bluuebunny/crossref_metadata_2025 huggingface dataset:
PlantPepDB: A manually curated plant peptide database
Authors: Das Durdam , Jaiswal Mohini , Khan Fatima Nazish , Ahamad Shahzaib , Kumar Shailesh
Published: February 2020

Plants produce an array of peptides as part of their innate defense mechanism against pathogens. The potential use of these peptides for various therapeutic purposes is increasing per diem. In order to excel in this research, the community requires web repositories that provide reliable and accurate information about these phyto-peptides. This work is an attempt to bridge the gaps in plant-based peptide research. PlantPepDB is a manually curated database that consists of 3848 plant-derived peptides among which 2821 are experimentally validated at the protein level, 458 have experimental evidence at the transcript level, 530 are predicted and only 39 peptides are inferred from homology. Incorporation of physicochemical properties and tertiary structure into PlantPepDB will help the users to study the therapeutic potential of a peptide, thus, debuts as a powerful resource for therapeutic research. Different options like Simple, Advanced, PhysicoChem and AA composition search along with browsing utilities are provided in the database for the users to execute dynamic search and retrieve the desired data. Interestingly, many peptides that were considered to possess only a single property were found to exhibit multiple properties after careful curation and merging the duplicate data that was collected from published literature and already available databases. Overall, PlantPepDB is the first database comprising detailed analysis and comprehensive information of phyto-peptides from a broad functional range which will be useful for peptide-based applied research. PlantPepDB is freely available at http://www.nipgr.ac.in/PlantPepDB/.
Suggested Case of Langerhans Cell Histiocytosis in a Cretaceous dinosaur
Authors: Rothschild Bruce M. , Tanke Darren , Rühli Frank , Pokhojaev Ariel , May Hila
Published: February 2020

Susceptibility to diseases is common to humans and dinosaurs. Since much of the biological history of every living creature is shaped by its diseases, recognizing them in fossilized bone can furnish us with important information on dinosaurs’ physiology and anatomy, as well as on their daily activities and surrounding environment. In the present study, we examined the vertebrae of two humans from skeletal collections with Langerhans Cell Histiocytosis (LCH), a benign osteolytic tumor-like disorder involving mainly the skeleton; they were diagnosed in life, along with two hadrosaur vertebrae with an apparent lesion. Macroscopic and microscopic analyses of the hadrosaur vertebrae were compared to human LCH and to other pathologies observed via an extensive pathological survey of a human skeletal collection, as well as a three-dimensional reconstruction of the lesion and its associated blood vessels from a µCT scan. The hadrosaur pathology findings were indistinguishable from those of humans with LCH, supporting that diagnosis. This report suggests that hadrosaurids had suffered from larger variety of pathologies than previously reported. Furthermore, it seems that LCH may be independent of phylogeny.
Exploring the familial role of social responsiveness differences between savant and non-savant children with autism
Authors: Daniel Edan , Menashe Idan
Published: February 2020

Savant syndrome is a phenomenon whereby individuals with cognitive impairments have one or more outstanding abilities, inconsistent with their general intellectual functioning. Approximately 50% of savant individuals have autism spectrum disorder (ASD), and 10–30% of people with ASD have savant skills. To shed additional light on this considerable overlap, we compared autistic traits as measured by the Social-Responsiveness-Scale (SRS) between 712 children with at least one reported savant skill, as determined by designated questions from the ADI-R questionnaire (savant group), and 2,032 non-savant children from the Simons-Simplex-Collection (SSC) database. We also examined SRS scores of the parents of these children and compared parent-child differences in SRS scores between the savant and non-savant groups. Savant children had significantly lower SRS scores (less deficiencies) compared to non-savant children (P < 0.05), while no such differences were observed among their parents. Further intra-familial analyses revealed weak pairwise-correlations (r = −0.015–0.141) between SRS scores of parents and their children, and significantly larger parent-child differences in standardized SRS scores within savant families (P < 0.05). These findings suggest that the less severe autistic traits among savant children with ASD compared to other people with ASD is not likely to be a familial trait.
Physicochemical characterization of Pseudomonas stutzeri UFV5 and analysis of its transcriptome under heterotrophic nitrification/aerobic denitrification pathway induction condition
Authors: Silva Lívia Carneiro Fidélis , Lima Helena Santiago , Mendes Tiago Antônio de Oliveira , Sartoratto Adilson , Sousa Maira Paula , de Souza Rodrigo Suhett , de Paula Sérgio Oliveira , de Oliveira Valéria Maia , Silva Cynthia Canedo
Published: February 2020

