Results 21 to 30 of about 223,391 (261)
Polymer Testing, 2022 Co-oligomers of carbon dioxide and propylene oxide with high carbonate content and terminated by hydroxyl groups are practically important polyols to synthesize block copolymers.
Kirill Alferov +5 more
doaj +1 more source
Nanogram-scale preparation and NMR analysis for mass-limited small volatile compounds. [PDF]
PLoS ONE, 2011 Semiochemicals are often produced in infinitesimally small quantities, so their isolation requires large amounts of starting material, not only requiring significant effort in sample preparation, but also resulting in a complex mixture of compounds from ...
Satoshi Nojima +4 more
doaj +1 more source
Complex Mixture Analysis of Organic Compounds in Yogurt by NMR Spectroscopy
Metabolites, 2016 NMR measurements do not require separation and chemical modification of samples and therefore rapidly and directly provide non-targeted information on chemical components in complex mixtures.
Yi Lu +3 more
doaj +1 more source
Synthesis and characterization of 2,3,13,14-tetramethyl (ethyl or p-tolyl)- 1,4,12,15-tetraazacyclodocosa-1,3,12,14-tetraene complexes of Mg(II), Ca(II), Sr(II) and Ba(II) [PDF]
Journal of the Serbian Chemical Society, 2002 2+2 Cyclocondensation of 1,7-diaminoheptane with α-diketones, viz 2,3-butanedione, 3,4-hexanedione or 4,4’-dimethylbenzil, in the presence of Mg2+, Ca2+, Sr2+ and Ba2+ ions as templates yields a series of complexes of the type [ML(X2)](where L = N4 ...
Prasad Raghu N., Gupta Seema
doaj +1 more source
Synthesis of Substituted Phenyl N-(2-hydroxybenzyl)-N-Methylcarbamates
Molecules, 2002 Thirteen previously unreported substituted phenyl N-(2-hydroxybenzyl)-Nmethylcarbamates were prepared by the reaction of substituted 2-hydroxybenzyl-Nmethylamines with phenyl chlorocarbonates. They were identified by their 1H- and 13C-NMR spectra.
JaromÃÂr Kaválek +3 more
doaj +1 more source
The Journal of the Society of Chemical Industry, Japan, 1965 α-グリコールの異性体のNMRスペクトルをとった結果,その水酸基の立体配置によって水酸基のプロトンの化学シフトに差が現われた。すなわち,常温で液体のα-グリコールでは,その水酸基のプロトンのシグナルはエリスロ体またはトランス体がスレオ体またはシス体より低磁場に現われた。この傾向は塩基性溶媒,ピリジンを溶媒とした時にも見られた。酸性溶媒を用いた場合には水酸基のプロトンはカルボキシル基のプロトンとexchangeして, 1本のconcetra-tion shiftを示すが, やはり水酸基のプロトンの挙動は塩基性溶媒の場合と同じであった。しかし, 5 員環化合物では酸の濃度が高いとき,異性体間の傾向が逆になることを見出した。
Yasuhisa SENDA +2 more
openaire +2 more sources
Metabolites, 2016 Foods from agriculture and fishery products are processed using various technologies. Molecular mixture analysis during food processing has the potential to help us understand the molecular mechanisms involved, thus enabling better cooking of the ...
Eisuke Chikayama +6 more
doaj +1 more source
www.nmrdb.org: Resurrecting and Processing NMR Spectra On-line
CHIMIA, 2008 NMR spectroscopy is certainly the analytical methodology that provides the most information about a molecule but the long-term vision of this information is often lacking. We present here two innovative tools accessible free from the web.
Damiano Banfi, Luc Patiny
doaj +1 more source
Molecular Oncology, EarlyView.The novel styrylquinazolinone‐based molecule W1B effectively suppresses glioblastoma by inhibiting IGF1R and EGFR. In high‐glucose microenvironments driving tumor resistance, W1B acts synergistically with the EGFR inhibitor dacomitinib. This combination safely blocks compensatory survival signaling in zebrafish xenograft models. Showcasing promising in
Patryk Rurka +9 more
wiley +1 more source
Interpreting 2D-NMR spectra using Grad-CAM [PDF]
Research Ideas and OutcomesIt has been shown that it is possible to train a (simple) neural network to classify nuclear magnetic resonance spectra by a substructures either being part of the chemical structure measured or not.
Enriko Kroon +3 more
doaj +3 more sources