Science
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4,610 Essays on Science. Documents 2,431 - 2,460
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Lab Report: Qualitative Analysis
Lab Report: Qualitative Analysis Aim: The aim of this experiment is to identitfy an unknown powder by conducting several experiments to determine the anion and cation of the given salt. Hypothesis: The unknown salt named "H" could be ferric nitrate ( iron(III)nitrate) since the salt exists as pale violet crystals. Qualitative Observations: When testing for nitrate ions I saw that the gas given off from the solution turned the red litmus paper blue. This showed
Rating:Essay Length: 259 Words / 2 PagesSubmitted: January 16, 2009 -
Lab: Effect of Temperature on the Catalase Enzyme
Lab: Effect of Temperature on the Catalase Enzyme Background Information: Catalase is an enzyme which is commonly found in mammalian animals, such as, but not limited to, humans and cows. Catalase’s function in the body is to dissolve hydrogen peroxide. Without the aide of Catalase we would die as hydrogen peroxide is poisonous to humans. Catalase works with the hydrogen peroxide molecule because the substrate (hydrogen peroxide) has a shape which corresponds to the enzyme
Rating:Essay Length: 546 Words / 3 PagesSubmitted: February 8, 2010 -
Lab: Identifying Plant Pigments by Chromatography
Lab: Identifying Plant Pigments by Chromatography Tessa Czerlau & Grace D’Agostino Mr.Brgan 28 April 2017 SBI 4U Question: What types of pigments are found in green leaf extracts from three different species of plants? A plant pigment is a type of coloured chemical compound produced by a plant. These compounds absorb and reflect visible light radiation with wavelengths ranging from 380nm-760nm. Plant pigments give color to leaves, flowers, and fruits and are also important in
Rating:Essay Length: 2,951 Words / 12 PagesSubmitted: June 8, 2017 -
Labelling Theory
Becker was influenced by the following: Charles Cooley's Human Nature and the Social Order (1902) examines the personal perception of oneself through studies of children and their imaginary friends. Cooley develops the theoretical concept of the looking glass self, a type of imaginary sociability (Cooley 1902). People imagine the view of themselves through the eyes of others in their social circles and form judgements of themselves based on these imaginary observations (Cooley 1902). The main
Rating:Essay Length: 2,779 Words / 12 PagesSubmitted: April 14, 2010 -
Laboratory 8: Population Genetics and Evolution
Biology 11 Pre-AP Lab Report Laboratory 8: Population Genetics And Evolution Block 6 BACKGROUND INFORMATION The Hardy-Weinberg theory suggests that evolution occurs through changes in frequencies in alleles. The reason for this lab is to find what effect altering the environment has on the equilibrium. In the lab, P is the representation of the dominant trait, and q is the representation of the recessive one. The formula of the Hardy-Weinberg equilibrium is p2+2pq+q2=1. There are
Rating:Essay Length: 1,783 Words / 8 PagesSubmitted: February 27, 2018 -
Laboratory one: Introduction to Microscopy
LABORATORY ONE: INTRODUCTION TO MICROSCOPY Ang, Elaine Ceperiano, Arjohn Dizon, Juan Paulo Galbraith, Natasha Allen Lim, Fenina Joyce Ng, Mary Cathlyn Ongsiyping, Janelle Santos, Emmanuel Ty, Michelle Jenine Ateneo de Manila University Loyola Heights Campus Katipunan Avenue, Loyola Heights, Quezon City 1108, Philippines Key words. Calibration, compound light microscope, magnification, monocot root. Abstract This lab activity aims to provide us a comprehensive familiarity with the proper use and handling of the optical microscope, which is
Rating:Essay Length: 331 Words / 2 PagesSubmitted: December 25, 2009 -
Lac Operon
Short Report: Lac Operon. The lac operon is a set of structural genes that consists of one regulatory gene, Lac I, and three structural genes: Lac Z, Lac Y and Lac A [1,2]. Lac I codes for the repressor protein of the lac operon. Lac Z codes for b-galactosidase, which hydrolyze lactose into glucose and galatose [1,2]. Lac Y codes for permease, which increases permeability of the cell to b-galactosides [1,2]. Lac A codes
