scholarly journals Ternary liquid – Liquid equilibria for methyl isopropyl ketone + (resorcinol or hydroquinone) + water systems at different temperatures

2016 ◽  
Vol 429 ◽  
pp. 93-97 ◽  
Author(s):  
Yun Chen ◽  
Ran Lv ◽  
Huimin Wang ◽  
Mochen Liao ◽  
Libo Li
Keyword(s):  
Water Systems ◽  
Isopropyl Ketone ◽  
Different Temperatures

Liquid−Liquid Equilibria for Methanol/Ethanol + Rubidium Carbonate + Water Systems at Different Temperatures

2009 ◽  
Vol 54 (10) ◽  
pp. 2866-2870 ◽  
Author(s):  
Mancheng Hu ◽  
Xiang Zhu ◽  
Shu’ni Li ◽  
Quanguo Zhai ◽  
Yucheng Jiang ◽  
...  
Keyword(s):  
Water Systems ◽  
Carbonate Water ◽  
Different Temperatures

Performance of a non-phosphorus antiscalant on inhibition of calcium-sulfate precipitation

2012 ◽  
Vol 66 (1) ◽  
pp. 193-200 ◽  
Author(s):  
Xiaoxu Xue ◽  
Change Fu ◽  
Na Li ◽  
Fangfang Zheng ◽  
Weiben Yang ◽  
...  
Keyword(s):  
Calcium Sulfate ◽  
Water Systems ◽  
Sem Analysis ◽  
Solution Ph ◽  
X Ray ◽  
Thermodynamics And Kinetics ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Different Temperatures ◽  
Strong Ability

The aim of this study is to report on the performance of a novel non-phosphorus antiscalant, acrylic acid (AA)-allylpolyethoxy carboxylate (APEC), being developed for calcium-sulfate scale inhibition in industrial water systems. The performance of AA-APEC on calcium-sulfate scale inhibition was compared with that of the two commercial inhibitors, polyamino polyether methylene phosphonates (PAPEMP) and polyacrylic acid (PAA), containing the same polyethylene glycol segments or carboxyl functional groups as AA-APEC. The study indicated that AA-APEC could act as a highly effective calcium sulfate inhibitor, having strong ability to inhibit the precipitation of calcium sulfate at a dosage of 2 mg L−1, showing approximately 83.6% inhibition. The results also showed that AA-APEC dosage, the solution pH, inhibiting temperature, concentration of Ca2+, and SO42− all play important roles in inhibiting calcium-sulfate precipitation. The precipitation thermodynamics and kinetics at different temperatures were also discussed. X-ray diffractometer (XRD) and scanning electron microscope (SEM) analysis showed that AA-APEC strongly affected the texture and the morphology of the deposited calcium sulfate. Calcium sulfate has been inhibited through stabilization by adsorption onto crystal growth sites of nascent crystals altering their morphology.

Viscosities of ammonium salts in water and ethanol+water systems at different temperatures

2009 ◽  
Vol 146 (3) ◽  
pp. 112-115 ◽  
Author(s):  
Rehana Saeed ◽  
Fahim Uddin ◽  
Summyia Masood ◽  
Nida Asif
Keyword(s):  
Water Systems ◽  
Ammonium Salts ◽  
Different Temperatures

Liquid−Liquid Equilibrium of Poly(ethylene glycol) 6000 + Triammonium Citrate + Water Systems at Different Temperatures

2009 ◽  
Vol 54 (3) ◽  
pp. 1094-1097 ◽  
Author(s):  
Iyyaswami Regupathi ◽  
Shreela Murugesan ◽  
Rajendran Govindarajan ◽  
Samuthira Pandian Amaresh ◽  
Murugesan Thanapalan
Keyword(s):  
Ethylene Glycol ◽  
Water Systems ◽  
Poly Ethylene Glycol ◽  
Liquid Equilibrium ◽  
Different Temperatures ◽  
Poly Ethylene

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

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