Biological ammonium removal via heterotrophic nitrification/aerobic denitrification (HN/AD) presents several advantages in relation to conventional removal processes, but little is known about the microorganisms and metabolic pathways involved in this process. In this study, Pseudomonas stutzeri UFV5 was isolated from an activated sludge sample from oil wastewater treatment station and its ammonium removal via HN/AD was investigated by physicochemical and molecular approaches to better understand this process and optimize the biological ammonium removal in wastewater treatment plants. Results showed that P. stutzeri UFV5 removed all the ammonium in 48–72 hours using pyruvate, acetate, citrate or sodium succinate as carbon sources, C/N ratios 6, 8, 10 and 12, 3–6% salinities, pH 7–9 and temperatures of 20–40 °C. Comparative genomics and PCR revealed that genes encoding the enzymes involved in anaerobic denitrification process are present in P. stutzeri genome, but no gene that encodes enzymes involved in autotrophic nitrification was found. Furthermore, transcriptomics showed that none of the known enzymes of autotrophic nitrification and anaerobic denitrification had their expression differentiated and an upregulation of the biosynthesis machinery and protein translation was observed, besides several genes with unknown function, indicating a non-conventional mechanism involved in HN/AD process.
Sperm enrichment from poor semen samples by double density gradient centrifugation in combination with swim-up for IVF cycles
Authors: Dai Xiuliang , Wang Yufeng , Cao Fang , Yu Chunmei , Gao Tingting , Xia Xiyang , Wu Jun , Chen Li
Published: February 2020

Sperm preparation in IVF cycles using density gradient centrifugation (DGC) in combination with swim-up (SU) has been widely adopted in reproductive centres worldwide. It is a fact that the sperm recovery rate following one DGC from poor semen samples (showing liquefaction defects/containing too many unresolvable clots or rare sperm) is relatively low. Our results showed that double DGC (DDGC) is effective at increasing the sperm recovery rate from poor semen samples. However, DDGC may increase the mechanical stress of sperm, thereby potentially impairing embryo development. Therefore, it is necessary to evaluate the safety of using sperm prepared by DDGC/SU for IVF cycles. In this study, we retrospectively analysed the data generated from a total of 529 IVF cycles (from June 2017 to June 2018), and these IVF cycles contributed 622 transfer cycles (from June 2017 to December 2018) in Changzhou Maternal and Child Health Care Hospital. Of them, 306 IVF cycles and the related 355 transfer cycles (normal semen samples prepared by DGC/SU) were set as the normal group, while 223 IVF cycles and the related 267 transfer cycles (poor semen prepared by DDGC/SU) were set as the observation group. The main outcome measures, including the normal fertilization rate, top D3 embryo formation rate, blastocyte formation rate, clinical pregnancy rate and live birth rate, birth weight and duration of pregnancy, were compared between the two groups. Compared to semen in the DGC/SU group, semen in the DDGC/SU group showed increased levels of the DNA fragmentation index (DFI) and reduced sperm concentration, percentage of progressive motility (PR) sperm, and percentage of normal morphology sperm. The indicators reflecting in vitro embryo development and clinical outcomes were similar in the DGC/SU group and DDGC/SU group, including the normal fertilization rate, top D3 embryo formation rate, blastocyte formation rate, pregnancy rate, implantation rate, spontaneous abortion rate, live birth rate, birth weight and duration of pregnancy. Furthermore, we found that the 1PN zygote formation rate was significantly lower in the DDGC/SU group than that in the DGC/SU group. We concluded that oocytes fertilized by sperm from poor semen samples separated by DDGC/SU achieved the same outcomes as oocytes fertilized by sperm from normal semen separated by DGC/SU, suggesting that DDGC/SU is an effective and safe method of sperm enrichment for poor semen samples in IVF. The main contribution of the present study is the verification of the effectiveness of DDGC/SU in improving sperm recovery from poor semen samples and the safety of using sperm prepared by DDGC/SU for IVF.
Enhanced electron transfer and photocatalytic hydrogen production over the carbon nitride/porphyrin nanohybrid finely bridged by special copper
Authors: Zhang Meiqi , Zhu Kun , Qin Lixia , Kang Shi-Zhao , Li Xiangqing
Published: February 2020

A graphitic carbon nitride/tetrakis-(4-hydroxyphenyl)porphyrin nanohybrid smartly fabricated with special Cu showed excellent photocatalytic hydrogen evolution performance.
Lactoferrin-based nanoemulsions to improve the physical and chemical stability of omega-3 fatty acids
Authors: Nunes Rafaela , Pereira Beatriz D'Avó , Cerqueira Miguel A. , Silva Pedro , Pastrana Lorenzo M. , Vicente António A. , Martins Joana T. , Bourbon Ana I.
Published: February 2020

Omega-3 (ω-3) polyunsaturated fatty acids are highly susceptible to oxidation and have an intense odour and poor water solubility, which make their direct applications in foods extremely difficult.
Dye-doped biodegradable nanoparticle SiO2 coating on zinc- and iron-oxide nanoparticles to improve biocompatibility and for in vivo imaging studies
Authors: Navarro-Palomares Elena , González-Saiz Paula , Renero-Lecuna Carlos , Martín-Rodríguez Rosa , Aguado Fernando , González-Alonso David , Fernández Barquín Luis , González Jesús , Bañobre-López Manuel , Fanarraga Mónica L. , Valiente Rafael
Published: February 2020

