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Electroreduction of Tungsten Oxide（VI） in Molten Salts with Added Metaphosphate

Chemical Research in Chinese Universities 2013年第4期29卷 771-775页

作者： MALYSHEV Victor GAB Angelina POPESCU Ana-maria COnSTAnT1n Virgil Faculty of Chemistry & Technology National Technical University of Ukraine "Kyiv Polytechnical Institute " Kyiv 05056 Ukraine" Open International University of Human Development of Ukraine Kyiv 04071 Ukraine Laboratory of Molten Salts Ilie Murgulescu" Institute of Physical Chemistry of the Romanian Academy Bucharest 006021 Roumania

Tungstate ions WO4^2- are not electrochemically active in chloride melts. Upon introduction of PO3 ions into the melt, two waves appear in the voltammograms at potentials -0.1-- -0.2 V and -0.3-- -0.5 V vs. Pb/Pb2＋ reference electrode. With a PO3- concentration ratio of 0.01〈[PO3-]/[WO42-]〈0.18, the potentiostatic electrolysis product of WO42 at the above mentioned potentials is metallic tungsten; a naPO3 concentration increase for ratios [PO3-]/[WO42-]〉〉0.18 results in tungsten phosphide in electrolysis product. Cyclic voltammograms and dependence of half-peak potentials on electrode polarization rate indicate the irreversible character of the electrode process. Elec- trode process modeling allows us to state that the first wave in the voltammogram of KC1-naC1-na2WOa-naPO3 sys- tem corresponds to tungsten oxychlorides discharge while the second wave appears due to the discharge of di- tungstate ions. In the voltammograms of na2WOa-naPO3 melts, reduction wave was observed at -1.1-- -1.2 V po- tentials. Proportionality of limiting current to naPO3 concentration, constancy of ld/V1/2 ratio, and IJnFc constant ki- netic value equal to （8.3--9.5）×10-5 cm/s for steady-state wave indicate that electrode process rate is limited by elec- trochemically active particle diffusion to the electrode. nascent ditungstate ions become electrochemically active in the overall electrode process. Charge transfer stage is reversible.

关键词： Tungsten oxide Electroreduction Molten salt Cyclic voltammetry

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Development of waste-to-energy through integrated sustainable waste management:the case of ABREn WtERT Brazil towards changing status quo in Brazil

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Waste Disposal and Sustainable Energy 2023年第3期5卷 295-308页

作者： Yuri Schmitke Almeida belchior Tisi Flavio Arantes Matos maria Luisa n.M.Carneiro Waste to Energy Research and Technology Council—WtERT Brasil Distrito FederalBrasília71316-109Brazil Waste to Energy Research and Technology Council—WtERT Brasil Ribeirão PretoSão PauloBrazil Waste to Energy Research and Technology Council—WtERT Brasil Rio de JaneiroBrazil

In the context of circular economy,it is known that once waste is generated,it should be subject to proper treatment for recovering material or energy before being *** countries worldwide,especially developing countries such as Brazil,have been struggling to effectively apply sustainable waste management in municipalities and still rely on dumpsites and unsuitable ***,a weak legal framework,lack of financial resources and poor infra-structure as well as pressure from organizations profiting from the expansion of landfills are some factors contributing to the preservation of the negative status quo:the“landfill culture”.Material recovery,i.e.,recycling and composting,is applied to less than 5%of Brazilian municipal waste,while 95%is disposed of in landfills or *** this context,ABREn WtERT(Waste-to-Energy Research and Technology Council)Brazil was created in 2019 as the first permanent organization formed to promote the development of energy and material recovery from waste focused on the waste-to-energy(WTE)*** this paper,the strategy proposed and implemented by the organization towards changing the status quo in Brazil through an integrated sustainable waste management approach is *** proposed strategy integrates the concepts of Sustainability and Circular Economy for minimizing landfill disposal(avoiding methane emissions)and maximizing material/energy *** others,the approach focuses on changing the public opinion regarding thermal treatment facilities,mainly incinerators,which has been wrongly linked to pollution,excessive public expenditures and considered a harm to the recycling *** activities performed by ABREn include engaging public and private institutions,enhancing education,leading the publication of research and business studies,gathering industry members and academy experts,as well as creating strategic alliances with players around the *** a result,within a few years,major

关键词： Integrated Sustainable Waste Management(ISWM) Waste-to-energy(WTE) Municipal solid waste(MSW) Energy recovery

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Unveiling the nature of Polar-ring Galaxies from Deep Imaging

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Research in Astronomy and Astrophysics 2022年第11期22卷 34-50页

作者： Aleksandr V.Mosenkov Vladimir P.Reshetnikov maria n.Skryabina Zacory Shakespear Department of Physics and Astronomy N283 ESCBrigham Young UniversityProvoUT 84602USA Central(Pulkovo)Astronomical Observatory Russian Academy of SciencesPulkovskoye Chaussee 65/1196140 St.PetersburgRussia St.Petersburg State University 7/9 Universitetskaya Nab.199034 St.PetersburgRussia

General structural properties and low surface brightness tidal features hold important clues to the formation of *** this paper,we study a sample of polar-ring galaxies(PRGs)based on optical imaging from the Sloan Digital Sky Survey Stripe 82 and other deep *** investigate the deepest images of candidates for PRGs to *** carry out photometric decomposition on the host galaxies and associated polar structures that allows us to derive the structural properties of both *** are able to detect very faint tidal structures around most PRGs in our *** several galaxies,we can directly observe the formation of the polar ring due to merging,which is manifested in debris of the victim galaxy and an arc-like polar structure made up of its *** a few cases,we can discern signs of tidal *** results obtained indicate that the gravitational interaction and merging of galaxies are the most plausible mechanisms for the formation of PRGs.

关键词： data analysis techniques:photometric galaxies:structure

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A sensitive electrochemical detection of metronidazole in synthetic serum and urine samples using low-cost screen-printed electrodes modified with reduced graphene oxide and C60

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Journal of Pharmaceutical Analysis 2021年第5期11卷 646-652页

作者： Elsa maria Materon Ademar Wong Tayane Aguiar Freitas Ronaldo Censi Faria Osvaldo n.Oliveira Jr. Department of Chemistry Federal University of Sao Carlos13560-970Sao CarlosBrazil Sao Carlos Institute of Physics University of Sao Paulo13560-970Sao CarlosBrazil

Monitoring the concentration of antibiotics in body fluids is essential to optimizing the therapy and minimizing the risk of bacteria resistance,which can be made with electrochemical sensors tailored with appropriate *** this paper,we report on sensors made with screen-printed electrodes(SPE)coated with fullerene(C60),reduced graphene oxide(rGO)and nafion(nF)(C60-rGO-nF/SPE)to determine the antibiotic metronidazole(MTZ).Under optimized conditions,the C60-rGO-nF/SPE sensor exhibited a linear response in square wave voltammetry for MTZ concentrations from 2.5×10^(-7) to 34×10^(-6) mol/L,with a detection limit of 2.1×10^(-7) mol/*** sensor was also capable of detecting MTZ in serum and urine,with recovery between 94%and 100%,which are similar to those of the standard chromatographic method(HPLC-UV).Because the C60-rGO-nF/SPE sensor is amenable to mass production and allows for MTZ determination with simple principles of detection,it fulfills the requirements of therapeutic drug monitoring programs.

关键词： Metronidazole Fullerene Reduced graphene oxide Screen-printed electrodes Antibiotic

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Selective biomass conversion over novel designed tandem catalyst

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Journal of Bioresources and Bioproducts 2024年第4期9卷 508-517页

作者： Fatima-Zahra Azar Achraf El Kasmi mariaÁngeles Lillo-Ródenas maria del Carmen Román-Martínez Haichao Liu Department of Inorganic Chemistry and Materials Institute Faculty of SciencesUniversity of Alicante.Alicante E-03080Spain Sustainable Materials Research Center University of Mohammed Ⅵ PolytechnicBenguerir 43150Morocco Laboratory LSIA ENSAHAbdelmalek Essaadi UniversityTetouan 93030Morocco College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Selective conversion of biomass into targeted molecules like polyols, especially, from cellulosic compounds, is being widely investigated as a sustainable process to produce biodiesel and bio- additives. The known process involves two steps, namely hydrolysis and hydrogenation. Thus, it requires two different catalytic materials or bifunctional catalysts. In this context, the present work reports a new catalytic approach based on the use of tandem catalysts, consisting of the combination of an acid solid catalyst (active for hydrolysis) and a supported metal catalyst (active for hydrogenation). Two different functionalized activated carbons and the resin Amberlyst 15 have been tested as solid acid catalysts, and Ru nanoparticles supported on the original activated carbon (SA) are the metal catalyst part of the tandem. All the tested tandem catalysts exhibited higher activity than the supported Ru catalyst did. The highest cellulose conversion and selectivity to sorbitol (70% and 86%, respectively) have been obtained over a novel tandem catalyst, which resulted from a physical mixture between a sulfuric acid modified SA carbon (SASu) and Ru loaded SA (Ru/SA), leading to a tandem catalyst (Ru/SA + SASu). This novel-designed tandem catalyst is reusable. Based on tandem catalysts with a solid-solid system combination, the adopted novel- designed catalytic approach is cost-efficient and sustainable, and can be considered promising for the green production of high-added-value chemicals.

