Corrosion study of pipeline material for seabed sediment in tropical climate

Corrosive environments such as marine sediments can cause corrosion to steel pipelines at any time when certain conditions are met. Seabed sediment could cause severe corrosion damage due to its corrosiveness to the pipelines buried under it. Many consequences could take place in case if there is incident in oil/gas pipelines. Successfully identifying elements of corrosion in marine sediment would enhance the future of steel structure protection and monitoring systems. This article focuses on the behaviour of corrosion rate of steel located near shore environment and the aim is to determine the effect of sediment on corrosion of steel. To investigate that, simulated near shore sediment conditions have been used where the steel coupons buried in sediments which have different characteristics. Weight loss technique has been implemented to determine the weight loss rate of the steel specimens. Based on the results of this study, metal weight loss increases as the duration of exposure to seabed sediment environment become longer. The sea sediment simulated condition has given significant levels of corrosion. Conclusively, the corrosion rate of steel in seabed sediment located in tropical region is complicated and further studies are suggested

A Young Man with Multiple Pulmonary Cysts

Several diseases cause cystic or cyst-like parenchymal lung abnormalities including adult pulmonary Langerhan's cell histiocytosis (PLCH), lymphangioleiomyomatosis (LAM), emphysema, end-stage interstitial lung disease, and cystic bronchiectasis. Many of these diseases can now be diagnosed with high accuracy by the use of high-resolution computerized tomography (HRCT). In fact, HRCT of chest has proved a major breakthrough in the diagnosis of these diseases. We are presenting a young man with a cystic lung disease in which, the HRCT findings were virtually diagnostic of that disease. The clinical and HRCT findings of this disease along with its differential diagnosis are discussed in this paper

Enhanced spectrofluorimetric determination of the multitargeted tyrosine kinase inhibitor, crizotinib, in human plasma via micelle-mediated approach

Purpose: To quantify the multi-targeted tyrosine kinase inhibitor, crizotinib, in human plasma and bulk powder by highly sensitive micellar enhanced spectrofluorimetric procedure.Method: The developed procedure was based on measuring the fluorescence intensity of crizotinib (CRZ) in sodium dodecyl sulphate (SDS) micellar system at 404 nm after excitation at 271 nm. Validation of the developed procedure was carried out following ICH (International Council for Harmonization) guidelines.Results: Maximum fluorescence intensity (FI) was attained by addition of 0.2 mL SDS and 0.2 mL HCl (1N) to CRZ aliquots and then dilution with distilled water. There was a linear relationship between the FI of CRZ and its concentration over the range, 5 – 400 ng/mL, with limit of detection and of quantification of 1.857 and 5.628 ng/mL respectively. The developed procedure was successfully applied to assay CRZ in pure powder form and spiked human plasma with mean recovery of 100.68 ± 0.37 and 99.98 ± 0.20 %, respectively.Conclusion: The developed procedure is simple and sensitive, and can be applied to routine analysis of CRZ in pure powder form as well as in clinical laboratories for the determination of CRZ in plasma.Keywords: Crizotinib, Spectrofluorimetry, Micelle, Human plasma, Sodium dodecyl sulphat

Magnetic graphene oxide as adsorbent for the removal of lead(II) from water samples

Magnetic Fe3O4 nanoparticles were prepared on graphene oxide (Fe3O4/GO) in situ in a one step process. The obtained Fe3O4/GO was used as an adsorbent for the removal for Pb(II) from environmental water samples prior to flame atomic absorption spectroscopy measurement. The adsorption procedure was optimized as follows: 60 min adsorption time, 50 mL sample volume, solution pH 4.5, and 25 mg adsorbent dosage. Under the optimum conditions, the adsorption efficiency obtained was greater than 75% (C = 50 mg L-1). The adsorption isotherm of Fe3O4@GO magnetic adsorbent was studied for Pb(II) adsorption using two isotherm adsorption models namely Langmuir and Freundlich. The adsorption isotherm data fits well with Langmuir isotherm (R2 = 0.9988) rather than with Freundlich isotherm. The maximum adsorption capacity (qm) obtained was 86.2 mg g-1. The results signified that the prepared Fe3O4/GO nanocomposite has a great adsorptive ability towards the Pb(II) from environmental water samples

