bluuebunny/crossref_metadata_2025 huggingface dataset:
Evolutionary transition of doublesex regulation from sex-specific splicing to male-specific transcription in termites
Authors: Miyazaki Satoshi , Fujiwara Kokuto , Kai Keima , Masuoka Yudai , Gotoh Hiroki , Niimi Teruyuki , Hayashi Yoshinobu , Shigenobu Shuji , Maekawa Kiyoto
Published: August 2021

The sex determination gene doublesex (dsx) encodes a transcription factor with two domains, oligomerization domain 1 (OD1) and OD2, and is present throughout insects. Sex-specific Dsx splicing isoforms regulate the transcription of target genes and trigger sex differentiation in all Holometabola examined to date. However, in some hemimetabolous insects, dsx is not spliced sexually and its sequence is less conserved. Here, to elucidate evolutionary changes in dsx in domain organisation and regulation in termites, we searched genome and/or transcriptome databases for the dsx OD1 and OD2 in seven termite species and their sister group (Cryptocercus woodroaches). Molecular phylogenetic and synteny analyses identified OD1 sequences of termites and C. punctulatus that clustered with dsx of Holometabola and regarded them as dsx orthologues. The Cryptocercus dsx orthologue containing OD2 was spliced sexually, as previously shown in other insects. However, OD2 was not found in all termite dsx orthologues. These orthologues were encoded by a single exon in three termites for which genome information is available; they were not alternatively spliced but transcribed in a male-specific manner in two examined species. Evolution of dsx regulation from sex-specific splicing to male-specific transcription may have occurred at an early stage of social evolution in termites.
The formation of impact coesite
Authors: Campanale F. , Mugnaioli E. , Gemmi M. , Folco L.
Published: August 2021

Coesite in impact rocks is traditionally considered a retrograde product formed during pressure release by the crystallisation of an amorphous phase (either silica melt or diaplectic glass). Recently, the detailed microscopic and crystallographic study of impact ejecta from Kamil crater and the Australasian tektite strewn field pointed in turn to a different coesite formation pathway, through subsolidus quartz-to-coesite transformation. We report here further evidence documenting the formation of coesite directly from quartz. In Kamil ejecta we found sub-micrometric single-coesite-crystals that represent the first crystallization seeds of coesite. Coesite in Australasian samples show instead well-developed subeuhedral crystals, growing at the expenses of hosting quartz and postdating PDF deformation.
Coesite (010) plane is most often parallel to quartz {10–11} plane family, supporting the formation of coesite through a topotactic transformation. Such reaction is facilitated by the presence of pre-existing and shock-induced discontinuities in the target. Shock wave reverberations can provide pressure and time conditions for coesite nucleation and growth. Because discontinuities occur in both porous and non-porous rocks and the coesite formation mechanism appears similar for small and large impacts, we infer that the proposed subsolidus transformation model is valid for all types of quartz-bearing target rocks.
Structural characterization and magnetic response of poly(p-xylylene)–MnSb and MnSb films deposited at cryogenic temperature
Authors: Oveshnikov L. N. , Zav’yalov S. A. , Trunkin I. N. , Streltsov D. R. , Chumakov N. K. , Dmitryakov P. V. , Prutskov G. V. , Kondratev O. A. , Nesmelov A. A. , Chvalun S. N.
Published: August 2021

In this study, we employed several experimental techniques to investigate structure and magnetic properties of poly(p-xylylene)–MnSb composites synthesized by low-temperature vapor deposition polymerization technique and MnSb films deposited at various temperatures. The presence of MnSb nanocrystallites in the studied films was verified by the results of X-ray diffraction, electron microscopy and Raman spectroscopy studies. The obtained data revealed the formation of Sb-rich sublayer with well-oriented Sb grains near the susbtrate, which seems to act as a buffer for the consequent poly(p-xylylene)–MnSb or MnSb layer growth. Increasing the polymer content results in qualitative change of surface morphology of studied films. At high polymer content the hybrid nanocomposite with MnSb nanoparticles embedded into poly(p-xylylene) matrix is formed. All investigated samples demonstrated detectable ferromagnetic response at room temperature, while the parameters of this response revealed a complex correlation with nominal composition, presented crystal phases and surface morphology of studied films. Estimated values of the Curie temperature of the samples are close to that of bulk MnSb.
An inter-day assessment of the ABC parameters in the evaluation of progressive keratoconus
Authors: Gustafsson Ingemar , Faxén Tove , Vicente André , Bergström Anders , Ivarsen Anders , Hjortdal Jesper Østergaard
Published: August 2021

The progression of keratoconus is commonly determined by comparing the results of corneal tomographic measurements on different occasions. However, investigations on the repeatability of measurements are commonly performed within the same day, thus not taking the inter-day variation into account. The effect of keratoconus disease severity on the measurement error is also seldom considered. In this post hoc investigation, the parameters A, B and C in the Belin ABCD Progression Display were evaluated in relation to disease severity in intra-day and inter-day measurements. Four consecutive measurements were performed on 61 patients with keratoconus on the same day (intra-day). In another cohort, four consecutive measurements were obtained and then repeated 3 days later in 25 patients with keratoconus and 25 healthy controls (inter-day). The results suggest that the diagnosis of disease progression would benefit from inter-day measurements, and the stratification of the parameters A and C according to disease severity. It is also recommended that tomographic systems such as the Pentacam HR be modified to allow the comparison of both single measurements and the mean of replicate measurements of the parameters used in the assessment of progression of keratoconus.
Fluorescent carbon dots with a high nitric oxide payload for effective antibacterial activity and bacterial imaging
Authors: Liu Shixin , Lv Kai , Chen Ziheng , Li Chengpeng , Chen Tao , Ma Dong
Published: August 2021

