Science
The scientific world contains a wealth of knowledge that enables mankind to live the way it does. EssaysForStudent.com can help you close the gaps in your knowledge.
4,609 Essays on Science. Documents 1,471 - 1,500
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Environmental Issue: Tropical Rainforest Deforestation
In all rainforest regions in the world, deforestation has become a major problem. The rainforest is arguably the most complicated and largely interwoven ecosystem on land. However, this treasure is being lost and demolished day by day, the land being cleared away for the pure interest of money making, in the process of deforestation. Not only are thousands of species of organisms being driven to extinction, but we are also effectively eliminating any chance
Rating:Essay Length: 1,696 Words / 7 PagesSubmitted: November 17, 2009 -
Environmental Issues in China
As our population is growing, when we are taking it for granted to ask the nature for resource we want, environmental protection is becoming more and more important and necessary. Water protection is especially urgent now. We can see the water pollution is becoming worse. In this essay, I am going to talk about the recent situation of the water pollution, the bad effects of it and some ways help to solve the problem as
Rating:Essay Length: 1,194 Words / 5 PagesSubmitted: March 5, 2010 -
Environmental Threats to Southeast Asia
Environmental Threats to Southeast Asia Southeast Asia has been a location ripe for economic gain and has been looked upon by the western world with a certain gleam in their eye. Ever since the days of Marco Polo and Columbus there has been a desire to profit from the abundant and diverse resources of the Indies. Today, that desire has led this region of the world into a perilous downward spiral that could jeopardize the
Rating:Essay Length: 1,585 Words / 7 PagesSubmitted: January 29, 2010 -
Environmental Values
The word "value" means worth. It also refers to an ethical precept on which one base their behavior. Values are shaped by the culture in which individuals live and by our experiences. However, there are values that are held high by most cultures. These include fairness and justice, compassion and charity, duties and rights, human species survival and human well-being. Environmental Values brings together contributions from philosophy, economics, politics, sociology, geography, anthropology, ecology and
Rating:Essay Length: 1,366 Words / 6 PagesSubmitted: March 14, 2010 -
Envs200 Lead Research
Jenelle Dennis Joanne Dittersdorf Envs 200:001 10 December 2018 I choose to talk about lead in children and in adults and what causes lead to get into your blood. Lead is a natural thing found deep in the ground, it doesn’t always come in large amounts. Lead can and will start in small portions in or along with other elements. For example, copper zinc per silver. You may not even know but lead is all
Rating:Essay Length: 1,076 Words / 5 PagesSubmitted: April 29, 2019 -
Envst
Community Involvement #1 Growing up, my family was known for being as environmentally friendly as possible. One of my jobs at home was to make sure to bring out anything recyclable and sort the recyclables into their proper place. We found so much to be recyclable, if you were to drive down our street before the day when recycling was collected, you would guess there were 7-8 people living in our 4 person home. When
Rating:Essay Length: 275 Words / 2 PagesSubmitted: March 27, 2010 -
Enzymatic Activity
Abstract: The objective of this lab was to determine the effects of certain variables on enzymatic activity and to get a quantitative feel for the effectiveness of a certain enzyme, in this case peroxidase obtained from potatoes. In order to do this, we conducted experiments in which the effects of boiling and inhibitors were examined by comparing normal enzymes to those affected by the factors being tested. Using a spectrophotometer, we analyzed the absorbance levels
Rating:Essay Length: 1,234 Words / 5 PagesSubmitted: June 1, 2010 -
Enzyme
Examination of the Effects of Inhibitory and Non-Inhibitory Competition, Enzyme-Substrate Concentration, Along with Varying Temperature and pH-Balanced Environments on the Enzyme-Catalyzed Reaction of pNPP Abstract: Introduction: Many of the chemical reactions, which take place in in living things are controlled by enzymes. In such cases, the enzyme is a protein in the cell which lowers the activation energy of a catalyzed reaction, which serves to increase the rate of the reaction. Alkaline phosphatase is made
