In didemnid ascidians with cyanobacterial symbionts, the tunic has a specific peak absorbing ultraviolet radiation (UV-R) due to the presence of ultraviolet (UV)-absorbing compounds, which probably include mycosporine-like amino acids (MAAs). The UV-R absorbing tunic is supposed to protect the symbionts in the common cloacal cavity of the host colony. The histological distribution of UV-R absorption in the tunic was examined using a UV light microscope equipped with a digital camera, from which the low-pass filter of the UV-sensitive image sensor was removed. The cell peripheries of tunic bladder cells and cell-like objects were visualized with the trans-illumination of UV light, indicating UV-R absorption at that site. In contrast, tunic matrix and vacuolar content of tunic bladder cells appeared to lack of UV-R absorption, allowing damaging wavelengths to penetrate. Accordingly, UV-absorbing compounds are expected to be contained in the cytoplasmic matrix of tunic bladder cells and possibly other types of tunic cells.
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http://dx.doi.org/10.6620/ZS.2018.57-33 | DOI Listing |
Photochem Photobiol
June 2024
Food Toxicology Group, CSIR- Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh, India.
Antioxidants (Basel)
June 2021
Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan 45142, Saudi Arabia.
Cosmetics, commonly known as 'makeup' are products that can enhance the appearance of the human body. Cosmetic products include hair dyes, shampoos, skincare, sunscreens, kajal, and other makeup products. Cosmetics are generally applied throughout the face and over the neck region.
View Article and Find Full Text PDFZool Stud
June 2018
Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
In didemnid ascidians with cyanobacterial symbionts, the tunic has a specific peak absorbing ultraviolet radiation (UV-R) due to the presence of ultraviolet (UV)-absorbing compounds, which probably include mycosporine-like amino acids (MAAs). The UV-R absorbing tunic is supposed to protect the symbionts in the common cloacal cavity of the host colony. The histological distribution of UV-R absorption in the tunic was examined using a UV light microscope equipped with a digital camera, from which the low-pass filter of the UV-sensitive image sensor was removed.
View Article and Find Full Text PDFJ Photochem Photobiol B
August 2016
Photobiology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR - Indian Institute of Toxicology Research (CSIR-IITR), M.G. Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR - IITR, Lucknow 226001, India. Electronic address:
Phloxine B (PhB) is a most commonly used dye in cosmetic products throughout the world. It shows an absorption in visible and ultraviolet radiations. PhB was photodegraded within 4h of UV exposure.
View Article and Find Full Text PDFJ Photochem Photobiol B
March 2016
Photobiology Laboratory, System Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Post Box No. 80, M.G. Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research, CSIR-IITR Campus, Lucknow, Uttar Pradesh, India. Electronic address:
Rose Bengal (RB) is an anionic water-soluble xanthene dye, which used for many years to assess eye cornea and conjunctiva damage. RB showed strong absorption maxima (λmax) under visible light followed by UV-B and UV-A. RB under sunlight exposure showed a time-dependent photodegradation.
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