Science
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4,609 Essays on Science. Documents 1,681 - 1,710
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Friedel-Crafts Alkylation of Benzene with 1-Bromopropane : Study of Carbocation Rearrangement.
Experiement 16 Friedel-Crafts alkylation of Benzene with 1-Bromopropane : Study of Carbocation Rearrangement. Jeongmin Lee 03-11-2015 Objective The goal of this experiment is to exemplify a Friedel-Crfats reaction, to study a reaction involoving carbocation rearrangements, to identify compounds using gas chromatography, and to gain exposure to processing NMR data. Starting Material 185uL of 1-bromopropane + 2.5mL of dry benzene Procedure A triangular magnetic stir bar, 185uL of 1-bromopropane, 2.5mL of dry benzene and a spatula
Rating:Essay Length: 673 Words / 3 PagesSubmitted: April 6, 2015 -
Friendly Aliens
Friendly aliens I don’t believe that today’s wonders are similar in kind of the wonders of the Ancient World. They were all buildings, such as the Pyramids in Egypt, or other architectural structures. Over the past 100 yeas, we have seen amazing technologies and scientific achievements. These are surely our modern wonders. Our galaxy the Milky Way contains over 200 billion stars and there are nine planets in our solar system. In 1969, Neil Armstrong
Rating:Essay Length: 544 Words / 3 PagesSubmitted: January 16, 2010 -
Fritz Zwicky and Supernovae
Fritz Zwicky was born in Bulgaria and earned his PhD in physics at the Federal Institute of Technology in Zurich. After completing his studies, he spent most of his life in the United States researching at California Institute of Technology. Zwicky introduced and coined the term supernova and clearly distinguished it from the more common nova. He and his colleague Walter Baade suggested that supernovae were exploding stars that collapsed to form neutron stars. Supernovae
Rating:Essay Length: 254 Words / 2 PagesSubmitted: December 25, 2009 -
Frogs
Feet and legs The structure of the feet and legs varies greatly among frog species, depending in part on whether they live primarily on the ground, in water, in trees, or in burrows. Frogs must be able to move quickly through their environment to catch prey and escape predators, and numerous adaptations help them do so. Many frogs, especially those that live in water, have webbed toes. The degree to which the toes are webbed
Rating:Essay Length: 328 Words / 2 PagesSubmitted: January 17, 2010 -
From Darwin and Mendel to Gmo
From Darwin and Mendel to GMO DNA is the blueprint for life on earth. The structure of DNA was discovered in the 1950’s, and by the 1970’s scientist were able to cut DNA from one organism and place it into the DNA of another organism. But, long before recombinant DNA, two scientists laid the basis. Mendel was an Austrian monk who cross-bred pea plants in his monastery garden. Mendel looked at the phenotypic expression of
Rating:Essay Length: 877 Words / 4 PagesSubmitted: July 7, 2017 -
From Gene to Protein – Transcription and Translation
Name: Kerk Zi Rui Student ID: J16020961 Experiment Name: From gene to protein – transcription and translation Results: What is a gene? Give a definition, and give some examples of genes. Gene is a part of a chromosome that encodes an RNA or protein product in its DNA sequence. In transcription, enzyme uses gene’s DNA sequence as a template to assemble a strand of RNA. Examples of genes height and skin color of a person.
