Comparing the toxicity of differently sized amino-modified polystyrene nanoparticles, where either the mass, surface area or the number of particles were the same, revealed that size was the only important factor for toxicity.
Nanoporous Au in two distinctly different surface states, namely, positively charged as-dealloyed and reduced clean metallic were investigated for temperature dependent properties like specific capacitance Cs and specific mass surface area αm.
The density of the sample based on the current BET result is calculated to be 2.16 g cm-3 (Assuming that each Fe3O4 NPs is an ellipsoid, thus ρ = M V, and M = A s · S, where ρ is the density of the sample; M, S and V are the mass, surface area and volume of one Fe3O4 particle, respectively; A s is the BET surface area of the sample.
Correctly solving this exam question requires students to couple their understanding of the scaling law that controls the relationship between an object's mass, surface area, and the cross-sectional area of its limbs.
It is of utmost importance to characterize human exposures in terms of the physicochemical nature, the aggregation state, and concentration (number, mass, surface area) of engineered nanomaterials and perform animal and in vitro studies accordingly.
In contrast to the present results, Stoehr et al. [ 27] showed that silver wires (length: 1.5 25 μm; diameter 100 160 nm) had a strong effect on A549 human lung epithelial cells, whereas PVP-coated spherical silver nanoparticles (30 nm) had no effect with a similar particle mass, surface area, and number concentration.
We compare the specific-mass surface area αm of nanoporous Au values with the geometrical surface area αg, obtained by using the "ball-stick geometrical model" coupled with scanning electron microscopy images.
The validation of the specific-mass surface area obtained from the capacitance ratio method was confirmed by Brunauer-Emmett-Teller analysis and the process of adsorption/desorption of OH adsorbed species on pore surfaces in reduced clean metallic np-Au.
22 Nevertheless, RMR does not only depend on muscle mass and may be influenced by several factors, including fat-free mass, body surface area, fat mass, age, and sex.
Increase in pulsation intensity increases the energy supply to the column and, therefore, decreases the diameter of the dispersed phase drops which in effect increases the mass transfer surface area and, therefore, mass transfer efficiency [37, 38].
Means and standard deviations were calculated for subject characteristics (age, height, mass, body surface area, surface area-to-mass ratio, body fat percentages, and VO2).