Rating:Essay Length: 1,008 Words / 5 PagesSubmitted: May 26, 2010 -
Ladybugs
BIO-1100 Principles of Biology Ladybugs By Jozef Vandenmooter Introduction Ladybug is the name commonly used to describe the Coccinellidae (which means clothed in scarlet), members of the Coleoptera, or beetle family. They are also known as Lady beetles, Ladybirds, Ladybird Beetles or Ladybird Bugs. The ‘lady’ referred to is the Virgin Mary. In German they are called Marienkafer, or Mary beetles. In Dutch we call them LieveHeersbeestjes, or Dear Lord Bugs. The reason they are
Rating:Essay Length: 500 Words / 2 PagesSubmitted: November 30, 2009 -
Lake Mendota
The study of the microbial diversity in Lake Mendota will enable us to understand the different types of environments an organism can grow in. Lake Mendota was once a clean lake like any other lake. The problem arrived when houses being built near the lake with indoor plumbing decided to dump the sewage into the lake. Once that began a high number of weed and algae started to grow (1). The sewage being dumped into
Rating:Essay Length: 497 Words / 2 PagesSubmitted: January 18, 2010 -
Lake Nyos
In African mythology, several Cameroonian tribes believe that the souls of the dead reside below the surface of rivers and lakes waiting for their chance at revenge and to haunt the living for years to come. One such lake is Lake Nyos, known to the locals as “the bad lake.” In August of 1986, Lake Nyos claimed the lives of over 1,800 men women and children along with thousands of wild and herded animals
Rating:Essay Length: 319 Words / 2 PagesSubmitted: February 18, 2010 -
Lasik - Laser Assisted in Situ Keratomileusis
In the morning, have you ever had to grab your glasses to see the blaring alarm clock? Do you consider yourself "blind as a bat"? If you nodded your head to either of these questions, you've probably heard about the LASIK eye surgery that can, in some cases, fix all of those problems. LASIK is a relatively new procedure for select candidates who know both the benefits and risks of the operation. LASIK stands for
Rating:Essay Length: 1,579 Words / 7 PagesSubmitted: December 23, 2009 -
Law Enforcement Applications
Objects around us give off heat to some degree, and that heat is made up of long wavelength infrared radiation that the human eye cannot see. Thermal imaging uses a sensor to convert the radiation into a visible light picture. Not only does this picture help us identify objects in total darkness, or through dense smoke, but the sensor information can be used to measure temperature differences as well. New uses for thermal imaging are
Rating:Essay Length: 662 Words / 3 PagesSubmitted: December 24, 2009 -
Law Enforcement officers Role
The major issue affecting our community in the San Francisco County is the manner of how law enforcement officials are performing their duties. Are our police officer’s using excessive force needed to apply towards arresting or apprehending a suspect or suspects? This question seems to be the major issues that surround our police department. Sworn police officers not following their responsibilities and duties. Why I chose this field of expertise as a functional role in
Rating:Essay Length: 925 Words / 4 PagesSubmitted: November 21, 2009 -
Lawrence Livermore Labs
The Lawrence Livermore National Laboratory is a United States Department of Energy National Laboratory, based in Livermore, California and run by the University of California. The laboratory is one of two in the nation which is designated to design nuclear weapons. Its research, however, has been expanded to include general energy and environmental issues, as well as issues dealing with bioscience. The laboratory’s mission statement is currently “to promote innovation in the design of
Rating:Essay Length: 266 Words / 2 PagesSubmitted: February 5, 2010 -
Laws Were Meant to Be Broken: Perpetual Motion Devices
Laws were Meant to be Broken: Perpetual Motion Devices D. S. C. and P.C. K. (Created 4 October 2005) Introduction Perpetual motion devices have always been seen as a feat unattainable with the current laws of thermodynamics. Accordingly, the second law of thermodynamics states that thermal energy (heat) is special by concluding all forms of energy can be converted into heat, but it is not possible to convert the heat back fully in its original
