Synthesis and characterization of ultrafiltration membranes by phase inversion and by uropathogenic Escherichia coli retention performance

2019 ◽  
Vol 163 ◽  
pp. 109-117
Author(s):  
Ibtissem Ounifi ◽  
Neila Saidi ◽  
Malak Kahloula ◽  
Kathleen Sullivan Sealey ◽  
Amor Hafiane ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Phase Inversion ◽  
Uropathogenic Escherichia Coli ◽  
Synthesis And Characterization ◽  
Retention Performance ◽  
Ultrafiltration Membranes

Synthesis and characterization of fluorescent perylene bisimide-containing glycopolymers for Escherichia coli conjugation and cell imaging

Polymer ◽  
2011 ◽  
Vol 52 (25) ◽  
pp. 5764-5771 ◽  
Author(s):  
Li Qun Xu ◽  
Chao Huang ◽  
Rong Wang ◽  
Koon-Gee Neoh ◽  
En-Tang Kang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Cell Imaging ◽  
Synthesis And Characterization ◽  
Perylene Bisimide

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.

Synthesis and Characterization of Surface-Active Ionic Liquids Used in the Disruption of Escherichia Coli Cells

ChemPhysChem ◽  
2019 ◽  
Vol 20 (5) ◽  
pp. 727-735 ◽  
Author(s):  
Tânia E. Sintra ◽  
Miguel Vilas ◽  
Margarida Martins ◽  
Sónia P. M. Ventura ◽  
Ana I. M. C. Lobo Ferreira ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Ionic Liquids ◽  
Synthesis And Characterization ◽  
Escherichia Coli Cells ◽  
Surface Active

scholarly journals Characterization of auto-agglutinating and non-typeable uropathogenic Escherichia coli strains

2019 ◽  
Vol 13 (06) ◽  
pp. 465-472
Author(s):  
Ulises Hernández-Chiñas ◽  
Alejandro Pérez-Ramos ◽  
Laura Belmont-Monroy ◽  
María E Chávez-Berrocal ◽  
Edgar González-Villalobos ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Virulence Genes ◽  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Uropathogenic Escherichia Coli ◽  
E Coli ◽  
Resistant Strains ◽  
Tract Infections ◽  
Disk Method

Introduction: Uropathogenic Escherichia coli (UPEC) are the main etiological agent of urinary tract infections (UTIs). Association between different serotypes and UTIs is known, however, some strains are incapable to be serotyped. The aim of this work was to study bthe phenotypical and genotypical characteristics of 113 non-typeable (NT) and auto-agglutinating (AA) E. coli strains, isolated from UTIs in children and adults. Methodology: The 113 UPEC strains were analyzed by PCR assays using specific primers to determine their serogroups, fimH, papC, iutA, sat, hlyCA and cnf1, virulence associated genes, and chuA, yjaA and TSPE4.C2 for phylogroup determination. Additionally, the diffusion disk method was performed to evaluate the antimicrobial resistance to 18 antimicrobial agents. Results: Using the PCR assay, 63% (71) of the strains were genotyped showing O25 and O75 as the most common serogroups. The virulence genes fimH (86%) and iutA (74%) were the most prevalent, in relation to the phylogroups the commensal (A and B1) and virulent (B2 and D) showed similar frequencies (P > 0.05). The antimicrobial susceptibility test showed a high percentage (73%) of multidrug-resistant strains. Conclusions: The genotyping allowed identifying the serogroup in many of the strains that could not be typed by traditional serology. The strains carried virulence genes and were multidrug-resistant in both, commensal and virulent phylogroups. Our findings revealed that, in addition to the classical UPEC serogroups, there are pathogenic serogroups not reported yet.

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