Results 21 to 30 of about 213,603 (266)

Sequences of Copolyesters by 1H NMR and 31P NMR Spectroscopy [PDF]

Polymer Journal, 1998
31P NMR and 1H NMR spectra of copolyesters containing phosphorus compounds, obtained by ester-exchange reaction, were studied. Poly(ethylene terephthalate) was used as the main component and poly(hydroquinone phenylphosphate), poly[bis(4-hydroxyphenyl)sulfonephenylphosphate], and poly[bis(4-hydroxyphenyl)sulfonemethylphosphate], as phosphorus compounds.
openaire   +1 more source

Combined experimental and computational 1H NMR study of water adsorption onto graphenic materials

Journal of Magnetic Resonance Open, 2023
The effects caused by the interaction with graphene-like layers on the 1H NMR spectra of water molecules adsorbed onto porous carbon materials were investigated by a combination of shielding calculations using density functional theory (DFT) and 1H NMR ...
Alan R. Ambrozio, Thierry R. Lopes, Daniel F. Cipriano, Fábio A.L. de Souza, Wanderlã L. Scopel, Jair C.C. Freitas   +5 more
doaj   +1 more source

Spectral Analysis of Glucose-Based Chiral N-heterocyclic Carbene Precursors

Chinese Journal of Magnetic Resonance, 2018
1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-3-butylimidazolium bromide (compound 2) was synthesized with 1-bromobutane and 1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl) imidazole (compound 1), which is a glucose-derived chiral N-heterocyclic carbene ...
ZHOU Zhong-gao, YUAN Yang-yang, HUANG Li, LIU Jin-xiang, XIE Yong-rong   +4 more
doaj   +1 more source

Microwave-Assisted Regioselective Synthesis and 2D-NMR Studies of New 1,2,3-Triazole Compounds Derived from Acridone

Journal of Chemistry, 2021
A simple and mild protocol towards the synthesis of new 1,2,3-triazole compounds derived from acridone has been developed via regiospecific 1,3-dipolar cycloaddition reaction between 10-(prop-2-yn-1-yl)acridone derivatives and aromatic azides using CuI ...
Mohammed Aarjane, Siham Slassi, Bouchra Tazi, Amina Amine   +3 more
doaj   +1 more source

1H-NMR based lipid profiling of Gossypium hirsutum seed oil at different developmental stages

Current Research in Green and Sustainable Chemistry, 2021
1H-NMR spectroscopy is emerging as powerful robust analytical technique in analyzing bio constituents present in plants. It offers non-invasive method for identification and quantification of several Phyto-constitutes in a single step without much pre ...
Nikita J. Kurkuri, Sanjay Annarao, Prashanth Miyapadavu, Jayalakshmi Kamaiah   +3 more
doaj   +1 more source

A novel quinazolinone insulin receptor inhibitor and its synergy with an EGFR inhibitor in glucose‐driven glioblastoma

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, Wioleta Cieślik, Wojciech Płaziński, Katarzyna Stępnik, Anna Boguszewska‐Czubara, Elżbieta Kot, Robert Musioł, Mateusz Jasica, Anna Mrozek‐Wilczkiewicz, Katarzyna Malarz   +9 more
wiley   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +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

NMR Characterization of Flavanone Naringenin 7-O-Glycoside Diastereomer

Chinese Journal of Magnetic Resonance, 2017
To discriminate R and S flavanone glycoside using NMR, the mixture of R and S naringenin 7-O-glycoside was first isolated from Gleditsia sinensis. 1H and 13C NMR data of the mixture were recorded with 1H NMR, 13C NMR, 1H-1H COSY, 1H-13C HSQC and 1H-13C ...
SUN Li-juan, HU Xiao-fang, CHENG Xun, LUO Li-ting, LIU Hong-bing, CHEN Lei   +5 more
doaj   +1 more source

Biological 1H NMR spectroscopy

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1988
Proton nuclear magnetic resonance spectroscopy (1H NMR) is a powerful analytical method used to identify and quantitate chemical compounds. In recent years, it has been used to study rates of metabolism in microbes, isolated perfused tissues, intact animals, and human beings.
openaire   +2 more sources