bluuebunny/crossref_metadata_2025 huggingface dataset:
Chlamydia trachomatis serovars in urogenital and ocular samples collected 2014–2017 from Austrian patients
Authors: Lesiak-Markowicz Iwona , Schötta Anna-Margarita , Stockinger Hannes , Stanek Gerold , Markowicz Mateusz
Published: December 2019

Infection of humans with Chlamydia trachomatis, a bacterial pathogen with a unique intracellular replication cycle, may cause a variety of clinical manifestations. These are linked to various serovars of the pathogen; trachoma to serovars A-C, oculogenital infections to serovars D-K, and lymphogranuloma venereum to serovars L1-L3. Nineteen serovars are known as human pathogens. The aim of the study was to determine the serovars of 401 C. trachomatis DNA positive extracts from original clinical specimens of patients in Austria including cervical and urethral swabs, urine, genital secretions and conjunctival swabs - collected from 2014 to 2017. Sequence analysis of the omp1 gene, encoding major outer-membrane protein was performed on each sample. In 50.1% of samples serovar E was identified and serovars F, D/Da and G/Ga were found in 16.2%, 9.7% and 9.0%, respectively. Remaining serovars were J (6.0%), K (4.7%), H (2.7%), B/Ba (1.0%), and I/Ia (0.5%). In 19 patients follow up samples could be tested. The majority of C. trachomatis serovars were associated with urogenital tract infections (D-K), however, one of them – serovar B/Ba - is linked to both, ocular and genital tract infection.
A novel application of hematite precipitation for high effective separation of Fe from Nd-Fe-B scrap
Authors: Lin Xue , Qu Zhan , Chen Yu , Jin Ruinan , Su Ting , Yu Yang , Zhu Suiyi , Huo Mingxin , Peng Juwei , Wang Zhaofeng
Published: December 2019

Rare earths, e.g. neodymium (Nd), praseodymium (Pr) and dysprosium (Dy), are abundant in the rare earth sintered magnet scrap (Nd-Fe-B scrap), but their recycling is tedious and costly due to the high content of impurity Fe. Herein, a novel approach was developed to effectively recycle rare earths from the scrap via an integrated acid dissolution and hematite precipitation method. The scrap contained 63.4% Fe, 21.6% Nd, 8.1% Pr and 3.9% Dy. It was dissolved in nitric, hydrochloric and sulfuric acids, separately. Nearly all impurity Fe in the scrap was converted to Fe3+ in nitric acid but was converted to Fe2+ in hydrochloric and sulfuric acids. After hydrothermal treatment, the rare earths in the three acids were almost unchanged. From nitric acid, 77.6% of total Fe was removed, but total Fe was not from the hydrochloric and sulfuric acids. By adding glucose, the removal of total Fe was further increased to 99.7% in nitric acid, and 97% of rare earths remained. The major mechanism underlying total Fe removal in nitric acid was the hydrolysis of Fe3+ into hematite, which was promoted by the consumption of nitrate during glucose oxidation. This method effectively recycled rare metals from the waste Nd-Fe-B scrap and showed great potential for industrial application.
Labour sharing promotes coexistence in atrazine degrading bacterial communities
Authors: Billet Loren , Devers Marion , Rouard Nadine , Martin-Laurent Fabrice , Spor Aymé
Published: December 2019

Microbial communities are pivotal in the biodegradation of xenobiotics including pesticides. In the case of atrazine, multiple studies have shown that its degradation involved a consortia rather than a single species, but little is known about how interdependency between the species composing the consortium is set up. The Black Queen Hypothesis (BQH) formalized theoretically the conditions leading to the evolution of dependency between species: members of the community called ‘helpers’ provide publicly common goods obtained from the costly degradation of a compound, while others called ‘beneficiaries’ take advantage of the public goods, but lose access to the primary resource through adaptive degrading gene loss. Here, we test whether liquid media supplemented with the herbicide atrazine could support coexistence of bacterial species through BQH mechanisms. We observed the establishment of dependencies between species through atrazine degrading gene loss. Labour sharing between members of the consortium led to coexistence of multiple species on a single resource and improved atrazine degradation potential. Until now, pesticide degradation has not been approached from an evolutionary perspective under the BQH framework. We provide here an evolutionary explanation that might invite researchers to consider microbial consortia, rather than single isolated species, as an optimal strategy for isolation of xenobiotics degraders.
Author Correction: Selection of suitable reference genes for gene expression studies in myxosporean (Myxozoa, Cnidaria) parasites
Authors: Kosakyan Anush , Alama-Bermejo Gema , Bartošová-Sojková Pavla , Born-Torrijos Ana , Šíma Radek , Nenarokova Anna , Eszterbauer Edit , Bartholomew Jerri , Holzer Astrid S.
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Drug screening of cancer cell lines and human primary tumors using droplet microfluidics
Authors: Wong Ada Hang-Heng , Li Haoran , Jia Yanwei , Mak Pui-In , da Silva Martins Rui Paulo , Liu Yan , Vong Chi Man , Wong Hang Cheong , Wong Pak Kin , Wang Haitao , Sun Heng , Deng Chu-Xia
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Association of TLR4 and TLR9 polymorphisms and haplotypes with cervical cancer susceptibility
Authors: Pandey Nilesh O. , Chauhan Alex V. , Raithatha Nitin S. , Patel Purvi K. , Khandelwal Ronak , Desai Ajesh N. , Choxi Yesha , Kapadia Rutul S. , Jain Neeraj D.
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Impact of sanitation and socio-economy on groundwater fecal pollution and human health towards achieving sustainable development goals across India from ground-observations and satellite-derived nightlight
Authors: Mukherjee Abhijit , Duttagupta Srimanti , Chattopadhyay Siddhartha , Bhanja Soumendra Nath , Bhattacharya Animesh , Chakraborty Swagata , Sarkar Soumyajit , Ghosh Tilottama , Bhattacharya Jayanta , Sahu Sohini
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Chemoinformatics Representation of Chemical Structures – A Milestone for Successful Big Data Modelling in Predictive Toxicology
Authors: Kochev Nikolay , Jeliazkova Nina , Tsakovska Ivanka
Published: December 2019

