Science
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4,610 Essays on Science. Documents 1,201 - 1,230
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Difference Between Butterfly and Moth
Spot the difference Who wouldn't be familiar with butterflies and moths? An apparent kind of insects comprising more than a hundred thousand species worldwide in the second largest insect order, Lepidoptera which refers to the distinctive covering of minute scales and overlapping like shingles on the wings. Butterflies and moths share similar features of anatomy, such as mouthparts for sucking nectar and two pair of wings that operate as one pair. In a like manner,
Rating:Essay Length: 509 Words / 3 PagesSubmitted: January 16, 2009 -
Different Kinds of Behaviours of Managers
1. At this point, what would you do if you were the project manager? As I project manager, I would present all the data & numbers collected from bottom up approach on time and cost estimates for the deliverables. I would make it clear that project cost is overrun around 20% by $1250000 and time is four months over than estimated by senior management. I would tell them that initial estimates were made on macro
Rating:Essay Length: 260 Words / 2 PagesSubmitted: November 16, 2017 -
Different Science Jobs
Forensic Pathologist performs autopsies to find out the cause of death and how the person had died. A forensic pathologist would look at wounds and injuries from the crime. They examine tissue specimens that may be part of a rape or another crime. Forensic pathologists also work closely with the coroner or medical examiner. They work as an expert in courts on civil or criminal law cases. In an autopsy, the forensic pathologist works with
Rating:Essay Length: 549 Words / 3 PagesSubmitted: December 22, 2009 -
Diffusion
Article Review #8 The thought of home solar power installation may scare us a great deal, yet this method of harnessing the suns energy is fairly simple. Today, there exists many DIY solar electricity kits which enable us to generate do it yourself power. If a homeowner does decide to install solar panels or solar electricity, they will see just how easy this can be, if they follow general and safety instructions. Usually, do it
Rating:Essay Length: 394 Words / 2 PagesSubmitted: November 9, 2009 -
Diffusion
Introduction What happens to the rate of diffusion as the concentration of salt is increased? Diffusion is the movement of particles from higher chemical concentration to lower chemical concentration. It is readily observed, for example, when dried food like spaghetti is cooked; water molecules diffuse into the spaghetti strings, making them thicker and more flexible. This lab is solely focused on the concentration of sucrose in a potato in relationship to the rate of diffusion.
Rating:Essay Length: 674 Words / 3 PagesSubmitted: January 6, 2010 -
Diffusion and Osmosis
Diffusion of Ammonium hydroxide with red litmus paper Definition of diffusion 1. Diffusion is the process in which particles move from an area of high concentration to an area of low concentration in order to evenly spread out. 2 Diagram. 3. During the diffusion tube experiment I noted that firstly ammonium hydroxide was placed on to a piece of cotton wool. The cotton wool (with the ammonium hydroxide) was then placed in to a diffusion
Rating:Essay Length: 1,904 Words / 8 PagesSubmitted: December 24, 2009 -
Diffusion and Osmosis: Observing Osmosis in Living Cells
Kathryn Ancarrow Farr AP Biology 7.03 Lab Report 3/30/17 Title: Diffusion and Osmosis: Observing Osmosis in Living Cells. Abstract: The purpose of this lab was to observe diffusion across a cellular membrane and exactly how materials move and diffuse in concentration. Both diffusion and osmosis are forms of movement that are part of passive transport dealing with cell membranes. Potatoes were placed in 6 different sucrose solutions to determine the concertation for an allotted amount
Rating:Essay Length: 456 Words / 2 PagesSubmitted: April 14, 2017 -
Diffusion on a Liquid in a Liquid
Part A: Diffusion on a liquid in a liquid. I did an experiment with three different glasses of tap water from the faucet. All three cups measured the same which happened to be 13 cm from the top of the cup to the bottom of the cup. I let the water settle, and sit for about an hour so the temperature was the same for all three cups. I then placed one drop of food
Rating:Essay Length: 1,463 Words / 6 PagesSubmitted: December 19, 2009 -
Diffusion with Surface Area to Volume Ratio
Introduction Cells have to interact with their environment, chemicals and water and in order to do so they must be able to move across the cell membrane and the cell. The movements within a cell are called Diffusion. When molecules move across a cell membrane it is known as Osmosis. Diffusion is the process by which molecules of a substance move from areas of higher concentration of that substance to areas of lower concentration. Diffusion
Rating:Essay Length: 264 Words / 2 PagesSubmitted: February 27, 2010 -
Diffution
Diffusion Lab Problem Will starch, water, glucose, iodine or a combination of the above diffuse across the membrane of the dialysis bag causing the bag to either expand or shrivel? Hypothesis & Strategy I believe that the smaller molecules, such as glucose and water will diffuse through the dialysis bag’s membrane causing it to expand, due to the concentration gradient. I would test this hypothesis by filling the bag with a solution consisting of water,
Rating:Essay Length: 698 Words / 3 PagesSubmitted: April 6, 2010 -
Digeorge Syndrome: A Study in Chromosomal Errors
