... of producing an almost perfect polymer chain extension. The polymer poly-p-benzamide was found to form liquid crystalline solutions due to the repetitiveness of its molecular backbone. The key for the structural requirement for the backbone is para orientation on the benzene ring, which allowed for rod-like molecular structures. This technology was used when Du Pont released aramid fiber in 1971. What is it? Kevlar is an aramid, a term invented as an abbreviation for aromatic polyamide. The chemical composition of Kevlar is poly para-phenyleneterephthalamide, and it is more properly known as a para-aramid. Aramids belong to the family of nylons. Common nylons, ...
Words: 936 - Pages: 4
... only way to create the conditions where the it is possible to force these atoms together and override their repulsion is through enormous heat, this method is called thermonuclear. Even though fusion reasearch still needs a lot of time, there has been some progress in discovering how we can use this. The two fusion reactions that are the most promising both involve the heavier isotopes of hydrogen: 1) deuterium (composed of one proton and one neutron) Deuterium occurs naturally as a minor constituent in all hydrogen-containing materials--such as water--in quantities sufficient to meet all the energy needs of societies for many billions of years. 2) tritiu ...
Words: 865 - Pages: 4
... is why you cannot see them. The particles in a solution are evenly disturbed, or intermingled informally on a molecular level. A small sample of one part of a solution. The particles in a solution will not separate no matter how long the solution is allowed to stand under constant conditions. In a solution, one substance is usually considered to be dissolved, or broken down in another. The substance that is dissolved is called the solute. The substance that does the dissolving is the solvent. Not every substance dissolves in every other substances. A substance that dissolves in another substance is called soluble. Soluble means capable of being dissolv ...
Words: 543 - Pages: 2
... matter is not addressed soon it will be responsible for many casualties. Another branch of technology that has caused casualties in the past and is bound to cause many more in the future is weapons. The weapon that has had the most impact is the gun. It has killed millions, not only in wars, but in everyday life as well. In addition, there is the atomic bomb that killed thousands at Hiroshima. More recently there is the nuclear missile that is capable of wiping out an entire major city. Moreover, there are many inventions that have been built with the intent to improve life only to repeatedly take it away from people. Some such inventions are cars, planes ...
Words: 509 - Pages: 2
... description of his own personal experiences when he suffered from depression Over the course of the year, 17.6 million American adults suffer from a depressive illness. That is 10% of the population. (Pfizer, Dealing) Depression is a whole-body illness, including mind, mood, body, and thoughts. It effects everything from the way you sleep to the way you feel about yourself. It effects how you react and how you see things. Depressive illnesses often interfere with normal functioning and cause pain and suffering not only to those who have the disorder but also to the ones who care about them. Depression can rip apart families and destroy the life of an innocent per ...
Words: 1858 - Pages: 7
... for its wonder drug, possibly helping to prevent everything from heart attacks to certain types of cancer and even Alzheimer's disease. Aspirin: from willow tree to Nobel Prize Aspirin's active ingredient, acetylsalicylic acid (ASA), is the commercially synthesized form of a naturally occurring compound whose uses can be traced back 2,000 years. The compound, called salicin, is found in the white willow tree. Around 200 B.C., Hippocrates, the Greek physician, discovered that chewing on willow bark could relieve pain and fever. Although ASA was a proven pain reliever, no one really knew how it worked until more than 70 years after Hoffmann's discovery. I ...
Words: 607 - Pages: 3
... acid and ribonucleic acid DNA and RNA respectively. This is what has given science a great deal of doubt as this would give the dogma of the beginning of live a radical turn. Prions have been in research for many years with experiments like the one done by Stanley B. Pruiser and his team of scientists at the School of Medicine of the University of California at San Francisco in which a study was carried out on mice to see if he was able to purify the scrapie agent ,another prion disease, in mice. But mice as humans took very long to develope the disease, for example Gerstmann-Straussler-Scheinker disease or fatal familial insomnia, which appear mos ...
Words: 1715 - Pages: 7
... at the end. It had a major advantage with its internal guidence system, that was developed by The Massachusetts Institute of Technology. The CSM was made of two parts. The crew stayed in the Command Module, which had some couches and was pressurized with oxygen. Behind the CM was the SM or Service Module which had the main engine, which had 21,500lb. of thrust. The reaction control system , oxygen, fuel cells, hydrogen tanks, and envirnmental control systems. The main engine was only used for changes in course and changes in orbit and escape from the lunor orbit. When the crew came back for reentry the CSM would split. The Command Module had heat sheilding ...
Words: 538 - Pages: 2
... the balance of charge on objects is disturbed. An on an object that causes the object to attract or repel other objects is called static electricity. The adjective static describes something that does not move. Charges on an object are called static electricity to contrast then with the moving charges in an electric current. How can you disturb the balance of charge on objects so they exert electric force? The easiest way is the same way the ancient Greeks did it – by rubbing the 2 objects together. Rubbing neutral objects together allows charged pieces of matter to move from one object to another. The invisible bits of negatively charged matter that move b ...
Words: 587 - Pages: 3
... are "bad". But these outside effects are instantly noticeable and people can react badly to you and thus make immediate bad impressions on people that you need to make a good impression on. Be it with a teacher, someone who is interviewing you for a job, or simply someone you are trying to get romanticly involved with. Then there are the more harmful and insidious side effects of smoking. Such as lung cancer, cancer of the throat, and other health problems too numerous to mention. Lung cancer has become very common amoung smokers and it is known fully by most smokers that they are getting cancer sooner or later as long as they continue to smoke as if it is an ine ...
Words: 498 - Pages: 2
