Results 11 to 20 of about 2,045,243 (218)

Effect of temperature and alkyl chain length on the physicochemical properties of pyridinium bis(trifluoromethylsulfonyl)imide-based ionic liquids

Chemical Thermodynamics and Thermal Analysis, 2022
Densities, refractive indices, viscosities, surface tensions and speeds of sounds were measured and discussed for [Cnpy][[NTf2] (n=2,4,6) and [Cnmpy][[NTf2] (n=2,3,4) as a function of temperature and atmospheric pressure.
Abdullah Aljasmi, Adel S. AlJimaz, Khaled H.A.E. AlKhaldi, Mohammad S. AlTuwaim   +3 more
doaj   +1 more source

Liquid-Liquid equilibria of ternary mixtures of alkane (C8 or C12) + thiophene + three methylimidazolium dicyanamide (DCA)-based ionic liquids

Chemical Thermodynamics and Thermal Analysis, 2023
It is becoming eminent in the oil refining industry to diminish the sulfur content in their fuels to limit the harmful emissions of sulfur oxides (SOx) to public health and the environment.
Adel F. Alenzi, Khaled H.A.E. Alkhaldi, Adel S. Al-Jimaz, Mohammad S. AlTuwaim   +3 more
doaj   +1 more source

Camptothecins: Some Recent Chemical Studies

Natural Product Communications, 2006
Camptothecin, a novel, naturally-occurring pyrrolo(3,4-b)-quinoline alkaloid, and its analogues (collectively known as camptothecins) possess interesting chemistry and important anticancer and antiviral properties.
Biswanath Das, Maddeboina Krishnaiah, Katta Venkateswarlu, Ratna Das   +3 more
doaj   +1 more source

Synthesis, characterization and biological studies of new linear thermally stable Schiff base polymers with flexible spacers

Acta Chimica Slovenica, 2016
Five new linear Schiff base polymers having azomethine structures, ether linkages and extended aliphatic chain lengths with flexible spacers were synthesized by polycondensation of dialdehyde (monomer) with aliphatic and aromatic diamines.
Farah Qureshi, Muhammad Yar Khuhawar, Taj Muhammad Jahangir, Abdul Hamid Channar   +3 more
doaj   +1 more source

Accessing chiral sulfones bearing quaternary carbon stereocenters via photoinduced radical sulfur dioxide insertion and Truce–Smiles rearrangement

Nature Communications, 2022
The preparation of chiral sulfones featuring quaternary carbon stereocenters remains challenging. Here the authors report the synthesis of such compounds via a multicomponent reaction involving a photoinduced radical sulfur dioxide insertion followed by ...
Jiapian Huang, Fei Liu, Ling-Hui Zeng, Shaoyu Li, Zhiyuan Chen, Jie Wu   +5 more
doaj   +1 more source

Chemical Studies on 3,6-Dichloropyridazine (Part 2)

E-Journal of Chemistry, 2011
3,6-Dichloropyridazine (1) reacted with 2-aminophenol, phenylalanine, acetophenone hydrazone derivatives, acid hydrazide derivatives and amino-aromatic acids (anthranilic acid and 5-bromoanthranilic acid) and yield the compounds (2), (3), (4a,b), (5a,b ...
N. M. Abd El-Salam, Z. Y. Al Shoaibi, G. A. Ahmed   +2 more
doaj   +1 more source

Multiobjective optimization of a gas pipeline network: an ant colony approach

Journal of Petroleum Exploration and Production Technology, 2017
Optimization problems in gas pipeline transportation involve numerous variables, multiple objectives and many complex linear–nonlinear equality and inequality constraints.
Adarsh Kumar Arya, Shrihari Honwad
doaj   +1 more source

Physico-chemical studies of MgNa3P3O10·12H2O

MATEC Web of Conferences, 2013
A magnesium-sodium triphosphate MgNa3P3O10·12H2O already known has been prepared by the method of ion exchange resin of aqueous chemistry and studied by X-Ray diffraction, thermal analyses (TGA-DTA), differential scanning calorimetry (DSC) and infrared ...
Fahim I., Tridane M., Belaaouad S.
doaj   +1 more source

N-glycolyl chondroitin synthesis using metabolically engineered E. coli

AMB Express, 2020
N-glycolyl chondroitin (Gc-CN) is a metabolite of N -glycolylneuraminic acid (Neu5Gc), a sialic acid that is commonly found in mammals, but not humans. Humans can incorporate exogenous Neu5Gc into their tissues from eating red meat.
Adeola E. Awofiranye, Sultan N. Baytas, Ke Xia, Abinaya Badri, Wenqin He, Ajit Varki, Mattheos Koffas, Robert J. Linhardt   +7 more
doaj   +1 more source

Epoxidation of Hybrid Oleic Acid-derived Palm Oil Using an In Situ Performic Acid Mechanism [PDF]

Kemija u Industriji
The purpose of this study was to determine the effects of different types of catalysts – sulphuric acid titanium dioxide, and Amberlite – and to investigate the effect of catalyst loading (0.1 g, 0.5 g, 1.0 g) on the relative conversion to oxirane (RCO %)
Mohd Jumain Jalil, Muhammad Haziq Naqiuddin Ishak, Ismail Md Rasib, Mohd Zulkipli Ab Kadir, Mohamed Noorfazlida, Intan Suhada Azmi   +5 more
doaj   +1 more source