Morphological degradation of human hair cuticle due to simulated sunlight irradiation and washing

Richena, Marina; Rezende, Camila A.

doi:10.1016/j.jphotobiol.2016.06.002

Cited by 32 publications

(28 citation statements)

References 15 publications

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“…The presence of S and Ca can be associated to both cysteine‐rich α‐keratin and calcium‐binding proteins (called S100A3) . S100A3 is attached to hair keratin via disulfide bonds, which affords structural integrity to the hair fibers . The α‐keratin is the main component of human hair fibers, whereas Ca plays an important role in human hair growth .…”

Section: Resultsmentioning

confidence: 99%

“…[23] S100A3 is attached to hair keratin via disulfide bonds, which affords structural integrity to the hair fibers. [23] The α-keratin is the main component of human hair fibers, whereas Ca plays an important role in human hair growth. [24] The scattering from the Rh source was able to measure information from the light elements, such as C, H, and O, for the organic chemical composition of these samples.…”

Section: Resultsmentioning

confidence: 99%

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Wavelength dispersive X‐ray fluorescence (WDXRF) and chemometric investigation of human hair after cosmetic treatment

Santos¹,

Sperança

Pereira³

2018

X-Ray Spectrometry

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Variations in the chemical composition of 63 different human and 6 different synthetic hair samples were investigated using wavelength dispersive X‐ray fluorescence (WDXRF) spectra profiles. To evaluate the effect of cosmetic treatment on the strands, the human hair samples were bleached, but the synthetic ones were not. To better investigate the data, exploratory analyses were calculated using principal component analysis for the WDXRF spectra. Eight normalizations/standardizations were applied in the WDXRF to verify the clustering tendency. Bleaching was tested, because it is one way in which people mask their real hair color. After the data were standardized, an enhancement of the data discrimination was verified. Furthermore, the explained variance was higher in the first principal components. The WDXRF spectra were able to distinguish samples with distinct features, including synthetic, dyed, and straightened hair. The findings of this study hold promise for forensics due to desirable aspects such as nondestructivity and the possibility of a large hair sample database.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Wavelength dispersive X‐ray fluorescence (WDXRF) and chemometric investigation of human hair after cosmetic treatment

Santos¹,

Sperança

Pereira³

2018

X-Ray Spectrometry

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show abstract

“…Lipid bonds within the endocuticle and CMC appear to be stronger in some populations than in others, thus preventing or limiting the amount of damage to the cuticle layer (Smith et al, 2013;Wolfram & Lindemann, 1971). Cuticle breakage and damage from grooming may alter the number of cuticle layers along a hair shaft (Camacho-Bragado et al, 2015;Meyer, Schnapper, & Hülmann, 2002;Richena & Rezende, 2016). Although interscale distance (average distance between two successive cuticle cells) is correlated with hair growth rate (Saint Olive Baque et al, 2012), critical information about differences in the cuticle layers among populations has not yet been published.…”

Section: Cuticlementioning

confidence: 99%

The biology of human hair: A multidisciplinary review

Koch

Tridico²,

Bernard

et al. 2019

American J Hum Biol

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In the last century, human scalp hair morphology has been studied from multiple, and sometimes mutually exclusive, perspectives by anthropologists, biologists, geneticists, forensic scientists, and cosmetic scientists. Here, we review and synthesize historical and current research on hair to better understand the scientific basis and biological implications of hair microstructure and morphology. We revisit the origins of existing nomenclature regarding hair morphology and classifications, discuss the currently recognized limitations to hair analysis within the varied scientific disciplines studying hair, point out aspects of hair biology that remain unknown, and the great potential for integrating these diverse perspectives and expertise in future scientific investigations, while highlighting the benefits of combining nondestructive microscopical analysis with chemical and genomic analyses for explicating hair biology. Further, we propose consensus terminology for root growth stages through descriptions and images that will aid in the morphological and microscopical analysis of human scalp hair, thereby reducing confusion and the promulgation of inaccurate information that is presently in the literature.

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“…High heat on the scalp can lead to various diseases, including hair loss, and is also known to have a negative impact on hair . In this study, the scalp temperature of 125 participants was measured in five areas: The frontal area, vertex area, occipital area, right temporal area, and left temporal area, using the contactless thermometer.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of factors triggering sensitive scalp in Korean adult women

Park¹,

Kim²,

Oh³

et al. 2019

Skin Res Technol

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Background The scalp care market is growing rapidly and research into the factors associated with sensitive scalp is performed in many countries. However, to the best of our knowledge, no previous study has examined the factors triggering sensitive scalp in Korean women. Thus, the aim of our study was to establish objective standards for sensitive scalp, investigate factors that trigger this condition, and determine the ratio of sensitive scalp in Korean women. Methods A total of 125 Korean adult women participated in the study. The participants answered the questionnaire, had their scalp temperature measured, and the sensitive scalp condition was evaluated and analyzed. Results Compared to the non‐sensitive scalp (NS) group, the sensitive scalp (SS) group had a significantly higher average temperature and increased heat sensation, dandruff, erythema in the scalp, past history of atopy, history of hair loss, medical history of scalp disease, concern for scalp care, and interest in mild products and frequency of use. The majority of participants in the SS group had a dry scalp, and itching was common. Conclusion This study may help us to understand the characteristics of the sensitive scalp in Korean females and determine factors associated with triggering a sensitive scalp.

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Morphological degradation of human hair cuticle due to simulated sunlight irradiation and washing

Cited by 32 publications

References 15 publications

Wavelength dispersive X‐ray fluorescence (WDXRF) and chemometric investigation of human hair after cosmetic treatment

Wavelength dispersive X‐ray fluorescence (WDXRF) and chemometric investigation of human hair after cosmetic treatment

The biology of human hair: A multidisciplinary review

Evaluation of factors triggering sensitive scalp in Korean adult women

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