关键词： Biomass Tandem catalysts Carbon materials One-pot conversion Sustainability

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Physics, chemistry, and Hirshfeld surface analyses of gamma-irradiated thalidomide to evaluate behavior under sterilization doses

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Journal of Pharmaceutical Analysis 2018年第3期8卷 194-201页

作者： Valner A.F.S.n.Mussel Max R Ferreira maria B.E Marques maria I.Yoshida mariana R.Almeida Bernardo L.Rodrigues Wagner n.Mussel Departamento de Quimica ICExUniversidade Federal de Minas Gerais-UFMGAv.Antonio Carlos 662731270-901 Belo HorizonteMGBrazil CnEn-CDTn Comissao Nacional de Energia Nuclear-Centro de Desenvolvimento da Tecnologia NuclearAv.Antonio Carlos6627 Belo HorizonteMGBrazil

Thalidomide was indicated as a sedative and antiemetic and prescribed for pregnant women. Its tragic teratogenic effects culminated in withdrawal from the market. Since the discovery of its anti-angiogenic and anti-inflammatory actions, thalidomide has been used in the treatment of leprosy and multiple myeloma, which justify studies of its stability. We investigated the effects of irradiation of thalidomide up to 100 kGy （fourfold the usual sterilizing dose for pharmaceutics）. The polymorph of thalidomide was obtained in an isothermal experiment at 270℃. All samples underwent gamma irradiation for specific times. At different doses, decomposition of the pharmaceutical was not observed up to 100 kGy. The observed effect was angle turning between the phthalimide and glutarimide rings modulated by repulsion towards the carbonyl group, leading to a stable energetic configuration, as measured by the equilibrium in the torsion angle after irradiation. The thalidomide molecule has a center of symmetry, so a full turn starting from 57.3° will lead to an identical molecule. Further irradiation will start the process again. Samples irradiated at 30 and 100 kGy have more compact unit cells and a lower volume, which leads to an increase in the intermolecular hydrogen interaction within the unit cell, resulting in higher thermal stability for polymorph α.

关键词： Thalidomide Thermal stability Polymorphs Gamma irradiation Hirshfeld

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Optimized Image Multiplication with Approximate Counter Based Compressor

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Computers, Materials & Continua 2022年第8期72卷 3815-3834页

作者： M.maria Dominic Savio T.Deepa1,n.Bharathiraja Anudeep Bonasu SRMIST Chennai603203India Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering College Chennai601206India Intel Corportation California93657USA

The processor is greatly hampered by the large dataset of picture or multimedia *** logic of approximation hardware is moving in the direction of multimedia processing with a given amount of acceptable *** study proposes various higher-order approximate counter-based compressor(CBC)using input shuffled 6:3 *** the Wallace multiplier using a CBC is a significant factor in partial product *** the design of 10-4,11-4,12-4,13-4 and 14-4 CBC are proposed in this paper using an input shuffled 6:3 compressor to attain two stage *** input shuffling aims to reduce the output combination of the 6:3 compressor from 64 to *** of 15-4,10-4,9-4,and 7-3 CBCs are performed using the proposed 6:3 compressor and the results obtained are compared with the existing *** existing models are constructed using multiplexers and 5-3 *** compared to input shuffled 5-3 the proposed 6:3 compressor shows better results in terms of area,power and *** approximation is performed on the 6:3 compressor to further reduce the computational energy of the system which is optimal for multimedia *** major contribution of this work is the development of two stage multiplier using various proposed *** designs of the approximate compressor(AC)and true compressor(TC)are analysed with 8 ×8 and 16 × 16 *** proposed multipliers also provide adequate levels of accuracy,according to the MATLAB simulations,in addition to greater hardware *** the result approximate circuits over image processing shows the stunning performance in many deep learning network in the current research which is only oriented to multimedia.

