Pharmaceutico analytical study of Shodhita Shilajatu

Background: Shilajatu or Adrija is one of the Maharasa, which is considered as a wonderful medicine in Ayurveda. It is named as it comes out of the stones heated by the sun in summer in the form of thick blackish exudation having many shades. Since it contain stone, mud, wood, sand and various physical and metallic impurities, Shodhana (Purification) of Shilajatu is a mandatory procedure. It has been used as a prime ingredient in many formulations mainly for Prameha, Sotha, Pandu Roga, Kshaya, Swasa, Pliha Vrudhi, Jwara, Agnimandya, Apasmara, etc. Objectives: Shodhana of Ashudha Shilajatu and Physico chemical analysis of Shodhita Shilajatu. Materials & Methods: Bhringaraja Swarasa for Shodhana of Shilajatu. Results:It took 8 days for completion of Shilajatu Shodhana. XRD Analysis report indicates that the sample Shilajatu was Amorphous material. Conclusion: Total yield of Shodhita Shilajatu was 99.6%. The Sample of Shilajatu was found to be Amorphous material in XRD Analysis hence crystal structure was not identified

A low temperature path to the preparation of ultrafine ferrites

Ultrafine ferrites, {MFe_2O_4} where M = Mg, Mn, Fe, Co, Ni, and Zn, were prepd. by the combustion/decompn. in a melt of solid soln. precursors, hydrazinium metal hydrazinecarboxylate hydrates, {N_2H_5M_1}/{3Fe_2}/{3(N_2H_3COO)}3.{H_2O} (M = Mg, Mn, Fe, Co, Ni, and Zn). The precursors decomp. at low temps. (75-200°) with the evolution of large amts. of gases. Ultrafine ferrites having particle sizes 6-22 nm and surface area 100-140 {m^2}/g were obtained and characterized by x-ray powder diffraction, Moessbauer spectra, particle size anal., and surface area measurements

Synthesis and characterization of a new sulphate derivative of hydrazine, N2H5HSO4

Hydrazinium(1 +) hydrogensulphate, N2H5HSO4, has been prepared for the first time by the reaction of solid ammonium hydrogensulphate with hydrazine monohydrate. The compound has been characterized by chemical analysis, infrared spectra, and X-ray powder diffraction. Thermal properties of N2H5HSO4 have been investigated using differential thermal analysis and thermogravimetric analysis and compared with those of N2H6SO4 and (N2H5)2SO4

Combustion synthesis and properties of the NASICON family of materials

The fine-particle NASICON family of materials, MZr2P3O12(where M = Na, K, ½Ca and ¼Zr) and NbZrP3O12, have been prepared by the combustion of aqueous heterogeneous mixtures of stoichiometric amounts of metal nitrate, zirconyl nitrate, niobium phosphate, diammonium hydrogen phosphate, ammonium perchlorate and carbohydrazide (CH) at 400 °C. The formation of NASICON materials was confirmed by powder X-ray diffraction (XRD), IR, solid-state (31P) NMR spectroscopy and thermal expansion coefficient measurements. The combustion-synthesized NASICON powders have an average agglomerate size of 9�13 µm with a specific surface area varying from 8 to 28 m2 g�1. The powders pelletized and sintered in the range 1100�1200 °C for 5 h achieved 95�97% theoretical density and showed fine-grain microstructure. The coefficient of thermal expansion of a sintered compact was measured up to 500 °C and ranged from �1.5 × 10�6°C�1 to 1.0 × 10�6°C�1 depending on the composition

Combustion Synthesis of Metal Chromite Powders

Fine-particle metal chromites (MCr2O4, where M = Mg, Ca, Mn, Fe, Co, Ni, Cu, and Zn) have been prepared by the combustion of aqueous solutions containing the respective metal nitrate, chromium(III) nitrate, and urea in stoichiometric amounts. The mixtures, when rapidly heated to 350°C, ignite and yield voluminous chromites with surface areas ranging from 5 to 25 m2/g. MgCr2O4, sintered in air at 1500°C for 5 h, has a density of 4.0 g/cm3

