Results 41 to 50 of about 264,992 (304)

A Methodology Study on the Optimal Detection of Oil and Moisture Content in Soybeans Using LF-NMR and Its 2D T₁-T₂ Nuclear Magnetic Technology

Agronomy, 2023
In this study, we aimed to provide an accurate method for the detection of oil and moisture content in soybeans. Introducing two-dimensional low-field nuclear magnetic resonance (LF-2D-NMR) qualitatively solved the problem of overlapping component ...
Yu Zhang, Jianxiang Zhao, Ying Gu, Yu Zhang, Yi Chen, Ping Song, Tao Yang   +6 more
doaj   +1 more source

Unusual polymerization in the Li4C60 fulleride

, 2005
Li4C60, one of the best representatives of lithium intercalated fullerides, features a novel type of 2D polymerization. Extensive investigations, including laboratory x-ray and synchrotron radiation diffraction, 13C NMR, MAS and Raman spectroscopy, show ...
A. Rezzouk, D. Palles, D. Pontiroli, G. Ruani, H. Kuzmany, M. Belli, M. Pagliari, M. Riccò, M. Riccò, M. Tomaselli, S. Margadonna, T. Shiroka   +11 more
core   +1 more source

Uprolides N, O and P from the Panamanian Octocoral Eunicea succinea. [PDF]

, 2016
Three new diterpenes, uprolide N (1), uprolide O (2), uprolide P (3) and a known one, dolabellane (4), were isolated from the CH₂Cl₂-MeOH extract of the gorgonian octocoral Eunicea succinea, collected from Bocas del Toro, on the Caribbean coast of Panama.
Fernandez, Patricia L, Gerwick, William H, González, Yisett, Gutiérrez, Marcelino, Guzmán, Héctor M, Gómez-Reyes, José Félix, López-Perez, José Luis, Torres-Mendoza, Daniel   +7 more
core   +2 more sources

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

Hyperpolarised ¹H–¹³C Benchtop NMR Spectroscopy

Applied Sciences, 2019
Benchtop NMR spectrometers with sub-ppm spectral resolution have opened up new opportunities for performing NMR outside of the standard laboratory environment.
Alastair D. Robinson, Peter M. Richardson, Meghan E. Halse   +2 more
doaj   +1 more source

Steroidi i poliketidi iz kore biljke Uvaria hamiltonii [PDF]

, 2004
Two known steroids, stigmasterol and 6beta-hydroxystigmasta-4,22-dien-3-one (1) and two unusual polyketides, cis-4-hydroxymellein (2) and trans-4-hydroxymellein (3) were isolated from the stem bark of Uvaria hamiltonii.
CHOUDHURY M. HASAN, KAMRUN NAHAR ASHA, MOHAMMAD A. RASHID, RASHEDUZZAMAN CHOWDHURY   +3 more
core   +2 more sources

Spin Susceptibility and Superexchange Interaction in the Antiferromagnet CuO [PDF]

, 2003
Evidence for the quasi one-dimensional (1D) antiferromagnetism of CuO is presented in a framework of Heisenberg model. We have obtained an experimental absolute value of the paramagnetic spin susceptibility of CuO by subtracting the orbital ...
A. Goto, B. Roden, B.T. Collins, B.X. Yang, B.X. Yang, D.C. Johnston, E. Eskes, H. Monien, H. Yasuoka, H. Yokoyama, J. Hay, J. Ziolo, J.B. Forsyth, J.F. Baugher, J.W. Loram, K. Fabricius, K. Kosuge, K. Yoshimura, K.B. Lyons, K.B. Lyons, M. Hidaka, M. Nishi, M. O’Keeffe, M. Takigawa, M. Takigawa, O. Kondo, P. Bourges, P.C. Hammel, P.J. Brown, R.G. Graham, S. Eggert, S. Eggert, S. Shamoto, S. Åsbrink, T. Chattopadhyay, T. Chattopadhyay, T. Matsumoto, T. Shimizu, T. Shimizu, T. Tsuda, T. V. Chandrasekhar Rao, T.V. Chandrasekhar Rao, U. Köbler, W.E. Pickett, X.G. Zheng, X.G. Zheng, Y. Itoh, Y. Mizuno, Y. Okabe   +48 more
core   +1 more source

Dynamic Covalent Synthesis of Crystalline Porous Graphitic Frameworks [PDF]

, 2020
Porous graphitic framework (PGF) is a two-dimensional (2D) material that has emerging energy applications. An archetype contains stacked 2D layers, the structure of which features a fully annulated aromatic skeleton with embedded heteroatoms and periodic
Cai, S, Chan, EM, Chen, H, Ciston, J, Dun, C, Gordon, MP, Li, X, Liu, Y, Liu, Y, Mao, H, Reimer, JA, Sun, B, Tan, T, Urban, JJ, Wang, H, Zhang, J, Zhang, Q, Zheng, H, Zheng, Q   +18 more
core   +2 more sources

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source

C-15 ACETOGENINS FROM THE MARINE ALGA Chondria

Indonesian Journal of Chemistry, 2010
(-) Z-Pinnatifidenyne, a novel C-15 acetogenin has been isolated along with the known compound (+)-3Z,6R,7R-obtusenyne and (+) (3Z)-laurenyne from the Australian red alga Chondria armata.
Antonius R.B. Ola, Bruce F. Bowden
doaj   +1 more source