320 research outputs found
Ru(II)-functionalized SBA-15 as highly chemoselective, acid free and sustainable heterogeneous catalyst for acetalization of aldehydes and ketones
No full textCombining electron deficient Ru(II) coordination sites with organofunctionalized SBA-15, (L)Ru(II)@SBA-15, result in a mild, neutral, water scavenger free and chemo-selective acetalization catalyst for cyclic/acyclic acetals. Vacant coordination sites of ruthenium in (L)Ru(II)@SBA-15 activates protecting groups as well as reactants simultaneously and restricts the reverse acetalization reaction. Synthesized (L)Ru(II)@SBA-15 catalyst has been thoroughly characterized and act as competitive catalyst compared to conventional acid catalysts. (L)Ru(II)@SBA-15 performs high catalytic activity as well as selectivity within 20 min with high TOF. The catalyst can be recycled and reaction parameters are optimized
Phenylacetylene hydrogenation on Au@Ni bimetallic core–shell nanoparticles synthesized under mild conditions
No full textThe synthesis of Au@Ni bimetallic core–shell nanoparticles through an energy efficient (lower temperature) route in oleylamine following a sequential reduction strategy is reported. The method is found to be useful for the synthesis of a very thin nickel shell (2 nm) over a gold core (15 nm). Synergistic effects are observed in catalyzing phenylacetylene hydrogenation under different solvent conditions
Distributions of water in pores of periodic mesoporous organosilicates – a proton solid state MAS NMR study
No full textSolid state proton (1H) magic angle spinning (MAS) NMR has been employed to study the distribution of confined water in ethane substituted periodic mesoporous organosilicate (PMOE) materials. Proton spectra acquired at different hydration levels are analysed and interpreted in terms of water clusters of various sizes and distributions of water layers on the pore surface. For comparison, we also performed similar experiments on SBA-15. The formation of larger clusters at lower hydration suggests that the pores of PMOE are getting filled with water at lower hydration levels than those in SBA-15. For PMOE, the simultaneous presence of two major resonances in the ranges 3.6–4.1 ppm and 4.4–5.2 ppm and their behaviour upon hydration imply a water layer distribution that is the sum of two contributions, corresponding to fully filled and partially filled pores or pore segments. Furthermore, the behaviour mentioned above suggests that both radial and axial filling mechanisms play a significant role in the hydration process. For SBA-15, as a function of hydration, we observed a smooth variation in the proton chemical shift of the main dynamic resonance. In accordance with previous studies, this is attributed to the gradual increase in the average thickness of water layers with an increase in hydration, and to a pore filling mechanism that is predominantly radial
Ek duniyā alag sī Narrative strategies and Adivasi representation in the short stories of Vinod Kumar
No full textThis paper investigates the narrative strategies of representation used by the Indian author Vinod Kumar in his literary writing about the life and spaces of the Adivasi. The focal point of this study consists in the fact that the author is a non-Adivasi, thus placing him and his writing in the center of a very much debated issue of Hindi literature i.e. the polarity between the writing through sympathy (Hindi sahānubhūti) and the writing through personal experience (anubhūti). This study-case looks at how the author, being a dikū, an outsider describes the ‘other’ (i.e. the Adivasi). The results show that the author’s representation of the Adivasi, based on a solid empirical knowledge of his ‘other’, contains some elements of romanticism revealing both his outsideness and a strong empathy for the ‘other’.Masteruppsats i indologi 2019</p
Discrete implementation of cancer from the NCD program and concurrent opportunities for research
No full textArticle Type: Editorial
Title: Discrete implementation of cancer from the NCD program and concurrent opportunities for research
Year: 2022; Volume: 2; Issue: 2; Page No: 1 – 3
Author: Vinod K Ramani1*, Radheshyam Naik2
https://doi.org/10.55349/ijmsnr.20222213
Affiliation: 1Senior Consultant, Medical Affairs, Technology Healthcare Big data Analytics, Gurugram, India. Email ID: [email protected]
2Group Medical Advisor, Medical Oncology, Healthcare Global Enterprise Ltd., Bangalore. Email ID: [email protected]
Article Summary: Submitted : 03-April-2022; Revised: 28-May-2022; Accepted: 15-June-2022; Published: 30-June-2022Editorial Articl
Highly selective aqueous phase selective hydrogenation of phenols over RuO2 nanoparticles supported on MCM-41
No full textSelective aqueous phase hydrogenation of phenol as well as its derivatives is important for the synthesis of chemical intermediates which are crucial for the manufacture of high-tonnage commodities and a multitude of value added platform chemicals. Herein, we report a facile catalyst made of highly dispersed small RuO2 nanoparticles supported on mesoporous MCM-41 using one-pot approach. The optimal 5RuO2-MCM-41 catalyst with particle size 6-8 nm showed excellent activity and selectivity in aqueous phase hydrogenation of phenol and other functionalized substrates, which are building blocks of lignin, to corresponding cyclohexanol products without any additives. These catalysts showed better stability and can be reused several times without any significant drop in activity which proves the heterogeneity of the immobilized oxide catalyst
On asset pricing and the equity premium puzzle
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Presented here are consumption and production related asset pricing models which seek to explain stock market behaviour through the stock premium over risk-free bonds and to do so using parameter values consistent with theory. Our results show that there are models capable of explaining stock market behaviour.
