Magnetic behavior, Griffiths phase and magneto-transport study in 3d based nano-crystalline double perovskite Pr2CoMnO6

Publication date: Available online 24 April 2019Source: Physics Letters AAuthor(s): Ilyas Noor Bhatti, Imtiaz Noor Bhatti, Rabindra Nath Mahato, M.A.H. AhsanAbstractDouble perovskite (DP) oxide material receive extensive research interest due to exciting physical properties with potential technological application. 3d based DP oxides are promising for exciting physics like magnetodielectric, ferroelectric, Griffiths phase, etc., specially Co/Mn DPs are gaining much research interest. In this paper we present the study of magnetic phase and transport properties in nano-crystalline Pr2CoMnO6 a 3d based double perovskite compound. This material shows a paramagnetic (PM) to ferromagnetic (FM) phase transition below 173 K marked by a rapid increase in magnetic moment due to spin ordering. We found divergence in inverse magnetic susceptibility (χ−1) from Curie–Weiss behavior around 206 K which indicates the evolution of Griffiths phase before actual PM-FM transition. We found that the Griffiths phase suppressed with increasing applied magnetic field. For the understanding of charge transport in this material we have measured temperature dependent electrical resistivity. Pr2CoMnO6 is a strong insulator where resistivity increase abruptly below magnetic phase transition. To understand the effect of magnetic field on transport behavior we have also measured the magnetoresistance (MR) at different temperatures. Sample shows the negative MR with maximum value ∼22% un...
Source: Physics Letters A - Category: Physics Source Type: research

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Publication date: Available online 21 January 2020Source: The Lancet PsychiatryAuthor(s): Chido Rwafa-Madzvamutse, Khameer Kidia, Oye Gureje, Walter Mangezi, Helen E Jack
Source: The Lancet Psychiatry - Category: Psychiatry Source Type: research
Publication date: Available online 21 January 2020Source: The Lancet PsychiatryAuthor(s): S P Sashidharan, Malik Gul
Source: The Lancet Psychiatry - Category: Psychiatry Source Type: research
Publication date: Available online 20 January 2020Source: The Lancet PsychiatryAuthor(s): Sarah Steeg, Pearl L H Mok
Source: The Lancet Psychiatry - Category: Psychiatry Source Type: research
This study aimed to investigate the risk of self-harm following diagnosis of different psychiatric disorders in an Asian population, through a review of inpatient records retrieved from the Hong Kong Clinical Data Analysis and Reporting System (CDARS).MethodsFor this nested case-control study, the inpatient data of people admitted for any reason to Hong Kong public hospitals, between Jan 1, 2000, and Dec 31, 2010, were extracted from CDARS. Cases were people aged 10 years or older who had been admitted to inpatient care with a first-listed record of psychiatric disorder during the study period. The seven psychiatric disord...
Source: The Lancet Psychiatry - Category: Psychiatry Source Type: research
We examined whether mental contamination, relative to established OCD belief domains, mediated the relationship between feared self-perceptions and contact contamination. In our sample of 626 undergraduate participants, feared self-perceptions significantly predicted contact contamination symptoms, with mental contamination and two OCD belief domains (perfectionism/intolerance of uncertainty, importance of/control over thoughts) as significant mediators. Importantly, mental contamination was the strongest mediator. These findings provide further evidence for the predictive power of vulnerable self-themes in OCD and highlig...
Source: Journal of Obsessive Compulsive and Related Disorders - Category: Psychiatry Source Type: research
In conclusion, the addition of PPIs to the treatment regimen of breast cancer appears to be a promising strategy to potentiate the efficacy of chemotherapy and may suppress cancer metastasis. PMID: 31955147 [PubMed - in process]
Source: Acta Pharmaceutica - Category: Drugs & Pharmacology Authors: Tags: Acta Pharm Source Type: research
Abstract The introduction of the second generation triptans in clinical and experimental practice was a major progress in the pharmacotherapy of migraine. Frovatriptan is a second generation triptan with strong 5-HT1B/1D serotonergic agonism and low 5-HT1A/7 receptor affinity, while almotriptan possesses not only the typical 5-HT1B/1D receptor agonist activity, but shows an affinity to the 5-HT1F receptor. The aim of our study was to assess the impact of frovatriptan and almotriptan on hemodynamics in male and female rats. We used a non-invasive "tail-cuff" method to measure the arterial blood pressure. ...
Source: Acta Pharmaceutica - Category: Drugs & Pharmacology Authors: Tags: Acta Pharm Source Type: research
This study evaluated the antioxidant and antidiabetic properties of a heliangolide sesquiterpene lactone isolated from Helianthus annuus L. leaves. The heliangolide sesquiterpene lactone was isolated through a combination of solvent-solvent partitioning, column chromatography, thin layer chromatography and high-performance liquid chromatography techniques. The antioxidant activity of the compound was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and nitric oxide radical scavenging assays while the antidiabetic effects were investigated in alloxan-induced diabetic rats. The heliangolide derivative at the concentratio...
Source: Acta Pharmaceutica - Category: Drugs & Pharmacology Authors: Tags: Acta Pharm Source Type: research
Abstract A series of nine new 2,3-disubstituted 4(3H)-quinazolin-4-one derivatives was furnished starting from the 2-propyl-4(3H)-quinazo-line-4-one (2). The reinvestigation of the key starting quinazolinone 2 was performed under microwave irradiation (MW) and solvent-free conditions. Combination of MW and phase-transfer catalysis using tetrabutylammonium benzoate (TBAB) as a novel neutral ionic catalyst was used for carrying out N-alkylation and condensation reactions of compound 2 as a simple, efficient and eco-friendly technique. The structure of the synthesized compounds was elucidated using different spectral...
Source: Acta Pharmaceutica - Category: Drugs & Pharmacology Authors: Tags: Acta Pharm Source Type: research
Abstract Two-step targeted 2D planar chromatographic method (2DTLC) was used in the determination of ginkgolic acids in pharmaceuticals and dietary supplements. The choice of the extraction method and the separation technique was guided by the formulation type (capsule, tablet, tincture) with expected low amounts of ginkgolic acids in the analyzed herbal samples. Separation of ginkgolic acids C15:1 and C17:1 on HPTLC RP18 WF254s was preceded by its separation from the sample matrix on TLC Si60 F254s. Mobile phases consisted of acetonitrile/water/formic acid (80:20:1, V/V/V) and n-heptane/ethyl acetate/formic acid ...
Source: Acta Pharmaceutica - Category: Drugs & Pharmacology Authors: Tags: Acta Pharm Source Type: research
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