January 2017 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” This study found that hair damage from sunlight and chemical processes like perms and bleaching varies in internal microstructure changes, suggesting that protective techniques should be tailored to the type of chemical treatment used.
Hair can show daily calcium changes, linked to body calcium levels and influenced by hormones, and can help assess calcium metabolism issues.
September 2001 in “PubMed” This study developed a non-destructive X-ray fluorescence technique to quantitatively analyze elemental content in human hair and constructed a database of element concentrations in healthy Swedish, Caucasian individuals.
January 1980 in “中国科学A辑(英文版)” This study found that the molecular structures of α-keratin and collagen in a 2,100-year-old female cadaver's hair and tendon were preserved, while fibrous molecule aggregations were altered.
June 1958 in “Mycopathologia” Selective chemical epilation effectively treats tinea capitis without harmful side effects.
2 citations
,
January 2004 in “AIP conference proceedings” This study suggests that hair analysis detecting trace elements like copper and iron may help in screening for diseases such as hepatocellular carcinoma and osteoporosis, due to altered element concentrations in patients.
1 citations
,
January 2007 in “AIP conference proceedings” This study used phase contrast hard x-ray microscopy to capture detailed images of healthy human hair, revealing distinct structures such as the medulla, cortex, and cuticular layer.
January 2025 in “Dermatologic Therapy” This retrospective study reported significant improvements in keloid scars among 60 patients treated with punch excision and superficial X-ray, with lower Vancouver Scar Scale and Patient and Observer Scar Assessment Scale scores a year post-treatment and no severe adverse reactions observed.
53 citations
,
September 1999 in “Journal of Synchrotron Radiation” This study shows that microdiffraction experiments reveal structural layers in keratinous tissues, each with different keratin types, potentially explaining their dual role as mechanical support and chemical barriers.
28 citations
,
July 2000 in “PubMed” This study found no structural differences between in vitro and in vivo grown hair, with keratinization and organization of keratin being comparable in both settings.
12 citations
,
January 2014 in “Journal of X-Ray Science and Technology” This study suggests that the optimum X-ray energy for microplanar beam radiation therapy to treat deep-seated tumors may range from 100 to 300 keV, based on therapeutic gain and surface dose considerations.
10 citations
,
January 1980 in “Ultrastructural pathology” This study suggests that elevated copper levels in domestic tapwater, exacerbated by its aggressive properties, likely contribute to green hair by damaging the cuticle and increasing copper uptake.
9 citations
,
January 2007 in “mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich)” This study analyzed dosimetric quantities in x-ray microbeam radiation therapy and found that the peak-to-valley dose ratio decreases with depth in the irradiated object.
2 citations
,
January 1986 in “PubMed” This study measured elemental content in anagen hair fibers of Caucasian people aged 10-69 and found average levels of sulfur, zinc, calcium, and chlorine, establishing a baseline for future research.
1 citations
,
November 2008 in “Acta crystallographica” This study reports the crystallization of the human androgen receptor's ligand-binding domain with nonsteroidal ligands, which may aid in understanding the differences in binding compared to steroidal ligands.
1 citations
,
January 2007 in “中国科学通报:英文版” Women's hair has more sulfur, and black hair has more calcium than white hair.
January 2026 in “Frontiers in Pharmacology” This study demonstrated that SHFKO significantly accelerated healing in acute radiation-induced skin injuries, with mechanisms involving apoptosis inhibition, suppression of inflammation, and restoration of ROS balance, suggesting its potential as a novel multi-target therapy for radiodermatitis.
September 2024 in “American Journal of Modern Physics” This study used X-ray fluorescence to analyze elemental and heavy metal contents in Senegalese powdered milk, finding potential safety concerns with excessive calcium in certain samples and significantly high potassium levels in one, suggesting ongoing monitoring is crucial for consumer safety.
May 2024 in “Plant and Soil” Among maize plants, this study observed that root hairs tend to grow in air-filled pores at the root-soil interface, but their growth into the soil matrix is limited, posing potential constraints on nutrient uptake, anchorage, and rhizosheath formation.
2 citations
,
January 1968 in “PubMed” This study found that X-irradiation causes hair dysplasia through two mechanisms influenced by oxygen, and cystamine injections after irradiation enhance this effect.
1 citations
,
February 2024 in “International Journal of Physics Research and Applications” In this study, powdered milk samples from Senegal showed varying levels of heavy metals, with some exceeding acceptable maximum levels for calcium, potassium, and phosphorus, indicating potential safety concerns.
15 citations
,
May 2013 in “International Journal of Cosmetic Science” This study found that while ethnic hair types share a common fibrous keratin structure, variations in keratin-associated proteins and lipids may lead to different macroscopic hair characteristics.
12 citations
,
January 2009 in “Breast Cancer Basic and Clinical Research” This study found that the combination of mammography and hair X-ray diffraction increased sensitivity for detecting breast cancer compared to using each method alone.
April 2019 in “Journal of the Endocrine Society” This case study reports a rare instance of ectopic ACTH secretion from a primary lung neuroendocrine tumor in a young woman, highlighting successful diagnosis and treatment following symptoms of Cushing syndrome, with normalization of ACTH, glucose, and cortisol levels post-surgery.
September 2025 in “Pakistan Journal of Science” This study observed that individuals with type 1 diabetes mellitus have notably lower levels of essential and trace elements like Calcium, Potassium, and Zinc in biological samples compared to non-diabetic controls.
12 citations
,
January 1934 in “Proceedings of the Royal Society of London Series B Containing Papers of a Biological Character” This study found that the X-ray patterns of stretched mammalian hair (β-keratin) are similar to those of natural silk (fibrion), suggesting a similar elastic mechanism involving reversible intra-molecular transformations.
70 citations
,
June 1998 in “Polymer” This study found that permanent waving treatment partially disrupts the α-helical structure in human hair microfibrils, primarily during the initial reduction phase, rather than just affecting disulphide bonds.
48 citations
,
January 2014 in “Dermatology Online Journal” This review examines various treatments for dissecting cellulitis, noting isotretinoin may offer the best chance for remission despite limited long-term data and calls for more clinical studies.
42 citations
,
January 2005 in “Applied spectroscopy” In this study, hair samples from breast cancer patients showed increased β-sheet structures and lipid content, with spectral markers successfully identifying cancer in a blind test but also producing false positives.