Search results
Search for "antioxidant" in Full Text gives 83 result(s) in Beilstein Journal of Nanotechnology.
Release behaviour and toxicity evaluation of levodopa from carboxylated single-walled carbon nanotubes
Beilstein J. Nanotechnol. 2015, 6, 243–253, doi:10.3762/bjnano.6.23
- Mytilineou et al. [30], where the LD exposed to mesencephalic cultures at 72 h of treatment was associated with a dose-dependent reduction in cell survival. The authors attributed the potential toxicity of LD to the decreased antioxidant capacity in the limited environment of the cell culture that makes the
Interaction of dermatologically relevant nanoparticles with skin cells and skin
Beilstein J. Nanotechnol. 2014, 5, 2363–2373, doi:10.3762/bjnano.5.245
- antioxidant levels as indicators of oxidative stress [16], it is now increasingly being used to study particle–skin interactions [17][18]. Yet, not all particle types are equally suited for such investigations. In the following, we report our results on confocal Raman microscopy for analyzing the skin
Liquid-phase exfoliated graphene: functionalization, characterization, and applications
Beilstein J. Nanotechnol. 2014, 5, 2328–2338, doi:10.3762/bjnano.5.242
- graphene close to the defects and at the edges. Under prolonged periods of ultrasonication, the oxidation can cut graphene sheets into small pieces. A well-known strategy to mitigate the damage induced by radicals in different biological processes is through the addition of antioxidant. Following this
- approach, the ultrasonication of graphite upon addition of N-(2-mercaptopropionyl)glycine (tiopronin) was reported [9]. Tiopronin is an antioxidant molecule that traps electrons, radicals and peroxides. The ultrasonication of graphite in the presence of tiopronin produced larger graphene layers as compared
- produces dispersions of larger graphene sheets of higher concentration than common ultrasonication in DMF. With this, it was demonstrated that the use of antioxidant molecules during ultrasonication treatments reduces the damage caused by radicals and other oxidizing chemical species, attacking mainly the
Nanobioarchitectures based on chlorophyll photopigment, artificial lipid bilayers and carbon nanotubes
Beilstein J. Nanotechnol. 2014, 5, 2316–2325, doi:10.3762/bjnano.5.240
- stability, good antioxidant and antimicrobial properties, and could be used as biocoating materials. As compared to the cholesterol-free samples, the cholesterol-containing hybrid structures demonstrated better stability (i.e., their zeta potential reached the value of −36.4 mV), more pronounced oxygen
- radical scavenging ability (affording an antioxidant activity of 73.25%) and enhanced biocidal ability, offering inhibition zones of 12.4, 11.3 and 10.2 mm in diameter, against Escherichia coli, Staphylococcus aureus and Enterococcus faecalis, respectively. Keywords: antibacterial activity; antioxidant
- largely used as drug delivery vehicles, showing potential in targeting specific cancer cells [18] with a necessary dosage lower than conventional drugs, without harming healthy cells and significantly reduced side effects. Another interesting property of carbon nanotubes is their antioxidant activity
PVP-coated, negatively charged silver nanoparticles: A multi-center study of their physicochemical characteristics, cell culture and in vivo experiments
Beilstein J. Nanotechnol. 2014, 5, 1944–1965, doi:10.3762/bjnano.5.205
- nanoparticles neither caused toxicity nor oxidative stress, while an incubation for 4 h with 100 µM (10.8 µg mL−1) silver in the form of silver nitrate strongly damaged cultured astrocytes and deprived these cells almost completely of the important antioxidant glutathione [108]. The high resistance of cultured
Precise quantification of silica and ceria nanoparticle uptake revealed by 3D fluorescence microscopy
Beilstein J. Nanotechnol. 2014, 5, 1616–1624, doi:10.3762/bjnano.5.173
- , several investigations showed that the toxicity increases with decreasing particle sizes, increasing doses and longer exposure times [14][15][16]. In the case of ceria nanoparticles, very contradictory findings have been reported. On the one hand, the anti-inflammatory, antioxidant and radio-protective
Mimicking exposures to acute and lifetime concentrations of inhaled silver nanoparticles by two different in vitro approaches
Beilstein J. Nanotechnol. 2014, 5, 1357–1370, doi:10.3762/bjnano.5.149
- , increased levels of oxidative stress and reactive oxygen species (ROS) were detected over a time period of 48 h [22][25][26]. Environmental stressors trigger the production of intracellular ROS, which can overwhelm the cellular antioxidant defence system. ROS can cause DNA damage, which results in the
Glassy carbon electrodes modified with multiwalled carbon nanotubes for the determination of ascorbic acid by square-wave voltammetry
Beilstein J. Nanotechnol. 2012, 3, 388–396, doi:10.3762/bjnano.3.45
- no significant difference (P = 0.05). Keywords: ascorbic acid; carbon nanotubes; glassy carbon electrode; square-wave voltammetry; Introduction L-ascorbic acid (AA), also known as vitamin C, is a well-known antioxidant, which helps the human body to reduce oxidative damage and protects food quality
- -wave voltammetry (SWV), have been employed as alternative tools for the evaluation of antioxidant activity [8]. These methods are attractive because of the speed of analysis, simplicity and low cost of the instrumental requirements. Ascorbic acid oxidation at a bare glassy carbon electrode (GCE
Other Beilstein-Institut Open Science Activities
