Indian railway track analysis for displacement and vibration pattern estimation

This paper presents the dynamic response of the Indian Railway track. Two track models are considered for the dynamic response in terms of vertical displacement and acceleration at different wheel speeds, keeping the moving point load at constant magnitude. The rail is treated as a beam either on viscoelastic foundation or on the discrete elastic support system. The governing equation is implemented in finite element analysis using ANSYS 14.0. For the validation of result from system equation are compared with those available in published literature and the maximum deviation for displacement at the midpoint of rail is found to be within 5 %. Different wheel speed generates variation in displacement and acceleration of the rail track. The study can be viewed as the foundation for the comparison of FEA based simulation of rail track to specify its dynamic response useful to provide better safety and comfort to commuters

Peroksidacija lipida i antioksidativni status u psa mješovite pasmine s kožnim metastazama prenosivoga veneričnoga tumora - prikaz slučaja.

A metastatic form of cutaneous transmissible venereal tumor was diagnosed in a mongrel dog. The dog had non-fluctuating and ulcerating neoplastic nodules throughout the subcutis with a history of spontaneous regression and recurrence of new growths at different sites. A presumptive diagnosis was made based on fine needle aspiration cytology of neoplastic nodules and an impression smear of ulcerated lesions, which was confirmed by histopathology. Erythrocyte oxidant-antioxidant status revealed increased lipid peroxidation and decreased antioxidant enzymes, which might have been due to the direct influence of the tumor or by associated factors such as tumor necrosis and/or the inflammatory changes. Increased early apoptosis was observed in peripheral blood leukocytes. Treatment with Vincristin along with other supportive therapy yielded an unfavorable outcome due to the advanced stage of malignancy.Metastaze kože prenosivoga veneričnoga tumora dijagnosticirane su u psa mješovite pasmine. Ustanovljeni su nefluktuirajući i ulcerativni neoplastični čvorovi u potkožju, koji su spontano nestajali, ali uz pojavu novih na različitim mjestima. Sumnja na pojavu tumora bila je postavljena na osnovi citološkoga nalaza aspiriranoga tkiva novotvorina, a potvrđena histopatološkom pretragom materijala uzetog iz ulceracijskih promjena. Antioksidacijski status eritrocita pokazao je povećanu peroksidaciju lipida i smanjenu aktivnost antioksidacijskih enzima što može biti zbog izravnoga utjecaja tumora ili zbog drugih čimbenika kao što je tumorska nekroza i/ili upalne promjene. Pojačana rana apoptoza zabilježena je u leukocitima periferne krvi. Primjena vinkristina uz potporno liječenje drugim lijekovima nije dala zadovoljavajuće rezultate zbog uznapredovaloga stupnja zloćudnosti

XPS study on the correlation of magnetic properties and site occupancy of Al doped SrFe12O19

We have performed an X-ray photoelectron spectroscopy (XPS) study of SrFe12−xAlxO19 (0 ≤ x ≤ 2.4), and the results have been correlated to the magnetic properties measured using VSM technique. The coercivity of the parent compound increased from 5420 Oe to 7340 Oe with increasing the doping concentration of Al ions up to x = 1.2. The XPS data of Fe 3s spectrum show that the intensity of majority peak decreased with the doping of Al ion and it is associated with the magnetic moment. The XPS analysis of Fe 2p data in conjugation with the Fe 3s data suggests that the Al ions occupy the 2a site of the crystal structure up to x = 1.2, and beyond the dopant ions distribute at other occupation sites. The observed correlation between the spectral features of Fe 3s spectrum and the magnetic data suggests that XPS technique can also be used as a spectroscopic diagnostic tool to comprehend the influence of doping ion on the magnetic moment of spin up and spin down sublattice of ferrimagnetic structure

Chemical analysis of BaSO4 in barite bearing concentrates and beneficiation products by wavelength dispersive X-ray fluorescence spectrometry

The chemical analysis of Ba in barite bearing matrix (concentrates and beneticiation products) by wavelength dispersive X-ray fluorescence spectrometry is reported to be affected by spectral interference ofTi. The work suggests that the analysis is affected by the mineralogical heterogeneity leading to chemical heterogeneity of the secondary standards. Such heterogeneity is more probable in the samples having lower content of heavy minerals of high specific gmvity

Effect of Organic and Inorganic Fertilizer on Growth and Yield Attributes of Okra (Abelmoschus esculentus L.)

