The melting point for lauric acid in this experiment was 50℃. Explain what is happening during each section of the graph for both cooling and heating in terms of particle motion and energy. When heat is added to a substance the particles in the substance vibrate faster and when vibrate faster the space between the particles increases. The hotter it gets the more the object expands and takes up more space. When a substance is cooled the particles vibrate less causing them to constrict and take up less space.
Acetic acid (CH3COOH) and formaldehyde (HCHO) can be obtained by processing methanol and is also used for petrol bending (petroleum derived liquid). A large proportion of methanol is used to make motor spirit, vinyl acetate, acetic anhydride these chemicals is used for the manufacture of adhesives, coating, photographic film, synthetic fiber, synthetic rubber and thermoplastic and mainly the methyl-tertiary butyl ether (MTBE) which reduces “knock” and also the proportion of CO and hydrocarbon in the exhaust. we can produce various aromatic hydrocarbons and alkanes suitable for petrol (hydro carbon with five to eight carbon atoms ) by throwing the stream of vapour over alumina at temp. around 600 kelvin. An equilibrium mixture of methanol, dimethyl ether and water is produced which has 25 percent methanol.
After the finalization of alkali formulation to be used for extraction of cornhusk fibres, the fibres were treated with Pulpzyme HC to increase their fineness. Pulpzyme HC is a xylanase enzyme (EC.184.108.40.206) produced by submerged fermentation of a genetically modified Bacillus microorganism, and was obtained from Novozymes. The enzyme has an activity of 1000 AXU per gram. (http://fzfz.nbdl.gov.cn:81/files/20130815/1376527490502_36.pdf) Effect of concentration of Pulpzyme HC and Treatment Time The extracted fibres were treated with three different concentrations of enzyme i.e. 1%, 3%, 5% (owf).The time taken for treatment was 30 minutes, 60 minutes and 90 minutes.
Stability and Storage Conditions: Hypromellose powder is a stable material, although it is hygroscopic after drying. Solutions are stable at pH 3–11. Aqueous solutions are comparatively enzyme-resistant, providing good viscosity stability during long-term storage. However, aqueous solutions are liable to microbial spoilage and should be preserved with an antimicrobial. 5.4.
As currently prescribed, CC is a racemic mixture of two distinct stereoisomers, enclomiphene and zuclomiphene, having different properties. Available evidence indicates that enclomiphene is the more potent isomer and the one primarily responsible for the ovulation-inducing actions of CC. Levels of enclomiphene rise rapidly after administration and fall to undetectable concentrations soon thereafter. Zuclomiphene is cleared far more slowly; levels of this less active isomer remain detectable in the circulation for more than 1 month after treatment and may actually accumulate over consecutive cycles of
The magnetic cooling technology based on the use of the Magneto-caloric Effect applied to various metallic materials and new alloys named Magneto-caloric Materials used as the refrigerant . The Magneto-caloric Effect (commonly abbreviated as MCE) is one of the most fundamental physical properties of the Magnetic Materials. The magnetic cooling technology (MCE) represented the comportment of a magnetic matter when it exposed to a changing magnetic field. Thus, its temperature may increase or decrease, with both the sign and the extent of the temperature difference between the final and the initial states of the material, dependent on numerous intrinsic and extrinsic factors. The chemical composition, the crystal structure, and the magnetic compound states are among the most significant substantial parameters that determine its MCE .
2.EXPERIMENTAL 2.1. Materials Hydroxyethyl cellulose (HEC) as membrane material was purchased from Sigma Aldrich. Levulinic acid (LA), ethanol, phosphoric acid, sodium hydroxide was obtained from Merck Chemicals. The catalyst tungstosilicic acid hydrate and solvent isopropanol were supplied by Sigma Aldrich. 2.2.
The Physico-chemical mechanism reviewing the composition of one or more polymers with one or more surfactants has the effect of colloidal stability, emulsification, flocculation structuring and suspending properties, rheology control and synergistic effects and formation of micro heterogeneous system . Surfactants forms aggregate in aqueous solution as micelles. The micelle formation takes place over a narrow range of surfactant concentration is called Critical Micelle Concentration(CMC) and with different changes in various physical properties like viscosity, surface tension, osmotic pressure solubilisation capacity, electrical conductivity etc. for a wide variety of solutes. At the CMC, the formation of polymer-surfactant molecular aggregation begins at first with formation of small micelles and grows rapidly over a higher concentration range attains stabilization for a given surfactant concentration.
L. (TECNAN). Lastly, water (HPLC grade) was purchased from Scharlab S.L. All chemicals were used as received and used without further purification. Due to the current research trend that aims to develop the catalytic application of molybdenum carbide, processing and synthesizing these materials in powder form have been continuously gaining importance. Conventionally, these materials can be produced in powder metallurgy route; however, its high processing cost is a disadvantage.
The temperature dependent dielectric properties of polymers and material constituents are rarely found in literatures. Furthermore, the simulation of accurate process also needs the information of temperature dependency of microwave properties. Polymer composites gain great interest in current research since the composites have broad range of application, such as for packaging, medical, electronic and automotive application. The focus of current research is to find composite materials with certain characteristic that cannot be achieved in single material. The advantages, such as enhanced mechanical strength, lighter weight and higher temperature resistance can be