Within the computational toxicology field, the representation of a chemical structure is considered as a key to predict/retrieve the toxicity information for a substance. Chemoinformatics provides efficient tools to computationally handle the chemical information. This is even more important in a big data era with an increasing amount of information on chemical compounds available, the endeavour to link activity information to chemicals, also across different databases, and the need of unambiguous identification of chemicals and taking into account structural features for modelling. This chapter gives an overview of the different aspects of chemical structure representation used in chemoinformatics. Various techniques for chemical information formalisation are provided, together with the different levels of structure representation starting from 0D (0 dimension) and going to the more complex 3D and 4D as essential for interactions with biomacromolecules. Structural descriptors that represent the chemical structure in the bioactivity modelling are introduced. Furthermore, the challenges in unique structure representations, chemical substances representation, as well as specific issues such as handling aromaticity and tautomerism are discussed. The approaches show how to represent structural information within chemical software applications in the context of storing/searching structural data in big databases and its use for predictive modelling purposes.
Making Big Data Available: Integrating Technologies for Toxicology Applications
Authors: Jeliazkova Nina , Jeliazkov Vedrin
Published: December 2019

The data resources in toxicology are characterised primarily by their variety, with the data volume also becoming significant when considering integration with biological databases such as toxicogenomics data. The chapter presents an overview of data integration approaches from the information technology point of view (data warehouses, virtual integration, schema and entity matching techniques) as well as from the bioinformatics point of view, i.e., integrative data analysis. Integration of different data sources requires the “shared representation of a domain”, which is best implemented by the use of ontologies, standard representations and Application Programming Interfaces (API). The chapter refers to an extensive number of resources and applications as an illustration of the existing approaches of data resource sharing, linking and integration. The importance of cloud technology, encompassing data storage, cheminformatics and data analysis tools is highlighted and the existing and emerging data sharing infrastructure is outlined, all supporting the handling and use of big data in the field of (predictive) toxicology.
Storing and Using Qualitative and Quantitative Structure–Activity Relationships in the Era of Toxicological and Chemical Data Expansion
Authors: Sild Sulev , Piir Geven , Neagu Daniel , Maran Uko
Published: December 2019

Emerging Big Data technologies and the growing amount of data in predictive toxicology (and in chemistry in general) require new solutions and methods for large-scale data and model storage, as well as for model representation and analysis. Knowledge extraction from big and diverse toxicology and chemistry data results in mathematical models that are used to organise and systematise data and structure patterns. Consequently, next to the developments in data organisation and analysis, the systematic representation and organisation of descriptive and predictive qualitative and quantitative structure–activity relationships, (Q)SARs, is equally important. Therefore, full attention from model developers is required to make the new knowledge derived from the data and models easily accessible and usable. This chapter considers issues related to the organisation of (Q)SAR models and gives an overview of the file and data formats used to organise predictive models as well as their storage solutions in the era of data expansion.
An osteoconductive PLGA scaffold with bioactive β-TCP and anti-inflammatory Mg(OH)2 to improve in vivo bone regeneration
Authors: Go Eun Jin , Kang Eun Young , Lee Seul Ki , Park Sookhyun , Kim Jae Hwa , Park Wooram , Kim Ik Hwan , Choi Bogyu , Han Dong Keun
Published: December 2019

Poly(lactic-co-glycolic acid) (PLGA) has been widely used as a biomaterial for pharmaceutical and medical applications.
A rings-in-pores net: crown ether-based covalent organic frameworks for phase-transfer catalysis
Authors: Shen Ji-Chuang , Jiang Wei-Ling , Guo Wen-Di , Qi Qiao-Yan , Ma De-Li , Lou Xiaobing , Shen Ming , Hu Bingwen , Yang Hai-Bo , Zhao Xin
Published: December 2019

The crown ether-based covalent organic frameworks show excellent phase-transfer catalytic performance in various nucleophilic substitution reactions.
Controllable Co@N-doped graphene anchored onto the NRGO toward electrocatalytic hydrogen evolution at all pH values
Authors: Jiang Lijuan , Qiu Lijun , Cen Tianlun , Liu Yi-Yi , Peng Xiaomin , Ye Zhifeng , Yuan Dingsheng
Published: December 2019

Cobalt @ tunable N-doped graphene shells anchored on N-doped RGO is designed as an efficient pH-universal electrocatalyst. The superior performance is mainly attributed to the optimization of the electrocatalytic centre and electronic configuration.
Multi-component supramolecular gels induce protonation of a porphyrin exciplex to achieve improved collective optical properties for effective photocatalytic hydrogen generation
Authors: Yang Gengxiang , Lin Chenxiang , Feng Xuenan , Wang Tianyu , Jiang Jianzhuang
Published: December 2019

