Pasteurizing at 72C for 15 seconds

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Bio205 Chapter 7 D

Bio205 Chapter 7 Definitions

Question	Answer
A substance capable of killing microorganisms	Biocide/Germicide
A treatment capable of inhibitingn bacterial growth	Bacteriostasis
The presence of a toxin or pathogenic organism in blood and tissue	Sepsis
The absence of contamination by unwanted organisms	Asepsis
The temperature required to kill all the bacteria in a liquid culture in 10 minutes	Thermal Death Point
The length of time required to kill all bacteria in a liquid culture at a given temperature	Thermal Death Time
The time (in minutes) required to kill 90% of a bacterial population at a given temperature; also called D value	Decimal Reduction Time
Equipment for steralization by steam under pressure, usually operated at 15psi and 121C	Autoclave
The process of mild heating to kill particular spoilage microorganisms or pathogens	Pasteurization
Heat resistant	Thermoduric
Pasteurizing at 72C for 15 seconds	High Temperature Short-Time pasteurization
A method of treating food with high temperatures 140-150C for very short times to make the food sterile so that it can be stored at room temperature	Ultra-High Temperature
Different methods that have the same effect on controlling microbial growth	Equivalent Treatments
The process of sterilizing an inoculating loop by holding it in an open flame	Flaming
Sterilization by the use of an oven at 170C for approx. 2 hours	Hot-Air Sterilization
A screenlike material that removes particles larger than 0.3um from air	High-Efficiency Particulate Air (HEPA) Filters
A screenlike material with pores small enough to retain microorganism; a 0.45um filter retains most bacteria	Membrane Filters
The removal of water	Desiccation
High-energy radiation with a wavelength less than 1nm; causes ionization. Xrays and gamma rays are examples	Ionizing Radiation
Short-wavelength radiation that does not cause ionization (UV)	Nonionizing Radiation
Electromagnetic radiation	Microwaves
A method of determining the effectiveness of a disinfectant using serial dilutions	Use-Dilution Test
An agar-diffusion test to determine microbial ssceptibility to chemotherapeutic agets; also called Kirby-Bauer	Disk-Diffusion Method
	Phenol
	Phenolics
	Bisphenols
	Halogens
	Iodophor
	Alcohols
	Oligodynamic Action
	Surfactants/Surface-Active Agents
	Quaternary Ammonium Compounds (Quats)
	Nitrosamines
	Aldehydes
	Plasma
	Peroxygens

Created by: rewasson

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