Unit Operations Programming
Unit Operations Programming - Related Videos
08:39
Operant Sensation Seeking in the Mouse
0 Views •
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.
03:38
Measurement: Standard Units
0 Views •
2020
Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results. The number in the measurement can be represented in different ways, including decimal form and scientific notation, which is...
03:02
Measurement: Derived Units
0 Views •
2020
The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units. Units of measurement derived from the mathematical combination of SI base units are called SI-derived units. For example, the ratio of the SI unit for distance (meter; m) and the SI unit for time (second; s) gives the SI-derived unit...
07:29
Programmed Electrical Stimulation in Mice
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Cited by 48 •
2010
Programmed electrical stimulation provides the ability to determine conduction properties of the heart, and the possibility to induce and terminate cardiac arrhythmias using various pacing protocols. Using a transvenous catheter, intracardiac electrogram recordings can be obtained in mice following programmed electrical stimulation protocols to identify arrhythmogenic substrates.
10:23
A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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2025
The protocol presented here aims to guide the users on the computer-based processing of cytochrome c oxidase subunit I (COI) gene sequences generated from beetles, such that the species clustering hypothesis called molecular operational taxonomic units (MOTUs) can be generated from DNA.
FAQs
Mass and energy balances provide the accounting framework for each modeled process step. The program uses them to relate inlet and outlet streams, accumulation, heat transfer, and operating conditions, allowing calculated values to remain physically consistent. This approach helps identify how changes in composition, temperature, pressure, or flow rate affect material distribution and energy requirements.
Thermodynamic relationships describe how temperature, pressure, and composition influence process behavior, while transport principles connect those conditions with movement of heat, mass, or material. Including both types of relationships makes the calculation more representative of an actual unit operation than using balances alone. Their combined use supports equipment-performance estimates and comparison of operating conditions.
Treating separation, mixing, heating, and reaction steps as individual computational units makes a process easier to analyze and modify. Each step can receive specified inputs, calculate its own outputs, and pass those results to the next operation. This modular structure helps isolate sources of unexpected behavior and supports systematic evaluation of complete chemical processes.
Temperature, pressure, composition, and operating rates are central variables because they influence calculated material flows and equipment performance. A change in one variable can alter the relationships used by the model and therefore affect downstream results. Testing these variables under specified conditions allows users to evaluate sensitivity, compare alternatives, and recognize operating conditions that may require further analysis.
A practical workflow begins by selecting the unit operation and specifying its relevant conditions, inputs, and required relationships. The program then applies mass and energy balances together with thermodynamic or transport principles to calculate process variables. Results can be reviewed for material-flow consistency and equipment performance before repeating the calculation under alternative conditions for design or troubleshooting.
Calculated material flows and estimated equipment performance give researchers a basis for comparing process conditions before changing the physical system. Repeated calculations can examine alternatives for design or optimization, while discrepancies between expected and calculated behavior can aid troubleshooting. The same framework also helps connect laboratory observations with larger-scale process analysis by expressing chemical theory through reproducible engineering calculations.