Heat-wait-seek Method
Heat-wait-seek Method - Related Videos
08:39
Operant Sensation Seeking in the Mouse
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Cited by 27 •
2010
In this protocol we describe a method of operant learning using sensory stimuli as a reinforcer in the mouse. It requires no prior training or food restriction, and it allows the study of motivated behavior without the use of a pharmacological or natural reinforcer such as food.
11:01
Bacterial Transformation: The Heat Shock Method
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2023
Transformation is the process that occurs when a cell ingests foreign DNA from its surroundings. Transformation can occur in nature in certain types of bacteria. In molecular biology, transformation is artificially reproduced in the lab via the creation of pores in bacterial cell membranes. Bacterial cells that are able to take up DNA from the environment are called competent cells. In the laboratory, bacterial cells can be made competent and DNA subsequently introduced by a procedure called...
07:46
Transformation of Plasmid DNA into E. coli Using the Heat Shock Method
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Cited by 438 •
2007
Transformation of plasmid DNA into E. coli using the heat shock method is a basic technique of molecular biology. It consists of inserting a foreign ...
10:35
A Procedure to Study the Effect of Prolonged Food Restriction on Heroin Seeking in Abstinent Rats
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Cited by 11 •
2013
A procedure that allows a demonstration of robust augmentation of drug seeking in food-restricted rats is described. Following heroin self-administration training, rats go through an abstinence period, in a drug-free environment, during which they are mildly food restricted. Drug seeking is then tested in the drug-associated environment.
08:54
A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats
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Cited by 14 •
2011
Animal models of relapse, known as reinstatement procedures, have been used extensively to study the role of stress in relapse to drug seeking. Here, we report on a method for inducing the reinstatement of cocaine seeking in laboratory rats via acute exposures to mild, intermittent electric footshock.
FAQs
Temperature determines how strongly a thermally activated process is promoted, while the waiting interval determines how far the transformation progresses before observation. Varying either parameter separates rapid changes from slower ones and helps map temperature-dependent behavior rather than treating the reaction as a single static event.
The measurement tracks changes in chemical species and local molecular environments, allowing the experiment to distinguish compositional change from altered surroundings. That sensitivity is especially useful when a process passes through transient states, because time-resolved observations can reveal evolving species or environments that a final endpoint would not show.
Repeated conditions create a comparative time and temperature series. Researchers can examine how quickly chemical species or local environments change, identify trends associated with thermal activation, and evaluate whether a transient state persists, appears, or disappears under another condition. The resulting pattern supports kinetic and mechanistic interpretation without relying on one observation.
A typical workflow coordinates three controlled stages: rapidly bring the sample to a selected temperature, maintain that condition for a defined wait, and then perform the NMR measurement. Repeating this sequence under altered temperatures or waiting periods produces comparable observations. Consistent timing and temperature control are therefore central to relating each measurement to reaction progress.
Meaningful comparisons require a specified heating temperature, a defined waiting period, and a measurement step applied consistently after the wait. Repeating the experiment with different temperatures or durations helps associate differences in observed chemical species or local environments with the selected condition and clarifies temperature-dependent behavior.
For reaction mechanisms, the approach follows chemical changes over time and can expose transient states that inform how a transformation proceeds. For phase transformations and other dynamic processes, measurements made after controlled thermal treatment show how species or local environments evolve. This makes the method useful when steady-state measurements cannot resolve changing behavior.