Paraffin Channel
Paraffin Channel - Related Videos
01:19
Ion Channels
0 Views •
2019
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange. Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
07:28
Paraffin-Embedded and Frozen Sections of Drosophila Adult Muscles
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Cited by 42 •
2010
Identification of mechanisms underlying muscle damage is crucial. Here we present the histological technique for preparing paraffin-embedded and frozen sections of Drosophila thoracic muscles. This allows analysis of muscle morphology and localization of protein and other muscle cell components.
03:08
Embedding Adult Drosophila Heads in Paraffin: Preparing Tissue for Histology
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2023
This video describes how to embed Drosophila heads in paraffin using the collar method, a technique that prepares fly heads for serial sectioning. Paraffin sections are used for histological examinations of the brain's anatomy and for the assessment of neurodegeneration. The featured protocol demonstrates how multiple flies can be processed in one preparation, thereby increasing time-efficiency and minimizing experimental artifacts.
13:32
DNA Extraction from Paraffin Embedded Material for Genetic and Epigenetic Analyses
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Cited by 131 •
2011
This video demonstrates the protocol for DNA extraction from formalin-fixed paraffin-embedded material. This is a multi-day procedure in which tissue sections are deparaffinized with xylene, rehydrated with ethanol and treated with proteinase K to purify and isolate DNA for subsequent gene-specific or genome-wide analysis.
11:27
Immunohistochemistry on Paraffin Sections of Mouse Epidermis Using Fluorescent Antibodies
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Cited by 2 •
2008
We describe a reliable method for immunolocalization within the epidermis modified for both frozen and paraffin sections that we use very routinely in our laboratory.
FAQs
The solidified wax creates regions that resist water penetration, while nearby hydrophilic parts of the porous material remain receptive to aqueous samples. Capillary action then draws liquid through those exposed pathways rather than across the wax barriers. This contrast between water-repelling and water-attracting regions allows researchers to guide samples along designed routes without enclosing them in conventional machined channels.
Heating temporarily liquefies the paraffin so it can penetrate the porous material and occupy selected regions. During cooling, the wax solidifies in place, preserving the intended barriers. The two-stage sequence is therefore essential: melting enables placement within the material, whereas solidification stabilizes the pattern that later confines and directs aqueous flow.
Hydrophilic regions provide the pathways through which aqueous samples can move after the paraffin has solidified. Their capillary behavior works together with the surrounding hydrophobic barriers, creating directional confinement rather than simply blocking liquid. In biological devices, this arrangement supports patterned flow and helps connect separate regions used for sample handling or analysis.
Paraffin-based pathways can be formed within porous materials through melting and cooling, rather than requiring complex machining or permanent bonding of separate channel structures. This fabrication approach can simplify device construction and reduce equipment requirements. Its main value is practical: researchers can incorporate guided flow into compact biological and analytical platforms using a less elaborate manufacturing strategy.
A typical workflow places paraffin in selected regions of a porous material, heats it so the wax melts and penetrates the material, and then allows cooling to solidify the pattern. An aqueous sample can subsequently enter the hydrophilic regions and move by capillary action. The resulting pathway supports controlled delivery or preparation within the device.
Applications include paper-based assays, sample preparation, reagent delivery, and low-cost diagnostic platforms. In each case, the patterned barriers help organize aqueous movement within a compact porous device. This arrangement can support the integration of multiple analytical steps, making it useful when researchers need coordinated processing without extensive equipment or elaborate channel fabrication.