quite solid‚ neither is it a liquid. Liquid crystals are another important intermediate phase which exhibits features from both the solid and the fluid state. Liquid crystals have the ordering properties of solids but they flow like liquids. Liquid crystalline materials have been observed for over a century but were not recognized as such until 1880s. In 1888‚ Friedrich Reinitzer (picture) is credited for the first systematic description of the liquid crystal phase and reported his observations when
Premium Liquid crystal
drugs or drinks. This problem can be a physcological issue or a physical issue. Crystal meth is very powerful an addictive stimulant which allows the user to feel superhuman and be able to take care of any task at hand. How challenging is it to break Crystal Meth Addiction? . Statistics show‚ there were no proven treatments for Crystal meth addicts. In a survey conducted‚ 50% of participants said they were aware of meth addiction treatments but a rather large 40% said they were not. Having said that
Premium Drug addiction Addiction Heroin
Crystal Meth It is sometimes called speed‚ uppers‚ crank‚ chalk‚ ice‚ glass‚ copilots and Christmas tree‚ however it’s most commonly known name is crystal meth‚ scientifically known as methamphetamine or methyl amphetamine. One of the earliest uses of crystal meth was during World War II when the German military introduced it under the name Pervitin. It was given to elite forces‚ tank crews‚ and aircraft personnel in doses of chocolate‚ gaining the name copilots. In 1983‚ laws were passed prohibiting
Premium Methamphetamine Heroin Amphetamine
LIQUID CRYSTALS Introduction What are Liquid crystals ? Its History & Discovery Any of various liquids in which molecules are regularly arrayed like a solid crystal along one or two dimensions‚ but are free in the other dimensions as with typical liquids. Liquid crystals often display unusual and often manipulable optical properties such as anisotropic scattering. They can be divided into two classes‚ Thermo tropic(nematic‚ chiral nematic‚ and smectic.) and Lyotropic. Transitions to thermotropic
Premium Liquid crystal
One of the major stigmas with purchasers of crystal meth‚ is that only freaks‚ low income and homosexual men . The truth is that a vast array of people from all different specs of society are using and purchasing this deadly drug. College students to stay awake and study‚ maybe even the stockbroker you hired to invest your money for you. Methamphetamine is a highly addictive drug that can be manufactured by using products commercially available anywhere in the United States. So‚ in fact many middle
Premium Drug addiction Methamphetamine Heroin
CH1105: Materials Science Crystal Structure Assoc/Prof Timothy Tan Office: N1.2 B2-34 B2Tel: 6316 8829 E-mail: tytan@ntu.edu.sg Semester 1‚ 2013-2014 2013School of Chemical and Biomedical Engineering Why study structure of crystalline solids? To understand how atoms assemble geometrically into solid structures To describe the structure of solids To relate material properties to its structure 2 Energy and Packing Dense‚ regular packing Energy typical neighbor bond length typical
Premium Crystallography Crystal system Crystal structure
Crystal Research Paper A crystal is made up of the same materials that a regular glass is made of‚ such as silica‚ soda‚ and lime‚ but the addition of lead oxide is what gives crystals their shine. A bead has to have 24% lead oxide added to qualify as leaded crystal. Contrary to the popular belief‚ crystals have been around for a long time. Ancient Egypt‚ Rome‚ and other groups have all used crystals for various purposes. It was used in medicine‚ magic and rituals‚ as offerings and currency‚ as
Premium Crystal Chemistry Crystal structure
resulted in a much lighter coloration than the crude acetaminophen. Purified acetaminophen was slightly light tan/pink nearly white‚ whereas crude acetaminophen was light brown. After crystallization of acetaminophen‚ 0.028g of whiter‚ shiny‚ fine crystals resulted with no apparent odor. Slightly less than half of product was lost from 0.060g purified acetaminophen that was crystallized and about 0.122g was lost from the original 0.150g of p-aminophenol started with. The melting point range of the
Premium Crystal Paracetamol Acetic anhydride
Crystal Needles: Crystal Needles are a great introduction to crystal growing. You can have some delicate‚ really cool crystals going within three hours time! Ingredients: •a cup or small bowl •1/2 cup Epsom salt (magnesium sulfate) •1/2 cup hot tap water •(optional) a drop of food coloring Directions: 1.Add the ingredients together in your bowl or cup. 2.Stir the solution until all the salt is dissolved. There may be some crystals still at the bottom‚ but that’s ok. 3.Place the cup
Premium Sugar Water Sucrose
Liquid Crystal Displays (LCD) – Working We always use devices made up of Liquid Crystal Displays (LCDs) like computers‚ digital watches and also DVD and CD players. They have become very common and have taken a giant leap in the screen industry by clearly replacing the use of Cathode Ray Tubes (CRT). CRT draws more power than LCD and are also bigger and heavier. All of us have seen an LCD‚ but no one knows the exact working of it. Let us take a look at the working of an LCD. We get the definition
Premium Liquid crystal