Rating:Essay Length: 1,882 Words / 8 PagesSubmitted: December 5, 2009 -
Enzyme Lab
Introduction Enzymes are the catalysts of biochemical reactions that are produced in the cell. It changes the rate of reaction but is not consumed by it. The reaction produced breaks up substrate molecules, and afterwarc, the enzyme is free to move on to another substrate molecule. The substrate molecule is the original molecule that the enzyme attaches to it active site where the substrate is changed. There are several objectives to this lab. They
Rating:Essay Length: 1,123 Words / 5 PagesSubmitted: May 20, 2010 -
Enzyme Lab Report
AP Biology Lab: Catalase (Enzymes) Abstract In this laboratory exercise, studies of enzyme catalase, which accelerates the breakdown of hydrogen peroxide into water and oxygen. The purpose was to isolate catalase from starch and measure the rate of activity under different conditions. The laboratory was also conducted in association with a second laboratory that measured the effects of an inhibitor on the enzymes. Changes in temperature and pH along with Substrate Concentration and Enzyme
Rating:Essay Length: 838 Words / 4 PagesSubmitted: December 16, 2009 -
Enzyme Lab Report
Introduction: The purpose of this lab was to measure the extent of enzyme reaction on given substrates by means of color change. The reaction followed is given below: Tyrosinase„і Enzyme Pyrocatechol Hydroxyquinone Oxidation/Reduction Pink „і Brown E+S + [ES] = E+P Enzyme Reaction Hypothesis: If there is an increase in enzyme concentration, an increase in reaction temperature, or an increase in buffer pH, then greater intensity in a given reaction will be experienced, resulting in
Rating:Essay Length: 657 Words / 3 PagesSubmitted: April 10, 2010 -
Enzyme Lab Using Jello
Enzyme Lab Using Jello INTRODUCTION: Enzymes are known as protein catalysts. The name protein catalyst suggests that most enzymes are made of proteins. A catalyst is a substance that speeds up chemical reactions without being consumed in the process. (Giuseppe, M 2002, p.69). After a reaction has been catalyzed, the catalyst can be used again to catalyze the same reaction. Enzymes reduce the activation energy (minimal energy) it takes for a reaction to take place.
Rating:Essay Length: 1,296 Words / 6 PagesSubmitted: January 11, 2010 -
Enzyme Reaction of Different Yeast Substances
Title: Enzyme Reaction of Different Yeast Substances Introduction: In this lab, my group was able to learn and understand the process of cellular respiration. Our goal in this lab was to find out which solution reacted most with the enzymes in the yeast. The effects of inhibitors on enzymes and the activity of yeast on different solutions were measured in this lab. In lecture, we learned that fermentation enables some cells to produce ATP without
Rating:Essay Length: 993 Words / 4 PagesSubmitted: January 27, 2010 -
Enzyme Regulation
Enzyme Regulation Enzymes allow many chemical reactions to occur within the homeostasis constraints of a living system. Enzymes function as organic catalysts. A catalyst is a chemical involved in, but not changed by, a chemical reaction. Many enzymes function by lowering the activation energy of reactions. By bringing the reactants closer together, chemical bonds may be weakened and reactions will proceed faster than without the catalyst. Enzymes are proteins, the functioning of the enzyme
Rating:Essay Length: 1,690 Words / 7 PagesSubmitted: December 27, 2009 -
Enzymes
Enzymes are biological catalysts that speed up the rate of a chemical reaction. Being a catalyst, enzymes are not consumed during the reaction and are able to be used numerous times. Enzymes work by lowering the activation energy for a reaction, dramatically accelerating the rate of the reaction. Enzymes are composed of proteins, their exact function is determined by their structure, which is a combination of the sequence of amino acids (from which all proteins
Rating:Essay Length: 452 Words / 2 PagesSubmitted: January 10, 2010 -
Enzymes
Introduction Enzymes are protein catalysts which are crucial to life. Enzymes are proteins that help to spped up chemical reactions in the body. Without enzymes, many of the important processes of life could not happen. Enzymes are very specific in their functions. Each enzyme has only one reaction that it can help. Enzymes are not changed when they perform their function. This means that the same enzyme molecule can be used over and over again.