Rating:Essay Length: 600 Words / 3 PagesSubmitted: March 28, 2010 -
Lead-Teratogen
Teratogens-Lead Originally, I chose Progestin for this paper. After a week of research, I got nowhere. I decided to go with lead. I knew that several years ago, the government banned the use of lead in paint, but I did not know why. I thought it would be interesting to find out. Lead is a very common mineral. It can be found in water, ammunition, gasoline, pipes, old paint, batteries, electronics, automobiles, fishing weights, pottery,
Rating:Essay Length: 781 Words / 4 PagesSubmitted: May 7, 2010 -
Leadership
Nascut in 1947 in Statele Unite, Maxwell a primit o educatie de tip religios, iar ulterior a devenit pastor evanghelist. In anii ’70 a inceput sa-si dezvolte abilitatile de leadership pentru a deveni unul dintre cei mai cunoscuti speakeri si autori in domeniul leadershipului. A publicat aproape 60 de titluri si a vandut circa 20 de milioane de exemplare. In 1996 a fondat organizatia non-profit EQUIP, care a pregatit profesional peste cinci milioane de lideri
Rating:Essay Length: 2,128 Words / 9 PagesSubmitted: March 29, 2015 -
Learning Behavior
Learning Behavior Psychologists have preformed many studies and proposed many theories regarding learning. Learning can be defined as a relatively permanent change in behavior that is due to past experience. John B. Watson was an early psychologist that didn't agree with many other psychologist's ideas about learning only relating to consciousness and thought processes. As the founder of behaviorism, Watson studied learning in a behavioral perspective, an approach that emphasizes the relationship between outwardly observable
Rating:Essay Length: 744 Words / 3 PagesSubmitted: March 24, 2010 -
Learning Project
The skill that I learned was how to tie a half-windsor tie knot. This is a wide knot compared to other knots such as the four in hand knot. The knot has simply seven steps as shown: 1 Start with the wide end ("W") of your necktie on the right, extending about 12 inches below the narrow end ("N") on the left. Then cross the wide end over the narrow end. Bring the wide end
Rating:Essay Length: 1,510 Words / 7 PagesSubmitted: April 23, 2011 -
Lec Type Ia Supernova & Type II Supernova
Type Ia supernova: Dense white dwarf attracts some of the material from companion start and mass of white dwarf increases. After it compresses and heats up. Fusion reactions start when mass gets close to chandrasekhar limit at 1.38m. So much energy is released that entire system is disrupted in a gigantic explosion (Type Ia supernova). Note: no hydrogen spectral lines in spectrum of type Ia supernova. Due to high luminosity can see easily at very
Rating:Essay Length: 345 Words / 2 PagesSubmitted: February 6, 2019 -
Legalization of Marijuana for Medical Use only
The history of U.S. policy toward mind-altering substances has followed cycles of tolerance and intolerance ever since the mid-19th century. Walking into a smoked filled room, of young and old engaged in therapeutic activities for numerous health conditions, has been practice worldwide. In fact, the medical use of the cannabis plant goes back at least 5,000 years to ancient China. It was used by most of the world’s cultures for its healing properties (Medical Marijuana
Rating:Essay Length: 2,653 Words / 11 PagesSubmitted: December 29, 2009 -
Legalization of Voluntary Euthanasia
Can you imagine lying in a tiny white room, scared, alone and unable to see your family? This is what thousands of people must endure every year when they are sent to asylums or isolated hospital rooms due to tuberculosis. (Dekker 6) Tuberculosis is a deadly and excruciating disease that causes severe agony not only to the patient, but to the family. Our society should do everything in its power to help those suffering
Rating:Essay Length: 897 Words / 4 PagesSubmitted: March 19, 2010 -
Legalizing Marijuana
