I. Ibrahium Department of Food Science and Technology‚ Faculty of Agriculture‚ AL-Azhar University‚ Cairo‚ Egypt Abstract: This work aimed to evaluate the efficiency of different organic solvents such as‚ methanol‚ ethanol‚ dichloromethane‚ acetone‚ hexane and ethyl acetate for extraction of ( flavonoids and polyphenolic compounds(TFC and TPC respectively) from the orange peel. Also‚ the effect of these solvents on the yield percentage‚ chelating activity‚ antioxidant/radical scavenging capacity
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solvent because a solvent that has a strong interaction with a chemical will easily over come attraction from the chemical for the absorbent layer and move that chemical in a given period of time. Materials Food Coloring (solute) Ethanol‚ Acetone‚ Tap Water‚ Distilled Water(solvents) Pencil Ruler Scissors Filter Paper Petri Dish Variables Independent: Type of chromatography solvent Dependent: Retention in paper chromatography Controlled: Type of Chromatography paper
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P6- Describe different types of energy transfer For us to do work‚ we need energy. Energy is measured in joules‚ (J) or kilojoules (kJ) Energy exists in many different forums such as Kinetic and potential energy – Kinetic energy is the movement of energy and potential is stored energy‚ energy ready to go. A lawn mower filled with gasoline‚ a car on top of a hill‚ and students waiting to go home from school are all examples of potential energy. Gravitational potential energy is the energy crazed
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Marissa Arias Senior Rhetoric Graf-8 April 14‚ 2014 Gel II Manicure Many women and even some men love to get their nails done‚ but hate how much time it takes to dry and on top of that they are extremely easy to ruin and chip. There is a new type of manicure trending know as Shellac‚ Gel nails‚ or No chip. According to my cosmetology instructor Samantha Rudman‚ this process takes about 35 to 40 minutes but dries in seconds. Many individuals would love to know this process even the men that
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The mechanism begins with elimination of chlorine from Ru complexes and form Ru-iso-propoxide species which is undergo β-hydride elimination leads to form ruthenium metal hydride species with the release of acetone. Insertion of ketone to Ru-H species‚ resulting formation of secondary alkoxide which is undergoes alcohol metathesis to give the alcoholic product and regenerate the original
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Lab 106 Static and Kinetic Frictions Objectives: Our objectives are to measure the static and kinetic frictional forces using force sensors. Also‚ to determine the coefficient of static and kinetic frictional forces‚ amd the relationship between the frictional forces. Background/Sketch: **attached** Data Analysis: Cart= 82.45g Normal (N) Static (N) Kinetic(N) 100g 1.78 0.63 0.477 200g 2.76 0.83 0.716 300g 3.74 1.19 1.163 400g 4.72 1.67 1.520 500g 5.71 1.79 1.699 600g 6.69 1.88 1.670 1.00kg
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If you push for an hour against a stationary wall‚ you do no work A) on the wall. B) at all. C) both of these D) none of these 2) If you push an object twice as far while applying the same force you do A) twice as much work. B) four times as much work. C) the same amount of work. 3) If you push an object just as far while applying twice the force you do A) twice as much
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1.0 PURPOSE: To establish a procedure for check in and out for washing and the piston filler assembly. 2.0 SCOPE: This procedure applies to Maintenance‚ Sanitation and Production Departments. 3.0 RELATED PROCEDURES: ALL-SSOP-002-00‚ GMPS‚ and GDP’s. 4.0 RESPONSIBILITY: 4.1 The filler area representative‚ Sanitor‚ Line Mechanic‚ Line Lead‚ and Material Handler must follow this procedure. 4.2 Production Manager and Production Supervisor are responsible for training and auditing the team for compliance
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Tittle: Separation of leaves pigment. Introduction The photosynthetic pigment is used to absorb light during the process of photosynthesis. There are five pigments usually found in spinach leaves: Carotene (yellow)‚ Phaeophytin (yellow-grey)‚ Xanthophyll (yellow-brown)‚ Chlorophyll a (blue-green)‚ Chlorophyll b(green). Photosynthetic pigment is located in the chloroplast of the leaf. The function of chlorophyll a and chlorophyll b is to trap red and blue violet light when they carry out photosynthesis
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this lab is to show how potential energy and kinetic energy is shown and transferred using a model rollercoaster. This lab also demonstrates the Law of Conservation of Energy. II.Introduction Potential and Kinetic energy have a very big relationship. The Law of Conservation of Energy states that “Energy cannot be destroyed or created‚ but can be transformed or transferred.” This lab will help demonstrate this law and show the conversion between Kinetic and Potential energy throughout the rollercoaster
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