Research was conducted by using effective management application of Flyash, Azospirillum and inorganic fertilizer with objective to enhance the growth and yield of okra crop. The field experiment was carried out at the research farm of soil science and agricultural chemistry, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during Zaid season 2022. The experiment was laid out in Randomized Block Design (RBD) with 9 treatments replicated three times. Data were collected on plant height, number of leaves, number of branches, fruits per plants and yield. Results showed significant differences on all parameters such that the best plant height with the most leaves, high number of branches, greater number of fruits per plant and highest yield was registered in treatment with the combination of Flyash 25 t ha-1, Azospirillum 2 kg ha-1 with RDF 100: 60: 50 kg ha-1 indicating that the synergy by Azospirillum, Flyash and fertilizers improved growth and yield. The results are based on one season experiment, therefore further investigation is recommended to substantiate the findings

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Cs₂CO₃ as a source of carbonyl and ethereal oxygen in a Cu-catalysed cascade synthesis of benzofuran [3,2-c] quinolin-6[5-H]ones

The simultaneous construction of C–C, C–O and C–N bonds utilizing Cs2CO3 as a source of both carbonyl (CO) and ethereal oxygen and a cascade synthesis of benzofuro[3,2-c]quinolin-6(5H)-one have been achieved using a combination of Cu(OAc) 2 and Ag2CO3. A plausible mechanism has been proposed for this unprecedented transformation

Degradation of Congo red pollutants using microwave derived SrFe12O19: An efficient magnetic photocatalyst under visible light

The photocatalytic behavior of magnetic SrFe12O19 and SrFe11.4Al0.6O19 under visible and sun lights was evaluated using Congo red (CR) as a model dye. Synthesis of pure and Al substituted SrFe12O19 by microwave combustion method followed by calcination at 950 degrees C yielded single phase materials having particle sizes and surface areas in the ranges similar to 120-180 nm and 3.5-5.5 m(2)/g, respectively. The experimental band gaps (1.5-1.56 eV), derived from UV-Vis diffuse reflectance spectra, matched well with those calculated (1.86-1.91 eV) theoretically from electronic structure data using density functional theory. Both the samples efficiently degraded CR under visible/ sun lights and the low band gap of the materials was mainly responsible for the activity. Slightly higher (similar to 10%) activity of SrFe11.4Al0.6O19 was primarily attributed to Al doping which prevented the electron-hole recombination. Reasonably high values of magnetization (similar to 52 emu/g at 300 K) was beneficial in separating the catalysts from the reaction cell at a low strength magnetic field after the reaction. These magnetic photocatalysts may be exploited further for the degradation of other dyes for their possible use in remediation of wastewater. (C) 2013 Elsevier B.V. All rights reserved

Ruthenium(II) Catalyzed Regiospecific C–H/O–H Annulations of Directing Arenes via Weak Coordination

Ruthenium­(II) catalyzed oxidative C–H/O–H annulations have been demonstrated using two different directing arenes viz. 2-arylquinolinone and 2-arylbenzoxazinone with internal alkynes. Regiospecific annulations have been observed for both directing arenes via the assistance of weaker carbonyl oxygen in the presence of a stronger nitrogen-directing site. In this substrate-controlled convergent protocol the weaker directing group dictates the annulation path

Peroxide-Free Pd(II)-Catalyzed Ortho Aroylation and Ortho Halogenation of Directing Arenes

A Pd­(II)-catalyzed peroxide-free ortho aroylation of directing arenes has been developed via cross dehydrogenative coupling (CDC) in the presence of the terminal oxidant Cu­(OAc)₂·H₂O. Ortho aroylation of directing arenes proceeds via decarbonylation of the in situ generated phenyl glyoxal, which is obtained from 2-acetoxyacetophenone in the presence of the oxidant Cu­(OAc)₂·H₂O. However, changing the oxidant to CuX₂ (X = Cl, Br) provided exclusive di-ortho-halogenated 2-arylbenzothiazoles. During the halogenation, CuX₂ served the dual role of a halogen source as well as a co-oxidant