Ion exchange

Fig. 4 shows the total and partial spin-polarized density of states (TDOS and PDOS, respectively) of the ZnxMn1−xO compounds. The TDOS results of the allowed ternary compounds, ZnxMn1−xO (x = 0.25, 0.50 and 0.75), show that they are half-metallic and ferromagnetic; this result occurs because in the valence band close to the Fermi level, the majority spins (spin-up) are metallic, and the minority spins (spin-down) are semiconductors. These compounds have a spin polarization of 100% of the conduction

If a cell is to perform its functions it must maintain a steady state in the midst of an ever changing environment. This steadiness is maintained by the regulation of movement of materials into and out of the cell. To achieve this control, cells are bounded by a delicate membrane that differentiates between different substances, slowing down the movement of some while allowing others to pass through. The membrane is said to be differentially permeable since not all substances penetrate equally well

Water is the most important substance on earth, all plants, animals and humans must have water to survive. Chemically, water is a compound made of two hydrogens covalently bonded to the single oxygen atom, which forms the chemical/ molecular formula 0. In nature, water appears in all three common states of matter and takes many different forms on Earth: water vapour and clouds in the sky, seawater and icebergs in the polar ocean and glaciers and rivers in the mountains. Water is tasteless, does

Review Paper on Microfluidics Shreyas Shah San Diego State University San Diego, CA, USA smsvapi@gmail.com Dr.Samuel Kassegne San Diego State University San Diego, CA, USA kassegne@mail.sdsu.edu Abstract—Accurate and high throughput cell sorting enabling technology in molecular and cellular biology, biotechnology and medicine. We classify these technologies as either active or passive. Active systems generally use external fields (e.g., acoustic, electric, magnetic, and optical) to impose forces

Abstract The reasoning behind this experiment was to be able to specify which molecules are capable of transporting in and out of the cell through the process of diffusion. Diffusion is the process where molecules move from a level of high concentration to low concentration and eventually stops once the equilibrium is reached. This study was able to demonstrate that glucose, starch, and silver nitrate were all existing at different amounts. Results began to show after around 40 minutes, but when

In this lab, we balanced the equation xZn(s) + yHCl(aq) → ZnxCly (s) + y/2H2(g) by the information obtained from the lab. When zinc and hydrochloric acid are mixed together, the reaction took place in an evaporating dish that was accompanied by hydrogen gas. Then we measured out the mass of zinc and chlorine in the reaction and calculated the empirical formula of zinc chloride which was ZnCl8. Based on the conservation of mass, we balanced the equation and got Zn(s) + 8 HCl (aq) → ZnCl8 (s) + 4 H2

Introduction Rust, also known as iron (II) oxide, occurs when iron is exposed to oxygen and moisture for a long period of time. This reaction is called oxidation. Oxidation can occur on old cars, iron, exhaust and even the burning of fossil fuels. When wood, natural gas, or coal burns, the oxygen in the air combines with the carbon and hydrogen in the fuel to produce water and the oxides of carbon.(Prentice Hall Chemistry The Study of Matter p.599.) Rust may seem like an average everyday phenomenon

Cole Powlison December 15, 2014 Mr. Gattis Pre-AP Chemistry-5 Discovering the Properties of Different Objects’ Matters and Densities Group Members: Cole Powlison and Cade Andrews Due Date: December 17, 2014 Purpose: The purpose of this lab is to explore the properties of both density and matter in an object. Materials: • One Triple Beam Balance • Sodium Chloride • Sucrose • One Aluminum ball (tin foil) • One Spoon Procedures: 1. A spoonful of sodium chloride was placed on the balance, then measured

Lab Report 1  Introduction: Proper chemical formulas entitle many challenges such as the Law of Multiple proportions that states that there may be more than one plausible mole ratio for the elements in that compound. However if we determine the mass of each element in the compound we will be able to get the true chemical formula. In this experiment, we used the law of definite proportions to find the chemical formula for a hydrated compound containing copper, chlorine, and water molecules

substance. When these crystals react with water they split into positive ammonium ions and negative nitrate ions. Due to the energy expended by the water in order to dissolve these crystals, the water becomes colder. Chemical Reaction Ammonium nitrate (NH4NO3), is classified as a salt. The salt family of chemicals contains ions, which are particles with electrical charges. Due to the fact that opposite polarity ions attract each other, they form a solid crystal that is called salt. This when seen