The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
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Chapter One INTRODUCTION Herbal medicines tend to look primitive and unscientific when compared to synthetic (conventional) drugs‚ which are thought to be more reliable than those made from plants. Herbal medicine is still the mainstay of about 75-80% of the world population‚ mainly in the developing countries for primary health care (Kamboj‚ 2000). This is primarily because of the general belief that herbal drugs are without any side effects‚ besides being cheap and locally available. The
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of. The materials we used to make this test possible consists of a sterile nutrient agar Petri dish‚ the bacteria Serratia marcescens‚ Erythromycin antibiotic disk‚ Ampicillin antibiotic disk‚ Penicillin antibiotic disk‚ sterile disk of blank filter paper‚ marking pen‚ long handled cotton swab‚ forceps‚ metric ruler‚ and a 37°C incubator. For our procedure we first filled our sterile Petri dish with agar‚ just so that the bottom of it was covered‚ then waited a day for it to condense. Then
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growth of staph infection. Coincidentally‚ blue light therapy is extremely similar to UV light‚ so that inspired this project. The materials used were glass petri dishes‚ an autoclave‚ Staphylococcus epidermidis‚ tanning lights‚ black light‚ sunlight‚ agar‚ and an incubator. To
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The relationship between shape and diffusion rate Aim- To investigate the relationship between the shape of an object and the time taken for a substance to diffuse to its centre. Hypotheses- Part A) The 5x5x2.5mm block will turn clear first as the Surface area to volume ratio is high and the 10x10x10mm block will take the longest to completely diffuse the Acid to its centre. Part B) The flat‚ rectangular block will be the first to completely turn clear due to its high Surface Area/Volume Ratio
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at the hospital’s laboratory to find out the resistance of a microorganism. This experiment was meant to use the naked eye and a magnifying glass when necessary. Procedures: This experiment called for prepared agar in a petri dish‚ smeared s. epidermis on the surface of the prepared agar‚ and a 3 separate quadrants labeled gentamicin‚ novobiacin‚ and penicillin. Once those steps were completed a tablet of the 3 antibiotics were placed in the center of the 3 quadrants with the petri dish lid closed
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plasmids by using molecular techniques. Agar plates labeled LB‚ LB/AMP‚ and LB/AMP/ARA containing ampicillin (AMP) and arabinose (ARA) were used to grow of the bacteria of interest and SDS-PAGE gels were utilized in identifying the fluorescent and non-fluorescent proteins. The end results illustrated that there were no signs of fluorescent proteins in the gel bands and there were red fluorescing bacteria in the LB/AMP plate that should not have been. The agars contained in all three plates was exposed
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CORE PRACTICAL ONE Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically‚ and discuss whether there are ethical issues in the use of invertebrates. Daphnia‚ the water flea‚ is a small freshwater crustacean which lacks physiological methods of maintaining a constant body temperature. This means that if the environmental temperature changes‚ its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature
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ANTIMICROBIAL ACTIVITY OF SOIL BY SITUMBEKO LIWELEYA (s213459531) Research Proposal Submitted in fulfillment of the requirements for the degree of Bachelor of BIOMEDICAL TECHNOLOGY | | FACULTY OF HEALTH SCIENCES | at Nelson Mandela Metropolitan University | MODULE- RESEARCH METHODOLOGY‚ SUPERVISOR- PROFESSOR N. SMITH | Contents ANTIMICROBIAL PROPERTIES OF SOIL 2 ABSTRACT 2 LITERATURE REVIEW 3 AIM OF RESEARCH 4 OBJECTIVES OF STUDY 4 RESEARCH METHODOLOGY 4
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and the survival of the bacteria. Control: Nutrient agar plate with streaks of Serratia Marcescens without exposure to UV light. Results: Figure 1: Represents the nutrient agar plate used as the control that was not exposed to the UV light. Each quadrant represents a 10 sec exposure to the bacteria increasing to 40 secs. Serratia Marcescens bacteria streaked Figure 2: Represents the nutrient agar plate used as the second control with the bacteria that
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