bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radionuclide sorption onto nanoiron oxide: Synthesis and application to natural waters
Authors: Vasundhara Dasari , Grandhi Sarika , kumar Susarla Siva , Kaleswararao Thaticharla , Suryakala Duvvuri 
Published: June 2020

Abstract
Expanded requirement for the lanthanides in industrial stuff resulted in intensified manufacture of lanthanide containing ores. This increases public contact to the lanthanides, both from production wastes/effluents and from various commercial products. Present study describes the efficacy of γ-Fe2O3 (nano maghemite) for fast adsorption of some of the long-lived, toxic and radioactive human made radio nuclides from natural waters. Nanometal oxides have been successfully prepared by precipitation synthesis followed by thermal decomposition of transition metal oxides, These are further characterized by different physico-chemical techniques like XRD, UV-Vis-DRS, TEM, FTIR and BET analysis. Adsorption capacities of REEs like La(III), and Nd(III) are observed through ICPAES technique. The parameters influencing the adsorption capacity, which includes pH, contact time, initial concentration, and temperature are optimized. The adsorption kinetics and thermodynamics are analysed. These results proved that nanometal oxide (γ-Fe2O3) have been successfully prepared by precipitation synthesis followed by thermal decomposition of transition metal oxides, and followed a novel method to mollify the seriousness of nuclear waste contamination, which leads to successful evaluation for environmental problems.
Microstructural Investigation on Heat Treatment of Hypoeutectic High Chromium White Cast Irons
Authors: Ngqase Mbulelo , Pan Xiaowei 
Published: June 2020

Abstract
High chromium white cast irons (HCWCI) are widely used as abrasion resistant materials in cement manufacturing, mineral processing and slurry pumping industries. Their high resistance to wear in these demanding situations stems from the presence of hard eutectic (Cr, Fe)7C3 carbides in their microstructures. In this context, the properties of hypoeutectic iron of HCWCI containing 25 wt. %Cr-2.5 wt. %C were investigated after destabilisation heat treatments, cooling (slow and fast cooling) to ambient temperatures, their influence on the microstructure was investigated. For characterization of the hypoeutectic iron of HCWCI, several experimental tests were performed using the following laboratory equipment: light optical microscope, scanning electron microscope. The amount of retained austenite also depends on the alloying additions in the melt during melting processes, destabilisation temperatures, soaking time and the cooling rates during heat treatment processes.
Effect of V2O5 on the Properties of Lithium Bismuth Borate Glasses
Authors: Raut V D , Deshpande A V , Satpute N S 
Published: June 2020

Abstract
The series of the glasses with general formula (40-x)Li2O:30B2O3:30Bi2O3:xV2O5, with x = 0, 0.5, 1.0, 1.5 and 2.0 mol% was prepared using conventional quenching technique. The glass transition temperature Tg for these samples were determined from Differential Thermal Analysis. The glass transition temperature increases beyond 0.5 mol%. It was found that the glasses under study consist of randomly connected BO3 & BO4 structural units. The density and molar volume of glasses were found to depend on V2O5 content. Initially the density increases, molar volume and glass transition temperature decrease with the addition of V2O5. This suggests that when V2O5 is added to the glass initially up to 0.5 mol% it may be entering as a modifier. Beyond 0.5 mol% density decreases and molar volume increases as V2O5 goes as former. This reveals the role of V2O5 as a glass network former beyond 0.5 mol%. Optical band gap energy decreases and cut off wavelength increases with increase in V2O5 content.
Comparative Analysis of Sodium Hexa-titanate (Na2Ti6O13) & Sodium-Potassium Hexa-titanate (Na1.5K0.5Ti6O13)
Authors: Alam N , Khatoon T , Chandel V S , Azam A , Rashmi  
Published: June 2020

Abstract
The present paper discusses the synthesis and characterization of Sodium Hexatitanate (NHT) and Sodium-Potassium Hexa-titanate (NKHT) by solid state reaction method. The phase of the synthesized material was confirmed by XRD and the particle size has been calculated using Debye-Scherrer relation. Morphology of the surface and dimensions of the crystals have been analysed using FE-SEM analysis at different magnification. EDS analysis has also been done for elemental analysis of Sodium Hexa-titanate and Sodium Potassium Hexa-titanate. IR spectra has been recorded for getting various vibration modes of the samples.
Enhanced Electrical and Optical properties of Al doped and ZnO nanoparticles for Optoelectronic Application: Eco-friendly Green Route
Authors: Ragupathi Veena , Madhu babu Manukonda , Panigrahi Puspamitra , Ganapathi Subramaniam N. 
Published: June 2020

