Carbon nanotube represent one of the best novel nanostructures which have different individual structures,morphologies and properties, a wide variety of synthetic methods have been developed to produce it and the properties for specific scientific studies or technological applications. Carbon Nanotube are one of the allotropes of carbon which can be described as a sheet of graphite rolled into a hollow cylinder constructed from hexagonal rings of carbon with diameters ranging from one to tens of nanometers, and with lengths up to micrometer.

Five transition metal complexes of Ni(II), Cu(II), Zn(II), Cd(II) and Sn(II) with {4-amino-5-(pyridyl)-4H-1,2,4-triazole-3-thiol}, as a ligand (L) has been prepared in alcoholic medium.The photostabilization activity of these compounds was determined by monitoring the carbonyl and hydroxylindexes, weight loss method with irradiation time. It was found that these indexes values increased with irradiation time and this increase depend on the type of additives. The surface morphology for these films was studied during irradiation time. The changes in viscosity average molecular weight of PS with...

This work was made to study the photochemistry of riboflavin and the kinetics of riboflavin degradation after exposure to UV-Vis light phosphate buffer solution at different pH interval (2-10) with the same concentration (5x10-5M ) was studied by the of UV-Vis spectrophotoscopy analyses, it showed that degradation increase as pH increase from pH (2-7)where the lumichrome a photoderivative forms in the acidic medium. a maximum degradation occurs at neutral pH (7). Then it began to decrease from pH (7-10). Where the lumiflavine (a photoderivative occurs at basic media) formed. We also...

Schiff's bases are the compounds, which contain -C=N- group. These compounds were named after the German chemist Hugo Schiff and are produced by reacting the aldehyde or ketone with primary amines (1), Structurally, a Schiff base (also known as imine or azomethine or anils is a nitrogen analogue of an aldehyde or ketone in which the carbonyl group (C O) has been replaced by an imine or azomethine group. Schiff bases are some of the most widely used organic compounds. They are used as pigments and dyes, catalysts, intermediates in organic synthesis, and as polymer stabilisers. Schiff bases are...

All commercial organic polymers will degrade in air when exposed to sunlight, although there is a very wide range of photo-oxidative susceptibilities. It is usually the absorption of near ultraviolet (UV) wavelengths which leads to bond-breaking reactions and the concomitant loss of useful physical properties and/or discoloration. Exposure to sunlight can have adverse effects on the useful great interest of plastic products. Ultraviolet (UV) radiation can break down the chemical bonds in a polymer. Photo-degradation causes cracking, chalking, color changes and the loss of physical properties....

High-throughput and high-content analysis of cultured cells or even small organisms are of imminent importance in drug discovery, toxicology and in individualized medicine. In medicine, the identification of tailored patient-specific therapy is important in cancer, chronic inflammation, infection and other diseases. High Content Screening was developed with the perspective of the history of the development of the automated DNA sequencers that revolutionized the field of genomics. Furthermore, HCS was based on a history of important developments in modern cytology. Cell damage caused by free...