Characteristic features of Japanese women's hair with aging and with progressing hair loss

Tajima, Masahiro; Hamada, Chika; Arai, Takayuki; Miyazawa, Motoki; Shibata, Ritei; Ishino, Akihiro

doi:10.1016/j.jdermsci.2006.10.011

Cited by 77 publications

(75 citation statements)

References 19 publications

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“…Yürüker et al diagnosed TE if follicles were 20% telogen by trichogram evaluation (14). In the study by Tajima et al, the patients' pictures were taken with a videodermoscope just after shaving the area of hair, and the percentage of anagen hair was 84% (13). However, we think that the calculation of the anagen/telogen ratio should wait until the hair has regrown.…”

Section: Discussionmentioning

confidence: 99%

Is TrichoScan a new diagnostic method for diffuse hair loss?

Özkol¹,

Çalka²,

Akdeniz³

2014

Turk J Med Sci

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This study was conducted at the experimental area of the Field Crops Department of Çukurova University (37°01′N, 35°18′E) in the 2010 and 2011 growing seasons to determine the effects of sole or combined applications of 3 organic materials (poultry litter, cattle manure, and leonardite) with supplemental inorganic fertilizer on the forage yield and quality of silage maize. The field trial was arranged in a complete randomized block design with 3 replications. Poultry litter (PL) and cattle manure (CM) were applied based on P or N requirements (PL-P, PL-N, CM-P, and CM-N) of the crop, whereas leonardite was applied in only 1 dose (500 kg ha -1 ) and was also combined with 3 inorganic fertilizer doses (100%, 75%, and 50% of the recommended inorganic fertilizer dose, called LEO-100, LEO-75, and LEO-50, respectively). The results show that the highest values of dry matter (DM) and crude protein (CP) yields (18.3 t ha -1 and 1652 kg ha -1 , respectively) were observed in LEO-100, whereas the lowest (11.2 t ha -1 and 758 kg ha -1 , respectively) were observed in PL-N. In terms of forage quality parameters (CP, acid detergent fiber, neutral detergent fiber, and relative feed value), the P-based poultry litter and cattle manure treatments (PL-P and CM-P) gave similar results to conventional fertilization treatment, whereas the N-based treatments (PL-N and CM-N) significantly decreased forage quality. The combined use of organic materials with inorganic fertilizers instead of a conventional fertilization regime may be effective in maintaining forage supply but N-based treatments have the risk of restricting forage production from silage maize.

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Section: Discussionmentioning

confidence: 99%

Is TrichoScan a new diagnostic method for diffuse hair loss?

Özkol¹,

Çalka²,

Akdeniz³

2014

Turk J Med Sci

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“…Japanese women showed a tendency to increase until their 40s, and then declined with age [7]. It is interesting that there are differences in the symptoms of hair ageing among Asians.…”

Section: Introductionmentioning

confidence: 99%

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

Kim¹,

Kim²,

An³

et al. 2017

JCDSA

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There are previous studies of ageing hair and scalp in Caucasians and some Asians, such as Koreans and Japanese. However, the characteristics of scalp and hair have not yet been studied in Chinese, the largest population in the world, especially in terms of ageing. The purpose of this study is to investigate ageing features in Chinese women's hair and scalp. Methods: In total, 1343 women in China aged 20 to 65 participated in this research. Hair density and diameter were measured and analysed with Folliscope®. Hair color and scalp conditions such as dandruff and erythema were evaluated through microscopic images. Measuring equipment was also used to detect scalp water content, barrier function and sebum secretion. Results: Hair density decreased gradually with ageing, while hair diameter peaked at 40s. The color of hair became bright with ageing because of gray hair and color fading. The degree of scalp sebum and dandruff was higher at younger ages. Interestingly, scalp erythema became more severe with ageing. Conclusion: This study shows the physical and physiological changes of Chinese women's hair and scalp. Most aging features (hair diameter, scalpsebum contents, dandruff and erythema) were noticeable in their 40s, but hair density began to decline in their 30s. This first study of aging hair and scalp in Chinese women would be helpful for understanding the ageing phenomenon and development of hair and scalp care products.

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“…Frontal and occipital hair density showed a wide range of values but showed a decreasing trend after age after 40 indicating that chronologic age but not menopause status dictates alterations in hair density [5].…”

Section: Differences In Hair Parameters Between Pre-and Postmenopausamentioning

confidence: 95%

“…Hair follicles may remain in a state of latency, also known as kenogen, for a prolonged period after the club hair is shed before a new cycle begins [5].…”

Section: The Hair Cyclementioning

confidence: 99%