Synthesis and Characterization of Sm3+ Doped CeO2 Nanoparticles

Samaria-doped ceria powders were prepared with varying doping concentrations (0.05, 0.5, 1.0, and 2.0). The nanopowders were synthesized using inorganic salts of cerium ammonium nitrate and samarium nitrate. Cerium ammonium nitrate was used as the precursor for ceria and samarium nitrate as the precursor for Sm3+. Dodecylamine was used as surfactant. The characteristics of the sample were investigated by X-ray diffraction studies, DSC-TG analysis, UV, IR, SEM images and BET surface area measurement. From the thermal studies the mass loss was found to be 16 %. XRD data showed the as-prepared sample has cubic fluorite structure and the broad peaks implied that the crystallite size is small (~ 8 nm). 2 mol% Sm3+ doped CeO2 sample heated at 500C possesses high BET surface area of 75 m2/g. FT-IR results showed that the nanopowders heated at 500oC was free from surfactan

Bianchijev kozmološki model tipa V u Lyrinoj mnogostrukosti

Bianchi type-V space-time is considered in the presence of a perfect fluid source in the framework of Lyra manifold with pressure equal to energy density (p=ρ). Some physical and geometrical properties of the model are discussed.Razmatramo Bianchijev prostor-vrijeme tipa V uz prisutnost perfektne tekućine u okviru Lyrine mnogostrukosti i jednak tlak i gustoću energije (p = ρ). Raspravljaju se neke fizičke i geometrijske odlike modela

Bianchijev kozmološki model tipa V u Lyrinoj mnogostrukosti

Bianchi type-V space-time is considered in the presence of a perfect fluid source in the framework of Lyra manifold with pressure equal to energy density (p=ρ). Some physical and geometrical properties of the model are discussed.Razmatramo Bianchijev prostor-vrijeme tipa V uz prisutnost perfektne tekućine u okviru Lyrine mnogostrukosti i jednak tlak i gustoću energije (p = ρ). Raspravljaju se neke fizičke i geometrijske odlike modela

An assessment of heavy metal accumulation in mangrove species of Bhitarkanika, Odisha, India

Mangroves are one of the most biologically important and productive ecosystemsin the world. Heavy metals are known to pose a potential threat to terrestrial and aquaticbiota. However, little is known on the toxic levels of heavy metals found in mangroveplants in India. To understand heavy metal toxicity, we analyzed heavy metalsaccumulation in sediment samples collected from surrounding root zone and in the leavesand stem of sixteen different plant species in the Bhitarkanika mangrove forest reserve inOdisha, India. Bhitarkanika mangrove ecosystem receives heavy metal pollution fromupstream areas of Brahmani and Baitarani estuary. Few studies were carried about thecapacity of mangrove plants to take up and store heavy metals in them. Hence, currentinvestigation was carried out to analyze trace metal accumulation in sediment and plantparts such as stems and leaves of different mangrove plants by Atomic AbsorptionSpectroscopy (Shimadzu, AA- 6300). The heavy metal concentration in sediment wasfound to be in the range of 5.99 to 92.00 μg/gm. Metals concentration in sediment samplesduring the study was in the order of accumulation : Zn>Cu>Pb. The accumulation ofheavy metal was higher in stem as compared to leaf

DOCUMENTATION OF TRIBAL CLAIMS FOR RHEUMATISM IN ODISHA, INDIA

Objectives: Odisha has been known as a rich source of valuable medicinal plants. Present work enumerates the indigenous knowledge on plant utilized as a natural remedy for rheumatism by the local or native peoples of Odisha.Methods: Information on curative values of different wild drug plant species has been gathered through personal interaction with tribal peoples. The study was conducted during the year 2010-2011 following standard ethno botanical methods.Results: A total of 144 plant species belonging to 57 families and 130 genera has been documented. The dominant families are Fabaceae, Acacthaceae, Apocyaceae, Euphorbiaceae, Malvaceae. Shrubs (34%) were the primary source of medicine, followed by herbs (32%) and trees (22%). High rate of frequency citation (Fc) of different medicinal plant species reveals that the current ethno botanical claims are strongly authenticated and needs to be further phytochemical and pharmacological investigation of herbal drug development program.Conclusions: Immediate steps should be taken not only to protect the medicinal flora of the state, but also to conserve the valuable traditional knowledge prior to extinction.Â

Spatial and temporal variation of phytoplankton in hot spring of Atri, Odisha, India

