Cigarette smoke was used to simulate a polluted environment and an experiment was performed to reveal how healthy and bleached hair are damaged by a polluted environment. The dry/wet combability, surface contact angle...Cigarette smoke was used to simulate a polluted environment and an experiment was performed to reveal how healthy and bleached hair are damaged by a polluted environment. The dry/wet combability, surface contact angle, tryptophan content, and cuticle morphology of the smoke-exposed hair were evaluated, and compared to unexposed virgin hair. The results showed that pollution exposure can cause significant chemical damage to hair. In particular, virgin hair exposure to pollution can cause damage to the hair cuticles(higher wet/dry combing), protein degradation, and a more hydrophilic hair surface.展开更多
Forward Masking Temporal audiotory resolution is the ability of the auditory system to resolve auditory signals in the time domain. Forward masking is a means of studying temporal resolution where one tone, the probe,...Forward Masking Temporal audiotory resolution is the ability of the auditory system to resolve auditory signals in the time domain. Forward masking is a means of studying temporal resolution where one tone, the probe, is masked by a preceding tone, the masker. Forward masking is展开更多
Hair coloring is widely used by women and men either to change their natural hair color or to delay the onset of gray hair. Oxidative dyes may damage the hair, since chemical and physical procedures are involved to al...Hair coloring is widely used by women and men either to change their natural hair color or to delay the onset of gray hair. Oxidative dyes may damage the hair, since chemical and physical procedures are involved to alter the structure hair and consequently, alterations in its mechanical and of surface properties. One benefit of hair conditioners is to prevent flyaway hair, make the hair “shine”, and protect the hair from further damage. In this research we analyzed the hair protective effect conditioner agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in hair care on Caucasian hair post treatment with hair dye. The hairs were submitted by quantifying protein loss. The samples were classified as: hair untreated (I);hair treated with a commercial oxidative ultra-blond hair dye (II);hair post treatment II and F1: Base hair care formulation (III), hair post treatment II and F2: Base hair care formulation containing 1.0% (w/w) Argania spinosa kernel oil (IV), hair post treatment II and F3: Base hair care formulation containing 1.0% (w/w) Theobroma grandiflorum seed butter (V) and hair post treatment II and F4: Base hair care formulation containing 0.5% (w/w) Argania spinosa kernel oil and 0.5% (w/w) Theobroma grandiflorum seed butter (VI). For the protein loss, the results were: IIA = IIIA > IB = IVB = VB = VIB. Results classified with different letters present statistically significant differents, for α = 5, p ≤ 0.05, n = 6. Based on the results, the incorporation of conditioners agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in base hair care formulation applied in Caucasian hair post treatment with hair dye decreased the damage caused to hair by the coloring process.展开更多
Objective To study effects of Adenovirus -mediated Hath1 expression in guinea pig cochlea at one month after exposure to intensive noise. Methods Normal hearing guinea pigs, weighing 250-300g, received exposure to 200...Objective To study effects of Adenovirus -mediated Hath1 expression in guinea pig cochlea at one month after exposure to intensive noise. Methods Normal hearing guinea pigs, weighing 250-300g, received exposure to 200 rounds of impulse noise at 170 dB sound pressure level (SPL). The virus vector was inoculated into the left cochlea 1 month after noise exposure. Animals were tested using ABR and prepared for morphological examinations includeing immunocytochemistry and SEM 4 weeks after vector inoculation. Results The adenovirus mediated report gene expressed in the damaged area. There were no significant differences between treated and control animal in ABR threshold and morphologic changes. No new hair cells appeared in the Hath1 treated animals. Conclusion Forced hath1 over-expression in the cochlea 1 month after noise exposure does not lead to appearance of new hair cells.展开更多
文摘Cigarette smoke was used to simulate a polluted environment and an experiment was performed to reveal how healthy and bleached hair are damaged by a polluted environment. The dry/wet combability, surface contact angle, tryptophan content, and cuticle morphology of the smoke-exposed hair were evaluated, and compared to unexposed virgin hair. The results showed that pollution exposure can cause significant chemical damage to hair. In particular, virgin hair exposure to pollution can cause damage to the hair cuticles(higher wet/dry combing), protein degradation, and a more hydrophilic hair surface.
文摘Forward Masking Temporal audiotory resolution is the ability of the auditory system to resolve auditory signals in the time domain. Forward masking is a means of studying temporal resolution where one tone, the probe, is masked by a preceding tone, the masker. Forward masking is
文摘Hair coloring is widely used by women and men either to change their natural hair color or to delay the onset of gray hair. Oxidative dyes may damage the hair, since chemical and physical procedures are involved to alter the structure hair and consequently, alterations in its mechanical and of surface properties. One benefit of hair conditioners is to prevent flyaway hair, make the hair “shine”, and protect the hair from further damage. In this research we analyzed the hair protective effect conditioner agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in hair care on Caucasian hair post treatment with hair dye. The hairs were submitted by quantifying protein loss. The samples were classified as: hair untreated (I);hair treated with a commercial oxidative ultra-blond hair dye (II);hair post treatment II and F1: Base hair care formulation (III), hair post treatment II and F2: Base hair care formulation containing 1.0% (w/w) Argania spinosa kernel oil (IV), hair post treatment II and F3: Base hair care formulation containing 1.0% (w/w) Theobroma grandiflorum seed butter (V) and hair post treatment II and F4: Base hair care formulation containing 0.5% (w/w) Argania spinosa kernel oil and 0.5% (w/w) Theobroma grandiflorum seed butter (VI). For the protein loss, the results were: IIA = IIIA > IB = IVB = VB = VIB. Results classified with different letters present statistically significant differents, for α = 5, p ≤ 0.05, n = 6. Based on the results, the incorporation of conditioners agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in base hair care formulation applied in Caucasian hair post treatment with hair dye decreased the damage caused to hair by the coloring process.
基金supported by a Natural ScienceFoundation of China (NSFC) grant (# 30571017) to SMYJoint Research Fund for Overseas Chinese Young Scholars by NSFC (# 30628030) to DH and SMYNIH grant R01 DC 004696 from the NIDCD to DH
文摘Objective To study effects of Adenovirus -mediated Hath1 expression in guinea pig cochlea at one month after exposure to intensive noise. Methods Normal hearing guinea pigs, weighing 250-300g, received exposure to 200 rounds of impulse noise at 170 dB sound pressure level (SPL). The virus vector was inoculated into the left cochlea 1 month after noise exposure. Animals were tested using ABR and prepared for morphological examinations includeing immunocytochemistry and SEM 4 weeks after vector inoculation. Results The adenovirus mediated report gene expressed in the damaged area. There were no significant differences between treated and control animal in ABR threshold and morphologic changes. No new hair cells appeared in the Hath1 treated animals. Conclusion Forced hath1 over-expression in the cochlea 1 month after noise exposure does not lead to appearance of new hair cells.
