Results 21 to 30 of about 267,493 (300)

Isolation of lupeol from the stem bark of Leptadenia hastata (Pers.) Decne

Journal of Applied Sciences and Environmental Management, 2020
Dried stem bark powder of Leptadania hastata was subjected to maceration with methanol to afford crude methanol extract, which was partitioned with n-hexane, ethylacetate, chloroform and n- butanol to afford different their respective fractions ...
M.M. Mailafiya, U.U. Pateh, H.S. Hassan, M.I. Sule, A.H. Bila, T.L. Musa, V Atinga, J.I. Achika   +7 more
doaj   +1 more source

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  

Theoretical studies of 31P NMR spectral properties of phosphanes and related compounds in solution [PDF]

, 2010
Selected theoretical methods, basis sets and solvation models have been tested in their ability to predict 31P NMR chemical shifts of large phosphorous-containing molecular systems in solution.
Al-Farhan, Alajarin, Alam, Aroyan, Bagno, Baidya, Basavaiah, Basavaiah, Basavaiah, Boris Maryasin, Cheeseman, Chernyshev, Chou, Cook, Cook, Costa, Cuypers, Denney, Ditchfield, Driess, Dunne, Epstein, Faltin, Frank, Gauss, Grim, Gutmann, Hansen, Heckmann, Hendrik Zipse, Hinke, Hohenberg, Hrib, Ibrahim, Jameson, Jameson, Jaska, Keith, Kempf, King, Kirk, Krannich, Langer, Lee, Li, Lloyd, Lynch, MacKay, MacKay, Malkin, Malkin, Malkin, Mayer, McKillop, Miyamoto, Moser, Mourik, Naumov, Phan, Přecechtělova, Rablen, Rao, Rauhut, Raymonda, Rezaei-Sameti, Roy, Schindler, Schraml, Schreckenbach, Schreckenbach, Seok, Shi, Singh, Smith, Stewart, Streck, van Wüllen, Vedejs, Vedejs, Vedejs, Vignale, Wang, Wasylishen, Wei, Wei, Wei, Wiberg, Wilson, Wu, Zhu, Ziegler, Zumbulyadis   +91 more
core   +1 more source

Conversion of Lignocellulose Studied by Nuclear Magnetic Resonance

Chinese Journal of Magnetic Resonance, 2021
Nuclear magnetic resonance (NMR) is an important characterization method for the depolymerization of lignocellulosic biomass and its structure evolution analysis.
Xiao-li CHEN, Wei LV, Qiu-cheng SU, Juan FU, Jia-mei MO, Qi-ying LIU   +5 more
doaj   +1 more source

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

A solution NMR approach to determine the chemical structures of carbohydrates using the hydroxyl groups as starting points [PDF]

, 2018
An efficient NMR approach is described for determining the chemical structures of the monosaccharide glucose and four disaccharides, namely, nigerose, gentiobiose, leucrose and isomaltulose.
Bauer, Julia, Brown, Geoffrey D., Kuemmerle, Rainer, Osborn, Helen M. I.   +3 more
core   +2 more sources

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

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