Marijuana is a dry, shredded green/brown mix of flowers, stems, seeds, and leaves of the hemp plant Cannabis sativa. It is usually smoked in different forms such as a cigarette, blunt, or bong, and can also be mixed into food or brewed as a tea (NIDA). Many chemicals make up marijuana, but the most common elements found in the drug include 66 cannabinoids. Cannabinoids are chemicals that create a euphoric state of being which causes
Rating:Essay Length: 948 Words / 4 PagesSubmitted: January 15, 2010 -
Legg-Calve-Perthes Disease
Legg-Calve-Perthes Disease (a.k.a. Osteonecrosis) is a rare, temporary condition only found in children ages 4 to 12, with the average of 6 years old. In an infected child, the femoral head loses its blood supply; bone begins to die and over time may develop a fracture. The bone then begins to slowly reabsorb and it is replaced with new tissue and bone. This can be very painful for child and can take many years to
Rating:Essay Length: 867 Words / 4 PagesSubmitted: May 24, 2010 -
Lense and Image Formation
Light that is emitted from a surface, or reflected from it, leaves the surface in the form of spherical wavefronts. Every point on the surface can be thought of as a source of these wavefronts. Rather than drawing the wavefronts, we customarily illustrate the propagation of light with rays. These are just lines with arrowheads that point in the direction in which the light is traveling. Lenses are objects made from a transparent material such
Rating:Essay Length: 337 Words / 2 PagesSubmitted: January 16, 2010 -
Let the River Run
Things occur in nature, that we as humans sometimes prevent from occurring naturally. For example - a dam on a river. Once put into use on a river, a dam simply stops or slows down the natural flow of the water. Sometimes this is for the better, however - sometimes, it is for the worse. This is the case in the Grand Canyon. Some rivers go through natural, periods of flooding and receding, at certain
Rating:Essay Length: 598 Words / 3 PagesSubmitted: December 3, 2009 -
Leukemia
Leukemia is named after the Leukocytes, white blood cells that mutate and become cancerous before maturity. These cells reproduce rapidly, slowing down the production of white blood cells that are important in the fight against infection in the body. Leukemia also slows down the production of red blood cells that are needed to carry oxygen in the blood. Cancer cell may spread to the liver, spleen, lymph nodes, genitals, or the brain, leukemia is incurable
Rating:Essay Length: 1,978 Words / 8 PagesSubmitted: November 13, 2009 -
Leukemia
Leukemia is something that we hear about a lot. I believe that people do not understand exactly what leukemia is and how dangerous it can be, I chose this topic to try to help them understand. In this paper I will explain what leukemia is and what treatments you can choose from to treat the cancer. Leukemia is a type of cancer. Cancer is a group of more than 100 diseases that have two or
Rating:Essay Length: 841 Words / 4 PagesSubmitted: January 29, 2010 -
Leukemia
Leukemia* is a malignant disease (cancer) of the bone marrow and blood. It is characterized by the uncontrolled accumulation of blood cells. Leukemia is divided into four categories: myelogenous or lymphocytic, each of which can be acute or chronic. The terms myelogenous or lymphocytic denote the cell type involved. Thus, the four major types of leukemia are: • Acute Lymphocytic Leukemia • Chronic Lymphocytic Leukemia • Acute Myelogenous Leukemia • Chronic Myelogenous Leukemia Acute leukemia
Rating:Essay Length: 1,223 Words / 5 PagesSubmitted: February 6, 2010 -
Leukemia
Leukemia is a disease characterized by the formation of abnormal numbers of white blood cells, for which no certain cure has been found. Leukemia is also conditions characterized by the transformation of normal blood-forming cells into abnormal white blood cells whose unrestrained growth overwhelms and replaces normal bone marrow and blood cells. Leukemias are named according to the normal cell from which they originate, such as Lymphocyte Leukemia. Lymphocyte Leukemia is where a Lymphocyte cell
Rating:Essay Length: 827 Words / 4 PagesSubmitted: March 1, 2010