Improved CO2separation performance of Matrimid®5218 membrane by addition of low molecular weight polyethylene glycol

2015 ◽  
Vol 5 (5) ◽  
pp. 530-544 ◽  
Author(s):  
Mahsa Loloei ◽  
Abdolreza Moghadassi ◽  
Mohammadreza Omidkhah ◽  
Abtin Ebadi Amooghin
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Low Molecular Weight

Effects of ultrasonic cavitation on neutralization process of low molecular weight polyethylene glycol

2018 ◽  
Vol 97 (1) ◽  
pp. 395-405 ◽  
Author(s):  
Abbas Azarpour ◽  
Sohrab Zendehboudi ◽  
Suzana Yusup ◽  
Athirah Khalid ◽  
Yahui Zhang
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Ultrasonic Cavitation ◽  
Low Molecular Weight ◽  
Neutralization Process

scholarly journals Research and Application of Polycarboxylic Acid Water Reducer with Different Molecular Weight

2020 ◽  
Vol 179 ◽  
pp. 01021
Author(s):  
Bobo Liu ◽  
Kangjian Yu ◽  
Yinggang Yang ◽  
Donghui Miao ◽  
Chong He
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Reducing Agent ◽  
Acid Water ◽  
Low Molecular Weight ◽  
High Grade ◽  
Polycarboxylic Acid ◽  
Different Molecular Weight

In this paper, a polycarboxylic water reducing agent was synthesized by using Methylallyl polyethylene glycol (HPEG) with molecular weight of 1200, 2400, 2800 and 3400 under the same conditions, C80 concrete tests were performed on these four molecular weight superplasticizers, verify the effect of different molecular weight polycarboxylic acid water reducer in C80 pumping concrete, finally, a kind of low molecular weight polycarboxylic acid water reducer with viscosity reducing effect in high-grade concrete is obtained, which can promote pumping of high-grade concrete.

scholarly journals Polyethylene glycol as marker in piglet diets with a high dry-matter content

1968 ◽  
Vol 22 (3) ◽  
pp. 515-526 ◽  
Author(s):  
M. J. Manners ◽  
D. E. Kidder
Keyword(s):  
Molecular Weight ◽  
Small Intestine ◽  
Polyethylene Glycol ◽  
Dry Matter ◽  
Matter Content ◽  
Low Molecular Weight ◽  
Dry Matter Content ◽  
Casein Diet ◽  
High Dry Matter ◽  
Weight Substance

1. Polyethylene glycol (PEG) of high molecular weight, used as a dietary marker, did not distribute uniformly in the water present in a high-casein diet as did glucose, a low-molecular-weight substance.2. This distribution effect also occurred with the contents of the stomach and, to a smaller extent, with the contents of the first quarter of the small intestine of piglets given such a diet.

The Effects of Polymer Coating of Gold Nanoparticles on Oxidative Stress and DNA Damage

2020 ◽  
Vol 39 (4) ◽  
pp. 328-340
Author(s):  
Gamze Tilbe Sen ◽  
Gizem Ozkemahli ◽  
Reza Shahbazi ◽  
Pınar Erkekoglu ◽  
Kezban Ulubayram ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Molecular Weight ◽  
Dna Damage ◽  
Gold Nanoparticles ◽  
Polyethylene Glycol ◽  
High Molecular Weight ◽  
Hepg2 Cells ◽  
The Body ◽  
Low Molecular Weight ◽  
Antioxidant Parameters

Gold nanoparticles (AuNPs) have been widely used in many biological and biomedical applications. In this regard, their surface modification is of paramount importance in order to increase their cellular uptake, delivery capability, and optimize their distribution inside the body. The aim of this study was to examine the effects of AuNPs on cytotoxicity, oxidant/antioxidant parameters, and DNA damage in HepG2 cells and investigate the potential toxic effects of different surface modifications such as polyethylene glycol (PEG) and polyethyleneimine (PEI; molecular weights of 2,000 (low molecular weight [LMW]) and 25,000 (high molecular weight [HMW]). The study groups were determined as AuNPs, PEG-coated AuNPs (AuNPs/PEG), low-molecular weight polyethyleneimine-coated gold nanoparticles (AuNPs/PEI LMW), and high-molecular weight polyethyleneimine-coated gold nanoparticles (AuNPs/PEI HMW). After incubating HepG2 cells with different concentrations of nanoparticles for 24 hours, half maximal inhibitory concentrations (the concentration that kills 50% of the cells) were determined as 166.77, 257.73, and 198.44 µg/mL for AuNPs, AuNPs/PEG, and AuNPs/PEI LMW groups, respectively. Later, inhibitory concentration 30 (IC30, the concentration that kills 30% of the cells) doses were calculated, and further experiments were performed on cells that were exposed to IC30 doses. Although intracellular reactive oxygen species levels significantly increased in all nanoparticles, AuNPs as well as AuNPs/PEG did not cause any changes in oxidant/antioxidant parameters. However, AuNPs/PEI HMW particularly induced oxidative stress as evidence of alterations in lipid peroxidation and protein oxidation. These results suggest that at IC30 doses, AuNPs do not affect oxidative stress and DNA damage significantly. Polyethylene glycol coating does not have an impact on toxicity, however PEI coating (particularly HMW) can induce oxidative stress.

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