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Advances in Manufacturing 2019年第2期7卷 155-173页

作者： Kedarnath rane Matteo Strano Department of Mechanical Engineering Politecnico di Milano Via La Masa 1 Milan Italy

The extrusion-based additive manufacturing (EAM) technique is recently being employed for rapid production of metals and ceramic components. This technique involves extruding the metal or ceramic material in solid powder form mixed with a binder (i.e., an expendable viscous fluid), which is removed from the part after 3D printing. These technologies rely on the large design freedom allowed and the cost efficiency advantage over alternative metal additive manufacturing processes that are based on high energy beams, such as laser or electron beams. The EAM of metals and ceramics is not yet widespread, but published scientific and technical literature on it is rapidly growing. However, this literature is still less extensive than that on the fused deposition modeling (FDM) of plastics or the selective laser melting (SLM) of metals. This paper aims at filling this gap. FDM and powder injection molding are identified as preceding or enabling technologies for EAM. This paper systematically reviews all aspects of the feedstock EAM processes used for production of complex-shaped parts. The unique characteristics and advantages of these processes are also discussed with respect to materials and process steps. In addition, the key process parameters are explained to illustrate the suitability of the EAM process for diverse application domains.

关键词： Feedstock extrusion Rapid production Complex-shaped metallic Ceramic parts

Impact of surface roughness,surface charge,and temperature on sandstone wettability alteration by nanoparticles

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Petroleum Science 2023年第5期20卷 2852-2863页

作者： Bingjun Zhang Kaustubh rane Mohammad Piri Lamia Goual Lam Research Corporation 11361 SW Leveton Dr.TualatinOR97062USA Champion X Chemical Technologies 11177 S.Stadium Dr.SugarlandTX77478USA Center of Innovation for Flow through Porous Media Dept.4311University of Wyoming1000 E.University AvenueLaramieWY82071USA Department of Energy and Petroleum Engineering Dept.3295University of Wyoming1000 E.University AvenueLaramieWY82071USA

The wettability of rocks affects the balance between capillary and viscous forces during multiphase flow through porous media,which in turn determines the fluid displacement process governing the recovery of oil from subsurface *** this work,the mechanism of wettability reversal of aged synthetic sandstones by metal oxide nanoparticles(SiO_(2) and Al_(2)O_(3))was investigated with particular focus on the impact of surface roughness,zeta potential,and *** synthetic surfaces were prepared from powders of Berea sandstone with known grain size ranges and their average roughness and roughness ratio were obtained from the 3D surface reconstruction of their microscope *** surface was subsequently aged in Permian crude oil to alter its *** surfaces with larger grain sizes and lower surface roughness ratios,the lower capillary pressure allowed stronger oil/surface interactions,leading to enhanced *** wettability alteration effects of nanoparticles were then examined through real-time top view imaging and dynamic front view contact angle *** negatively charged SiO_(2) nanoparticles rapidly reversed the sandstone wettability,indicating their potential applicability as wettability alteration *** contrast,the positively charged Al_(2)O_(3) counterpart caused no wettability *** mechanism of wettability alteration was further studied by microscale interaction analyses and nanoscale transmission electron *** nanoparticles were only a few nanometers large,the microscale roughness had a negligible effect on the wettability ***,the combined effect of van der Waals dispersion forces and surface-charge-induced electrostatic forces were recognized as the two key factors affecting the wettability of sandstone *** interactions may be curbed at elevated temperatures due to a decrease in the zeta potential and colloidal stability of the particles.

关键词： Wettability Sandstone Surface roughness Nanoparticle Microscope Enhanced oil recovery Contact angle Zeta potential

Systematic lossy error protection based on H.264/AVC redundant slices and flexible macroblock ordering

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 900-909页

作者： BACCICHET Pierpaolo rane Shantanu GIROD Bernd Information Systems Lab Department of Electrical Engineering Stanford University Stanford CA 94305 USA