Two-porphyrin supramolecular gels induce exciplex formation, protonation and J-aggregation of porphyrins, which render a smaller bandgap, charge separation and good photocatalytic properties.
Facile and scalable synthesis of topologically nanoengineered polypeptides with excellent antimicrobial activities
Authors: Zhang Yu , Song Wenliang , Li Shuwei , Kim Dae-Kyoung , Kim Jae Ho , Kim Jung Rae , Kim Il
Published: December 2019

A facile and scalable strategy for the quick library synthesis of linear-, hinged-, star-, and cyclic-polypeptides with broad-spectrum antimicrobial activity has been reported.
A novel acceptor with aN,N-dialkyl thieno[3′,2′:2,3]indolo[7,6-g]thieno[3,2-b]indole (TITI) core for organic solar cells with a high fill factor of 0.75
Authors: Zhang Xin , Ding Yunqian , Wan Xiangjian , Ke Xin , Li Chenxi , Chen Yongsheng
Published: December 2019

We report a promising acceptor based on a fused-core,N,N-dialkyl thieno[3′,2′:2,3]indolo[7,6-g]thieno[3,2-b]indole (TITI), which exhibited a high FF of 0.75.
Reconstructed transparent conductive layers of fluorine doped tin oxide for greatly weakened hysteresis and improved efficiency of perovskite solar cells
Authors: Wu Jinbo , Zhen Chao , Wu Tingting , Jia Chunxu , Haider Mustafa , Liu Gang , Cheng Hui-Ming
Published: December 2019

A reconstructed transparent conductive FTO film leads to an improved power conversion efficiency and weakened hysteresis behaviour of perovskite solar cells.
Chemistry of Herz radicals: a new way to near-IR dyes with multiple long-lived and differently-coloured redox states
Authors: Makarov Alexander Yu. , Volkova Yulia M. , Shundrin Leonid A. , Dmitriev Alexey A. , Irtegova Irina G. , Bagryanskaya Irina Yu. , Shundrina Inna K. , Gritsan Nina P. , Beckmann Jens , Zibarev Andrey V.
Published: December 2019

Near-IR dyes of a new type featuring multiple tuneable redox states (dia- and paramagnetic, neutral and positively and negatively charged) are synthesized by previously unknown self-condensation of Herz diradical.
Exploiting kinetics for assembly of multicomponent nanoparticle networks with programmable control of heterogeneity
Authors: Davis Jessica L. , Silva Karunamuni L. , Brock Stephanie L.
Published: December 2019

Mixing in two-component metal-chalcogenide nanocrystal gels and aerogels is dictated by the chain-length of surface capping ligands.
Crystal structure evolution of the high energetic compound carbonic dihydrazidinium bis[3-(5-nitroimino-1,2,4-triazolate)] induced by solvents
Authors: Ren Jianrong , Chen Dong , Liu Guangrui , Wang Kangcai , Fan Guijuan , Yu Yanwu , Zhang Chaoyang , Li Hongzhen
Published: December 2019

Four new solid forms of CBNT including CBNT·2H2O, H2BNT·2DMSO, H2BNT·2H2O and [NH2(CH3)2+]2[BNT2−]·2H2O were successfully obtained from water, DMSO, BL/H2O and DMF/H2O through a solvent induction method.
Using a continuous flow reactor for aqueous lateral epitaxial overgrowth of low-dislocation-density ZnO layers on honeycomb-patterned structures
Authors: Chen Hou-Guang , Wang Huei-Sen , Yang Shu-Han , Lin Xuan-Chen
Published: December 2019

A new type of continuous flow reactor was used for long-duration lateral epitaxial overgrowth of low-dislocation-density ZnO layers.
Supramolecular synthesis with N-hetero-tolanes: liquid crystals and hydrogen-bonded and halogen-bonded co-crystals
Authors: Flores Linda , López Duarte Ismael , Gómez-Lor Berta , Gutierrez-Puebla Enrique , Hennrich Gunther
Published: December 2019

Supramolecular, crystalline aggregates are obtained from EO-active N-hetero-tolanes by protonation or halogen bonding.
Study on the crack phenomenon of heavy FeS-doped Ib diamond crystals with {111} surface as growth surface in Fe–Ni–C system
Authors: Fang Shuai , Ma Hongan , Cai Zheng Hao , Wang Chun Xiao , Fang Chao , Zhao Zhan Dong , Lu Zhi Yun , Wang Yong Kui , Chen Liangchao , Jia XiaoPeng
Published: December 2019

Herein, the characteristics of heavy FeS-doped diamond crystals were studied using a China-type large volume cubic high-pressure apparatus (CHPA) with FeNi alloy as the catalyst at 6.0–6.5 GPa and 1350–1400 °C.
Assembly strategies of organic-based imaging agents for fluorescence and photoacoustic bioimaging applications
Authors: Cheng Hong-Bo , Li Yuanyuan , Tang Ben Zhong , Yoon Juyoung
Published: December 2019

The results of numerous studies have led to the development of assembled organic substances for fluorescence and photoacoustic bioimaging as part of comprehensive approaches to the diagnosis of diseases.
Novel nickel nanoparticles stabilized by imidazolium-amidinate ligands for selective hydrogenation of alkynes
Authors: López-Vinasco Angela M. , Martínez-Prieto Luis M. , Asensio Juan M. , Lecante Pierre , Chaudret Bruno , Cámpora Juan , van Leeuwen Piet W. N. M.
Published: December 2019

