Fundamental of Synchrotron Radiations

Synchrotron radiations are emerging as a real-time probing tool for the wide range of applied sciences. Synchrotron radiations have unique properties because of their high brilliance, collimations, broad energy spectrum, and coherence power that break the limits to characterize the material properties than previous laboratory-based tabletop sources. The third-generation synchrotron light sources are capable of producing 1012 times higher brilliance than laboratory-based sources using insertion devices. In this chapter, the fundamental aspects of synchrotron radiations and their generation process have been discussed. The effect of insertion devices and the double-crystal monochromator (DCM) toward the X-ray beam optics has been also discussed

Optical Coefficients and PL Spectra with Variation in Ga-content in GaSeTe Thin Films: Visible Spectrum

The optical properties (transmission and emission) for Ga[x]Se[85 – x]Te[15](x = 0, 2, 6, 10, 15) semiconductor were studied using UV Visible spectra and PL Spectra of thermally evaporated thin films. Optical band gap is found to be decreasing with increased Ga-content in the compositions. Increase in refractive index, dielectric constants and absorption coefficient is observed in the wavelength region 550-850 nm.The fall in the optical band gap is explained with chemical bond approach and electro negativity. The increase in refractive index (n) is interpreted in association to the mean coordination number and cohesive energy. Direct band gap is found to be allowed in these thin films

Traditional and medicinal use of Barbaloin: potential for the management of various diseases

Barbaloin is the phytoconstituent which is obtained from the plant known as aloe vera.  As we all know aloe vera is the main curative medicinal plants, has been traditionally used as alternative treatment against the many skin diseases. Barbaloin extracted from the aloe vera plant which is physically light yellow colored powder. Extraction of barbaloin from the plant Aloe barbadensis Miller had been accomplished by the Soxhelt extraction, Batch extraction experiment and Ultrasound assisted extraction method (UAE). Barbaloin showed various kinds of therapeutic and medicinal properties like anti-diabetic, antioxidants, anti-cancer, anti-inflammatory and and anti-microbial. It also has good effect on cardiovascular system, test perception, enzyme or metabolism and bioavailability. Our Skin plays an important role in the development of skin diseases because there are many types of skin disorders are developed and the variety of disorders may result to dermatitis or they affect the social wellbeing of a person. Due to their good pharmacological activities, Barbaloin have great potential to treat the different type of skin disorders like Eczema, Psoriasis, Burns and wound, Acne, Dandruff, Frostbite, Rashes, Cold sores, Razor burn and Sunburn. To access the effective use of barbaloin there are various attempts have been experimented on the subject of their Pharmacological activities to check their effect on skin disease and the steps regarding the Isolation of barbaloin also has been made. We can examine their effects on chronic skin diseases. In this review article we discuss about the potential of barbaloin on skin disorders, medicinal importance or Pharmacological activities and their methods of extraction

Ferromagnetism in Multiferroic BaTiO₃, Spinel MFe₂O₄ (M = Mn, Co, Ni, Zn) Ferrite and DMS ZnO Nanostructures

Multiferroic magnetoelectric material has significance for new design nano-scale spintronic devices. In single-phase multiferroic BaTiO3, the magnetism occurs with doping of transition metals, TM ions, which has partially filled d-orbitals. Interestingly, the magnetic ordering is strongly related with oxygen vacancies, and thus, it is thought to be a source of ferromagnetism of TM:BaTiO3. The nanostructural MFe2O4 (M = Mn, Co, Ni, Cu, Zn, etc.) ferrite has an inverse spinel structure, for which M2+ ions in octahedral site and Fe3+ ions are equally distributed between tetrahedral and octahedral sites. These antiparallel sub-lattices (cations M2+ and Fe3+ occupy either tetrahedral or octahedral sites) are coupled with O2- ion due to superexchange interaction to form ferrimagnetic structure. Moreover, the future spintronic technologies using diluted magnetic semiconductors, DMS materials might have realized ferromagnetic origin. A simultaneous doping from TM and rare earth ions in ZnO nanoparticles could increase the antiferromagnetic ordering to achieve high-Tc ferromagnetism. The role of the oxygen vacancies as the dominant defects in doped ZnO that must involve bound magnetic polarons as the origin of ferromagnetism

Electrical properties of a-antimony selenide

This paper reports conduction mechanism in a-\sbse over a wide range of temperature (238K to 338K) and frequency (5Hz to 100kHz). The d.c. conductivity measured as a function of temperature shows semiconducting behaviour with activation energy $\Delta$E= 0.42 eV. Thermally induced changes in the electrical and dielectric properties of a-\sbse have been examined. The a.c. conductivity in the material has been explained using modified CBH model. The band conduction and single polaron hopping is dominant above room temperature. However, in the lower temperature range the bipolaron hopping dominates.Comment: 9 pages (RevTeX, LaTeX2e), 9 psfigures, also at http://pu.chd.nic.in/ftp/pub/san16 e-mail: gautam%[email protected]

Green Energy Applications of Hematite (α-Fe₂O₃), Magnetite (Fe₃O₄), and Maghemite (γ-Fe₂O₃) Nanoparticles Based Hydroelectric Cell

Recently invented hydroelectric cell (HEC) is emerging as a better alternative for green electrical energy devices. HEC is fabricated as to generate electricity via splitting of water into H3O+ and OH− ions without releasing any toxic product. In iron oxides, Hematite (α-Fe2O3), magnetite (Fe3O4) and maghemite (γ-Fe2O3) nanoparticles HEC are recently reported for their remarkable electrical response by splitting water molecules. Fe3O4 HEC 4.8 cm2 surface size has delivered 50 mA short circuits current. Li ions into Fe3O4 stabilize electrical cell response to 44.91 mA with open-circuit voltage 0.68 V. Maghemite based HEC delivered a maximum short circuit current 19 mA with emf 0.85 V using water 200 μL. Maximum off-load output power 27.6 mW has been delivered by 4.84 cm2 area hematite-HEC which is 3.52 times higher with 7.84 mW power as generated by Li-Mg ferrite HEC. Maximum electrical power 16.15 mW delivered by maghemite HEC is 0.58, 0.42 times lower than respective magnetite, hematite HECs. In more applicability of iron oxides, the multiferroic nanocomposites of BaTiO3 with 85% CoFe2O4 has been shown maximum short circuit current 7.93 mA and 0.7 V emf by sprinkling few drops of water on HEC surface. Li0.3Ni0.4Fe2.3O4 and Mg0.8Li0.2Fe2O4 HECs also have some remarkable results for green energy generation

Anaesthetic Management of A Case of Parkinson′s Disease for Emergency Laparotomy Using Enteral Levo-dopa Intraoperatively

Parkinson′s disease is a relatively common neurological disorder. Few case reports are available regarding optimal anaes-thetic management of patients with Parkinson′s disease. Here we present successful anaesthetic management of a case of suspected ileal perforation with Parkinson′s disease for emergency laparotomy. Enteral route of levo-dopa administration was used throughout general anaesthesia