Journal of Applied Chemical Research
Volume:7 Issue: 4, Autumn 2013

SiC powder preparation using Sol-Gel method. The size of nano-particles grows as the temperature exceeds 900° C. Size of probable agglomerations produced, is approximately less than 50nm. The surface is suitable to be used for dye solar cells. SiC emission occurs at wavelength area of 11.3μm or wave number area of 884.95 cm-1. In this paper probing the nature of annealed SiC samples in mixture, sintered, burned, and washed with Si, being removed. We can conclude that the efficiency in trapping solar energy increases.

In this study, Iran crude oil samples (K, L) were separated on the basis of solubility and polarity, resulting in saturates, aromatics, resins, and asphaltenes fractions. The fractions were analyzed by traditional open column chromatography, thin layer chromatography-Flame ionization detector in an Itroscan instrument (TLC-FID) and Gas chromatography with flame ionization detection for the determination of n-alkane and isoprenoid distribution in oil samples that are chosen as the most suitable structures for the identification and differentiation of crude oil samples and oil-oil correlations. The precursor organic matters of the analyzed oil samples of K, L are from a low salinity marine carbonate and reduced depositional environment. The studied oil samples were light and appeared to be mostly of type II, III kerogen mixture origin. The Koil sample is moderately mature (OEP and CPI are near 1).

The peel volatile constituents and juice quality parameters of four tangerine cultivars were investigated in this study. Peel flavor constituents were extracted by using cold-press and eluted by using n-hexane. Then all analyzed by GC-FID and GC-MS. Total soluble solids, total acids, pH value, ascorbic acid as well as density and ash were determined in juice obtained from tangerine cultivars. Forty-six, Twenty- five, Forty and thirty-four peel constituents in Dancy, Cleopatra, Ponkan and Atabaki cultivars respectively including: aldehydes, alcohols, esters, monoterpenes, sesquiterpenes and other components were identified and quantified. The major flavor constituents were linalool, limonene, γ-terpinene, (E)-β-ocimene, β myrcene, α-Pinene. Among the four cultivars examined, Dancy showed the highest content of aldehydes and Younesi showed the highest content of TSS. Since the aldehyde and TSS content of citrus peel are considered as two of the most important indicators of high quality, variety apparently has a profound influence on citrus quality.

In this research, CaO (calcium oxide) nanoparticles were synthesized by Co-Precipitation method in the absence and presence of Polyvinylpyrrolidone (PVP) via using calcium (II) nitrate. The Polyvinylpyrrolidone (PVP) was used as a capping agent to control the agglomeration of the nanoparticles. The synthesized samples were characterized via SEM, XRD and FTIR techniques. The average sizes of nanoparticles were determined by XRD data and Scherer equation. The decomposition reactions of 2-chloroethyl phenyl sulfide (2-CEPS) as a sulfurous pollutant has been investigated on the CaO nanoparticles (NPs)/ Polyvinylpyrrolidone (PVP) surface at ambient temperature and monitored via using gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) and FTIR spectrum. The GC analysis results revealed that 75% and 100% of 2-CEPS was found to be decomposed (adsorbed/destructed) in isopropanol and heptane solvents with weight ratio of 1:40(2 CEPS: CaO) after 12 h, respectively. On the other hand, these values for the weight ratios of 1:10, 1:20 and 1:30 were lower. The hydrolysis and elimination products; i.e. hydroxyl ethyl phenyl sulfide (HEPS) and phenyl vinyl sulfide (PVS) were identified by GC-MS respectively.

In this paper, the adsorption of Basic Blue159 (BB159) onto banana peel as a low-cost material was studied. At first, the banana peel was sieved. Later, banana peel particles were characterized by field emission scanning electron microscopy (FESEM), energy dispersive x-ray spectroscopy (EDXS) and Fourier Transform Infrared (FTIR) techniques. Batch adsorption experiments were carried out as a function of pH, contact time, initial dye concentration, the mass of adsorbent and mixing speed. Batch adsorption models, based on the assumption of the Pseudo-first-order, Pseudo-second-order, Elovich and Intraparticle diffusion mechanism, showed that kinetic data follow closely the pseudo-second-order model. Results indicate that banana peel could be used as an adsorbent to remove the cationic dyes from contaminated watercourses.

The research in the organic π-conjugated molecules and polymers based on thiophenehas become one of the most interesting topics in the field of chemistry physics and materials science. These compounds have become the most promising materials for the optoelectronic device technology.. The use of low band gap materials is a viable method for better harvesting of the solar spectrum and increasing its efficiency. The control of the band gap of these materials is a research issue of ongoing interest. In this work, a quantum chemical investigation has been performed to explore the optical and electronic properties of a series of different compounds based onthiophene and carbazole. Different electron side groups were introduced to investigate their effects on the electronic structure. The theoretical knowledge of the HOMO and LUMO energy levels of the components is basic in studying organic solar cells so the HOMO, LUMO and Gap energy of the studied compounds have been calculated and reported. These properties suggest these materials as a good candidate for organic solar cells.

One of the most important goals in medicinal chemistry is the development of new heterocyclic compounds with pharmaceutical activity. Thus, a novel series of the derivatives of benzimidazole were synthesized and the structures of all the synthesized compounds have been confirmed by IR, 1H- and 13C-NMR, Mass Spectroscopy and elemental analysis. The title compounds have been evaluated for antifungal activities against Candida albicans, Candida glabrata, and Candida krusei. Some of these compounds have been found to exhibit moderate to good antifungal activity when compared with commercially available fungicides.