605 research outputs found

    Effect Of Fenugreek And Curry Leaves Powder On Dyslipidemia- A Randomized Controlled Pilot Study

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    Background: Dyslipidemias, a disorder of lipid metabolism, is widely established as an independent major and modifiable risk factor of cardiovascular disease (CVD). The conditions are common worldwide and a leading cause of death in India, and has even riven the age bar swaying in young people too. The significant effect of an increase in dyslipidemias depends on diabetes and hypertension. Nutraceuticals, derived from food sources serve as an alternative therapy for the management of dyslipidemia. India is home to multitudinous medicinal plants, of which many remain underutilized. Murraya Koenigii (curry leaf) and Trigonella foenum-graecum (fenugreek leaves) are well-proven as good sources of nutraceutical and functional foods. Objectives: To study the effect of fenugreek and curry leaves powder on dyslipidemia and also the dietary habits of dyslipidemic subjects. Materials and Methods: 31 subjects aged between 40-70 years were recruited based on inclusion and exclusion criteria, and grouped into group 1(hypertensive with dyslipidemia), group 2 (diabetic with dyslipidemia), and group 3 (only dyslipidemia) supplemented with the mixture of fenugreek and curry leaf powder for 3 months. Results: Reduction in total cholesterol and triglyceride levels were observed in group 2 (DM+DLP) and group 1 (HTN+DLP) i.e 221.2±29 and 193±72.4 respectively. The HDL levels increased in all three groups. Reduced VLDL and FBS levels were observed in all three groups. Conclusion: Our findings showed that fenugreek and curry leaf powder supplementation, as a phenolic-rich herb can be effective in the reduction of some lipid profiles in dyslipidemic patients suggesting their potential neutraceutical role in treating CVD

    Value relevance of financial information: A comparative study of pre- and post- implementation of Indian accounting standards

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    In 2016, India implemented new accounting standards, Ind AS, aligning with IFRS to increase transparency in the financial reporting of Indian companies. This study examines the value relevance of financial information in India before and after the adoption of Indian accounting standards (Ind AS) by comparing the published financial statements in pre- and post-Ind AS periods and determines the influence of financial information on the market price of shares. The study period is for twelve years, from 2011 to 2022, divided into 2011–2016 (pre-Ind AS period) and 2017–2022 (post-Ind AS period). To evaluate the value relevance of financial information, the Ohlson pricing model is employed on the panel data of the blue-chip companies listed in the Nifty 50 Index. The results from the Least Squares regression reveal that the net cash from investing activities, profit-after-tax, and book-value-per-share were relevant for investment decisions prior to the adoption of the Ind AS. In contrast, the profit-after-tax had no explanatory power during the post-Ind AS period. However, the net cash from investing activities and the book-value-per-share significantly influenced the market price of equity since the implementation of Ind AS. The value relevance of the accounting statements was superior in the pre-Ind AS period compared to the post-Ind AS

    Studies on metal-organic frameworks of Cu(II) with isophthalate linkers for hydrogen storage

