Term
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Definition
| good microbes that are ingested in order to promote the development of normal flora |
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Term
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Definition
| help preserve food by making it too acidic for other types of potentially harmful microbes to grow |
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Term
| foods made by lactic acid fermentation |
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Definition
| pickles, sauerkraut, sausage, yogurt, and cheese |
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Term
| why yeast for alcoholic fermentation? why not bacteria? |
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Definition
yeast is naturally found in most fruit
bacteria makes nasty by-products like butanol |
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Term
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Definition
| when bacteria grow within the food and produce toxins that are then ingested. they do not colonize the human |
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Term
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Definition
| when bacteria are ingested with food or water, the bacteria colonize the body and produce damaging toxins |
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Term
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Definition
usually not harmful
microbes causes the food to be undesirable in some way |
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Term
types of food spoilage:
pseudomonas
erwinia
acetobacter
alcaligenes
penicillium & rhizopus |
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Definition
meat and veggies to feel slimey
bitter brown spots on fruits and veggies
makes wine taste like vinegar
makes milk turn ropy or chunky
green fuzzies on breads and other foods |
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Term
food preservation methods:
canning
pasteurization
drying and lyophilization
irradiation
aseptic packaging |
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Definition
food is heated to 115°C
food heated for short times
drying, lyo-freeze drying
radiation
sterile containers |
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Term
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Definition
| spot removers, vitamins, supplements, bt crops |
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Term
| steps of waste water treatment |
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Definition
primary treatment: large particles settle out
Secondary: good microbes convert dissolved organic chemicals to carbon dioxide and water
chemical treatment: disinfected usually with chlorine
sludge: sludge is digested by anaerobic microbes and then is dried and used for fertilizer |
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Term
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Definition
| biological oxygen demand, low is better |
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Term
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Definition
| biological oxygen demand, low is better |
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Term
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Definition
sedimentation: large particles settle out
Flocculation: flocculants are added and the flocs settle out
Fltration: filtered through sand, gravel, membrane filters
disifection: ozone, UV or chlorine used |
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Term
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Definition
| the use of microbes and other organisms to degrade pollutants in the environment |
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