Chitosan-graft-poly(amidoamine) (CPA) was used to prepare fluorescent carbon dots (CDs) for high nitric oxide payload, which showed effective antibacterial activity and bacterial imaging.
A review on g-C3N4/graphene nanocomposites: multifunctional roles of graphene in the nanohybrid photocatalyst toward photocatalytic applications
Authors: Patnaik Sulagna , Behera Arjun , Parida Kulamani
Published: August 2021

Schematic representation of the g-C3N4/graphene hybrid photocatalyst.
Structural dynamism of chiral sodium peraza-macrocycle complexes derived from cyclic peptoids
Authors: Schettini Rosaria , D'Amato Assunta , Araszczuk Alicja Malgorzata , Della Sala Giorgio , Costabile Chiara , D'Ursi Anna Maria , Grimaldi Manuela , Izzo Irene , De Riccardis Francesco
Published: August 2021

Peraza-macrocycles are the most studied chelating agents. An efficient approach toward chiral cyclen and hexacyclen ligands, starting from cyclic peptoids, is described.
Synthesis and characterization of a new triazine-based NUV-blue excitable material for phosphor-converted LED technologies
Authors: Luridiana Alberto , Stagi Luigi , Ennas Guido , Carbonaro Carlo Maria , Sforazzini Giuseppe , Ricci Pier Carlo , Secci Francesco
Published: August 2021

A thermally stable fluorescent triazine-based material (TABNO) showing bright solid state photoluminescence has been synthetized. Blending TABNO with K2SiF6:Mn4+ allowed access to a new class of REE free blue excitable warm light-emitting phosphors.
Organocatalytic asymmetric synthesis of benzothiazolopyrimidines via a [4 + 2] cycloaddition of azlactones with 2-benzothiazolimines
Authors: Ke Chaoqi , Liu Zhenzhong , Ruan Sai , Feng Xiaoming , Liu Xiaohua
Published: August 2021

A chiral guanidine-catalyzed [4 + 2] cycloaddition of 2-benzothiazolimines with azlactones characterized by a high yield, ee, and dr and a broad substrate scope has been developed. Gram-scale synthesis and derivatization of the product revealed the potential of utility.
Sol–gel auto combustion synthesis, characterization, and application of Tb2FeMnO6 nanostructures as an effective photocatalyst for the discoloration of organic dye contaminants in wastewater
Authors: Dara Mina , Hassanpour Mohammad , Amiri Omid , Baladi Mahin , Salavati-Niasari Masoud
Published: August 2021

In this study, new double perovskite Tb2FeMnO6 nanoparticles were successfully synthesized by a sol–gel auto combustion method for the first time. The photocatalytic properties of the nanoparticles were also evaluated for the first time.
Characterization of pruned tea branch biochar and the mechanisms underlying its adsorption for cadmium in aqueous solution
Authors: Han Chuan , Wang Miaofei , Ren Yanfang , Zhang Liming , Ji Yu , Zhu Wenjia , Song Yaping , He Junyu
Published: August 2021

In the present study, discarded pruned tea branch was used to prepare a new biochar, and the physicochemical properties and adsorption characteristics were investigated by characterization and batch experiments.
Catalytic enantioselective synthesis of 1,4-dihydropyridines via the addition of C(1)-ammonium enolates to pyridinium salts
Authors: McLaughlin Calum , Bitai Jacqueline , Barber Lydia J. , Slawin Alexandra M. Z. , Smith Andrew D.
Published: August 2021

The regio- and stereoselective addition of C(1)-ammonium enolates – generated in situ from aryl esters and the isothiourea catalyst (R)-BTM – to pyridinium salts allows the synthesis of a range of enantioenriched 1,4-dihydropyridines.
Semi-transparent luminescent solar concentrators based on plasmon-enhanced carbon dots
Authors: Liu Xin , Benetti Daniele , Rosei Federico
Published: August 2021

Plasmonic nanoparticles Ag@SiO2 are applied to improve the optical absorption and emission of carbon dots for enhancing the performance of semi-transparent luminescent solar concentrators.
Pre-programed hydroxy double salt templates for room-temperature controlled synthesis of mixed-metal zeolitic imidazolate frameworks
Authors: Chen Yixin , Yuan Shuchang , Li Yujia , Ma Yongqun , Zhang Chenxiao , Zhang Ming , Mao Qiying , Luo Yingwu , Zhao Junjie
Published: August 2021

Bimetallic hydroxy double salts pre-programed through co-precipitation were found as excellent templates for mixed-metal MOFs.
Investigating the role of GeO2 in enhancing the thermal stability and proton mobility of proton-conducting phosphate glasses
Authors: Omata Takahisa , Sharma Aman , Kinoshita Takuya , Suzuki Issei , Ishiyama Tomohiro , Kohara Shinji , Ohara Koji , Ono Madoka , Fang Tong , Ren Yang , Fujioka Masaya , Zhao Gaoyang , Nishii Junji
Published: August 2021

