Results 41 to 50 of about 9,956 (243)

First Synthesis of Asperopterin A, an Isoxanthopterin Glycoside from Aspergillus Oryzae [PDF]

, 2013
The key precursor, N-2-(N,N -dimethylaminomethylene)-6-hydroxymethyl-8-methyl-3-[2-(4-nitrophenyl)ethyl]-7-xanthopterin (16) was efficiently prepared from 2,5-diamino-6-methylamino-3H-pyrimidin-4-one (5) and ethyl 3-(tert-butyldimethylsilyloxy)-2 ...
Hanaya, Tadashi, Yamamoto, Hiroshi
core   +1 more source

Microbial profile of the appendix niche in acute appendicitis: a novel sampling approach

FEBS Open Bio, Volume 15, Issue 12, Page 2001-2020, December 2025.
This study utilized a novel sampling method, ERAT (i.e. endoscopic retrograde appendicitis treatment)‐guided lumen aspiration, to obtain samples from the appendix, and shotgun metagenomic sequencing was performed for in situ characterization of the appendix microbiome in patients with acute appendicitis.
Huimin Ma, Mingfei Wang, Yanhu Feng, Wanqi Zhang, Wenbo Wang, Yanfeng Xie, Guixiang Kong, Jie Feng, Pengfei Wang, Qi Wang, Xiaojun Huang   +10 more
wiley   +1 more source

Series of Microporous Redox‐Active Pillared Metal–Organic Frameworks Based On Alloxazine Ligands

ChemistryOpen, Volume 14, Issue 12, December 2025.
Two series of robust pillared metal–organic frameworks using a redoactive ligand based on alloxazine and transition metals have been evidenced by XRD. The compounds have high decomposition temperatures, and their sorption properties are measured, revealing relatively low surface areas and a moderate uptake of CO2 and C2H4 at high pressures.
Jaison Casas, Alexios I. Vicatos, Leonard J. Barbour, Nathalie Kyritsakas, Abdelaziz Jouaiti, Sylvie Ferlay   +5 more
wiley   +1 more source

Prospects for the use of sulfur-containing pteridines in toxic liver damage

Regulatory Mechanisms in Biosystems
The presented material describes the results of the purposeful search for the novel hepatoprotective agents among synthetic sulfur-containing pteridines. The studied compounds were obtained using previously described synthetic procedures.
N. Lohvinenko, V. Shvets, G. Berest, I. Nosulenko, O. Voskoboinik, H. Severina, S. Okovytyy, S. Kovalenko   +7 more
doaj   +1 more source

Individual identification of bony fishes using unique body markings: Implications and applications

Journal of Fish Biology, Volume 107, Issue 6, Page 1852-1867, December 2025.
Abstract The natural variation in animal body markings, such as spots, stripes and blotches, offers a powerful tool for researchers, conservationists, citizen scientists and resource managers to distinguish specific individuals within species. By building libraries of photo‐identified individuals, we can track and differentiate individuals over time ...
Katie Dunkley, Samuel R. Matchette, Cheuk Yu Hau, Christian Drerup, Roxanne B. Holmes, Yvonne Sadovy de Mitcheson, James E. Herbert‐Read   +6 more
wiley   +1 more source

A Twenty Year Association with Pteridines - Chemistry, Biochemistry and Molecular Biology

Pteridines, 1998
The author has summarised the science in his published works which contained chemistry. biochemistry and molecular biology related to pteridines as a dedication to Professor Wolfgang Pfleiderer on the occasion of his seventieth birthday.
Armarego Wilfred L. F.
doaj   +1 more source

Applications of QSPR and Machine Learning in Molecular Photonics

Advanced Optical Materials, Volume 13, Issue 33, November 25, 2025.
Quantitative structureproperty relationships (QSPR) and machine learning (ML) are transforming photochemistry by enabling pre‐synthetic screening of photoactive molecules. This review outlines advances in data‐driven discovery of optical materials and functional dyes, identifies effective descriptors and models for photophysical processes, and provides
Andrey A. Buglak, Platon P. Chebotaev, Mikhail A. Filatov   +2 more
wiley   +1 more source

Evaluation of Serum and Urinary Levels of some Pteridine Pathway Components in Healthy Turkish Children

Pteridines, 2012
Neopterin, as a non-conjugated pteridine, is synthesized from guanosine triphosphate and its production is upregulated upon the activation of cellular immune response.
Girgin Gözde, Baydar Terken, Fuchs Dietmar, Sahin Gönül, Özmert Elif, Yurdakök Kadriye   +5 more
doaj   +1 more source

An Allele of Glutamate Formiminotransferase Triggers 5‐Methyl‐Tetrahydrofolate‐to‐MeFox Conversion and Facilitates Folate Biofortification in Maize

Advanced Science, Volume 12, Issue 42, November 13, 2025.
This work demonstrates the distinct roles of the glutamate formiminotransferase (GFT) enzyme in plants. The GFT triggers the conversion of 5‐methyl‐tetrahydrofolate to MeFox in plants, a process distinct from its role as a formiminotransferase in mammals.
Tong Lian, Wenzhu Guo, Yanjing Wang, Weiwei Wen, Weixuan Wang, Ling Jiang, Qiuju Liang, Ji'an Liu, Haijun Liu, Yuan Xue, Lixu Pan, Qiaoquan Liu, Ping Yin, Delin Zhang, Jianbing Yan, Chunyi Zhang   +15 more
wiley   +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