Results 31 to 40 of about 3,589 (204)
Pteridines and Lipid Metabolism
Pteridines, 1998 The effect of 9 different pteridines on fatty acid incorporation into phospholipids as well as on cholesterol and phospholipid content was compared in vitro using rat liver homogenate, Krebs-Ringer phosphate buffer containing 0.3 % albumin (pH=7.4 ...
Rudzite Vera +5 more
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Control Strategies in Guanine Biocrystallization
Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.Biological guanine crystals produce spectacular photonic phenomena in animals and hold great promise as new, sustainable optical materials. We review how organisms precisely control the structure, morphologies, and resulting optical properties of these crystals using a set of ingenious ‘design’ strategies, including control of pH, template‐directed ...
Shashanka S. Indri +2 more
wiley +2 more sources
Pteridines, 1991 The electronic absorption. fluorescence excitation, and fluorescence emission spectra of a series of pteridines (lumazine, xanthopterin, isoxanthopterin, biopterin) and riboflavin (vitamin B2) were measured at room temperature (298 K) in a number of ...
Aaron J.-J. +8 more
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Pteridines, XCVI. Synthesis and Reactions of 6-(1,2,3-Trihydroxypropyl)pteridines
Pteridines, 1990 Various hydropyrano [3.2-g] pteridines (7, 10, 12, 21 , 33) were oxidized to the corresponding 6-(1,2,3- trihydroxypropyl)pteridine derivatives (8,9, 11, 13,32, 34), which are valuable intermediates for the synthesis of new 6-substituted pteridines (15 -
Soyka Rainer, Pfleiderer Wolfgang
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Color and Near‐Infrared Reflectance Covary in Distinct Ways Across Taxa [PDF]
Ecol EvolSolar reflectance across ultraviolet, visible, and near‐infrared wavelengths was analyzed in integuments and eggs of 322 species. We found consistent positive correlations between UV and visible reflectance, while visible‐NIR associations varied across taxa, with differences in baseline reflectance suggesting structural or compositional influences ...
Goldenberg J +13 more
europepmc +2 more sources
A traceless solid-phase synthesis of pteridines
, 2003 The linking of pyrimidines to polystyrene supports via either a 2- or 4-thioether provides access to pteridines through solid-phase synthesis. Oxidative cleavage (dimethyldioxirane) followed by nucleophilic substitution by amines, azide, or water ...
La Rosa, S. +2 more
core +1 more source
Pteridine levels and head weights are correlated with age and colony task in the honey bee, Apis mellifera [PDF]
PeerJ, 2016 Background. The age of an insect strongly influences many aspects of behavior and reproduction. The interaction of age and behavior is epitomized in the temporal polyethism of honey bees in which young adult bees perform nurse and maintenance duties ...
Frank D. Rinkevich +4 more
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Integrative Zoology, EarlyView.We demonstrate that red male Podarcis muralis exhibit higher evaporative water loss compared to other morphs, indicating a physiological strategy that prioritizes hydroregulation over fine thermoregulation. This suggests red morphs are adapted to cooler, wetter niches, while white and yellow morphs possess superior water conservation mechanisms to ...
Roberto Sacchi +10 more
wiley +1 more source
International Journal of Dermatology, EarlyView.Conventional dermoscopy provided higher scores than ultraviolet‐induced fluorescence dermoscopy for parallel furrow pattern, parallel ridge pattern (PRP), fibrillar pattern, dots/clods, radial lines, blue–white structureless areas and blotch, and outperformed sub‐ultraviolet reflectance dermoscopy (sUVRD) for PRP and blue–white structureless areas ...
Handan Merve Erol Mart +3 more
wiley +1 more source
Pteridines, 1993 In order to carry out a genetic and biochemical analysis of pteridin pathway eye colour loci, sixteen strains of five eye colour mutants of Drosophila melanogaster (2 dke, 7 sf. 3 se, 3 Hnr and 1 bw) from natural populations were used.
Millán J.M., Nájera C.
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