Abstract
Optoelectronic materials have been developed greatly due to the wide usage of Liquid crystal displays, touch screens and light-emitting devices. In this work, a simple, eco-friendly green synthesis method has been adopted for the synthesis of pure and Al doped ZnO nanoparticles (1, 3 and 5 wt. %). Bio-extract was extracted from Citrus Aurantium peel. The structural, optical and electrical properties of the as-synthesized material were analyzed by X-ray diffraction, Scanning Electron Microscopy, UV-Visible spectroscopy and Hall Effect measurements. XRD spectra indicate the presence of hexagonal wurtzite structure. The crystalline size is decreased with increasing Al concentration. Scanning electron microscopy results indicate that the addition of Al changes the morphology from rod shape to platelets shape. UV-Visible results infer the shift in the band edge towards lower wavelength and the bandgap increases with Al concentration. Hall effect measurements reveals the enhanced carrier concentration in 5 wt% Al doped ZnO with the values of 1.3 × 1021 cm−3.
Development and performance tests of μ-PIC with DLC electrodes
Authors: Ochi A , Yamane F , Ishitobi Y , Setsuda H 
Published: June 2020

Abstract
Micro pixel chambers (μ-PIC) with resistive cathodes have been developed as particle tracking/imaging detectors in high-rate high ionizing particle (HIP) environments. A main target of their development is as a forward muon detector in the ATLAS phase-2 upgrade. The cathode is made from DLC (diamond-like carbon) thin foil by the liftoff method. Using the resistive cathodes, the discharge (spark) probability within the HIP environment was reduced (10-1000 times) and two-dimensional readouts for the incident particles are available using a 400-micron pitch separated pixel array. We measured the tracking performances for the charged particles using a 140 GeV muon beam in CERN’s H4 beam line and also measured the imaging properties of 8 keV X-rays. Two-dimensional fine position resolutions (< 100 micron) were obtained. These results show that the resistive μ-PIC is one of strong candidate for forthcoming high-rate particle experiments.
New results from GridPix Detectors
Authors: Bilevych Y , Desch K , Fransen J-P , Van Der Graaf H , Gruber M , Hartjes F , Van Der Heijden B , Heijhoff K , Ietswaard C , John D , Kaminski J , Kluit P , Van Der Kolk N , Korporaal A , Ligtenberg C , Van Petten O , Raven G , Rövekamp J , Schiffer T , Schmidt S , Timmermans J 
Published: June 2020

Abstract
GridPix structures combine the high resolution of a pixel readout chip with a Micromegas as gas amplification stage. This detector has shown excellent performance before with the Timepix ASIC, but has been improved by using the successor ASIC, the Timepix3. This new version of the GridPix detectors has been used in test beams at the ELSA accelerator at Bonn, where 2.5 GeV electrons are available for tracking studies. It could be demonstrated that the spatial resolution in both transverse and longitudinal direction follows the diffusion function.
Structures made of four GridPixes have been designed and constructed to cover larger areas. Also these devices called quads have been successfully tested with the electron beam giving similarly good results as the single GridPix detector.
Effects of gas mixture quality on GEM detectors operation
Authors: Guida R , Mandelli B , Corbetta M 
Published: June 2020

