Results 31 to 40 of about 1,352,916 (332)

Research Progress of Free Radical Chemistry-Tandem Mass Spectrometry for Fine Structure Analysis of Lipids [PDF]

Zhipu Xuebao
As one of the six major nutrients, lipids play important roles in various biological processes, including cell membrane construction, signal transduction, and energy metabolism.
JIAN Rui-jun, XIA Yu
doaj   +1 more source

The Kinetic Monte Carlo Model of the Auroral Electron Precipitation into N₂-O₂ Planetary Atmospheres

Universe, 2022
Auroral events are the prominent manifestation of solar/stellar forcing on planetary atmospheres. They are closely related to the energy deposition by and evolution of planetary atmospheres, and their observations are widely used to analyze the ...
Dmitri Bisikalo, Valery Shematovich, Benoit Hubert   +2 more
doaj   +1 more source

Study of fragmentation dynamics for CO2q+ (q≤4) in strong laser fields

He jishu, 2022
BackgroundThe research of molecular fragmentation dynamics has attracted extensive attention in the fields of physics, chemistry and biology. The major challenge in this field is to understand the selectivity of molecular bond breaking and to elucidate ...
ZHANG Shuai, JIANG Wenbin, WANG Xincheng, JIANG Yuhai, ZHU Zhiyuan   +4 more
doaj   +1 more source

Antiradical Activity of Beetroot (Beta vulgaris L.) Betalains

Molecules, 2021
Flavonoids, phenolic acids, and anthocyanidins are widely studied polyphenolics owing to their antiradical activity. Recently, beetroot dyes have drawn an attention as possible radical scavengers, but scant information can be found on this topic. In this
Maciej Spiegel, Andrzej Gamian, Zbigniew Sroka   +2 more
doaj   +1 more source

Contextualizando reações ácido-base de acordo com a teoria protônica de Brönsted-Lowry usando comprimidos de propranolol e nimesulida

Química Nova, 2013
This paper reports the use of alternative materials for teaching experimental chemistry. In this context, nimesulide and propranolol tablets were used to teach chemical concepts about acid-base reactions according to Brönsted-Lowry protonic Theory ...
Arlan de Assis Gonsalves, Cleônia Roberta Melo Araújo, Carlos Alberto Leite Filho, Felipe Santana de Medeiros   +3 more
doaj   +1 more source

Are the program packages for molecular structure calculations really black boxes? [PDF]

Journal of the Serbian Chemical Society, 2007
In this communication it is shown that the widely held opinion that compact program packages for quantum–mechanical calculations of molecular structure can safely be used as black boxes is completely wrong.
ANA MRAKOVIC, MILICA DRVENDZIJA, ALEKSANDRA SAMOLOV, MILENA PETKOVIC, MILJENKO PERIC   +4 more
doaj   +3 more sources

In-depth sphingomyelin characterization using electron impact excitation of ions from organics and mass spectrometry[S]

Journal of Lipid Research, 2016
Electron impact excitation of ions from organics (EIEIO), also referred to as electron-induced dissociation, was applied to singly charged SM molecular species in the gas phase.
Takashi Baba, J. Larry Campbell, J. C. Yves Le Blanc, Paul R.S. Baker   +3 more
doaj   +1 more source

On-surface light-induced generation of higher acenes and elucidation of their open-shell character

Nature Communications, 2019
The synthesis of large acenes via traditional solution-chemistry routes is hindered by their poor solubility and high reactivity under ambient conditions.
José I. Urgel, Shantanu Mishra, Hironobu Hayashi, Jan Wilhelm, Carlo A. Pignedoli, Marco Di Giovannantonio, Roland Widmer, Masataka Yamashita, Nao Hieda, Pascal Ruffieux, Hiroko Yamada, Roman Fasel   +11 more
doaj   +1 more source

Gas hydrates in sustainable chemistry.

Chemical Society Reviews, 2020
Gas hydrates have received considerable attention due to their important role in flow assurance for the oil and gas industry, their extensive natural occurrence on Earth and extraterrestrial planets, and their significant applications in sustainable ...
A. Hassanpouryouzband, E. Joonaki, Mehrdad Vasheghani Farahani, S. Takeya, C. Ruppel, Jinhai Yang, Niall J. English, J. Schicks, K. Edlmann, Hadi Mehrabian, Z. Aman, B. Tohidi   +11 more
semanticscholar   +1 more source

AQUA AMMONIA ELECTROLYTIC CHARACTER AND TPP COOLANT CONDUCTOMETRIC QUALITY CONTROL UNDER HIGH TEMPERATURES AND PRESSURES

Advanced Engineering Research, 2013
To improve the operational conductometric steam quality control at the TPP, CHPP, and NPP, the technique for NaCl and NH4OH concentration in the saturated and superheated steam of the high- and supercritical pressure steam generators is developed, and a ...
Vladimir Nikolayevich Shcherbakov, Grigory Andreyevich Vlaskov   +1 more
doaj   +1 more source