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.
4,610 Essays on Science. Documents 3,361 - 3,390
-
Restrictions for Donating Blood as Stated by the American Red Cross
Restrictions for Donating Blood as Stated by the American Red Cross It is said that 70% of Americans are eligible to give blood even though the criteria to donate seems quite strict. Each case is treated individually based on why the person is donating. An autologous donor is one who is giving blood to use for them self if needed during a future surgery. All others are anonymous donors who donate blood for others to
Rating:Essay Length: 561 Words / 3 PagesSubmitted: January 8, 2010 -
Result of Observation
Result of Observation Chemical name and symbol Physical appearance Cation of the compound Flame color NaNO3Sodium nitrate Colourless crystal Na+ Yellowish Orange NaClSodium chloride Colorless crystal Cl+ Yellowish Orange LiNO3Lithium nitrate Colorless crystal Li+ Red BaNO3Barium nitrate White crystal BaІ Bright yellow, lime yellow Sr(NO3) 2Strontium nitrate White crystal SrІ Dark red Cu(NO3)2Cupric nitrate Blue crystal CuІ Green, bluish green. Ca(NO3) 2Calcium nitrate White crystal CaІ Redish orange KNO3Potassium nitrate Colourless crystal. K+ Light
Rating:Essay Length: 1,068 Words / 5 PagesSubmitted: November 28, 2009 -
Rethinking Uses of Marijuana
Recently, both California and Arizona took the long needed initiative and approved the use of marijuana for medical purposes. The California bill says that patients may use marijuana with a doctor's recommendation. It does not, however, allow doctors to prescribe the drug. Arizona voters passed a bill that swings out even further to the left than California's. Voters in Arizona think that people should be able to use any illicit drug for bona fide medical
Rating:Essay Length: 683 Words / 3 PagesSubmitted: November 9, 2009 -
Retinitis Pigmentosa
Retinitis Pigmentosa Retinitis Pigmentosa is the name given to a group of inherited eye disorders that affect the retina. The retina has rod shaped cells responsible for night vision and seeing in the dim light. The cone-shaped cells are responsible for color vision and brightness Retinitis Pigmentosa has been proven to be progressive, destructive, hereditary disease that reduces the function of rod-shaped cells. Retinitis Pigmentosa can eventually lead to severe vision loss and blindness. Retinitis
Rating:Essay Length: 454 Words / 2 PagesSubmitted: December 8, 2009 -
Retirement Decision
“The Retirement Decision” Decision Summary: I am at the 17.5 year point in my career and need to decide if I want to stay in the Navy past 20 years or retire and pursue other interests. My naval career to date has been successful and I consider myself competitive for promotion to O-6. However, I am not hard over on being a Navy Captain. In fact, considering the family ramifications of becoming a Captain in
Rating:Essay Length: 2,028 Words / 9 PagesSubmitted: November 20, 2009 -
Reverend Hale's Catharsis in the Crucible
“The sun will rise…” (pg 233). The rising of the sun is symbolic for a new beginning or enlightenment. This statement foretells of the enlightenment and transformation Reverend Hale undergoes throughout the course of the play. Depicted at first as a strong intellect, one can see that he undergoes a catharsis due to his compassionate and benevolent nature seen towards the end of the play. When Reverend Hale is first introduced to the play, he
Rating:Essay Length: 644 Words / 3 PagesSubmitted: November 25, 2009 -
Review of P53 Research