In this study, the effect of GeO2 on the thermal stability and proton mobility (μH) of proton-conducting phosphate glasses was experimentally investigated using 22HO1/2–3NaO1/2–(12 − x)LaO3/2–xGeO2–63PO5/2 glasses.
Enhanced photoinduced mass migration in supramolecular azopolymers by H-bond driven positional constraint
Authors: Borbone Fabio , Oscurato Stefano Luigi , Del Sorbo Salvatore , Pota Filippo , Salvatore Marcella , Reda Francesco , Maddalena Pasqualino , Centore Roberto , Ambrosio Antonio
Published: August 2021

SRG inscription on azopolymers films is strongly enhanced by constrained azobenzene–chain interaction established through double H-bond supramolecular synthon. Selective removal of azobenzene from patterned samples is possible by solvent rinse.
Exploration of high-performance light-conversion agents based on cyanostilbene and phenanthrenecarbonitrile backbones: E/Z and position isomerism, high-contrast Michael addition reaction activity and intramolecular photocyclization
Authors: Wang Yongtao , Qian Zhean , Li Xueming , Qin Anjun , Guo Yanjun , Tang Benzhong
Published: August 2021

High-contrast Michael addition and intramolecular photocyclization, excellent photostability and significantly enhanced transmittance.
Small-size graphene oxide (GO) as a hole injection layer for high-performance green phosphorescent organic light-emitting diodes
Authors: Miao Yanqin , Yin Mengna , Wang Chengqiang , Wei Xiaozhen , Wang Zhiyuan , Zhao Min , Wang Yiwen , Jia Zhigang , Wang Hua , Zhu Furong
Published: August 2021

Using small size GO as hole injection materials, the fabricated green OLED with Ir(ppy)3 as emitter achieves the maximum current efficiency, power efficiency, and EQE reaching 73.14 cd A−1, 53.95 lm W−1, and 20.63%, respectively.
An in situ polymerized polypyrrole/halloysite nanotube–silver nanoflower based flexible wearable pressure sensor with a large measurement range and high sensitivity
Authors: Du Chen , Zhang Yong , Zhang Dongzhi , Zhang Bao , Zhao Wenhao
Published: August 2021

In this paper, a high-performance piezoresistive sensor based on PPy/HNTs/AgNFs is prepared and has great potential for application in artificial electronic skin, real-time motion detection and medical health monitoring.
A photosensitive-type CPL response controlled by intermolecular dynamic FRET and chiral transfer in ternary chiral emissive nematic liquid crystals
Authors: Yao Kun , Li Yang , Shen Yihao , Quan Yiwu , Cheng Yixiang
Published: August 2021

The chiral emitting ternary liquid crystals (T-N*-LCs) exhibited a photosensitive-type red CPL response controlled by an intermolecular dynamic Förster resonance energy transfer (FRET) mechanism.
Mesenchymal stem cells from biology to therapy
Authors: Kuntin David , Genever Paul
Published: August 2021

Mesenchymal stem cells are as fascinating as they are enigmatic. They appear capable of performing a wide array of functions that cross skeletal biology, immunology and haematology. As therapeutics, mesenchymal stem cells or even just their secreted products may be used to regenerate tissue lost through injury or disease and suppress damaging immune reactions. However, these cells lack unique markers and are hard to identify and isolate as pure cell populations. They are often grown in laboratories using basic and undefined culture conditions. We cannot even agree on their name. While mesenchymal stem cells may lack the developmental understanding and defined differentiation hierarchies of their more illustrious stem cell cousins, they offer a compelling scientific challenge. In depth understanding of mesenchymal stem cell biology will enable us to exploit fully one of the most clinically valuable cell sources.
SOC estimation for lithium‐ion batteries based on a novel model
Authors: Li Jiabo , Ye Min , Gao Kangping , Xu Xinxin
Published: August 2021

Lithium‐ion batteries (LIBs) are widely used in electric vehicles because of their high energy density and less pollution. As an important parameter of the battery management system, accurate estimation of the state of charge (SOC) of the battery can ensure the energy distribution and safe use of the battery. This paper obtains better estimation accuracy from four aspects. First, the battery model is established via Thevenin equivalent circuit model, and the parameters are identified by the forgetting factor recursive least squares. Second, the influence of dual extended Kalman filter on SOC estimation is analysed, a novel algorithm‐based improved dual Kalman filter is proposed. Besides, to reduce the influence of the system noise on the estimation results, an adaptive intelligent algorithm is applied to promote the accuracy of SOC estimation. Finally, compared with the estimated SOC results of the traditional algorithm, the experimental results show the effectiveness of the algorithm.
Reliability‐based hull geometry optimisation of a point‐absorber wave energy converter with power take‐off structural reliability objectives
Authors: Garcia‐Teruel Anna , Clark Caitlyn E.
Published: August 2021

