Results 61 to 70 of about 140,285 (306)

Analysis and Application of Fluid Components in High-Clay Matrix Shale Oil: A Case Study of Gulong Shale Oil

Energies
Fluid components in cores are crucial parameters in evaluating the quality of a shale reservoir in both laboratory analyses and log interpretation. In the Gulong area, shale reservoirs are characterized by a high clay content, with clay spaces hosting ...
Fujing Sun, Jianmeng Sun, Min Wang, Peng Chi   +3 more
doaj   +1 more source

Stereochemistry of 16a-Hydroxyfriedelin and 3-Oxo-16-methylfriedel-16-ene Established by 2D NMR Spectroscopy

Molecules, 2009
Friedelin (1), 3b-friedelinol (2), 28-hydroxyfriedelin (3), 16a-hydroxyfriedelin (4), 30-hydroxyfriedelin (5) and 16a,28-dihydroxyfriedelin (6) were isolated through fractionation of the hexane extract obtained from branches of Salacia elliptica. After a
Vagner Fernandes Knupp, Sidney Augusto Vieira Filho, Grácia Divina de Fátima Silva, Salomão Bento Vasconcelos Rodrigues Rodrigues, Lucienir Pains Duarte, Roqueline Rodrigues Silva de Miranda   +5 more
doaj   +1 more source

NMR studies of fluoropolymers and of polyaniline [PDF]

, 1998
This thesis presents a study of two polymers, poly(trifluoroethylene) (PTrFE) and polyaniline (PANi), by means of Nuclear Magnetic Resonance Spectroscopy (NMR).The first part of the thesis focusses on investigations in connection with the fluoro polymer.
Reinsberg, Stefan A.
core  

Complex Formation and Light Activation in Membrane-Embedded Sensory Rhodopsin II as Seen by Solid-State NMR Spectroscopy

, 2010
Microbial rhodopsinsexecutediverse biological functions in the cellular membrane. A mechanistic understanding of their functional profile is, however, still limited.
Li, Lin, Geyer, Matthias, Etzkorn, M., Etzkorn, Manuel, Seidel, Karsten, Sub NMR Spectroscopy, Geyer, M., Engelhard, Martin, Martell, Swetlana, Baldus, Marc, NMR Spectroscopy, Baldus, M., Seidel, K., Engelhard, M., Martell, S., Li, L.   +15 more
core   +1 more source

Layer-by-Layer Structural Identification of 2D Ruddlesden-Popper Hybrid Lead Iodide Perovskites by Solid-State NMR Spectroscopy

, 2020
Application of two-dimensional (2D) organic-inorganic hybrid halide perovskites for optoelectronic devices requires detailed understanding of the local structural features including the Pb-I bonding in the 2D layers and the capping ligand-perovskite ...
Jeongjae, Lee, Takhee, Lee, Keehoon, Kang, Woocheol, Lee, Sung Keun, Lee   +4 more
core   +1 more source

Bio‐Inspired Synthesis of Macroporous Single Crystal Particles as Scattering Agents

Advanced Functional Materials, EarlyView.
A general strategy is presented that delivers unique, single‐crystal microparticles that combine submicron macroporosity and uniform particle shapes. A bioinspired approach is used to occlude three distinct types of additives – polystyrene microspheres, polymer vesicles and amino acids – within calcite single crystals, and subsequent thermal annealing ...
Stephanie E. Foster, Gianni Jacucci, Ouassef Nahi, Thomas Kress, Zabeada Aslam, Stuart Micklethwaite, Alexander N. Kulak, Rik Drummond‐Brydson, Melinda J. Duer, Yi‐Yeoun Kim, Silvia Vignolini, Fiona C. Meldrum   +11 more
wiley   +1 more source

A REVIEW ON 2D NMR SPECTROSCOPY

, 2020
Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one. Types of 2D NMR include correlation spectroscopy (COSY), J spectroscopy, exchange spectroscopy (EXSY), and nuclear Overhauser effect ...
openaire   +2 more sources

13C-direct detected NMR experiments for the sequential J-based resonance assignment of RNA oligonucleotides

, 2010
We present here a set of 13C-direct detected NMR experiments to facilitate the resonance assignment of RNA oligonucleotides. Three experiments have been developed: (1) the (H)CC-TOCSY-experiment utilizing a virtual decoupling scheme to assign the ...
Helena Kovacs, Christian Richter, Anna Wacker, Buck, Janina, Kovacs, Helena, Wolfgang Bermel, Wacker, Anna, Harald Schwalbe, Bermel, Wolfgang, Boris Fürtig, Fürtig, Boris, Schwalbe, Harald (Prof. Dr.), Richter, Christian, Janina Buck   +13 more
core   +1 more source

Shape Memory Microneedle to Prevent Risks of Reproductive Hormone Therapy by Switching Sustained to Burst Release Under a Single Transdermal Insertion

Advanced Functional Materials, EarlyView.
A shape‐memory microneedle system enables reproductive hormone therapy through a single transdermal insertion. The X‐shaped device sustains follicle‐stimulating hormone release for three days, and mild heating restores the O shape to trigger burst human chorionic gonadotropin release.
Sungwoo Cho, Hyunjae Kim, Seung Eun Yu, Sangmin Lee, Ji Youn Lee, Mi‐Lan Kang, Kang Suk Lee, Young Sik Choi, Hak‐Joon Sung   +8 more
wiley   +1 more source

Detection of muconic acid type structures in oxidised lignins using 2D NMR spectroscopy: 10(th) EWLP, Stockholm, Sweden, August 25-28, 2008

, 2009
The identification of muconic acid type structures (MATS) in oxidised lignins employing 2D NMR spectroscopy was carried out. The primary database for MATS detection by single bond (1)H-(13)C (HSQC) and long-range (1)H-(1)H and (1)H-(13)C correlation ...
Evtuguin, DV, Goodfellow, BJ, Rocha, G
core   +1 more source