Abstract
Gas Electron Multiplier (GEM) detectors have been successfully operated in the LHCb experiment and they will be installed in the CMS and ALICE experiments during LHC Long Shutdown 2. As for others LHC gaseous detector systems, gas mixture is individually provided by dedicated Gas Systems. Several studies have been performed in laboratory to characterize GEM performance from the point of view of their use in LHC Gas Systems, where many variables can influence detectors operation. A Triple-GEM prototype was tested with the aim of probing the possible effects of specific changes that could occur in the Gas System, such as variations in gas mixture composition, input gas flow and presence of impurities. A complete overview of the obtained results will be presented. The test confirms the importance of having a stable gas mixture composition, as it influences GEMs working point, with significant variations in the amplification gain. It was also seen how the input gas flow can affect GEMs performance, since it conditions the accumulation of humidity and air. Moreover, it was found that the presence of pollutants such as O2, N2 and H2O, commonly present during operation in the experiments, influences GEMs performance in terms of signal efficiency and amplification gain. While detector gain is weakly affected by the presence of N2, the presence of even small concentrations of O2 causes a significant performance decrease in terms of amplification gain.
Application of micro-pattern gas detectors in the present and future experiments in Budker INP
Authors: Fedotovich G. , Kozyrev A. , Kudryavtsev V. , Logashenko I. , Maltsev T. , Ruban A. , Shekhtman L. , Sokolov A. 
Published: June 2020

Abstract
Micro-pattern gas technology is planned for the upgrade of the tracking system of the CMD-3 detector at the VEPP-2000 electron-positron collider in Budker INP. The upgrade includes a new cylinder tracking and trigger detector that consists of two tracking layers at a radius of 32 to 33 cm with coordinate resolution close to 0.1 mm in Z (along the beam axis) and trigger segments of about 1 cm in phi. Another new coordinate subsystem includes two end-cap discs with active area between radius of 50 mm and 250 mm, that provides spatial resolution in R and in phi close to 1 mm as well as trigger signal from the phi segments. For these two subsystems we plan to use micro-RWELL technology because it allows much simpler assembling of large cylindrical detector and large discs due to more rigid glass-fiber support as compared to the triple GEM technology. The new cylindrical detector and end-cap discs of the CMD-3 are considered as a prototypes of the Inner Tracker of the detector for the future Super C-Tau Factory (SCTF) at Budker INP. The SCTF is an electron-positron collider for the energy range of 3-7 GeV in the center of mass system that will provide luminosity of 1035 cm−2s−1. Coordinate system of the detector for the SCTF will include among other systems, the Inner Tracker and the end-cap discs. The Inner Tracker will be 60 cm long and occupy radius up to 20 cm, while the end-cap discs will have radius up to 180 cm and will have to provide trigger signal. For the end-cap discs the MPGD option is considered based either on the triple-GEM or on the micro-RWELL, while for the Inner Tracker three main options are competing: compact Time Projection Chamber, silicon micro-strip tracker and cylindrical MPGD tracker. The first results of simulations with all these options are presented with preliminary discussion about the choice of the option.
MUon Survey Tomography based on Micromegas detectors for Unreachable Sites Technology (MUST2): overview and outlook.
Authors: Roche Ignacio Lázaro , Decitre J B , Gaffet S 
Published: June 2020

Abstract
The use of Micro-Pattern Gaseous Detectors in geophysics and civil engineering applications has experienced an increase related to the incorporation of muon tomography in these fields. The Temporal Tomography of Density by the Measurement of Muons project has developed a new direction-sensitive tool for muon flux measurement based on a thin time projection chamber with a bulk-Micromegas readout and SRS electronics. This configuration presents interesting distinctive features, allowing a wide angular acceptance of the detector with a low weight and compact volume. The functioning principle of the device, the results of the characterisation tests, the ongoing work to improve its performance and the next phase to scale up the existing muon camera network at the Low Background Noise Laboratory of Rustrel are presented.
Development of a low power and high integration readout ASIC for time projection chambers in 65 nm CMOS
Authors: Liu Wei , Deng Zhi , Li Fule , Gu Xian , Li Yulan , Qi Huirong 
Published: June 2020

Abstract
The paper presents the development of a low power readout ASIC for time projection chambers (TPCs) for the CEPC (Circular Electron Positron Collider) experiments. In order to achieve high spatial and momentum resolution, large number of readout channels is demanded with waveform sampling capability in the resolution of 8-10 bit and the sampling rate of 10-40 MS/s. Power consumption became critical and has been addressed by using advanced 65 nm CMOS process and simplifying the analog circuits in our design. The prototype chip has been developed including the analog front-end and the waveform sampling SAR (Successive Approximation Register) ADC. This paper will present the detailed circuit design and test results. The development of the digital trapezoidal filter will also be described.
Patch antenna for nonlinear radar
Authors: Balzovsky E V , Brezgulevsky D S 
Published: June 2020