Recent studies have focused on optimising wave energy converter (WEC) designs, maximising their power performance and techno‐economic feasibility. Reliability has yet to be fully considered in these formulations, despite its impact on cost and performance. In this study, this gap is addressed by developing a reliability‐based design optimisation framework for WEC hull geometries to explore the trade‐off between power performance and power take‐off (PTO) system damage equivalent loading (DEL). Optimised hull geometries for two sites are considered (from the centre of the North Sea and off the west coast of Norway), and two directions of motions (heave and surge). Results indicate that site characteristics affect the potential power production and DEL for an optimal WEC design. These are also affected by the direction of motion for power extraction, which also significantly changes optimal hull shape characteristics. Optimal surging WEC designs have edges facing oncoming wave directions, while heaving WECs have pointed bottoms, both to streamline movement. Larger, more convex WECs result in greater power production and DEL, while smaller, more concave WECs result in lesser power production and DEL. These findings underline the importance of considering WEC hull geometry in early design processes to optimise cost, power production, and reliability.
The obliquity and atmosphere of the ultra-hot Jupiter TOI-1431b (MASCARA-5b): A misaligned orbit and no signs of atomic or molecular absorptions
Authors: Stangret M. , Pallé E. , Casasayas-Barris N. , Oshagh M. , Bello-Arufe A. , Luque R. , Nascimbeni V. , Yan F. , Orell-Miquel J. , Sicilia D. , Malavolta L. , Addison B. C. , Buchhave L. A. , Bonomo A. S. , Borsa F. , Cabot S. H. C. , Cecconi M. , Fischer D. A. , Harutyunyan A. , Mendonça J. M. , Nowak G. , Parviainen H. , Sozzetti A. , Tronsgaard R.
Published: August 2021

Ultra-hot Jupiters are defined as giant planets with equilibrium temperatures larger than 2000 K. Most of them are found orbiting bright A-F type stars, making them extremely suitable objects to study their atmospheres using high-resolution spectroscopy. Recent studies show a variety of atoms and molecules detected in the atmospheres of this type of planets. Here we present our analysis of the newly discovered ultra-hot Jupiter TOI-1431 b/MASCARA-5 b, using two transit observations with the HARPS-N spectrograph and one transit observation with the EXPRES spectrograph. Analysis of the Rossiter-McLaughlin effect shows that the planet is in a polar orbit, with a projected obliquity λ = −155−10+20 degrees. Combining the nights and applying both cross-correlation methods and transmission spectroscopy, we find no evidences of Ca I, Fe I, Fe II, Mg I, Na I, V I, TiO, VO or Hα in the atmosphere of the planet. Our most likely explanation for the lack of atmospheric features is the large surface gravity of the planet.
Detection of interstellar H2CCCHC3N
Authors: Shingledecker C. N. , Lee K. L. K. , Wandishin J. T. , Balucani N. , Burkhardt A. M. , Charnley S. B. , Loomis R. , Schreffler M. , Siebert M. , McCarthy M. C. , McGuire B. A.
Published: August 2021

Context. The chemical pathways linking the small organic molecules commonly observed in molecular clouds to the large, complex, polycyclic species long suspected of being carriers of the ubiquitous unidentified infrared emission bands remain unclear.

Aims. To investigate whether the formation of mono- and polycyclic molecules observed in cold cores could form via the bottom-up reaction of ubiquitous carbon-chain species with, for example, atomic hydrogen, a search is made for possible intermediates in data taken as part of the GOTHAM (GBT Observations of TMC-1: Hunting for Aromatic Molecules) project.

Methods. Markov chain Monte Carlo (MCMC) source models were run to obtain column densities and excitation temperatures. Astrochemical models were run to examine possible formation routes, including (a) a novel grain-surface pathway involving the hydrogenation of C6N and HC6N, (b) purely gas-phase reactions between C3N and both propyne (CH3CCH) and allene (CH2CCH2), and (c) via the reaction CN + H2CCCHCCH.

Results. We report the first detection of cyanoacetyleneallene (H2CCCHC3N) in space toward the TMC-1 cold cloud using the Robert C. Byrd 100 m Green Bank Telescope. Cyanoacetyleneallene may represent an intermediate between less-saturated carbon chains, such as the cyanopolyynes, that are characteristic of cold cores and the more recently discovered cyclic species, such as cyanocyclopentadiene. Results from our models show that the gas-phase allene-based formation route in particular produces abundances of H2CCCHC3N that match the column density of 2 × 1011 cm−2 obtained from the MCMC source model, and that the grain-surface route yields large abundances on ices that could potentially be important as precursors for cyclic molecules.
Case study of acid fracturing of Ordovician geothermal reservoir in Taiyun area
Authors: Feng Xingwu , Hu Ruohan , Xing Degang , Yu Qingzhong , Chen Jiawei , Zhang Liping
Published: August 2021

The thermal reservoir in Taiyun area mainly consists of Ordovician and Cambrian carbonate formations. The target interval of example well contains more than 95% carbonate, being thick, argilliferous and have well-developed natural fissures and rich hot water. However, sometimes stimulation is necessary to achieve the designed water production rate. In this paper, multistage alternating injection acid fracturing technology is selected according to lithologic characteristics of geothermal reservoir. A gel acid, which is a composite of 20%HCl+0.8%SHY1+2% corrosion inhibitor+1.5% iron ion stabilizer+1% cleanup additive, is optimized and developed by experimental tests. Its viscosity can reach 27 mPa·s. Then, pumping schedule of multi-stage alternate injection acid fracturing is optimized by numerical simulator of acid fracturing design. It is shown from job pressure of field sample well that resistance reduction ability of gel acid needs to be further improved. Moreover, from the analysis results of pressure decline after acid fracturing, the fluid efficiency is 42.32%, net pressure is 3.3 MPa, and the dynamic fracture length is 107m, the maximum fracture width is 8.6mm by fitting treatment pressure. The water production increase factor reaches 1.2 after acid fracturing treatment. Therefore, the acid fracturing treatment is successful.
Design and simulation of current-fed dual-active full-bridge DC/DC converter control system applied to proton exchange membrane fuel cell
Authors: Dai Fengjiao , Wang Xiang , Kang Wei
Published: August 2021