DiGeorge Syndrome: A Study in Chromosomal Errors DiGeorge syndrome is an anomaly that occurs when the 22q11.2 chromosome has been deleted, causing many different symptoms in various parts of the body. Those affected by DiGeorge syndrome often display signs of heart disease and defect at birth, presence of “cleft” palate (opening in the roof of the mouth), learning disorders, autoimmune diseases (such as rheumatoid arthritis), hypocalcaemia (low presence of calcium in blood), speech disabilities, and
Rating:Essay Length: 369 Words / 2 PagesSubmitted: January 26, 2010 -
Digestion Story
Digestion Story Hi my name is carby and I’m a carbohydrate. I was just eaten by a human, and I’m gonna take you through the process that unfolded just now. Firstly I ended up in the human’s mouth otherwise known as the oral cavity. Mechanical digestion began as their teeth started to chew me. Saliva was being released by the three pairs of salivary glands we have. Saliva contains an enzyme called salivary amylase which
Rating:Essay Length: 555 Words / 3 PagesSubmitted: April 9, 2017 -
Digestive System
Purpose The digestive system prepares food for use by hundreds of millions of body cells. Food when eaten cannot reach cells (because it cannot pass through the intestinal walls to the bloodstream and, if it could would not be in a useful chemical state. The gut modifies food physically and chemically and disposes of unusable waste. Physical and chemical modification (digestion) depends on exocrine and endocrine secretions and controlled movement of food through the digestive
Rating:Essay Length: 1,011 Words / 5 PagesSubmitted: December 26, 2009 -
Digital Divide
In this new era of booming technology and endless possibilities of what cyber space brings to our fingertips, leads us to question whether it depresses our economic and social stature. Over half the United States is now enjoying the online capabilities , while millions of people all over the world join the online community every year. With many businesses and schools relying on the Internet, it is important as basic phone service. Cell phones, computers,
Rating:Essay Length: 396 Words / 2 PagesSubmitted: January 8, 2010 -
Digital Video Broadcasting Technology
1. Basic Principles Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion. Video technology was first developed for television systems, but has been further developed in many formats to allow for consumer video recording. Starting in the late 70s to the early 80s, several types of video production equipment- such as time base correctors (TBC) and digital video effects (DVE) units (two
Rating:Essay Length: 7,584 Words / 31 PagesSubmitted: February 6, 2010 -
Dimensional Argument Against the Snowball Earth Hypothesis
A most recent inquiry into climatic change during the ice age and it's possibility of reoccurring is the Snowball Earth Hypothesis advanced by Paul Hoffman of Harvard University. Snowball Earth Suggest that before the Ice age, continents ice free at the poles enhanced the reabsorption of carbon dioxide through erosion of silicate minerals, reducing the greenhouse effect making the earth colder until it reached a runaway point. This effect is Hoffman calls albedo, when the
Rating:Essay Length: 1,225 Words / 5 PagesSubmitted: February 17, 2010 -
Dinosaur Evolution
Evolutionary Concepts Defining Speciation: BSC and Recognition concept Species are produced by individual speciation events, so a single species concept can’t be defining all species. Hugh Paterson’s ideas are significant in understanding evolution. Paterson argues that speciation is not an adaptive process, but is a result of the adaptation of intricate bonding mechanisms to a new environment (Paterson). The conceptual basis of his research is the Recognition Concept of Species. He argues that the Biological
Rating:Essay Length: 769 Words / 4 PagesSubmitted: February 10, 2010 -
Direct Current Machine: Generalities
Direct Current Machine: Generalities A direct current rotating machine can operate indifferently as a generator or as a motor. In the first case it is called dyinamo, in the second one direct current motor. Its prevalent application is as a motor: there are applications of a medium-big power, with rated voltages of the order of the thousand of volt; there are also several applications of small motors. CAs it happens in the synchronous machine, the
Rating:Essay Length: 1,046 Words / 5 PagesSubmitted: April 20, 2010 -
Disadvantages of Cosmetic Surgery
Disadvantages of Cosmetic Surgery Warren St. John wrote an article about the death of a 42-year old Irish woman, Kathleen Kelly Cregan; her cause of death was having a face-lift in New York City. Mrs. Cregan told her husband that she was leaving only for business course in Dublin. Her family wasn’t aware that Mrs. Cregan left the country to have a surgery in New York. She supposedly wanted to surprise her husband with her
Rating:Essay Length: 647 Words / 3 PagesSubmitted: December 3, 2009 -
Disadvantages of Human Cloning
1. Health risks from mutation of genes - an abnormal baby would be a nightmare come true. The technique is extremely risky right now. A particular worry is the possibility that the genetic material used from the adult will continue to age so that the genes in a newborn baby clone could be - say - 30 years old or more on the day of birth. Many attempts at animal cloning produced disfigured monsters with
Rating:Essay Length: 700 Words / 3 PagesSubmitted: May 8, 2010 -
Disclosure of Information-Nursing