Rating:Essay Length: 314 Words / 2 PagesSubmitted: May 26, 2010 -
Enzymes
Experiment 1: In preparing the effects of environmental conditions on enzyme reactions, the altering of enzyme in solutions vary upon how abundant a substrate is. This experiment will produce how much enzyme solution should be used in the following assay. To begin this procedure a mortar and pestle should be used to crush a lactide pill. This will be seen in the introductory steps as well as two small one hundred milliliter beakers, a timer,
Rating:Essay Length: 811 Words / 4 PagesSubmitted: November 11, 2018 -
Enzymes Coursework
ENZYME INVESTIGATION Planning Introduction: An Enzyme is any one of many specialised organic substances, composed of polymers of amino acids, that act as catalysts to regulate the speed of the many chemical reactions involved in the metabolism of living organisms. Those enzymes identified now number more than 700. Enzymes are classified into several broad categories, such as hydrolytic, oxidising, and reducing, depending on the type of reaction they control. Hydrolytic enzymes accelerate reactions in which
Rating:Essay Length: 1,854 Words / 8 PagesSubmitted: May 1, 2010 -
Enzymes Essay
Enzymes Enzymes are the sparks that start the essential chemical reactions our bodies need to live. They are necessary for digesting food, for stimulating the brain, for providing cellular energy, and for repairing all tissues, organs, and cells. There are three types of enzymes: metabolic enzymes, digestive enzymes, and food enzymes. Metabolic enzymes catalyse, or spark, the reactions within the cells. The body's organs, tissues and cells are run by metabolic enzymes. Without them our
Rating:Essay Length: 722 Words / 3 PagesSubmitted: November 14, 2009 -
Ephedra
Until recently no herb have been researched as heavily and extensively as ephedra. Ephedra has been broadcasted all over the news in the past few years. But it hasn’t been all good news that has been portrayed, its been the deadly effects of the herb that has caught the public’s eye. More than half the American population is obese, so it's no surprise weight loss supplements are popular. What is surprising is that these
Rating:Essay Length: 344 Words / 2 PagesSubmitted: December 20, 2009 -
Ephedrine
There are great health and social pressures in our society to be thin. Experts agree that combining a healthy diet with regular exercise is the best way to lose weight. However, hundreds of different nutritional supplements are readily available on the market claiming to enhance physical performance and help with weight loss. These products are readily purchased by consumers looking for fast results without much concern or knowledge of the possible side effects or dangers.
Rating:Essay Length: 3,286 Words / 14 PagesSubmitted: January 17, 2010 -
Epidemic Diseases
Of the many diseases spread by insects, none are actually caused by the insects themselves but by other organisms passed on when they feed or bite. Insects are capable of spreading diseases caused by many different types of microorganisms including bacteria, viruses, protozoan and others. Mosquitoes have earned the title of "the most deadly creature on earth." This is due to the fact that they spread serious epidemic diseases such as Malaria, Yellow Fever, African
Rating:Essay Length: 2,593 Words / 11 PagesSubmitted: November 29, 2009 -
Epidemics Throughout History
Malaria A thin-film Giemsa stained micrograph of ring-forms, and gametocytes of Plasmodium falciparum. Brief Overview • Malaria is one of the most common infectious diseases and an enormous public-health problem. • Malaria is a vector-borne infectious disease that is widespread in tropical and subtropical regions • It infects between 300 and 500 million people every year and causes between one and three million deaths annually, mostly among young children in Sub-Saharan Africa. • The disease
Rating:Essay Length: 301 Words / 2 PagesSubmitted: November 30, 2009 -
Epidemiology Article Summary
Epidemiology Health Article Summary #2 Scientists at the UT Southwestern Medical Center in Dallas recently completed human testing on a ricin vaccine. Ricin is a toxin extracted from castor beans and is deadly when eaten, breathed or injected. Small amounts can cause organ failure and even death. The primary concern regarding ricin is its ease of availability, resulting in its biological agent classification. It could easily be used as a terrorist weapon and has in
Rating:Essay Length: 318 Words / 2 PagesSubmitted: November 19, 2009 -
Epidemiology Is the only Way of Asking Some Questions in Medicine.