Proton exchange membrane fuel cells (PEMFC) have been increasingly applied in clean and efficient distributed power generation systems in recent years. However, the output characteristics of PEMFC are relatively soft due to the influence of multiple polarization overvoltage. With the increasement of current density, the output voltage shows to be a nonlinear downward trend. In addition, in order to ensure the lifetime of PEMFC, the output ripple current is often concerned. Considering above characteristics, in order to achieve efficient power transmission of the PEMFC system, this paper adopts the current-fed dual-active full-bridge (DAB) DC/DC converter topology, which can achieve soft switching of most switches. Furthermore, it can restrain the characteristics of the current ripple. Hence, the power transmission efficiency and current ripple requirements of PEMFC are fulfilled. Finally the current-fed DAB is designed and simulated through PSIM. The C-block is applied to simulate the PEMFC nonlinear power supply according to the actual PEMFC parameters. In order to achieve efficient constant power transmission of the nonlinear PEMFC, a novel power closed-loop control strategy is proposed.
Current optimal control method for three-phase dual active bridge converter in light load conditions
Authors: Mu Xiaobin , Wang Xiang , Dai Fengjiao
Published: August 2021

Three-phase dual active bridge converter has many performance advantages, and is widely used in electric vehicle charging, battery energy storage system, power electronic transformer, and other energy conversion occasions. However, in the traditional control method, it has the problem of low efficiency under light load conditions. In this paper, firstly, the power and current expressions of the converter under light load conditions are solved by time-domain analysis, and an optimal current control method under light load conditions is proposed. This control method can simultaneously realize the minimum inductance current stress and RMS. Finally, the effectiveness of this method is verified by experiments.
Determination of four additives in cakes by large volume gradient ion chromatography
Authors: Liu Ye , Gu Pei , Liu Yaling
Published: August 2021

This paper aims to establish a detection method for simultaneous determining four additives in flour products: one simultaneously determines the acesulfame, sodium cyclamate, bromate, and calcium propionate through the selection of ion chromatography pump flow rate, injection volume, eluent concentration, optimization of sample pretreatment and the influence of interfering ions. When using the pump flow rate of 0.8 ml/min, 200 µL large volume injection, 0-14 min, 14-25 min eluent concentration 30 mmol/L gradient elution, 25-26 min eluent concentration 6 mmol/L, flour product is pulverized after addition of water vortex ultrasonic extraction, the supernatant by C18 solid phase extraction (SPE) columns and silver filter, 0.22μm water phase porous membrane testing on the machine, the detection limits of the four kinds of targets are 0.16 μg/ml, 0.19 μg/ml, 0.24 μg/ml, and 0.38 μg/ml, respectively; The standard deviations of retention time and peak area are calcium propionate, respectively 0.13~0.42%, 2.14~4.25% ; bromate 0.20~0.67%, 1.33~4.52% ; sodium cyclamate 0.14~0.53%, 3.57~5.62% ; acesulfame potassium 0.64~0.93%, 0.42~5.81%. This method uses water as the sole extraction solvent and can detect four additives in flour products in a single test. And the pretreatment process is also very simple. When it is applied to other food tests, some compounds may cause interference, which can be assisted by other testing methods.
Distribution of soil corrosion grade in Southern Hebei Province
Authors: Yu Jinxing , Niu Xiangnan , Hou Haiping , Che Kai , Wei Yike , Yu Ning
Published: August 2021

Transmission towers and substations are used in a variety of natural environments, coupled with the interference of the surrounding production and life, facing the test of soil corrosion. Based on the experimental data of 72 soil samples from five cities in Southern Hebei Province, the soil resistivity, soil pH value and soil moisture content were investigated, and the soil corrosion grade and soil corrosion grade distribution map were obtained. It provides a reference for the collection of soil corrosivity data in power transmission and transformation projects.
Study on SO3 emission test of typical ultra-low emission coal-fired units in western region of Inner Mongolia
Authors: Wang Meng , Zhang Zhiyong , Hao Suhua , Wu Yu , He Zhiqiang
Published: August 2021

To study the effect of types of boilers, pollutant treatment facilities and coal quality on SO3, emission concentration of SO3 was tested by controlled condensation method for seven typical ultra-low emissions coal-fired units in western region of Inner Mongolia. The test results showed that the SO3 emission concentration of all units ranged from 0.36 mg/m3 to 2.04 mg/m3, much lower than 5 mg/m3, so there was no need to add SO3 removal facilities. For the units burning the coal of same sulfur content, which adopt LLTESP and WESP has the lower SO3 emission concentration. The SO3 emission concentration can also be controlled at a lower value when SNCR and double-tower double-cycle WFGD technology are adopted in the unit burning medium-high sulfur coal.
Research on the air quality prediction model of Wuhai mining area based on deep learning
Authors: Wang Jinghua , Cheng Jin , Liu Fang , Yan Lei , Tang Taijie
Published: August 2021

