Synthesis,Structure and Properties of Ruthenium Polypyridyl Metalloligand Based Metal-Organic Frameworks

Metal-organic frameworks (MOFs) have been extensively studied because of their amazing applications in gas storage, purification, photocatalysis, chemical sensing, and imaging techniques. Ruthenium polypyridyl complexes have been broadly considered as photosensitizers for the conversion of solar energy and photoelectronic materials. With this aspect, we have synthesized three new ruthenium polypyridyl based MOFs ([Ru(H2bpc)Cu(bpc)(Hbpc)2(H2O)]·5H2O (1), [Ru(H2bpc)(Fe(bpc)(Hbpc)2(H2O)2]·6H2O (2) and [Ru(H2bpc)Ni(bpc)(Hbpc)2(H2O)2]·6H2O (3)) from ruthenium(III) chloride, bpc (2,2’- bipyridine-4,4’-dicarboxylic acid) ligand, and 3d M(II) metal ions (M(II)= Cu(II), Fe(II), Ni(II)). These MOFs were synthesized under hydro or solvothermal conditions by using water, ethanol or methanol as solvents. The crystal structures of the new compounds contains zigzag chains of [Ru(bpc)3]n- complex ions linked by Cu, Fe or Ni complex ions individually. Above synthesized crystal structures were characterizing by single-crystal Xray and powder X-ray diffraction strategies, UV-vis and IR spectroscopy. Thermal properties were determining by thermogravimetric analysis. Magnetic properties were also studied

Prevalence of neonatal septicaemia in a tertiary care hospital in Mandya, Karnataka, India

Background: Neonatal sepsis is defined as a clinical syndrome in an infant 28 days of life or younger, manifested by systemic signs of infection and isolation of a bacterial pathogen from the bloodstream. Neonatal sepsis is caused by Gram-positive and Gram-negative bacteria and candida. Microbial invasion of the bloodstream can have serious consequences such as shock, multi-organ failure, disseminated intravascular coagulation (DIC) and death. This study was conducted to know the prevalence of neonatal septicaemia.Methods: This retrospective observational study was conducted in the Department of Microbiology. The data was collected from the records of the Department for a period of one year (January 2014- December 2014).Results: Among 128 blood samples processed from clinically suspected neonatal septicaemic cases, 45 (35.1%) samples showed growth. Among 45 isolates, 22 were from early onset septicaemia (EOS) and 23 were from Late Onset Septicaemia (LOS). Among 45 culture positives, 32 (71.1%) were from males and 13(28.9%) were from females, thus showing a male preponderance. Klebsiella pneumoniae and Candida were the major isolates, 37.8% each. The antibiotic sensitivity showed that most of the Gram negative bacteria were highly resistant to the commonly used antibiotics like Ampicillin and Gentamicin. Gram positive bacteria showed 100% sensitivity to linezolid and Gram negative bacteria showed more than 90% sensitivity to imipenem.Conclusions: Development of sepsis in neonates is a medical emergency and generally the clinicians do not wait for microbiology report and start treatment empirically. If local microbiological databases are available with information regarding the commonly isolated organisms and their drug resistance patterns, it can help the clinicians in empirical therapy.

Father Knows Best: The Interactive Effects of Fathering Quantity and Quality on Child Self-Regulation

In the past decade, developmental research has seen a surge of work regarding fathers and their influences of various aspects of child outcomes- cognitive and socioemotional. Studies show that father involvement, or “quantity” of time the father spends with the child, as well as fathering “quality”, or the characteristics marking the father-child relationship (warmth, supportiveness, sensitivity etc.), can both contribute to variance in the development of individual differences in child outcomes such as language skills, academic success and psychological well-being. One facet of adaptive development, self-regulation (SR), is a robust and consistent predictor of high academic success, fulfilling interpersonal relationships, and overall life satisfaction. SR has been studied extensively in its relation to mother parenting effects. Some work with fathers shows that positive fathering (autonomy-supportiveness, sensitivity, responsiveness, cognitive stimulation) is related to higher levels of SR- both cognitive and emotional. However, no fathering studies to our knowledge have looked at the potential additive or interactive effects of fathering quantity of involvement and quality of caretaking on self-regulatory capacity in children. In this study, I used a sample of fathers and 3-5-year-olds in two urban cities (Springfield, MA and Philadelphia PA, N = 88 dyads) to examine the relationship between father involvement (self-reported “quantity”) and father parenting behaviors (observed and self-reported “quality”) on child self-regulation (cognitive regulation, measured as observed executive function [EF], and emotion regulation, measured as father-reported effortful control [EC]). Results showed that quantity of father involvement and fathering positivity (warm affect, responsiveness, positive control) showed a crossover interaction effect to predict variance in child EF and EC (controlling for family socioeconomic status and child vocabulary skills). Father involvement was positively predictive of higher levels of EF and EC only when the quality of fathering was high in positivity (self-reported). When fathering was low in positivity (self-reported), the relationship between quantity of father involvement and child EF and EC became negative. This work points to the importance of taking a comprehensive view when assessing paternal parenting effects on development and also suggest potential targets for fathering intervention studies

Unsteady 3D MHD Carreau and Casson Fluids over a Stretching Sheet with Non-Uniform Heat Source/Sink

In this study, we analyzed the effects of nonlinear thermal radiation and non-uniform heat source/sink on an unsteady three-dimensional flow of Carreau and Casson fluid past a stretching surface. The transformed governing equations are solved numerically using Runge-Kutta based shooting technique. We obtained better accuracy of the present results by comparing with the already published literature. The influence of dimensionless parameters on velocity and temperature profiles along with the friction factors, local Nusselt and Sherwood numbers are discussed with the help of graphs and tables. We presented dual nature solutions for the flow over a Carreau and Casson fluid cases. It is also found that the non-uniform heat source or sink is control the thermal boundary layer for both the Casson and Carreau fluid cases. Keywords: MHD, unsteady, nonlinear thermal radiation, Carreau fluid, Casson fluid, 3D

Induced Magnetic Field on Williamson Fluid Past a Stretching Surface with Nonlinear Thermal Radiation and Non-Uniform Heat Source or Sink

In this study, we investigated the effects of induced magnetic field and nonlinear thermal radiation on Williamson nano fluid past a stretching surface in the presence of non-uniform heat source/sink. The transformed governing equations are solved numerically using Runge-Kutta based shooting technique. We acquire better accuracy of the present results by comparing with the published literature. The influence of dimensionless parameters on velocity, temperature and concentration profiles along with the friction factor coefficient, the heat transfer rate and the mass transfer rate are discussed with the help of graphs and tables. It is found that the heat transfer rate in Williamson fluid is high while compared with the Base fluid. Keywords: Induced magnetic field, stretching sheet, nonlinear thermal radiation, non-uniform heat source/sink, Williamson fluid