Results 61 to 70 of about 44,072 (262)

Hyperbranched polyethylenimine bearing cyclodextrin moieties showing temperature and pH controlled dye release

Beilstein Journal of Organic Chemistry, 2011
The release of anthraquinone dyes from β-cyclodextrin modified, hyperbranched polyethylenimine (PEI-CD) was investigated. 5,8-Dichloro-1,4-dihydroxyanthraquinone (AQ-OH) was enclosed simply by ionic attraction between the phenolate groups of AQ-OH and ...
Indra Böhm, Susanne Katharina Kreth, Helmut Ritter   +2 more
doaj   +1 more source

Danthron, an Anthraquinone Isolated from a Marine Fungus, Is a New Inhibitor of Angiogenesis Exhibiting Interesting Antitumor and Antioxidant Properties

Antioxidants, 2023
The role played by a sustained angiogenesis in cancer and other diseases stimulates the interest in the search for new antiangiogenic drugs. In this manuscript, we provide evidence that 1,8- dihydroxy-9,10-anthraquinone (danthron), isolated from the ...
Isabel Vidal, José Antonio Torres-Vargas, José María Sánchez, Mónica Trigal, Melissa García-Caballero, Miguel Ángel Medina, Ana R. Quesada   +6 more
doaj   +1 more source

Synthetic dye decolorization by three sources of fungal laccase [PDF]

, 2012
Decolorization of six synthetic dyes using three sources of fungal laccase with the origin of Aspergillus oryzae, Trametes versicolor, and Paraconiothyrium variabile was investigated. Among them, the enzyme from P.
Aghaie-Khozani, M., Ameri, A., Faramarzi, M.A., Forootanfar, H., Mahmoudjanlou, Y., Moezzi, A., Niknejad, F.   +6 more
core   +2 more sources

Ga‐on‐In Substitution with Zn Vacancies in Zn3In2S6 Induces Electron–Hole Asymmetry and In─O Bond Weakening for Coupled Two‐Electron Oxygen Reduction and H2O2 Stabilization

Advanced Materials, EarlyView.
Ga‐on‐In substitution coupled with Zn vacancies in Zn3In2S6 creates a dopantdefect synergy that weakens InO bonding and induces electronhole asymmetry. The resulting spatial charge separation directs the two‐electron oxygen reduction pathway, enabling efficient artificial photosynthesis of H2O2 with a production rate of 187.8 µmol g−1 min−1 ...
Xiaowen Ruan, Chunsheng Ding, Dongxu Jiao, Jing Leng, Minghua Xu, Bonan Li, Zhipeng Yu, Xiaoqiang Cui, Jimmy C. Yu, Yongfa Zhu, Sai Kishore Ravi   +10 more
wiley   +1 more source

Comparative transcriptome analysis and identification of candidate R2R3-MYB genes involved in anthraquinone biosynthesis in Rheum palmatum L.

Chinese Medicine
Background Rheum palmatum L. has important medicinal value because it contains biologically active anthraquinones. However, the key genes and TFs involved in anthraquinone biosynthesis and regulation in R. palmatum remain unclear.
Xia Zhao, Feng Yan, Yi-min Li, Jing Tang, Xiao-chen Hu, Zhao Feng, Jing Gao, Liang Peng, Gang Zhang   +8 more
doaj   +1 more source

Cytotoxic Compounds from Aloe megalacantha

Molecules, 2017
Phytochemical investigation of the ethyl acetate extract of the roots of Aloe megalacantha led to the isolation of four new natural products—1,8-dimethoxynepodinol (1), aloesaponarin III (2), 10-O-methylchrysalodin (3) and methyl-26-O-feruloyl ...
Negera Abdissa, Sebastian Gohlke, Marcel Frese, Norbert Sewald   +3 more
doaj   +1 more source

Gate Controlled Molecular Switch Based on Picene/F4TCNQ Charge-Transfer Material

, 2014
We show that the recently synthesized charge-transfer material picene/F4TCNQ can be used as a gate-voltage controlled molecular switch. The picene/F4TCNQ system is compared with the extensive characterized anthraquinone-based molecular system, which is ...
Hahn, Torsten, Kortus, Jens, Liebing, Simon   +2 more
core   +1 more source

Inter‐Atomic Synergy on Single‐Atom Alloy Promotes Cyclohexanone Oxime Electrosynthesis

Advanced Materials, EarlyView.
Electrosynthesis of cyclohexanone oxime using renewable electricity offers a greener alternative to traditional energy‐intensive methods. Here, we develop a Fe1Bi single‐atom alloy that delivers 70.9% Faradaic efficiency and 0.94 mmol cm−2 h−1 yield rate through the atomic‐scale synergistic mechanism.
Panlong Zhai, Chen Wang, Guan Sheng, Chao Ye, Jungang Hou, Qinfen Gu, Tao Ling, Ye Zhu, Pei Liang, Xin Wang, Jieqiong Shan   +10 more
wiley   +1 more source

Biredox‐Ionic Anthraquinone‐Coupled Ethylviologen Composite Enables Reversible Multielectron Redox Chemistry for Li‐Organic Batteries

Advanced Science, 2022
Organic compounds bearing redox‐active ionic pairs as electrode materials for high‐performance rechargeable batteries have gained growing attention owing to the properties of synthetic tunability, high theoretical capacity, and low solubility. Herein, an
Zhongju Wang, Qianqian Fan, Wei Guo, Changchun Yang, Yongzhu Fu   +4 more
doaj   +1 more source

Preventive Effects of Anthraquinones Isolated from an Endophytic Fungus, Colletotrichum sp. JS-0367 in Tumor Necrosis Factor-α-Stimulated Damage of Human Dermal Fibroblasts

Antioxidants, 2021
Reactive oxygen species (ROS) are a major causative factor of inflammatory responses and extracellular matrix degradation. ROS also cause skin aging and diverse cutaneous lesions.
Sullim Lee, Quynh Nhu Nguyen, Hung Manh Phung, Sang Hee Shim, Daeyoung Kim, Gwi Seo Hwang, Ki Sung Kang   +6 more
doaj   +1 more source