Results 61 to 70 of about 11,091 (232)

Natural Anthraquinone‐Like Compound Extracted from Green Husk of Walnut Improves Photocatalytic H2O2 Production Catalyzed by TiO2 Nanoparticles

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
In this work, a novel biomolecule/semiconductor hybrid catalyst was prepared by loading anthraquinone‐liked juglone onto anatase TiO2. This catalyst exhibited high photocatalytic activity for H2O2 production. Hydrogen peroxide (H2O2) is a vital oxidant with broad industrial applications, and its production via photocatalysis represents a highly ...
Zengyin He, Cui Li, Mingze Ni, Shu Lin, Kezhen Qi   +4 more
wiley   +1 more source

Canadine synthase from Thalictrum tuberosum cell cultures catalyses the formation of the methylenedioxy bridge in berberine synthesis [PDF]

, 1994
An enzyme system catalysing the formation of the methylenedioxy bridge at ring A of (S)-canadine [ = (S)-tetrahydroberberine] from (S)-tetrahydrocolumbamine has been detected in microsomal preparations from different Ranunculaceae and Berberidaceae cell ...
Rüffer, Martina, Zenk, Meinhart H.
core   +2 more sources

Push–Pull Ynamines and Push–Pull Ynamides: Synthesis, Structure, Reactivity, and Application

European Journal of Organic Chemistry, EarlyView.
Push–pull ynamines and push–pull ynamides, which carry an EWG and an amino or amido group as EDG, are highly interesting classes of EDG‐EWG alkynes that have been intensively studied due to their exceptional reactivity. In this review, the synthesis, structure, reactivity, and application of push–pull ynamines, push–pull ynecarbamates, push–pull ...
Hans‐Joachim Gais
wiley   +1 more source

Colour, health and wellbeing: the hidden qualities and properties of natural dyes [PDF]

, 2013
This paper addresses the questions: Is it feasible that the chemicals present in the natural dyes of both plants and insects which in the past, man has exploited for their colour, could exhibit other properties?
Wells, Kate
core   +1 more source

Hofmann Degradation of Asparagine and Glutamine as an Efficient Approach for the Synthesis of Derivatized Lysine Homologs

European Journal of Organic Chemistry, EarlyView.
A practical and scalable route to C1 and C2 lysine homologs has been developed using Hofmann degradation of N‐protected L‐asparagine and L‐glutamine as the key step. These short‐tether scaffolds enable efficient synthesis of diverse Fmoc‐protected noncanonical amino acids (ncAAs) bearing donor, acceptor, redox‐active, and fluorescent residues.
Adelaide R. Mashweu, François J. De Beer, Jolien Bertouille, Steven Ballet, Charlotte Martin, Ulrich Hennecke, Charlene Marais, Vladimir A. Azov   +7 more
wiley   +1 more source

The Antifungal Activity of Naphthoquinones: An Integrative Review

Anais da Academia Brasileira de Ciências
Naphthoquinones are the most commonly occurring type of quinones in nature. They are a diverse family of secondary metabolites that occur naturally in plants, lichens and various microorganisms.
DÉBORA O. FUTURO, PATRICIA G. FERREIRA, CAROLINE D. NICOLETTI, LUANA P. BORBA-SANTOS, FERNANDO C. DA SILVA, SONIA ROZENTAL, VITOR FRANCISCO FERREIRA   +6 more
doaj   +1 more source

From planes to bowls: photodissociation of the bisanthenequinone cation

, 2018
We present a combined experimental and theoretical study of the photodissociation of the bisanthenequinone (C28H12O2) cation, Bq+. The experiments show that, upon photolysis, the Bq+ cation does not dehydrogenate, but instead fragments through the ...
Chen, Tao, Linnartz, Harold, Tielens, Alexander G. G. M., Wang, Ying, Zhen, Junfeng   +4 more
core   +1 more source

Napabucasin transforms liver microenvironment and boosts immunotherapy efficacy by converting potential metastases into “hot” tumors

Interdisciplinary Medicine, EarlyView.
Napabucasin reduces liver metastases by reprogramming the hepatic microenvironment. It induces hepatocyte secretion of CCL21 via c‐Fos activation, recruiting lymphocytes and converting “cold” metastases into immunologically “hot” tumors. This effect is liver‐specific and independent of cancer cells.
Qiongqiong Wang, Jiaqi Zhou, Hang Qiao, Yifan Jia, Ling Ye, Zeli Li, Jiahe Ouyang, Haoxian Zhou, Kangxin Zeng, Xuemeng Wang, Yixian Wang, Yang Zhang, Yupeng Zhang, Yizhou Cai, Yutao Hu, Minzhe Zhang, Wenwei Xu, Zhenzhen Wu, Xiaofang Qiu, Li Lin   +19 more
wiley   +1 more source

Differential influence of four invasive plant species on soil physicochemical properties in a pot experiment [PDF]

, 2017
Purpose This study compared the effects of four invasive plants, namely Impatiens glandulifera, Reynoutria japonica, Rudbeckia laciniata, and Solidago gigantea, as well as two native species-Artemisia vulgaris, Phalaris arundinacea, and their mixture on
Majewska, Marta, Nobis, Marcin, Stanek, Małgorzata, Stefanowicz, Anna, Zubek, Szymon   +4 more
core   +1 more source

Synthesis and Characterization of Juglone‐Derived cu (II), Mn (II) and Zn (II) Complexes and Investigation of Their Cytotoxic Activities Against Lung and Colon Cancer Cells in Vitro and in Silico

Journal of Applied Toxicology, EarlyView.
ABSTRACT Three new Zn (II), Cu (II) and Mn (II) complexes have been synthesized from 5‐hydroxy‐1,4‐naphthoquinone (HNQ). Elemental analysis, magnetic susceptibility, UV–Vis, IR and Mass spectrometry have all been used to explore the structural characterization of these compounds.
Mustafa Öztatlıcı, Turan Birimoğlu, Semih Güler, Rukiye Betül Çolaksel, Mehmet Tahir Husunet, Mehmet Sönmez   +5 more
wiley   +1 more source