Epidemiology is the only way of asking some questions in medicine. My view on epidemiology has changed a lot since the beginning of the course. I always viewed it as a subject that is important to learn about how a disease brings about changes in the community, but every chapter that I studied revealed a more different meaning to epidemiology. In day to day practice the amount of dose that is specified for a child
Rating:Essay Length: 361 Words / 2 PagesSubmitted: March 19, 2019 -
Epilepsy in Children
Epilepsy in Children Schuyler Wilson Nursing Care Through the Lifespan III June 28, 2005 Epilepsy is the name for a condition of recurrent seizures where no underlying cause can be determined. Seizures occur as a result of abrupt, explosive, unorganized discharges of cerebral neurons. This causes a sudden alteration in brain function involving sensory, motor, autonomic and/or psychic clinical manifestations. Epilepsy can be a result of other conditions including: § Genetic predisposition § Brain
Rating:Essay Length: 1,130 Words / 5 PagesSubmitted: November 20, 2009 -
Equilibrios En Solucion Acuosa Y Volumetria Acido-Base
EQUILIBRIOS EN SOLUCION ACUOSA Y VOLUMETRIA ACIDO-BASE Acidos polipróticos A un ácido que libera únicamente un protón se le llama ácido monoprótico. El ácido carbónico, H2CO3, libera dos iones hidrógeno y se le llama ácido diprótico; el H3PO4 (ácido fosfórico) es un ácido triprótico, etc. En general, a los ácidos que liberan dos o más protones se les llama ácidos polipróticos. El ácido fosfórico y algunos aminoácidos son ácidos polipróticos importantes. Los fosfatos participan como
Rating:Essay Length: 2,817 Words / 12 PagesSubmitted: June 1, 2013 -
Er Nursing
Job Essay: E.R. Nurse Emergency nursing is a dynamic, fast-paced field that gives you the opportunity to treat a wide range of patients with an even wider range of illnesses, conditions and traumas. ER nurses have to be able to think on their feet, work well with their teammates and be ready for just about anything. ER nurses are highly trained in their specialty, and there are lots of certifications available. At a minimum,
Rating:Essay Length: 363 Words / 2 PagesSubmitted: January 11, 2010 -
Ertt
List the molecular weight, melting point, boiling point, density, solubility, and hazards of all pertinent chemicals used in the experiment. You can find this information in the CRC Handbook of Chemistry and Physics. (We have this book at school, and a CD-ROM version as well.) Or, you can find the information on the Internet (see: Hazard and Physical Data for Compounds page). Chemfinder.com is an excellent site to find this data. The physical data are
Rating:Essay Length: 578 Words / 3 PagesSubmitted: May 13, 2011 -
Escherichia Coli 0157:h7
Escherichia coli 0157:H7 OR (E. coli) is a food born pathogen that can cause serious illness or if left untreated can cause death. One of the obvious symptoms of E. coli is bloody diarrhea although not all forms of E coli have the same symptoms. The main toxins all strains of E. coli produce are called shiga toxins, the toxins alone are not able to make E. coli pathogenic it needs the presence of other
Rating:Essay Length: 563 Words / 3 PagesSubmitted: December 15, 2009