Human Hair Carbon
Human Hair Carbon - Related Videos
08:38
Extraction and Analysis of Cortisol from Human and Monkey Hair
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Cited by 199 •
2014
Cortisol (CORT) accumulates in the growing hair shaft of humans and nonhuman primates. We describe methods for extracting and analyzing hair CORT with high precision and sensitivity. Measurement of hair CORT is particularly well-suited for assessing chronic stress over periods of weeks to months.
08:36
Generation of Integration-free Human Induced Pluripotent Stem Cells Using Hair-derived Keratinocytes
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Cited by 12 •
2015
This manuscript provides a step-by-step procedure for the derivation and maintenance of human keratinocytes from plucked hair and subsequent generation of integration-free human induced pluripotent stem cells (hiPSCs) by episomal vectors.
07:00
Isolation and Culture of Neural Crest Stem Cells from Human Hair Follicles
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Cited by 19 •
2013
This article presents a robust protocol for isolation and culture of neural crest stem cells from human hair follicles.
01:22
Hair Cells
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2019
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here. Hair cells are named after...
08:01
Fabrication of 3D Carbon Microelectromechanical Systems (C-MEMS)
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Cited by 6 •
2017
Long and hollow glassy carbon microfibers were fabricated based on the pyrolysis of a natural product, human hair. The two fabrication steps of carbon microelectromechanical and carbon nanoelectromechanical systems, or C-MEMS and C-NEMS, are: (i) photolithography of a carbon-rich polymer precursor and (ii) pyrolysis of the patterned polymer precursor.
FAQs
Thermal treatment conditions determine how human hair carbon develops as an engineering material. Temperature and atmosphere influence the conversion of keratin and other organic constituents during pyrolysis, while subsequent activation can further alter the resulting properties. Engineers therefore select and compare processing conditions according to the intended balance of surface chemistry, pore structure, and conductivity.
Pyrolysis changes the original hair chemistry by decomposing keratin and other organic constituents under thermal treatment. The material left behind is carbonaceous and may contain a porous structure, giving processing a direct role in the functional behavior of the final solid. This transformation matters because adsorption, catalyst support, and electrode uses depend on engineered material properties rather than simply on the waste source.
Surface chemistry, pore structure, and conductivity should be considered together because each describes a different aspect of performance. Surface chemistry and porosity are directly relevant when the material is developed for adsorption, while conductivity becomes especially important for electrode development. Linking these properties to processing conditions helps engineers select material designs for specific functions.
A basic engineering workflow begins with discarded human hair, followed by thermal treatment under a selected temperature and atmosphere so pyrolysis can form a carbonaceous material. Subsequent activation may be included to modify the material further. Each stage connects processing conditions with the resulting surface chemistry, pore structure, and conductivity, which guide later application choices.
Adsorption and catalyst-support applications rely on engineered features of the carbonaceous product, particularly its surface chemistry and often porous structure. Thermal conversion and any subsequent activation influence those features, allowing the material to be considered for functions beyond waste disposal. Engineering studies can therefore relate processing choices to how effectively the resulting solid serves these material-support or surface-interaction roles.
Electrode development makes conductivity an important property to connect with processing conditions. The carbonaceous product can be investigated as an electrode material within energy-storage systems, while its surface chemistry and pore structure provide additional design variables. This research context links waste valorization with materials engineering by treating discarded hair as a source for functional carbon rather than only as a disposal problem.