Solubilities of Carbon Dioxide in Polyethylene Glycol Ethers

2008 ◽  
Vol 83 (2) ◽  
pp. 358-361 ◽  
Author(s):  
Amr Henni ◽  
Paitoon Tontiwachwuthikul ◽  
Amit Chakma
Keyword(s):  
Carbon Dioxide ◽  
Polyethylene Glycol ◽  
Glycol Ethers

A One-Step Synthesis of Monoprotected Polyethylene Glycol Ethers

2000 ◽  
Vol 65 (18) ◽  
pp. 5843-5845 ◽  
Author(s):  
Neal N. Reed ◽  
Kim D. Janda
Keyword(s):  
Polyethylene Glycol ◽  
Glycol Ethers ◽  
One Step

Poly(amide-12-b-ethylene oxide)/polyethylene glycol blend membranes for carbon dioxide separation

2013 ◽  
Vol 116 ◽  
pp. 25-34 ◽  
Author(s):  
Shichao Feng ◽  
Jizhong Ren ◽  
Kaisheng Hua ◽  
Hui Li ◽  
Xiaoling Ren ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Polyethylene Glycol ◽  
Ethylene Oxide ◽  
Carbon Dioxide Separation ◽  
Blend Membranes

Polyethylene Glycol Covered Sn Catalysts Accelerate the Formation Rate of Formate by Carbon Dioxide Reduction

ACS Catalysis ◽  
2021 ◽  
pp. 9962-9969
Author(s):  
Samuel Jeong ◽  
Tatsuhiko Ohto ◽  
Tomohiko Nishiuchi ◽  
Yuki Nagata ◽  
Jun-ichi Fujita ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Polyethylene Glycol ◽  
Formation Rate ◽  
Carbon Dioxide Reduction

Polyethylene glycol radical-initiated aerobic propargylic oxidation in dense carbon dioxide

2013 ◽  
Vol 22 (3) ◽  
pp. 363-367 ◽  
Author(s):  
Zhenfeng Diao ◽  
Bin Li ◽  
Bing Yu ◽  
Anhua Liu ◽  
Liangnian He
Keyword(s):  
Carbon Dioxide ◽  
Polyethylene Glycol ◽  
Dense Carbon Dioxide

scholarly journals Metabolism of propane-1:2-diol infused into the rumen of sheep

1972 ◽  
Vol 27 (3) ◽  
pp. 553-560 ◽  
Author(s):  
J. L. Clapperton ◽  
J. W. Czerkawski
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Energy Metabolism ◽  
Heat Production ◽  
Volatile Fatty Acids ◽  
Carbon Dioxide Production ◽  
Total Volatile

1. Propane-1:2-diol (loog/d) was infused through a cannula into the rumen of sheep receiving a ration of hay and dried grass. The concentration of volatile fatty acids, propanediol, lactic acid and of added polyethylene glycol, and the pH of the rumen contents were measured. The energy metabolism of the sheep was also determined.2. Most of the propanediol disappeared from the rumen within 4 h of its infusion. The infusion of propanediol resulted in a 10% decrease in the concentration of total volatile acids; the concentration of acetic acid decreased by about 30%, that of propionic acid increased by up to 60% and there was no change in the concentration of butyric acid.3. The methane production of the sheep decreased by about 9% after the infusion of propanediol and there were increases in the oxgyen consumption, carbon dioxide production and heat production of the animals; each of these increases was equivalent to about 40% of the theoretical value for the complete metabolism of 100 g propanediol.4. It is concluded that, when propanediol is introduced into the rumen, a proportion is metabolized in the rumen and a large proportion is absorbed directly. Our thanks are due to Dr J. H. Moore for helpful discussions, to Mr D. R. Paterson, Mr J. R. McDill and Mr C. E. Park for looking after the animals and to Miss K. M. Graham, Miss A. T. McKay and Mrs C. E. Ramage for performing the analyses.

scholarly journals Formation of Polyethylene Glycol Particles Using a Low-Temperature Supercritical Assisted Atomization Process

Molecules ◽  
2019 ◽  
Vol 24 (12) ◽  
pp. 2235
Author(s):  
Hsien-Tsung Wu ◽  
Hong-Ming Tsai ◽  
Tsung-Hsuan Li
Keyword(s):  
Carbon Dioxide ◽  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Low Temperature ◽  
Flow Rate ◽  
Fine Particles ◽  
Volumetric Flow Rate ◽  
Degree Of Crystallinity ◽  
Scanning Calorimetry ◽  
Rate Ratios

Polyethylene glycol (PEG) particles were prepared using low-temperature supercritical assisted atomization (LTSAA) with carbon dioxide as the spraying medium or the co-solute and acetone as the solvent. The effects of several key factors on the particle size were investigated. These factors included the concentration of the PEG solution, precipitator temperature, saturator temperature, ratio of the volumetric flow rate of carbon dioxide to the PEG solution, and the molecular weight of PEG. Spherical and non-aggregated PEG particles, with a mean size of 1.7–3.2 µm, were obtained in this study. The optimal conditions to produce fine particles were found to be a low concentration of the PEG solution, a low precipitator temperature, and low molecular weight of the PEG. The phase behavior of the solution mixture in the saturator presented a qualitative relationship. At the optimized volumetric flow rate ratios, the composition of CO2 in the feed streams was near the bubble points of the saturator temperatures. X-ray and differential scanning calorimetry analyses indicated that LTSAA-treated PEG had a reduced degree of crystallinity, which could be modulated via the precipitator temperature. PEG microparticles prepared by a LTSAA process would be promising carriers for drug-controlled formulations of PEG-drug composite particles.

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