Posted on April 19, 2009 by firebiology07 BAB I PENDAHULUAN I.1 Latar Belakang Di dalam bidang ilmu mikrobiologi, untuk dapat menelaah bakteri khususnya dalam skala laboratorium, maka terlebih dahulu kita harus dapat menumbuhkan mereka dalam suatu biakan yang mana di dalamnya hanya terdapat baktri yang kita butuhkan tersebut tanpa adanya kontaminasi dari mikroba lain. Biakan yang semacam ini biasanya dikenal dengan istilah biakan murni. Untuk melakukan hal ini, haruslah di mengerti jenis- jenis
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to observe the relative trends of bacteria growth over time in broth. This experiment was conducted over the period of two days by observing the growth of bacteria in an agar broth. This solution was created by taken a single bacteria colony from a petri with an inoculation loop and placing into a bottle filled with an agar broth. After this, the bottle was placed in a incubator and left there for 24 hours. On day one, the bottle's Absorbance was measured using a spectrophotometer and it was discovered
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Introduction The Daphnia magna, more commonly known as the water flea, is a tiny freshwater crustacean. Its clear exoskeleton and jointed appendages point to its classification as an arthropod. This is further evidenced by the location of its heart—the dorsal region. The Daphnia magna’s importance in the aquatic food chain can be attributed to its essential place in the diet of young and adult fish (Elbert, 2005). The Daphnia magna belongs to Class Branchiopoda, which are free-floating crustaceans
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college gathered information then used creativity to invent the smartphone. Today, I want to tell you about Howard Florey and Julius Petri. These two men went to college and then used the information they learned to come up with ideas. These ideas would soon turn into inventions that would later change the world. So allow me to introduce the first famous scientist Julius Petri.
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glucose is essential for life, the theory was that if glucose was used on the radish seeds, the germination process would be accelerated. Our hypothesis was that if we used glucose, our germination should be quicker. Materials and Methods Eight Petri dishes were used in this experiment that held twenty radishes in each. These radishes were watered daily with glucose over the course of seven days. Three different concentrations of glucose were used with one solution being deionized water, which
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expected arrangements and map distances. Materials and Methods: During the first week, we acquired the mutant-tan type and the other wild-black types of the fungus, Sordaria fimicola from a Petri dish. In order to obtain it, we needed to make sure that all out utensils were sterile. We took sterile blank Petri dish and labeled it. We sectioned
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applications (Petri, 2009). Presentation Layer The Presentation Layer is number six of the OSI model, and it responds to the service requests of the application layer and sends requests to the session layer. Specific functions of the presentation layer are as follows: • Translates data from applications into local machine formats the computer can understand and vice-versa for the end-user. • Communicates with the applications layer. • Communicates with the session layer (Petri, 2009)
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Comparison between MPN and E coli Petri film: The use of E.coli petrifilm seems more reliable than MPN since the value of MPN is less than E.coli petrifilm in the same group. It showed that MPN method was underestimated the total coliform and E.coli numbers. The Most Probable Number test methods described in this Practical provide guidelines for detection and enumeration of bacteria of food and water origin. Then we can prevent food borne infections and diseases occurring more commonly. Disadvantages
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Running head: Two Rivers Wastewater Treatment Project Wastewater Treatment Project Zoe French Biology 111 Abstract Municipal wastewater treatment plants were suspected to be reservoirs for antibiotic resistant bacteria so a study was conducted. In the study, two samples were collected from a local Wastewater Treatment Plant. The samples were taken at different stages of treatment so one of the samples in the study is untreated, and should contain a greater amount of antibiotic resistant
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glass. Use the scalpel to make your cut for experimental planaria #1. Measure and record the length of the anterior and the posterior pieces. Gently place the separated or cut planaria back in the Petri dish that is labeled according to them. Make sure there is water in the Petri dish. Cover the petri dish and place it in a shady area at room temperature. Clean up your lab area and return all materials. Bumrungkul 12.Measure and record the growth of the Planaria every two - three
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