Novel magnetically recoverable nickel nanoparticles (Ni NPs) stabilized by imidazolium-amidinate ligands selectively hydrogenate alkynes into (Z)-alkenes under mild conditions.
Filling the void: controlled donor–acceptor interaction facilitates the formation of an M–M single bond in the zero oxidation state of M (M = Zn, Cd, Hg)
Authors: Saha Ranajit , Pan Sudip , Chattaraj Pratim K. , Merino Gabriel
Published: December 2019

We present viable M2(NHBMe)2 (M = Zn, Cd, Hg; NHBMe = (HCNMe)2B) complexes where the controlled donor-acceptor interaction leads to M0–M0 single bond.
Influence of an internal standard in axial ICP OES analysis of trace elements in plant materials
Authors: Drava Giuliana , Minganti Vincenzo
Published: December 2019

Further insight into the use of an internal standard in ICP OES is provided aiming to improve the measurement quality.
Detection of microplastics using inductively coupled plasma-mass spectrometry (ICP-MS) operated in single-event mode
Authors: Bolea-Fernandez Eduardo , Rua-Ibarz Ana , Velimirovic Milica , Tirez Kristof , Vanhaecke Frank
Published: December 2019

The occurrence of microplastics (MPs) in the environment is a matter of increasing concern. In this work, it has been shown for the first time that ICP-MS operated in single-event mode can be used for the characterization of MPs relying on their C content.
Sensitive tear screening of diabetic retinopathy with dual biomarkers enabled using a rapid electrokinetic patterning platform
Authors: Wang Jen-Yi , Kwon Jae-Sung , Hsu Sheng-Min , Chuang Han-Sheng
Published: December 2019

A screening technique with dual biomarkers for diabetic retinopathy (DR) based on optoelectrokinetics was presented. Our technique will revolutionize the diagnostic method for DR and enable an early treatment to improve patients' quality of life.
Visible cellular distribution of cadmium and zinc in the hyperaccumulator Arabidopsis halleri ssp. gemmifera determined by 2-D X-ray fluorescence imaging using high-energy synchrotron radiation
Authors: Fukuda Naoki , Kitajima Nobuyuki , Terada Yasuko , Abe Tomoko , Nakai Izumi , Hokura Akiko
Published: December 2019

The striking sub-cellular distribution of cadmium (Cd) and zinc (Zn) in the Cd and Zn hyperaccumulator Arabidopsis halleri ssp. gemmifera was revealed by microbeam X-ray microfluorescence analysis (μ-XRF) using high-energy synchrotron radiation. Plants were grown in hydroponics with various Cd and Zn concentrations. The concentration of Cd in the aerial portions of the plants increased with increasing Zn exposure and the transportation efficiency of Cd from the root to the shoot was affected by both the Cd and Zn concentrations in the nutrient solution. The μ-XRF imaging clearly showed that Cd and Zn were preferentially accumulated in trichomes on the leaf, while the distribution of Cd in the leaf was changed by Zn treatment. It was observed that Cd treated with a higher Zn concentration (20 μM Cd + 100 μM Zn) was distributed in the mesophyll tissue at high concentrations. In addition, μ-XRF imaging clarified that the distribution of Zn inside the leaf was different from that of Cd at a cellular level. Zn was primarily distributed in the mesophyll tissue of the leaf blade. In contrast, Cd was localized in the vascular bundle of the main vein. That is, Zn was transported to mesophyll tissue from the vascular bundle more efficiently than Cd. As seen above, we were able to study the difference of the distribution of Cd and Zn, which are congeners and behave similarly, inside the plant body at the cellular level in detail by high-energy μ-XRF.
High throughput study on magnetic ground states with Hubbard U corrections in transition metal dihalide monolayers
Authors: Li Xinru , Zhang Zeying , Zhang Hongbin
Published: December 2019

We present a high throughput study of the magnetic ground states for 90 transition metal dihalide monolayers TMX2 using density functional theory based on a collection of Hubbard U values.
A multiple mode integrated biosensor based on higher order Fano metamaterials
Authors: Yan Xin , Zhang Zhang , Liang Lanju , Yang Maosheng , Wei Dequan , Song Xiaoxian , Zhang Haiting , Lu Yuying , Liu Longhai , Zhang Mengjin , Wang Tao , Yao Jianquan
Published: December 2019

A multiple mode integrated biosensor based on higher order Fano metamaterials (FRMMs) is proposed.
Design, synthesis, and evaluation of azo D–π-A dyes as photothermal agents
Authors: Fuse Shinichiro , Oishi Tsukasa , Matsumura Keisuke , Hayashi Yoshihiro , Kawauchi Susumu , Nakamura Hiroyuki
Published: December 2019

Thirteen readily accessible azo D–π-A dyes, intended for use as photothermal agents, were synthesized using only a few steps.
Anchoring nanosized Pd on three-dimensional boron- and nitrogen-codoped graphene aerogels as a highly active multifunctional electrocatalyst for formic acid and methanol oxidation reactions
Authors: Yang Ying , Huang Huajie , Shen Binfeng , Jin Ling , Jiang Quanguo , Yang Lu , He Haiyan
Published: December 2019

A facile and scalable strategy is developed for the preparation of nanosized Pd crystals anchored on 3D B- and N-codoped graphene aerogels, which show multifunctional electrocatalytic ability.
Nitric oxide diffusion through cystic fibrosis-relevant media and lung tissue
Authors: Hall Jackson R. , Maloney Sara E. , Jin Haibao , Taylor James B. , Schoenfisch Mark H.
Published: December 2019

