|
1
|
Li M, Zhang S, Cui S, Qin K, Zhang Y, Li P, Cao Q, Xiao H, Zeng Q. Pre-grafting effect on improving adsorption efficiency of cellulose based biosorbent for Hg (II) removal from aqueous solution. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119493] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
|
2
|
Molnar K, Varga R, Jozsa B, Barczikai D, Krisch E, Nagy KS, Varga G, Jedlovszky-Hajdu A, Puskas JE. Investigation of the Cytotoxicity of Electrospun Polysuccinimide-Based Fiber Mats. Polymers (Basel) 2020; 12:E2324. [PMID: 33050638 PMCID: PMC7601339 DOI: 10.3390/polym12102324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/07/2020] [Accepted: 10/09/2020] [Indexed: 11/16/2022] Open
Abstract
This study investigated cell viability in the presence of allylamine-modified and plasma-treated electrospun polysuccinimide fiber mats (PSI-AAmp). Low pressure non-equilibrium plasma was used for crosslinking the PSI-AAm. Comparison of FTIR and XPS analyses demonstrated that crosslinking occurred on the surface of the samples. Cell viability was investigated using the MG-63 osteosarcoma cell line and WST-1 viability reagent. Since PSI hydrolyzes to poly(aspartic acid) (PASP), PASP was used in addition to the regular controls (cells only). Phase contrast showed normal morphology in all cases at 24 h; however, in the presence of PSI-AAmp at 72 h, some rounded, dead cells could also be seen, and proliferation was inhibited. Since proliferation in the presence of PASP alone was not inhibited, the cause of inhibition was not the final product of the hydrolysis. Further investigations will be carried out to pinpoint the cause.
Collapse
Affiliation(s)
- Kristof Molnar
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
- Department of Food, Agricultural and Biological Engineering, College of Food, Agricultural, and Environmental Sciences, The Ohio State University, 222 FABE, 1680 Madison Avenue, Wooster, OH 44691, USA;
| | - Rita Varga
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
| | - Benjamin Jozsa
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
| | - Dora Barczikai
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
| | - Eniko Krisch
- Department of Food, Agricultural and Biological Engineering, College of Food, Agricultural, and Environmental Sciences, The Ohio State University, 222 FABE, 1680 Madison Avenue, Wooster, OH 44691, USA;
| | - Krisztina S. Nagy
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
- Department of Oral Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary;
| | - Gabor Varga
- Department of Oral Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary;
| | - Angela Jedlovszky-Hajdu
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvarad ter 4, H-1089 Budapest, Hungary; (K.M.); (R.V.); (B.J.); (D.B.); (K.S.N.)
| | - Judit E. Puskas
- Department of Food, Agricultural and Biological Engineering, College of Food, Agricultural, and Environmental Sciences, The Ohio State University, 222 FABE, 1680 Madison Avenue, Wooster, OH 44691, USA;
| |
Collapse
|
|
3
|
Rosado D, Meléndez-Ortiz HI, Ortega A, Gallardo-Vega C, Burillo G. Modification of poly(tetrafluoroethylene) with polyallylamine by gamma radiation. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108766] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
|
4
|
Synthesis and Modification by Carbonization of Styrene-Ethylene Glycol Dimethacrylate-Lignin Sorbents and their Sorption of Acetylsalicylic Acid. MATERIALS 2020; 13:ma13071761. [PMID: 32283784 PMCID: PMC7178683 DOI: 10.3390/ma13071761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 11/17/2022]
Abstract
This paper deals with the synthesis and studies of new polymer microspheres properties based on ethylene glycol dimethylacrylate (EGDMA), styrene (St), and various quantities of commercial kraft lignin (L). In the first stage of the investigations, the conditions of the synthesis process were optimized by selecting a proper amount of poly (vinyl alcohol), which was a suspension stabilizer. Next, based on EGDMA + St + L, new polymers were synthesized by the suspension polymerization method. The chemical structure of the materials was confirmed by means of the Attenuated Total Reflectance—Fourier Transform Infrared (ATR-FTIR) analysis. The evaluation of the synthesized materials includes susceptibility to swelling in solvents of different character (polar and nonpolar), porous structure of microspheres, and their thermal resistance. Morphology has been specified by the scanning electron microscope and automated particle size, as well as shape analyzer. The obtained pictures confirmed the spherical shape of the materials. The microspheres porosity was characterized using the low-temperature nitrogen adsorption. To increase the porosity (partially blocked by the large lignin molecule), the microspheres (EGDMA + St + 4L copolymer) were impregnated with the aqueous solution of the activating substance (sulphuric acid, nitric acid, phosphorous acid, and silver nitrate) and then carbonized at 400 °C. After the carbonization process, the increase in the specific surface area was observed. The microspheres were porous with a specific surface area up to 300 m2/g. The materials had a desirable feature for their potential use in chromatography, which was confirmed by the results of GC analysis with the acetylsalicylic acid. These materials are an interesting alternative in the field of more environmentally friendly, ecological, and biodegradable polymeric sorbents in comparison to the commonly applied styrene-divinylbenzene (St-DVB) copolymers.
Collapse
|