Results 51 to 60 of about 3,589 (204)

Photo-reduction of Pteridines [PDF]

Nature, 1956
WHEN a solution of 7-hydroxypteridine1 was spotted on a sheet of Whatman No. 1 filter paper, irradiated with ultra-violet light (principally 254 mµ) for 5 min., and developed (by ascending chromatography) in various solvents, two spots appeared. One of these was identical with the starting material (unirradiated material was used as a control on the ...
openaire   +2 more sources

Safety and efficacy of a feed additive consisting of riboflavin 80% (vitamin B2) produced with Saccharomyces cerevisiae ATCC SD‐8628 for all animal species (Amyris Inc)

EFSA Journal, Volume 24, Issue 5, May 2026.
Abstract Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) of EFSA was asked to deliver a scientific opinion on the safety and efficacy of riboflavin 80% (vitamin B2) produced by Saccharomyces cerevisiae ATCC SD‐8628 as a nutritional feed additive for all animal species. The
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Roberto Edoardo Villa, Giovanna Azimonti, Eleftherios Bonos, Henrik Christensen, Mojca Durjava, Birgit Dusemund, Ronette Gehring, Boet Glandorf, Maryline Kouba, Marta López‐Alonso, Francesca Marcon, Giovanna Martelli, Carlo Nebbia, Alena Pechová, Miguel Prieto‐Maradona, Katerina Theodoridou, Andrey Yurkov, Baltasar Mayo, Rosella Brozzi, Jaume Galobart, Elisa Pettenati, Maria Vittoria Vettori, Fabiola Pizzo   +23 more
wiley   +1 more source

Electronic Structure of Tetrahydropteridine Derivatives

Pteridines, 1999
Recently; the 4-amino analogue of tetrahydrobiopterin was found to be a strong inhibitor of nitric oxide synthase while being bound to the enzyme in a manner similar to the natural cofactor tetrahydrobiopterin.
Reibnegger Gilbert, Pauschenwein Jutta, Werner Ernst R.   +2 more
doaj   +1 more source

Alternative cancer therapy through modeling pteridines photosensitizer quantum yield singlet oxygen production using swarm-based support vector regression and extreme learning machine

Cogent Engineering
Photodynamic cancer therapy circumvents the major side effects associated with the conventional cancer treatment methods, such as chemotherapy, surgery and exposure to radiation.
Nahier Aldhafferi
doaj   +1 more source

Theoretical study on the relative energies of cationic pterin tautomers

Pteridines, 2015
Pterins are heterocyclic molecules of biological importance that contain several basic sites. These molecules can be protonated in aqueous solution resulting in a wide variety of structures that differ in their site of protonation and tautomeric form. In
Nekkanti Sindhura, Martin Christopher B.
doaj   +1 more source

Release of Neopterin, PMN Elastase and Terminal Complement Complexes by Orthotopic Liver Transplantation with and without the Use of Veno-venous Bypass

Pteridines, 1998
Aim: The aim of the study was to determine whether orthotopic liver transplantation leads to the activation of macrophages, neutrophils and complement.
Tomasdottir H., Rønholm E., Bengtson JP, Bengtsson A.   +3 more
doaj   +1 more source

Ethnic Bridging of Sepiapterin in Chinese and Korean Populations Based on Predictions From Genetic Polymorphism of Breast Cancer Resistance Protein

Clinical and Translational Science, Volume 19, Issue 4, April 2026.
ABSTRACT Ethnic differences are crucial when considering the efficacy, safety, and dose of pharmaceuticals across diverse populations. The International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use (ICH) guideline E5 addresses the acceptability of extrapolating foreign clinical data taking ethnic factors into ...
Lan Gao, Neil Smith, Ronald Kong
wiley   +1 more source

Soluble Fas ligand and neopterin in patients with systemic and cutaneous discoid lupus erythematosus

Pteridines, 2000
Evidence accumulates suggesting that the pathogenesis in systemic lupus erythematosus (SLE) is associated with modulations in the Fas/FasL system. Serum concentrations of soluble Fas ligand (sFasL) were found to be elevated in patients with SLE.
Wirleitner Barbara, Kowald Elisabeth, Widner Bernhard, Ortner Ulrike, Baier-Bitterlich Gabriele, Sepp Norbert, Fuchs Dietmar   +6 more
doaj   +1 more source

Role of Weak Molecular Interactions in the Mechanism of Action of a Series of Antihelmintics

Molecules, 2000
Different physicochemical properties such as solute-solute and solute-solvent interactions, tautomerism, lipophilicity and solubility in water were determined for a serie of 6,7-diaryl-pteridines in order to relate those properties with their nematocide ...
Marisa Santo, Liliana Giacomelli, Mario Reta, Rosa Cattana, Antonio Chana, Juana Silber, Carmen Ochoa, Mercedes Rodriguez   +7 more
doaj   +1 more source

A Simple Method for RNA‐Seq of Manually Isolated Chromatophores in Oryzias Fishes

Development, Growth &Differentiation, Volume 68, Issue 3, April 2026.
ABSTRACT RNA sequencing (RNA‐seq) has become an essential tool for analyzing gene expression and exploring cell type–specific transcriptomes. However, sample preparation and quality control remain challenging, as current approaches typically rely on dissecting tissues containing mixed cell populations or using flow cytometry to isolate fluorescently ...
Makoto Goda, Asuka Miyagi, Keisuke Sugiwaka, Masakatsu Watanabe, Manabu Bessho‐Uehara, Masahiko Hibi, Atsushi Toyoda, Rieko Tanaka, Kawilarang W. A. Masengi, Kazunori Yamahira, Satoshi Ansai, Hisashi Hashimoto   +11 more
wiley   +1 more source