Nitric oxide diffusion monitored through artificial sputum medium using an adaptable diffusion cell and released from donor through human lung tissue.
Multiplex detection of miRNAs based on aggregation-induced emission luminogen encoded microspheres
Authors: Zou Dan , Wu Weijie , Zhang Jingpu , Ma Qiang , Fan Sisi , Cheng Jin , Li Dan , Niu Jiaqi , Qian Xiaoqing , Li Wanwan , Cui Daxiang
Published: December 2019

A miRNA multiplex detection assay based on aggregation-induced emission luminogen encoded microspheres.
Theoretical investigation of the vertical dielectric screening dependence on defects for few-layered van der Waals materials
Authors: Singh Amit , Lee Seunghan , Bae Hyeonhu , Koo Jahyun , Yang Li , Lee Hoonkyung
Published: December 2019

First-principle calculations were employed to analyze the effects induced by vacancies of molybdenum (Mo) and sulfur (S) on the dielectric properties of few-layered MoS2.
Effects of cooling rate on structural relaxation in amorphous drugs: elastically collective nonlinear langevin equation theory and machine learning study
Authors: Phan Anh D. , Wakabayashi Katsunori , Paluch Marian , Lam Vu D.
Published: December 2019

Theoretical approaches are formulated to investigate the molecular mobility under various cooling rates of amorphous drugs.
Three-dimensionally printed pressure sensor arrays from hysteresis-less stretchable piezoresistive composites
Authors: Kang Jong Hyun , Kim Ju Young , Jo Yejin , Kim Hyun-Suk , Jung Sung Mook , Lee Su Yeon , Choi Youngmin , Jeong Sunho
Published: December 2019

The pressure sensor array device was fabricated by the 3D multi-stacked printing technique using highly reversible composite materials comprising a non-ionic amphiphilic surfactant.
Effects of Ag0-modification and Fe3+-doping on the structural, optical and photocatalytic properties of TiO2
Authors: Zhu Xiaodong , Xu Hongyan , Yao Yin , Liu Hui , Wang Juan , Pu Yun , Feng Wei , Chen Shanhua
Published: December 2019

The reasons for the photocatalytic activity of 1% Ag–TiO2 > pure TiO2 > 1% Ag/1% FeTiO2 > 1% Fe–TiO2 are investigated systematically.
Student assumptions and mental models encountered in IR spectroscopy instruction
Authors: Wright Lyniesha Chanell , Oliver-Hoyo Maria Theresa
Published: December 2019

The mental models students have after engaging in an activity designed to teach infrared (IR) spectroscopy without reliance on IR absorption tables, were characterized. Qualitative analysis of semi-structured interviews, through open coding, allowed the classification of the mental models as Molecules as Dynamic (MAD), Bonds as Dynamic (BAD), Molecules as Static (MAS), External Energy (EE), and Internal Energy (IE). Assumptions students have about structure, dynamics, and spectra when solving IR spectra were identified and grouped as intuitive, valid, and spurious. A connection was found between participants with more sophisticated mental models and those who used multi-variate reasoning. Participants were also more likely to be successful when they compared spectra. The results of the analysis suggest IR spectroscopy should be taught through a conceptual lens to guide learning about the interaction of energy and matter.
Magnetowetting dynamics of sessile ferrofluid drops on soft surfaces
Authors: Sarma Bhaskarjyoti , Shahapure Vijay , Dalal Amaresh , Basu Dipankar N.
Published: December 2019

Substrate compliance mediated magnetowetting dynamics of ferrofluid droplets on soft PDMS surfaces.
Na2.3Cu1.1Mn2O7−δ nanoflakes as enhanced cathode materials for high-energy sodium-ion batteries achieved by a rapid pyrosynthesis approach
Authors: Soundharrajan Vaiyapuri , Sambandam Balaji , Alfaruqi Muhammad H. , Kim Sungjin , Jo Jeonggeun , Kim Seokhun , Mathew Vinod , Sun Yang-kook , Kim Jaekook
Published: December 2019

Na2.3Cu1.1Mn2O7−δ nanoflakes prepared by an ultrafast pyrosynthesis approach are used as the positive electrode for SIBs. In situ GITT and XRD results support the occurrence of a single-phase reaction in the Na2.3Cu1.1Mn2O7−δ nanoflakes cathode during Na+ (de)intercalation.
Application of a new π-conjugated ladder-like polymer in enhancing the stability and efficiency of perovskite solar cells
Authors: Yu Bingcheng , Zhang Liren , Wu Jionghua , Liu Kuan , Wu Huijue , Shi Jiangjian , Luo Yanhong , Li Dongmei , Bo Zhishan , Meng Qingbo
Published: December 2019

21.5% conversion efficiency of organic–inorganic perovskite solar cells has been achieved by using a π-conjugated ladder-like polymer as an additive.
Ambient blade coating of mixed cation, mixed halide perovskites without dripping: in situ investigation and highly efficient solar cells
Authors: Tang Ming-Chun , Fan Yuanyuan , Barrit Dounya , Chang Xiaoming , Dang Hoang X. , Li Ruipeng , Wang Kai , Smilgies Detlef-M. , Liu Shengzhong (Frank) , De Wolf Stefaan , Anthopoulos Thomas D. , Zhao Kui , Amassian Aram
Published: December 2019

