نتایج جستجو برای: microwave heating ethylene glycol

تعداد نتایج: 145662  

Journal: :Organic & biomolecular chemistry 2016
Yong-Jay Lee Tsung-Hsien Ho Chien-Chen Lai Sheng-Hsien Chiu

An investigation into the most suitable alkali metal ions for templating the assembly of [2]catenanes from di-, tri-, and tetra(ethylene glycol)-containing guest diamines and isophthalaldehyde has indicated that Na(+), K(+), and Rb(+) ions are optimal for preparing [2]catenanes containing at least one di(ethylene glycol) unit, two tri(ethylene glycol) units, and at least one tetra(ethylene glyc...

Journal: :Physical review letters 2005
Toshiko Fukasawa Takaaki Sato Junji Watanabe Yoshimasa Hama Werner Kunz Richard Buchner

We analyzed the complex dielectric and Raman spectra of hydrogen-bond liquids in the microwave to terahertz frequency range. As for water and methanol, the high-frequency component of the dielectric spectrum, i.e., the small deviation from the principal Debye relaxation, clearly corresponds to the Raman spectrum. This indicates that the cooperative relaxation, accompanied by huge polarization f...

1999
Gunnar Johanson Staffan Marklund Ewa Wigaeus Hjelm Johan Högberg Johan Montelius

The labour market, occupational safety and health, and work organisation are our main fields of activity. The creation and use of knowledge through learning, information and documentation are important to the Institute, as is international cooperation. The Institute is collaborating with interested parties in various development projects. The areas in which the Institute is active include: • la...

Background: Ethylene glycol is a toxic alcohol which is used in brake fluid, antifreeze, coolants, preservatives and chemical solvents. Ethylene glycol poisoning usually results in depression of the central nervous system, renal insufficiency and cardiopulmonary compromise, while laboratory findings include metabolic acidosis, increased anion gap, increased osmolar gap and calcium oxalate cryst...

Traditionally water-ethylene glycol mixture based nanofluids are used in cold regions as a coolant in the car radiators. In the present study, the rheological properties of water-ethylene glycol based graphene oxide nanofluid are studied using Non-Equilibrium Molecular Dynamics (NEMD) method at different temperatures, volume concentrations, and shear rates. NEMD simulations are perfor...

Journal: :Applied and environmental microbiology 1981
W H Caskey W A Taber

Bacterium T-52, cultured on ethylene glycol, readily oxidized glycolate and glyoxylate and exhibited elevated activities of ethylene glycol dehydrogenase and glycolate oxidase. Labeled glyoxylate was identified in reaction mixtures containing [C]-ethylene glycol, but no glycolate was detected. The most likely pathway of ethylene glycol catabolism by bacterium T-52 is sequential oxidation to gly...

2015
Bai-Liang Xue Jia-Long Wen Run-Cang Sun

Lignin-based polyols were synthesized through microwave-assisted liquefaction under different microwave heating times (5-30 min). The liquefaction reactions were carried out using polyethylene glycol (PEG-400)/glycerol as liquefying solvents and 97 wt% sulfur acid as a catalyst at 140 °C. The polyols obtained were analyzed for their yield, composition and structural characteristics using gel pe...

Poly (ether-block-amide) /poly (ethylene glycol)/ carbon nanotubes mixed matrix membranes have been successfully fabricated using solvent evaporation method to determine the effect of ethylene oxide groups on the performance of produced membranes. The effects of CNTs (2-8 wt%) and PEG (up to 50 wt%)were investigated in both single and mixed gas test setup in different temperature and pressure. ...

2016
Yun Guo Zhixiong Guo

The present paper characterizes ethylene glycol flow and heat transfer inside a new diversion-type gas heating device. A two-dimensional (2-D) natural convection heat transfer model was built and solved by the finite volume method with unstructured body-fitted grids. The numerical model was first validated through temperature comparison with the experimental measurements in a conventional devic...

2012
Manuel Ocana Sonia Rodriguez-Liviano Francisco J Aparicio Ana Isabel Becerro Jorge García-Sevillano Eugenio Cantelar Sara Rivera Yulán Hernández Jesus M de la Fuente Francisco J. Aparicio Ana I. Becerro Jesus M. de la Fuente Manuel Ocaña

Monoclinic Tb:CePO4 nanophosphors with a spindle-like morphology and tailored size have been prepared though a very simple procedure, which consists of aging, at low temperature (120oC), ethylene glycol solutions containing only cerium and terbium acetylacetonates and phosphoric acid, not requiring the addition of surfactants or capping agents. The influence of the heating mode (conventional co...

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