Results 51 to 60 of about 12,819 (218)
The Inhibitory Effect of Phycocyanin Peptide on Pulmonary Fibrosis In Vitro
Marine Drugs, 2022 Phycocyanin is an excellent antioxidant with anti-inflammatory effects on which recent studies are growing; however, its specific target remains unclear.
Run-Ze Liu +6 more
doaj +1 more source
π‐Enlargement in Porphyrin Macrocycles at Interfaces
Angewandte Chemie International Edition, EarlyView.On‐surface synthesis of a 20‐π free‐base expanded porphyrin, by depositing onto a hot Ag(111) substrate an 18‐π free‐base precursor equipped with ‐CF3 functional groups ABSTRACT Porphyrins are essential heteroatomic macrocycles, fundamental to both biological systems and advanced technology.
Ana Barragán +11 more
wiley +1 more source
Surgical inflammation: a pathophysiological rainbow
Journal of Translational Medicine, 2009 Tetrapyrrole molecules are distributed in virtually all living organisms on Earth. In mammals, tetrapyrrole end products are closely linked to oxygen metabolism. Since increasingly complex trophic functional systems for using oxygen are considered in the
Aller María-Angeles +2 more
doaj +1 more source
Angewandte Chemie International Edition, EarlyView.A fully protein‐based hydrogel integrated two orthogonal photoreceptors to enable reversible manipulation of stiffness with red/far‐red light and irreversible gel‐sol transitions with green light. Unexpectedly, high‐intensity red light results in attenuated stiffening and dark‐adaptation, arising from increased crosslinking dynamics in the ...
Saskia Frank, Seraphine V. Wegner
wiley +1 more source
Lineare Tetrapyrrole in marinen Sedimenten [PDF]
, 2001 Ende der 80iger Jahre wurde zum ersten Mal über lineare Tetrapyrrole als Abbauprodukte des Chlorophylls in seneszenten Pflanzen berichtet. Da jährlich mehr als 10 9 t Chlorophyll katabolisiert werden, davon etwa 3/4 im wäßrigen Milieu, stellt sich die ...
Wallerstein-Zielasko, Petra
core
Mechanism of tetrapyrrole chain elongation catalyzed by PBGD. [PDF]
, 2014 The scheme shows the deamination of porphobilinogen (PBG) to methylene pyrrolenine (MePy), the nucleophilic attack by the B ring of dipyrromethane (DPM) on MePy forming an intermediate that undergoes deprotonation to form a tripyrrole moiety (P3M ...
Meenakshi Pradhan (531967) +3 more
core +1 more source
Crystal structure of 5-tert-butyl-10,15,20-triphenylporphyrin
Acta Crystallographica Section E: Crystallographic Communications, 2016 In the title free base porphyrin, C42H34N4, the neighbouring N...N distances in the center of the ring vary from 2.818 (8) to 2.998 (8) Å and the phenyl rings are tilted from the 24-atom mean plane at angles varying between 62.42 (2)–71.63 (2)°.
Keith J. Flanagan +3 more
doaj +1 more source
Natural Product Gene Clusters in the Filamentous Nostocales Cyanobacterium HT-58-2
Life, 2021 Cyanobacteria are known as rich repositories of natural products. One cyanobacterial-microbial consortium (isolate HT-58-2) is known to produce two fundamentally new classes of natural products: the tetrapyrrole pigments tolyporphins A–R, and the ...
Xiaohe Jin +2 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.DFT calculations on porphyrin, corrin, and corphin complexes of cobalt, rhodium, iron, manganese, or nickel, and QM/MM calculations on enzyme models, explore the factors controlling the availably of super‐reduced metal(I) states. True metal(I) states are seen in corrin only for cobalt, in corphin only for nickel, and not at all in porphyrin.
Radu‐Ioan Onija +3 more
wiley +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2015 The asymmetric unit of the title nickel(II) porphyrin, [Ni(C48H60N4O2)], contains one independent molecule. The average Ni—N bond length is 1.917 (13) Å.
Keith J. Flanagan +3 more
doaj +1 more source