3351–3355 Contents lists available at SciVerse ScienceDirect Journal of Magnetism and Magnetic Materials journal homepage: www.elsevier.com/locate/jmmm Investigation of magnetocaloric effect in La0.45Pr0.25Ca0.3MnO3 by magnetic‚ differential scanning calorimetry and thermal analysis M. Aparnadevi‚ S.K. Barik‚ R. Mahendiran n Department of Physics‚ 2 Science Drive 3‚ National University of Singapore‚ Lower Kent Ridge Road‚ Singapore-117 452‚ Singapore a r t i c l e i n f o abstract
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References: http://www.wisegeek.com/what-is-thermal-analysis.htm http://www.wisegeek.com/what-is-thermogravimetry.htm http://www.wisegeek.com/what-is-differential-thermal-analysis.htm http://www.tainstruments.com/product.aspx?siteid=11&id=10&n=1 http://www.intertek.com/analysis/dsc/ http://link.springer.com/article/10.1023%2FA%3A1010144230796?LI=true http://iopscience.iop.org/0022-3727/34/9/201
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The dissolution of the drug in different liquisolid formulations was performed in 500 ml simulated salivary fluid (phosphate buffer pH 6.8) maintained at 37 ± 0.5 ºC using the USP dissolution tester apparatus II‚ at a rotation speed of 50 rpm. Aliquots from the dissolution medium were withdrawn at 1‚ 2‚ 3‚ 4‚ 5‚ 6‚ 7‚ 8‚ 9‚ 10‚ 12.5‚ 15‚ 20‚ 25 and 30 minutes time intervals. The samples were changed with fresh dissolution medium of same amount to maintain a constant volume in the vessels. Samples
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Objective: In the present study‚ an attempt was made to improve the bioavailability of Zidovudine by formulating into Orodispersible tablets‚ as it has poor bioavailability and extensive pre systemic metabolism. Methods: In the present study‚ the mucilage extracted from Fenugreek seeds (Trigonella foenum-graecum) was used as superdisintegrant. The oral dispersible tablets were prepared by using wet granulation technique. A three factor two level (23) central composite design was employed for the
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This article was downloaded by: [78.39.229.183] On: 10 March 2013‚ At: 06:52 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House‚ 37-41 Mortimer Street‚ London W1T 3JH‚ UK Polymer-Plastics Technology and Engineering Publication details‚ including instructions for authors and subscription information: http://www.tandfonline.com/loi/lpte20 Thermal‚ Dynamic Mechanical‚ and Barrier Studies of Potassium Permanganate-LDPE
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Chapter 3 Test 3.1 and 3.3 Completion Complete each sentence or statement. 1. The state of matter that exists only at extremely low temperatures is called a Bose-Einstein ____________________. 2. When water boils‚ some of its molecules have enough _________________________ to overcome the attraction of neighboring molecules. 3. The ____________________ theory of matter states that all particles of matter are in constant motion. 4. During vaporization‚ a substance changes from
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Polymer Essay: Plexiglass Many of the glass screens and windows we see today are not really made of glass. They are made of plexiglass. Plexiglass is not related to the chemical structure of glass at all. It is an organic polymer. Today this polymer is used in all sorts of applications. The formation of plexiglass was begun in 1930‚ at McGi11 University by William Chalmers‚ a research student. He polymerized methacrylic ethyl ester and methacrylic nitirile‚ creating a clear plastic paste
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3.6.2. Hygroscopicity assessment of free films Free films were evaluated for hygroscopicity behavior to understand the contribution of lactose and sodium chloride on hygroscopicity‚ if any. It was found that HPMC SD and HPMC-LAC CP films were ‘moderately hygroscopic’ whereas HPMC-NaCl CP films were ‘very hygroscopic’. The percentage moisture content and classification of each sample as per Callahan et al. (Callahan et al.‚ 1982; Murikipudi et al.‚ 2013) has been listed in Table 5. 4. Discussion In
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Differential Scanning Calorimetry (DSC) was carried out to investigate the thermodynamic properties of CXB‚ different carriers‚ PMs and SD preparations. Their thermograms are represented in Figures (9-14). The thermogram of CXB in Figure (9) was characterized by single‚ sharp endothermic peak at 165±0.56°C which represents the melting point of CXB. Some researchers reported that CXB melting point ranging from 160.79–164.64°C (127)‚ and Paradkar A. et al. (2002) reported that sharp endotherm corresponding
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CALORIMETRY INTRODUCTION Calorimetry is used to determine the heat released or absorbed in a chemical reaction (1).Trustees of darmouth college states that (1) is used to determine the heat released or absorbed in a chemical reaction. To determine the heat released or absorbed in a chemical reaction an instrument called calorimeter is used. A calorimeter is an instrument used for measuring the heat of a reaction during a well defined process (2). Brucat states that (2) a calorimeter is an instrument
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