Abstract
The design of a dual-band patch antenna for a nonlinear radar operating at combinational frequencies has been developed. The antenna has a rectangular emitter surrounded by dielectric layers over a metal screen. The emitter has a U-shaped slot. The results of simulation and measurements of the antenna sample parameters are presented. The antenna is matched with the feeder at the frequencies near 1.3 and 1.6 GHz, and in the range beyond these frequencies the antenna operates as a notch-filter. The antenna has a unidirectional pattern. The radiation maximum is directed perpendicular to the plane of the antenna.
On chiral medium with zero permittivity and permeability values
Authors: Fisanov V V 
Published: June 2020

Abstract
The possibility of propagation of electromagnetic waves of circular polarization in a Tellegen isotropic chiral medium with zero values of dielectric permittivity and magnetic permeability (chiral nihility) is considered. The refractive indices of normal waves are analyzed using the forward and backward wave identifier. In the presence of dissipative losses, the existence of two different normal waves in such a medium is impossible.
Implementation of techniques and design of equipment for the production of the food liquids
Authors: Drozdova T , Biryukov A , Kachaeva N , Nazarenko M , Stribizheva L , Strukova V 
Published: June 2020

Abstract
This article discusses the rationale for the implementation of techniques and design of equipment, allowing to assess the quality and authenticity of sparkling wines produced in the Krasnodar region. There is an urgent question about the methods of monitoring and detecting fraud in the production and import of sparkling wines at stable positive tendency to increase volumes of these products. The main drawback of the regulatory documentation is the lack of methods for recognizing the naturalness of products presented to the consumer, which increases the risks of producing products that do not meet the requirements. In this regard, the capabilities of software and hardware systems are shown, which make it possible to assess the quality and authenticity of sparkling and carbonated wines, as well as to study the physicochemical properties of food liquids with a two-phase “liquid-CO2” system. It was established that this set of techniques allows to determine the quality indicators of sparkling and carbonated wines, as well as to analyze the applied technological methods of production and to identify the authenticity of the analyzed object. An analysis of the sparkling properties of wine confirms the influence of the biochemical factor of yeast biomass on the processes of CO2 binding to wine components during champagne and shows a fundamental difference in the cavitation desorption of carbon dioxide from sparkling and carbonated wines.
ABS and PLA sub-terahertz absorbers for 3D-printing technology
Authors: Dorozhkin K V , Teterina D D , Badin A V , Moskalenko V D 
Published: June 2020

Abstract
The results of research of the dielectric properties of absorbers based on commercial composite plastics for 3D printing in the sub-terahertz frequency range are presented. Spectra of the complex dielectric constant of plastics based on acrylonitrile butadiene styrene and polylactide with the addition of carbon nanoparticles in the frequency range 115-258 GHz are shown. The calculated transmission, reflection, and absorption spectra for the layers of the adsorbent with a thickness of 0.5 to 2 mm are presented.
Dielectric permeability of multiwall carbon nanotubes based composites, which are measured by a resonator method
Authors: Chervinskaya A S , Dotsenko O A , Potselueva A A 
Published: June 2020

Abstract
The paper presents the results of measurements of the dielectric constant of composite materials, both solid and porous, containing multi-walled carbon nanotubes (MWCNT) as an inclusion, and water-dispersion color as a binder. The rectangular cavity was used to measurements. It is shown that the location of the sample in the cavity affects the accuracy of measurements. The permittivity spectra of the solid samples shows that the addition of nanotubes to the binder leads to shifting the dispersion range to the low-frequency region. The results show that materials can be used as radar absorbers.
Temperature distribution in microwave chamber using the phantom limb
Authors: Badin A V , Dunaevskii G E , Nechaev A N 
Published: June 2020

Abstract
This paper presents results of temperature distribution in the phantom limb under the influence of microwave radiation. Authors had been developed automated installation based on linear positioner and temperature detector for measuring thermal field distribution in phantom of human hand. It was shown that under the influence of impulse microwave radiation having a power of 40W at the phantom during 6 minutes leads to equable warming along longitudinal axis of phantom.
Background method of radar detection of a moving small target object in the task of classifying active radars
Authors: Anikin A S , Khristenko A V , Ochirtarov A V 
Published: June 2020