Core–shell nanoparticles provide two fold functionality in nano medicine: reduction of nanotoxicity and improving as a tool for imaging and therapy.
A layered aluminum-based metal–organic framework as a superior trap for nitrobenzene capture via an intercalation role
Authors: Zhang Qi , Jian Meipeng , Zhao Pin , Hu Chengzhi , Qu Jiuhui , Li Xiuyu , Hu Jiukun , Liu Ruiping , Zhang Xiwang
Published: February 2020

A layered aluminum-based metal–organic framework was developed for the efficient removal of nitrobenzene from water.
Suppressed phase transition of a Rb/K incorporated inorganic perovskite with a water-repelling surface
Authors: Zhang Minghua , Chen Xiangjun , Xiao Jiewen , Tai Meiqian , Legut Dominik , Shi Jianchao , Qu Jiale , Zhang Qi , Li Xin , Chen Lan , Zhang Ruifeng , Lin Hong , Zhang Qianfan
Published: February 2020

We revealed the mechanism of improved phase stability of the Rb/K incorporation into inorganic perovskite CsPbI3. Doped Rb/K will segregate in the surface layer, which displayed alleviated lattice distortion and higher water diffusion barrier.
Pillar[5]arene-based tunable luminescent materials via supramolecular assembly-induced Förster resonance energy transfer enhancement
Authors: Song Nan , Lou Xin-Yue , Yu Hao , Weiss Paul S. , Tang Ben Zhong , Yang Ying-Wei
Published: February 2020

Supramolecular ensembles based on AIE-active pillararenes exhibit strongly enhanced emission accompanied with obvious colour changes upon assembly, where supramolecular assembly-induced enhanced emission and FRET process play key roles.
Stability of di-butyl-dichalcogenide-capped gold nanoparticles: experimental data and theoretical insights
Authors: Gorup Luiz Fernando , Perlatti Bruno , Kuznetsov Aleksey , Nascente Pedro Augusto de Paula , Wendler Edison Perevalo , Dos Santos Alcindo A. , Padilha Barros Willyam Róger , Sequinel Thiago , Tomitao Isabela de Macedo , Kubo Andressa Mayumi , Longo Elson , Camargo Emerson Rodrigues
Published: February 2020

This study presents the improved stability against oxidation by molecular oxygen under ambient conditions of organoselenium compared with organothiol, and organotellurium.
The development of isoguanosine: from discovery, synthesis, and modification to supramolecular structures and potential applications
Authors: Ding Tingting , Tang Fan , Ni Guangcheng , Liu Jiang , Zhao Hang , Chen Qianming
Published: February 2020

First systematical review of isoguanosine, an unnatural base, as an isomer of guanosine shows significant differences in diverse properties.
Silk/polyols/GOD microneedle based electrochemical biosensor for continuous glucose monitoring
Authors: Zhao Liang , Wen Zhuangzhuang , Jiang Fujian , Zheng Zhaozhu , Lu Shenzhou
Published: February 2020

This work illustrates the feasibility of a microneedle based electrochemical biosensor for continuous glucose monitoring.
Lanthanide complexes based on a conjugated pyridine carboxylate ligand: structures, luminescence and magnetic properties
Authors: Li Rong-fang , Li Rui-hao , Liu Xin-fang , Chang Xin-hong , Feng Xun
Published: February 2020

The structures, fluorescence and magnetic properties of series three lanthanide complexes have been investigated. Dysprosium complex exhibit the single-molecule behavior.
Quinoline-containing diarylethenes: bridging between turn-on fluorescence, RGB switching and room temperature phosphorescence
Authors: Xu Zhen , Liu Qian T. , Wang Xiaozhu , Liu Qian , Hean Duane , Chou Keng C. , Wolf Michael O.
Published: February 2020

Simple structural modifications using oxidation and methylation of a quinoline-containing diarylethene result in dramatic variation of photophysical properties.
3-Bromotetrazine: labelling of macromolecules via monosubstituted bifunctional s-tetrazines
Authors: Schnell Simon D. , Hoff Lukas V. , Panchagnula Advaita , Wurzenberger Maximilian H. H. , Klapötke Thomas M. , Sieber Simon , Linden Anthony , Gademann Karl
Published: February 2020

3-Bromotetrazine selectively labels small and macromolecules up to proteins and can then be used as a fluorophore or as a bio-orthogonal handle for downstream functionalisation.
Efficient gas and alcohol uptake and separation driven by two types of channels in a porous MOF: an experimental and theoretical investigation
Authors: Li Xiu-Yuan , Li Yong-Zhi , Ma Li-Na , Hou Lei , He Chao-Zheng , Wang Yao-Yu , Zhu Zhonghua
Published: February 2020

