Synthesis and Antifungal Properties of Some Transition Metal Complexes Involving Potentially Active Heterocyclic Ligands

1 : 1 : 1, M(II)-Npa-TCAjHQ mixed-Iigand complexes [M(II)= = Co(II), Ni(II)), Cu(II) and Zn(II); Npa = N-pyridylanthranilic acid; TCA = thiophene-2-carboxylic acid and HQ = 8-hydroxyquinoline] have been prepared and characterized on the basis of elemental analysis, IR and electronic spectral data, conductivity and magnetic measurements. An octahedral environment around the metal ion has been proposed. ALl the complexes are non-electrolytic in nature. The antifungal activity of the free Iigands and their corresponding metal chelates have been determined on some selected fungi

Synthesis and Antifungal Properties of Some Transition Metal Complexes Involving Potentially Active Heterocyclic Ligands

1 : 1 : 1, M(II)-Npa-TCAjHQ mixed-Iigand complexes [M(II)= = Co(II), Ni(II)), Cu(II) and Zn(II); Npa = N-pyridylanthranilic acid; TCA = thiophene-2-carboxylic acid and HQ = 8-hydroxyquinoline] have been prepared and characterized on the basis of elemental analysis, IR and electronic spectral data, conductivity and magnetic measurements. An octahedral environment around the metal ion has been proposed. ALl the complexes are non-electrolytic in nature. The antifungal activity of the free Iigands and their corresponding metal chelates have been determined on some selected fungi

Studies of some lanthanide quaternary complexes

627-629Formation constants of mixed ligand quaternary lanthanide complexes of the type M-A-B-L'/L" where M = La3+, Pr3+, Nd3+; A=ethylenediamine N, N, N', N' -tetraacetic acid (EDTA); B = thiodiglycolic acid (TDA); L' = iminodiacetic acid (IDA) and L" = glycine(Gly) have been determined by pH-metric technique at 35 ± 1°C in 0.1 mol dm-3 KNO3. Stability constants reveal the orders: La(III) < Pr(III) < Nd(III) in terms of metal ions, binary < ternary < quaternary in terms of complex species, and IDA < Gly in terms of amino acids. The log K values are negative for all the ternary and quaternary systems. However, log K values are significantly positive indicating intramolecular hydrophobic ligand-ligand interactions

Stability constants of some lanthanide mixed ligand complexes

722-725Stability constants of the mixed ligand complexes of some lanthanides, viz., La(III), Pr(III), Nd(III), Gd(III) and Dy(III) with oxydiacetic acid (ODA), tartaric acid (TRA), malic acid (MEA), iminodiacetic acid (IDA) and glycine (GLY) as ligands have been determined pH-metrically at 25 ± 1°C and at an ionic strength of 0.1mol dm-3 (KNO3). A comparison of the values of stability constants of the complexes reveals the order, La(III) K values are negative for all the ternary and quaternary systems; however, DD log K values are significantly positive. These have been explained in terms of intramolecular hydrophobic ligand-ligand interactions. The stability constant data have been used to study the electrostatic factors involved in the formation of these mixed complexes

Study of maternal near miss as an indicator of quality of obstetrics care in tertiary care centre: a prospective study

Background: Maternal near miss is said to have occurred when women presented with life threatening complication during pregnancy, childbirth and within 42 days after delivery, but survive by chance or good institutional care. For identifying near miss cases five factor scoring system was used. In 2009 WHO working group has standardized the criteria for these cases. Methods: The study was a descriptive study done for the period of 18 months between 1st June 2021 to 31st December 2022 conducted in the department of Obstetrics and Gynecology at Bundelkhand Medical College Sagar, Madhya Pradesh, India, which is a tertiary care centre. For each cases of near miss, data were collected on demographic characteristics including gestational age at the time of sustaining the near morbidity, nature of obstetric complications, presence of organ dysfunction/failure, ICU admission and timing of near miss event with respect to admission. Results: A total numbers of 12252 live births were, 28 maternal deaths and 372 MNM cases were reported during the study period. Incidence of MNM was 30.3 %. In present study mortality index is 0.07. Maternal near miss to mortality ratio is 13.2:1. Hypertensive disorder of pregnancy 44.4% were most common cause of MNM followed by severe anemia 23% cases. Conclusions: Critical analysis of MNM cases will help us in identifying the deficiencies in obstetric care. Maternal mortality and morbidity can be reduced if timely and effective care can be given to women experiencing acute pregnancy related complications .There is need for validation of MNM criteria at peripheral level which will enable them in early identification and timely referral of such cases to tertiary centers

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM