"Bacillus thuringiensis" Essays and Research Papers

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    Bacillus thuringiensis

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    Bacillus thuringiensis Bacillus thuringiensis Spores and bipyramidal crystals of Bacillus thuringiensis morrisoni strain T08025 Scientific classification Kingdom: Eubacteria Phylum: Firmicutes Class: Bacilli Order: Bacillales Family: Bacillaceae Genus: Bacillus Species: thuringiensis Binomial name Bacillus thuringiensis Berliner 1915 Contents Introduction Use in pest control Genetic engineering for pest control Usage Advantages Safety Limitations to Bt crops

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    Bacillus Cereus

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    Bacillus Cereus Bacillus cereus is a rod-shaped gram- positive bacillus that can be found in food‚ dust‚ dirt and sometimes soil. It is an aerobe and a facultative anaerobe that can form spores‚ which if activated at any point can begin to germinate and produce toxins. These spores that form from B. cereus are be resistant to heat and chemicals. B. cereus is found in approximately 25% of food sampled (3). Foods that are commonly associated with B. cereus are potatoes‚ rice‚ meat‚ vegetables

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    I had # 8 organism‚ Bacillus subtilis. Bacillus subtilis is a Gram-positive bacteria‚ rod-shaped and catalase positive. In order to figure out what is my unknown organism for this assignment‚ I had to perform series of tests. First was the glucose‚ lactose‚ and sucrose test. Through these three tests‚ I was able to detect the ability of the microorganism to ferment a specific carbohydrate. Fermentation reactions are observed by the color change in pH. In class‚ we used phenol red as the pH indicator

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    INTRODUCTION Bacillus anthracis has recently become popular as the causative agent of anthrax infections. Belonging to the bacillus species‚ the bacterium is considered‚ along with Bacillus cereus‚ to be of extreme medical importance. Until recently‚ the condition caused by the bacterium was rarely heard of. Although the bacterium is naturally found in the soil‚ its rare occurrences in humans have only been observed in those working with livestock or imported livestock products‚ therefore the

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    Bt Toxin Mini Report

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    Bacillus thuringiensis Bacillus thuringiensis is a universal‚ gram-positive‚ vegetative‚ spore-forming bacterium that is rod shaped and varies between 2–5 µm long and about 1.0 µm wide . Bt consists large rods with slightly curved ends and forms a parasporal crystal during the stationary phase of its growth cycle . Occurring in pairs or short chains‚ Bt is also motile with peritrichous flagella and non-caspulated . Bt belongs to the family of bacteria‚ Bacillus cerus (B. cerus)‚ which produces

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    Heat resistance of endospores of Bacillus pumilus Abstract Spore suspension of Bacillus pumilus was inoculated into universal bottles containing sterile distilled water in water baths at temperatures of 85°C‚ 90°C and 95°C. At specific time intervals‚ a sample was removed and spread on nutrient agar plates. The number of colonies formed was used to determine the D-value and z-value. The D-value for 85°C is 64.1 minutes‚ 25.7 minutes for 90°C and 8.2 minutes for 95°C while the z-value is 11

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    Genetically Modified Crops

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    ------------------------------------------------- Genetically modified crops Genetically modified crops (GM crops‚ or biotech crops) are plants‚ the DNA of which has been modified using genetic engineeringtechniques‚ to resist pests and agents causing harm to plants and to improve the growth of these plants to assist in farmers efficiency. Genetic engineering techniques are much more precise[1] than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create

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    genetically modifed crops

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    Genetically modified crops (GMCs‚ GM crops‚ or biotech crops) are plants‚ the DNA of which has been modified using genetic engineering techniques. In most cases the aim is to introduce a new trait to the plant which does not occur naturally in the species. Examples include resistance to certain pests‚ diseases‚ or environmental conditions‚ or resistance to chemical treatments (e.g. resistance to a herbicide)‚ or the production of a certain nutrient or pharmaceutical agent. Genetic engineering techniques

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    Ppt on Bt Brinjal

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    brinjal? Bt brinjal is genetically modified variety of brinjal which gives more resistant to Brinjal plant against insects. In technical terms Bt Brinjal is a transgenic brinjal created by inserting a gene [Cry 1Ac] from the soil bacterium Bacillus thuringiensis (and hence the name Bt) into Brinjal. The insertion of the gene into the Brinjal cell in young cotyledons has been done through an Agro bacterium-mediated vector‚ along with other genes like promoters‚ markers etc. This genetic insertion