A MOF which simultaneously contains hydrophilic and hydrophobic channels was successfully constructed, and this peculiar channel leads to eminent CO2, C2 hydrocarbons and alcohols adsorption amounts as well as selectivities.
Engineering metal sulfides with hierarchical interfaces for advanced sodium-ion storage systems
Authors: Zhao Wenqing , Zhang Limin , Jiang Feng , Chang Xinghua , Yang Yue , Ge Peng , Sun Wei , Ji Xiaobo
Published: February 2020

Utilizing oxygen functional groups, interfacial reactions were carried out on the surface of natural stibnite, resulting in the formation of Sb2S3/Sb core–shell structure and sulfur-doped carbon matrix with improved sodium-storage capabilities.
Exceptionally high electronic mobility in defect-rich Eu2ZnSb2−xBix alloys
Authors: Chanakian Sevan , Uhl David , Neff David , Drymiotis Fivos , Park Junsoo , Petkov Valeri , Zevalkink Alexandra , Bux Sabah
Published: February 2020

Alloying Eu2ZnSb2 with Bi on the Sb site leads to an increase in mobility while still lowering the lattice thermal conductivity.
Nucleotide-driven skin-attachable hydrogels toward visual human–machine interfaces
Authors: Zhang Qin , Liu Xin , Duan Lijie , Gao Guanghui
Published: February 2020

The introduction of a nucleotide endowed hydrogels with self-adhesiveness, reliable mechanical properties, conductivity and high transparency.
Preorganized helical chirality controlled homochiral self-assembly and circularly polarized luminescence of a quadruple-stranded Eu2L4 helicate
Authors: Han Guoying , Zhou Yanyan , Yao Yuan , Cheng Zhenyu , Gao Ting , Li Hongfeng , Yan Pengfei
Published: February 2020

A homochiral quadruple-stranded helicate, ΔΔ-(Eu2L4), assembled from bis-β-diketone with the preorganized helical chirality shows strong circularly polarized luminescence.
Oxidation kinetics of polyunsaturated fatty acids esterified into triacylglycerols and phospholipids in dried scallop (Argopecten irradians) adductor muscles during storage
Authors: Xie Hongkai , Yin Fawen , Liu Zhongyuan , Hu Yuanyuan , Yu Manman , Zhou Dayong , Zhu Beiwei
Published: February 2020

The difference in the oxidative susceptibility of triacylglycerols and phospholipids and the effects of the same polyphenolic antioxidant on such susceptibility in dried scallops.
Interlayer coupling prolonged the photogenerated carrier lifetime of few layered Bi2OS2 semiconductors
Authors: Niu Xianghong , Wu Guangfen , Zhang Xiwen , Wang Jinlan
Published: February 2020

Interlayer coupling inducing an anomalous layer number dependent property of carrier lifetimes in Bi2OS2 nanosheet.
Carbonylative Suzuki–Miyaura couplings of sterically hindered aryl halides: synthesis of 2-aroylbenzoate derivatives
Authors: Ismael Aya , Skrydstrup Troels , Bayer Annette
Published: February 2020

A new protocol for carbonylative coupling of sterically hindered aryl bromides with boronic acids featuring slow addition of the boronic acid as a strategy to suppress unwanted non-carbonylative couplings for sterically hindered aryl bromides.
Stretching and breaking of PEO nanofibres. A classical force field and ab initio simulation study
Authors: Bering Eivind , de Wijn Astrid S.
Published: February 2020

Nanometric bundles are considered in nearly atomistic detail, studying the effect of chain–chain interactions on the mechanical properties.
Crystal structure of HECT domain of UBE3C E3 ligase and its ubiquitination activity
Authors: Singh Sunil , Sivaraman J.
Published: February 2020

The HECT family of E3 ubiquitin ligase is divided into three subfamilies: the NEDD4, the HERC, and the ‘other’. Previous studies have mostly targeted members of the NEDD4 subfamily for structural and functional analysis. The UBE3C E3 ligase is a member of the ‘other’ subfamily HECT and influences several crucial cellular processes, including innate immunity, proteasome processivity, and cancer metastasis. Here, we report the crystal structure of the HECT domain of UBE3C (amino acids (aa) 744–1083) with an additional fifty N-terminal amino acids (aa 693–743) at 2.7 Å, along with multiple in vitro ubiquitination assays to understand its enzymatic activity. The UBE3C HECT domain forms an open, L-shaped, bilobed conformation, having a large N-lobe and a small C-lobe. We show that the N-terminal region (aa 693–743) preceding the UBE3C HECT domain as well as a loop region (aa 758–762) in the N-lobe of the HECT domain affect the stability and activity of UBE3C HECT domain. Moreover, we identified Lys903 in the UBE3C HECT domain as a major site of autoubiquitination. The deletion of the last three amino acids at the C-terminal completely abrogated UBE3C activity while mutations of Gln961 and Ser1049 residues in the HECT domain substantially decreased its autoubiquitination activity. We demonstrate that these region/residues are involved in the E2–E3 transthiolation process and affect the UBE3C mediated autoubiquitination. Collectively, our study identified key residues crucial for UBE3C enzymatic activity, and it may assist in the development of suitable inhibitors to regulate its activity in multiple cancers.
Determination of the true water content, the nature of the impurities and their concentration in transformer oil
Authors: Gizzatova I.D. , Kozlov V.K. , Valiullina D.M.
Published: February 2020