Rating:Essay Length: 1,447 Words / 6 PagesSubmitted: November 15, 2016 -
Fruit Fly Genetics
Introduction In this lab a study of fruit fly genetics was done these creature are readily used for genetic studies .they are easy to maintain. And the females lay a lot off eggs which develop in about two weeks. Fruit fly’s have for distinct stages, the egg, larva, pupa and adult. the egg and larva stages last for eight days, the pupal stage last for six days and then the adult stage which last for
Rating:Essay Length: 606 Words / 3 PagesSubmitted: November 14, 2009 -
Ft.Lauderdale High Ap Bio Project
2) LEVEL 1 - Cells Are the basic unit of structure and function in living things.May serve a specific function within the organism Examples- blood cells, nerve cells, bone cells, etc. tissue LEVEL 2 - Tissues Made up of cells that are similar in structure and function and which work together to perform a specific activity Examples - blood, nervous, bone, etc. Humans have 4 basic tissues: connective, epithelial, muscle, and nerve. LEVEL 3 -
Rating:Essay Length: 1,075 Words / 5 PagesSubmitted: November 16, 2009 -
Fuel Cells
Fuel Cells Petroleum, the worlds most prolific fuel, is becoming more scarce and its burning produces emissions which shoulder much of the responsibility for air pollution (Fig. 1). Contributions also come from deforestation, carbon dioxide from the burning of coal, and methane release. In order to reverse the trend of destroying the environment, a change to a more ecologically mundane resource, or method of producing energy such as hydrodynamic, wind, geothermal, solar and tidal
Rating:Essay Length: 4,657 Words / 19 PagesSubmitted: November 10, 2009 -
Fuel Cells
Fuell Cells A fuel cell is an ‘electrochemical energy conversion device’ used to produce electricity. To do this, most fuel cells convert the gases hydrogen and oxygen into water, a process which produces electricity. Unlike other electrochemical devices (like batteries for example), fuel cells will constantly produce electricity as long as there is a flow of chemicals into the cell. Fuel cells produce electricity in a direct current which can be used to power motors,
Rating:Essay Length: 408 Words / 2 PagesSubmitted: April 18, 2010 -
Fundamentals of Nursing
Fundamentals of Nursing- Theory hours: 90 Clinical hrs: 325 1. Introduction to Nursing: - Meaning of nursing - Definitions of nursing - Scope of nursing - Role of a nurse - Health Team - Aims of nursing in the hospital and community 2. Nursing Profession - Nursing as a profession - Professional adjustment - Qualities of a nurse - Ethics in nursing 3. History of Nursing - Ancient period - Middle period - Modern Era
Rating:Essay Length: 1,616 Words / 7 PagesSubmitted: December 15, 2009 -
Fusion: Our Future's Energy?
Fusion: Our Future's Energy? Fusion energy seems to be the most promising energy source of the not-too-distant future. It is safe, it uses an energy supply that is so abundant that it will never run out, it gives off harmless waste, and it produces energy comparable to the Earth's sun! But are there any problems with this hopeful energy source? What is Nuclear Fusion? To understand fusion, it is a good idea to know about
Rating:Essay Length: 1,011 Words / 5 PagesSubmitted: May 28, 2010 -
Future of Respiratory Therapy
Future of Respiratory Therapy By entering the field of respiratory therapy, one is entering a growing field of opportunity. There are continually emergent job opportunities in this field whereas there is also a rise of growth in the technology and developments in the field such as medicines, techniques, and other aspects. Respiratory therapy refers to both a subject area within clinical medicine and to a distinct health care profession. During the 20th century, there were
Rating:Essay Length: 466 Words / 2 PagesSubmitted: November 13, 2009 -
Future of the Un System
Chapter 19 “Thinking about the future of the UN system” Name: Dimitris Karagousgounis What happens in the International Relations arena in order to take a glimpse of what is happening in International Politics and generally to study and examine international systems we usually hung up on what’s wrong with the picture: riots and their suppression, military takeovers, drug traffic, corporate raids, financial psychoses, arm races, wars and rumors of wars. Harlan Cleveland states that if
Rating:Essay Length: 1,033 Words / 5 PagesSubmitted: December 3, 2009 -
Fuzzy Logic Approach to Enhance Energy Conversion in Solar Powered Vehicles
The mounting demands for fossil fuels, the ensuing global energy crisis, the inadequacy and limitations of solar vehicle to answer the needs of the hour is where the roots of the paper takes origin. The idea of solar vehicles as a potential solution is acknowledged, and enhancing the vehicle to match the performance of the conventional vehicles is the challenge that researches are trying to outwit. Conventional photovoltaic technology is based on harnessing the sun’s
Rating:Essay Length: 390 Words / 2 PagesSubmitted: May 27, 2010 -
Gad2 Identified as Candidate Gene for Obesity
“GAD2 Identified as Candidate Gene for Obesity” Summary Obesity is a very hard condition to link to one specific gene because it often runs in families, but their lifestyle habits, as well as genes, contribute to obesity. Also, many genes contribute a small effect to obesity and may differ in different populations. Nuclear families in France were studied to link a candidate gene for obesity by Philippe Froguel and his colleagues. There are many variations
Rating:Essay Length: 391 Words / 2 PagesSubmitted: January 8, 2010 -
Galactosemia
Galactosemia Galactosemia is an inborn error of metabolism. Because of energy barriers, essentially none of the chemical reactions that take place in living things could occur at any measurable rate without the presence of a catalyst. Most catalysts in living things are enzymes that depend on their structure to be able to function. Their structure is determined by their coding on DNA. Inborn errors of metabolism, like the one seen in galactosemia, are caused by
Rating:Essay Length: 825 Words / 4 PagesSubmitted: January 10, 2010 -
Galapagos and Its Ecosystem
Galapagos and its Ecosystem Galapagos Islands consist of a group of nineteen individual islands 600 miles off the coast of Ecuador (Duval, 2006). Total land area of Galapagos is 8,000 square kilometers. The Spanish sailors named the island “Galapagos” because of the enormous tortoise living in the islands. Ecuador has claimed the islands as part of its territory. In 1835, Charles Darwin visited the islands and observed the many different species of animals that lived
Rating:Essay Length: 768 Words / 4 PagesSubmitted: November 23, 2009 -
Galapagos Islands
Welcome to the Galapagos Islands! The Galapagos are an archipelago of several volcanic islands located in the Pacific Ocean. The archipelago consists of 13 major islands, six minor islands, and 40 smaller rock formations and reefs spread out over 17,000 square miles of ocean. They are born to create fire, and in the last 200 years a remarkable 50 plus eruptions have occurred. Looking into the geographic location and plate tectonic settings can easily
Rating:Essay Length: 489 Words / 2 PagesSubmitted: November 13, 2009 -
Galileo Alternative Trial Options
Mat Walter Mrs. Hibner Gifted Workshop 9/10 24 February 2006 Galileo Galilei Trial Proposal The trial of Galileo Galilei could be one of the most famous in history. The Church’s actions and verdict are very controversial, but what other options did they have? Could the situation have been avoided at all? There are numerous ways Galileo could have been dealt with, and it is arguable that they would have been much more effective. One way
Rating:Essay Length: 561 Words / 3 PagesSubmitted: January 5, 2010 -
Galileo an Inertia
Chris Price 7/15/06 Physical Science Galileo and Inertia When many people think of the “Concept of Inertia” they think of Isaac Newton and his three “Laws of Motion” but in actuality another philosopher envisioned the concept. Aristotle believed that objects at rest remained at rest unless a force acted on them, but that objects in motion did not remain in motion unless a force acted constantly on them. But Galileo Galilei later proved that
Rating:Essay Length: 589 Words / 3 PagesSubmitted: February 4, 2010 -
Galileo Galilei
Galileo Galilei Galileo’s parents were Vicenzo Galilei and Gulia Vincenzo. Galileo was born on February 15, 1564 in Pisa, which is now Italy. In 1572 when Galileo was eight his family returned to Florence while he stayed in Pisa to live with Muzio for 2 years. At the age of ten he left to join his family. There he was tortured by Jacapo Borghinti. Once he was old enough he was sent to the Camoldelese
Rating:Essay Length: 588 Words / 3 PagesSubmitted: December 14, 2009 -
Galileo Galilei
