Strong interrelationship between anomalous electric-field induced lattice strain along non-polar direction and domain reorientation in pseudorhombohedral piezoelectric ceramic BiScO3-PbTiO3

The lattice strain and domain switching behaviour was investigated as a function of cyclic field and grain orientation for a pseudorhombohedral composition of the high Curie point piezoelectric system xBiScO3 - (1-x)PbTiO3 (x = 0.40) by in-situ electric field diffraction technique with high energy synchrotron x-rays. Along the field direction, the system exhibts five time large strain along 100 as compared to the 111 direction. A one-to-one correspondence between the 200 lattice strain and the 111 domain switching suggests a strong correlation between the two phenomena.Comment: 11 pages, 7 figure

VALIDATED STABILITY-INDICATING HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD FOR THE ESTIMATION OF TORSEMIDE

Objective: This assessment depicts the strength of exhibiting reverse-phase high performance liquid chromatography (RP-HPLC) method for the estimation of torsemide in pharmaceutical estimation structures. Methods: In the present work, total protein-HPLC technique has been produced for the estimation of torsemide active pharmaceutical ingredient (API). Constrained degradation HPLC strategy was created with versatile mobile phase of methanol:water in the proportion of 90:10 v/v. The stream pace of 1 ml/min was utilized on Inertsil ODS 3V segment (250 mm×4.6 mm, 5 μm molecule size). Results: The retention time of torsemide was seen at 8.267 min, method was validated for all validation parameters as per the International Council for Harmonization guidelines. The linearity range was 10–60 μg/ml, correlation coefficient was 0.9993, and percentage relative standard deviation in the precision studies was <2%, with percentage recovery 100.56–101.03 (within acceptable range of 98–102%). The assay result was found to be 100.88% (i.e., within 95–105%), passes the specifications for robustness parameters. Limit of detection of torsemide was found to be 0.0162 μg/ml and limit of quantitation of torsemide was found to be 0.0534 μg/ml. Conclusion: The medication was exceptionally delicate to antacid pursued by at risk to corrosive, photolytic, warm, and oxidative conditions. The created and approved method showing HPLC technique is observed to be direct, exact, precise, explicit, and powerful. Henceforth, the technique can be utilized routinely for the estimation of torsemide API

Correlation between enhanced lattice polarizability and high piezoelectric response in BiScO3-PbTiO3

Piezoelectric and ex situ electric-field induced structural studies were carried out on closely spaced compositions in the morphotropic phase boundary region of (1 - x) PbTiO3-(x)BiScO3. While the common approach of zero field structural analysis failed to provide a unique relationship between the anomalous piezoresponse of x = 0.3725 and structural factor(s), ex situ study of electric-field induced structural changes revealed that the composition exhibiting the highest piezoelectric response is the one which also exhibits significantly enhanced polarizability of the lattices of both coexisting (monoclinic and tetragonal) phases. The enhanced lattice polarizability manifests as a significant fraction of the monoclinic phase transforming irreversibly to the tetragonal phase after electric poling. DOI: 10.1103/PhysRevB.87.06410

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Not AvailableA heterotrophic strain ACM-1, isolated from Pangasius spp fish farms showed an ability to convert ammonium to nitrate under aerobic conditions. Based on the molecular phylogenetic analysis 16S rRNA gene sequence ACM-1 matched similarity to Achromobacter xylosoxidans (100%). ACM-1 showed amplification for Betaproteobacterial 16S AOB gene (465 bp) confirming the characteristic feature of ammonia oxidation. Sodium pyruvate (1%) was confirmed as the probable carbon source for the luxurious growth of Achromobacter xylosoxidans among the six carbon sources tested. At 30oC, 5% preculture and 120 rpm in shaker, ACM-1 could able to remove 100% ammonium within 36h. The ammonium removal rate was reported to be 1.3 NH4 + -N mg L -1 h -1 at 30oC. The rate of ammonium removal at different temperature (20oC, 25oC, 37oC) ranged between 0.9 to1.33 NH4 + -N mg L-1 h -1 . The nitrite produced during this experiment remained at constant rate and nitrate concentration increased after the initial hours of experiment. Therefore, the results demonstrate that Achromobacter xylosoxidans ACM-1 can remove ammonium in batch cultures and could be applied in aquaculture farms as a biological nitrifier.Not Availabl