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Heat

Heat

(Science: chemistry) energy transferred between two objects because of a temperature difference, the thermal motion of atoms and molecules. For chemical systems the sign for heat flow into the system is positive, because this process increases the internal energy of the system. Heat flowing out of the system is defined to be negative, since this process decreases the internal energy of the system. A form of energy that is transferred by a difference in temperature.


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Re: sterilization in microwave oven

... than wash instruments in soap and water. The method of 'inspissation' came into use after the turn of the 20th century. A culture medium would be heated to boiling and then held at room temperature or even incubated for a few hours to a day or two. The heat killed all vegetative forms, and the ...

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by fdgsr
Tue Mar 18, 2014 3:13 pm
 
Forum: Microbiology
Topic: sterilization in microwave oven
Replies: 29
Views: 93684

Re: Re:

... to extinguish it? I assume whatever chemical imbalance that caused the combustion, had been used up within a second or so, but the remaining heat allowed for the skin to catch fire and go on from there, where it was put out like a normal fire, but there was fire damage on the inside of the ...

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by Coelacanth
Sat Feb 22, 2014 10:36 pm
 
Forum: General Discussion
Topic: [News] Frank Baker survives ''spontaneous combustion''
Replies: 5
Views: 684

Re:

... happens is a metabolic runaway event or a chemical reaction. the nerves produce small currents but even though small those currents generate some heat and a short-circuit of the nervous system is thought of as another possible cause for the source of heat .

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by Coelacanth
Fri Jan 03, 2014 1:53 pm
 
Forum: General Discussion
Topic: Help! I'm freaking out so badly please answer this!
Replies: 14
Views: 2133

Re: Help! I'm freaking out so badly please answer this!

... complex chemical reactions occuring in the body each second so I was wondering if an overproduction of reactive chemicals could produce a lot of heat and cause a persons surface to catch fire, or a metabolic runaway event of some kind . Yes, there are complex reactions but none that would result ...

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by Coelacanth
Fri Jan 03, 2014 12:36 pm
 
Forum: General Discussion
Topic: Help! I'm freaking out so badly please answer this!
Replies: 14
Views: 2133

Re: Help! I'm freaking out so badly please answer this!

... complex chemical reactions occuring in the body each second so I was wondering if an overproduction of reactive chemicals could produce a lot of heat and cause a persons surface to catch fire, or a metabolic runaway event of some kind . Yes, there are complex reactions but none that would result ...

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by Tricho
Fri Jan 03, 2014 11:33 am
 
Forum: General Discussion
Topic: Help! I'm freaking out so badly please answer this!
Replies: 14
Views: 2133
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