Galileo Galilei Galileo was a mathematician transformed into an astronomer. He created the modern telescope based on a primitive model that originated in Amsterdam. Galileo disproved Aristotle's fundamental principles of the universe, which had been excepted throughout the centuries as common knowledge. According to this theory, no change could ever take place in the heavens, because everything in them was made of a perfect and unalterable substance called the “quintessence.” However, in October 1604, Galileo
Rating:Essay Length: 853 Words / 4 PagesSubmitted: May 18, 2010 -
Galileo Galilei
Galileo Galilei (1564-1642), who was considered the father of modern science, made many important contributions to the fields of physics, astronomy, cosmology, mathematics and philosophy. Galileo was the first scientist to try “experimental scientific method” and was also the first to use a refracting telescope to make major astronomical discoveries. He discovered a number of scientific insight that paved the way for future scientists like Isaac Newton. In 1583, Galileo made his first important discovery,
Rating:Essay Length: 742 Words / 3 PagesSubmitted: April 16, 2017 -
Galileo, Life Outline
Galileo Outline I. Galileo Galilei’s Life ==> Galileo was born in Pisa, Italy on the 15th of February in 1564 ==> He was the first of six children born to Vincenzo Galilei and Giulia Ammanati ==> With schooling Galileo became fluent in both Latin and Greek, as well as his native Italian. ==> Galileo was pressured to go into medicine by his father, although he probably would have preferred to be a painter. ==> Galileo
Rating:Essay Length: 338 Words / 2 PagesSubmitted: November 21, 2009 -
Gallbladders
Gallbladders I decided to write my paper on the gallbladder, because I find this particular organ interesting. There will be some information about bile, a substances the liver manufactures and the gallbladder stores. This paper will elaborate on the structure and functions of the gallbladder. There is an explanation of the gallbladders emptying process, and the chemicals that aide in its engagement. Also included is information on disorders of the gallbladder and diseases of the
Rating:Essay Length: 1,901 Words / 8 PagesSubmitted: November 12, 2009 -
Galveston Hurrican
Galveston, Texas was a booming city at the end of the 19th century with a population of about 42,000 people, the biggest city in Texas. It was built around the Galveston Harbor on the Gulf of Mexico which made it a center for trade and commerce. The city was in the midst of a great boom and cotton season had just begun. Galveston had become the largest cotton port in the US. Over the course
Rating:Essay Length: 519 Words / 3 PagesSubmitted: April 2, 2010 -
Game Theory in Nature
Game Theory in Nature: Biologists observe that animals and even lower organisms often behave altruistically. Such behavior is obviously beneficial for the species as a whole. Although it is difficult to measure how an animal’s altruistic behaviour affects its chances for survival and reproduction, theoretical research is starting to fill in the picture of how cooperation may survive natural selection. Some of the most illuminating ideas are coming from game theory, the field of mathematics
Rating:Essay Length: 394 Words / 2 PagesSubmitted: December 27, 2009 -
Gardasil
Gardasil is a vaccine being made by Merck & Co., Inc. which has been approved by the FDA to prevent cervical cancer in young women between the ages of 9 and 26. Gardasil is a vaccine against the HPV or Human Papillomavirus. The Gardasil vaccine protects those who receive it against 4 types of HPV, including the two types that cause most cervical cancers and the two types that cause the most genital warts. HPV
Rating:Essay Length: 419 Words / 2 PagesSubmitted: January 13, 2010 -
Gasoline Toxic Compounds and Adverse Effects on the Environment
GASOLINE TOXIC COMPOUNDS AND ADVERSE EFFECTS ON THE ENVIRONMENT In the early 20th Century gasoline was being produced by oil companies using distillates from petroleum. Unfortunately, this was not enough energy to power the new atutomobiles that would soon be arriving. More chemicals, addetives and research had to be done. Around 1910 laws were passed that prohibited gasoline from being stored. Perhaps the car industries were growing so rapidly, it was then the government began
Rating:Essay Length: 943 Words / 4 PagesSubmitted: November 21, 2009