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524 articles for “crystallization”
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Studies on Electrical and Thermal Transport of InN based on Two Layer Model
Abstract: InN, a material of huge potential in device applications, is grown on sapphire substrate. But due to the high lattice mismatch between the sapphire and InN, the large number of dislocations develops near the interface between the two materials. However, the density of threading dislocation falls sharply in the bulk layer. The charge density has also similar variation. Therefore, the bulk InN crystal may be treated to be consisting of …
Published in Research & Reviews : Journal of Physics · Vol. 2, Issue 2, 2013 · pp. 17–21 Read article
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Preparation and Structural Characterization of PVP-CH3COONa Based Polymer Films
Abstract: PVP based polymer electrolyte films were prepared by dissolving sodium acetate with different wt.% compositional ratios by solution cast technique. XRD revealed the crystalline phase of the prepared samples. XRD pattern demonstrated a wide peak at 29.35° attributed to the host polymer indicating orthorhombic cross section showing semicrystalline phase. FTIR and Raman studies affirmed to identify the functional group of the materials, bond formation between the dopant salt and the …
Published in Research & Reviews : Journal of Physics · Vol. 7, Issue 2, 2018 · pp. 25–31 Read article
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A Study on the Effect of Perlite Nanoclay in PVdF-co-HFP/Li-BETI Composite Eletrolytes by XRD AC Impedance and FTIR Studies
Abstract: In the present study, mica family of phyllosilicates, the perlite nanoclay (80–190 nm) effect as a filler in consonance with EC:DMC (1:1) v/v ratio on PVdF-co-HFP-Li-BETI matrix has been investigated by ac impedance, XRD and FT-IR vibrational spectroscopy. The ionic conductivity of the order of 10-7–10-4 Scm-1 has been observed at the minimum participation of clay platelets is noted than its huge presence the non-polar phase of the PVdF has …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 1, 2019 · pp. 58–72 Read article
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Influence of Al2O3 Nanofiller on Morphological and Discharge Studies of PVP: CH3COOK Films
Abstract: Nanocomposite polymer (NCP) films were prepared by doping potassium acetate with polyvinyl pyrrolidone (PVP) by complete dispersion of aluminum oxide (Al2O3) with different wt% proportions by using solution-casting method. The acquired NCPs films were characterized systematically. The crystalline structure of the prepared NCPs films was confirmed by XRD. The little agglomeration and grain sizes involved in the films were analyzed by SEM. The energy bandgap values were observed to be …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 1, 2019 · pp. 20–25 Read article
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Synthesis and Characterization of NiFe2O4 Nanoparticles and Environmental Remediation
Abstract: In the present study, nickel ferrite nanoparticles (NFNPs) doped with copper was synthesized by chemical co-precipitation method (CBD) and characterized for phase composition and magnetic properties by x-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results confirmed the formation of Ni0.5Cu0.5Fe2O4 with the average crystallite size (D) 15.45 nm and 18.14 nm and saturation magnetization (Ms) were observed as 16.16 Gauss and 22.58 Gauss at 300˚C and 500˚C temperature …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 2, 2019 · pp. 108–111 Read article
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Separation of gas bubbles from a fluid in microgravity
Abstract: The paper presents the constructed device and developed method of gas bubbles separation from fluid using the specially created temperature gradient in a fluid in the conditions of microgravity, which differs by simplicity of a construction, economically high efficiency and productivity, and can be successfully used to separation of gas bubbles from a fluid in various technological systems on the international space station. Such technological systems include processes that occur …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 9, Issue 1, 2020 · pp. 23–31 Read article
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A New Approach of Synthesis Fe-Substituted Bi-2223 Superconductors
Abstract: Generally, the Bismuth based high temperature superconductors are utilizing in three phases as Bi-2201, Bi-2212 and Bi-2223. These have different transition temperature according to superconducting phase. Here, we studied about Bi-2223 phase by using complex Bi2Sr2Can-1 (Cu1-xFex)3O10+δ where n = 3. In this complex, we has been doped iron in Coper (Cu) site (x = 0.07%). This sample was prepared by solid state reaction method. The planetary Ball mill was …
