Microstructure and antibacterial performance of functionalized polyurethane based on polysiloxane tethered cationic biocides

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 77508-77517 ◽  
Author(s):  
Qinghua Zhang ◽  
Hailong Liu ◽  
Xiaoli Zhan ◽  
Fengqiu Chen ◽  
Jie Yan ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Free Energy ◽  
Antibacterial Activity ◽  
Surface Free Energy ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Antibacterial Performance ◽  
Special Surface

The designed polyurethane containing polysiloxanes tethered quaternary ammonium salt groups exhibited special surface migrations, low surface free energy and excellent antibacterial activity towardsEscherichia coli.

scholarly journals Preparation of Cross-linked Chitosan Quaternary Ammonium Salt Hydrogel Films Loading Drug of Gentamicin Sulfate for Antibacterial Wound Dressing

Marine Drugs ◽  
2021 ◽  
Vol 19 (9) ◽  
pp. 479
Author(s):  
Jingjing Zhang ◽  
Wenqiang Tan ◽  
Qing Li ◽  
Xiaorui Liu ◽  
Zhanyong Guo
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Wound Dressing ◽  
Cross Linking ◽  
And Staphylococcus Aureus ◽  
Hydrogel Films

Hydrogels, possessing high biocompatibility and adaptability to biological tissue, show great usability in medical applications. In this research, a series of novel cross-linked chitosan quaternary ammonium salt loading with gentamicin sulfate (CTMCSG) hydrogel films with different cross-linking degrees were successfully obtained by the reaction of chitosan quaternary ammonium salt (TMCS) and epichlorohydrin. Fourier transform infrared spectroscopy (FTIR), thermal analysis, and scanning electron microscope (SEM) were used to characterize the chemical structure and surface morphology of CTMCSG hydrogel films. The physicochemical property, gentamicin sulphate release behavior, cytotoxicity, and antibacterial activity of the CTMCSG against Escherichia coli and Staphylococcus aureus were determined. Experimental results demonstrated that CTMCSG hydrogel films exhibited good water stability, thermal stability, drug release capacity, as well as antibacterial property. The inhibition zone of CTMCSG hydrogel films against Escherichia coli and Staphylococcus aureus could be up to about 30 mm. Specifically, the increases in maximum decomposition temperature, mechanical property, water content, swelling degree, and a reduction in water vapor permeability of the hydrogel films were observed as the amount of the cross-linking agent increased. The results indicated that the CTMCSG-4 hydrogel film with an interesting physicochemical property, admirable antibacterial activity, and slight cytotoxicity showed the potential value as excellent antibacterial wound dressing.

scholarly journals Antibacterial performance of polymer quaternary ammonium salt–capped silver nanoparticles on Bacillus subtilis in water

RSC Advances ◽  
2019 ◽  
Vol 9 (44) ◽  
pp. 25667-25676 ◽  
Author(s):  
Jingyu Wang ◽  
Minghao Sui ◽  
Zhanfang Ma ◽  
Hongwei Li ◽  
Bojie Yuan
Keyword(s):  
Silver Nanoparticles ◽  
Bacillus Subtilis ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Antibacterial Performance ◽  
Antibacterial Capacity

Polymer quaternary ammonium salt–capped silver nanoparticles (PQAS–AgNPs) were synthesized, and they exhibited significant antibacterial capacity against Bacillus subtilis.

Antibacterial activity of quaternary ammonium salt grafted cotton

2007 ◽  
Vol 98 (3) ◽  
pp. 209-218 ◽  
Author(s):  
N. Ladhari ◽  
M. H. V. Baouab ◽  
Abdelbasset Ben Dekhil ◽  
Amina Bakhrouf ◽  
P. Niquette
Keyword(s):  
Antibacterial Activity ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt

Attachment Strength to Pork Skin and Resistance to Quaternary Ammonium Salt and Heat of Escherichia coli Isolates Recovered from a Pork Slaughter Line

2005 ◽  
Vol 68 (11) ◽  
pp. 2447-2450 ◽  
Author(s):  
AZADEH NAMVAR ◽  
KEITH WARRINER
Keyword(s):  
Escherichia Coli ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Enteric Bacteria ◽  
Salt Resistance ◽  
Inactivation Kinetics ◽  
Genetic Lineage ◽  
E Coli ◽  
Attachment Strength

The aim of this study was to determine whether the attachment strength to pork skin, quaternary ammonium salt resistance, and thermal inactivation kinetics (at 65°C) of a range of Escherichia coli isolates could be correlated with their temporal stability (persistence) within a pork slaughter line. The genetic lineage of the E. coli isolates was determined using entero-bacterial repetitive intergenic consensus–PCR. The genotypes were divided into transient and endemic populations based on the number of times they were recovered within and across sampling visits made to a pork slaughterhouse. No significant variation in the D-value at 65°C (0.27 to 0.51 min) was observed among the genotypes tested. However, differences in D-values were found for 100 ppm quaternary ammonium salt (3.0 to 6.0 min). All of the E. coli genotypes attached strongly to pork skin, and a high proportion of cells were irreversibly bound (39 to 42% of the initial inoculum). However, variation among genotypes was found with respect to loose attachment (21 to 33% of inoculated cells). No correlation between persistence of E. coli genotypes within the slaughter line and attachment strength or quaternary ammonium salt resistance was found. Variation in either physiological attribute could not be predicted based on genetic lineage. Additional or alternative factors may contribute to the ability of E. coli populations to become endemic within pork processing facilities. More studies should be conducted to elucidate the underlying factors that promote the formation of endemic populations of E. coli and other enteric bacteria (e.g., Salmonella) within slaughter lines.

scholarly journals Antibacterial Activity of Quaternary Ammonium Salt from Diethylaminoethyl Methacrylate

2010 ◽  
Vol 7 (s1) ◽  
pp. S61-S66 ◽  
Author(s):  
Makhloufia Mohammed ◽  
BenaÏssa Tahar ◽  
Derdour AÏcha ◽  
Henni Djamel Eddine
Keyword(s):  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Inhibitory Concentration ◽  
Gram Negative Bacteria ◽  
Inhibitory Zone ◽  
Gram Negative ◽  
Gram Positive Bacteria

A quaternary ammonium salt was synthesized from diethylaminoethyl methacrylate (DEAEMA) by quaternization with hexadecyl bromide. The resultant compound (Am-h) was characterized by FTIR and NMR spectroscopy. Its bactericidal activity was evaluated by determining minimum inhibitory concentration (MIC) values and inhibitory zone diameter against gram positive bacteria (Streptococcus sp.) and gram negative bacteria such asAcenito baumannii, Klebsiella pneumoniaeandProteus sp. respectively. The results showed that the MIC values of the synthesised compound (Am-h) were 2 μg/mL againstAcenito baumannii, Klebsiella pneumoniae, Proteus sp. and Streptococcus sp.

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