Co2 Demonstration
Co2 Demonstration - Related Videos
10:22
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Polymer melts are often formed into simple shapes or "extrudates", such as cylindrical pellets, flat sheets, or pipe, using an extruder.1 Polyolefins are among the most common extrudable polymers. Extrusion involves transporting and melting solid feed, which is sometimes mixed with non-polymeric materials, and the pressure build-up and transport of the melt or mixture.
08:35
Demonstration of the Rat Ischemic Skin Wound Model
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Cited by 32 •
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The rat, due to its size, availability, and rather docile behavior, has been utilized as a research model for many years. The goal of this protocol is to utilize the rat as an ischemic skin wound healing model to provide valuable insight into the pathophysiology of chronic wounds.
06:44
Demonstration of Cutaneous Allodynia in Association with Chronic Pelvic Pain
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Cited by 22 •
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A demonstration of the bedside test for cutaneous allodynia and its clinical implications.
10:01
Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
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Cited by 8 •
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11:56
Historical View and Physiology Demonstration at the NMJ of the Crayfish Opener Muscle
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Cited by 33 •
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The opener muscle of the crayfish leg is presented for its historical importance and experimental versatility in muscle phenotype, synaptic physiology and plasticity.
FAQs
When carbon dioxide dissolves in water, it forms carbonic acid. This increases the water’s acidity and lowers its pH, so an acid–base indicator changes color. The color shift converts an invisible chemical change into a visible observation, allowing students to connect gas dissolution with measurable changes in water chemistry.
These processes represent distinct ways carbon dioxide can enter the surrounding environment. Respiration, combustion, and chemical reactions can each produce gas that is collected and tested, allowing observers to compare how different carbon transformations generate the same detectable product. This comparison links biological activity, burning, and laboratory reactions to carbon movement.
The activity connects an observable gas signal with larger environmental processes. Carbon dioxide produced during biological activity or combustion relates to exchanges between sources and sinks in the carbon cycle, while its presence in the atmosphere relates to greenhouse warming. Demonstrations therefore provide a concrete starting point for discussing human effects on climate and atmospheric composition.
Two observations are especially informative: whether gas can be collected from a process and whether it produces a pH-related indicator change after dissolving in water. Together, these results provide evidence that the process generated carbon dioxide and that the gas has a chemical effect on water, rather than remaining only an unseen atmospheric component.
A basic workflow begins with a process that produces carbon dioxide, followed by collection of the resulting gas and testing in water with an indicator. Observers then record the visible color response as evidence of lowered pH. This sequence connects gas production, collection, dissolution, and chemical detection without treating any single observation in isolation.
It is useful when instruction or investigation needs to connect an invisible gas with environmental evidence. The activity supports discussion of gas exchange, carbon sources and sinks, atmospheric composition, human impacts on climate, and the importance of monitoring carbon. Its value lies in linking a simple measurable response to broader environmental questions.