Results 91 to 100 of about 125,915 (317)

Using a fluorescence proximal sensor to study the spatial variability of grape phenols in a tempranillo vineyard [PDF]

, 2011
The phenolic content of berries is a very important parameter to define grape and wine quality. The aim of this work was to study the spatial variability of grape phenols in a vineyard using a new proximal fluorescence sensor.
Ochagavia, H., Baluja, J., Tardaguila, J. [0000-0002-6639-8723], Rocchi, L., Diago, M.P. [0000-0003-4049-0879]   +4 more
core  

Reactions of Phenolic Mannich Bases with Phenols

The Journal of the Society of Chemical Industry, Japan, 1958
1)フェノールマンニッヒ塩基とフェノール類との反応は,フェノール性OH基の酸性度が大きいほど分解反応大でまたフェノール類添加により促進されるが,アニソールのようにOH基を有しないと促進しない。2)ニトロフェノール,アニリン等の添加により分解反応が促進される。また,これがオルトマンニッヒ塩基と,パラ,マンニッヒ塩基とにより大きく差を生じ,オルトマンニッヒ塩基において効果大で,パラマンニッヒ塩基であまり効果を認めなかった。3)オルトマンニッヒ塩基で,2,4-二置換フェノールを用いたものと相手フェノールを2,4-ジメチルフェノールとの,反応で, 発生ジメチルアミンの追跡により, 初期反応を2 次反応速度として取扱うことができる。マンニッヒ塩基の置換基RがCH3では活性化熱13.6kcal/mol ...
Keiichi Azuma, Toshiyuki Kitamura, Shigeo Fukuzaki, Eiji Imoto   +3 more
openaire   +2 more sources

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

Simple and improved regioselective brominations of aromatic compounds using N-benzyl-N,N-dimethylanilinium peroxodisulfate in the presence of potassium bromide under mild reactions conditions [PDF]

Journal of the Serbian Chemical Society, 2011
A simple, efficient, and mild method for the selective bromination of some activated aromatic compounds using N-benzyl-N,N-dimethylanilinium peroxodisulfate in the presence of potassium bromide in non-aqueous solution is reported.
HASSAN GHASEMNEJAD-BOSRA, FARHAD RAMZANIAN-LEHMALI, SOMAYE JAFARI   +2 more
doaj  

Amination of Phenols and Halophenols via Pyridinium–Iridium Dual Photocatalysis

In this study, we present a photochemical method for the amination of phenols (C–H) and halophenols (SNAr), facilitated by dual catalytic pathways involving both Ir(III) photocatalysis and phenol–pyridinium EDA complexation. By incorporating a pyridinium
Marisa C., Kozlowski, Matthew C. , Carson, Cindy R. , Liu, Yaning, Liu   +3 more
core   +1 more source

A convenient synthesis of phenols

, 2018
Anilines are rapidly, often within 60 minutes, converted into the corresponding phenols in up to 87% isolated yield. The presented experimentally simple protocol display broad compatibility with a variety of functional groups, and in particular, well ...
Renate Kristianslund (4971502), Anders Vik (1316910), Trond V. Hansen (1316919)   +2 more
core   +1 more source

From Food to Power: Hydrogel Thermoelectrics for Ingestible Electronics

Advanced Functional Materials, EarlyView.
We introduce a fully edible thermoelectric–electrochromic platform that harvests heat from food and converts it into a visible color change. N‐type and p‐type hydrogel thermoelectric generators connected in series power anthocyanin‐based electrochromic displays, demonstrating the feasibility of safe, biodegradable, ingestible systems for on‐food ...
Antonia Georgopoulou, Bokeon Kwak, Dario Floreano, Esther Amstad   +3 more
wiley   +1 more source

Novel methodology for the synthesis of ¹³C-Labelled phenols and its application to the total synthesis of polyphenols

, 2010
Electronic redacted version does not contain associated previously published materialThe base-catalysed reaction of 4H-pyran-4-one with a range of nucleophiles, namely diethyl malonate, ethyl acetoacetate, nitromethane, acetylacetone and ethyl ...
Marshall, Laura
core  

Olive oil phenols are absorbed in humans

, 2002
Animal and in vitro studies suggest that olive oil phenols are effective antioxidants. The most abundant phenols in olive oil are the nonpolar oleuropein- and ligstroside-aglycones and the polar hydroxytyrosol and tyrosol.
Vissers, M.N., Leenen, R., Zock, P.L., Roodenburg, A.J.C., Katan, M.B.   +4 more
core   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source