‘Study of the Effect of Lead (heavy metal) on the Growth of Brasicca juncea’ Neha Haresh Ruchandani and D.Meena.S.Rao* Dept. Of Botany‚ R. K. T. College‚ Ulhasnagar *Dept. Of Botany‚ R. K. T. College‚ Ulhasnagar A major environmental concern due to dispersal of industrial and urban wastes generated by human activities is the contamination of soil. Controlled and uncontrolled disposal of waste‚ accidental and process spillage‚ mining and smelting of metalliferous ores‚ sewage sludge application
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4.1 Aim The aim of this lab session is to demonstrate the effect of different conditions on membrane permeability. 4.2 Learning Objectives In this Lab Session‚ students will acquire the skills to: - analyze the effect of different temperatures on membrane integrity. - analyze the effect of the organic solvent acetone on membrane integrity. 4.3 Introduction Even though membranes separate cells from their surrounding environment and different organelles within the cells from the
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Well # 1 2 3 4 5 6 7 8 9 10 Drops of Blue Dye Solution 1 2 3 4 5 6 7 8 9 10 Drops of Distilled Water 9 8 7 6 5 4 3 2 1 0 Calculated Concentration Exercise 3 Observations (Only if colorimeter is used in this experiment.) Data Table 2: Dilution Test tube Number Solutions Concentration (M) Concentration (ppm) 3 Starting dilution (100 mL water and drops of
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The Spectrophotometric Determination of an Equilibrium Constant. Abstract: The report presents determination of equilibrium constant for the formation of a complex ion FeSCN2+. This was accomplished using a colorimeter to measure absorbance of some known concentration solutions in order to generate the calibration curve. The equation of the graph was used to compute the equilibrium concentrations of the reactants and products‚ needed to calculate the equilibrium constant for
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Aims The aims of this investigation are: 1. To find the rate equation of the reaction of hydrogen peroxide and iodide ions. This will be achieved by using an iodine clock method and colorimetric analysis. 2. Draw a graph of rate against concentration for each reactant (Hydrogen peroxide‚ potassium iodide and H+ ions). 3. Finding the order for each reactant 4. Finding the rate-determining step. 5. Proposing a mechanism for the reaction. 6. Using Arrhenius’ equation to find the activation
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Why it is important for all laboratory procedures and practices to be followed and communicated through the team. It is very important that the laboratory procedures and practices are communicated throughout the lab for the most important reason being safety. This prevents any danger and minimises risks as much as possible. For example the chemical store management minimises risks by following the correct procedures and storing the chemicals in the correct and safe places. This minimises the risks
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Sulphonation – The Process Most electrophilic substitution reactions are irreversible but sulfonation is an exception. Treatment of benzene with "oleum" (a solution of SO3 in concentrated sulfuric acid) will give the sulfonic acid‚ the electrophilic species being sulfur trioxide which is Lewis acidic. Fig – 1 Sulphonation : Benzene equation The sulfonic acid can be converted back by treatment with hot aqueous acid. The reason for this reversibility is the fact that the Wheland intermediate is overall
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AN INVESTIGATION TO FIND THE EFFECT OF BILE SALTS OF ON THE DIGESTION OF LIPIDS I have investigated that if there is an effect of bile salts on the digestion of lipids in the milk. When lipids are broken down in to fatty acids and glycerol (see below)‚ the acid lowers the pH of the mixture. To help me determine and measure the digestion of lipids‚ a pH indicator phenolphthalein has been used to measure the pH of the mixtures. The pH indicator will change the colour from pink to either white (if
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[FeSCN2+]/([Fe3+]•[SCN-] For this experiment we were able to determine the equilibrium constant KC for this reaction. First we prepared five different mixtures with known initial concentrations of iron (III) and thiocyanate ion. By using the colorimeter we determined the absorbance of each mixture once it reached equilibrium. Looking at the equation above we see that the mole to mole ration between SCN- and FeSCN2+ is 1:1 so we can simply set up a ratio using the absorbancy to find the consentration
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amyloliquifaciens and Aspergillus niger General Lab Requirements: • Autoclave or pressure cooker • Hot Plate or Microwave oven • Nutrient Agar powder • Potato Dextrose Agar powder • Soluble starch • Weighing scales • Shaker • Spectrophotometer or colorimeter • Water bath (Temperature controlled) Materials per group of 4 students • Hand trowel or disposable spoons • Sterile pipettes (One each of 10 mL‚ 5 mL and 1 mL) • Pipette pumps • Six bottles of sterile water‚ containing 90 mL each • Sterile
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