Results 101 to 110 of about 44,072 (262)

New Anthraquinones and Anthraquinone Glycosides from Morinda lucida

Zeitschrift für Naturforschung B, 1981
Abstract From the trank heartwood of Morinda lucida four new anthraquinones, 3-hydroxy-anthraquinone-2-carbaldehyde, morindone-5-methyl ether, munjistin methyl ester, damna-canthol-ѡ-methyl ether and two glycosides, soranjidiol 6-0-β-primveroside and lucidin 3-0-β-primveroside were isolated and identified by spectroscopic and chemical ...
George P. Demagos, Wolfgang Baltus, Gerhard Höfle   +2 more
openaire   +1 more source

Regulating Interfacial Hydrogen‐Bonding Connectivity by Oxygen Vacancies‐Driven [Fe(CN)6]3− Coordination for Boosting Hydrogen Peroxide Electrosynthesis

Carbon Energy, EarlyView.
ABSTRACT The inherent hydroxide‐rich (OH⁻) environment in alkaline media facilitates the two‐electron oxygen reduction reaction (2e−ORR). However, the strong interaction between alkali metal cations and solvated water molecules significantly reduces the connectivity of the hydrogen bond network within the alkaline electric double layer, thereby ...
Kaiming Li, Ben Huang, Aihao Xu, Kai Nie, Xianhai Bai, Qian Ning, Guodong Wang, Shiming Qiu, Huibing He, Yang Ren, Jing Xu, Xucai Yin   +11 more
wiley   +1 more source

Cytotoxic Quinones from the Roots of Aloe dawei

Molecules, 2014
Seven naphthoquinones and nine anthraquinones were isolated from the roots of Aloe dawei by chromatographic separation. The purified metabolites were identified by NMR and MS analyses.
Negera Abdissa, Martha Induli, Paul Fitzpatrick, John Patrick Alao, Per Sunnerhagen, Göran Landberg, Abiy Yenesew, Máté Erdélyi   +7 more
doaj   +1 more source

Photoelectrochemical Hydrogen Peroxide Production via Simultaneous Reduction and Oxidation Processes

Chemistry – A European Journal, EarlyView.
Hydrogen peroxide (H2O2) is an important chemical substance and also a promising carbon‐free clean fuel. The design of a sophisticated photoelectrochemical (PEC) reaction system enables the solar‐driven H2O2 production through simultaneous water oxidation and oxygen reduction processes (H2O2/H2O2‐PEC cells).
Tetsuro Soejima, Shin‐ichi Naya, Hiroaki Tada   +2 more
wiley   +1 more source

Atmosphere‐Regulated Pyrolysis Switches ORR Pathway on Iron‐Based Catalyst for H2O2 Synthesis and Zn‐Air Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Two Fe‐based electrocatalysts with different ORR selectivity were synthesized from a FeMOF in N2 or air atmosphere, which show promising prospects in Zn‐air battery and H2O2 production. Developing simple methods to achieve flexible regulation of oxygen reduction reaction (ORR) selectivity is essential for sustainable energy technologies, yet remains ...
Songhan Hu, Mingyuan Ma, Xinxin Xu, Kai Wang, Qiang Wang   +4 more
wiley   +1 more source

Hydrothermal Alkali‐Assisted Growth of Highly In‐Plane Crystallized Poly(Heptazine Imide) for Photocatalytic H2O2 Production

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A new re‐crystallization strategy was employed to design a highly crystallized poly(heptazine imide) photocatalyst, achieving strong light absorption capacity, accelerated separation/migration of photocarriers, and enhanced proton extraction capability simultaneously.
Xiaojuan Zhi, Hongguan Li, Yuxin Zhu, Xinglong Li, Jinfu Zhao, Zhongbiao Li, Jian Zeng, Jihoon Choi, Suvankul Nurmanov, Olim Ruzimuradov, Shulan Wang, Li Li   +11 more
wiley   +1 more source

Bioactive Compounds From Torbangun [Plectranthus Amboinicus (Lour.) Spreng] Chloroform Fraction Induce Apoptosis in Breast Cancer (Mcf-7 Cells) in Vitro [PDF]

, 2017
Torbangun (Plectranthus amboinicus (Lour.) Spreng) is a medicinal plant that has been traditionally used in tropical countries to cure various illnesses.
Andarwulan, N. (Nuri), Giriwono, P. E. (Puspo), Pamungkas, J. (Joko), Yulianto, W. (Wahid)   +3 more
core  

Membrane Engineering for Battery Systems: Bridging Design Principles and Frontier Applications

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The review emphasizes membrane separators' role in battery performance and safety, covering redox flow, lithium‐ion, and solid‐state batteries. It reviews advances in membrane materials (e.g., polymer electrolytes, hybrid composites) and ion transport mechanisms, while addressing challenges like dendrite growth and crossover losses.
Xiaoqun Zhou, Justice Delali Akoto, Rui Tan, Jun Ma   +3 more
wiley   +1 more source

Boosting Photocatalytic H2O2 Synthesis Over HKUST‐1 MOFs‐Derived Hollow HKUST‐1@CuFePBA@CuS Heterojunctions

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Photoelectron transfer mechanism and photocatalytic O2‐to‐H2O2 reduction process over hollow HS@CuFe@CuS heterojunction photocatalysts. Recently, photocatalytic synthesis of H2O2 has received much attention. However, the photocatalytic activity of photocatalysts is generally limited due to multiple factors, such as insufficiency of photoelectrons, low ...
Xiao Mu, Xiaofeng Sun, Zao Yi, Shifa Wang, Babak Kakavandi, Guorong Liu, Hua Yang   +6 more
wiley   +1 more source

Studies on Woolen Threads from Historical Tapestries [PDF]

, 2007
Fourier transform (FTIR) attenuated total reflectance (ATR)and second derivative spectroscopy has been used for the first time to evaluate the state of degradation in historical woollen threads from the collections of Flemish tapestries (15th-17th ...
Campana, Roberto, Odlyha, Marianne, Theodorakopoulos, Charis   +2 more
core