The authors propose a scheme for Systematic Lossy Error Protection (SLEP) of an H.264/AVC compressed video bit stream, using standard compatible features such as redundant slices, and flexible macroblock ordering. The systematic portion consists of a conventional H.264/AVC bit stream. For error resilience, an additional Wyner-Ziv bit stream is also transmitted. The Wyner-Ziv bit stream allows the decoding of a coarsely quantized description of the original video signal, and is efficiently gen- erated by using H.264/AVC redundant slices in conjunction with Reed-Solomon coding. The Wyner-Ziv bit stream is decoded in order to recover the redundant video descriptions, which are used in lieu of portions lost from the original video signal due to channel errors. SLEP allows the video quality to degrade gracefully with worsening channel conditions, and provides a flexible trade-off between the achieved error resilience and the coarseness of the redundant description. The performance can be improved especially for low motion video sequences, by applying SLEP to a region-of-interest in the video frame, using flexible macroblock ordering (FMO). Experimental results provided for two video transmission scenarios, demonstrate the advantages of SLEP over forward error correction (FEC) as an error resilience scheme.

关键词： Wyner-Ziv coding Distributed video coding Side information Systematic source-channel coding Redundant slices Flexible macroblock ordering (FMO)

LC and LC–MS/MS studies for the identification and characterization of degradation products of acebutolol

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Journal of Pharmaceutical Analysis 2018年第6期8卷 357-365页

作者： Uday Rakibe Ravi Tiwari Anand Mahajan Vipul rane Pravin Wakte Department of Chemical Technology Dr.Babasaheb Ambedkar Marathwada University Department of Pharmaceutical Sciences SVKM's NMIMS Department of Pharmaceutical Analysis Goa College of Pharmacy

The aim of the present investigation was to demonstrate an approach involving use of liquid chromatography(LC) and liquid chromatography-mass spectrometry(LC–MS) to separate, identify and characterize very small quantities of degradation products(DPs) of acebutolol without their isolation from the reaction mixtures. The drug was subjected to oxidative, hydrolytic, thermal and photolytic stress conditions as per International Conference on Harmonization(ICH) guideline Q1 A(R2). Among all the stress conditions the drug was found to be labile in hydrolytic(acidic & basic) and photolytic stress conditions, while it was stable in water-induced hydrolysis, oxidative and thermal stress conditions. A total of four degradation products were formed. A C18 column was employed for the separation of all the DPs on a gradient mode by using high-performance liquid chromatography(HPLC). All the DPs were characterized with the help of their fragmentation pattern and the masses obtained upon LC–MS/MS and MSnanalysis. All the hitherto unknown degradation products were identified as 1-(2-(2-hydroxy-3-(isopropylamino)propoxy)-5-(amino)phenyl)ethanone(DP-I), N-(4-(2-hydroxy-3-(isopropylamino)propoxy)-3-acetylphenyl)acrylamide(DP-II), 1-(2-(2-hydroxy-3-(isopropylamino)propoxy)-5-(hydroxymethylamino)phenyl)ethanone(DP-III) and 1-(6-(2-hydroxy-3-(isopropylamino)propoxy)-2,3-dihydro-2-propylbenzo[d]oxazol-5-yl)ethanone(DP-IV). Finally the in-silico carcinogenicity and hepatotoxicity predictions of the drug and all the DPs were performed by using toxicity prediction softwares viz., TOPKAT, LAZAR and Discovery Studio ADMET. The results of in-silico toxicity studies revealed that acebutolol(0.967) and DP-I(0.986) were found to be carcinogenic, while acebutolol(0.490) and DP-IV(0.437) were found to be hepatotoxic.

关键词： Acebutolol Stress testing LC LC–MS/MS Degradation pathway In-silico toxicity

Gender based violence

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Gynecology and Obstetrics Clinical Medicine 2022年第3期2卷 151-152页

作者： Usama Shahid Ajay rane Urogynaecology Fellow Mater Hospital Pimlico and Townsville University HospitalAustralia Consultant Urogynaecologist Head of Department of Obstetrics and GynaecologyJames Cook UniversityFIGO Committee for Fistula and Genital TraumaAustralia

Gender based violence(GBV)is a preventable and serious human rights violation whereby an individual is harmed based on their gender.1 The violence can be perpetrated physically,sexually,mentally or *** includes domestic violence,rape,feticide/infanticide and female genital *** is to be expected,victims of GBV often suffer from life-long consequences and at times even *** equation of GBV is significantly skewed against women and *** to the sensitive and taboo nature of the topic,exact prevalence numbers of GBV remain difficult to ascertain with a global paucity of data on the matter.2 The World Health Organisation(WHO)estimates that 1 in 3 women will experience sexual or physical violence in their lifetime.1 This article will highlight 2 major forms of GBV in sexual violence and female feticide.

