aza heterocyclic compounds are major interest for organic chemists because of their mainly pharmacological activities and clinical applications such as antianxiety, antitumor, anticonvulsant, cardiotonic and vasorelaxant. this contribution describes an electrochemical approach for the preparation of nanosized particles of phthalazine in high yields and very short reaction time. the method is ba...

cotton/polyester knitted fabrics as a major production of textile industry was treated with titanium dioxide nanosized particles. the treated fabric with nanosized tio2 became whiter with a good self-cleaning property. also the discoloration of reactive black 5 dye was studied and reported. the stabilization of tio2 on cotton/polyester knitted fabrics by citric acid (ca) with sodium hypophospha...

Determining the atomic-scale structure of nanosized particles remains a challenge and crucial goal for today’s science and technology. We investigate the atomic-scale structure of 3−8 nm Au particles obtained by a fast solution reaction and find it to be of a noncrystallographic icosahedral type, in particular, close to the particles’ surface. This noncrystallographic structure may well explain...

Mechanisms of the formation of nanoparticles of some B2 shape memory intermetallic compounds, glass-forming Zr-based alloy, and pure Ti obtained by spark erosion method in liquid nitrogen and argon are considered. One of peculiarity is a foam-like structure, which covers the surface of micron-sized particles that appear during spark erosion. Such morphology is related to the nanosized particles...

A deeper understanding of how the physical properties of particles regulate specific biological responses is becoming a crucial requirement for their successful biomedical application. To provide insights on their design and application, J774A.1 cells are exposed to particles with different diameters (430 nm, 1.9 μm and 4.8 μm), and the size effects on a series of cellular responses in macropha...

We used periodic mesoporous silica particles for molecular imprinting. The imprinted silica particles showed fast kinetic binding for the template due to their nanosized wall thickness and high surface area.

The objective of the this study was to compare concentrations of nanosized TiO2 at 0, 5, 20, 40, 60 and 80 mg L(-1) with bulk TiO2 for phytotoxic and stimulatory effects on fennel seed germination and early growth stage. After 14 d of seed incubation, germination percentage highly improved following exposure to 60 ppm nanosized TiO2. Similar positive effects occurred in terms of shoot dry weigh...

In this paper, we present the development of a method to accurately measure the positive and negative charge distribution of nanosized aerosols using a tandem differential mobility analyzer (TDMA) system. From the series of TDMA measurements, the charge fraction of nanosized aerosol particles was obtained as a function of equivalent mobility particle diameter ranging from 50 to 200 nm. The capa...

Carbon nanoparticles were prepared by refluxing the combustion soot of natural gas in nitric acid. Transmission ElectronMicroscopymeasurements showed that the resulting particles exhibited an average diameter of 4.8( 0.6 nm, and the crystalline lattices were consistent with graphitic carbons. CNMRand FTIR spectroscopic measurements further confirmed the presence of sp carbons in the form of ary...

We demonstrate and discuss acoustic vibrations in spherical shell particles. The particles consist of 38-nm-thick gold shells, sandwiched between an inner silica core of 456 nm in diameter and an outer silica shell of 10 nm in thickness. Employing standard and asynchronous optical sampling (ASOPS) ultrafast pump-probe experiments, we excite acoustic vibrations of the shells and detect the oscil...