Results 41 to 50 of about 3,953 (191)
Pteridines, 1995 Unconjugated pteridines are present in fungi, algae and plants. However, the functions of pteridines in these organisms are not thoroughly investigated. The biosynthesis follows the same steps as were shown for animals and eubacteria.
Maier Josef +2 more
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Influence of Neopterin on Ciliary Beat Frequency of Human Nasal Epithelial Cells in vitro
Pteridines, 2008 Acute infectious diseases of the respiratory tract are regularly associated with increased concentrations of neopterin in serum and/or urine. Most likely, the pteridine compound is not only a marker of an activated cellular immune system but may exert ...
Neher Andreas +5 more
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Chemosensors, 2023 Pteridines are a group of compounds synthesised by many living organisms that are involved in the metabolism of many cofactors and vitamins. Their concentration in biological fluids may be altered by various pathologies such as cancer or inflammatory ...
Claudia Giménez-Campillo +7 more
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Pteridines in the Assessment of Neoplasia [PDF]
cclm, 1982 Biological processes which might explain the association of pteridine excretion with proliferation are still unknown. Difficulties in the analysis and the determination of naturally occurring pteridines are described. The best quantitative estimations were achieved when measurement of non-reduced forms was attempted.
HAUSEN, A., Wachter, H.
openaire +2 more sources
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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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, 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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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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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