关键词： Gender based violence Rape Infanticide Fetocide

Oxidative coupling of methane over La-promoted CaO catalysts:Influence of precursors and catalyst preparation method

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Journal of Natural Gas Chemistry 2010年第1期19卷 25-30页

作者： Vilas H. rane Sopan T. Chaudhari Vasant R. Choudhary Chemical Engineering and Process Development Division National Chemical LaboratoryPune India

The oxidative coupling of methane to C2 hydrocarbons has been studied over a series of La-promoted CaO （La/Ca = 0.05） catalysts, prepared using different precursor salts for CaO and La2O3 （viz. acetates, carbonates, nitrates and hydroxides） and catalyst preparation methods （viz. physical mixing of precursors, co-precipitation using ammonium carbonate/sodium carbonate as a precipitating agent）, under different reaction conditions （temperature： 700-850 ℃, CH4/O2 ratio： 4.0 and 8.0, and GHSV： 51360 cm^3·g^-1·h^- 1）. The surface area and surface basicity/base strength distribution of the catalysts have also been investigated. The surface properties and catalytic activity/selectivity of the La-promoted CaO catalysts vary from catalyst to catalyst depending on the catalyst precursors used and catalyst preparation method. The basicity/base strength distribution is strongly influenced by the precursors （for CaO and La2O3） and catalyst preparation method. Basicity （total and strong basic sites measured in terms of CO2 chemisorbed at 50℃ and 500 ℃, respectively） observed for the catalyst prepared by co-precipitation method is higher than that of the catalysts prepared by physical mixing method. The catalysts prepared by the nitrates of La- and Ca- and co- precipitated by the solution of sodium carbonate and ammonium carbonate exhibit different catalytic performance in OCM. The finding that no direct relationship between the surface basicity and catalytic activity/selectivity in OCM exists indicates that basicity is not solely responsible for obtaining high selectivity to C2 hydrocarbons.

关键词： oxidative coupling of methane La-promoted CaO catalysts basicity distribution

Influence of alkali metal doping on surface properties and catalytic activity/selectivity of CaO catalysts in oxidative coupling of methane

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Journal of Natural Gas Chemistry 2008年第4期17卷 313-320页

作者： V.H.rane S.T.Chaudhari V.R.Choudhary Chemical Engineering and Process Development Division National Chemical Laboratory

Surface properties （viz. surface area, basicity/base strength distribution, and crystal phases） of alkali metal doped CaO （alkali metal/Ca= 0.1 and 0.4） catalysts and their catalytic activity/selectivity in oxidative coupling of methane （OCM） to higher hydrocarbons at different reaction conditions （viz. temperature, 700 and 750 ℃; CH4/O2 ratio, 4.0 and 8.0 and space velocity, 5140-20550 cm^3 ·g^-1·h^-1） have been investigated. The influence of catalyst calcination temperature on the activity/selectivity has also been investigated. The surface properties （viz. surface area, basicity/base strength distribution） and catalytic activity/selectivity of the alkali metal doped CaO catalysts are strongly influenced by the alkali metal promoter and its concentration in the alkali metal doped CaO catalysts. An addition of alkali metal promoter to CaO results in a large decrease in the surface area but a large increase in the surface basicity （strong basic sites） and the C2＋ selectivity and yield of the catalysts in the OCM process. The activity and selectivity are strongly influenced by the catalyst calcination temperature. No direct relationship between surface basicity and catalytic activity/selectivity has been observed. Among the alkali metal doped CaO catalysts, Na-CaO （Na/Ca = 0.1, before calcination） catalyst （calcined at 750 ℃）, showed best performance （C2＋ selectivity of 68.8% with 24.7% methane conversion）, whereas the poorest performance was shown by the Rb-CaO catalyst in the OCM process.

