Nail Growth: 30 Years of Observation

Bean, William B.

doi:10.1001/archinte.1974.00320210107015

Cited by 51 publications

(16 citation statements)

References 14 publications

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“…The rate of nail growth is highly variable between individuals, but relatively stable within an individual (Samman 1986). Nails grow, on average, between 0.5 to 1.2 mm/week with a decrease in this rate with age (Bean 1974;Hamilton et al, 1955;Hillman 1955;Kandil 1972;Orentreich et al, 1979). Seasonal changes and moderate temperature fluctuations do not appear to significantly affect growth rate (Donovan 1977).…”

Section: Hair and Nail Growthmentioning

confidence: 98%

Seasonal fluctuations in diet and death during the late horizon: a stable isotopic analysis of hair and nail from the central coast of Peru

Williams

Katzenberg

2012

Journal of Archaeological Science

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Section: Hair and Nail Growthmentioning

confidence: 98%

Seasonal fluctuations in diet and death during the late horizon: a stable isotopic analysis of hair and nail from the central coast of Peru

Williams

Katzenberg

2012

Journal of Archaeological Science

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“…For example, nail growth is faster during warm summer months than in the winter. 27 However, as mentioned by Bean, the use of central heating in the winter and air conditioning in the summer has diminished this effect to a certain degree. Although this spread appears relatively large it is not surprising given the circumstances of the subjects involved.…”

Section: Longitudinal Studymentioning

confidence: 99%

The role of stable isotopes in human identification: a longitudinal study into the variability of isotopic signals in human hair and nails

Fraser

Meier‐Augenstein

Kalin

2006

Rapid Comm Mass Spectrometry

126

124

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Recent natural catastrophes with large-scale loss of life have demonstrated the need for a new technique to provide information for disaster victim identification when DNA methods fail to yield the identification of an individual, or in other situations where authorities need to determine the recent geographical life history of people. The latter may be in relation to the identification of individuals detained on suspicion of terrorism or in relation to people-trafficking or smuggling. One proposed solution is the use of stable isotope profiling (SIP) using isotope ratio mass spectrometry (IRMS). Exploiting the link between the isotopic signal of dietary components and the isotopic composition of body tissue, the aim of this study was to refine a non-invasive method of analysing human material such as scalp hair and fingernails using SIP and to assess the degree of natural variability in these profiles. Scalp hair and fingernail samples were collected from British and non-British volunteers at Queen's University Belfast every 2 weeks for a minimum of 8 months. Samples were analysed using IRMS to determine their isotopic composition for 13C, 15N, 2H and 18O. The results of this longitudinal study yielded information on the natural variability of the isotopic composition of these tissues. The data demonstrate the relatively low degree of natural variation in the 13C/15N isotopic abundance of scalp hair and fingernails whilst greater variations were recorded in the hydrogen and oxygen values of the same samples. The 15N and 18O values of nail are noticeably more variable than that of scalp hair from the same subject. A hypothesis explaining this trend is put forward based on the faster rate of formation of hair than of nails. This means that there is less time for the compounds forming hair to be affected by biochemical processes that could alter their isotopic signature.

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“…Osler’s original suggestion had been to mark the nail with an indelible stain such as silver nitrate, but Bean preferred to file a groove in the nail each month. In 1974, nearly 100 years after Osler’s original remarks, Bean wrote ‘The nail still grows, albeit more slowly.’ 69,70 Bean was a keen follower of Osler and published a ‘mosaic’ of his bedside sayings and aphorisms. 71 He also wrote a fine book on Vascular abnormalities of the skin 72 —another subject close to Osler’s heart.…”

Section: Osler’s Dermatological Interestsmentioning

confidence: 99%

Osler and the skin

Savin

2000

British Journal of Dermatology

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William Osler was the greatest physician of his time. Specialists reading his textbooks agreed that in their own specialities he was accurate and illuminating. His grasp of dermatology was particularly striking and skin changes are prominent in five of the syndromes named after him and in at least 100 of his papers. This paper describes how his early training in dermatology under Tilbury Fox in London and Hebra in Vienna combined with his unusual personal qualities to enable him to make massive contributions to a wide variety of dermatological topics. These include smallpox, cutaneous tuberculosis, nail growth, leprosy, scleroderma, pigmentation and purpuric eruptions as well as the more obvious hereditary haemorrhagic telangiectasia, angio-neurotic oedema and Osler's nodes.

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Nail Growth: 30 Years of Observation

Cited by 51 publications

References 14 publications

Seasonal fluctuations in diet and death during the late horizon: a stable isotopic analysis of hair and nail from the central coast of Peru

Seasonal fluctuations in diet and death during the late horizon: a stable isotopic analysis of hair and nail from the central coast of Peru

The role of stable isotopes in human identification: a longitudinal study into the variability of isotopic signals in human hair and nails

Osler and the skin

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