the pelargonium hortorum with sodium alginate‚ then one of the samples is post treated with citric acid. Each sample was independently examined towards antibacterial activity using two types of micro-organisms (Escherichia coli AATCC 2666 gram negative (ve) and Staphylococcus aureus AATCC 6538 gram positive (+ve)). The result was taken after 4 hours‚ 8 hours and after 24 hours. 2.4. Physico mechanical measurments: 2.4.1. Tensile strength and elongation: The tensile strength and elongation of treated
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Staph infections are caused by a staphylococcus bacterium‚ Staphylococcus aureus. S. aureus is a purple‚ cocci shaped cell with its morphological arrangements in grape-like clusters‚ it is determined by a bacteriological stain‚ known as the Gram stain. This determines it to be a gram positive bacterium. When grown on bacteriological media‚ S. aureus appears as a large white to golden colony. It is not very fastidious but it grows well‚ either aerobically or under anaerobic conditions and produces
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Lab #4: The Immune System Purpose: The purpose of this lab was to perform and understand the procedures of conducting an ELISA test to determine whether a particular antibody is present in a patient’s blood sample through a virtual simulation. Hypothesis: If I successfully complete this lab‚ I will then understand how to perform an ELISA test‚ the purpose an ELISA test‚ and also how to interpret the results of this test. Materials and Procedures: Materials: Howard Huges medical
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2. To determine the conditions under which types of flow occur. 3. To compute Reynolds Number (Re) on fluid flow conditions. EQUIPMENTS AND APPARATUS a) Dye reservoir. b) Stilling tank. c) Observation tube. d) Stopwatch e) Graduated cylinder THEORY Reynolds number is used to distinguish between laminar‚ transitional and turbulent flows. Re = Reynolds number V = Fluid velocity (m/s) d = Pipe diameter (0.012m) v = Kinematic viscosity (0.893 x 10-6m2/s) Laminar
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Lab Report Abstract: The purpose of this lab was to see how magnesium reacts with oxygen. This reaction must be forced with heat. As magnesium changes to magnesium oxide the mass increased. Procedure: 1. Set up the stand and bunsen burne. 2. Go to crucible heat oven to obtain a crucible. 3. Weigh the crucible and lids mass. 4. Break up the magnesium ribbon on the crucible and weigh the mass of the magnesium‚ crucible‚ and lid. 5. Place the crucible on the ring stand over the flame. Allow
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Lab Report Janice Chisholm SCI207: Dependence of Man on the Environment Instructor: Lee Ott April 28‚ 2013 1. What patterns do you observe on the information table 4? While observing the information in table 4‚ it appears that the number of fish changes from time to time and the oxygen increases and / or decreases when this occurs. 2. Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water?
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Tim Readmond AP Biology Lab Report I. Title a. Modeling Diffusion and Osmosis II. Introduction a. If one places a 1.0 M solution of glucose inside a bag and then places that bag into a beaker containing a 1.0 M solution of sucrose‚ the percent of mass lost in the bag is 10.5%. The solution in the bag is hypertonic while the solution in the beaker is hypertonic‚ which is why water moves from the bag to the beaker and the bag loses mass. b. The purpose of this experiment is to see whether
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10/24/2013 LAB TITLE: Single Replacement Reaction of Solid Copper with Silver Nitrate PURPOSE The purpose of this lab is to: • Observe a single replacement reaction‚ and • Calculate the mole ratio of silver (Ag) to copper (Cu) in the reaction MATERIALS • Copper wire (30 cm) • Large test tube • 250 ml beaker • Silver nitrate (AgNO3) powder • Dilute AgNO3 solution • Distilled water • Electronic balance • Glass stir rod • Watch glass PRE-LAB DISCUSSION A single
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Growth Dynamics of E. coli in Varying Concentrations of Nutrient Broths‚ pH‚ and in the Presence of an Antibiotic Dvora Szego‚ Elysia Preston Darcy Kmiotek‚ Brian Libby Department of Biology Rensselaer Polytechnic Institute Troy‚ NY 12180 Abstract The purpose in this experiment of growth dynamics of E. coli in varying media was to determine which media produces the maximum number of cells per unit time. First a control was established for E. coli in a 1.0x nutrient broth. This was used to compare
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[ print page ] 3.01 Cell Cycle Lab Report Safety Notes: Always handle microscopes and glass slides carefully. Wash your hands after handling the prepared specimens. Materials: Compound light microscope Glass microscope slide with prepared onion root tip specimen Purpose: understand and identify the stages of the cell cycle and mitosis. apply an analytical technique to estimate the relative length of each stage of the cell cycle. Hypothesis: What do you predict you will find
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