نتایج جستجو برای: 2h

تعداد نتایج: 10858  

Journal: :Molecules 2017
Agata J Pacuła Katarzyna B Kaczor Jędrzej Antosiewicz Anna Janecka Angelika Długosz Tomasz Janecki Andrzej Wojtczak Jacek Ścianowski

New chiral camphane-derived benzisoselenazol-3(2H)-ones and corresponding diselenides have been synthetized using a convenient one-pot procedure. Se-N bond was efficiently converted to an Se-Se bond, which could also be easily re-oxidized to the initial benzisoselenazolone moiety. The antioxidant activity of camphor derivatives was evaluated and compared to the reactivity of a series of N-amino...

Journal: :Molecules 2012
Naceur Hamdi Abdullah Sulaiman Al-Ayed Ridha Ben Said Alary Fabienne

New coumarin derivatives, namely (2-(4-methyl-2-oxo-2H-chromen-7-yloxy)-N-(4-oxo-2-phenylthiazolidin-3-yl)acetamide, N-(2-(3-methoxyphenyl)-4-oxothiazolidin-3-yl)-2-(4-methyl-2-oxo-2H-chromen-7-yloxy)acetamide, 2-(4-methyl-2-oxo-2H-chromen-7-yloxy)-N-(4-oxo-2-(2,3,4trimethoxyphenyl)thiazolidin-3-yl)acetamide and N-(2-(4-bromophenyl)-4-oxothiazolidin-3-yl)-2-(4-methyl-2-oxo-2H-chromen-7-yloxy)ac...

Journal: :iranian chemical communication 0
hamid saeidian department of science, payame noor university (pnu), po box: 19395-4697, tehran, iran farzaneh moradnia department of chemistry, payame noor university, p. o. box 19395-3697, tehran, iran.

an efficient construction of 2-(n-arylamino)benzaldehydes and n-aryl-3,10-dihydroacridin-1(2h)-one derivatives starting from 2- hydroxybenzaldehydes has been developed. the synthesis of n-aryl-3,10-dihydroacridin-1(2h)-ones is based on the knoevenagel condensation of dimedone to various 2-(n-arylamino)benzaldehydes, followed by an intramolecular enamination in the presence of 20 mol% of nanocry...

Journal: :Physical chemistry chemical physics : PCCP 2010
Thorsten Maly Loren B Andreas Albert A Smith Robert G Griffin

Perdeuteration of biological macromolecules for magic angle spinning solid-state NMR spectroscopy can yield high-resolution (2)H-(13)C correlation spectra and the method is therefore of great interest for the structural biology community. Here we demonstrate that the combination of sample deuteration and dynamic nuclear polarization yields resolved (2)H-(13)C correlation spectra with a signal e...

2017
Jessie Guyader Emilio M. Ungerfeld Karen A. Beauchemin

A decrease in methanogenesis is expected to improve ruminant performance by allocating rumen metabolic hydrogen ([2H]) to more energy-rendering fermentation pathways for the animal. However, decreases in methane (CH4) emissions of up to 30% are not always linked with greater performance. Therefore, the aim of this study was to understand the fate of [2H] when CH4 production in the rumen is inhi...

Journal: :Physical chemistry chemical physics : PCCP 2015
Gabriel Marchand Hélène Roy David Mendive-Tapia Denis Jacquemin

Using first-principle calculations, we characterize the properties of N-confused porphyrins (NCP), with a focus on the differences between the 2H and 3H tautomers. We find that NCP-3H is almost as strongly aromatic as porphyrin, and about twice as aromatic, i.e., remarkably more stable, than NCP-2H, due to the less efficient π-conjugation in the latter form. The deprotonation of the NH-group at...

Journal: :Journal of environmental quality 2002
L Wu L Q Ma

Establishing a simple yet reliable compost stability test is essential for a better compost quality control and utilization efficiency. The objective of this study was to examine the relationship between extractable organic carbon (OC) and compost stability based on 18 compost samples from five composting facilities. The compost samples were extracted sequentially with water for 2 h [water(2h)]...

Journal: :Studies in health technology and informatics 2021

The early adoption of digital health solutions in the treatment growth disorders has enabled collection and analysis more than 10 years real-world data using easypod™ connect platform. Using this rich dataset, we were able to study impact engagement on three key treatment-related outcomes: adherence, persistence use, growth. In total, for 17,906 patients available. features, regularity injectio...

2003
Xinhua Wan Zhenning Yu Hailiang Zhang Xiaofang Chen Qi-Feng Zhou

(+)-2,5-Bis[4’-((S)-2-methyl butyoxy)phenyl]toluene (3a): 0.048 mol (10 g) 4-[(S)-2-methyl butoxyl]phenylboronic acid dissolved in 20 ml of ethanol is added dropwise to the mixture of 0.02 mol (5 g) of 2,5-dibromotoluene, 0.8 mmol (0.924 g) tetrakis(triphenylphosphine)palladium Suzuki cross-coupling catalyst, 20 ml of benzene, 40 ml of ethanol, and 60 ml of 2M Na2CO3 aqueous solution under argo...

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