Exploring Enzymes - Ground-Up Tissue Activity Abstract Our experiment looked at how increasing the surface area of a substance affects the amount of bubbles created due to the presence of the enzyme catalase. The experiment used two pieces of fish‚ one whole and one ground up‚ which were then covered in hydrogen peroxide. This method allowed us to observe the catalase in ground up fish break down the hydrogen peroxide at a quicker rate than in the piece of fish left intact. This was determined
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Aim To measure how different concentrations of mythelin blue affects the rate of diffusion through agar jelly. Hypothesis The diffusion of mythelin blue is directly proportional to its concentration‚ hence as the concentration increases; the rate of diffusion increases too. Controlled Variables Time time was kept constant while testing the diffusion spread of mythelin blue with each concentration. Temperature the experiment was undertaken in room temperature as change in temperature can
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Summary This purpose of this experiment was for students to do the colony count methods‚ estimating the viable cell number of commercial active dried yeasts (ADY). This experiment allowed the students to perform the plate count technique by serial dilution and two common methods‚ spread plate and pour plate to determine the colony forming unit (CFU) of yeasts A ten-fold dilution is used in this experiment‚ the sample is diluted until it reached the 10-9 dilution. Plating for spread plate started
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Abstract Introduction An antimicrobial is a substance that kills or inhibits the growth of microorganisms such as bacteria‚ fungi‚ or protozoans (Antimicrobial). Antimicrobial drugs either kill microbes or prevent the growth of microbes. Disinfectants are antimicrobial substances used on non-living objects or outside the body. Ginger Figure 1 : Ginger (Studies Reveal Ginger Lowers Colon Cancer Risk) Ginger is commonly used around the world and has been employed in the treatment‚ cure‚ and
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CORE BIOLOGY PRACTICALS You will need to know these practicals as the exam board may ask you questions based on them. Below is a summary of each one. Name of practical and independent & dependent variables Effect of caffeine on Daphnia heart rate Independent: caffeine concentration Dependent: heart rate of Daphnia Measuring the content of Vitamin C in fruit juice Independent: fruit juice Dependent: volume of juice required to decolourise 1cm3 of DCPIP The effect of temperature on cell membranes
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University of the Philippines Los Banos BIOLOGICAL CONTROL Jeff C. Ebio G-1L INTRODUCTION Farmers sure aim to have abundant and healthy agricultural produce but that became so elusive as the prevalence of disease-causing fungi or bacteria and defective planting materials remain a challenge. To cease all these through a necessary and effective pest management and disease control schema must be utilized. Using chemical pesticide would be a usual resort though
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calculated by converting the radius from millimeters to micrometers and dividing the resulting number by the number of minutes the plates were sitting. * Diffusion in liquid -room temperature water -crystal of KmnO4 -ruler A glass Petri dish is filled with room temperature water and placed over a thin‚ metric ruler. A crystal of KMnO4 is placed directly over the ruler. The starting time is recorded at 6.40
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gradient between the substance in the “sausage” and the water is the greatest and molecules move faster when the temperature is hotter. Materials: Distilled water - cold (5 degrees) - hot (60 degrees) crushed ice 30mL diluted corn syrup 2x Petri dish 30mL undiluted corn syrup String thermometer 100mL graduated cylinder hot plate Potassium permanganate glass funnels 4x 15
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Bacteria Prac Aim: To observe the growth of bacteria on Agar plates Hypothesis: That the bacteria will grow in colonies throughout the agar plates except for the one with the anti-biotic loop because some will fight off the bacteria. Method: (Method taken from prac sheet) Plate 1: Use the swab to cover your entire agar plate in your bacteria. You only need one swab of bacteria but be careful to cover the entire surface of your agar in a layer of bacteria. Carefully place an Antibiotic Mastring
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Introduction- The purpose of this experiment is to obtain isolation of individual species of particles from the mixed culture. This is completed through the isolation technique of streak plate. The objective of this experiment is to replicate the technique of streak plate but on a much larger scale. Because it is on a larger scale the particles are able to be visually observed as they are isolated using the streaking technique as the experiment is conducted. The benefits of the streaking technique
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