Results 191 to 200 of about 44,750 (259)

Novel Histopathologic Features of Diffuse Blue‐Gray Hyperpigmentation Associated With Kratom Use: A Case Report and Literature Review

Journal of Cutaneous Pathology, EarlyView.
ABSTRACT Background Drug‐induced hyperpigmentation accounts for 10%–20% of acquired pigmentary disorders and can be misdiagnosed for other causes such as melasma, post inflammatory changes, or heavy metal deposition. Kratom (Mitragyna speciosa), a Southeast Asian plant with an opioid‐like profile, has been increasingly used in the United States for ...
Rita Kamoua, Kristen Paradine, Craig A. Rohan, Mary McDaniel, Diane Perkins   +4 more
wiley   +1 more source

Manganese Porphyrin-Catalyzed One-Pot Oxidation of Lupeol: Efficient Conversion of Its Terminal Alkene Into Carboxylic Acids. [PDF]

Chem Biodivers
Oliveira LR, Fonseca-Pinheiro P, Duarte LP, Vidal DM, de Sousa GF, Martins DCDS.   +5 more
europepmc   +1 more source

Unraveling the active site cover of coproheme decarboxylase from Listeria monocytogenes

The FEBS Journal, EarlyView.
During heme biosynthesis in Gram‐positive bacteria, coproheme decarboxylase (ChdC) catalyzes the conversion of four‐propionate substrate coproheme to the two propionate product heme b. Its active site is universally covered by a flexible linking loop. This study identifies an important histidine residue, which stabilizes the loop in a ChdC homolog.
Nikolaus Falb, Dominik Hörtnagel, Chris Oostenbrink, Paul G. Furtmüller, Stefan Hofbauer   +4 more
wiley   +1 more source

Mimicking The Photosynthetic Special Pair With Aluminum(III) Porphyrin Homodimer - Fullerene (C₆₀) Supramolecular Assemblies Capable of Long-Lived Charge Separation. [PDF]

Chemistry
Charon S, Sharma JK, Zarrabi N, Ellis P, Karr PA, van der Est A, D'Souza F, Poddutoori PK.   +7 more
europepmc   +1 more source

Molecular dynamics simulations and fluorescence spectroscopy suggest reduced tryptophan‐to‐heme energy transfer facilitates lignin degradation in ClassII peroxidases

The FEBS Journal, EarlyView.
In lignin peroxidase and versatile peroxidase, low FRET from buried Trp to heme promotes long‐range electron transfer (LRET) from substrate to heme. This efficient electron flow is facilitated by reduced FRET competition. This mechanism likely evolved to enable the effective degradation of bulky, high‐redox‐potential lignin that cannot reach the enzyme'
Yi Ren, Dale Ang, Haluk Ertan, Anne Poljak, Janice R. Aldrich‐Wright, Wallace J. Bridge, Khawar Sohail Siddiqui   +6 more
wiley   +1 more source

Triarylphosphonium-conjugated Sn(iv)-porphyrins for antimicrobial photodynamic therapy: impact of substituents on lipophilicity, aggregation, and photoantibacterial activity. [PDF]

RSC Med Chem
Mp G, Muruganandam N, Govindarajan S, Babu B.   +3 more
europepmc   +1 more source

Aggregation-induced stabilization of pheophorbide, a water-soluble chlorophyll derivative. [PDF]

Front Nutr
Liu Y, Liu Y, Wang Y, Wang S, Shi S, Li F, Zeng M.   +6 more
europepmc   +1 more source

Effect of π-spacer moieties coupled to a porphyrin/PC70BM donor-acceptor for promising organic photovoltaic properties: a DFT study. [PDF]

RSC Adv
Iqbal MMA, Hussain F, Javeed H, Hassan T, Hussain R.   +4 more
europepmc   +1 more source

Porphyrin-Geländer-Helical Conjugated Banister Type Porphyrin Dyads. [PDF]

Chemistry
Keller JF, D'Addio A, Mayor M.
europepmc   +1 more source

Seaweed-Derived Extract Targets Porphyr'ageing to Modulate the Visible Signs of Aging in Human Skin. [PDF]

Mar Drugs
De Tollenaere M, Meunier M, Chapuis E, Bracq M, Jarrin C, Lemagnen P, Robe P, Lapierre L, Tiguemounine J, Zanchetta C, Humeau A, Préchoux A, Brebion J, Hennequart F, Benoit M, Scandolera A, Reynaud R.   +16 more
europepmc   +1 more source