Results 21 to 30 of about 264,992 (304)

Synthesis and complete NMR spectral assignments of new benzylamino coumarin derivative [PDF]

Bulletin of Natural Sciences Research, 2020
This research involves the reaction of 4-chloro-3-nitrocoumarin and (4-methoxyphenyl)methanamine, whereby a novel coumarin derivative 4-[(4-methoxybenzyl) amino]-3-nitro-2H-chromen-2-one was obtained in good yield.
Dekić Vidoslav, Radulović Niko, Ristić Milenko, Dekić Biljana, Ristić Novica   +4 more
doaj  

Core testing technology with T2-Pc two-dimensional nuclear magnetic resonance and its application

Shiyou shiyan dizhi, 2021
As a non-destructive, efficient and non-invasive detection method, nuclear magnetic resonance (NMR) technology has always played an important role in the analysis of oil and gas cores, but the traditional nuclear magnetic resonance detection results (T2 ...
Yao CHEN, Gong ZHANG, Guoqing ZHENG, Qing PENG, Yingyao Qin   +4 more
doaj   +1 more source

Spectroscopic Study of $^{75}$As and $^{139}$La NMR on Layered Structure Ferromagnet LaCoAsO [PDF]

, 2010
$^{75}$As and $^{139}$La field-swept NMR spectra were obtained for the novel weakly itinerant ferromagnet LaCoAsO with 2D layered structure above the Curie temperature of 55 K.
Grafe H.-J., Hegger H., Hsu F. C., Ishikado M., Kamihara Y., Kitagawa K., Kitagawa K., Maeno Y., Mendelsohn L. B., Moriya T., Nientiedt A. T., Ogino H., Ohta H., Ohta H., Rotter M., Sefat A. S., Seitchik J. A., Sugawara H., Takada K., Takahashi Y., Wang X. C., Watanabe T., Yanagi H., Yoshimura K., Zimmer B. I.   +24 more
core   +1 more source

5-Hydroxy-3-(4-hydroxyphenyl)-8,8-dimethyl-6- (3-methylbut-2-enyl)pyrano[2,3-h]chromen-4-one [PDF]

, 2018
Natural and semi-synthetic compounds are being studied as novel phosphodiesterase 5 (PDE5) inhibitors for the treatment of erectile dysfunction, pulmonary hypertension, and lower urinary symptoms.
Ongaro, Alberto, Ribaudo, Giovanni, Zagotto, Giuseppe   +2 more
core   +1 more source

Insights into DNA platination within unusual structural settings [PDF]

, 2011
2D [1H, 15N] HSQC NMR spectroscopy has been used to monitor reaction and product formation between [Pt(15NH3)2I2] and nucleic acids possessing irregular topologies and containing site specific phosphorothioate substitution in the phosphodiester backbone.
Harvie, Stephanie, Parkinson, John A, Wilson, Owen   +2 more
core   +2 more sources

Validating heteronuclear 2D quantitative NMR [PDF]

Analytical Methods, 2016
NMR is used extensively for accurate quantitation of simple analytes and can, with careful application, generate SI traceable measurements.
Fardus-Reid, Fahmina, Warren, John, Le Gresley, Adam   +2 more
openaire   +2 more sources

Ultrafast 2D benchtop NMR spectroscopy enhanced by flow Overhauser dynamic nuclear polarization

Journal of Magnetic Resonance Open
Benchtop Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful analytical technique for the monitoring of reactions and processes due to its accessibility and lower cost compared to high-field NMR.
Joris Mandral, Johnnie Phuong, Jonathan Farjon, Patrick Giraudeau, Kerstin Münnemann, Jean-Nicolas Dumez   +5 more
doaj   +1 more source

Dynamics of Quasi-ordered Structure in a Regio-regulated pi-Conjugated Polymer:Poly(4-methylthiazole-2,5-diyl)

, 2004
Dynamics of regio-regulated Poly(4-methylthiazole-2,5-diyl) [HH-P4MeTz] was inves tigated by solid-state 1H, 2D, 13C NMR spectroscopies, and differential scanning calorimetry(DSC) measurements.
D. C. Ailion, E. R. Andrew, F. Milia, J. I. Nanos, J.-W. van der Horst, K. Schmidt-Rohr, L. Muntean, N. Asakawa, Naoki Asakawa, R. Blinc, R. D. McCullough, R. D. McCullough, R. R. Ernst, Seiichiro Mori, T. Yamamoto, T. Yamamoto, T. Yamamoto, T. Yamamoto, T. Yamamoto, Takakazu Yamamoto, W. R. Salaneck, Yoshio Inoue   +21 more
core   +1 more source

Addition of Di(trimethylsilyl) Phosphite to Schiff Bases of 2,5-Diformylfuran [PDF]

, 2011
A series of 2,5-Furanyl-bis-(aminomethylphosphonic Acids) has been synthesized by the addition of di(trimethylsilyl) phosphite to azomethine bond of achiral Schiff bases derved from 2,5-diformylfuran.
Ciechańska, Magdalena, Dzięgielewski, Marek, Lewkowski, Jarosław, Szcześniak, Aleksandra   +3 more
core   +1 more source

Evaluation of the cytotoxic potential of a new pentacyclic triterpene from Rhododendron arboreum stem bark

Pharmaceutical Biology, 2017
Context: Traditionally, Rhododendron arboreum Sm. (Ericaceae) is a very important medicinal plant having oxytocic, estrogenic, anti-inflammatory, analgesic and hepatoprotective activities; it also inhibits the prostaglandin synthetase.
Sajid Ali, Muhammad Nisar, Muhammad Qaisar, Aslam Khan, Abid Ali Khan   +4 more
doaj   +1 more source