Abstract
The article deals with the classification of radar equipment based on two features: on the location of the receiving and transmitting points in space, as well as by the method of generating an informative signal at the receiving point. The most significant parameters in the development of a moving target detector near the underlying surface have been observed.
The ABCF gene family facilitates disaggregation during animal development
Authors: Skuodas Sydney , Clemons Amy , Hayes Michael , Goll Ashley , Zora Betul , Weeks Daniel L. , Phillips Bryan T. , Fassler Jan S. 
Published: June 2020

Skuodas and Clemons et al. show that protein aggregation is pervasive during early development and that the ABCF family of soluble ATP-binding proteins, which are encoded by animal genomes and expressed embryonically, regulate disaggregation and are instrumental for a normal developmental program.
High leaf mass per area Oryza genotypes invest more leaf mass to cell wall and show a low mesophyll conductance
Authors: Ye Miao , Zhang Zhengcan , Huang Guanjun , Xiong Zhuang , Peng Shaobing , Li Yong 
Published: June 2020

Abstract
The intraspecific variations of leaf structure and anatomy in rice leaves and their impacts on gas diffusion are still unknown. Researches about the tradeoff between structural compositions and intracellular chemical components within rice leaves are still lacking. The objectives of the present study were to investigate the varietal differences in leaf structure and leaf chemical compositions, and the tradeoff between leaf structural tissues and intracellular chemical components in rice leaves. Leaf structure, leaf anatomy, leaf chemical composition concentrations and gas exchange parameters were measured on eight Oryza sativa L. genotypes to investigate the intraspecific variations in leaf structure and leaf anatomy and their impacts on gas exchange parameters, and to study the tradeoff between leaf structural compositions (cell wall compounds) and intracellular chemical components (non-structural carbohydrates, nitrogen, chlorophyll). Leaf thickness increased with leaf mass per area (LMA), while leaf density did not correlate with LMA. Mesophyll cell surface area exposed to intercellular airspace (IAS) per leaf area, the surface area of chloroplasts exposed to IAS and cell wall thickness increased with LMA. Cell wall compounds accounted for 71.5 % of leaf dry mass, while mass-based nitrogen and chlorophyll concentrations decreased with LMA. Mesophyll conductance was negatively correlated with LMA and cell wall thickness. High LMA rice genotypes invest more leaf mass to cell wall and possess a low mesophyll conductance.
Investigations of sequencing data and sample type on HLA class Ia typing with different computational tools
Authors: Yi Jian , Chen Longyun , Xiao Yajie , Zhao Zhikun , Su Xiaofan 
Published: June 2020

Abstract
Human leukocyte antigen (HLA) can encode the human major histocompatibility complex (MHC) proteins and play a key role in adaptive and innate immunity. Emerging clinical evidences suggest that the presentation of tumor neoantigens and neoantigen-specific T cell response associated with MHC class I molecules are of key importance to activate the adaptive immune systemin cancer immunotherapy. Therefore, accurate HLA typing is very essential for the clinical application of immunotherapy. In this study, we conducted performance evaluations of 4 widely used HLA typing tools (OptiType, Phlat, Polysolver and seq2hla) for predicting HLA class Ia genes from WES and RNA-seq data of 28 cancer patients. HLA genotyping data using PCR-SBT method was firstly obtained as the golden standard and was subsequently compared with HLA typing data by using NGS techniques. For both WES data and RNA-seq data, OptiType showed the highest accuracy for HLA-Ia typing than the other 3 programs at 2-digit and 4-digit resolution. Additionally, HLA typing accuracy from WES data was higher than from RNA-seq data (99.11% for WES data versus 96.42% for RNA-seq data). The accuracy of HLA-Ia typing by OptiType can reach 100% with the average depth of HLA gene regions &gt;20x. Besides, the accuracy of 2-digit and 4-digit HLA-Ia typing based on control samples was higher than tumor tissues. In conclusion, OptiType by using WES data from control samples with the high average depth (&gt;20x) of HLA gene regions can present a probably superior performance for HLA-Ia typing, enabling its application in cancer immunotherapy.