faster and longer the particle is centrifuged‚ the smaller the particles are that will be separated. Separation occurs by causing the larger particles to separate to the bottom as a particle or pellet‚ and the smaller will remain suspended in the liquid‚ or supernatant. Due to smaller particles separating out first‚ centrifugation is often done in small steps so that the supernatant takes off all larger unwanted cells first. The basic process of centrifugation: 1) The tissue must be homogenized
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thermometer and placed in a Thiele tube filled with oil. The tube was heated by a Bunsen burner at approximately 1 °C per minute. Melting point temperatures were recorded at the first indication of fluid and then when the sample had turned completely liquid. Two trials were completed on each sample ². The melting point of 10% naphthalene / 90% Biphenyl mixture was determined by electronic instrumentation. Two samples were prepared and placed in closed end capillary tubes and then inserted into
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all the way throughout the body (thickness) of the tile. Because of this scratches are less noticeable in this type of tiles. They are formed with the paint mixture pre-added while making the body. * Nano polished Vitrified Tiles : a layer of liquid silica on vitrified tiles then which fills the micro (nano) pores on the tiles surface and makes it smoother in feel. * Glazed Vitrified Tiles(GVT) : vitrified tiles with glazed surface; it is called Glazed Vitrified Tiles (GVT). Main advantage
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Osmosis Aim: To determine the concentration of cell sap in a potato cell. Osmosis is the movement of water through a semi-permeable membrane. It starts from a weak solution and becomes a more stronger solution until the concentrations on both sides are equal. To investigate the range of solutions needed to find the point at which the surrounding solution is the same as the cell sap in the vacuole.
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parlor. They compete with one another as to effectiveness to the scalp and hair. Though the service is known as hot oil treatment‚ the material used id not oil but emulsion or cream. Tools and Materials for Hot Oil Treatment 1) Oil - is a greasy liquid used as lubricant. 2) Cape - is used to protect the patron’s cloth. 3) Comb - is used to seperate the hair and remove tangle. 4) Hairbrush - is used to loosen dandruff and remove dirt. 5) Bowl Enamel - is used for heating the oil. 6)
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the temperature of the warm water before the ice was add it and after the ice was added it. To take the temperature of the water we need to use a thermometer and make sure it’s in Celsius. To determine the mass‚ first I need to find the mass of the liquid (water) using a graduated cylinder and then find the mass again after the ice is added and then melted using the same material (graduated cylinder). Data & Observation Results | Trial 1 | Trial 2 | Trial 3 | Initial Volume of water (V1) | 100
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1.2 158 310 Polystyrene 1.05 104 240 Polyvinyl chloride 1.4 62.5 160-172 Table 1 Properties for five known polymers (Callister 737-775) The melting temperature of a polymer is the point at which it transforms from the solid form to a viscous liquid in which there is little molecular order (Callister 500). This temperature depends on the stiffness of the molecular chain‚ molecular weight‚ and the degree or branching (Callister‚ 502). Chain stiffness is controlled by the ease of rotation about
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box. 3. Attach the stopcock to the tip of the titrator by placing the larger‚ clear‚ plastic end of the stopcock into the tip of the titrator and then twisting the stopcock into place. The stopcock should fit tightly into the titrator‚ so that the liquid will not leak. 4. Stack the textbooks on top of one another or stack two textbooks on top of the LabPaq box. 5. Clamp the test tube holder around the middle of the titrator and slide the long end under the top two books in the stack. Place a sheet
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Abstract-Timur Solid phase extraction is a sample preparation technique that overperform liquid /liquid extraction in its efficiency‚ labor intensity and waste disposal. The purpose of this lab is to learn how SPE can be used to identify trace amounts of Vanillin. Stock solution of vanillin in water with concentration of 50 ppm was prepared. Four solutions with concentration of 5 ppm‚ 1 ppm‚ 0.5 ppm and 0.1 ppm were made from stock solution. UV-Vis spectra of standard solution was recorded at 229
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Discussion The mucilage glue would work well with paper because the paper would soak up the glue and the wood would have to have a lot of glue and time. The glue stick isn’t that wet so it wouldn’t be soaked up by the wood. The white glue is a liquid so it’s sticky but takes time to dry. VII. Conclusion I was right when I said that mucilage glue is good on paper. I was right also when I said that‚ a glue stick is pretty good on paper. I said that the white glue just needed time to dry‚ so
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