Ventura A et al. Restoration of p53 function leads to tumour regression in vivo. Nature. 2007 Feb 8;445:661-5. 1. “Loss of p53 function may not only play a role in the early stages of tumor development, but also be required for the continued proliferation or survival of an established tumor.” (Ventura 661) is an explicit hypothesis in this paper. 2. Increase in tumor volume can be predicted in tumors where p53 remains inactive. Tumor regression
Rating:Essay Length: 402 Words / 2 PagesSubmitted: March 27, 2010 -
Review Of: Engineering, Biology, and Nanotechnology
Article: Engineering, Biology, and Nanotechnology Written by Chris Phoenix, CRN Director of Research (CRN stands for Centre for Responsible Nanotechnology) Date published: April 2004 Source: The Internet Web page: http://www.crnano.org/essays04.htm, Summary The author thesis statement is to discuss how Engineering and Biology compete and combine to form the relatively new science called Ў§NanotechnologyЎЁ. The methodology used by the writer, member of CNRЎXCenter for Responsible NanotechnologyЎX, is mostly the exemplification of the concepts, stating differences and
Rating:Essay Length: 1,207 Words / 5 PagesSubmitted: November 17, 2009 -
Review: “strongest Proof Yet of Water Flows on Mars”
New York Times Article “Strongest Proof Yet of Water Flows on Mars” This article is about the resent NASA developments in their Mars exploration and research. Scientist have been trying to find signs of water or ice on the planet for many years now but this is some of the best evidence yet. They would like to find water because with a little amount of heat source, there is a good chance microbial life can
Rating:Essay Length: 292 Words / 2 PagesSubmitted: January 2, 2010 -
Rfid Getting It Personal
ABSTRACT Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. One of the two main parts is an integrated circuit for storing and processing information, modulating and demodulating a (RF) signal, and other specialized functions. The second is an antenna for receiving and transmitting the signal. A technology called chip less RFID allows for discrete identification of tags without an integrated circuit,
Rating:Essay Length: 261 Words / 2 PagesSubmitted: February 14, 2010 -
Rhetorical Analysis of a Formal Observation Report in the Sciences
Rhetorical Analysis of a Formal Observation Report in the Sciences A good scientific writing allows for future study and survey of the experiment, meaning that it provides sufficient information for future scientist that may try to recreate the experiment for future knowledge. In Engaging Inquiry: research and writing in the sciences by Kirscht and Schlenz, there is a format one can use to determine a good scientific writing. This format is IMRAD, an acronym for
Rating:Essay Length: 1,404 Words / 6 PagesSubmitted: November 14, 2009 -
Rheumatoid Arthritis
Rheumatoid Arthritis or (RA) is an autoimmune disease that attacks the joints and connective tissue. The result is inflammation that produces permanent damage in the joints. Rheumatoid arthritis is a chronic syndrome that tends to be progressive and destructive as compared to Osteoarthritis or (OA), which is more of an age related disease caused by “wear and tear” of the joints. In contrast to (OA), rheumatoid arthritis is characterized by inflammation mostly of the
Rating:Essay Length: 1,091 Words / 5 PagesSubmitted: January 20, 2010 -
Rheumatoid Arthritis
Rheumatoid arthritis is an autoimmune disease that sauses chronic inflammation of the joints. Rhematiod arthritis can also cause inflammation of the tissue around the joints, as well as other organs in the body. Autoimmune diseases are illnesses which occur when the body tissues are mjistakenly attacked by its own immune system. The immune system is a complex organization of cells and antibodies designed normally to “seek and destroy” invaders of the body, particularly infections.
