Laboratory Heating
Laboratory Heating - Related Videos
06:19
Decontamination for Laboratory Biosafety
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2023
Robert M. Rioux and Zhifeng Chen, Pennsylvania State University, University Park, PA Decontamination is essential for laboratory biosafety, as the accumulation of microbial contamination in the laboratory can lead to the transmission of disease. The degree of decontamination can be classified as either disinfection or sterilization. Disinfection aims to eliminate all pathogenic microorganisms, with the exception of bacterial spores on lab surfaces or equipment. Sterilization, on the other hand,...
02:46
Quantifying Heat
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2025
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
01:12
Heat Flow and Specific Heat
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2023
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
01:16
Specific Heat
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2019
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units. For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or 4186 J/kg/K.
07:27
Making Solutions in the Laboratory
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2023
The ability to successfully make solutions is a basic laboratory skill performed in virtually all biological and chemical experiments. A solution is a homogenous mixture of solute dissolved in bulk liquid known as the solvent. Solutions can be described by their solute concentration, a measure of how much solute is present per unit of solution. In this video, a step-by-step procedure for how to make a water-based, or aqueous, solution for biological applications is presented. The video...
FAQs
Heat-transfer mode determines how evenly thermal energy reaches a biological sample. Conduction passes heat through direct contact, convection distributes heat through moving fluid, and radiation transfers energy without direct contact. Selecting among these mechanisms matters because the heating method must match the material and desired temperature uniformity, helping experiments produce consistent rather than variable results.
Temperature control is central because biological reactions and materials can respond differently to thermal exposure. A defined temperature reduces variation between samples, while controlled exposure time limits unintended changes during processing. This is especially important when heating supports enzyme reactions, nucleic acid workflows, or heat-sensitive components, where inconsistent conditions can reduce reproducibility or compromise the intended experimental outcome.
Laboratory heating instruments serve different biological workflows rather than providing interchangeable conditions. Hot plates, water baths, and heating blocks regulate temperature for materials or samples, whereas incubators support temperature-controlled cultivation or maintenance of organisms and cells. The relevant choice depends on whether the task requires heating a preparation, maintaining a biological system, or preserving defined exposure conditions.
Reliable heating begins by defining the required temperature and exposure time, then applying thermal energy with an instrument suited to the sample or system. The material is heated through conduction, convection, or radiation under regulated conditions. Keeping those variables consistent helps limit temperature variation and supports repeatable outcomes across media preparation, dissolution, reactions, and other biological workflows.
During media preparation and sample dissolution, heating helps produce usable, consistent materials before downstream biological work. In enzyme reactions and nucleic acid workflows, the thermal condition becomes part of the experimental setup rather than a minor handling detail. Controlled temperature and exposure time support reproducibility and help protect components that are sensitive to excessive or inconsistent heating.
In cell and organism work, incubators provide a way to maintain defined thermal conditions over the period needed for cultivation or maintenance. This application differs from briefly heating a preparation because the biological system itself remains under temperature control. Stable conditions can therefore support consistent cellular or organismal handling while reducing variation linked to changing thermal exposure.