With the large-scale and high-intensity mining of coal resources in the Wuhai mining area, the destruction of soil and erosion of rocks has intensified, causing a large amount of surface soil spalling from the mine body and serious damage to the surface vegetation, which has had a serious impact on the quality of the environment in and around the mine. This paper focuses on the corresponding early warning research on air quality in the mining area of Wuhai, and constructs Deep Recurrent Neural Network (DRNN) and Deep Long Short Time Memory Neural Network (DLSTM) air quality prediction models based on the filtered weather factors. The simulation results are also compared and find that the prediction results of DLSTM are better than those of DRNN, with a prediction accuracy of 92.85%. The model is able to accurately predict the values and trends of various air pollutant concentrations in the mining area of Wuhai.
Research on the correlation between green finance and solid waste disposal based on grey correlation
Authors: Wang Wei
Published: August 2021

In this paper, from the current concern of solid waste treatment and disposal, considering the early stage of China’s green finance development, less data years and inconsistent statistical caliber, the relationship between green finance and solid waste treatment and disposal is studied as a grey system, and the grey correlation model is used to analyze the green finance and solid waste There is a strong correlation between the treatment and disposal of solid waste, so as to verify the importance of the development of green finance for the treatment and disposal of solid waste.
Study on water purification effects and microbial community compositions of the estuarine wetland buffer zones during a low-temperature period
Authors: Sun Jiajun , Zhang Panyue , Liang Jinsong , Cai Yajing , Han Yangyang , Li Mengxiang , Wang Zhi , Li Yuping
Published: August 2021

The estuarine wetland buffer zone of the Fuhe river plays an important role in terms of improving water quality of Baiyangdian lake. In this study, the water purification effect and microbial community composition of an estuarine wetland buffer zone during a low-temperature period were investigated (March, 2021). The results indicated that the pre-sedimentation ecological pond (Pep), the subsurface flow wetland (Sfw), and the aquatic plant pond (App) exhibited good removal effects on total phosphorus (TP) and NH3-N. In contrast, the removal effects on chemical oxygen demand (COD) and total nitrogen (TN) was unsatisfied. Various phosphorus removal bacteria were detected in the water samples from the Pep and the Sfw, such as Arthrobacter, Flavobacterium, and Planococcus. These findings indicated the water purification performance and the microbial community composition in an estuarine wetland buffer zone during a low-temperature period.
Spatial accessibility assessment to healthcare facilities: urban and rural areas
Authors: Čábelková Inna , Gardanova Zhanna , Neimatov Eduard , Esaulov Vladimir
Published: August 2021

This research concentrates on the spatial accessibility assessment to healthcare facilities. Specifically, in doing so it compares the situation in urban and rural areas. In many countries, health inequalities continue to be a major public health challenge. Furthermore, there is also urbanization that occurs when people move from rural areas to urban areas. It leads to an increase in urban population and the extent of urban areas. Driven by population growth, many cities in low and middle-income countries are growing at record rates which puts large pressure on the healthcare system and facilities. Our research demonstrates that due to many political, economic, social and cultural factors, the current inequalities in health care between regions, urban and rural areas and different age and income groups are increasing. Thence, there is a pressing need for the improvement of the healthcare in the lagged regions and areas using such means as the advanced technologies, analysis of data, as well as targeted funding and assistance to those who need it the most.
Value-added interregional inequality assessment of border regions in Russia
Authors: Epifanova Natalya S.
Published: August 2021

The economic development of Russian border regions is accompanied by a high level of interregional disparities both within the group of border regions and across the country. The purpose of the article is to assess the degree of interregional inequality of border regions in comparison with inner ones. Based on the key indicator of regional economic development, Gross Regional Product (GRP) per capita, various indicators of interregional inequality (coefficients of variation, the ratio of the maximum value to the minimum value, the Gini and Theil coefficients) were calculated, and σ-convergence and absolute β-convergence were estimated. Estimations of all indicators show that sharp changes in inequality, as well as the level of interregional inequality itself, are characteristic of border regions. For the interior regions, the dynamics are smoother, and the degree of inequality is significantly lower. This allows concluding that the main reason for the formation of interregional inequalities in Russia is inter-regional inequality in the group of border regions.
An attractors-based particle swarm optimization for multiobjective capacitated vehicle routing problem
Authors: Halassi Bacar Abdoul-Hafar , Rawhoudine Said Charriffaini
Published: August 2021

In this paper, a new multiobjective discrete particle swarm algorithm is presented for the Capacitated vehicle routing problem. The binary algorithm integrates particle displacement based on local attractors, a crowding distance as elitism policy and genetic operators. The proposed approach is first implemented on a set of well-known benchmarks for single-objective capacitated vehicle routing problems and compared to results underlined in the literature. The obtained results demonstrate its ability to achieve the main optimization solution and sometimes prove its efficiency from other given techniques. Then, the approach is applied to an academical example for the multiobjective Urban Bus Routing Problem with Route Balancing.
Interventionelle LV-Modulation in der Herzinsuffizienztherapie
Authors: Scheiber Daniel , Westenfeld Ralf
Published: August 2021

