Results 51 to 60 of about 113,330 (98)

Pushing nuclear magnetic resonance sensitivity limits with microfluidics and photo-chemically induced dynamic nuclear polarization

Nature Communications, 2018
Nuclear magnetic resonance (NMR) spectroscopy is a powerful technique with an inherently low sensitivity. Here, the authors present a combination of microcoils with photo-chemically induced dynamic nuclear polarization to boost NMR sensitivity down to ...
Miguel Mompeán, Rosa M. Sánchez-Donoso, Antonio de la Hoz, Vittorio Saggiomo, Aldrik H. Velders, M. Victoria Gomez   +5 more
doaj   +1 more source

Isolation, structural elucidation, and antioxidant potential of phytomelatonin from tomato (Solanum lycopersicum L.) leaves

Frontiers in Pharmacology
Melatonin (N-acetyl-5-methoxytryptamine) is an indoleamine compound present in both animal and plant kingdoms. Melatonin, a potent antioxidant, is currently produced synthetically, which is often associated with the presence of toxic by-products.
Kumar Varshini, Theivasigamani Parthasarathi   +1 more
doaj   +1 more source

DFT STUDY OF THE TUBULAR SIZE EFFECTS ON THE PROPERTIES OF ZIGZAG BORON NITRIDE NANOTUBES

Studia Universitatis Babes-Bolyai Chemia, 2017
Density functional theory (DFT) studies were performed on representative zigzag models of boron nitride nanotubes (BNNTs) with different structural sizes. To achieve minimized-energy structures and their properties, first, optimization calculations were
Fatemeh SHEKHOLIA LAVASANI, Abolghasem SHAMELI, Ebrahim BALALI   +2 more
doaj   +1 more source

A digital twin for parallel liquid-state nuclear magnetic resonance spectroscopy [PDF]

Commun Eng
One approach to increasing nuclear magnetic resonance measurement sample throughput is to implement multiple, independent detection sites. However, the presence of radio frequency interference poses a challenge in multi-detector systems, particularly in ...
He M, Faderl D, MacKinnon N, Cheng Y, Buyens D, Jouda M, Luy B, Korvink J.   +7 more
europepmc   +2 more sources

Influence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) Spectroscopy

Georesursy
The influence of core properties on the state of residual oil in the process of oil displacement by water at the micro level is investigated. The pore size distribution, core permeability, dynamics and morphology of residual oil were studied.
Jiali Mo, N. N. Mikhailov, Hengyang Wang
doaj   +1 more source

RADICALIZATION OF TMP FIBERS AND RELATED STRUCTURAL CHANGES

BioResources, 2008
Oxidation of TMP fibers at 298 K with molecular oxygen, in the presence of either [Co(salen)] in methanol or [Co(sulphosalen)] in water, were compared.
Luca Zoia, Carmen Canevali, Marco Orlandi, Eeva-Liisa Tolppa, Jussi Sipila, Franca Morazzoni   +5 more
doaj  

Incorporation of Spin Labels and Paramagnetic Tags for Magnetic Resonance Studies Using Cycloaddition Reactions as a Tool

Reactions
The cycloaddition reaction is one of the most common reactions in organic chemistry. It has been applied in various fields. Herein, we focus on the application of cycloaddition reactions in investigating biological molecules and materials using magnetic ...
Amarendra Nath Maity, Amiya Kumar Medda, Shyue-Chu Ke   +2 more
doaj   +1 more source

2-(Butylamino)-6-chloro-4-[3-(7-chloro-4-quinolylamino)propylamino]-1,3,5-triazine

Molbank
We herein report the synthesis of a 7-chloro-aminoquinoline triazine conjugate. The s-triazine library was generated by stepwise nucleophilic substitution of cyanuric chloride with butylamine.
Zimo Ren, Yuzhu Guo, Yang Xiao, Alessandra Gianoncelli, Paolo Coghi, Giovanni Ribaudo   +5 more
doaj   +1 more source

A NEW METHODOLOGY FOR THE EXAMINATION OF SAFETY AND QUALITY OF PHARMACEUTICALS AND DIETARY SUPPLEMENTS

RUDN Journal of Ecology and Life Safety, 2016
The aim of the article is a new methodology based on a combination of nuclear magnetic resonance spectroscopy, mass spectrometry and spectroscopy in the near infrared region for the analysis of quality of medicines and dietary supplements and identifying
A S Prokop’ev, V A Ivlev, G A Kalabin
doaj  

Accessing Altered Metabolic Profile in Acute Deep Vein Thrombosis Through Nuclear Magnetic Resonance Spectroscopy. [PDF]

Int J Mol Sci
Queiroz da Silva L, Santana da Costa T, Gelain Martins L, de Lima Montalvão SA, Cares Huber S, Martins Silva Soares S, Tasic L, Annichino-Bizzacchi JM.   +7 more
europepmc   +1 more source