.T ...

(2 pages) 41 0 4.3 Dec/1996

Subjects: Science Essays > Biology

Sequence of Chemical Reactions

Laboratory #8 The Sequence of Chemical ReactionsDrew SelfridgeDave Allen, Lab partnerInstructor YangFebruary 11, 1997INTRODUCTIONT ...

(2 pages) 39 0 4.4 Feb/1997

Subjects: Science Essays > Chemistry

Examining Some Properties of the Enzymatic Reaction

In this experiment a deeper meaning in the catalysts of reactions is studied. Catalysts accelerate chemical reactions without permanently changing the reaction. Enzymes, catalysts in biochemical reac ...

(3 pages) 62 0 4.6 Dec/2002

Subjects: Science Essays > Biology

Outline for Dalton and his work in Chem(outline only).

on's Atomic Theory*Matter consists of definite particles called atoms.*Atoms are indestructible. In chemical reactions, the atoms rearrange but they do not themselves break apart.*The atoms of one par ... e up a compound, you can find it out by looking at the compound's molecular weight. Finally, when a chemical reaction occurs, the atoms themselves aren't altered in any way. Instead, they are just rea ...

(3 pages) 66 1 3.0 May/2003

Subjects: Science Essays > Chemistry

A essay describing the faults and flaws in evolutionary theory and the alternative explantion. Titled: "Can Evolution Explain Anything?"

other hand, are not willing to admit to the possibility that everything was created and advanced by chemical reactions and genetic mutations. There is a standstill on the front lines of this critical ... rich organic soup. These basic elements underwent, through the superheating ability of lightening, chemical changes. These changes caused the elements to go from just elements to organic material. Th ...

(10 pages) 134 1 4.5 May/2003

Subjects: Social Science Essays > Political Science

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

Basic Facts About Iron.

ch small concentrations in other rocks, however, that it cannot be used economically for mining.The chemical element iron is the fourth most common element in the Earth's crust and the second most abu ... e second most abundant metal. Its chemical symbol, Fe, is taken from the Latin word ferrum.Metal is chemically active and is found in nature combined with other elements in rocks and soils.In the Eart ...

(3 pages) 43 0 3.0 Nov/2003

Subjects: Science Essays > Environmental Science

Chemical reations is an essay on chemical reactions in Chemistry.

Chemical ReactionsChemical reactions are the heart of chemistry. People have always known that they ... in the Seventeenth Century, a German chemist named Georg Ernst Stahl was the first to postulate on chemical reaction, specifically, combustion. He said that a substance called phlogiston escaped into ... ry Antoine-Laurent Lavoisier, in France, discovered an important detail in the understanding of the chemical reaction combustion, oxigine (oxygen). He said that combustion was a chemical reaction invo ...

(8 pages) 124 2 4.5 Nov/2003

Subjects: Science Essays > Chemistry

A very brief history of chemistry. Includes important scientists and their contributions to the advancement of chemistry.

s far differently. Lavoisier paid particular attention to the weight of the ingredients involved in chemical reactions and of the products that resulted. He found that the weight of the products of co ... onomer and mathematician, also carried out experiments demonstrating that respiration in animals is chemically similar to combustion. Their studies of the chemical processes of living organisms were a ...

(3 pages) 10488 0 2.3 Nov/2003

Subjects: Science Essays > Chemistry

Magnesium.

r Humphrey Davy in 1808. Humphrey is known for his research of reactions with electrical energy and chemical reactions. Magnesium is the light weight metal that doesn't change under normal conditions. ...

(2 pages) 33 0 2.2 Jan/2004

Subjects: Science Essays > Chemistry

To investigate the effect of surface area on the rate of reaction using the enzyme Catalase, found in potato, and the substrate Hydrogen Peroxide.

INTRODUCTIONEnzymes are biological catalysts that speed up chemical reactions, without being used up or changed. Catalase is a globular protein molecule that i ... ect enzyme activity.Temperature - The temperature is partly responsible for how slow or how fast as chemical reaction takes place. If you increase the temperature, the faster the molecules move. This ...

(11 pages) 78 0 4.2 Feb/2004

Subjects: Science Essays

Atoms, Molecules and Chemical Reactions

Atoms, Molecules and Chemical ReactionsMatter is anything that has mass and takes up space. Matter is made up of atoms an ... r like magnets. Charged atoms are called ions, and this kind of combining is called an ionic bond.A chemical formula gives the symbol for each kind of atom and tells you how many of them are used to j ... t the same material as either of the original atoms. The new substance has its own new physical and chemical properties. Under certain circumstances the molecule can be broken apart and rearranged to ...

(2 pages) 53 0 3.9 Feb/2004

Subjects: Science Essays > Chemistry

College lab report on enzymes

Lab Ex#8: "Enzymes: Catalysts of Life"INTRODUCTIONEnzymes are protein organelles where chemical reactions take place to generate energy within our cells. Without the energy produced from ... of temperatures and to determine if an enzyme having similar characteristics will perform the same chemical reaction.PROCEDURE1. Formation and Detection of Benzoquinone:- Stations were set up having ... - We were also to propose a hypothesis. Our hypothesis was that tube 2a would present the strongest chemical reaction, and that tube 2b and 2c would react, however slightly.- Following a five-minute i ...

(5 pages) 368 0 3.2 Feb/2004

Subjects: Science Essays > Physics

Describe The Roles of Water in Living Organisms

in many aspects of both plant and animal lives. These aspects include temperature control, support, chemical reactions, transport and protection.Without the ability to control our temperature, we as h ... eye; the aqueous and vitreous humours, made up mostly of water, help the eye to maintain its shape.Chemical reactions are occurring constantly, in fact without them both animal and plant life would c ...

(4 pages) 33 0 3.0 Mar/2004

Subjects: Science Essays > Biology

Chemisty review on mass/matter and seperating mixtures

rie-Calorimeter- device used to measure heat movements-Fossil Fuels-coal, petroleum, natural gasII- Chemical reactions - law of conservation of energy- matter cant be created nordestroyed.-Reactant- l ...

(1 pages) 30 0 4.3 Mar/2004

Subjects: History Term Papers > North American History

Lechuguilla cave

, the huge gypsum deposits lining the walls convinced geologists that the cave was formed by strong chemical reactions between ancient groundwater and hydrogen sulfide rising from an underground sourc ...

(1 pages) 18 0 5.0 Mar/2004

Subjects: Science Essays > Earth Sciences

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