Results 111 to 120 of about 12,878 (240)

Polyimides comprising substituted benzidines [PDF]

, 1991
A new class of polyimides and copolyimides made from substituted benzidines and aromatic dianhydrides and other aromatic diamines. The polyimides obtained with said diamines are distinguished by excellent thermal, excellent solubility, excellent ...
Harris, Frank W.
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SOLVATOCHROMISM OF ASYMMETRICAL SUBSTITUTED 3,7-DIAMINOPHENOTHIAZINIUM DYE

Studia Universitatis Babes-Bolyai Chemia, 2015
A convenient procedure for the synthesis of 3-diethylamino-7-phenylaminophenothiazin-5-ium iodide was developed and the solvatochromism of this blue dye was examined by means of UV-Vis spectroscopy.
Camelia CIOBOTARIU, Lucian Cornel POP, Dan Ioan PORUMB   +2 more
doaj  

Electrochemical Corrosion Monitoring in Low Conductive Fluid: Pilot-Scale Study on Sulfolane Corrosion Potential

Proceedings, 2019
Solvents are a group of chemical compounds that are widely used in organic synthesis. Taking into account the chemical nature, solvents are divided into protic and aprotic ones.
Aleksandra Świetlicka, Agnieszka Środa, Violetta Kozik, Andrzej Bąk, Krzysztof Barbusiński, Natalia Howaniec, Adam Smoliński   +6 more
doaj   +1 more source

Microwave-assisted extraction of Garcinia × mangostana L. and its ‘Mesta’ cultivar rinds: Physicochemical and antioxidant properties analyzed using multiple chemometric algorithms

Food Chemistry Advances
Mangosteen rind is an underutilized by-product rich in bioactive compounds. This study assessed the effect of microwave-assisted extraction (MAE) using different protic and aprotic solvents on the rinds of common mangosteen (Garcinia × mangostana L.) and
Peir Shinn Hew, Wen Jie Ng, Pei Jun Loh, Jiayang Ching, Kah Yaw Ee   +4 more
doaj   +1 more source

A novel DHP-NH2 fluorescent dye for the determination of water content in organic solvents, rice, and aspirin: DFT calculations

Sensors International
A novel aminodihydropyridine derivative (DHP-NH2) was synthesized from hydrazine via a tandem cyclotrimerization of methyl propiolate. DHP-NH2 distinguishably exhibited either strong fluorescence in aprotic solvents or weak fluorescence in protic ...
Kittiporn Nakprasit, Panyakorn Taweechat, Pornthep Sompornpisut, Mongkol Sukwattanasinitt, Waroton Paisuwan, Anawat Ajavakom   +5 more
doaj   +1 more source

Development of radiosynthesis methods for 18F-labelled radiopharmaceuticals : General considerations and production of a dopamine transporter radioligand [PDF]

, 2011
Positron emission tomography (PET) is a molecular imaging technique that utilises radiopharmaceuticals (radiotracers) labelled with a positron-emitting radionuclide, such as fluorine-18 (18F).
Koivula, Teija
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Molecular structural, vibrational spectra, dual descriptor, electronic transition and biological evaluations of ethyl 4‑hydroxy-3-methoxycinnamate using density functional theory

Chemical Physics Impact
Quantum chemical, spectroscopic and bioactivity studies of pharmacologically active Ethyl 4‑hydroxy 3‑methoxy ethyl cinnamate (EHMC) were investigated.
G. Bharathy, Johanan Christian Prasana, V.S. Jeba Reeda, M. Prasath, A. Manikandan   +4 more
doaj   +1 more source

Synthesis, crystal structure and physico-chemical properties of 3,3’-[(4-hydroxyphenyl)methyl] bis-(4-hydroxy-2H-chromen-2-one)

Acta Chimica Slovenica, 2014
The compound 3,3’-[(4-Hydroxyphenyl)methyl]bis-(4-hydroxy-2H-chromen-2-one) was synthesized by the Knoevenagel reaction. Crystals, suitable for X-ray data collection were grown by slow evaporation from an ethanol solution.
Denitsa Elenkova, Bernd Morgenstern, Ilia Manolov, Maria Milanova   +3 more
doaj  

Acrylamide Production Using Encapsulated Nitrile Hydratase from \u3cem\u3ePseudonocardia thermophila\u3c/em\u3e in a Sol–gel Matrix [PDF]

, 2014
The cobalt-type nitrile hydratase from Pseudonocardia thermophila JCM 3095 (PtNHase) was successfully encapsulated in tetramethyl orthosilicate sol–gel matrices to produce a PtNHase:sol–gel biomaterial.
Elgren, Timothy E., Holz, Richard C., Kuhn, Misty L., Martinez, Salette, Russell, James T.   +4 more
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Effect of Solvent on Azo-Hydrazonetautomerism of 2-Hydroxy-5-(4-Nitrophenylazo) Benzaldehyde [PDF]

, 2015
Azo dye has been synthesized having Donor-p-Acceptor (D-p-A) system to study the effect of solvent on the azo-hydrazone tautomerism. The relative stabilities of azo and hydrazone tautomer are examined by means of UV-Vis spectroscopic technique and are ...
Patel, Ranjita, Sahoo, Soubhagyabati
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