关键词： oxidative coupling of methane alkali metal doped CaO catalysts basicity/base strength distribution catalytic activity/selectivity

Lentil straw(Lens culinaris): An alternative and nutritious feed resource for kids

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Animal Nutrition 2018年第4期4卷 417-421页

作者： Vishal Mudgal Mukesh K.Mehta Ashok S.rane Department of Animal Nutrition and Feed Technology College of Veterinary Science and Animal Husbandry

The scarcity of feed resources with the continuously increasing cost of usual animal feeds urgently demands searching some alternate feeds for ruminants. In this study, Barberi male kids were divided into4 groups of 5 kids(body weight 17.5 ± 1.8 kg) in each group, and ad libitum fed lentil straw(Lens culinaris;LS), LS based total mixed ration(LSTMR), urea ammoniated LS(ALS) or ALS based total mixed ration(ALSTMR) for a period of 28 days. Results showed LS was a superior feed(CP, 9.2%) for kids, but having quite high crude fibre(CF; 39.6%) and Ca:P ratio(10:1). Urea ammoniation of LS was helpful for increasing the digestible crude protein(DCP)(P < 0.01), nitrogen-free extract(NFE) and total digestible nutrients(TDN) with reduction of CF content. Urea mmoniation also improved the digestibility of neutral and acid detergent fibre(P < 0.01), but its effect on CP digestibility was negative(P < 0.05). Dry matter(DM), DCP and TDN intakes(per kg W0.75) were also improved(P < 0.01) in the kids fed ALS. Negative growth rate and nitrogen(N) balance(-33.8 and -1.4 g/day, respectively) in kids fed LS became positive(46.9 and 2.0 g/day, respectively) when ALS was used in the diets of kids. Feeding of ALS also increased(P < 0.01) the total N and ammonia N content of strained rumen liquor(SRL). Use of straw(LS or ALS) in TMR increased the digestibility of DM, organic matter and NFE(P < 0.01), intake of energy, as well as total volatile fatty acids concentration(P < 0.01) in the SRL. The present study suggested that optimum performance of kids may be achieved using either ALS alone or TMR with LS or ALS.

关键词： Kids Lentil straw Nutrient utilization Rumen fermentation Total mixed ration Urea ammoniation

Spectrophotometric method for the determination of ketoconazole based on amplification reactions

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Journal of Pharmaceutical Analysis 2012年第1期2卷 43-47页

作者： Shaligram S. rane P. Padmaja Department of Applied Chemistry Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Department of Chemistry Faculty of Science The Maharaja Sayajirao University of Baroda

This paper describes a sensitive spectrophotometric method developed for determination of Ketoconazole (KC) in tablets based on amplification reactions. Ketoconazole was oxidized with periodate, resulting in formation of KC2t and iodate ions. After masking the excess periodate with molybdate, the iodate was treated with iodide to release iodine. The liberated iodine was transformed to ICl2 species and extracted as ion-pair with rhodamine 6G into toluene for spectrophotometric measurement at 535 nm. A linear calibration graph was obtained between 0.2136 mg/mL and 1.7088 mg/mL of Ketoconazole with a molar absorptivity of 5 105 mol L 1 cm 1. The procedure was successfully applied for the determination of ketoconazole in tablet formulation.

关键词： Ketoconazole Spectrophotometry Amplification Periodate Oxidation

Transvaginal natural orifice transluminal endoscopic surgery:A novel gasless technique to hysterectomy

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Laparoscopic, Endoscopic and Robotic Surgery 2022年第1期5卷 35-39页

作者： Suyash Naval Shubhada Jajoo Rucha Naval Jayashri rane Naval Multi Speciality Hospital M.J.College RoadNear Bhaskar MarketJalgaon 425001India Department of Obstetrics and Gynecology Jawaharlal Nehru Medical CollegeWardha 442107India

Transvaginal natural orifice transluminal endoscopic surgery(vNOTES),as a minimally invasive surgery technique,applies CO_(2) for creating pneumoperitoneum,and uses a closed system to through smoke evacuation from a dedicated outlet or *** has the potential to generate aerosol in the operation room,which can lead to an increased risk of transmission of *** technical note introduces a new technique of gasless pure vNOTES to hysterectomy using silicone face mask as a modified vNOTES port.

关键词： Hysterectomy Natural orifice transluminal endoscopic surgery Transvaginal Gasless