Seasonal dynamics of phytoplanktons along with various physicochemical parameters were recorded in the hot spring of Atri, Odisha during the year 2010-2011. The study was carried out to ascertain the phytoplanktons diversity in relation to the changing physico-chemical parameters in an extreme condition of the hot spring on seasonal basis. Total twenty eight genera having forty two species of phytoplanktons were recorded under the following classes, viz. Chlorophyceae, Cyanophyceae Bacillariophyceae and Euglenophyceae. Chlorophyceae was found to be dominating class contributing 40% of the total. The highest numbers of phytoplankton species were recorded during summer season with an average of 11, 3,000 cells/liter. Dominant species identified were Anabaena aequalis, Closterium ehrenbergii Meneghini ex Ralfs, Eudorina sp., Merismopedia punctata Meyen, Microcystis aeruginosa (Kützing) Kützing,  Navicula membranacea Cleve, Oscillatoria sp., Pediastrum simplex Meyen, Scenedesmus quadricauda Chodat. Correlation studies of phytoplankton with physicochemical variables indicate a significant positive correlation with chlorophyll-a, alkalinity and nitrate concentration at p≤0.01 and p≤0.05

Influence Of Plant Growth Regulators On Vegetative And Phenological Characters Of Okra (Abelmoschus Esculentus L. Moench) Cv. Utkal Gourav

A field experiment was conducted at All India Coordinated Research Project on Vegetable Crops, Odisha University of Agriculture and Technology, Bhubaneswar, during kharif 2021.Foliar spray of PGRs at various concentrations were given to okra crop cv. Utkal Gourav. The experiment was laid out in Randomized Block Design with three replications and eleven treatments viz., GA3 (100 ppm) (T1), GA3 (150 ppm) (T2), NAA (150ppm) (T3), NAA (200 ppm) (T4), Thiourea (250 ppm) (T5), Thiourea (500 ppm) (T6), Cycocel (200 ppm) (T7), Cycocel (250 ppm) (T8), Paclobutrazol (100 ppm) (T9), Paclobutrazol (200 ppm) (T10) and Control (T11). The foliar sprays of growth regulators were done at 15 & 30 days after sowing. All growth regulators significantly performed better as compared to control. The results revealed that NAA performed better with respect to plant height (148.66cm), internodal length (8.66 cm) and leaf area (237.60 Cm2) compared to control with 112.83 cm,5.45 cm & 174.69 Cm2 respectively. Cycocel 250 ppm recorded significantly better with respect to number of nodes per plant (21.53), number of branches per plant (3.47), number of leaves (32.74), leaf chlorophyll content (1.390 mg/100 g) and days to 50 % flowering (36.50). However the untreated control plot recorded number of nodes per plant (15.08), number of branches per plant (1.66), number of leaves (21.88), leaf chlorophyll content (1.071 mg/100 g) and days to 50 % flowering (42.10)

Characterization Of Glipizide-Loaded Polymethacrylate Microspheres Prepared By An Emulsion Solvent Evaporation Method

Purpose: The purpose of the present investigation was to formulate and evaluate microencapsulated glipizide produced by the emulsion – solvent evaporation method, Method: Microspheres were prepared using polymethacrylate polymers (Eudragit® RS 100 and RL 100) by solvent evaporation method and characterized for their micromeritic properties and drug loading, as well as by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy. In vitro release studies were performed in phosphate buffer (pH 7.4). Result: The resulting microspheres obtained by solvent evaporation method were white and free flowing in nature. The mean particle size of microspheres ranged from 420 - 660 μm and the encapsulation efficiencies ranged from 40.27 - 86.67 %. The encapsulation efficiency was also found to be dependant on nature of polymer used in the formulation. The infrared spectra confirmed the stable character of glipizide in the drug-loaded microspheres. Scanning electron microscopy revealed that the microspheres were spherical in nature. From the in vitro drug dissolution studies it was found that the sustaining effect of microspheres depended on the polymer concentration, amount of dispersant used and the type of polymer used in the formulation. The mechanism of drug release from the microspheres was found to be non-Fickian type. Conclusion: Eudragit® microspheres containing glipizide could be prepared successfully by using an emulsion solvent evaporation technique using polymethacrylate polymers, which will not only sustain the release of drug but also manage the complicacy of the diabetes in a better manner. Keywords: glipizide, Eudragit®, microspheres, controlled release, polymethacrylate.Tropical Journal of Pharmaceutical Research Vol. 7 (1) 2008: pp. 879-88