Results 31 to 40 of about 220,097 (316)

1H NMR Analysis of Cerebrospinal Fluid from Alzheimer’s Disease Patients: An Example of a Possible Misinterpretation Due to Non-Adjustment of pH

Metabolites, 2014
Two publications from the same research group reporting on the detection of new possible biomarkers for the early diagnosis of Alzheimer’s disease (AD), based on the analysis of cerebrospinal fluid samples (CSF) with 1H Nuclear Magnetic Resonance (NMR ...
Thomas Cruz, Stéphane Balayssac, Véronique Gilard, Robert Martino, Christian Vincent, Jérémie Pariente, Myriam Malet-Martino   +6 more
doaj   +1 more source

Validated 1H and 13C Nuclear Magnetic Resonance Methods for the Quantitative Determination of Glycerol in Drug Injections

Molecules, 2018
In the current study, we employed high-resolution proton and carbon nuclear magnetic resonance spectroscopy (1H and 13C NMR) for quantitative analysis of glycerol in drug injections without any complex pre-treatment or derivatization on samples.
Jiaxi Lu, Pengli Wang, Qiuying Wang, Yanan Wang, Miaomiao Jiang   +4 more
doaj   +1 more source

COUMARINS AND OTHER CONSTITUENTS FROM FERULA SINAICA BOISS GROWING IN EGYPT [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 1996
Reinvestigation of the constituents of the dried roots of Ferula sinaica Boiss resulted in the isolation of a new sesquiterpene-coumarin together with three known sesquiterpene-coumarins, two phenylpropanoiids one of them is new and one carotane ...
Omar Abdallah, Zedan Ibraheim
doaj   +1 more source

Structural Elucidation of Hybutimibe

Chinese Journal of Magnetic Resonance
The structure of hybutimibe was analyzed by ultraviolet absorption spectroscopy, infrared absorption spectroscopy, mass spectrometry, nuclear magnetic resonance (1H NMR, 13C NMR, DEPT, 1H-1H COSY, 1H-1H NOESY, 1H-13C HSQC and 1H-13C HMBC) spectroscopy ...
XU Xiaojie, CHEN Yan’an, LI Xufei, ZHANG Yuncai, ZHANG Yong, ZHAN Dongkai, PAN Ting   +6 more
doaj   +1 more source

Probing the calcium and sodium local environment in bones and teeth using multinuclear solid state NMR and X-ray absorption spectroscopy [PDF]

, 2010
Despite the numerous studies of bone mineral, there are still many questions regarding the exact structure and composition of the mineral phase, and how the mineral crystals become organised with respect to each other and the collagen matrix.
Newport, Robert J., Melinda, Duer, Smith, Mark E., Wojciech, Chrzanowski, Qiu, D., Robert, Newport, Knowles, J.C., Pickup, D.M., Duer, M.J., Dong, Qiu, Knowles, Jonathan, Wong, Alan, Knowles, Jonathan C., Qiu, Dong, Laurencin, D., Gan, Zhehong, Duer, Melinda J., Smith, M.E., Chrzanowski, W., David, Pickup, Laurencin, Danielle, Pickup, David M., Chrzanowski, Wojciech, Wong, A., Gan, Z.   +24 more
core   +1 more source

5-[(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione

Molbank, 2010
The title compound, 5-[(3,5-dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione, has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and 3,5-dimethyl-1-phenylpyrazole-4-carbaldehyde in
Salman A. Khan, Abdullah Mohamed Asiri
doaj   +1 more source

Quantification of biomedical NMR data using artificial neural network analysis: lipoprotein lipid profiles from 1H NMR data of human plasma

, 1995
Artificial neural network (ANN) analysis is a new technique in NMR spectroscopy. It is very often considered only as an efficient ‘black-box’ tool for data classification, but we emphasize here that ANN analysis is also powerful for data quantification ...
Hiltunen, Y., Bell, J.D., Ala-Korpela, M.   +2 more
core   +1 more source

Complexation of norfloxacin with DNA in the presence of caffeine [PDF]

, 2006
1H NMR spectroscopy (500 MHz) has been used to quantify the complexation of the antibacterial antibiotic Norfloxacin (NOR) with DNA in the presence of Caffeine (CAF). Separate studies have been made for the self-association of NOR, its hetero-association
Davies, David B., Rybakova, K.A., Evstigneev, M.P.   +2 more
core   +1 more source

Determination of Diethyl Phthalate and Polyhexamethylene Guanidine in Surrogate Alcohol from Russia

International Journal of Analytical Chemistry, 2011
Analytical methods based on spectroscopic techniques were developed and validated for the determination of diethyl phthalate (DEP) and polyhexamethylene guanidine (PHMG), which may occur in unrecorded alcohol.
Yulia B. Monakhova, Thomas Kuballa, Jenny Leitz, Dirk W. Lachenmeier   +3 more
doaj   +1 more source

Data on the characterization of (N-alkylsalicylaldiminato)bis(2-phenylpyridinato)iridium(III)

Data in Brief, 2019
Herein we report the synthesis, characterization data and photophysical properties of iridium(III) complexes having N-alkylated salicylaldimine and 2-phenylpyridine ligands. The structures of novel iridium complexes were assigned by 1H and 13C NMR, 1H–1H
Soichiro Kawamorita, Anna Cho, Lingtao Kong, Takeshi Naota   +3 more
doaj   +1 more source