Determination in vivo of water concentration profile in human stratum corneum by a photoacoustic method

1981 ◽  
pp. 187-195 ◽  
Author(s):  
I. Simon ◽  
A. G. Emslie ◽  
C. M. Apt ◽  
I. H. Blank ◽  
R. R. Anderson
Keyword(s):  
Stratum Corneum ◽  
Concentration Profile ◽  
Water Concentration ◽  
Human Stratum Corneum ◽  
Photoacoustic Method

scholarly journals Estimation of In Vivo Water Content of the Stratum Corneum from Electrical Measurements

2009 ◽  
Vol 3 (1) ◽  
pp. 8-12 ◽  
Author(s):  
Gorm Krogh Johnsen ◽  
Ø.G Martinsen ◽  
S Grimnes
Keyword(s):  
Stratum Corneum ◽  
Water Content ◽  
Uniform Distribution ◽  
Concentration Profile ◽  
Low Frequency ◽  
Water Concentration ◽  
Electrical Measurements ◽  
Equilibrium Water Content

In vivo water content in the epidermal stratum corneum can be estimated by means of low frequency susceptance measurements. In the in vitro calibration necessary to find the in vivo water content, the stratum corneum will have a uniform distribution of water across its thickness. However, in vivo stratum corneum has an increasing water concentration profile from the outermost towards the innermost parts. This paper will investigate the possibility of estimating the equilibrium water content in the in vivo stratum corneum non-invasively from electrical susceptance measurements. Given a known shape of the water concentration profile in the in vivo stratum corneum and the dependence of susceptance on the water content, it is possible to calculate the water content in vivo based on analytically derived expressions for the water concentration profile. A correspondence between in vivo and in vitro water content needed for this purpose is also established.

Human Skin Binding and Absorption of Contaminants from Ground and Surface Water During Swimming and Bathing

1989 ◽  
Vol 8 (5) ◽  
pp. 853-859 ◽  
Author(s):  
Ronald C. Wester ◽  
Howard I. Maibach
Keyword(s):  
Surface Water ◽  
Stratum Corneum ◽  
Human Skin ◽  
The Body ◽  
Water Soluble ◽  
Exposure Effect ◽  
Human Stratum Corneum ◽  
Water Dilution

Contaminants exist in ground and surface water. Human skin has the capacity to bind and then absorb these contaminants into the body during swimming and bathing. Powdered human stratum corneum will bind both lipid-soluble (alachlor, polychlorinated biphenyls [PCBs], benzene) and water-soluble (nitroaniline) chemicals. In vitro (human skin) and in vivo (Rhesus monkey) studies show that these chemicals readily distribute into skin, and then some of the chemical is absorbed into the body. Linearity in binding and absorption exists for nitroaniline over a 10-fold concentration range. Multiple exposure to benzene is at least cumulative. Binding and absorption can be significant for exposures as short as 30 min, and will increase with time. Absorption with water dilution increased for alachlor, but not for dinoseb. Soap reversed the partitioning of alachlor between human stratum corneum and water. The PCBs could be removed from skin by soap and water (70% efficiency) for up to 3 h and then decontamination potential decreased, due to continuing skin absorption. The model in vitro and in vivo systems used should permit easy estimation of this area of extensive human exposure effect on risk assessment.

scholarly journals The Effect of in Vivo Occlusion on Human Stratum Corneum Hydration-Dehydration in Vitro

1973 ◽  
Vol 61 (6) ◽  
pp. 375-379 ◽  
Author(s):  
Robert L. Anderson ◽  
Jean M. Cassidy ◽  
John R. Hansen ◽  
Wilbur Yellin
Keyword(s):  
Stratum Corneum ◽  
Human Stratum Corneum ◽  
Stratum Corneum Hydration

In vivo intra- and inter-individual variability study of human stratum corneum by confocal Raman spectroscopy

2016 ◽  
Vol 87 ◽  
pp. 199-206
Author(s):  
Laurita dos Santos ◽  
Joao Lucas Rangel ◽  
Vamshi Krishna Tippavajhala ◽  
Michely Glenda Pereira da Silva ◽  
Borys Mogilevych ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Stratum Corneum ◽  
Individual Variability ◽  
Confocal Raman Spectroscopy ◽  
Human Stratum Corneum ◽  
Confocal Raman ◽  
Variability Study

Characterization of molecular transport across human stratum corneum in vivo

2001 ◽  
Vol 20 (2-3) ◽  
pp. 279-301 ◽  
Author(s):  
Aarti Naik ◽  
Yogeshvar N. Kalia ◽  
Fabrice Pirot ◽  
Richard H. Guy
Keyword(s):  
Stratum Corneum ◽  
Molecular Transport ◽  
Human Stratum Corneum

Extraction and quantification of amino acids in human stratum corneum in vivo

2010 ◽  
Vol 163 (3) ◽  
pp. 458-465 ◽  
Author(s):  
J.-P. Sylvestre ◽  
C.C. Bouissou ◽  
R.H. Guy ◽  
M.B. Delgado-Charro
Keyword(s):  
Amino Acids ◽  
Stratum Corneum ◽  
Human Stratum Corneum

In vivo Change of Keratin-Bound Molecules in the Human Stratum Corneum following Exposure to Ultraviolet Radiation

2019 ◽  
Vol 32 (5) ◽  
pp. 254-264
Author(s):  
So Hyun Yoon ◽  
Jong Il Park ◽  
Ji Eun Lee ◽  
Cheol Hwan Myung ◽  
Jae Sung Hwang
Keyword(s):  
Ultraviolet Radiation ◽  
Stratum Corneum ◽  
Human Stratum Corneum
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