Kristal Martinez SCI163 September 26, 2012 Sally Fierro Salmonella Salmonella is the name for over 2,500 types of bacteria found in unwashed fruits and vegetables, uncooked or undercooked meats and eggs and contaminated water. Salmonella bacteria are capsule shaped that are known to cause diseases in humans, animals, and birds, especially poultry. Many of these bacteria can cause illness in humans, and they can pass from the feces of people or animals to through the foods processing or harvesting
Words: 564 - Pages: 3
very contagious if spread to others or objects are handled by a person who has the hepatitis A virus. The ways to be contaminated by this virus is by someone not washing hands after using the restroom. Or by changing diapers. It is caused by feces bacteria. Also Hepatitis A can be in contaminated water by seafood that we eat. We can also get it from using contaminated needles from either drug use or from hospitals. Very unlikely it would be from hospitals, as in they always use new needles that
Words: 256 - Pages: 2
Mounirou Zorome 11/20/12 Microbiology Prof: Katherine Neuhoff Endospores. 1- Why are spores more difficult to stain than vegetative cells? The spores possess a though outer covering made of protein keratin which is resistant to staining. 2- Explain the terms sporulation and germination. Sporulation is the process of endospore formation within a vegetative cell; germination is the process of an endospore returning to its vegetative state. 3- List
Words: 702 - Pages: 3
hands before handling food, can transfer the poison. While cooking, it can be transferred by using the same cutting board or cooking utensils for raw and cooked meats. Not washing your hands while handling different types of food can transfer the bacteria as well. Contamination can come from animal or human feces during processing or harvesting. The soil in which some crops grow can be contaminated as well. Milk that hasn’t been pasteurized can contain salmonella. There are news reports all the
Words: 553 - Pages: 3
wastewater so that excessive oxygen consumption won't become a problem when it is released to the environment. (Maier et al, 2009) Another goal of biological treatment is nitrification/denitrification. Nitrification is an aerobic process in which bacteria e.g Nitrosomonas sp, Nitrobacter sp oxidize reduced forms of nitrogen. Denitrification is an anaerobic process by which oxidized forms of nitrogen are reduced to gaseous forms, which can then escape into the atmosphere. This is important because
Words: 1173 - Pages: 5
NUCLEUS The nucleus is the double membrane surrounding the chromosomes and the nucleolus. Pores allow specific communication with the cytoplasm. The nucleolus is a site for synthesis of RNA making up the ribosome. The nucleus is the control centre of a cell. It contains the cell’s hereditary information {DNA} MITOCHONDRIA Mitochondria surrounded by a double membrane with a series of folds called cristae. Functions in energy production through metabolism. It contains its own DNA, and is believed
Words: 260 - Pages: 2
habitation and adaptation, as different types of bacteria adapt to different types of environments in different forms of life. However, bacteria are grouped according to their uniqueness, features, structure, functions, and contribution to human life. Prokaryotes are so beneficial to us because they act as defences to protect us from various diseases. The essay will examine the significant impact of prokaryotes to human life. The word bacteria may be frightening to most of us; in many cases it
Words: 2362 - Pages: 10
Beta galactosidase is a hydrolase enzyme and it is also known as beta gal. It causes the hydrolysis of the polysaccharides that is it uses the water to break down the sugar molecules in to simpler and smaller compounds such as simple sugars. It acts on different substrates to break it down as it is a catabolic enzyme. The important substrates are lactose, lactoslyceramides, gangliosides and many other glycoproteins but lactose is an important substrate and sometimes this enzyme has been recognized
Words: 576 - Pages: 3
toxic waste effluents. Even though policies and environmental efforts should continue to be directed towards applying pressure to industry to reduce toxic waste production, biotechnology presents opportunities to detoxify industrial effluents. Bacteria can be altered to produce certain enzymes that metabolize industrial waste components that are toxic to other life, and also new pathways can be designed for the biodegradation of various wastes. Since waste management itself is a well-established
Words: 1747 - Pages: 7
the food is fresh or not past the expiration date. Effects from eating food past their expiration date could lead to food poisoning or physical discomfort, such as an upset stomach. Any food that is older than its expiration date may have dangerous bacteria that can cause food poisoning or an upset stomach (Lance Armstrong Foundation, 2011). It is important to pay attention to the expiration date on all food items. Do not purchase food older than its expiration date. When a person purchases food close
Words: 824 - Pages: 4
