Effect of Gamma Radiation on the Adsorption Capacity and Regeneration / Desorption of Sulphate and Phosphate Ions Using Smart Hydrogel.

Abstract Co-polymeric hydrogels containing poly (Acrylamide /Epichlorohydrine) P(AAm/EPI) with different acrylamide and Epichlorohydrine content were fabricated by gamma radiation at different irradiation doses as adsorbent materials for wastewater treatment. The mechanisms of radiation-induced crosslinking of hydrogel in aqueous solution has been evaluated. The gel contents and the swelling/diffusion kinetic parameters were evaluated at different irradiation doses, and the result confirm a non-fichian mechanism. The shape, surface morphology, and porosity of P (AAm/ Epi) hydrogel were characterized by scanning electron microscope (SEM). Adsorption experiments were carried out for the removal of sulphate and phosphate ions from wastewater using P(AAm/EPI) hydrogels as adsorbent materials. The isotherm data were analyzed by Freundlich equation. The equilibrium isotherm results show a better fitting (R2 > 0.9) to the Freundlich model for all anions. The calculated regeneration efficiency (%) values of sulphate and phosphate ions found to be ranged between 63.2 (%) and 46 (%).The relatively higher regeneration efficiency (%) and keeping the hydrogels its shape without any deformation promising to use the same hydrogels further times which decrease the economic cost.

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Gamma Radiation Induced Effects on Cefuroxime and Cefotaxime. Investigation on Degradation and Syn-Anti Isomerization

Drug Development and Industrial Pharmacy ◽

10.3109/03639049409042653 ◽

1994 ◽

Vol 20 (16) ◽

pp. 2493-2508 ◽

Cited By ~ 21

Author(s):

E. Ciranni Signoretti ◽

L. Valvo ◽

P. Fattibene ◽

S. Onori ◽

M. Pantaloni

Keyword(s):

Gamma Radiation ◽

Radiation Induced

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Gamma Radiation Induced Microwave Absorption Properties of Ultra-thin Barium Titanate (BaTiO3) Ceramic Tiles over X-Band (8.2-12.4 GHz)

Ceramics International ◽

10.1016/j.ceramint.2021.04.249 ◽

2021 ◽

Author(s):

Lokesh Saini ◽

Raj Kumar Jani ◽

Yojana Janu ◽

Manish Kumar ◽

Manoj Kumar Patra ◽

...

Keyword(s):

Barium Titanate ◽

Gamma Radiation ◽

Microwave Absorption ◽

Batio3 Ceramic ◽

Ceramic Tiles ◽

Absorption Properties ◽

Microwave Absorption Properties ◽

X Band ◽

Radiation Induced

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A DNA-Damage-Induced Cell Cycle Checkpoint in Arabidopsis

Genetics ◽

10.1093/genetics/164.1.323 ◽

2003 ◽

Vol 164 (1) ◽

pp. 323-334

Author(s):

S B Preuss ◽

A B Britt

Keyword(s):

Cell Cycle ◽

Gamma Radiation ◽

Cell Cycle Progression ◽

Cell Cycle Checkpoint ◽

Phase Cell ◽

Cycle Arrest ◽

Cycle Checkpoint ◽

Radiation Induced ◽

High Doses ◽

Regulation Of Cell Cycle

Abstract Although it is well established that plant seeds treated with high doses of gamma radiation arrest development as seedlings, the cause of this arrest is unknown. The uvh1 mutant of Arabidopsis is defective in a homolog of the human repair endonuclease XPF, and uvh1 mutants are sensitive to both the toxic effects of UV and the cytostatic effects of gamma radiation. Here we find that gamma irradiation of uvh1 plants specifically triggers a G2-phase cell cycle arrest. Mutants, termed suppressor of gamma (sog), that suppress this radiation-induced arrest and proceed through the cell cycle unimpeded were recovered in the uvh1 background; the resulting irradiated plants are genetically unstable. The sog mutations fall into two complementation groups. They are second-site suppressors of the uvh1 mutant's sensitivity to gamma radiation but do not affect the susceptibility of the plant to UV radiation. In addition to rendering the plants resistant to the growth inhibitory effects of gamma radiation, the sog1 mutation affects the proper development of the pollen tetrad, suggesting that SOG1 might also play a role in the regulation of cell cycle progression during meiosis.

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Smart Hydrogel Bilayers Prepared by Irradiation

Polymers ◽

10.3390/polym13111753 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1753

Author(s):

Weixian Huo ◽

Heng An ◽

Shuquan Chang ◽

Shengsheng Yang ◽

Yin Huang ◽

...

Keyword(s):

Mechanical Properties ◽

Gamma Radiation ◽

Antibacterial Properties ◽

Cross Linking ◽

Temperature Sensitive ◽

Temperature Changes ◽

Smart Hydrogel ◽

Isopropyl Acrylamide ◽

Hydrogel Synthesis ◽

Potential Applications

Environment-responsive hydrogel actuators have attracted tremendous attention due to their intriguing properties. Gamma radiation has been considered as a green cross-linking process for hydrogel synthesis, as toxic cross-linking agents and initiators were not required. In this work, chitosan/agar/P(N-isopropyl acrylamide-co-acrylamide) (CS/agar/P(NIPAM-co-AM)) and CS/agar/Montmorillonite (MMT)/PNIPAM temperature-sensitive hydrogel bilayers were synthesized via gamma radiation at room temperature. The mechanical properties and temperature sensitivity of hydrogels under different agar content and irradiation doses were explored. The enhancement of the mechanical properties of the composite hydrogel can be attributed to the presence of agar and MMT. Due to the different temperature sensitivities provided by the two layers of hydrogel, they can move autonomously and act as a flexible gripper as the temperature changes. Thanks to the antibacterial properties of the hydrogel, their storage time and service life may be improved. The as prepared hydrogel bilayers have potential applications in control devices, soft robots, artificial muscles and other fields.

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