Rating:Essay Length: 459 Words / 2 PagesSubmitted: February 26, 2010 -
Rheumatoid Arthritis - an Inflammatory Disease
Rheumatoid arthritis is an inflammatory disease, primarily of the joints, with autoimmune features and a complex genetic component. INHERITANCE Occasional families show a considerable number of cases of this common disorder. A simple Mendelian mechanism could not be proved, however. Indeed, some (Burch et al., 1964) could not demonstrate significant familial aggregation. Lynn et al. (1995) conducted family studies and segregation analyses of RA based on consecutive patients with RA ascertained without regard to family
Rating:Essay Length: 1,364 Words / 6 PagesSubmitted: June 4, 2010 -
Rhodophyta and Its Kingdom
Rhodophyta and its Kingdom The Rhodophyta also known as Red Algae, are found in tropical marine climates, and there are more then 5200 species of Rhodophytes. They are part of the Protista kingdom, which consists of three groups, alga which rhodophyta belongs to and, the other two groups are protozoans, and fungi. Nutritional Characteristics Rhodophyta are autotrophs as they can make their own food through photosynthesis. They absorb blue light wavelengths that shine in deep
Rating:Essay Length: 726 Words / 3 PagesSubmitted: February 11, 2010 -
Richard Feynman
Richard Feynman 1602 bliss hill Savory heaven, 00000 I first heard of you in April of 1999. I was doing some research on time travel and asked a colleague if he happened to have some broad-ranged books on physics. He handed me a book entitled "The Feynman Lectures on Physics." I was unfamiliar with the book or you but read through it to see if there was any information I could use. There was a
Rating:Essay Length: 1,133 Words / 5 PagesSubmitted: November 20, 2009 -
Ring of Fire
I think the basic point of the video was to symbolically compare the actual Ring of Fire, the horseshoe shaped area lined with volcanoes and earthquakes that line the Pacific, to an actual “ring” that starts at one place, goes through a transition, and comes back “full circle” to start anew. Three main themes in the video were “Life is Reappearing”, “Paradise and Catastrophe” and “Creation and Destruction”; all deal with starting at one point,
Rating:Essay Length: 382 Words / 2 PagesSubmitted: November 11, 2009 -
Rip Currents
Rip currents are responsible for about 150 deaths every year in the United States. In Florida, they kill more people annually than thunderstorms, hurricanes and tornadoes combined. They are the number-one concern for beach lifeguards: About 80 percent of all beach rescues are related to rip currents. Despite these startling statistics, many swimmers don't know anything about rip currents, and they have no idea how to survive when caught in one. In this research paper
Rating:Essay Length: 1,198 Words / 5 PagesSubmitted: March 26, 2010 -
Risk Assessment
Risk Assessment As a member of the Grenericville city council, my vote is to vote against the use of the insecticide spray Malathion. Yes, Malathion is a pesticide, and a powerful one at that. Malathion is a chemical and the impact it has on society’s health is almost as great as impact of mosquito-borne diseases, like the West Nile which Genericville also has reported cases of every summer. According to a study done in
Rating:Essay Length: 720 Words / 3 PagesSubmitted: March 29, 2010 -
Risk Assessment
Assignment: Risk Assessment Currently Genericville city council has been debating a proposal regarding the use of the pesticide Malathion within the city. This proposal has been brought up due to the increase in West Nile Virus within the city. The city council is now responsible to make an informed decision that would be in the best interest of the residents of the city, as well the tourist population that visits during the summer. A season
Rating:Essay Length: 886 Words / 4 PagesSubmitted: August 15, 2010 -
Risk Assessment for the Malathion Program
Risk Assessment for the Malathion Program After reviewing the statistics and toxicological information in regards to the pesticide Malathion, I vote to implement the application of this pesticide to the city of Genericville. As the opponents to this procedure have a valid argument, I on the other hand, feel that this will have a more positive benefit in the long run. I performed a risk assessment for adverse health effects on the pesticide. My results
Rating:Essay Length: 529 Words / 3 PagesSubmitted: May 12, 2010 -
Risks Management of Gmos in Usa and Eu Opportunities for Implantation in Less Favoured Countries
INTRODUCTION Genetically modified organisms (GMOs) have been introduced in the agricultural system and on the market of consumer goods since about 20 years, initially in the USA but also increasingly in developing countries. Since the discovery of genetic engineering, with its potential to modify DNA of living organisms, discussion and controversy have been abundant. Europe has witnessed a particularly strong resistance to the introduction of GMOs in agriculture and for consumer food products, both from
Rating:Essay Length: 2,752 Words / 12 PagesSubmitted: May 26, 2010 -
Ritalin May Trigger Long-Term Brain Cell Changes
Ritalin May Trigger Long-Term Brain Cell Changes Kids all over the country take Ritalin to relieve symptoms of attention deficit hyperactivity disorder. The drugs use has dramatically increased since first appearing on the market in 1980. Now how many college students get restless and bored when certain teachers drone on and on in their lectures. Lets face it some people can not present the work in an interesting enough way to keep our attention.
