Term
| after 7 days the dry weight of fungi on 'apples' is 5mg, you conclude... |
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Definition
| the compound is fungistatic |
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Term
| decimal reduction time is the |
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Definition
| time in minutes that 90% of pupulationat a given temp is gone |
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Term
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Definition
| removal of all microorganisms |
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Term
| difference between a disinfectant and an antiseptic |
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Definition
| disinfectans are used on envir suf and antiseptics are used on living tissue |
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Term
| what treatment achieves sterilization |
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Definition
|
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Term
| name 3 antiseptics... 1 not |
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Definition
| iodine, bisphenol, alcohol are-soap is not (all are used on skin) |
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Term
| why is soap not ann antiseptic |
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Definition
| because soap does not kill or inactivate microbe |
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Term
| what kills cells by damaging dna? |
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Definition
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Term
| what condition would interfere with the effectiveness of an antiseptic or disinfectant |
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Definition
|
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Term
| what is typically destroyed by antimicrobial agents (3 target agents) |
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Definition
| plasma membranes, proteins, nucleic acids |
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Term
| what are these not? lyophilization, deep-freezing filtration |
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Definition
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Term
| what substance is effective against bacterial endospores |
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Definition
|
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Term
| what is th most effect conc of ethyl slcolhol? |
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Definition
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Term
| what organism is the most difficult to kill |
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Definition
|
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Term
| is triclosan an oxidizing agt? |
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Definition
| No Oozone, hydr pero, chlorine) |
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Term
| what is the most useful disinfectant for med instruments |
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Definition
|
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Term
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Definition
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Term
| which organisms is generally easy to kill |
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Definition
|
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Term
| if the disinfectants are nontoxic and designed for the same purpose what is the most effect? |
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Definition
| z-1:1,000.. the disinfectant with the greast use-dilution value |
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Term
| disk-diffusion test 'which gives the best dilution... |
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Definition
|
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Term
| why does dairy creamer etc not have to be refridg? |
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Definition
| IT IS TREATED WITH.....UHT treatment, ultra high temp |
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Term
| antiseptic is used to remove microbes from |
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Definition
| the skin before an injection |
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Term
| what agent challenges sterilization |
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Definition
|
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Term
| what is the term for inhibiting growth |
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Definition
|
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Term
| what is not a major target for antimicrobials |
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Definition
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Term
| what treatment is most effective against the contaminated counter |
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Definition
|
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Term
| what are char of autoclave |
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Definition
| use of moist heat, high pressures, high temp, ability to sterilize solu w/endospores |
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Term
| pasteurization was first used by pasteur to control spoilage of |
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Definition
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Term
| what i sappropriat for a medium for growing fasidious bacteria? |
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Definition
| autoclave the medium pror to adding growth factors, cool, aseptically add the growth factors |
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Term
| what is least likely to NOT be damaged by gamma radiation |
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Definition
|
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Term
| name food preservation methods |
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Definition
| deep freezing, osmotic pressure, commercial canning, dessication |
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Term
| what is the easiest to kill with microbial agents? |
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Definition
|
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Term
| what radiation is least effective in killing microbes |
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Definition
|
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Term
| DRT for a part bact spe at 60C is 30 mins, how long would it take at this temp to ___ bacterial pop |
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Definition
|
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Term
| alcohol is most effective at what % |
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Definition
|
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Term
| examples of microbial control with heavy metal... (4) |
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Definition
| algae control in pools with copper sulfate, burn treat w/silver sulf, mouthwash w/zinc chloride, antiseptic sol containg mercurochrome (NOT benzol peroxide) |
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Term
| a compound found in antimicrobial soaps that targets g-pos bact.. |
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Definition
|
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Term
| list possibilities of additives in snack food |
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Definition
| (xanthan is not) pot sorbate, sodium benz, calc prop, sorbic acid |
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Term
| Most viruses are highly resistant to disinfectant and antiseptics, t or f |
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Definition
|
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Term
| presence of organic matter such as blood or saliva may impair the action of antimicrobial chem t or f |
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Definition
|
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Term
| all bacteria die at once when they are exposed to heat or chem treat t or f |
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Definition
|
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Term
| times reeq for sterilization in an autoclave are shorter than those req in a dry oven because moist specimens mor effec than does dry heat (t or f) |
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Definition
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Term
| ethylene oxide gas is used to sterilize medical equip that might be damaged by exp of others |
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Definition
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Term
| tor f, uv radiation and xray rad are similar in that they damage dna and have a high penetrating power |
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Definition
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Term
| iodine is one of the least eff antimicrobial chem, effec only agains certain very sensitive t or f |
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Definition
|
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Term
| ionizing radiation can be used to sterilize some foods such as spices, meat, and fruits and veget t or f |
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Definition
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Term
| oxidizing agents limit the growth of |
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Definition
|
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Term
| 4 types of bacteria may survive pasteurization they are.... |
|
Definition
| thermoduric, endospore, heat resistant |
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Term
| ___ ammonium cmpds are less effective against g-neg bacteria and more efficient with g-pos |
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Definition
|
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Term
| what term inhibits growth |
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Definition
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Term
| if an agent is fungistatic it is?? |
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Definition
| it would slow growth as the treatment |
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Term
| what household substance is effective against endospores |
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Definition
|
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Term
| This chemical is not an ooxidizing agent, it inhibits enzyme req for synthesis of lipids |
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Definition
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Term
| name a couple of oxidizing agents |
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Definition
| chlorine, hydrogen peroxide, ozone |
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Term
what is the order of death for these bacteria by chemical agents?
g positive and negative, endospores, mycobacteria |
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Definition
| g pos g neg, mycobacteria, endospores |
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