Synthesis, characterization and comparison of antimicrobial activity of PEG/TritonX-100 capped silver nanoparticles on collagen scaffold

Mandal, Abhijit; Meda, Venkatesh; Zhang, W.J.; Farhan, K.M.; Gnanamani, A.

doi:10.1016/j.colsurfb.2011.10.021

Cited by 79 publications

(46 citation statements)

References 42 publications

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“…Minimum E 0 of 813 and 765 MPa occurred at 40 and 85°C, respectively. During the tanning, pre-tanning processes and exposure to the atmosphere, collagen matrix absorbs water [20]. Increase in temperature dehydrates the collagen, making the fibrils and bundles to come together and the structure to be more compact and stiff, hence increasing E 0 [21,22].…”

Section: Resultsmentioning

confidence: 99%

Influence of UV radiation on the viscoelastic properties and dynamic viscosity of bovine hide using dynamic mechanical analysis

Nalyanya

Migunde

Ngumbu

et al. 2015

J Therm Anal Calorim

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The wide range of applications of collagenbased materials has triggered research interest especially on the effect of environmental factors in that these materials are exposed to during processing and application. As the applications of these collagenous materials continue to increase such as in the field of medicine, more studies are required to gain more insight into their properties. Collagen is a natural biopolymer whose structure is sensitive to ultraviolet (UV) radiations, which alters its mechanical properties. In this study, the influence of artificial UV irradiations, wavelength 254 nm, on the viscoelastic properties and dynamic viscosity of both pickled and tanned hide was investigated by dynamic mechanical analysis. The influence of tanning on the viscoelastic properties and dynamic viscosity was also investigated. Freshly flayed bovine hide was conventionally prepared to pickling stage and split into two identical halves along the backline. One half was tanned using chromium sulfate, while the other half was left at the pickled stage. Samples of appropriate dimensions from both the pickled and tanned hides were cut and irradiated with artificial UV light for different time duration of 6-30 h. The irradiated samples were then analyzed using the DMA in the multi-frequency mode. It was found that irradiation caused an increase in the storage modulus (E 0 ) of pickled hide over the entire irradiation of 6 h followed by consistent decrease up to a duration of 30 h. Tanning caused an increase in tand that consistently decreased with the increase in the duration of irradiation. In addition, UV irradiation caused an increase in dynamic viscosity of pickled hide, but a decrease in tanned hide. The results show the predominant elastic nature of bovine hides as indicated by tand magnitudes less than a unit.

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Section: Resultsmentioning

confidence: 99%

Influence of UV radiation on the viscoelastic properties and dynamic viscosity of bovine hide using dynamic mechanical analysis

Nalyanya

Migunde

Ngumbu

et al. 2015

J Therm Anal Calorim

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“…[14] In particular, silver nanoparticles are used in diagnostic biomedical optical imaging [15] and antimicrobial/antibacterial activity. [16,17] Oxidation of silver nanoparticle is thermodynamically unfavorable, due to the large positive reduction potential of silver, and thus resulting in quite stable condition in aqueous and alcoholic suspensions without the aid of capping agents. Chemical reduction methods are commonly used to synthesize the silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Rapid Facile Synthesis, Characterization, and Their Antibacterial Activity of PVP Capped Silver Nanospheres

Jayaprakash¹,

Vijaya²,

Kennedy

2015

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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A simple one-step rapid green microwave irradiation method is described for the synthesis of silver nanospheres (Ag NS) using threonine as a reducing and polyvinyl-pyrrolidone as a capping agent. UV-Visible spectrum and photoluminescence spectrum confirmed the formation of Ag NS. High-resolution transmission electron microscopy and high-resolution scanning electron microscopy was used to find the morphology of the synthesized sample, which has sphere-like morphology. The elemental composition of the Ag NS was determined by energy dispersive X-ray analysis. Antibacterial experiments showed that the prepared Ag NS had better antibacterial activities than silver nitrate in the same concentration.

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“…Surfactants are compounds known for their ability to inhibit the growth of bacteria and fungi [24][25][26][27][28] as well as increase the efficacy of some antimicrobial agents [29,30]. Generally, ionic surfactants present higher toxicity than nonionic.…”

Section: Discussionmentioning

confidence: 99%

Surface and Antimicrobial Activity of Sulfobetaines

Wieczorek

Gwiazdowska

Staszak

et al. 2016

J Surfact & Detergents

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Sulfobetaines belong to the group of zwitterionic surfactants. They are electroneutral salts, which have in the same molecule, two ionic centers with different charge. Due to the specific structure they exhibit excellent properties such as good solubility in water and detergency. In this paper we present surface properties and adsorption parameters of sulfobetaines in water/air systems. From the adsorption isotherms the CMC value, the surface tension and surface pressure at the CMC as well as the efficiency of adsorption were determined. Physicochemical analyses of the data allowed for the further description of adsorption process. Results showed that sulfobetaines exhibit good surface properties especially low CMC and p20 values. Additionally the antimicrobial activity of sulfobetaines solutions against gram‐positive and gram‐negative bacteria were tested by the well‐diffusion method. MIC values and growth kinetics were determined by microdilution method. Antimicrobial assays demonstrated that sulfobetaines can be good antibacterial agents, but the activity of surfactants strongly depends on alkyl chain length.

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Synthesis, characterization and comparison of antimicrobial activity of PEG/TritonX-100 capped silver nanoparticles on collagen scaffold

Cited by 79 publications

References 42 publications

Influence of UV radiation on the viscoelastic properties and dynamic viscosity of bovine hide using dynamic mechanical analysis

Influence of UV radiation on the viscoelastic properties and dynamic viscosity of bovine hide using dynamic mechanical analysis

Microwave-Assisted Rapid Facile Synthesis, Characterization, and Their Antibacterial Activity of PVP Capped Silver Nanospheres

Surface and Antimicrobial Activity of Sulfobetaines

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