Related Experiment Video
Updated: May 5, 2026

07:40
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
Published on: March 13, 2011
24.9K
Incorporation of trace elements from environment into the hair structure
1Ruder Bošković Institute, POB 1016, 41001, Zagreb, Yugoslavia.
Biological Trace Element Research
|November 21, 2013
Summary
A new model explains how environmental trace elements enter hair. The model accurately predicts element distribution within hair structure, matching real-world data.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Hair serves as a passive accumulator of environmental trace elements.
- Understanding trace element incorporation into hair is crucial for biomonitoring and forensic applications.
- Existing models may not fully capture the complex diffusion and deposition processes.
Purpose of the Study:
- To develop a predictive model for trace element incorporation into hair.
- To simulate radial and longitudinal elemental concentration profiles within hair.
- To validate model predictions against experimental elemental data.
Main Methods:
- Development of a mathematical model based on diffusion and deposition principles.
- Simulation of trace element transport within the hair shaft.
- Comparison of model-generated concentration profiles with empirical data.
Main Results:
- The model successfully describes the incorporation of trace elements into hair.
- Predicted radial concentration profiles align with theoretical expectations.
- Predicted longitudinal concentration profiles show satisfactory agreement with experimental data.
Conclusions:
- The presented model offers a robust framework for understanding hair-environment elemental exchange.
- Model predictions provide valuable insights into trace element distribution in hair.
- This work contributes to the accurate interpretation of hair as a biomonitoring matrix.
Related Concept Videos
Accessory Structures of the Skin: Hair Growth and Types
2.8K
Hair growth begins with the production of keratinocytes by the basal cells of the hair bulb. As new cells are deposited at the hair bulb, the hair shaft is pushed through the follicle toward the surface. Keratinization is completed as the cells are pushed to the skin surface to form the shaft of hair that is externally visible. The external hair is completely dead and composed entirely of keratin. Hair can be cut or shaven without damaging the hair structure because the cut is superficial. Most...
2.8K
Accessory Structures of the Skin: Hair and Hair Follicles
5.2K
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
5.2K
Hair Cells
36.2K
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.
36.2K
Microbes and Other Elemental Cycles
94
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
94
Inheritance of Chromatin Structures
6.0K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.0K
Multipotency and Niche of Bulge Stem Cell
3.0K
A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
3.0K

