Results 31 to 40 of about 390,267 (298)

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.
Mraković Ana, Drvendžija Milica, Samolov Aleksandra, Petković Milena, Perić Miljenko   +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

Shock wave study and theoretical modeling of the thermal decomposition of c-C4F8 [PDF]

, 2015
The thermal dissociation of octafluorocyclobutane, c-C4F8, was studied in shock waves over the range 1150-2300 K by recording UV absorption signals of CF2.
Cobos, Carlos Jorge, Hintzer, K., Sölter, L., Tellbach, E., Thaler, A., Troe, J.   +5 more
core   +2 more sources

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

Controlling Chemical Reactions in Confined Environments: Water Dissociation in MOF-74

Applied Sciences, 2018
The confined porous environment of metal organic frameworks (MOFs) is an attractive system for studying reaction mechanisms. Compared to flat oxide surfaces, MOFs have the key advantage that they exhibit a well-defined structure and present significantly
Erika M. A. Fuentes-Fernandez, Stephanie Jensen, Kui Tan, Sebastian Zuluaga, Hao Wang, Jing Li, Timo Thonhauser, Yves J. Chabal   +7 more
doaj   +1 more source

Redox driven B12-ligand switch drives CarH photoresponse

Nature Communications, 2023
CarH is a coenzyme B12-dependent photoreceptor involved in regulating carotenoid biosynthesis. How light-triggered cleavage of the B12 Co-C bond culminates in CarH tetramer dissociation to initiate transcription remains unclear. Here, a series of crystal
Harshwardhan Poddar, Ronald Rios-Santacruz, Derren J. Heyes, Muralidharan Shanmugam, Adam Brookfield, Linus O. Johannissen, Colin W. Levy, Laura N. Jeffreys, Shaowei Zhang, Michiyo Sakuma, Jacques-Philippe Colletier, Sam Hay, Giorgio Schirò, Martin Weik, Nigel S. Scrutton, David Leys   +15 more
doaj   +1 more source

Eigenstates of Thiophosgene Near the Dissociation Threshold -- Deviations From Ergodicity

, 2013
A subset of the highly excited eigenstates of thiophosgene (SCCl$_{2}$) near the dissociation threshold are analyzed using sensitive measures of quantum ergodicity.
Keshavamurthy, Srihari
core   +1 more source

TEACHING OF THE THEORY OF ELECTROLYTIC DISSOCIATION IN HIGH SCHOOL CHEMISTRY [PDF]

School Science and Mathematics, 1921
n ...
openaire   +2 more sources