Trotz großer Fortschritte in der Akutversorgung des Myokardinfarkts entwickelt ein relevanter Teil der Patienten eine chronische Herzinsuffizienz. Der durch den Infarkt verursachte myokardiale Schaden kann pathologische Umbauprozesse im Herzen wie linksventrikuläre Dilatation, Veränderung der ventrikulären Geometrie und die Ausbildung von Narbengewebe initiieren, die in einer progredienten Herzinsuffizienzsymptomatik und -letalität resultieren können. Verschiedene chirurgische und interventionelle Therapieverfahren zur Modulation der pathologischen Umbauprozesse im Herzmuskel wurden entwickelt. Sie erwiesen sich als sicher und effektiv in der Reduktion linksventrikulärer Volumina, einer Steigerung der linksventrikulären Ejektionsfraktion sowie im Hinblick auf klinische Parameter. Randomisierte prospektive Studien, die einen Überlebensvorteil durch interventionelle oder chirurgische linksventrikuläre Modulation nachweisen, liegen zurzeit nicht vor.
Medical Devices Made of Substances: Possible Innovation and Opportunities for Complex Natural Products
Authors: Bilia Anna Rita , Corazziari Enrico Stefano , Govoni Stefano , Mugelli Alessandro , Racchi Marco
Published: August 2021

The novel Regulation 2017/745/EC on medical devices introduces and strengthens the role of “medical devices made of substances”, which mostly include substances of natural origin. Natural products may follow different regulations, from food to therapeutics. Concerning their isolated constituents, extracts are characterized by a complexity that is not easily tackled from both a scientific and a regulatory point of view, but more importantly, from a therapeutic point of view. The evidence-based approach applied to isolated molecules requires appropriate evidence of quality, efficacy, and safety. The same needs must be reached for complex substances by finding appropriate methods to generate this evidence, and in addition, defining an appropriate regulatory field for them. From a scientific point of view, new methods, such as those proposed by systems biology, are available and applicable to complex substances. From a regulatory point of view, Directive 2001/83/EC on
medicinal products seems to be modeled on single (or combinations of single) molecule products. On the other hand, Regulation 2017/745/EC on medical devices seems to apply to complex substances without derogating on quality, efficacy, and safety. The regulation specifically names and strengthens medical devices that include substances, mostly of natural origin, introducing the official term “medical devices made of substances”. This paper discusses and proposes an interpretation of important terms connected to this legislation, regarding both scientific and regulatory issues, and the opportunities the regulation may give for innovation and therapeutic improvement with natural complex substances.
Herzinsuffizienz-Netzwerke – Struktur, Organisation, Ziele
Authors: Dahm Johannes B. , Perings Stefan
Published: August 2021

Die zunehmende Inzidenz der Herzinsuffizienz, als häufigste zur Krankenhausaufnahme führende Gesundheitsstörung, bedarf in einer demografisch alternden Gesellschaft eines optimierten und ressourcensparenden Diagnostik- und Therapieplans in hierfür spezialisierten sektorenübergreifenden Herzinsuffizienz-Netzwerken (HF-NET), wo nicht nur die häufigen Komorbiditäten und Komplikationen, sondern auch die zunehmende Anzahl zur Verfügung stehender medikamentöser und interventioneller Therapiemöglichkeiten einen interdisziplinären und intersektoralen Versorgungsansatz bei limitierten Ressourcen ermöglicht. Insbesondere vor dem Hintergrund, dass der Verlauf der Herzinsuffizienz durch rezidivierende Dekompensation (meist Volumenretention etc.) charakterisiert ist, ermöglichen die im HF-NET optimierten Versorgungs- und Kommunikationsstrukturen der bei Herzinsuffizienz betroffenen Leistungserbringer, drohende Dekompensationen frühzeitiger und prognostisch relevant zu erkennen und zu
behandeln.
Pflege von peripheren Arterienzugängen bei extrem unreifen Frühgeborenen
Authors: Bruck Antje , Rose Stephanie , Barbara Seipolt , Lars Mense
Published: August 2021

Wenn ein Leben viel zu früh beginnt, beispielsweise mit 24 Schwangerschaftswochen, prasseln tausend Eindrücke auf solch ein kleines Lebewesen ein. Die extrem unreifen Frühgeborenen sind trotz entwicklungsfördernder Pflege rund um die Uhr stressigen Situationen, zum Beispiel wiederkehrenden Blutabnahmen ausgesetzt. Können Frühgeborene von einem peripheren arteriellen Gefäßzugang profitieren, indem Schmerzen reduziert und das Monitoring optimiert werden? Welche Besonderheiten sind bei peripheren Arterienzugängen extrem unreifer Frühgeborener zu beachten?
Analytical study of the sth-order perturbative corrections to the solution to a one-dimensional harmonic oscillator perturbed by a spatially power-law potential V
per(x) = λx
α
Authors: Anh-Tai Tran Duong , Hoang Duc T. , Truong Thu D. H. , Nguyen Chinh Dung , Uyen Le Ngoc , Dung Do Hung , Vy Nguyen Duy , Pham Vinh N. T.
Published: August 2021

In this work, we present a rigorous mathematical scheme for the derivation of the sth-order perturbative corrections to the solution to a one-dimensional harmonic oscillator perturbed by the potential Vper(x) = λxα, where α is a positive integer, using the non-degenerate time-independent perturbation theory. To do so, we derive a generalized formula for the integral I=∫−∞+∞xα⁡exp(−x2)Hn(x)Hm(x)dx, where Hn(x) denotes the Hermite polynomial of degree n, using the generating function of orthogonal polynomials. Finally, the analytical results with α = 3 and α = 4 are discussed in detail and compared with the numerical calculations obtained by the Lagrange-mesh method.
Electric potential in partially magnetized E × B discharges
Authors: Kim June Young , Choi Jinyoung , Hwang Y. S. , Chung Kyoung-Jae
Published: August 2021