Rating:Essay Length: 455 Words / 2 PagesSubmitted: February 14, 2010 -
River out of Eden
River Out of Eden River out of Eden is a book that focuses on Charles Darwin’s theory of evolution. It’s author, Richard Dawkins has also written other books on evolution such as The Selfish Gene, The Blind Watchmaker, and The Extended Phenotype. In the book River Out of Eden, Dawkins relates life to being a river of genes that flows through time and how genes use organisms as temporary bodies to live in. So even
Rating:Essay Length: 291 Words / 2 PagesSubmitted: February 16, 2010 -
Robotic Surgery
Robotic Surgery is the use of robots in performing surgery. ”Surgery is performed by manipulating straight instruments while viewing the instruments on a monitor. Robotic surgery is the evolution of laparoscopy that addresses the drawbacks of laparoscopy”(NJ urology).Considering the never ending improvement of technology, this type of surgery is being used more by a day worldwide and has a potential to totally take over the field of surgery. However, as robotic surgery has its
Rating:Essay Length: 1,398 Words / 6 PagesSubmitted: December 9, 2009 -
Robotics
Outline I. The world of robotics includes a wide variety of robots and robotic technology. A. Did you know that with robotics you can turn a disposable camera into a taser gun? B. Robotics have become part of the modern age we live in and will see us far into the future. 1. Industrial Robotics 2. Government Robotics 3. Household Robotics II. Industrial Robotics A. High Tech Robotics 1. Relations to Government Technology 2. Uses
Rating:Essay Length: 1,918 Words / 8 PagesSubmitted: January 25, 2010 -
Rock
John Davison Rockefeller (July 8, 1839 - May 23, 1937) was the guiding force behind the creation and development of the Standard Oil Company, which grew to dominate the oil industry and became one of the first big trusts in the United States, thus engendering much controversy and opposition regarding its business practices and form of organization. Rockefeller also was one of the first major philanthropists in the U.S., establishing several important foundations and donating
Rating:Essay Length: 309 Words / 2 PagesSubmitted: February 19, 2010 -
Rock Candy
Observations: *Many crystals formed at the bottom of the jar as well as on the string *Thick layer of crystals on the bottom of the jar *More/thicker crystallization around the paper clip area *Equal width/size around the string *Higher altitude of crystals only on the right half of the jar *Slight crust of crystallization on the top solution (along the rim of the jar) *Solution without movement/stiff and very viscose Discussion Questions: 1. Why does
Rating:Essay Length: 461 Words / 2 PagesSubmitted: March 14, 2010 -
Rocket Fuel
This article deals with a theorized, substantial improvement to rocket science, particularly in relation to fuel. The theory is then explored in detail pertaining to how we would go about producing this new fueling method, the statistical improvements that would be made with this so far theoretical fuel, and how exactly it would be applied to the rockets themselves. This new component is an alternate phase of the most abundant element in our known universe:
Rating:Essay Length: 1,507 Words / 7 PagesSubmitted: October 5, 2015 -
Rocks
Earth’s Rocky Surface I. Igneous Rocks Characteristics of Igneous Rocks ●Igneous rocks may contain crystals, which frequently can be seen by the naked eye. ●Some igneous rocks contain no crystals and appear glassy. ●Igneous rocks may be found in many colors and often show different-colored crystals that are not in bands. The following are igneous rocks in the collection. Read each characteristic and identify each rock. Write the name of the rock in the table.
Rating:Essay Length: 636 Words / 3 PagesSubmitted: March 1, 2010