For the consumption-based model, we avoid many of the suggestions to artificially boost the predicted stock premium such as modelling consumption as leverage claims; instead we use the notion of surplus consumption. We find that with surplus consumption, there are models including the much-maligned power utility model, capable of yielding theory consistent estimates for the discount rate, risk-free rate as well as the coefficient of relative risk aversion, y.
Since real business cycle theory assumes a risk aversion coefficient of 1, we conclude that our model which gives a value close to but not equal to 1, provides an indication of the impact of market imperfections.
For production, we present many of the existing models which seek to explain stock market behaviour using production data which we find to be generally incapable of explaining stock market behaviour. We conclude by presenting a profit based formulation which uses deviations of actual from expected profits and dividends via stock price reaction parameters to successfully explain stock market behaviour. We also conclude that the use of a profit based formulation allows for a link to investment, output and pricing decisions and hence link consumption and production.Thames Valley Universit
A heterogeneous route for transfer hydrogenation reactions of ketones using Ru(II) Cymene complex over modiifed benzene-organosilica (PMOB)
No full textAn inorganic-organic hybrid catalyst, Ru(II)Cym@PMOB, was synthesized by anchoring of [Ru(II)Cl2(p-cymene)]2 complex which is derived from a reaction between hydrated ruthenium(III) trichloride and α-phellandrene over aminofunctionalized benzene-organosilica (PMOB). In the context of secondary alcohol synthesis from ketones, transfer hydrogenation (TH) reactions are convenient compared to conventional hydrogenation reactions owing to its lower activation energy and ambient pressure and mild temperature reaction conditions. The synthesized catalysts were characterized by CHN analysis, XRD, ICP, N2-sorption analysis, TG & DTA, FTIR, 13C & 29Si solid NMR, UV–vis, TEM, SEM and XPS. The catalytic activities of neat [Ru(II)Cl2(p-cymene)]2 complex and Ru(II)Cym@PMOB were evaluated in transfer hydrogenation (TH) of ketones (∼97%) and compared with conventional hydrogenation reactions (∼5%) where molecular H2 was used. The results showed Ru(II)Cym@PMOB as highly active catalyst towards transfer hydrogenation (TH) reaction of acetophenones compared to neat [Ru(II)Cl2(p-cymene)]2 complex. The heterogeneity of Ru(II)Cym@PMOB was confirmed by Sheldon’s test
Issues in adjustment lending
No full textReaping the full benefit of adjustment packages depends on a government's commitment to reform as well as a variety of complementary factors, many of which have not been duly considered because of the lack of time, resources, and skills. It is becoming increasingly clear that if these packages are to be more effective and credible, the menu of policy options might be expanded in three areas. One is translating adjustment policies into improved economic performance -- the objective of domestic strategy. The second is reconciling policy reforms with changing external strategy. The third is improving the process of adjustment itself. The report concludes that attention needs to be placed on the commitment to price reforms and nonprice areas. Support might increase for the outward orientation of countries -- if discussions are extended to consider external factors and if nondistortionary ways of promoting domestic production are explored. There must also be greater government commitment to building support for the reforms as well as flexiblity in the external financing community.Environmental Economics&Policies,Economic Theory&Research,Country Strategy&Performance,Achieving Shared Growth,ICT Policy and Strategies
Eliciting Requirements of a Knowledge Management System for Gaming in an Organization: The Role of Tacit Knowledge
No full textGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Policy AnalysisOrganisation & Governanc
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