Blade coating of mixed cation, mixed halide perovskite films is investigated using in situ X-ray scattering to investigate the role of formulations and processing routes and eliminate the need for anti-solvent dripping.
Spermine amides of selected triterpenoid acids: dynamic supramolecular system formation influences the cytotoxicity of the drugs
Authors: Bildziukevich Uladzimir , Malík Matěj , Özdemir Zulal , Rárová Lucie , Janovská Lucie , Šlouf Miroslav , Šaman David , Šarek Jan , Nonappa Nonappa , Wimmer Zdeněk
Published: December 2019

Cytotoxicity data: 8a: IC50 [μM]: 18.8/31.8/32.6/17.2 (25.1 ± 8.2), due to the dynamic self-assembly found, low-contrast networks (TEM); 8b: IC50 [μM]: 7.5 ± 1.6, dynamic self-assembly not detected, partly helical structures (TEM).
Retracted Article: A self-assembled supramolecular natural product gel from liquidambaric acid in traditional Chinese medicine with inherent anti-inflammatory activity for drug delivery
Authors: Zhi Kangkang , Wang Jiacheng
Published: December 2019

A supramolecular self-assembled natural product gel from liquidambaric acid in traditional Chinese medicine with inherent anti-inflammatory activity for drug delivery was constructed.
From upconversion to thermal radiation: spectroscopic properties of a submicron Y2O3:Er3+,Yb3+ ceramic under IR excitation in an extremely broad temperature range
Authors: Łukaszewicz Mikołaj , Tomala Robert , Lisiecki Radosław
Published: December 2019

Along with the ongoing developments in the field of luminescence thermometry, especially concerning ratiometric methods, opportunity presents itself to broaden the scope of their application potential.
PD-L1 regulates tumorigenesis and autophagy of ovarian cancer by activating mTORC signaling
Authors: Gao Hongmin , Zhang Juan , Ren Xiaohong
Published: December 2019

PD-L1 is a well-known immune co-stimulatory molecule that regulates tumour cell escape from immunity by suppressing the immune response. However, the clinical significance of PD-L1 in the progression of ovarian cancer is unclear. Our study demonstrated that PD-L1 is up-regulated in ovarian tumour tissue compared with its expression level in adjacent normal tissue. Furthermore, we confirmed that PD-L1 increases the proliferation of cancer cells by activating the AKT-mTORC signalling pathway, which is also enhanced by the expression of S6K, the substrate of mTORC. In addition, PD-L1 promotes the autophagy of ovarian cancer cells by up-regulating the expression of BECN1, a crucial molecule involved in the regulation of autophagy. In conclusion, PD-L1 may provide a target for the development of a novel strategy for the treatment of ovarian cancer.
Adaptive LMBP training‐based icosϕ control technique for DSTATCOM
Authors: Mangaraj Mrutyunjaya , Panda Anup Kumar , Penthia Trilochan , Dash Asish Ranjan
Published: December 2019

In this study, the design and implementation of a new hybrid soft computing control technique called Levenberg–Marquardt backpropagation (LMBP)‐based icosϕ is proposed. Two different compensation techniques are evaluated for the performance analysis of three‐phase three‐wire (3P3W) voltage source converter (VSC)‐based DSTATCOM. The first one is the conventional icosϕ control technique whereas the other one is called the LMBP‐based icosϕ control technique. The better power quality of the system is obtained using the proposed control algorithm by maintaining a less voltage across the capacitor as compared to the conventional one. So, the reduction in the size of the DSTATCOM is realised by the LMBP‐based control algorithm. Furthermore, the performance parameters such as load balancing, harmonics elimination, power factor improvement, and voltage regulation are evaluated under both balanced and unbalanced loading conditions as per the IEEE guidelines. The effectiveness of the proposed controller is studied in the MATLAB/Simulink environment and also validated with a low power rated prototype experimental results.
Distributed finite‐time information discovery‐based secondary restoration for islanded microgrids
Authors: Shrivastava Sonam , Subudhi Bidyadhar
Published: December 2019

A new finite‐time secondary voltage and frequency restoration scheme for an islanded microgrid (MG) is proposed in this study. All distributed generators (DGs) do not have access to the voltage and frequency reference value which makes their control more challenging. Therefore, a finite‐time Information Discovery Scheme (IDS) is incorporated into the distributed secondary control scheme. The IDS provides local estimates of the global references of voltage and frequency for DGs in finite‐time, and distributed control scheme uses this information to restore the voltage and frequency of MG to their reference values while accurately sharing the active power among the DGs in finite‐time. The proposed control scheme is implemented on a sparse communication network and obviates the need for a central controller thereby reducing the risk of single‐point‐failure. The proof for finite‐time restoration and restoration time upper‐bound are derived using Lyapunov theory. The effectiveness of the proposed control scheme is verified through simulation of an MG test system in MATLAB/SimPowerSystem environment for sudden load variation and time‐varying communication topology. The proposed control scheme supports plug and play capability and exhibits better convergence performance and disturbance rejection than the asymptotic controller based on neighbourhood tracking error.
Optimal sizing and multi‐energy management strategy for PV‐biofuel‐based off‐grid systems
Authors: V Arun Kumar , Sharma Sumedha , Verma Ashu
Published: December 2019