Ability to control the electric potential inside the plasma is promising for various applications of E × B plasma because the trajectory of particles, which meets the desired purpose, is mainly determined by the drift motions in the external electric and magnetic fields. In the E × B source, it is well known that the equilibrium states and plasma density and temperature gradient can be sources of plasma instability, which, in turn, affects global plasma parameters. However, the effect of instability on the electric potential has not been verified so far. In this work, correlation of the plasma potential and instability is investigated through simplified-circuit modeling. The consideration of the transverse conductivity of electrons across the magnetic field reflecting the turbulence collision frequency well explains the plasma potential closer to the anode potential despite the presence of negatively biased cathodes. Eventually, this result indicates that the instability can restrict the variation of plasma potential in partially magnetized plasma.
Hirsutella citriformis
. [Descriptions of Fungi and Bacteria].
Authors: UK, CAB International  , Brady B. L. K.
Published: August 2021

A description is provided for
Hirsutella citriformis
. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS:
H. citriformis
has been recorded mainly from
Hemiptera
. GEOGRAPHICAL DISTRIBUTION: Africa, Asia, New Zealand, Hawaii, Solomon Islands. DISEASE:
Hirsutella citriformis
parasitises the brown plant hopper of rice,
Nilaparvata lugens
. As
N. lugens
causes serious outbreaks in the Solomon Islands and elsewhere, and is the vector of the grassy stunt virus of rice,
H. citriformis
has been considered for its control. Strains are listed as available at the Institute fur Biologische Schfidlingsbekfimpfung, Heinrichstrasse 243, 61 Darmstadt, German Federal Republic (Bulletin SROP 1973/3).
Hirsutella thompsonii
. [Descriptions of Fungi and Bacteria].
Authors: UK, CAB International  , Brady B. L. K.
Published: August 2021

A description is provided for
Hirsutella thompsonii
. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Eriophid mites (
Arachnida
). GEOGRAPHICAL DISTRIBUTION: Widespread. DISEASE: McCoy & Kanavel (1969) demonstrated penetration of the integument of living adult rust mites by spores produced in the laboratory. Fisher found internal hyphal bodies in living and in dead rust mites bearing sporing mycelium, the latter attaching the bodies to the leaf bearing the dead mite.
Culicinomyces clavisporus
. [Descriptions of Fungi and Bacteria].
Authors: UK, CAB International  , Onions A. H. S.
Published: August 2021

A description is provided for
Culicinomyces clavisporus
. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS:
Anopheles quadrimaculatus
, the common malarial mosquito;
A. amictus
; and also attacks chironomids and other mosquitoes. DISEASE: Reported as attacking mosquito larvae (Sweeney
et al.
, 1973; Couch, 1974). GEOGRAPHICAL DISTRIBUTION: Recorded from North Carolina, USA (Couch, 1974) and Sydney, Australia (Sweeney, 1973).
Nomuraea rileyi
. [Descriptions of Fungi and Bacteria].
Authors: UK, CAB International  , Onions A. H. S.
Published: August 2021

A description is provided for
Nomuraea rileyi
. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Larvae and pupae of
Lepidoptera
and
Coleoptera
. DISEASE: Attacks larvae in particular, which are killed and become covered in dusty green growth. It has been recorded as producing natural and induced epizootics in soyabean caterpillars (Ignoff
et al., Journal of Invertebrate Pathology
27: 191-198, 1976); on
Heliothis zea
[Helicoverpa zea]
larvae (
Review of Applied Entomology
Ser. A 66, 3679 (USA); 66, 1556 (Australia)); attacking larvae of
Bombyx mori (Review of Applied Entomology
Ser. A 55, 4467; 56, 2843 (Japan)); 66, 2631 records its occurrence on
Utetheisa ornatrixbella
, used to control a weed,
Crotalaria sp
. GEOGRAPHICAL DISTRIBUTION: World wide.
Sclerotinia laxa
. [Descriptions of Fungi and Bacteria].
Authors: UK, CAB International  , Mordue J. E. M.
Published: August 2021

A description is provided for
Sclerotinia laxa
[Monilinia laxa]
. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On almond, apple, apricot, cherry,
Corylus avellana, Fragaria
, loquat, medlar, nectarine, peach, pear, plum,
Prunus
spp.,
Pyrus
spp., quince, rhododendron, grapevine. DISEASE: Brown fruit rot particularly of plum, cherry, peach, nectarine, apricot and quince, less commonly of apple and pear; black apples. Blossom wilt, wither tip, spur blight, twig blight, canker, leaf infection. Considered to be a pathogen of blossom and twigs more than fruit. GEOGRAPHICAL DISTRIBUTION: Morocco, S. Africa; Afghanistan, China, Israel, Japan, Lebanon, Turkey, USSR (Central Asia); Australia, New Zealand; widespread in Europe; Canada, USA, Guatemala, Argentina, Brazil, Chile, Uruguay. CMI Map 44, ed. 4, 1976. TRANSMISSION: Mummified fruits overwinter either on trees or on the ground beneath and at the start of the growing season give rise to sporodochia and, less frequently, apothecia. Conidia also form on other infected organs such as twig cankers and blighted spurs. Conidia and ascospores are capable of initiating infection and are disseminated by air currents and water splash (45, 3581; 48, 3565; 51, 4119; 54, 190). There is a limited amount of spread by vegetative mycelium (42, 207).