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    isolate a gene responsible for conferring drought tolerance‚ introduce that gene into a plant‚ and make it drought tolerant. Crops can also be transformed using non-plant genes such as the use of Bt genes‚ in cotton and many other crops. Bt‚ or Bacillus thuringiensis‚ is a naturally occurring bacterium that produces crystal proteins that are lethal only to insect larvae. Bt crystal protein genes have been transferred into cotton‚ soya‚ corn‚ brinjal‚ enabling the plants to produce its own pesticides against

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    Bt-Corn

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    insecticide was discovered‚ particularly for corn. In this new case‚ the organism itself is genetically modified for protection. This insect-resistant corn is the new Bt-corn and contains genetic material from the donor organism‚ a bacterium. Bacillus thuringiensis contains a protein that kills the larvae of Ostrinia nubilalis‚ European corn borers‚ but is harmless to other insects (Bessin‚ 1999). When the Bt is consumed by the larvae‚ toxins paralyze the insectfs intestines‚ eventually causing death

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    Genetically Modified Crops

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    to allow farmers to use a mixed group of two‚ three‚ or four different chemicals.[71] Pathogen resistance – insects or viruses Tobacco‚ and many other crops‚ have been generated that express genes encoding for insecticidal proteins from Bacillus thuringiensis (Bt).[19][72] Papaya‚ potatoes‚ and squash have been engineered to resist viral pathogens‚ such

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    animals being utilized in animal by-products and thereby to reveal when these products contained ingredients originating from animals that had died of anthrax. The thermostable antigens involved are common to other Bacillus species so the test depends on the fact that the only Bacillus likely to have proliferated within and throughout an animal depositing extensive precipitating antigens in the tissues is B. anthracis. Procedure: 1. Chop or slice the specimen into fine pieces or strips. 2

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    CONTENTS 1. What is Genetic modification? ................................. 3 2. What are genetically modified crops? ...................... 3 3. Objective behind the research. ................................. 4 4. A brief description. .................................................... 5 * Article- 1........................................................... 5 * Article- 2........................................................... 5 * Article- 3............

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    Lab- Effects of Ecb

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    The Effects of ECB on Corn Crop Yield Abstract In this experiment we explore the infestation of ECB (European Corn Borer) on different types of corn and how it effects the corn crop yield. The corn is grown in a controlled environment with the only changing variables being the type of corn and the concentrations of the infestation of the ECB. Varying levels of infestation are tested on a corn crop throughout a 140 day growing season‚ at the end of the season the crops are then measured for

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    Pro Gmo Persuasive Essay

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    In recent history‚ many people have become wary of the infamous genetically modified organisms (GMOs)‚ which are commonly found in many foods and products‚ from corn to cotton. However‚ there are a series of documented dangers associated with GMOs and they have caused a divide between those who support GMOs and hope to reassure the consumer that GMO’s are safe‚ versus those who oppose GMOs and promote the removal of them from their favorite products. Despite strong arguments from both sides‚ there

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    GMO toxins and Pregnancy

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    of genetic engineering to the forefront of the public consciousness. Among the reports‚ several have shown the relationship between GMO cytotoxicity as well as the teratogenic potential in mammals. Specifically the toxins glyphosate‚ and Bacillus thuringiensis (Bt) present a combined area of concern as these herbicide resins and insecticidal toxins are present in Roundup-tolerant GM plants such as corn‚ soybeans‚ canola‚ cotton‚ sugar beets‚ and alfalfa. Although some scientists believe that GM

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    -1 Name: Lab 1: Dependent and Independent Variables Lab Results Table 1: Average Yield for each seed variety at no‚ low‚ and high infestation levels (8 points) Seed Variety Level of ECB Infestation Pot 1 Yield Pot 2 Yield Pot 3 Yield Average Yield BT 123 None 160.1 164.8 164.2 163.03 Low 164.0 162.6 168.3 164.97 High 155.1 163.0 163.9 167.67 BT 456 None 190 183.2 184.8 186 Low 178.8 172.6 179.6 177 High 157.3 157.0 159.0 157

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    Bt Corn

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    pests‚ has been commercialized now for several years in the US and also in several other countries such as Canada‚ Germany‚ Spain‚ Argentina‚ Honduras‚ South Africa and the Philippines. (Wu‚ 2006) The prefix ‘Bt’ from Bt-Corn originates from Bacillus thuringiensis (Bt)‚ a species of soil bacterium that produces the insecticidal crystal protein or delta endotoxins‚ toxins that kill crop pests.

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    Microbiology Coursework: Bacillus cereus After investigation following on outbreak of food poisoning at a pizza restaurant‚ it was found that all suffers had consumed a portion of side salad from the self-service salad bar alongside their main dish. Subsequently‚ this was further traced to a rice salad. Environmental Health Officers investigating this outbreak suspected it may have been caused by Bacillus cereus (B. cereus). The presence of large numbers of B. cereus in a food is indicative

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