Results 71 to 80 of about 5,912 (161)

Electronic Charge Density and Electrostatic Potential of Pterin, 7,8-Dihydropterin and 5,6,7,8-Tetrahydropterin - an Ab initio Quantum Chemical Study

open access: yesPteridines, 1998
Ab initio quantum chemical computations at the Hartree-Fock 6-31g** level of theory were performed on pterin, 7,8-dihydropterin and 5,6,7,8 -tetrahydropterin.
Reibnegger Gilbert   +3 more
doaj   +1 more source

Chemical Profiling and In Vitro Assessment of Antioxidant and Antimicrobial Properties of Algerian Erica arborea L. Extracts, Strengthened by Molecular Modeling Analysis

open access: yesChemistryOpen, Volume 15, Issue 8, August 2026.
Erica arborea L. from Algeria was valorized via chemical profiling and bioactivity assessment. The EtOAc extract showed the highest levels of polyphenols, flavonoids, and flavonols. It exhibited strong antioxidant (ABTS•+, DPPH•, FRAP) and antibacterial activity (S. aureus, B. subtilis).
Amina Bramki   +8 more
wiley   +1 more source

Testing for the Presence of Photobionts in Eucypris virens (Crustacea: Ostracoda) Green Valves

open access: yesFreshwater Biology, Volume 71, Issue 8, August 2026.
ABSTRACT Crustaceans exhibit a wide range of organic pigments with different colorations and functions. However, little is known about the origin and function of the characteristic green pigmentation that podocopid ostracods, and in particular Eucypris virens, exhibit in their valves.
Julio Cruz‐Vila   +7 more
wiley   +1 more source

Reconfiguring biofortification strategies to transform food systems and address micronutrient deficiency of the 21st century

open access: yesJournal of Integrative Plant Biology, Volume 68, Issue 8, Page 2511-2547, August 2026.
This review explores how to make staple foods and horticultural crops more nutritious, including how artificial intelligence‐based screening of gene banks helps deploy nutritionally rich germplasm into breeding. Genome editing can help develop crops richer in minerals, vitamins, and health‐promoting compounds, supporting healthier diets and more ...
Rhowell Jr. N. Tiozon   +2 more
wiley   +1 more source

Anticancer Photodynamic and Non-photodynamic Effects of Pterin Derivatives on a Pancreatic Cancer Cell Line

open access: yesJournal of Pharmacological Sciences, 2008
To evaluate the feasibility of two kinds of pterin derivatives, 2-(N,N-dimethylaminomethyleneamino)-6-formyl-3-pivaloylpteridin-4-one (DFP) and 2-(N,N-dimethylaminomethyleneamino)-3-pivaloylpteridin-4-one (DP), as anticancer drugs, their photodynamic and
Takashi Miyoshi   +6 more
doaj   +1 more source

Copper Ion Complexes with Derivatized Chelating Pterin Ligands

open access: yes, 2016
Pterin−copper ion interactions are of interest for possible modeling of enzyme active site chemistry or in coupling reactions of a redox-active metal ion with a redox-active ligand cofactor, Here, we describe the synthesis of derivatized chelating ...
Dong-Heon Lee (2261761)   +4 more
core   +1 more source

Pterin Metabolism In Haemodialysis Patients

open access: yesPteridines, 1989
Patients undertaking maintenance haemodialysis may develop a variety of neurological disorders, the most serious of which is aluminium induced encephalopathy.
Altmann Paul   +5 more
doaj   +1 more source

Crystal structure of (2-amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(1,10-phenanthroline-κ2N,N′)zinc trihydrate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, [Zn(C8H5N5O3)(C12H8N2)(H2O)]·3H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate ligand, a bidentate ancillary 1,10-phenanthroline (phen) ligand and a water molecule complete a distorted octahedral coordination ...
Siddhartha S. Baisya   +2 more
doaj   +1 more source

Electronic relaxation pathways of the biologically relevant pterin chromophore

open access: yes, 2017
Femtosecond-to-microsecond transient absorption spectroscopy is used to report the ultrafast relaxation mechanism of 2-amino-1H-pteridin-4-one (pterin) for the first time.
C. E. Crespo-Hernández   +3 more
core   +1 more source

New Ways of Synthesizing Potential Pterin Anti-Fungal Drugs [PDF]

open access: yes, 2021
Pterin based compounds have shown some promise as potential anti-fungal compounds; however, the low solubility of them in most organic solvents make the synthesis of these compounds tedious and difficult.
Toman, Charlie   +3 more
core  

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