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    Hydrogen (H2) is a promising alternative energy carrier due to its environmental benefits, high energy density and its abundance. However, development of a practical storage system to enable the “Hydrogen Economy” remains a huge challenge. Metal-organic frameworks (MOFs) are an important class of crystalline coordination polymers constructed by bridging metal centers with organic linkers, and show promise for H2 storage due to their high surface area and tuneable properties. We summarize our research on novel porous materials with enhanced H2 storage properties, and describe frameworks derived from 3,5-substituted dicarboxylates (isophthalates) that serve as versatile molecular building blocks for the construction of a range of interesting coordination polymers with Cu(II) ions. A series of materials has been synthesised by connecting linear tetracarboxylate linkers to {Cu(II)2} paddlewheel moieties. These (4,4)-connected frameworks adopt the fof-topology in which the KagomĂ© lattice layers formed by {Cu(II)2} paddlewheels and isophthalates are pillared by the bridging ligands. These materials exhibit high structural stability and permanent porosity, and the pore size, geometry and functionality can be modulated by variation of the organic linker to control the overall H2 adsorption properties. NOTT-103 shows the highest H2 storage capacity of 77.8 mg g−1 at 77 K, 60 bar among the fof-type frameworks. H2 adsorption at low, medium and high pressures correlates with the isosteric heat of adsorption, surface area and pore volume, respectively. Tri-branched C3-symmetric hexacarboxylate ligands with Cu(II) give highly porous (3,24)-connected frameworks incorporating {Cu(II)2} paddlewheels. These ubt-type frameworks comprise three types of polyhedral cage: a cuboctahedron, truncated tetrahedron and a truncated octahedron which are fused in the solid state in the ratio 1:2:1, respectively. Increasing the length of the hexacarboxylate struts directly tunes the porosity of the resultant material from micro- to mesoporosity. These materials show exceptionally high H2 uptakes owing to their high surface area and pore volume. NOTT-112, the first reported member of this family reported, adsorbs 111 mg g−1 of H2 at 77 K , 77 bar. More recently, enhanced H2 adsorption in these ubt-type frameworks has been achieved using combinations of polyphenyl groups linked by alkynes to give an overall gravimetric gas capacity for NU-100 of 164 mg g−1 at 77 K, 70 bar. However, due to its very low density NU-100 shows a lower volumetric capacity of 45.7 g L-1 compared with 55.9 g L-1 for NOTT-112, which adsorbs 2.3 wt% H2 at 1 bar, 77K. This significant adsorption of H2 at low pressures is attributed to the arrangement of the {Cu24(isophthalate)24} cuboctahedral cages within the polyhedral structure. Free metal coordination positions are the first binding sites for D2, and in these ubt-type frameworks there are two types of Cu(II) centres, one with its vacant site pointing into the cuboctahedral cage and another pointing externally. D2 molecules bind first at the former position, and then at the external open metal sites. However, other adsorption sites between the cusp of three phenyl groups and a Type I pore window in the framework are also occupied. Ligand and complex design feature strongly in enhancing and maximising H2 storage, and, although current materials operate at 77 K, research continues to explore routes to high capacity H2 storage materials that can function at higher temperatures

    Effect of synthesis conditions on formation pathways of metal organic framework (MOF-5) Crystals

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    Metal Organic Frameworks (MOFs) represent a class of nanoporous crystalline materials with far reaching potential in gas storage, catalysis, and medical devices. We investigated the effects of synthesis process parameters on production of MOF-5 from terephthalic acid and zinc nitrate in diethylformamide. Under favorable synthesis conditions, we systematically mapped a solid formation diagram in terms of time and temperature for both stirred and unstirred conditions. The synthesis of MOF-5 has been previously reported as a straightforward reaction progressing from precursor compounds in solution directly to the final MOF-5 solid phase product. However, we show that the solid phase formation process is far more complex, invariably transferring through metastable intermediate crystalline phases before the final MOF-5 phase is reached, providing new insights into the formation pathways of MOFs. We also identify process parameters suitable for scale-up and continuous manufacturing of high purity MOF-5

    Observation of reduced thermal conductivity in a metal-organic framework due to the presence of adsorbates

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    Whether the presence of adsorbates increases or decreases thermal conductivity in metal-organic frameworks (MOFs) has been an open question. Here we report observations of thermal transport in the metal-organic framework HKUST-1 in the presence of various liquid adsorbates: water, methanol, and ethanol. Experimental thermoreflectance measurements were performed on single crystals and thin films, and theoretical predictions were made using molecular dynamics simulations. We find that the thermal conductivity of HKUST-1 decreases by 40 – 80% depending on the adsorbate, a result that cannot be explained by effective medium approximations. Our findings demonstrate that adsorbates introduce additional phonon scattering in HKUST-1, which particularly shortens the lifetimes of low-frequency phonon modes. As a result, the system thermal conductivity is lowered to a greater extent than the increase expected by the creation of additional heat transfer channels. Finally, we show that thermal diffusivity is even more greatly reduced than thermal conductivity by adsorption
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