Papers by Keyword: Antibacterial Properties

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Authors: Hong Xia Zhang, Yan Lu, Cheng Yan Zhu, Wei Tian, Yan Qing Li
Abstract: To study the relationship between the content of silver-plated fibers in fabrics and the antibacterial performance of fabrics, five sets of samples with common polyester yarns and silver-plated polyamide yarns were manufactured for the experiment; a qualitative antibacterial test with flask-shaking method was performed and compared for fabrics with different content of silver-plated fibers. The results show that the fabrics with silver-plated fibers have good antibacterial effect, and the bacterial inhibition rate will be improved as the content of silver-plated fibers increasing. When the content of silver-plated fibers is 3.6%, the bacterial inhibition rate for coli form will reach to 76.92%, when the content of silver-plated fibers is higher than 11.99%, the fabrics have better antibacterial property for coli form and the bacterial inhibition rate is higher than 99%.
Authors: Zheng Li, Zhen Feng Dong, Jian Fei Zhang, Ji Xian Gong, Fan Jie Meng
Abstract: In order to determined the antibacterial property of Apocynum venetum. Three kinds of extractants (distilled water, 75% ethanol and absolute ethanol) were used to extract the leaf, stick and skin of Apocynum venetum, respectively. Flask and plate methods were used to evaluate the antibacterial property of these extracts on four kinds of classical microbiologies, Escherichia coli, Staphylococcus aureus, Saccharomyces cerevisiae and Aspergillus niger, respectively. The results showed that the antibacterial rate of extract by 75 % ethanol was better than extracts by water or absolute ethanol on Escherichia coli and skin contained more antibacterial substance (on Escherichia coli) than others. The antibacterial rate of extract by distill water was better than extracts by 75 % ethanol or absolute ethanol on Staphylococcus aureus and stick contained more antibacterial substance (on Staphylococcus aureus) than others. Some of extracts had very weak antibacterial rate on Saccharomyces cerevisiae and all extracts had not antibacterial effect on Aspergillus niger.
Authors: Tao Chen, Hai Di Zang, De Liang Zhang, Yan Bai
Abstract: Substances extracted from the scutellaria based on the boiled were introduced to make the cotton fabrics achieve a good antibacterial properties. Specifically, the orthogonal experiment was designed based on four factors such as the concentration of extraction (compared with the original extraction), temperature, pH and mordant dyeing methods. It is proved that the cotton fabrics in such conditions, for instance, the scutellaria concentration of extraction of 80%, pH value of 9, at 80°C and the media reprocessing, can acquire a good antibacterial properties, and the bacillus subtilis antibacterial rate can reach 86.69%. Simultaneously, the rate of antibacterial against escherichia coli can reach 74.77%. It can still keep a good antibacterial properties after three times washing and ten times washing, and the bacillus subtilis inhibition rate is approximately 84.73% and 72.37% respectively, and the E. coli antibacterial rate is approximately 70.78% and 64.27% respectively.
Authors: Jian Wang, Ming Hui Zhao, Yu Bao Li, Yi Zuo, Bin Sun, Jia Xing Jiang, Qin Zou, Ji Dong Li
Abstract: Elimination of microorganisms from the root canal system and the prevention of subsequent reinfection are of importance for long-term endodontic treatment. The application of a sealer with antibacterial properties may reduce the reinfection and improve the success rate of the root filling treatment. The aim of this paper is to evaluate the antibacterial properties of a novel root canal sealer based on injectable self-curing polyurethane with silver phosphate (PU/Ag3PO4). The antibacterial abilities were assessed by direct contact test, anti-bacterial adhesion assay and bacteriostatic rate test. The results show that the fabricated PU/Ag3PO4 sealer can completely inhibit the bacterial growth and prevent bacterial adhension effectively. The bacteriostatic rate is 93.6% and 98.1% when the bacteria incubated with PU/Ag3PO4 sealer for 7 and 24h respectively. The strong antibacterial abilities suggest that PU/Ag3PO4 sealer has great application potential in the field of root canal filling.Key words: Root canal sealer, polyurethane, silver phosphate, antibacterial properties, direct contact test
Authors: Mehrdad Rashidzadeh
Abstract: High purity Cadmium (Cd) metal was used as raw material and placed in a microwave susceptor. an evaporation/oxidation process occurs under exposure to microwave in less than 2 minutes. Then, Evaporated cadmium reacted with oxygen and cadmium oxide was collected on the inner surface of a glassy container that was placed a few centimeters above the susceptor. Morphological and structural information of As-synthesized CdO nanopowder, were investigated via SEM and X-ray diffraction (XRD) spectroscopy. The antibacterial activities of different concentration of the CdO nanoparticles were tested by treating Escherichia coli (Gram negative) cultures with CdO nanoparticles. The Study indicates that cadmium oxide nanoparticles show effective antibacterial activity toward the gram-negative bacterium E. coli. Electrochemical properties of as-synthesized powder were investigated via linear and two vertex cyclic voltammetery in the presence of ethanol, a pair of Oxidation/reduction peaks were achieved.
