Novel ZnO:Ag nanocomposites induce significant oxidative stress in human fibroblast malignant melanoma (Ht144) cells

• Syeda Arooj,
• Samina Nazir,
• Akhtar Nadhman,
• Nafees Ahmad,
• Bakhtiar Muhammad,
• Ishaq Ahmad,
• Kehkashan Mazhar and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2015, 6, 570–582, doi:10.3762/bjnano.6.59

• with 3% Ag content (size: 12 nm) were toxic to different bacterial strains. Talari et al. [34] reported that increase in Ag content in the ZnO:Ag nanocomposites improved the antimicrobial activity of these particles. The addition of Ag content in ZnO NPs causes a positional shift in XRD pattern

Nanobioarchitectures based on chlorophyll photopigment, artificial lipid bilayers and carbon nanotubes

• Marcela Elisabeta Barbinta-Patrascu,
• Stefan Marian Iordache,
• Ana Maria Iordache,
• Nicoleta Badea and
• Camelia Ungureanu

Beilstein J. Nanotechnol. 2014, 5, 2316–2325, doi:10.3762/bjnano.5.240

• Sigma-Aldrich (Germany). The antimicrobial activity was tested against human pathogenic bacteria such as Staphylococcus aureus ATTC 25923, Escherichia coli ATCC 8738, and Enterococcus faecalis ATCC 29212. The bacterial strains were grown in Luria Bertani Agar (LBA) plates at 37 °C with the following

• ). Antimicrobial activity of samples The antimicrobial investigations were performed on Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus, Enterococcus faecalis) bacteria. Phosphate buffer solution (pH 7.4) was the negative control for all the samples. The liposomes alone (samples V1 and V2

Antimicrobial nanospheres thin coatings prepared by advanced pulsed laser technique

• Alina Maria Holban,
• Valentina Grumezescu,
• Alexandru Mihai Grumezescu,
• Bogdan Ştefan Vasile,
• Roxana Truşcă,
• Rodica Cristescu,
• Gabriel Socol and
• Florin Iordache

Beilstein J. Nanotechnol. 2014, 5, 872–880, doi:10.3762/bjnano.5.99

• biocompatibility with human cells, the newly synthesized nano-active thin coating exhibited a great antimicrobial activity. The surface inhibited both S. aureus and P. aeruginosa attachment and also the formation of non-specific biofilms. MAPLE deposited thin films interfere with biofilm formation both in the

Photocatalytic antibacterial performance of TiO₂ and Ag-doped TiO₂ against S. aureus. P. aeruginosa and E. coli

• Kiran Gupta,
• R. P. Singh,
• Ashutosh Pandey and
• Anjana Pandey

Beilstein J. Nanotechnol. 2013, 4, 345–351, doi:10.3762/bjnano.4.40

• and transfer behaviour of the photoexcited electron–hole pairs in the semiconductors was recorded by photoluminescence. The antimicrobial activity of TiO2 and Ag-doped TiO2 nanoparticles (3% and 7%) was investigated against both gram positive (Staphylococcus aureus) and gram negative (Pseudomonas

• zero viability at 40 mg/30 mL culture in the case of P. aeruginosa only. Keywords: Ag-doped TiO2; antimicrobial activity; sol–gel; Introduction The photocatalytic agent TiO2, known for its chemical stability and optical competency, has been used extensively for killing different groups of

• blocking of respiration and cell death of the bacteria [10]. Another remarkable mechanism of the antimicrobial activity of Ag nanoparticles is related to the formation of free radicals and consequent free-radical-induced oxidative damage of the cell membranes of bacteria [11][12]. But the same result was

Electrospinning preparation and electrical and biological properties of ferrocene/poly(vinylpyrrolidone) composite nanofibers

• Ji-Hong Chai and
• Qing-Sheng Wu

Beilstein J. Nanotechnol. 2013, 4, 189–197, doi:10.3762/bjnano.4.19

• PVP nanofibers. X-ray diffraction (XRD) results showed that the crystalline structure of Fc in the fibers was amorphous after the electrospinning process. A biological evaluation of the antimicrobial activity of Fc/PVP nanofibers was carried out by using Gram-negative Escherichia coli (E. coli) as

• agent. In the case of Fc/PVP nanofibers, water-soluble polymer PVP, as a carrier, not only provides good dispersion for Fc, but also can release Fc quickly upon encountering a small amount of water. The antimicrobial activity of composite Fc/PVP nanofibers is explored in this article. Common E.coli was

• counter electrode, and a saturated calomel electrode (SCE) as the reference electrode. Antimicrobial activity testing of Fc/PVP nanofibers The sample containing 45 wt % Fc was tested for antibacterial activity against the Gram-negative E. coli. Samples were prepared in the form of discs with a diameter of

Paper modified with ZnO nanorods – antimicrobial studies

• Mayuree Jaisai,
• Sunandan Baruah and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2012, 3, 684–691, doi:10.3762/bjnano.3.78

• measure of zones of inhibition (edge of the square inhibition zone in centimeters) around the paper squares of side 1.5 cm for different samples with ZnO nanorods. The antimicrobial activity in the dark is due to the slow release of Zn2+ ions arising from partial dissolution of ZnO in the moist

• environment leading to the rupture of the bacterial cell wall [23]. S. aureus, being a Gram-positive bacterium, has a thicker cell wall [24], and consequently its immobilization by using the ZnO-coated antimicrobial paper is comparatively lower than that of E. coli. The highest antimicrobial activity was

• batches, as described in [21]. The samples were dried in a laminar air flow for 10 min prior to conducting antimicrobial tests. The antimicrobial activity was observed considering the zone of inhibition (absence of viable microbial cells) around the paper samples. For the zone-of-inhibition test, 100 µL