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A Polyvinyl Alcohol-Tannic Acid Gel with Exceptional Mechanical Properties and Ultraviolet Resistance.
Gels
November 2022
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
Design and preparation of gels with excellent mechanical properties has garnered wide interest at present. In this paper, preparation of polyvinyl alcohol (PVA)-tannic acid (TA) gels with exceptional properties is documented. The crystallization zone and hydrogen bonding acted as physical crosslinkages fabricated by a combination of freeze-thaw treatment and a tannic acid compound.
View Article and Find Full Text PDFOral Supplementation with -Isomer-Rich Astaxanthin Inhibits Ultraviolet Light-Induced Skin Damage in Guinea Pigs.
Mar Drugs
June 2022
Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
Article Synopsis
- The study examined how different ratios of astaxanthin isomers affect skin damage from UV light in guinea pigs.
- Both all- and -isomer-rich astaxanthin diets were effective in reducing skin damage, but the -isomer-rich diet provided better protection.
- Results suggested that -isomers are more effective as oral sunscreen agents compared to the all--isomer, showing a higher skin protective ability and reducing pigmentation more significantly.
Rational design of dual-functional surfaces on polypropylene with antifouling and antibacterial performances a micropatterning strategy.
J Mater Chem B
May 2022
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
The hydrophobicity and inertness of the polypropylene (PP) material surface usually lead to serious biofouling and bacterial infections, which hamper its potential application as a biomedical polymer. Many strategies have been developed to improve its antifouling or antibacterial properties, yet designing a surface to achieve both antifouling and antibacterial performances simultaneously remains a challenge. Herein, we construct a dual-function micropatterned PP surface with antifouling and antibacterial properties through plasma activation, photomask technology and ultraviolet light-induced graft polymerization.
View Article and Find Full Text PDFMottled skin pigmentation and solar lentigines from chronic photodamage with aging involve complex interactions between keratinocytes and melanocytes. However, the precise signaling mechanisms that could serve as therapeutic targets are unclear. Herein, we report that expression of nuclear factor erythroid 2-related factor 2 (NRF2), which regulates reduction-oxidation reactions, is altered in solar lentigines and photodamaged skin.
View Article and Find Full Text PDFErythrosis interfollicularis colli and cutis rhomboidalis nuchae: two sides of a coin.
Acta Dermatovenerol Alp Pannonica Adriat
June 2019
Dresden Municipal Hospital, Dresden Academic Teaching Hospital, Dresden, Germany.
Introduction: Chronic exposure to sunlight accelerates extrinsic aging due to changes in the extracellular matrix. Cutis rhomboidalis nuchae and erythrosis interfollicularis colli are two benign skin disorders related to extrinsic aging.
Methods: The study investigated possible co-occurrence in 50 male patients that developed skin cancer due to professional outdoor work, and demonstrated cutis rhomboidalis nuchae clinically and by dermoscopy.
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