July 15 to September 16‚ 2013. Results showed that seeds treated with 10 kr radiation obtained the highest average height of 128.90 cm with 100 % germination and survival. The seeds treated with 50 kr radiation obtained 0% survival rate and the lowest germination rate (70%). Thus‚ irradiation of 10 kr induces mutation to the corn which will give the highest survival rate and germination of the seed while doses of radiation higher than 10 kr will inhibit its growth and decrease germination. Generally
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visualisation of the pattern of distribution of radiation. In general‚ the radiation consists of X-rays‚ gamma (g ) or beta (b ) rays‚ and the recording medium is a photographic film. For classical X-rays‚ the specimen to be examined is placed between the source of radiation and the film‚ and the absorption and scattering of radiation by the specimen produces its image on the film. In contrast‚ in autoradiography the specimen itself is the source of the radiation‚ which originates from radioactive material
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When solid objects are heated‚ they emit radiation. At normal temperature‚ we are not aware of this radiation because the intensity is low. At higher temperatures‚ there is sufficient infrared radiation that we can feel the "heat" if we are close to them. At even higher temperature‚ the objects actually glow‚ like the heating element of toaster or red-hot electric stove burner. Since they are radiating energy‚ there must be a rate at which they are radiating. They may radiate 10 Joules per second
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Food Contamination and Poisoning You know when eating some kind of food‚ and it doesn’t taste right‚ look right or smell right? That means it could be contaminated with a dangerous substance that could harm the body. Food poisoning is the result of ingesting organisms or toxins in food. Food poisoning can affect one person‚ or it can occur as an outbreak among several people who all ate the same thing. Even though food poisoning is quite rare in North America‚ food poisoning affects 60 to 80 million
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Products and ingridients for pizzeria. Pizza dough (flour‚ yeast‚ sugar‚ salt‚ oil‚ („dry storage”) water) - Prepared pizza dough balls must be stored at 5 °‚ clean and dry plastic boxes‚ covered with plastic wrap and marked dates‚ „Best by” – aprox 48h‚ if the pizza dough is not used at the time it over-curdl’s and is no longer usable. Pizza tomato sauce – (tomatoes in their juice‚ tomato pasta‚ sugar‚ salt‚ vegeta‚ black peppers‚ oregano („dry storage”)‚ water‚ onion‚ garlic‚ carrot juice‚ carrot
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Radioisotopes: When radiation collides with molecules in living cells it can damage them. If the DNA in the nucleus of a cell is damaged‚ the cell may become cancerous. The cell then goes out of control‚ divides rapidly and causes serious health problems. Radiation warning symbol The greater the dose of radiation a cell gets‚ the greater the chance that the cell will become cancerous. However‚ very high doses of radiation can kill the cell completely. We use this property of radiation to kill cancer
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few types of weeds and insects but Rachel Carson poses the question “Can anyone believe it is possible to lay down such a barrage of poisons on the surface of the earth without making it unfit for all life?” (614). Carson also touches on man-made radiation releasing harsh chemicals into the air‚ such as Strontium 90‚ which comes down as rain and soaks into the earth or even “…in time takes up its abode in the bones of a human being‚ there to remain until his
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manufactured by the Atomic Energy of Canada Limited (AECL) and went down to history as one of the world’s worst software disasters. The machine was released to the market in 1983 and was later involved in at least 6 accidents that lead to enormous radiation overdoses for the patients. One of the major innovations of the Therac-25 was the move to complete computer control‚ which allowed operators to set up the machines more quickly‚ so they could focus more on the patients. Altogether‚ eleven Therac-25
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Adaptive Radiation An example of adaptive radiation occurring after a mass extinction is the extinction that killed off the dinosaurs. What caused this mass extinction was when a massive comet hit earth‚ off the Yucatan Peninsula. However‚ the mammals that survived this catastrophic event for the most part‚ survived because they could burrow in holes for shelter. Regardless‚ about 90% of all life on earth was destroyed. This led to an opportunity for the surviving plants and animals to disperse
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Introduction: Every year millions of people suffer from food poisoning due to uncontrolled application of agricultural chemicals‚ environmental contamination‚ use of illegal additives ‚ microbiological hazards and others but as a result of increasing awareness of consumers and their demands to provide them with safe‚ wholesome and high quality food have force many food premises to carry out a broad assessment and re-organize their systems of food control in turn to improve efficiency ‚ rationalization
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