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denaturation of enzymes and nucleic acids; alteration of membrane permeability.
The 2 Basic Mechanisms of physical and chemical control are the _____ & _____.
Examples of which physical control method: culture media, disposal of used plates, instruments, glassware
Examples of which physical control method: flaming the loop, disposables, contaminated bodies and carcasses
Hot air oven
Examples of which physical control method: glassware, pipettes, canisters of ointment or powder
Physical control method used to reduce numbers in liquids that are heat sensitive (sera, vaccines, vitamin solutions, toxins, beers)
X ray or gamma ray breaks sugar phosphate backbone of DNA by generation of highly reactive hydroxyl radicals
First agent of control; toxic to humans; used in industrial applications; decontamination of sputum and fecal samples; chloraseptic mouthwash
Chemically related to phenol but less toxic; Cresol--methyl phenol--add to detergent and get lysol good environment disinfectant; Creosote--wood preservative
Antisceptics; Hexachloaphene--very effective against Staph infections in the past widely used but now rx; Hexyresorcinol-in mouthwash and throat losenges--will loosen mo's from mucus membrane surfaces; Triclosan--antibacterial soaps
Chlorine--oxidizing agent, effective against bacterial endospores, gas bubbles in pool water; Iodine--antiseptic
Methanol, ethanol, propanol; 70% more effective than pure; used for topical antiseptic for cuts etc.; food preservative
Denaturate Enzymes; Copper--algicide; Mercury-- as topical antiseptic; Silver--as silver nitrate
Quaternary ammonium compounds
Super detergents; Economical; broad spectrum; non toxic; antiseptic as well as disinfectant; used in commercial antibacterial soaps
Sulfur dioxide--used in wine making; Organic acids (Sorbic acid, Calcium proprionate, sodium nitrate and nitrite)
True chemical sterilant; gas highly explosice; used in pressurized chamber--cold autoclave; used on plastics, spices
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