Apparatus: • Agar Powder • Distilled Water • McCartney Bottles • Brassica Seeds • Scissors Diagram of Apparatus: Method: • Place some Rapid cycling Brassica seeds onto a damp sponge placed in a plastic tray. Cover with cling film and place in a warm‚ light place to germinate. • When the seeds have germinated‚ they are ready to culture. • Measure out 2.5 g of agar powder and add to 250 cm3 of distilled water. Heat and stir gently until the agar dissolves
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cotton swabs are first made damp using sterilized water. The swabs are rubbed in the following 5 places and then rolled and rubbed in the petri dishes: A: Rub the swab on the pass-code for the main entrance of the school and then roll it over the agar in petri dish A. B: Rub the swab on the door handle in room 3.1 and then
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the centre of the cells further away from the surface. Therefore‚ when dipped in sodium hydroxide‚ the larger cells will not be dyed pink all the way through like the smaller cells after the ten minutes. Materials: 1x1x1 cm agar cube 2x2x2 cm agar cube 3x3x3 cm agar cube 100 ml of sodium hydroxide Goggles Petri dish Scissors Timing device Tweezers Beaker Graduated cylinder Procedure: Refer to ’Nelson Science Perspectives 10’ pages 38-39‚ section 2.4; ’What Limits Cell Size?’.
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(Salivary amylase) against temperature” aims to know and observe the enzyme activity of the human saliva. The research only included the use of starch-agar as the medium to observe enzyme activity during the experiment. Five starch-agar plates were prepared and each were labeled 1‚ 2‚ 3‚ 4 and 5 respectively. One mL of saliva were placed in each starch-agar plate which was holed then incubated for 24 hours. The plate labeled 1 was stored with 0ºC. The plate numbered 2 was stored at 15ºC‚ plate 3 at
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POLYMER SYNTHESIS AND PROPERTIES AIM: The aim of the experiment was to prepare three different polymers‚ namely nylon 66‚ Agar Gel and slime‚ being able to differentiate between the configuration and analysis among the three structures‚ noting the physical characteristics of each polymer and the chemical reactions that occur during the formation of the polymer. Pre- lab questions 1. Is Nylon 66 a step or chain – growth polymer? Define both types of polymerization in your answer. Nylon 66
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aeruginosa was gram-positive and therefore it would be susceptible. That was my hypothesis.We divided antiseptic agar plate into quadrants and divided antibiotics agar plate into six areas. We wrote the organisms’ name‚ date‚ and the temperature on the bottom of the agar plates. For antiseptic‚ our group used one color code for each quadrant. We streaked the swab in three directions on the agar plate and used sterilize forceps to remove filter paper discs from the container‚ and dipped it into solution
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reactions or metabolic pathways‚ each was used in a way to help recognize those specifics and identify the unknown cultures. The differential tests used to identify the unknown cultures were oxidase‚ catalase‚ lactose and sucrose fermentation‚ Kugler/iron agar‚ nitrate reduction‚ gelatin hydrolysis‚ starch hydrolysis‚ manitol salt‚ MR-VP‚ citrate‚ bile esculin‚ indole‚ urease‚ DNase‚ and coagulase. Material & Methods The tests performed on the unknown bacteria cultures were all used to determine
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(Pearson’s 2011). Mannitol Salt Agar The Mannitol Salt Agar test was used to test only the Unknown Gram-positive bacteria. One colony from the Unknown 13A plate was used to inoculate the Mannitol Salt Agar Plate. After the plate was inoculated‚ it was placed in an incubator at 35ºC for 48 hours. If the agar surrounding the culture changed from red to yellow the test was positive‚ which indicated that the bacterium was capable of fermenting mannitol (Pearson’s 2011). If the agar surrounding the culture did
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ABSTRACT Nature has been a source of medicinal agents for thousands of years and an impressive number of modern drugs have been isolated from natural sources Plants used for traditional medicine contain a wide range of substances that can be used to treat chronic as well as infectious diseases. Clinical microbiologists have great interest in screening of plants for antimicrobial activities and phytochemicals as potential new therapeutics. The use of plant extract for medical treatments is enjoying
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pigmentation‚ colony‚ margin characteristics‚ elevation properties‚ broth characteristics and agar stroke properties. 2. To examine bacteria growth characteristics on different culture media. Introduction: Bacterial species can sometimes be identified on the basis of how they appear on or in the different media. The pigmentation‚ size and shape of bacterial colonies as they grow on and in agar plates can provide identifying signs. Observing the growth characteristics of organisms in broth
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