During the operation of transformers, the insulating oil is aging, therefore, there is the deterioration of its insulating properties, which is determined by multiple physico-chemical processes. The most dangerous factor, from the point of view of preserving the operational reliability and resource of a power transformer, is the moisture content of the insulation. Most methods for determining moisture content have measurement errors. These errors are largely dependent on impurities that are contained in the oil. The modified Fisher method proposed in the article allows determining the amount of impurities in the oil and the absolute moisture content. Conducted research allows also to determine the composition of impurities, to reveal the relationship between impurities and some parameters of transformer oil.
Study of power system stability: Matlab program processing data from Zahrani power plant (Beirut, Lebanon)
Authors: Hassan Fouad Alhajj , Sidorov Alexander
Published: February 2020

Stability is of great importance in power systems; instability can cause fluctuations in many parameters of a power system. Since the purpose is to keep feeding the load when a fault or disturbance of overload occurs, the main attention will be focused on over-voltage and frequency because they might make a great damage and shutdown the system. In this study, calculations were performed for one machine connected to infinite bus, considering steady state and transient stability using Matlab to achieve a stable system.
The impact of the transition of hot water “preparation” by means of individual heating stations on the Kazan energy system
Authors: Zapolskaya I.N. , Vankov Yu.V. , Zverev O.I. , Rotach R.R.
Published: February 2020

The result of the implementation of technical solutions should be evaluated in terms of the effect on the power system as a whole. At the same time, the main task is to obtain a socio-economic effect noticeable for the consumer of energy resources, as he is a key figure of the energy system. The article considers the influence of modernization of hot water supply systems (HWS) by transferring the function of hot water preparation in apartment buildings to individual heating stations (IHS) from the district heating stations (DHS) with their subsequent liquidation, as well as the elimination of hot water supply grid. The expected result of these measures is the reduction in heat energy loss in heat carrier agents in heating networks, as well as improving the quality and reliability of the hot water supply system and the possible reduction of energy consumption by residents in apartment buildings. The effect on the operation of the heat supply system will not be provided by IHSs themselves, but by automatic controllers, installed together with them. This, in turn, will make it possible for the Central Heating and Power plants (boiler) to be modernized in operation in a timely manner, to improve the system’s efficiency. Computational studies were carried out in order to assess the impact of the transition from IHS to hot water supply on the energy system.
Prediction of the electrical load of the power system using neural networks
Authors: Nabiullin D.I. , Balobanov R.N.
Published: February 2020

Prediction of the electrical load schedule of an electrical system is an important aspect for determining electrical loads, which ensures the correct selection and cost-effective operation of reactive power compensation devices and voltage control devices, as well as relay protection and automation. This article discusses methods for predicting electrical load using an artificial neural network. The problems of choosing the optimal architecture and algorithm of neural network training are considered. The methods of the best forecast accuracy are determined. A genetic algorithm based on the group method of data handling was chosen as the main calculation.
Perfecting evaluation methods of energy equipment technical condition and resource based on electromagnetic-acoustic effect
Authors: Bashirov M.G. , Luneva N.N. , Khusnutdinova I.G. , Bashirova E.M. , Zakharov N.M. , Gaziev R.R.
Published: February 2020

To assess the technical condition and resource for the safe operation of electric and electrical equipment, it is proposed to use the electromagnetic-acoustic effect and the dynamic identification method based on the analysis of the coordinates of the roots of the characteristic equation (polynomial of the denominator of the transfer function of the system “control object electromagnetic-acoustic transducer”) on the complex plane . The transfer function of the studied system “control object electromagneticacoustic transducer” is an integral quantitative parameter characterizing the state of the equipment metal.
Ways to improve safety in the power industry: an automated hardware complex for pre-shift inspection of personnel of power enterprises
Authors: Hizbullin Robert , Hizbullin Radik
Published: February 2020

This article discusses the possibility of using an automated medical hardware complex at energy enterprises that provides monitoring of the state of health of enterprise personnel. The complex under consideration includes individual functional devices with technical characteristics that ensure, during a preshift inspection, high reliability of the registered physiological parameters of the examined workers and, as a result, the reliability of monitoring the state of health of the examined.
Software platform for analysis of data in the field of waste management
Authors: Epifancev K.V. , Solovev S.A.
Published: February 2020