This study proposes a comprehensive framework for developing a multi‐energy off‐grid microgrid with the decoupled flow of thermal and electrical energies in a rural setting. A carbon‐neutral microgrid with a hybrid generation system constituting a photovoltaic unit and a biofuel generator is proposed. In order to enhance the fuel utilisation efficiency, the biofuel generator is operated in combined cooling, heating, and power mode, and the recovered thermal energy forms the heat distribution network in the microgrid. The flexibility of system operation is improved by suitable multi‐energy (electrical and thermal) storage. Firstly, an optimal sizing framework has been developed for the system as a mixed integer linear programming model. Secondly, a coordinated multi‐energy management system (MEMS) has been developed for combined optimal dispatch of multiple generation and storage resources. The MEMS has been developed as a mixed integer non‐linear programming model, which minimises system operational cost while considering minimum battery degradation to prolong its lifetime. Finally, a detailed economic analysis of the proposed system has been presented, highlighting the levellised cost of energy and net present value. Extensive case studies and simulation results depict the effectiveness and suitability of the proposed MEMS for the rural off‐grid microgrid.
Study on online monitoring wear debris sensor of wind turbine gearbox
Authors: Zhang Xiangqi , Xu Xiaoli , Zuo Yunbo , Gu Yuhai
Published: December 2019

Lubrication is one of the critical factors for the normal operation of wind turbine's gearbox, which carries abundant and various wear debris. Accordingly, these debris reflects the running state of the equipment and forecasts the early fault of wind turbine gearbox effectively. Thus, the authors can achieve predictive maintenance, even avoid the occurrence of safety accidents. In order to realise real‐time online monitoring of lubrication, this article studied the principle of wear debris detection sensor, constructed approximate mathematical model of inductive wearing debris sensor, produced a prototype device, and carried out the monitoring test of metal wearing debris without oil. Experiment shown that the designed sensor can detect the signal of metal wear debris with the smallest diameter to 80μm, which can diagnose the early fault of the wind turbine.
State assessment of protective devices based on data of information processing system
Authors: Ye Yuanbo , Xie Min , Wang Jiaqi , Xu Yan , Xu Dianyang
Published: December 2019

At present, the evaluation of relay status maintenance depends on a large amount of manpower. However, the data sources of relay protection devices and fault recorder information system (as known as the information processing system) have reached the basic requirements of online prediction of status evaluation of protection devices. Taking the exported information as the data source, according to the configuration file information, the state‐space information that can be monitored by the protection device can be automatically extracted, and then the automatic extraction of the historical state of the protection device and the calculation of the coefficient of the state‐transfer matrix are completed. Using Markov state space model method, the probability of each state that can be monitored by protection device was calculated, and the state of protection is evaluated. Finally, the operation data of CSC‐101B protection device are selected as an example. The correctness and effectiveness of the method for evaluating the state of the protective device are verified.
Evolution of the Alfvén Mach number associated with a coronal mass ejection shock
Authors: Maguire Ciara A. , Carley Eoin P. , McCauley Joseph , Gallagher Peter T.
Published: December 2019

The Sun regularly produces large-scale eruptive events, such as coronal mass ejections (CMEs) that can drive shock waves through the solar corona. Such shocks can result in electron acceleration and subsequent radio emission in the form of a type II radio burst. However, the early-phase evolution of shock properties and its relationship to type II burst evolution is still subject to investigation. Here we study the evolution of a CME-driven shock by comparing three commonly used methods of calculating the Alfvén Mach number (MA), namely: shock geometry, a comparison of CME speed to a model of the coronal Alfvén speed, and the type II band-splitting method. We applied the three methods to the 2017 September 2 event, focusing on the shock wave observed in extreme ultraviolet by the Solar Ultraviolet Imager on board GOES-16, in white-light by the Large Angle and Spectrometric Coronagraph on board SOHO, and the type II radio burst observed by the Irish Low Frequency Array. We show that the three different methods of estimating shock MA yield consistent results and provide a means of relating shock property evolution to the type II emission duration. The type II radio emission emerged from near the nose of the CME when MA was in the range 1.4–2.4 at a heliocentric distance of ∼1.6 R⊙. The emission ceased when the CME nose reached ∼2.4 R⊙, despite an increasing Alfvén Mach number (up to 4). We suggest the radio emission cessation is due to the lack of quasi-perpendicular geometry at this altitude, which inhibits efficient electron acceleration and subsequent radio emission.
Differences in radio emission from similar M dwarfs in the binary system Ross 867-8
Authors: Quiroga-Nuñez L. H. , Intema H. T. , Callingham J. R. , Villadsen J. , van Langevelde H. J. , Jagannathan P. , Shimwell T. W. , Boven E. P.
Published: December 2019

Serendipitously, we rediscovered radio emission from the binary system Ross 867 (M4.5V) and Ross 868 (M3.5V) while inspecting archival Giant Metrewave Radio Telescope (GMRT) observations. The binary system consists of two M-dwarf stars that share common characteristics such as spectral type, astrometric parameters, age, and emission at infrared, optical, and X-ray frequencies. The GMRT data at 610 MHz taken on July 2011 shows that the radio emission from Ross 867 is polarized and highly variable on hour timescales with a peak flux of 10.4 ± 0.7 mJy beam−1. Additionally, after reviewing archival data from several observatories (VLA, GMRT, JVLA, and LOFAR), we confirm that although the two stars are likely coeval, only Ross 867 was detected, while Ross 868 remains undetected at radio wavelengths. As the stars have a large orbital separation, this binary stellar system provides a coeval laboratory to examine and constrain the stellar properties linked to radio activity in M dwarfs. We speculate that the observed difference in radio activity between the dwarfs could be due to vastly different magnetic field topologies or that Ross 867 has an intrinsically different dynamo.
Road rehabilitation as an opportunity to analyse the approach in designing pavement constructions
Authors: Erjavec Slavoljub , Ognjenovic Slobodan , Zafirovski Zlatko
Published: December 2019

