Results 141 to 150 of about 5,716,355 (164)
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Plant Gene, 2019
Abstract Scytonemin and mycosporine-like amino acids (MAAs) are important novel secondary metabolites synthesized by cyanobacteria to protect themselves from lethal ultraviolet (UV) radiation. Scytonemin, the extracellular polysaccharide sheath pigment is found in several cyanobacterial species and is a lipid-soluble dimeric pigment consisting of ...
Jainendra Pathak +2 more
exaly +2 more sources
Abstract Scytonemin and mycosporine-like amino acids (MAAs) are important novel secondary metabolites synthesized by cyanobacteria to protect themselves from lethal ultraviolet (UV) radiation. Scytonemin, the extracellular polysaccharide sheath pigment is found in several cyanobacterial species and is a lipid-soluble dimeric pigment consisting of ...
Jainendra Pathak +2 more
exaly +2 more sources
Comparative analysis of in vitro antioxidant capacities of mycosporine-like amino acids (MAAs)
Algal Research, 2018Abstract The most common Mycosporine-like Amino Acids (MAAs) in red algae (asterina-330, shinorine, palythine, palythinol, and porphyra-334) were evaluated regarding their in vitro antioxidant capacities, comparing them with synthetic (BHT and Trolox) and natural (ascorbic acid, gallic acid, p-cumaric acid, quercetin, and rutin) antioxidants.
Priscila Torres +2 more
exaly +2 more sources
Journal of Photochemistry and Photobiology B: Biology, 2006
Changes in mycosporine-like amino acids (MAAs) induced by the increase of photosynthetically active radiation (PAR) were studied in the toxic dinoflagellate Alexandrium tamarense. Cultures of A. tamarense were maintained at exponential growth under low (25 micromol quanta m(-2)s(-1)) PAR irradiance. The cultures were nutrient enriched and one day later
Alan I, Callone +3 more
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Changes in mycosporine-like amino acids (MAAs) induced by the increase of photosynthetically active radiation (PAR) were studied in the toxic dinoflagellate Alexandrium tamarense. Cultures of A. tamarense were maintained at exponential growth under low (25 micromol quanta m(-2)s(-1)) PAR irradiance. The cultures were nutrient enriched and one day later
Alan I, Callone +3 more
openaire +2 more sources
Mycosporine-like amino acid (MAAs) production by Heterocapasa sp. (Dinophyceae) in indoor cultures
Biomolecular Engineering, 2003The possibility of using mycosporine-like amino acids (MAAs), with an apparent sunscreen function in nature, as ultraviolet radiation (UVR) blockers to prevent skin injury has been raised by diverse authors. Production of MAAs by the dinoflagellate Heterocapsa sp. (Dinophyceae) is shown here. Three major peaks with absorption maxima at 330.8, 332.0 and
Montero, Olimpio, Lubián, Luis M.
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Mycosporine-like amino acids (MAAs)-producing Microcystis in Lake Erie
Harmful Algae, 2018Mycosporine-like amino acids (MAAs) are UV-absorbing metabolites found in cyanobacteria. While their protective role from UV in Microcystis has been studied in a laboratory setting, a full understanding of the ecology of MAA-producing versus non-MAA-producing Microcystis in natural environments is lacking. This study presents a new tool for quantifying
Hu, Chenlin +4 more
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Photochemical & Photobiological Sciences, 2014
Mycosporine-like amino acids (MAAs) are ecologically important biomolecules with great photoprotective potential. The present study aimed to investigate the biosynthesis of MAAs in the cyanobacterium Arthrospira sp. CU2556. High-performance liquid chromatography (HPLC) with photodiode-array detection studies revealed the presence of a UV-absorbing ...
Rajesh P, Rastogi, Aran, Incharoensakdi
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Mycosporine-like amino acids (MAAs) are ecologically important biomolecules with great photoprotective potential. The present study aimed to investigate the biosynthesis of MAAs in the cyanobacterium Arthrospira sp. CU2556. High-performance liquid chromatography (HPLC) with photodiode-array detection studies revealed the presence of a UV-absorbing ...
Rajesh P, Rastogi, Aran, Incharoensakdi
openaire +4 more sources
Journal of Photochemistry and Photobiology B: Biology, 2007
A database on UV-absorbing mycosporines and mycosporine-like amino acids (MAAs) has been constructed that provides information on various mycosporines and MAAs reported in fungi, cyanobacteria, macroalgae, phytoplankton and animals from aquatic and terrestrial habitats.
Rajeshwar P, Sinha +2 more
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A database on UV-absorbing mycosporines and mycosporine-like amino acids (MAAs) has been constructed that provides information on various mycosporines and MAAs reported in fungi, cyanobacteria, macroalgae, phytoplankton and animals from aquatic and terrestrial habitats.
Rajeshwar P, Sinha +2 more
openaire +2 more sources
Planta, 2008
The mycosporine-like amino acid (MAA) profile of a rice-field cyanobacterium, Anabaena doliolum, was studied under PAR and PAR + UVR conditions. The high-performance liquid chromatographic analysis of water-soluble compounds reveals the biosynthesis of three MAAs, mycosporine-glycine (lambda (max) = 310 nm), porphyra-334 (lambda (max) = 334 nm) and ...
Shailendra Pratap Singh +2 more
exaly +3 more sources
The mycosporine-like amino acid (MAA) profile of a rice-field cyanobacterium, Anabaena doliolum, was studied under PAR and PAR + UVR conditions. The high-performance liquid chromatographic analysis of water-soluble compounds reveals the biosynthesis of three MAAs, mycosporine-glycine (lambda (max) = 310 nm), porphyra-334 (lambda (max) = 334 nm) and ...
Shailendra Pratap Singh +2 more
exaly +3 more sources
Mycosporine-like amino acids (MAAs) protect against UV-B-induced damage in Gyrodinium dorsum Kofoid
Journal of Plant Physiology, 2001Summary The protective effect of mycosporine-like amino acids (MAAs) against ultraviolet-B (UV-B; 280-315 nm) radiation has been studied in the marine dinoflagellate Gyrodinium dorsum. Cultures were irradiated with artificial (simulated) solar radiation with 320-nm (UV-A + PAR) and 395-nm (PAR only) cut-off filters for a period of up to 48 h in order ...
Rajeshwar Sinha +2 more
exaly +2 more sources
Journal of Photochemistry and Photobiology B: Biology, 1999
Abstract An ultraviolet-absorbing mycosporine-like amino acid (MAA) has been detected in a filamentous and heterocystous cyanobacterium, Anabaena sp., isolated from a rice paddy field near Varanasi, India. The MAA is isolated and purified by high-performance liquid chromatography. Only one MAA is detected with a retention time of around 2.8 min and
Rajeshwar P Sinha +2 more
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Abstract An ultraviolet-absorbing mycosporine-like amino acid (MAA) has been detected in a filamentous and heterocystous cyanobacterium, Anabaena sp., isolated from a rice paddy field near Varanasi, India. The MAA is isolated and purified by high-performance liquid chromatography. Only one MAA is detected with a retention time of around 2.8 min and
Rajeshwar P Sinha +2 more
openaire +1 more source