关键词： Multiplier PSnR image processing approximate compressor nED

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Individualization of chronic hepatitis C treatment according to the host characteristics

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World Journal of Gastroenterology 2014年第11期20卷 2839-2853页

作者： nikolaos K Gatselis Kalliopi Zachou Asterios Saitis maria Samara George n Dalekos Department of Medicine and Research Laboratory of Internal Medicine School of MedicineUniversity of Thessaly41110 LarissaGreece Department of Pathology School of MedicineUniversity of Thessaly41110 LarissaGreece

Hepatitis C virus(HCV)infection is a global health problem that affects more than 170 million people *** is a major cause of cirrhosis and hepatocellular carcinoma,making the virus the most common cause of liver failure and *** standardof-care treatment for chronic hepatitis C(CHC)has been changed during the last decade and direct acting antiviral drugs have already been ***,understanding of the pathogenesis of CHC has evolved rapidly during the last years and now several host factors are known to affect the natural history and response to *** genome-wide association studies have shown the important role of interleukin-28B and inosine triphosphatase in HCV *** present review article attempts to summarize the current knowledge on the role of host factors towards individualization of HCV treatment.

关键词： Chronic hepatitis C Hepatitis C virus host factors Interleukin 28B Inosine triphosphatase Single nucleotide polymorphism

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Difficulty scores in laparoscopic liver surgery—getting closer to a powerful and necessary tool

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Hepatobiliary Surgery and nutrition 2019年第4期8卷 428-430页

作者： Ruben Ciria maria Dolores Ayllon Javier Brice(n)o Unit of Hepatobiliary Surgery and Liver Transplantation University Hospital Reina Sofia Cordoba Spain

Obtaining standardized difficulty scores for surgical techniques is mandatory. The more accurate the scores become, the better results may be achieved in terms of patients' safety and surgical implementation. This need is especially useful when technically demanding and complex surgical procedures are performed. In this sense, liver resections are difficult procedures with high morbidity and mortality rates that should be performed by experienced surgeons. Hepatobiliary surgery has always been considered as a long-term project that needs patience, expertise and a progressive learning curve. Since the first reported laparoscopic liver resection in 1996, the adoption and implementation of minimally invasive liver surgery has been cautious. However, laparoscopic liver resections have experienced a wide expansion in recent years (1), mainly after the last Consensus Meeting held in Morioka in 2014 (2). One of the statements reported during this Consensus and in the latter European Guidelines Meeting held in Southampton in 2017 (3) is that a need for a safe expansion and control on technical procedures should be encouraged. In this context, liver surgical teams are trying to develop feasible tools that may standardize laparoscopic liver resections.

关键词： surgery closer latter

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Sweet syndrome and differentiation syndrome in a patient with acute promyelocytic leukemia

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World Journal of Clinical Cases 2015年第2期3卷 196-198页

作者： Guillermo Solano-López Mar Llamas-Velasco maria José Concha-Garzón Esteban Daudén Department of Dermatology Hospital Universitario de la Princesa

The differentiation syndrome is an inflammatory reaction with increased capillary permeability that occurs in up to 25% of patients with acute promyelocytic leukemia treated with all-trans retinoic acid. A 50-year-old man with acute promyelocytic leukemia underwent chemotherapy with idarubicin and all-trans retinoic acid. On day +21 the patient developed pruritic prepatelar papules as well as several 10 mm subcutaneous nodules in both thighs accompanied by persistent fever. On the day +25 the patient presented with bilateral pulmonary crackles, infiltrates in the right lower lobe and severe hypotension which required dopamine infusion. Biopsy of one of the thighs nodules was performed. A Sweet syndrome associated to a differentiation syndrome was suspected. All-trans retinoic acid therapy was discontinued and dexamethasone was administered. In 48 h the patient showed remission of the fever and the infiltrates and the skin lesions acquired a residual aspect. It is debatable whether these two syndromes are distinct entities with common mechanisms or whether they are poles of the same spectrum. Dermatologists and hematologists must be aware of these two syndromes and its pathophysiologic association.

关键词： Differentiation syndrome Sweet syndrome Acute promyelocytic leukemia All-trans retinoic acid

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