The pavement constructions of highways built in he eighties mainly featured low bearing surfaces with cement stabilization and asphalt layers with the total thickness of up to 26 cm. The nineties were a period of rationalization, mainly referring to the reduction of the asphalt layer thickness. This paper will compare the two approaches upon the designing of pavement constructions in Serbia and in Macedonia. The paper presents subjects dealing with issues like the choice between the “long-term“ or “rationalized” pavement construction as well as with problems in the evaluation of layers of non-cohesive granulated material or the layer of cement-connected stone material. Contrary to this, the present paper does not deal with questions related to numerous diagnostic methods applied in the assessment of the pavement conditions, which is otherwise a rather important segment in the process of road rehabilitation design.
Joint control actions on electromechanical devices in ergatic systems
Authors: Saushev Alexandr , Tyrva Vladimir , Kovtun Lev
Published: December 2019

The problem of implementing joint control actions on electromechanical devices (EMD) in human-machine systems through the control body of a human-machine interface is considered. Based on the theory of optimal control, control functions between the human operator, the program control automaton, and the corrective control automaton are synthesized. Peculiarities of the technical implementation of the control actions on the EMD of the ergatic system using the new type of joint control devices have been identified, through the control body of which information interaction between the human operator and the system automa-ton is carried out. Based on the model of actions and responses of the human operator and machine, which is adopted in engineering psychology, mathematical models of their joint control of the object have been developed. Mathematical models of machine responses are constructed using the hypothesis of complete certainty in the form of a normal system of ordinary differen-tial equations. As a result of combining action and response models for the human-machine system, a finite set of incomplete representations of the elementary motions of the image point in the state space is obtained, on which the programmed motion of the object is built in the form of a sequence of elementary motions. Virtual discrete control signals Corresponding to specific positions of the control bodies of the joint control apparatuses of the human-machine interface of the system are determined, through which consecutive transitions from one elementary movement to another are carried out. The conclusions on the effectiveness of the use of joint control in transport ergatic human-machine systems are formulated. It is shown that in this case, the advantages of control partners are used and combined to the greatest extent.
System of quality indicators and the methodology of evaluation of the housing and communal service of the population
Authors: Derbasova Evgeniya , Bialeckaia Elena , Mukanov Ruslan , Svintsov Vladimir
Published: December 2019

Developed a set-theoretic model of the problem of assessing the quality of housing and communal services population, which allows to determine the necessary components and characteristics involved in the formulation of the problem, forming the input data. For resolving the problem of redundancy of indicators to assess the quality of a procedure was developed to identify a minimum set of indicators. A procedure of the analysis of cognitive maps, including recommendations on elimination of redundant indicators.
On the issue of expanding the base of mineral and complex additives for cement concrete
Authors: Tarakanov Oleg , Belyakova Elena , Yurova Varvara
Published: December 2019

Modern materials science is characterized not only by the creation of high-strength building materials, but also by using a large number of raw materials and additives that improve the properties of concrete mixtures and concrete. The article considers the possibility of using both old and new generations of complex organomineral additives in concrete production. The nature of the effect of additives on the rheological behavior of cement systems and hydrate formation processes, as well as an assessment of the effect of mineral and organic additives on the composition of hydration products of cement systems, are revealed. Studies have shown that complex additives, which include hyper- and superplasticizers, lead to some slowdown in hydration and crystallization processes. The high efficiency of plasticizing additives helps to reduce water content, which in turn provides increased strength of cement concrete.
Analysis of diagnostic methods and functional state monitoring of power oil transformers in electrical substations
Authors: Lankin Anton , Baklanov Alexey , Lankin Igor
Published: December 2019

In this paper, we analyze the methods of diagnosis and control the functional state of power oil transformers in electrical substations. Oil transformers are the most efficient converters of electrical energy, which is reflected in a higher efficiency in comparison with dry transformers. Oil transformers are designed to work with power grids in large industrial complexes where energy conversion is required to protect equipment from sudden voltage surges. The high loads associated with this work require timely diagnosis and maintenance of transformers. The article discusses the most commonly used methods for diagnosing deviations of the technical parameters of electrical substations in the process of their operation. The authors proposed a method of impedance series-parallel identification, which allows not only to determine the equivalent circuit of the power oil transformer, but also to diagnose possible malfunctions. Functional circuits of the device for impedance series-parallel identification of faults in power oil transformers have been developed.
The impact of energy-saving measures on the environment
Authors: Giyasov Botir
Published: December 2019

The Earth’s biosphere has recently been increasingly exposed to pollution sources. The economic growth of the leading countries of the world contributes to the active development of artificial sources of pollution of the environment, which are formed due to the rapid economic activity of man. Human impact on the ecosystem is manifested as a result of the rapid development of urban space and transport infrastructure, as well as active energy consumption. The development of high-rise buildings of dense development in modern cities creates an unfavorable environmental situation in the residential zone. In densely built-up areas of the city, an industrial environment is formed. As a result of this, in a residential urban environment subject to the influence of anthropogenic factors, the natural heat-wind and air exchange conditions are changing. Using the buildings of the Moscow International Business Center Moscow-City as an example, the paper analyzes the causes of the concentration of harmful emissions in yard spaces and streets as a result of active energy consumption. A deep analysis of the influence of natural and artificial sources of pollution on the living environment is carried out. Energy consumption is identified as the cause of artificial pollution sources. The role of urban transport in the deterioration of the environmental situation of a modern city is assessed.