Results 31 to 40 of about 267,493 (300)

5-Hydroxy-3-(4-hydroxyphenyl)-8,8-dimethyl-6- (3-methylbut-2-enyl)pyrano[2,3-h]chromen-4-one [PDF]

, 2018
Natural and semi-synthetic compounds are being studied as novel phosphodiesterase 5 (PDE5) inhibitors for the treatment of erectile dysfunction, pulmonary hypertension, and lower urinary symptoms.
Ongaro, Alberto, Ribaudo, Giovanni, Zagotto, Giuseppe   +2 more
core   +1 more source

Insights into DNA platination within unusual structural settings [PDF]

, 2011
2D [1H, 15N] HSQC NMR spectroscopy has been used to monitor reaction and product formation between [Pt(15NH3)2I2] and nucleic acids possessing irregular topologies and containing site specific phosphorothioate substitution in the phosphodiester backbone.
Harvie, Stephanie, Parkinson, John A, Wilson, Owen   +2 more
core   +2 more sources

Effect of the Internal Magnetic Field Gradient on Two Dimensional NMR Responses in Volcanic Rock

Cejing jishu
Two dimensional (2D) nuclear magnetic resonance (NMR) technology can provide two kinds of relaxation information simultaneously, which has significant advantages in fluid identification and quantitative evaluation. There are rich paramagnetic minerals in
CUI Shitao, ZHAO Yongjie, XIAO Fei, WANG Lei, HUANG Ke, REN Yawen, GUO Jiangfeng   +6 more
doaj   +1 more source

Intrinsic susceptibility and bond defects in the novel 2D frustrated antiferromagnet Ba$_{2}$Sn$_{2}$ZnCr$_{7p}$Ga$_{10-7p}$O$_{22}$ [PDF]

, 2004
We present microscopic and macroscopic magnetic properties of the highly frustrated antiferromagnet Ba$_{2}$Sn$_{2}$ZnCr$_{7p}$Ga$_{10-7p}$O$_{22}$, respectively probed with NMR and SQUID experiments.
A. J. García-Adeva, A. P. Ramirez, C. Lhuillier, C. Mondelli, D. Bono, G. Collin, M. Mambrini, N. Blanchard, P. Mendels, P. W. Anderson   +9 more
core   +5 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

Study of electron spin dynamics in grain aligned LaCoPO: an itinerant ferromagnet

, 2010
139La NMR study was performed in grain aligned (c|| H0) sample of LaCoPO and polycrystalline LaFePO. Knight shift is isotropic and temperature independent in LaFePO. It is strongly temperature dependent and anisotropic in LaCoPO.
A. Ghoshray, B. Bandyopadhyay, G. C. Carter, K. Ghoshray, M. Ghosh, M. H. Cohen, M. Majumder, T. Moriya   +7 more
core   +1 more source

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

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

An ¹H NMR- and MS-Based Study of Metabolites Profiling of Garden Snail Helix aspersa Mucus

Metabolites, 2020
Metabolic profiling based on 1H nuclear magnetic resonance (NMR) spectroscopy was applied with the aim to investigate the functional role of the metabolites in lyophilized mucus from the garden snail Helix aspersa.
Nikolay G. Vassilev, Svetlana D. Simova, Miroslav Dangalov, Lyudmila Velkova, Venceslav Atanasov, Aleksandar Dolashki, Pavlinka Dolashka   +6 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