3.6. Conclusion Various solvent extracts from mahua flower and fruits showed varying degrees of antioxidant activity in different test systems in a dose-dependent manner. The antioxidant activity was correlated with the amount of total phenolics present in the respective extracts in each assay. 50% acetone proved to be the most efficient solvent for extraction of antioxidants from mahua as the related extract contained the highest amount of phenolic compounds and also exhibited the strongest antioxidant
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7.3 Flow Rate and Viscosity (pg 153) Q1. If the flow rate in a pipe is 2 L/s‚ what does that tell you about how fast the water is moving. A1. It tells me that the water is moving fast through the pipe at 2 litres per second. If there were 60 seconds you would have 120 litres. Q2. When you tip a bottle of syrup upside down‚ it takes a longtime for all the syrup to pour out. Explain this using the terms “viscosity‚” “cohesion‚” and “adhesion.” A2. Syrup takes a long time to empty
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I. Lubricants selection and Application A.Viscosity Most important property of any lubricant is viscosity. A common mistake when selecting a grease is to confuse the grease consistency with the base oil viscosity. Because the majority of grease-lubricated applications are element bearings‚ one should consider viscosity selection for those applications. While most would not use an EP 220 gear oil for an oil-lubricated electric motor bearing‚ many people will use a grease containing that same oil
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Grading System 2012-13 CM- 601 – Process Equipment Design - I Unit I Mechanics of materials: Stress- Strain relationships of elastic materials subjected to tensile‚ compressive and shear forces‚ Elastic and plastic deformation‚ General design considerations; Design of shell‚ bottom plates‚ self supported‚ and column supported roofs‚ wind girder‚ nozzles and other accessories. Unit II Unfired pressure vessel: Pressure vessel codes‚ classification of pressure vessels‚ Design of cylindrical and
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and pharmaceuticals‚ It was discovered by accident in 1965 when James Schlatter‚ a chemist of G.D. Searle Company‚ was testing an anti-ulcer drug. Aspartame is comprised of 40 percent aspartic acid‚ 50 percent phenylalanine‚ and 10 percent methanol. Aspartic acid acts as a neurotransmitter‚ and too much can actually over-excite the cells‚ thus stimulating them to death. The blood brain barrier cannot prevent this in many‚ as it does not fully protect all areas of the brain‚ especially in people
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TITLE: Ball mill grinding. INTRODUCTION Indeed the ball milling means‚ the reduction of particles to smaller sizes with the help of a ball mill. It can be done in two ways. They are‚\ Dry milling Wet milling Generally‚ this has porcelain or steel ball as the grinding media. Commiution is occurred by several methods in the ball mill grinding. They are compression‚ impact and shear between the moving grinding media and the particles. The rate of this depends on some factors. These
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2‚ we were investigating why the liquids Ethanol‚ Propanol‚ Water‚ Pentane and Acetone evaporate at different rates. Methanol and Butanol were not liquids investigated by our group‚ but collectively as a class we were able to record averages of rates of evaporation. Solvent Molecular Formula Boiling Point (C°) Polar or Nonpolar Intermolecular Force(s) Lewis Dot Structure Methanol CH4O 64.7 Polar Hydrogen Bonding Dipole-Dipole London Dispersion Ethanol C2H6O 78.37 Polar Hydrogen Bonding Dipole-Dipole
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used. 9. The average density of a penny was calculated at 6.8462g mL. Observations: The unknown liquid that was classified as Methanol was clear in color and had no scent. The recorded data for all 4 procedures for trial 1 differed from trial 2‚ respectively. These differences for the density were used to calibrate the average density data for the water‚ seawater‚ methanol and the pennies. Part III. Results and Discussion: In spite of the fact that density relates two distinct sorts of measurements
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population limits the space available in landfills. Municipal and industrial waste biomass is often rich in organic matter‚ allowing for the creation and use of biofuels as an energy source. This organic matter can be used to synthesize ethanol‚ methanol‚ and biodiesel through the conversion of inorganic compounds into energy-producing organic carbon compounds. Moreover‚ unlike fossil fuels‚ which take millions of years to form‚ these organic carbon compounds are formed relatively quickly. Biofuel
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Centre Number Surname Other Names Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Education Advanced Level Examination January 2011 1 2 3 Chemistry Unit 4 Kinetics‚ Equilibria and Organic Chemistry 9.00 am to 10.45 am Wednesday 26 January 2011 CHEM4 4 5 6 7 For this paper you must have: ● the Periodic Table/Data Sheet‚ provided as an insert (enclosed) ● a calculator. TOTAL Time allowed ● 1 hour
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