This article is dedicated modern problem of soft poor in recycling in Russia. In our time we have a big problem with ecology and need automatization process of exchange waste. In first time it will be an account in which every people may be write information about own waste, which he wanted utilizationing. In net, another client matter may see this information and may be -it want buy these waste, for business, for example. So, we need analyzed all program, which take part in performance , Russian plants, because every day produced hundred tons of waste. About this soft, and another analogical program discussing in this article.
Feasibility study on the use of oil-well tubing in construction of intermediate support for 6-10 kV high voltage overhead power lines in the development of oilfields
Authors: Korkishko A.N. , Korkishko O.A. , Kosov A.A.
Published: February 2020

This article is devoted to assessing the technical effectiveness and economic feasibility of oilwell tubing in construction of intermediate supports for overhead power lines (6–10 kV) in the development of oil, gas and condensate field in the conditions of Far North. The article considers the technical possibility and economic feasibility of using the built-up cross section of the intermediate support of overhead lines consisting of two tubes welded together. The SCAD office software was used to calculate the strength of the proposed section for the design load, taking into account the impact of climatic factors. A comparative analysis of the construction cost was performed for 1 km of overhead power lines made of conventional materials and oil-well tubing. The calculations showed the feasibility of using this material for the construction of 6-10 kV overhead lines.
Organizational loyalty as a characteristic of management quality for an energy company
Authors: Syanevets T.D. , Sudakova T.V.
Published: February 2020

Globalization leads to the diminishing of national economic systems boundaries, standartization of production processes and companies management, thus it is becoming more difficult to form competitive advantages. Research has shown that company’s competitiveness and its reputation depend on the management quality which is influenced by many factors including level of personnel loyalty. The problem concerning personnel loyalty is common for most Russian energy companies, the management stuff of which believe that employees should work efficiently as they get paid for it. Research shows that there are several problems in this field, namely: lack of effective communications between management stuff and employees, lack of workers interest in the results, low motivation for goals achievement, low-innovative behavior and so on. Managers consider these problems when it is too late and company faces bankruptcy and there is no time to alter the situation. Competencies in managing personnel loyalty defines important component of management quality – goodwill. Goodwill is a number of business elements and personal characteristics of workers, which stimulate clients to continue use of products and services of particular company and bring additional profit.
Risks in the energy sector: the analysis of management practices in the electricity market
Authors: Zhilkina Y , Akhmetshin A
Published: February 2020

Energy security is today one of the most discussed event in international economic relations. It is being actively discussed by all governments and leading international organizations. There doesn’t exist any universal definition of energy sector. In addition to the lack of such a universal definition, analysis of decisions in this area, one notices the lack of attention to such phenomena as risks in the energy sector, especially in the management of investment projects in the industry. For most industrial countries, energy insecurity means import dependency and aging infrastructure, while many emerging economies have additional vulnerabilities such as insufficient capacity, high energy intensity, and rapid demand growth. In many low-income countries, multiple vulnerabilities overlap, making them especially insecure.
Model of personnel activities in emergencies during the operation of an electric power facility
Authors: Alekin D.Y. , Soloveva O.V. , Kostyleva E.E. , Yagovkin N.G.
Published: February 2020

In this paper, a model of personnel activities in emergencies during the operation of an electric power facility is proposed. The factors that characterize the inerrancy of the activities of operational personnel and their relationships that determine the effectiveness of actions are identified. The efficiency of various strategies of human behavior is a function of properties of the situation, technical condition, as well as characteristics of equipment and professional attributes of the person.
Trigger low-voltage devices electromechanical apparatus
Authors: Zaitsev N Yu , Zaitsev Yu.M. , Mikhailova E.V. , Sazanov D.S. , Svintsov G.P.
Published: February 2020

Based on the analysis of the existing classification of low-voltage electromechanical devices, it was proposed, on the basis of the functions performed, to unite into the group of electromagnetic mechanisms the indicating relays, vacuum contactors, time relays with clockwork, and executive bodies of circuit breaker releases. The definition of launching devices is given, the main feature of which is a mechanical characteristic, the change of which, with appropriate coordination with the traction characteristic of an electromagnet, can lead to an improvement of the most important characteristics of these devices, such as power consumption and resistance to mechanical influencing factors. On the example of the calculation of the index relay, it is shown and experimentally confirmed that a change in the initial force of the mechanical characteristic and its rigidity leads to a decrease in power consumption while maintaining shock stability.
Exergy pinch analysis of a furnace in a primary oil refining unit
Authors: Lebedev Vladimir , Yushkova Ekaterina , Churkin Ivan
Published: February 2020

