A multi-level overview of the hair decomposition process

Area of Science:

• Forensic Science
• Biological Degradation Studies

Background:

• Hair fiber degradation mechanisms, including microbial and environmental influences, are not well-documented.
• Post-mortem root banding and protein breakdown (keratinolysis) are complex processes with unclear causes.
• Photodegradation and elemental changes during hair decomposition require further investigation.

Purpose of the Study:

• To systematically review and synthesize current knowledge on hair decomposition processes.
• To identify research gaps and propose future research directions in hair degradation.
• To highlight the potential of hair as a biological material in various scientific fields.

Main Methods:

• Literature review and synthesis of existing studies on hair decomposition.
• Analysis of cited publications to identify trends and knowledge gaps.
• Identification of potential applications based on hair's properties.

Main Results:

• Hair decomposition involves external factors (microorganisms, environment) and internal factors (hair matrix changes).
• Keratin breakdown and photodegradation are significant degradative pathways.
• Hair shows potential for post-mortem interval estimation, genetic studies, toxicology, and ecological analysis.

Conclusions:

• Comprehensive studies on hair decomposition are lacking.
• Standardized and validated methods for hair analysis are needed for forensic and industrial applications.
• Hair remains a valuable biological material requiring further research into its degradation pathways and applications.