ABSTRACT The effect of molecular weight on the rate of diffusion was measured using two tests namely: the glass tube test and the agar-water test. The set-up of the glass tube test used two cotton balls of the same size. One cotton ball is moistened with hydrochloric acid (HCl) and the other one is moistened with ammonium hydroxide (NH4OH). The two cotton balls were inserted in both ends of the glass tube. NH4OH which has a lighter molecular weight (35.0459 g/mole) diffused with a faster rate (dave=20
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pressure in the maggots’ chamber decreases‚ causing air to be drawn into the chamber‚ and therefore displacing the fluid. This double chambered respirometer‚ allows you to measure the pressure changes‚ due to the presence of a control tube. The rate of oxygen intake is measured by recording the distance the dye moves up the scale. We then calculate the mean and multiply by ?r². Hazard Precaution Remedial Action Soda-lime is a highly corrosive poison Wear gloves Don’t put hands near mouth First
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flask using a volumetric pipette. The volumetric flask was then filled to the mark with distilled water. The flask was covered with Parafilm and inverted to mix. The next part of the experiment was to determine the Vitamin C in a solution of known concentration. Observations of the Vitamin C sample and the amount found on the label was recorded. A tared piece of weighing paper was used to weigh 0.27 g of Vitamin C. The Vitamin C was then transferred to a clean 50 mL volumetric flask. The flask was filled
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The Spectrophotometer Determination Of Protein Concentrations And The Effects Sodium Dodecyl Sulphate And Triton X-100 Have On Protein Concentration. INTRODUCTION Spectroscopy is used as a collective term for all the analytical techniques based on the interaction of light and matter. Spectrophotometry is one of the branches of spectroscopy where we measure the absorption of light by molecules that are in a gas or vapour state or dissolved molecules/ions (Tombs‚ et.al‚ 1959). Spectroscopy is the
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Kubaská‚ M.‚ Sedláˇcek‚ S.‚ Bodík‚ I.‚ Kissová‚ B.: Food waste as biodegradable substrates for biogas production‚ Editor: Markoš‚ J.‚ In Proceedings of the 37th International Conference of Slovak Society of Chemical Engineering‚ Tatranské Matliare‚ Slovakia‚ 1413–1418‚ 2010. 37th International Conference of SSCHE May 24–28‚ 2010‚ Tatransk´e Matliare‚ Slovakia Po-Th-6‚ 118p.pdf Food Waste as Biodegradable Substrates for Biogas Production M.KUBASKÁ*‚ S.SEDLÁČEK‚ I.BODÍK‚ B.KISSOVÁ Institute of Chemical
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the growth rate of crystals The information gained from this experiment can help society by showing different temperatures can affect the growth rate of different types of matter; also it may help computer chip manufacturers‚ as there are crystals in computer chips. Temperature affects the way crystals grow through
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Affect of enzyme concentration to the rate of reaction Aim: With the experiment of protein solution‚ in this case egg white added to different pepsin concentrations (0%‚ 0.2%‚ 0.4%‚ 0.6%‚ 0.8%‚ 1.0%) shows‚ as the egg white is a protein and the pepsin works as an enzyme‚ how a higher pepsin concentration and therefore a larger amount of enzymes effect the rate of reaction. Hypothesis: An increased concentration of pepsin speeds up the time the mixture needs to come clear. Introduction:
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Chirag Patel Biology 157 Determining the Effect of Varying Substrate Concentration Question: How does concentration of potatoes affect the amount of oxygen produced with hydrogen peroxide and potatoes (enzymes)? Introduction The enzyme used for this experiment is Catalase. Catalase is inside mostly any living organism which uses oxygen. Its job is to break down hydrogen peroxide‚ into oxygen and water. (Formula) 2H2O2 ---> 2H2O + O2 (lab manual). There are limiting factors which if altered
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Acetylcholinesterase and Butyrylcholinesterase substrate selectivity and various acting cholinesterase inhibitors Introduction Cholinesterases are a group of enzymes present in mammals which breakdown certain neurotransmitters by hydrolyzing the ester bonds within a molecule (Rang & Dale‚ 2007). There are two major types of enzymes‚ acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Though similar in structure‚ they differ in distribution‚ function and substrate specificity. AChE is found in red
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"Do different concentrations of solutions determine the mass of a potato?" Introduction: The way to get the full results of this lab was through the process of osmosis. Osmosis is the movement of water across a membrane into a more concentrated solution to reach an equilibrium. When regarding cells osmosis has three different terms that are used to describe their concentration. The first of these words is isotonic. Cells in an isotonic solution show that the water has no net movement and the amount
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