Disclosure of Information The health care professionals and their teams go through many ethical difficulties concerning issues of disclosure and truth-telling to their clients. It’s been a huge problem to make decisions about how, when, and whether to disclose the truth to the clients. This paper will be discussing a dilemma faced by a nurse whose client does not wish to know information that could have serious consequences for her newborn baby (Yeo & Moorhouse,
Rating:Essay Length: 3,165 Words / 13 PagesSubmitted: November 27, 2009 -
Discovering the Origin of Cosmic Radiation
The Earth’s atmosphere is being steadily bombarded with thousands of radioactive particles from the depths of space. Scientists have until recently been puzzled with the origin of these particles, but recent studies have found a likely source. With all the advances in technology since the discovery of these particles, we are finally close to determining where they come from, and subsequently how they are accelerated to such high energies. The first conclusive observation of cosmic
Rating:Essay Length: 1,059 Words / 5 PagesSubmitted: December 31, 2009 -
Discovery of Neptune
The Discovery of Neptune Neptune was discovered in September 1845. It was discovered by means of mathematics before being seen through a telescope. It began in 1843 when John Adams, a young English astronomer and mathematician, began working to find thew location of the unknown planet. Adams predicted the planned would be about 1.6 billion kilometres farther from the sun then Uranus. That’s when he completed his work in September 1845. Also Urbain Leverriar,
Rating:Essay Length: 323 Words / 2 PagesSubmitted: December 20, 2009 -
Discriminant Analysis of Metabolomics Data
1.1 Aims Metabolomics is a post genomic technology that seeks to provide a comprehensive profile of all metabolites present in a biological sample, the aim of which is to provide information about the organism or tissue under investigation. Characteristics in the 1H NMR spectra can be used for classification and comparison of samples. The identification and use of such traits is known as metabolic fingerprinting. However, the samples often contain thousands of metabolites making the
Rating:Essay Length: 305 Words / 2 PagesSubmitted: January 25, 2010 -
Discrimination
Treatment or consideration based on class or category rather than individual merit; partiality or prejudice: racial discrimination. Unfortunitly this is something that americans deal with every day. Weather it is at school, at work or even in a public space, racial discrimination has been haunting our nation for hundreds of years now.There are many factors that go into determining the path a person’s life may take; the most significant of these is the social class
Rating:Essay Length: 1,139 Words / 5 PagesSubmitted: December 6, 2009 -
Discuss the Male Reproductive System
Discuss the Male Reproductive System The reproductive system is questionably the body system that is the most important influence on life as we know it. It is the w ay in which we procreate and ensure our existence as a species. However, the penis is only one part of the male reproductive system, which constitutes of a series responsible for generating, storing, and transporting the genetic material contained in the sperm cells. The main organs
Rating:Essay Length: 1,785 Words / 8 PagesSubmitted: November 18, 2009 -
Discuss the Relationship Between the Retail Price of Gasoline and the Price of Crude Oil
The United States of America imports crude oil as well as gasoline every day, and since both represent commodities trade in the daily base around the world its price is determined by the supply and the demand. Usually many factors affect the price of gasoline and crude oil, per example a change in political issue, country's stability, driving habits, economy and weather, per example in August 31, 2005 when Hurricane Katrina hit Louisiana, Texas, and
Rating:Essay Length: 336 Words / 2 PagesSubmitted: May 6, 2011 -
Discuss the Way Gould Uses His Own Experiences to Make His Points
1.) Discuss the way Gould uses his own experiences to make his points. Writing about one’s own experiences is an effective method in conveying a point because it illustrates real life events which readers can relate to. Additionally, the intended audience is able to enter into the mindset of the author and understand the basis of their views or opinions. In the collection of essays from Hen’s Teeth and Horses Toes, Gould uses autobiographical elements
Rating:Essay Length: 515 Words / 3 PagesSubmitted: November 29, 2009 -
Discuss Your Medical Career Expectations as a Future Physician
As a potential medical student, I will strive to be a tremendous asset to St. Christopher’s College of Medicine by devoting all my time and life to becoming an excellent physician. I believe that I am obligated to use my talents in a constructive manner, in a manner that benefits society. The medical career gives me the unique opportunity to express my talents while benefiting human life. Undoubtedly my cultural diversity will be a great
Rating:Essay Length: 436 Words / 2 PagesSubmitted: March 13, 2010 -
Discussion and Practical Application of Interpersonal Relations in Nursing Theory
Discussion and Practical Application of Interpersonal Relations in Nursing Theory Hildegard Peplau’s Interpersonal Relations in Nursing, published in 1952, emerged before the thrust of nursing theory development. Educationally, nursing students were discouraged from theoretical learning. Nursing was not considered a profession in 1952. Rather, nurses were viewed as physician helpers, being called upon based on the physician’s assessment of the patient’s condition and the assistance deemed appropriate. Publication of Peplau’s book was delayed for four
Rating:Essay Length: 2,995 Words / 12 PagesSubmitted: June 2, 2010