scholarly journals Synthesis and Characterization of Some Quinazoline Derivatives as Potential Antimicrobial Agents under Microwave Irradiation

2007 ◽  
Vol 28 (12) ◽  
pp. 2338-2343 ◽  
Keyword(s):  
Microwave Irradiation ◽  
Antimicrobial Agents ◽  
Synthesis And Characterization ◽  
Quinazoline Derivatives

scholarly journals Synthesis and Characterization of O-Acetyl-chitosan Acetic Ester

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Fangfang Cheng ◽  
Bingbing Wang ◽  
Yanzhi Xia
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Agents ◽  
Deionized Water ◽  
Synthesis And Characterization ◽  
Chitosan Derivative ◽  
Food Preservative ◽  
H Nmr ◽  
Acetic Ester ◽  
Degree Of Acetylation

A novel amphipathic chitosan derivative, O-acetyl-chitosan acetic ester (ACHA), was synthesized by the reaction of chitosan with acetic acid in the presence of thionyl chloride. The physicochemical properties of ACHA were characterized by FTIR, 1H NMR, TGA, and XRD. The yield (Y) of ACHA was 79.4%, and the degree of acetylation (DA) of ACHA was 1.04. Compared to CS, ACHA could be dissolved in many organic solvents, deionized water, and aqueous solution. Our results showed that ACHA exhibited a superior antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. These findings indicated that ACHA was preferable for use as antimicrobial agents in wound healing, food preservative, and tissue engineering.

Microwave Synthesis and Characterization of Nanoscale Lanthanum Cobaltite

2012 ◽  
Vol 476-478 ◽  
pp. 1322-1326
Author(s):  
Xiao Yu Jiang ◽  
Jin Chen ◽  
Wen Zhe Chen
Keyword(s):  
Cyclic Voltammetry ◽  
Steady State ◽  
Microwave Irradiation ◽  
Reaction Order ◽  
Synthesis And Characterization ◽  
Cyclic Voltammogram ◽  
Lanthanum Cobaltite ◽  
Bet Analysis ◽  
Perovskite Type

Nanoscale lanthanum cobaltite with perovskite-type was successfully synthesized by microwave irradiation directly and was characterized by XRD, SEM, XPS and BET analysis. The results show that the size of particle was 18 nm averagely, the surface area to be 31.0 m2 g−1. The electrochemical properties were studied by cyclic voltammetry and steady state polarization. The cyclic voltammogram between 0 and 0.55 V exhibited two pairs of redox peaks prior to the onset of O2 evolution in 1 mol dm−3 KOH. The Tafel slope and the reaction order with respect to concentration of OH− were found to be 60 mV decade−1 and ca. 1, respectively.

Synthesis and Characterization of Amphoteric Xylan-type Hemicelluloses by Microwave Irradiation

2012 ◽  
Vol 60 (7) ◽  
pp. 1695-1702 ◽  
Author(s):  
Xin-Wen Peng ◽  
Jun-Li Ren ◽  
Lin-Xin Zhong ◽  
Run-Cang Sun
Keyword(s):  
Microwave Irradiation ◽  
Synthesis And Characterization
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