Results 41 to 50 of about 143,165 (330)

Synthesis of isopropyl-substituted anthraquinones via Friedel–Crafts acylations: migration of isopropyl groups [PDF]

Royal Society Open Science, 2017
Friedel–Crafts reactions of isopropyl-substituted benzenes with phthalic anhydride in the presence of aluminium trichloride, followed by cyclization of the products with strong sulfuric acid give, as expected, anthraquinones.
Abdel B. Chakiri, Philip Hodge
doaj   +1 more source

A New Kind of Quinonic-Antibiotic Useful Against Multidrug-Resistant S. aureus and E. faecium Infections [PDF]

, 2018
Indexación: Scopus.A rapid emergence of resistant bacteria is occurring worldwide, endangering the efficacy of antibiotics and reducing the therapeutic arsenal available for treatment of infectious diseases. In the present study, we developed a new class
Alarcón, P., Andrades-Lagos, J., Bollo Dragnic, S., Campanini-Salinas, J., Choquesillo-Lazarte, D., Faúndez, M., Gonzalez Rocha, G., Kogan, M., Mella, J., Recabarren Gajardo, G., Salas-Huenuleo, E., Silva, F., Vidal, R., Vásquez-Velásquez, D.   +13 more
core   +1 more source

Tamoxifen-like metallocifens target thioredoxin system determining mitochondrial impairment leading to apoptosis in Jurkat cells [PDF]

, 2017
Tamoxifen-like metallocifens (TLMs) of the group-8 metals (Fe, Ru, and Os) show strong anti-proliferative activity on cancer cell lines resistant to apoptosis, owing to their unique redox properties. In contrast, the thioredoxin system, which is involved
Alberto Bindoli, Alessandra Folda, Anne Vessières, Gérard Jaouen, Hui Zhi Shirley Lee, Maria Pia Rigobello, Michèle Salmain, Pascal Pigeon, Siden Top, Valeria Scalcon   +9 more
core   +2 more sources

Comparison of calculated and experimental isotope edited FTIR difference spectra for purple bacterial photosynthetic reaction centers with different quinones incorporated into the QA binding site.

Frontiers in Plant Science, 2013
Previously we have shown that ONIOM type (QM/MM) calculations can be used to simulate isotope edited FTIR difference spectra for neutral ubiquinone in the QA binding site in Rhodobacter sphaeroides photosynthetic reaction centers.
Nan eZhao, Hari P Lamichanne, Gary eHastings   +2 more
doaj   +1 more source

Generation of superoxide and singlet oxygen from α-tocopherolquinone and analogues. [PDF]

, 2007
Three potential routes to generation of reactive oxygen species from a tocopherolquinone have been identified. The quinone of the water-soluble vitamin E analogue Trolox C (Trol-Q) is reduced by hydrated electron and isopropanol a hydroxyalkyl radical ...
Bisby, RH, Crisostomo, AG, Moreno, RB, Navaratnam, S, Wilkinson, JA   +4 more
core   +1 more source

Poly(1,4‐anthraquinone) as an Organic Electrode Material: Interplay of the Electronic and Structural Properties due to the Unusual Lone‐Pair‐π Conjugation

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
In this study, the unique role of the unusual lone‐pair‐π conjugation mechanism in poly(1,4‐anthraquinone) (P14AQ) is explored as an organic electrode material. Unlike traditional π‐π interactions, P14AQ's conjugation involves lone pairs of oxygen atoms interacting with the π cloud of adjacent units, enabling stable charge transport even with minimal π‐
Xiaotong Zhang, Piotr de Silva
wiley   +1 more source

The Old Yellow Enzyme OfrA Fosters Staphylococcus aureus Survival via Affecting Thiol-Dependent Redox Homeostasis

Frontiers in Microbiology, 2022
Old yellow enzymes (OYEs) are widely found in the bacterial, fungal, and plant kingdoms but absent in humans and have been used as biocatalysts for decades.
Eslam S. Ibrahim, Eslam S. Ibrahim, Knut Ohlsen   +2 more
doaj   +1 more source

Pyrroloquinoline quinone increases the expression and activity of Sirt1 and -3 genes in HepG2 cells. [PDF]

, 2015
Sirtuin (Sirt) 1 and Sirt 3 are nicotinamide adenine dinucleotide ((+))-dependent protein deacetylases that are important to a number of mitochondrial-related functions; thus, identification of sirtuin activators is important. Herein, we hypothesize that
Arguelles, Andrix, Bedi, Yudhishtar Singh, Chau, Jason, Choudhury, Mahua, Meruvu, Sunitha, Rucker, Robert, Zhang, Jian   +6 more
core   +1 more source

Deciphering the Origin of Higher Shell Coordination on Single Iron Catalysts for Resilient Modulating Persulfate Oxidation Into Singlet Oxygen Pathway

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
This study reveals that higher shell S coordination can effectively modulate the spin state of FeN4 site via long‐range electronic interactions, giving rise to the oriented generation of singlet oxygen from peroxymonosulfate activation. Abstract Precise manipulation of coordination structure of single‐atom sites and establishment of schematic ...
Liang Zhang, Kai Cheng, Zhizhi Yang, Ye Zhang, Shiro Kubuki, Paul A. Bingham, Yang‐Chun Yong, Bofan Zhang, Xiaoguang Duan   +8 more
wiley   +1 more source

Stable Radical Polymers as New Electroactive Materials: Synthesis, Properties, and Emerging Applications

Advanced Functional Materials, EarlyView.
This review covers the recent advances in the synthesis and properties of stable radical polymers (SRPs) and presents their applications in electronics, magnetics, optoelectronics, and biomedicines. The review concludes with a discussion of the challenges in radical chemistry and functionalization, while shedding light on the groundbreaking potential ...
Yufeng Xiong, Yingjiang Li, Xinfang Cui, Shiwei Li, Xiangdong Peng, Yanyun Ju, Tong Zhou, Rui Feng, Yang Zhang, Zehong Wang, Qing Wang, Lijie Dong   +11 more
wiley   +1 more source