Authors: Ya Ge Xing, Qing Lian Xu, Ya Jun Sun, Xi Hong Li, Wei Li Li
Abstract: In this investigation, antibacterial property of active packaging of microencapsulated cinnamon oil combined with ZnO-coated PVC film was investigated. Microencapsulated cinnamon oil was prepared by simple coacervation and the morphology of microencapsulation was also analyzed by SEM. Result also showed that microencapsulated cinnamon oil and ZnO-coated PVC film exhibited good antibacterial activities against E. coli and S. aureus. In vivo fruit test, the active packaging of microencapsulated cinnamon oil combined with ZnO-coated PVC film showed good inhibition property the growth of bacteria on the surface of fresh-cut apple slices.
Authors: Su Yong Huang, Kai Fu Li
Abstract: Small samples of Chinese fir/TiO2 Composite were prepared using sol-gel method and microwave assisted liquid phase deposition (MWLPD) method for the first time. Results of antibacterial test show that during a one year test the samples exhibited prominent, broad-spectrum and long-lasting antibacterial performance, but were also influenced by light exposure and temperature.
Authors: Ju Wei Wang
Abstract: In recent years, with the requirements of environmental protection of packaging materials improve, biodegradable antibacterial materials more and more attention to. This paper to can hair sex polystyrene as main raw materials, and by the synthesis of biodegradable bacteriostasis of study on the properties of packaging materials. The results shows that can hair sex polystyrene as the main raw material made by injection molding process thickness of 0.25 mm plate, and influence factors of sheet material performance, get the film material performance is the ideal process parameters. According to People's Republic of China national standard GB/T1040-92"plastic tensile properties test method" and GB/T20197-2006"degradable plastics the definition, classification, signs and degrade the performance requirements," as determined by the experimental method for testing. The orthogonal experiment results show that can hair sex polystyrene usage: 6 g; Microcrystalline cellulose usage: 0.2g; The antibacterial agent type: silver nanotio2 in the system performance and degrade the performance of the material mechanics and antibacterial good performance.
Authors: Ying Ya Yang, Dan Yu, Wei Wang
Abstract: Antibacterial polyester (PET) fibers with high electric conductivity were introduced by pretreatment-free electro-less silver plating in this study. The PET fibers were modified with the amide-siloxane film before silver coating, which was proved by the ATR-FTIR spectra, energy dispersive X-Ray (EDX) analysis and thermo-gravimetric (TG) analysis, respectively. Uniform and compact silver-coated film was found on the surface of PET fibers, evidenced by scanning electron microscopy (SEM). With 16% silver loading, the results indicted that silver-coated fibers have high electric conductivity (2.66Ω/cm) and exhibit strong antimicrobial activity against Escherichia coli (with 6.5 mm inhibition ring).
Authors: Yun Hui Xu, Sa Yin Lv, Yong Jin Deng
Abstract: The bamboo pulp fiber fabric was treated by chitosan with low molecular weight in aqueous citric acid. The effect of citric acid concentration, chitosan concentration, treatment time and reaction temperature on anti-creasing and mechanical properties of the fabric were studied, respectively. Meanwhile, the optimal finishing condition was obtained. The anti-wrinkle and hygroscopic properties of all processed fabrics improved markedly at the optimal technology. However, the breaking strength of the fabric decreased slightly after the optimal treatment. FT-IR characterization of the treated fabric showed that the chitosan was crosslinked on the bamboo pulp fiber fabric and the ester linkage was formed between the citric acid and bamboo pulp cellulose. The antibacterial property of the chitosan treated fabric increased dramatically. The resulting bamboo pulp fiber fabric treated by chitosan is a natural ecological textile product, having the various application and more potential chemical modification.
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