The Effect of Molecular Weight on the Rate of Diffusion of Potassium permanganate (KMNO4)‚ Potassium dichromate (K2Cr2O7) and Methylene blue ¹ ABSTRACT The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. One drop of potassium permanganate (KMNO4)‚ potassium dichromate (K2Cr2O7) and methylene blue were used. Each substance has a respective molecular weight of 158 g/mol‚ 294g/mol and 374 g/mol. The diameters (in millimeter) were measured
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Serial Dilution Activity Many applications require the determination of microbial numbers. Those applications can be either clinical or in a research setting. Clinical applications include determination of antibiotic efficacy and as well as therapy. Research applications include determination of the effectiveness of antimicrobial chemicals‚ radiation‚ etc. The viable count is most common or standard method used to quantitate bacteria. With this method only microbes that are alive and able to reproduce
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agar cools‚ pour an equal amount into each dish. 4. Press 25 cloves of garlic to make garlic juice. 5. Saturate one group of paper disks in the following: o Penicillin o Streptomycin o Tetracycline o Glutaraldehyde o 5 percent phenol alcohol o Fresh garlic extract 6. Put all petri dishes into incubator. The temperature in the incubator is 35@dgs C (95@dgs F). 7. After 24 hours‚ observe petri dishes‚ and use light box to take pictures of each dish. Repeat again after 24 hours. 8. Calculate
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A2 Practical Investigations Title: The effect of Temperature on the growth of Aspergillus oryzae Develop a Hypothesis This particular investigation is to discover how a range of temperatures effects the growth rate of the fungi Aspergillus oryzae. Most fungi’s tend to survive within the temperature range of 5-35oC‚ with the optimum depending on their normal environmental temperature. The fungi Aspergillus oryzae is heterotrophic which means they taken in their food from dead organic matter and cannot
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Problem: How do protease in some fruit juices help softening meat? Hypothesis: The protease in some fresh juices digests collagen‚ which gives meat a tough texture by holding meat fibres together. Design of investigation: In order to test the hypothesis‚ the presence of protease in those fresh juices was tested at first. Then the amount of them was needed to be compared for finding their difference in effectiveness in tenderizing meat. Control experiments were set up for proving protease was
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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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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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American Culture and Visual Entertainment Media Michele A. DiSanto April 25‚ 2013 HUM/176 Elizabeth Veucasovic University of Phoenix In our society as individuals Social Media‚ Television‚ and movies has changed in how we interact in our everyday lives. This new technology has a changed our American cultures many of the ways‚ today we do not follow the traditional and proper ethics we once lived by. It has also had a huge impact on the way we communicate with others; Facebook and Twitter
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about a choice of two main dishes. A sushi bar will be available for those who love the Japanese food‚ and steak will be one of the main dishes for those who like a good chunk of meat on their plate. The other choice of a main dish could be pasta or some type of cooked chicken dish. The hired waiters must work efficiently and give good service. A separate section in the party will be made for those who desire to dine. Therefore‚ despite being in the same space‚ the dance floor and dining section will
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Your Full Name: Lauren Sinay UMUC Biology 102/103 Lab 1: Introduction to Science INSTRUCTIONS: On your own and without assistance‚ complete this Lab 1 Answer Sheet electronically and submit it via the Assignments Folder by the date listed in the Course Schedule (under Syllabus). To conduct your laboratory exercises‚ use the Laboratory Manual located under Course Content. Read the introduction and the directions for each exercise/experiment carefully before completing the exercises/experiments
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