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  • 1
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Exaggerated test conditions were frequently used to investigate the cutaneous tolerance of detergent products in the past. As the sensitivity of newly designed biometric methods is steadily improving, the trend towards more realistic test conditions should be encouraged. A hand immersion test under laboratory-controlled usage conditions is presently described, fulfilling such principles. Panelists soaked their hands in 2 different hand dishwashing liquids, 2× daily for 10 min each (with successive in-solution/out-of-solution cycles) for 4 consecutive days. Products were at usual dilution for dishwashing liquids and were randomized between the dominant and non-dominant hands of panelists. Visual scoring of erythema and dryness developing on the whole hands (scoring scales including interdigital areas and joints) during the week did not allow discrimination between the 2 products. However the dominant hands were significantly more susceptible to alterations than the non-dominant hands, regardless of product attribution. In contrast, skin electrical measurements (Corneometer® CM800 and Skicon® 200) on the dorsum of the hands (muscle mass between thumb and index) and squamometry analysis of tape stripping (harvested from the same site) yielded significant differences between the 2 products. In conclusion, a hand immersion test under realistic conditions has been described, which discriminates between products when sensitive assessment methods are used to explore skin sites partially protected from daily-life skin aggressions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Skin research and technology 1 (1995), S. 0 
    ISSN: 1600-0846
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background/aims: Patch test procedures have been developed to compare the irritation potential of surfactant-based products. Skin changes due to product application are usually assessed visually by a trained evaluator using standard scoring scales or instrumentally. This study has been carried out to optimize the assessment of skin dryness in the Modified Soap Chamber Test both by visual scoring and Comeometer measurement, with transepidermal water loss as an additional measure.Methods: Products were applied, under occlusion, to the skin, for 2 successive periods of 24 and 21 h; skin reactions were evaluated 3 h after removal of each series of patches, and followed up to 7 days after patches had been removed.Results: Skin dryness progressively develops after patch removal, and reaches a maximum 3 to 5 days later. Capacitance measurements correlate the best with visual scoring of dryness when waiting 5 days after patch removal before assessment.Conclusions: Comeometer is an useful instrument to quantify observed dryness only when transepidermal water loss has recovered a value close to its baseline value. For both visual and instrumental assessments of skin dryness, waiting 3 to 5 days after patch removal in the Modified Soap Chamber Test will provide the most valuable results.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Skin research and technology 1 (1995), S. 0 
    ISSN: 1600-0846
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background/Aims: Mildness of skin cleansing products is often claimed although difficult to substantiate. Both the society and the producer share a common interest that cleansing products are safe in use and that valid methods are used for premarketing evaluation of new products. The object of the present study was to evaluate methodological aspects when three products were compared using two different test systems to characterize their irritant properties.Methods: A modified soap chamber test (M-SCT) and an iterative short-term patch test (IPT) were performed. Eight healthy female volunteers aged 18 to 55 selected as having responsive skin were studied. Colorimetry and measurement of transepider-mal water loss was employed. A soap, a synthetic detergent bar and a facial cleanser were studied with deionized water as a reference.Results: The IPT appeared more sensitive than the M-SCT for the detection and discrimination of irritation. The techniques allowed the ranking of the irritant properties of the products relative to water, which showed low values in both systems.Conclusion: Ranking of irritant properties of cleansing products was possible even in a limited number of individuals. Iterative short-term patch test was more sensitive than a modified soap chamber test.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Skin research and technology 5 (1999), S. 0 
    ISSN: 1600-0846
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Sensitive skin is a regular matter of complaint from consumers. Skin being physiologically and historically different on different body parts, this study aims at characterizing hand skin from a population of subjects complaining of sensitive hands.〈section xml:id="abs1-2"〉〈title type="main"〉Methods: Asurvey was performed on a panel of 150 women. One-third claimed to have “sensitive hands”. Their hand skin condition was compared to those claiming to have “non-sensitive hands” by means of a self-evaluation questionnaire, clinical examination (erythema, dryness), instrumental measurements (reflectance spectrometry, evaporimetry, skin surface capacitance and biomechanic properties measurements) and analysis of stratum corneum tape stripping. The two groups were also compared for their ability to perceive differences in the feel of consumer products on their hands.〈section xml:id="abs1-3"〉〈title type="main"〉Results:“Sensitive hands” subjects perceived their hands as being dry and irritated. Such subjective perceptions were confirmed by visual assessment of erythema, capacitance measurement and stratum corneum stripping analysis. There was no correlation between the perception of sensitive hands and the ability of better perceiving the feel on skin of everyday products.〈section xml:id="abs1-4"〉〈title type="main"〉Conclusion:Sensitive hands perception is a reality sustained by measurable skin condition changes. It merits to be further investigated and should be taken into account.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : Munksgaard International Publishers
    Skin research and technology 7 (2001), S. 0 
    ISSN: 1600-0846
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background/aims: Skin compatibility of detergent products is usually evaluated using predictive tests where products are applied on the back or the forearm of the volunteers, even if those products come more readily into contact with consumers’ hands. The current study aimed at comparing the skin responsiveness of hands and volar and dorsal forearms to a surfactant solution.Method: Volunteers soaked simultaneously their forearms and hands in a solution of anionic surfactants, at 40 °C for 20 min, thrice a day and for 2 consecutive days. Skin condition on the hands, and the volar and dorsal forearms was evaluated by clinical examination and instrumental measurements.Results: Significant differences were observed at baseline for various skin parameters, especially those related to skin dryness. After repetitive contacts with the surfactant solution, a parallel evolution of most skin parameters was observed – i.e., an absence of change in instrumentally measured erythema and transepidermal water loss, a similar decrease in corneometry values, and a similar increase in staining of the stratum corneum strippings and in clinical dryness. However, an opposite effect of the soakings on the cohesiveness between corneocytes harvested by tape strippings from hand and forearm was observed.Conclusion: For most parameters, skin responsiveness to surfactants appears to be quite similar on the hands and forearms. It is inferred that forearms can be conveniently used to predict interaction of surfactants with hands.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 122 (1990), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The administration of Factor XIII (FXIII) produces a beneficial effect on the skin lesions in about 50% of the treated patients with progressive systemic sclerosis (PSS). The effect of FXIII on various skin fibroblast functions (proliferation, attachment, biosynthetic activity and mechanical properties) was investigated in vitro using normal and PSS strains. In cell culture, most of the PSS fibroblast strains synthesized excessive amounts of collagen. Other cell functions such as adhesion to collagen I or III, to fibronectin, retraction of collagen lattices, proliferation in low serum concentration and degradation of newly synthesized collagen were not significantly different. The addition of FXIII (i U/ml) inhibited the synthesis of collagen by normal fibroblasts and reduced it in PSS fibroblasts to a level similar to that of normal fibroblasts. This effect was observed for cells cultured on plastic or in a collagen lattice. In the latter, an increased amount of collagen degradation was observed. No significant effect of FXIII on the other cell functions was noted. Excessive collagen production by PSS fibroblasts can be repressed by FXIII in vitro by at least two distinct mechanisms: a reduction of collagen synthesis and an increased degradation of the newly synthesized collagen.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Experimental Cell Research 163 (1986), S. 294-300 
    ISSN: 0014-4827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 119 (1984), S. 744-750 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 119 (1984), S. 744-750 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 122 (1984), S. 137-142 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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