The article considers the issue of thermodynamic optimization of heat power equipment. The solution to this problem allows one to increase the energy efficiency of heat systems by reducing the energy resources consumption. The article compares the traditional (enthalpy) pinch method and the exergy pinch method. The exergy method of thermodynamic analysis allows one to take into account both quantitative and qualitative characteristics of thermal processes. A furnace that heats oil in the ELOU AT-6 primary oil refining unit was selected as an object of the study. The results obtained using the traditional pinch method showed that the furnace does not require optimization. However, the exergy analysis showed that the furnace has exergy losses. The method of exergy pinch analysis allows us to formulate and justify specific design measures aimed at increasing the furnace energy efficiency. Using the exergy pinch analysis, one can identify the unused exergy and determine the part in which the loss occurs.
Animation + Agricultural Microbiology Insterdisciplinary VR Curriculum Development in the Background of Industry–Academia Collaborative Education
Authors: Tu Xianzhi , Xin Jue , Zhang Rong
Published: February 2020

Since the teaching in colleges and universities is divided into disciplines according to knowledge fields, so there is distinct boundary between disciplines in actual teaching, which leads to the lack of interdisciplinary thinking and cross-professional knowledge of students, and it also becomes difficult for colleges and universities to cultivate talents. The development of the new era places new demands on higher education. The construction of new liberal arts and new agricultural sciences requires innovative research on interdisciplinary research methods, talent training models, and research and development of the teaching content. VR virtual reality technology is used to carry out interdisciplinary research on animation teaching and agricultural microbiology teaching, and develop new curriculum, which can effectively enhance the effectiveness of teaching in various disciplines, and open up new teaching content and research ideas for animation and agricultural microbiology courses. Virtual reality technology and digital animation art provide an interactive and immersive teaching experience for the teaching and research of agricultural microbiology, and also inspire new ideas for teaching and research of new agricultural sciences. The content of agricultural microbiology provides research content for the creation of animation arts and expands the space for technology research and development. This article will discuss from the perspective of research background and research analysis, promote the development of interdisciplinary research in higher education, and also explore the research model of interdisciplinary curriculum development.
A Clinical Study on Treatment of Facial Freckles with Intense Pulsed Light
Authors: Xiao Yan
Published: February 2020

Purpose: To explore the clinical effect of intense pulsed light on freckles. Methods: A total of 102 patients with facial freckles treated in our hospital between November 2014 and May 2017 were taken as the subjects of this study. The patients, after being confirmed with facial freckles, were treated with M22 Photorejuvenation, and evaluated at the end of the treatment in terms of therapeutic effect, adverse reactions, changes of indicators before and after treatment as well as relapse. Results: In terms of treatment effect, there were 46 patients (45.10%) above expectation, 50 patients (49.02%) up to expectation and 6 patients (5.88%) below the standard, with a total effective rate of 94.12%. In terms of adverse reactions, there were 8 patients with temporary facial flushing, 4 patients with mild edema and 3 patients with burning sensation, with a probability of 14.71%. In terms of indicator changes before and after treatment, the skin elasticity and skin moisture of each part of the patient’s face were improved, with the skin elasticity of the patient’s forehead and lower jaw up by 8.9% and 8%, respectively, and the skin moisture of the patient’s left cheek up by 25.7%, which was very obvious. In addition, the proportion of melanin and skin oil of the patients were significantly reduced, with the melanin proportion of the left cheek down by 30.1% and the overall skin oil proportion of the face down by about 1%. At the end of the treatment, 5 patients had freckle recurrence, with a recurrence rate of 4.90%, which was statistically significant (P<0.05). Discussion: The intense pulsed light is an effective tool in the treatment of facial freckles. Despite occasional adverse reactions, multiple indicators of various parts of the patient’s face have been significantly improved, with a low probability of later recurrence, making it worthy of clinical promotion.
Hybridization and Cutting of Buddleja Genus
Authors: Zhang Jialin
Published: February 2020

Buddleia davidii, also known as butterfly bush, is a unique species in China, with extensive cultivation and promotion values. The purpose of cross-breeding is to promote environmental adaptation and improve its economic benefits as a garden plant.. As Buddleja is asexual, cutting can aid in mass production of the hybrid offspring, thus stabilising local ecosystem.
Membrane–based separation and concentration of total flavone glycosides from Desmodium styracifolium
Authors: Yang Kun , Guo Ze-Bin , Li Kun-Ping
Published: February 2020

Desmodium styracifolium is one of the traditional Chinese herbs. In the present study, membrane-based technologies were used to separate and concentrate of the total flavone glycosides fraction from D. styracifolium. The extracts flowed through an ultrafiltration membrane which MWCO (molecular weight cut-off) is 30KDa and the permeate was concentrated by MWCO-1KDa nano-filtration membrane. The solid content of the membrane concentrated extracts of D. styracifolium (MEDs) was 26.5 mg/ml. Moreover, the content of vicenin-2, schaftoside and isovitexin in MEDs were 4.88 %, 9.76 %, 1.89 % respectively. The assay in vitro showed MEDs has better anti-inflammatory effect which partly proved that our membrane-based processes for separation and concentration of flavone glycosides from D. styracifolium is reliable and practicable.
Experimental study on the sEMG of "joint angle effect" of human muscle strength—Taking biceps brachii as an example
Authors: Gao Jianxin , Han Cheng , Huang Wenying , Gao Jianjun , Nie Liaoliang
Published: February 2020

