Results 31 to 40 of about 349,748 (311)

Selenomaltol — Synthesis, Spectroscopy and Theoretical Calculations

HETEROCYCLES, 2008
- Synthesis and structure of the seleno derivative of maltol (selenomaltol) is described. Structural and energetical properties of possible selenomaltol structures have been calculated at the B1LYP/6-311++G(d,p) level. The lowest energies are always predicted for the keto-enol tautomer.
Tejchman, Waldemar, Zborowski, Krzysztof, Łasocha, Wiesław, Proniewicz, Leonard   +3 more
openaire   +2 more sources

Improvement of the Thermal Stability and Aqueous Solubility of Three Matrine Salts Assembled by the Similar Structure Salt Formers

Pharmaceuticals
Matrine (MAT), a natural Chinese herbal medicine, has a unique advantage in the treatment of various chronic diseases. However, its low melting point, low bioavailability, and high dosage restrict its subsequent development into new drugs. In this study,
Yeyang Wang, Baoxi Zhang, Wenwen Wang, Penghui Yuan, Kun Hu, Li Zhang, Dezhi Yang, Yang Lu, Guanhua Du   +8 more
doaj   +1 more source

7-hydroxy-3-(1-hydroxyethyl)-5-methoxy-3-4-dimethylisobenzofuran-a(3H)-one and 4, 8-dihydroxy-6-methoxy-3,4,5-trimethyIisochroman-1-one using MOPAC Software

Davao Research Journal, 2013
A benzofuranone type of compound known as 7-hydroxy-3-(1-hydroxyethyl)-5methoxy-3,4-dimethylisobenzofuran-1 (3H)-one (1) and 4,8-dihydroxy-6-methoxy-3,4,5trimethylisochroman-l-one (2) were studied for the molecular modeling using MOPAC.
Wilanfranco Tayone
doaj   +1 more source

On the calculation of Mössbauer isomer shift [PDF]

, 2007
A quantum chemical computational scheme for the calculation of isomer shift in Mössbauer spectroscopy is suggested. Within the described scheme, the isomer shift is treated as a derivative of the total electronic energy with respect to the radius of a ...
Filatov, Michael,, Filatov, Michael, Michael Filatov   +2 more
core   +1 more source

A Novel Fluorescent Sensor for Fe³⁺ Based on a Quinoline Derivative

Molecules
A new fluorescent sensor for detecting Fe3+ was developed based on chemical modification of the quinoline group. Titration experiments showed that the sensor exhibits high selectivity and sensitivity toward Fe3+, even in complex systems.
Xinru Zhang, Bo Sun, Huan Zhang, Chen Zhou, Qingqing Pan, Yining Wang, Chenyang Zou, Juan Hou, Jing Sun   +8 more
doaj   +1 more source

Therapeutic Apheresis for Intravenous Methylprednisolone‐Refractory Neuromyelitis Optica Spectrum Disorder: Clinical and Radiological Outcomes in a Single‐Center Case Series

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing autoimmune disease of the central nervous system. High‐dose intravenous methylprednisolone (IVMP) is the standard first‐line therapy for acute attacks, although some patients remain refractory.
Wataru Horiguchi, Daisuke Katagiri, Takeyuki Watadani, Shunichi Matsuda, Hiroshi Kaneko, Noritoshi Arai   +5 more
wiley   +1 more source

Rational Design of Atomically Dispersed Metal Site Electrocatalysts for Oxygen Reduction Reaction

Advanced Science, 2023
Future renewable energy supply and a cleaner Earth greatly depend on various crucial catalytic reactions for the society. Atomically dispersed metal site electrocatalysts (ADMSEs) have attracted tremendous research interest and are considered as the next‐
Kechuang Wan, Tiankuo Chu, Bing Li, Pingwen Ming, Cunman Zhang   +4 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Experimental and Theoretical Study on the Synergistic Inhibition Effect of Pyridine Derivatives and Sulfur-Containing Compounds on the Corrosion of Carbon Steel in CO₂-Saturated 3.5 wt.% NaCl Solution

Molecules, 2018
The corrosion inhibition performance of pyridine derivatives (4-methylpyridine and its quaternary ammonium salts) and sulfur-containing compounds (thiourea and mercaptoethanol) with different molar ratios on carbon steel in CO2-saturated 3.5 wt.% NaCl ...
Junlei Tang, Yuxin Hu, Zhongzhi Han, Hu Wang, Yuanqiang Zhu, Yuan Wang, Zhen Nie, Yingying Wang   +7 more
doaj   +1 more source

Theoretical Study of Surrounding Rock Loose Zone Scope Based on Stress Transfer and Work–Energy Relationship Theory

Applied Sciences, 2022
In view of the actual gap between the theoretical solution and the measured value of the range of the surrounding rock loose zone excavated by blasting, the formation process and influencing factors of the surrounding rock loose zone after blasting are ...
Gang Lei, Guanqing Wang, Jianjun Luo, Fucai Hua, Xiaonan Gong   +4 more
doaj   +1 more source