Combustion Synthesis and Properties of Fine-particle Dielectric Oxide Materials

Fine-particle dielectric oxide materials, $MTiO_3, MzrO_3$, (where M = Ca, Sr, Ba and Pb), $Pb(Zro_{0.53},Tio_{0.47})O_3$, and $Pb_{0.92}La_{0.08}(Zr_{0.65}Ti_{0.35})_{0.98}O_3$ have been prepared by the combustion of an aqueous solution, containing stoichiometric amounts of the corresponding metal nitrate and tetraformyl triazine mixture, at $350^0C$ for a few minutes. The combustion-derived dielectric oxides are fine and have a large surface area $(12-30 m^2 g^{-1})$. The powders, when pelletized and sintered at $1200^0C$ for 1 h achieved a 92-95% theoretical density

Not Available

Not AvailableThe present study aimed to document details about traditional practices adopted for restraining camel in Rajasthan. The information was collected by discussing villagers of the study area using the “Transect walks” method of the Participatory Rural Appraisal (PRA) technique from August 2014 to September 2015. The study revealed that restraining practices vary with age of the animal and purpose of restraining. Homemade rope halter is primarily used for restraining young camels, while use of nose-peg and nose-rings are common techniques used in adult animals. Tying fore or hind legs with rope is frequently used for restraining animals in standing or sitting position.Not Availabl

The Nature of Water in Hydrazine Salt Hydrates

Infrared spectra, differential thermal analysis, and conductivity studies have been carried out to determine the nature of water of constitution in hydrazine salt hydrates. The possibility of water being present as the oxonium ion, $H_3O^+$, has been investigate

Combustion synthesis and properties of strontium substituted lanthanum manganites La_1_-_xSrxSr_xMnO3MnO_3 (0\leq x\leq0.3)

Strontium substituted lanthanum manganites La1-xSrxMnO3 (x = 0, 0.1, 0.16, 0.2 and 0.3) have been prepared by a solution combustion process using lanthanum nitrate, strontium nitrate and manganese nitrate as oxidizers and oxalyl dihydrazide as fuel at 300 degrees C in a pre-heated muffle furnace. As-formed lanthanum manganites are X-ray crystalline showing cubic symmetry. The cubic LaMnO3, with 36% Mn4+ changes to a rhombohedral phase (Mn4+=28%) on calcination at 1000 degrees C. The surface area and average agglomerated particle size of the as-formed manganites are in the range 12-19 m(2) g(-1) and 5.4-8.0 mu m, respectively. Sintering, thermal expansion and de electrical conductivity measurements of La(Sr)MnO3, have been carried out. Strontium substituted lanthanum manganites achieve > 80% theoretical density after sintering at 1350 degrees C for 4 h and the percentage theoretical density decreases with increasing strontium content. The thermal expansion coefficient of La(Sr)MnO, increases with increasing Sr2+ content and La0.84Sr0.16MnO3 shows a highest conductivity value of 202 S cm(-1) at 900 degrees C in air

Synthesis, characterization and X-ray structure of hexahydrazinium diuranyl pentaoxalate dihydrate, (N2H5)6(UO2)2(C2O4)5·2H2O

A new hydrazinium uranyl oxalate complex (N2H5)6[(UO2)2(C2O4)5]·2H2O has been prepared and characterized by chemical analysis, infrared, visible spectra and TG-DTA. The single crystal X-ray structure of the complex shows the presence of discrete N2H5+ cations, water molecules and [(UO2)2(C2O4)5]6− anions. In the anion, the linear uranyl groups are coordinated by two chelating bidentate oxalates and one bridging oxalate which lies on the center of symmetry between the two uranyl groups. The coordination polyhedron around each uranium atom is approximately a pentagonal bipyramid