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Synthesis, Characterization and Biological Evaluation of Triclosan Grafted onto Cellulosic Fibers
Khaldi Zineb,Nzambe Ta Keki Jean Kerim,Besse Claire,Ouk Tan-Sothéa,Hadj-Bouazza Amel,Zerrouki Rachida 한국섬유공학회 2018 Fibers and polymers Vol.19 No.9
With the increased risk of disease transmissions and cross-infection caused by microorganisms, the control of microbial infections becomes a very important issue in modern societies. Moreover, with the emergence of antibio-resistant bacterial strains, it is necessary to control the bacterial growth. One of ways to limit the bacterial proliferation is to develop antimicrobial surfaces. The present work describes the synthesis process of a direct linking of propargyled Triclosan to a modified Kraft Pulp. Propargylated Triclosan, and azidated Kraft Pulp were linked in the presence of Cu(I) catalyst, a type of Huisgen’s 1,3-dipolar azide-alkyne cycloaddition reaction, leading to the formation of Triclosan linked to kraft Pulp fibers. The modified Kraft Pulp fibers are characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). This novel material has been investigated for its antibacterial properties against Escherichia coli, Staphylococcus aureus, Bacillus cereus and Pseudomonas aeruginosa. The developed material showed an important antibacterial activity. Although Triclosan is covalently grafted onto Kraft Pulp, its antibacterial properties are maintained.
Plant diversity in different bioclimatic zones in Tunisia
You, H.,Jin, H.,Khaldi, A.,Kwak, M.,Lee, T.,Khaine, I.,Jang, J.,Lee, H.,Kim, I.,Ahn, T.,Song, J.,Song, Y.,Khorchani, A.,Stiti, B.,Woo, S. Korean Biodiversity Information Facility 2016 Journal of Asia-Pacific biodiversity(Online) Vol.9 No.1
The Republic of Tunisia, located in northern Africa, faces various environmental challenges caused by anthropogenic practices such as overgrazing, deforestation, and desertification. The conversion of natural ecosystems is the major cause of plant biodiversity loss. Tunisia can be divided into three main climatic zones as follows: a northern Mediterranean climate zone, a central steppe climate zone, and a southern desert climate zone. Because of this great environmental diversity, there are distinctive vegetation and various genetic resources in Tunisia. This research was conducted to investigate plant biodiversity within the various bioclimatic zones and to characterize useful plant resources in Tunisia. We investigated native, medicinal and aromatic, desert, and soil erosion control plant species.