What is Tyndallization quizlet?
Tyndallization. An old process for sterilizing food. – A simple, effective, modern sterilizing method is to heat the substance being sterilized to 121°C for 15 minutes in a pressured system.
What instrument is most effective for pressure temperature sterilization?
Autoclaves
Autoclaves are the instrument which is most effective for pressure temperature sterilization.
Which of the following microbial forms have the highest resistance to physical and chemical controls?
Bacterial endospores
Bacterial endospores are the microbial forms have the highest resistance to physical and chemical controls.
What term describes removal of vegetative cells and endospores?
Disinfection. the destruction or removal of vegetative pathogens but not bacterial endospores by a physical process or chemical agent; usually used on inanimate objects.
What is the difference between pasteurization and Tyndallization?
Tyndallization is a sterilization method that kills all forms of microbial life, including the spores. On the other hand, pasteurization is a method of eliminating pathogenic microorganisms mainly from milk and some other beverages. But, pasteurization does not kill spores. Hence, it is not a sterilization method.
What do you use autoclaving pasteurization and Tyndallization for?
The processes of both autoclaving and pasteurisation are used to kill and eliminate pathogens or microorganisms such as bacteria, fungi, viruses, etc. Pasteurising is most commonly associated with eliminating harmful microorganisms in some types of food – especially dairy products, wine, and eggs.
What radiation excites atoms to a higher energy?
– or /i>-particles. Radiation at the low-energy end of the electromagnetic spectrum, such as radio waves and microwaves, excites the movement of atoms and molecules, which is equivalent to heating the sample. Radiation in or near the visible portion of the spectrum excites electrons into higher-energy orbitals.
Which two antibiotics affect nucleic acids of bacteria?
The nucleic acid synthesis inhibitors rifamycins and fluoroquinolones target bacterial RNA transcription and DNA replication, respectively.
What are the two most resistant microbial forms?
Different groups of bacteria vary in their susceptibility to biocides, with bacterial spores being the most resistant, followed by mycobacteria, then Gram-negative organisms, with cocci generally being the most sensitive. There are wide divergencies within this general classification.
What defines disinfection?
Disinfection describes a process that eliminates many or all pathogenic microorganisms, except bacterial spores, on inanimate objects (Tables 1 and 2). Low-level disinfectants can kill most vegetative bacteria, some fungi, and some viruses in a practical period of time (≤10 minutes).
Which type of bacteria has a rod shaped structure?
A bacillus (plural bacilli), or bacilliform bacterium, is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria.
What is meant by tyndallization?
Tyndallization is a process dating from the nineteenth century for sterilizing substances, usually food, named after its inventor John Tyndall, that can be used to kill heat-resistant endospores.
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