Published in Research & Reviews : Journal of Physics · Vol. 10, Issue 3, 2021 · pp. 22–29 Read article
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Solid Self Nanoemulsifying Tablets: Statistical Optimization by 23 Factorial Designs
Abstract: The objective of the current research was to enhance the solubility of poorly water soluble drug i.e. atorvastatin calcium, by self nanoemulsifying drug delivery system (SES) and formulating it as tablets using 23 factorial designs. The prepared liquid SES were adsorbed onto aerosil which acts as carrier. The 23 factorial designs were employed to optimize the concentration of micro-crystalline cellulose, PVP and sodium starch glycollate. The observed values were in …
Published in Research & Reviews: A Journal of Drug Design & Discovery · Vol. 4, Issue 2, 2017 · pp. 1–7 Read article
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A Review of Formation of Oxygen-Related Donors (ODs) and Impurity Concentration in Step-Annealed Czochralski Silicon
Abstract: Czochralski (CZ) silicon being one of the two methods of silicon crystallization, the one that is used commercially for device fabrication, needs to be studied more closely. Hence, the Generation and behaviour of thermal donors (TD) and new donors (ND) as a result of pre-annealing at moderate temperature 480°C of carbon-rich boron-doped (p-type) CZ-silicon has been studied here, as function of annealing time by Hall studies and resistivity measurements in …
Published in Research & Reviews : Journal of Physics · Vol. 12, Issue 3, 2023 · pp. 1–6 Read article
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Rapid Biosynthesis of Silver Nanoparticles of Flower-like Morphology from the Root Extract of Saussurea lappa
Abstract: With the emergence of nanomedicine, nanobiotechnology, and nanopharmacotherapeutics, there has been a rising demand of nanomaterials. Silver nanoparticles (AgNPs) finds immense applications for drug delivery, biomedical sciences, catalysis, etc. Numerous industries are at present synthesizing therapeutic AgNPs to meet the global demand. By using chemical methods, which are very cost-effective to produce these materials, are quite hazardous, environment polluting, produce harmful byproducts, and have several other alarming aspects. The extract …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 5, Issue 1, 2018 · pp. 20–24 Read article
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Enhancement of Aqueous Solubility of Etoposide Using Solid Dispersion Technique
Abstract: Objective: The objective of present research work was to enhance the aqueous solubility of Etoposide using solid dispersion technique. Methods: Formulation of solid dispersion by using different polymers and their different ratio with the used of solid dispersion technique. Solid dispersion formulation F-1 to F-9 were prepared by using different type and different concentration of polymers like PEG-6000, PEG-4000 poloxomer 407 and ethanol respectively. Results: The solid dispersion formulation were …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 9, Issue 1, 2019 · pp. 29–37 Read article
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Pharmaco-Nutraceutical and Chromatographic Study of Wattakaka Volubilis (Linn. f.) Stapf. Leaves
Abstract: Wattakaka volubilis (Linn.f.) stapf. (Asclepediaceae), twinning shrub, is used as a source plant of Jeevanti, an established drug of Ayurveda. Its leaves are used by the tribal people as a source of vegetable. The present work has been undertaken, to establish the necessary pharmacognostical, nutraceutical, physicochemical and HPTLC characters of leaves of Wattakaka volubilis following standard procedures. Results showed that the leaves are simple, petiolated, opposite, cordate to ovate, hispidly …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 1, Issue 2, 2014 · pp. 23–28 Read article
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IN SILICO EVALUATION OF INHIBITORY POTENTIAL OF SOME COMMERCIALLY AVAILABLE FLAVONOIDS AGAINST BETA- SECRETASE IN THE MANAGEMENT OF ALZHIEMER’S DISEASE
Abstract: In a continuing effort to develop multitargeted compounds as potential treatment agents against Alzheimer's disease (AD), a certain commercially available flavonoids were evaluated against crystal structure of beta-secretase enzyme using in silico docking studies. In this perspective, flavonoids like apigenin, galangin, gallocatechol, genistein, luteolin, myricetin, and theaflavin were selected. AutoDock 4.2 software was used for the in-silico docking studies which possess the principle of Lamarckian genetic algorithm. In the docking …
Published in Research & Reviews: A Journal of Drug Design & Discovery · Vol. 6, Issue 2, 2019 · pp. 30–35 Read article
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Formulation and Evaluation of Gastro retentive Effervescent Floating Tablets of Famotidine: Effect of Formulation Variables and In Vitro In Vivo Evaluation