The Chromoelectric Dipole Moment of the Top Quark in Models with Vector Like Multiplets

The chromoelectric dipole moment of the top quark is calculated in a model with a vector like multiplet which mixes with the third generation in an extension of the MSSM. Such mixings allow for new CP violating phases. Including these new CP phases, the chromoelectric dipole moment that generates an electric dipole of the top in this class of models is computed. The top chromoelectric dipole moment operator arises from loops involving the exchange of the W, the Z as well as from the exchange involving the charginos, the neutralinos, the gluino, and the vector like multiplet and their superpartners. The analysis of the chromoelectric dipole moment operator of the top is more complicated than for the light quarks because the mass of the external fermion, in this case the top quark mass, cannot be ignored relative to the masses inside the loops. A numerical analysis is presented and it is shown that the contribution to the top EDM could lie in the range ($10^{-19}-10^{-18})$ ecm consistent with the current limits on the EDM of the electron, the neutron and on atomic EDMs. A top EDM of size $(10^{-19}-10^{-18})$ ecm could be accessible in collider experiments such as at the LHC and at the ILC.Comment: 17 pages, 6 figures. Accepted for publication in Phys. Rev.

Kajian Etnofarmasi Etnik Bungku di Kecamatan Bungku Tengah Kabupaten Morowali Provinsi Sulawesi Tengah

This study aims to find out and to inventory the types and parts of plants as well as to dig up information about ways of their utilization as remedy used by Bungku people “To Bungku”. It was conducted from August to December 2015 in Bungku Subdistrict, Central Bungku, Morowali Regency, Central Sulawesi. This research is a descriptive study using qualitative methods and snowball sampling technique on 12 informants through data collection by questionnaire. Results of this etnopharmacy study revealed that there were 62 species of medicinal plants divided into 34 familia. The most widely used plants came from familia Euphorbiaceae, Fabaceae and Zingiberaceae, each was as many as 8%. Parts of plant including roots, stems, leaves, flowers, fruits, seeds and bulbs were used in accordance with their function. Leaves were the ones used with the highest percentage (50%). Bungku people used medicinal plants to treat diseases such as kidney stone, diabetes, hemorrhoids, diarrhea, abscess, candidiasis, gout, cancer, hypertension, hypercholesterolemia, dyspepsia, cough, abdominal pain, malaria, hematuria, skin inflammation, headache, fever, bronchitis, dysentery, asthma, stroke, gallstones, urinary tract infections, broken bones, nail-punctured, wound ulcers, burns, hepatitis, appendicitis. Ways of the utilization were very diverse such as boiling then drinking the decoction; crushing then rubbing on the necessary skin; attaching to the body; squeezing then drinking the juice; and heating on the fire. Processing by boiling has the largest percentage, as much as 54

Relativistic mean field formulation of clustering in heavy nuclei

Very little is known about clustering in heavy nuclei and in particular the interaction between the correlated cluster nucleons and remaining core nucleons. Currently the phenomenological Saxon-Woods plus cubic Saxon-Woods core-cluster potential successfully predicts the alpha decay half-life and energy band spectra of a number of heavy nuclei. This model, however, lacks a microscopic understanding of clustering phenomenon in these heavy nuclear systems. A fully relativistic microscopic formalism is presented, which generates the core-cluster potential by means of the McNeil, Ray and Wallace based double folding procedure. The core and cluster baryon densities are calculated by using a relativistic mean field approach. The Lorentz covariant IA1 representation of the nucleon-nucleon interaction is folded with the core and cluster densities. Theoretical predictions of the ground-state decay half-life and positive parity energy band of 212Po are obtained with the relativistic mean field formalism and which are compared to the results from the phenomenological Saxon-Woods plus cubic Saxon-Wood core-cluster potential and microscopic M3Y interaction