Archives-June... 

The Corrosion inhibition of a inhibitor namely Zn complex of 1-(8-hydroxy quinolin-2yl-methyl) urea (Zn-HUF) in controlling corrosion of mild steel immersed in aqueous solution containing 60 ppm Cl- has investigated using weight loss method. The corrosion inhibition efficiency offered by 50 ppm of Zn-HUF is 74 %. The corrosion inhibition was observed due to the formation of more stable and compact protective film on the metal surface. Fluorescence spectral analysis was used to detect the presence of iron-inhibitor complex. Polarization study and Electrochemical Impedance spectra confirm the formation of a protective film formed on the metal surface.

Caliceal diverticula stones are rare. Their management is conditioned by the appearance of clinical signs. The treatment gold standard was initially open surgery. With the advent of SWL, PCNL and flexible uretero-renoscopy, treatment has become less and less invasive. Among these techniques, the choice depends on the localization and the size of the diverticula and stones. We report here the case of a patient with a superior caliceal diverticula stones treated by flexibleuretero-renoscopy and laser.

Child Second Language Acquisition is one of the sub-areas in second language studies. Bilingualism is also considered to be an advantageous concept in terms of social, economic and educational contributions. In child language acquisition, imperatives are among the commonly used utterances that ask children to carry out a certain direction. In this research it is aimed to give information about child SLA and to show the contributions of the use of ‘Imperatives’ in child SLA. The study is a qualitative narrative research design. At the end of three months, Eren is able to carry out the exercised directions in English.

This paper presents a study on the selection and optimization of the elevator system for commercial buildings. Since the elevator industry began in 1853, elevators become more and more common in people’s daily life. Now, elevator system design is an important part of commercial building service design. A good elevator system can contribute marks for the performance of commercial building. This study includes an assessment of the utilization of this vertical transportation to run the daily matters of the building productively and safely according to the regulations and standards. In addition, it will also look into the method to arrange the transportation in a building which has high-flow of people. 1st Avenue Penang, Malaysia is chosen as the observation site in this study. It is hoped that this study will provide some useful insight on the transportation system (elevators) in the commercial building.

The aim of the present study is to formulate and evaluate buccoadhesive compacts of Lacidipine. Compacts were prepared with different grades of polymers like HPMC, Carbopol and Ethyl cellulose by direct compression technique. Compacts were evaluated for weight uniformity, thickness, surface pH, mucoadhesive strength, in vitro residence time and in vitro release. Physicochemical properties and content uniformity were found well within limits. FTIR studies showed no evidence on interaction between drug, polymers and other excipients. Surface pH and swelling index was found in the range of 6.42 to 6.80 and 44.83 – 97.87 %. F2 formulation showed controlled drug release of 90.42% in 8h and selected as optimized formulation. Optimized compacts were not dislodged within 8h. In vivo mucoadhesion studies showed that compacts were retained for more than 8h. Mucoadhesive force was found in the range of 3.47 to 5.82 N. Stability studies has been be performed for 3 months on the optimized formulation concluded that there were no significant changes in drug content and in vitro dissolution characteristics than initial results. The results indicate that suitable compact of lacidipine HCl with in vivo residence time and control release could be formulated for commercial scale.

The cerebro-spinal tuberosity fractures (CT) are complex fractures. The existence of a dislocation of the head or fracture even worse prognosis. Several therapeutic alternatives have been proposed in this context. We report a case of fracture dislocation of the humeral head associated with a fracture of the humeral shaft in a matter of 79 years, treated by intramedullary antegrade nailing with self-stabilizing screws type TARGON Consolidation is achieved at 8 weeks, the fracture reduction is acceptable.

The degradation of Poly(ethylene terephthalate) and polystyrene foam waste could be accelerated using microbes. The aim of the study was to determine the degree of biodegradation of poly(ethylene terephthalate) films and Polystyrene foam by Fourier transform infrared (FTIR) spectroscopy. Further, chemical changes like formation of ester group was observed in PET powder when buried in soil under laboratory conditions. C = C bond stretching in PET powder inoculated in soil, sewage and cowdung was evident in this study. On inoculation of PET flakes in soil, sewage and cowdung, FTIR spectral analysis reveal C-H and C=C bond stretching. Except in PET flakes in cowdung , PET inoculation in soil and sewage elicited C=O bond stretching. PS powder inoculated in soil, sewage and cowdung underwent degradation which in reflected in the FTIR spectral analysis (C-O, bond stretching). Furthermore, PS powder on inoculation with sewage elicited C-H and C=C bond stretching, while in cowdung it resulted in O-H, C=O and C=C bond stretching. PS flakes when buried in soil, sewage and cowdung exhibited C=C bond stretching. In addition, O-H, C-H, C=O bond stretching was evident in PS flakes buried in cowdung. Thus fungal species (Aspergillus sp., Penicillium sp. and Fusarium sp) could be used as a biological agents to degrade PET and PS foam.

Complete Bipartite graph is the most important graph in design theory. There are several ways of constructing Complete Bipartite graph. In this paper we suggested an algorithm which can be used to construct Complete Bipartite graph using the Hadamard matrices. If the Order of Hadamard matrix is n then resultant Complete Bipartite graph is K_(n,n) where n is even . The proposed method was tested manually for n=2,4. Higher order Complete Bipartite graph were constructed using java program.

An environmentally benign and one-pot method for the synthesis of 1-naphthol azo dyes has been developed by using polymer-supported periodic acid (PPIA) as a new solid acid via grinding followed by a diazo coupling reaction by 1-naphthol under solvent-free conditions at room temperature. The obtained aryl diazonium salts supported on polymer (aryl diazonium polymer periodate), ArN2 +IO4 - were sufficiently stable to be kept at room temperature in the dry state. This method has the advantages such as: eco-friendly, heterogeneous reaction conditions, simple experimental procedure, high purity. The structures of the products have been characterized by several techniques using UV-Vis, FT-IR, 1H NMR, 13C NMR and mass spectra.

Our present study, we have reported the novel use of the aquous leaf extract of Gnetum ula to produce gold nanoparticles by reduction of AuCl4?ions. The phytochemicals present in the leaf extract served as effective reducing and capping agent. The gold nanoparticles obtained were characterized by UV–visible spectra, transmission electron microscopy (TEM) and X-ray diffraction (XRD). TEM studies showed the particles to be of various shapes and sizes. High-resolution TEM image confirmed a fcc phase and high crystallinity of the particles. The XRD patterns showed a (1 1 1) preferential orientation of the gold nanoparticles. Fourier transform infra-red spectroscopy (FTIR) measurements showed the GNPs having a coating of phenolic compounds indicating a possible role of biomolecules responsible for capping and efficient stabilization of the gold nanoparticles. AuNPs of Gnetum ula were having significant anti-arthritic activity.