Abstract: Gastro retentive effervescent floating tablets of famotidine were developed in an attempt to sustain the drug release as well as to prolong the presence of dosage form in the stomach or upper small intestine until drug is completely released in desired period of time from the formulation with special emphasis to the effect and concentration of different polymers on drug release and floatation. Tablets were prepared by direct compression method …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 2, Issue 3, 2015 · pp. 13–29 Read article
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A Comparative Pharmacognostical and Pharmaceutical Study of Haritaki (Treesa) and Gomutra Haritaki w.s.r to Pancha Mahabhuta Composition
Abstract: Haritaki is considered as king of the medicine. It is described as prime ingredient in many formulations with different indications. Among them, Gomutra Haritaki is processed form of Haritaki which has additional qualities over Haritaki. Maintaining quality standard is must in the era of increasing demand for traditional medicines. The present study was aimed to compare pharmacognostical and pharmaceutical profile of Gomutra Haritaki with Haritaki (Treesa) alone. Haritaki (Treesa) and …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 2, Issue 3, 2015 · pp. 1–10 Read article
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Formulation Development and Evaluation of Furosemide Loaded Solid Lipid Microparticles
Abstract: Furosemide is a loop diuretic because of having very low half-life, low oral bioavailability, degraded in gastric juice; it was chosen to formulate as the solid lipid microparticle (SLMs) to overcome above. In this study, an attempt was made to improve the oral bioavailability of furosemide by preparing SLMs using stearic acid (SA) and cetostearyl alcohol (CsA) as lipid polymers by hot homogenization method at different drug: polymer ratios (1:5, …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 6, Issue 2, 2019 · pp. 6–18 Read article
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Improved Intestinal Absorption and Bioavailability Enhancement of Rosuvastatin Calcium via Proliposome Powder
Abstract: The main objective of the present study was to develop proliposomal formulations to enhance the oral bioavailability of rosuvastatin calcium by improving solubility, dissolution and/or intestinal permeability. Proliposomal powder formulations were prepared with drug varying the Phospholipon 90H and cholesterol ratio in the range of 1:0 to 1:1 using pearlitol SD200 as carrier by film deposition method. The prepared proliposomal powder was filled into capsules. The bioavailability enhancement of proliposomes …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 7, Issue 3, 2020 · pp. 23–40 Read article
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Synthesis and Characterization of Silver Nanoparticles by using Aqueous Leaf Extract of Tecomella Undulata (SM.) seem. and their Antibacterial Properties
Abstract: Abstract The efficient protocol for bio-synthesis of silver nanoparticles (AgNPs) using Tecomella undulata leaves was developed. The present study revealed that bio-active compounds and secondary metabolites present in the aqueous extract function as stabilizing agent for AgNPs. UV-Visible spectro-analysis and FTIR confirm the presence of bioactive compounds and TEM, EDX and XRD studies confirm the crystalline nature, structure and surface morphology of silver nanoparticles produced from the plant Tecomella undulata. …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 7, Issue 2, 2020 · pp. 5–13 Read article
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Application of Prodrug to Improve Skin Permeability: A Review
Abstract: Administration of drug via skin has some limitations such as skin barrier, solubility of drug and partition coefficient etc. Stratum corneum which is an outer skin layer, acts as a barrier to the skin. Thus, prodrug has some applications to improve skin permeability. Prodrugs are defined as the compounds which are initially inactive but covert into their active form when reacted with several chemicals or enzymes at particular active site …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 8, Issue 1, 2023 · pp. 1–11 Read article
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Anatomical Descriptive Research Studies on the Young and Old Stems of Urena lobata Linn
Abstract: Urena lobata Linn (usually known as Caesar weed), which has a place with the group of Malvaceae, is dispersed all over India. This spice is stuffing in nature and goes under the bush classification (60 to 100 cm long). The plant contains flavonoids and flavonoid glycosides like, alkanes, β-sitosterol and shame sterol. Different concentrates of the leaves and roots are utilized in natural medication to treat various afflictions, for example, …
Published in Research & Reviews: A Journal of Pharmacognosy · Vol. 7, Issue 3, 2020 · pp. 1–6 Read article