Influence of sterilization conditions on sulfate-functionalized polyGGE

2021 ◽  
pp. 1-12
Author(s):  
Shuo Zhou ◽  
Xun Xu ◽  
Nan Ma ◽  
Friedrich Jung ◽  
Andreas Lendlein
Keyword(s):  
Microbial Contamination ◽  
Gamma Ray ◽  
Glycidyl Ether ◽  
Biological Processes ◽  
Chain Mobility ◽  
Functionalized Materials ◽  
Polymeric Implants ◽  
Gamma Ray Irradiation ◽  
Group Density ◽  
Living Organisms

Sulfated biomolecules are known to influence numerous biological processes in all living organisms. Particularly, they contribute to prevent and inhibit the hypercoagulation condition. The failure of polymeric implants and blood contacting devices is often related to hypercoagulation and microbial contamination. Here, bioactive sulfated biomacromolecules are mimicked by sulfation of poly(glycerol glycidyl ether) (polyGGE) films. Autoclaving, gamma-ray irradiation and ethylene oxide (EtO) gas sterilization techniques were applied to functionalized materials. The sulfate group density and hydrophilicity of sulfated polymers were decreased while chain mobility and thermal degradation were enhanced post autoclaving when compared to those after EtO sterilization. These results suggest that a quality control after sterilization is mandatory to ensure the amount and functionality of functionalized groups are retained.

Stability of non-proteinogenic amino acids to UV and gamma irradiation

2018 ◽  
Vol 18 (05) ◽  
pp. 426-435 ◽  
Author(s):  
Laura Rowe ◽  
Julie Peller ◽  
Claire Mammoser ◽  
Kelly Davidson ◽  
Amy Gunter ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance ◽  
Gamma Ray ◽  
Uv Light ◽  
Fundamental Property ◽  
Environmental Pressures ◽  
Gamma Ray Irradiation ◽  
Living Organisms ◽  
The Stability ◽  
Almost All

AbstractAlmost all living organisms on Earth utilize the same 20 amino acids to build their millions of different proteins, even though there are hundreds of amino acids naturally occurring on Earth. Although it is likely that both the prebiotic and the current environment of Earth shaped the selection of these 20 proteinogenic amino acids, environmental conditions on extraterrestrial planets and moons are known to be quite different than those on Earth. In particular, the surfaces of planets and moons such as Mars, Europa and Enceladus have a much greater flux of UV and gamma radiation impacting their surface than that of Earth. Thus, if life were to have evolved extraterrestrially, a different lexicon of amino acids may have been selected due to different environmental pressures, such as higher radiation exposure. One fundamental property an amino acid must have in order to be of use to the evolution of life is relative stability. Therefore, we studied the stability of three different proteinogenic amino acids (tyrosine, phenylalanine and tryptophan) as compared with 20 non-proteinogenic amino acids that were structurally similar to the aromatic proteinogenic amino acids, following ultraviolet (UV) light (254, 302, or 365 nm) and gamma-ray irradiation. The degree of degradation of the amino acids was quantified using an ultra-high performance liquid chromatography-mass spectrometer (UPLC-MS). The result showed that many non-proteinogenic amino acids had either equal or increased stability to certain radiation wavelengths as compared with their proteinogenic counterparts, with fluorinated phenylalanine and tryptophan derivatives, in particular, exhibiting enhanced stability as compared with proteinogenic phenylalanine and tryptophan amino acids following gamma and select UV irradiation.

Environmental significance of atrazine in aqueous systems and its removal by biological processes: an overview

2013 ◽  
Vol 8 (2) ◽  
pp. 159-178 ◽  
Keyword(s):  
Drinking Water ◽  
Ground Water ◽  
Water Environment ◽  
Biological Processes ◽  
Biological Degradation ◽  
Environmental Significance ◽  
Carbon And Nitrogen ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Living Organisms

Atrazine, a chlorinated s-triazine group of herbicide is one of the most widely used pesticides in the World. Due to its extensive use, long half-life and various toxic properties, it has very high environmental significance. Up to 22 mg l-1 of atrazine was found in ground water whereas permissible limit of atrazine is in ppb level in drinking water. As per Indian standard there should not be any pesticide present in drinking water. Among many other treatment processes available, Incineration, adsorption, chemical treatment, phytoremediation and biodegradation are the most commonly used ones. Biological degradation of atrazine depends upon various factors like the operating environment, external carbon and nitrogen sources, carbon/ nitrogen ratio (C/N), water content and the bacterial strain. Although, general atrazine degradation pathways are available, the specific pathways in specific conditions are not yet clearly defined. In this paper extensive review has been made on the occurrence of atrazine in surface and ground water bodies, probable sources and causes of its occurrence in water environment, the toxicity of atrazine on various living organisms and its removal by biological processes.

Water-rock reactions during gamma-ray irradiation

1996 ◽  
Vol 11 (3) ◽  
pp. 461-469 ◽  
Author(s):  
C YONEZAWA ◽  
T TANAKA ◽  
H KAMIOKA
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Irradiation

scholarly journals EFFECT OF GAMMA RAY IRRADIATION AND FRYING ON THE THIAMINE CONTENT OF BACON

1989 ◽  
Vol 12 (2) ◽  
pp. 115-134 ◽  
Author(s):  
DONALD W. THAYER ◽  
JAMES J. SHIEH ◽  
RONALD K. JENKINS ◽  
JOHN G. PHILLIPS ◽  
EUGEN WIERBICKI ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Thiamine Content ◽  
Gamma Ray Irradiation

Magnetic separation of amino acids by gold/iron-oxide composite nanoparticles synthesized by gamma-ray irradiation

2005 ◽  
Vol 293 (1) ◽  
pp. 106-110 ◽  
Author(s):  
Takuya Kinoshita ◽  
Satoshi Seino ◽  
Yoshiteru Mizukoshi ◽  
Yohei Otome ◽  
Takashi Nakagawa ◽  
...  
Keyword(s):  
Amino Acids ◽  
Iron Oxide ◽  
Magnetic Separation ◽  
Gamma Ray ◽  
Composite Nanoparticles ◽  
Oxide Composite ◽  
Gamma Ray Irradiation

One-step synthesis of well-dispersed polypyrrole copolymers under gamma-ray irradiation

2021 ◽  
Vol 12 (5) ◽  
pp. 645-649
Author(s):  
Yu Gu ◽  
Yuqing Qiao ◽  
Yusen Meng ◽  
Ming Yu ◽  
Bowu Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gamma Ray ◽  
Gamma Ray Irradiation ◽  
One Step ◽  
First Time

Herein, we report for the first time the synthesis of polypyrrole copolymers with good solvent-dispersibility under gamma-ray irradiation at room temperature in air.

Sign in / Sign up

Export Citation Format

Share Document