In the experiment, the author used wave plus wireless surface electromyography system (SEMs + 3-axis acceleration sensor) made in Italy and wave wireless EMG software system, high-definition high-speed camera and human joint angle measuring instrument. Taking human biceps brachii as an example, the static and dynamic isometric contraction of biceps brachii was completed surface electromyography. In the experiment, the surface electromyography of biceps brachii was measured at 30°, 60°, 90°, 120°, 150°, 180° and the surface electromyography of biceps brachii was measured at the same time when the biceps brachii was not loaded or when the biceps brachii was loaded. Secondly, the surface electromyography of biceps brachii was measured at the same time when the biceps brachii completed the whole process of flexion and extension of the elbow (centripetal and centrifugal). Finally, the paper combined with HD The effect of joint angle on the contraction of biceps brachii muscle was analyzed by camera technique. The results show that the static contraction force of biceps brachii is different when the elbow joint is at different angles; in addition, when the dynamic contraction, the contraction force of biceps brachii is inversely proportional to the angle of elbow joint.
Polysaccharides from ophiopogon japonicus protect against oxidative damage induced by strenuous exercise
Authors: Sun Dahu , Lin Jinyang
Published: February 2020

Dry tuberous roots of ophiopogon japonicus are famous Chinese herbal medicines. Several studies have been shown that polysaccharide is one of the main active ingredients of ophiopogon japonicus and plays an important role in pharmacological action. In the study, the effects of polysaccharides from ophiopogon japonicus (POJ) on the oxidative damage induced by strenuous exercise were investigated. Male mice were randomly divided into four groups and designated as high-dose POJ-treated, medium-dose POJ-treated, low-dose POJ-treated and control groups, which received 80, 40, and 20 mg/kg POJ and physiological saline, respectively, by gavage once a day for 28 days. This was followed by an exhaustive running exercise and measurements of various biochemical parameters from blood and muscles tissue. The results showed that POJ could significantly prolong the exhaustive running time of mice, decrease the levels of lactate dehydrogenase (LDH), creatine kinase (CK) and 8-Hydroxy-2′-deoxyguanosine (8-OHdG) in blood, and malondialdehyde (MDA) levels in muscle, which were accompanied by corresponding increased levels of superoxide disproportionation enzyme (SOD), glutathione peroxidase (GPx), and catalase (CAT) in muscle. The data suggest that POJ have protective effects on strenuous exercise-induced oxidative damage.
Study on Migration of Two Triazine Type Ultraviolet Absorbents from Polypropylene Packaging Materials to Food Simulant
Authors: Qiu Yue , Ruan Yan , Li Genrong
Published: February 2020

The migration rules of two triazine type of UV absorbents (UV-1577 and UV-1579) from polypropylene (PP) food contact materials to food simulant were investigated. A rapid detection method of UV-1577 and UV-1579 in PP food contact materials was established by ultra-performance convergence chromatography (UPC2). The optimal extraction method of the initial solution was determined, and the pretreatment methods of two UV absorbents in the liquid simulants were optimized. Experiment results showed that the interaction effects between the two UV absorbers and the liquid simulants were weak, and the migration behavior was the most obvious in the fatty simulant of isooctane. At the same temperature, the migration amount of both UV-1577 and UV-1579 increased with the extension of time, and UV-1577 was more prone to migration than UV-1579. Within a certain range, the migration amount of the two UV absorbents increased significantly with the increase of the migration temperature. The higher the temperature was, the shorter the time required to reach the equilibrium.
Optimization of extraction of polysaccharides from Suaeda salsa (L.) Pall. by ultrasonic: characterization, purification and antioxidant assessment
Authors: Fu Jianxin , Shao Jiawei , Wang Meng , Zhang Guixiang , Fang Yishan
Published: February 2020

Under optimal extraction conditions, characterization and antioxidant activity of polysaccharides from the Suaeda salsa (L.) Pall. were investigated. This was the first report that described the composition of the polysaccharide form this plant. Obviously, the yield of 2.19% for extraction of polysaccharides was obtained as ethanol volume fraction of 65%, extraction time of 72 min, ultrasound assisted power of 438 W, and temperature of 85°C, respectively. The structure study was carried out with FT-IR and SEM, and the chemical contents of carbohydrates, proteins, uronic acids and total flavonoids were measured in this study. The crude polysaccharides were purified into two components including SGP-1-1 and SGP-2-1. Moreover, the chemical composition analysis according to HPLC showed that it was viscous polysaccharide, which mainly contained glucose, mannose, xylose, galacturonic acid, glucuronic acid, fucose, rhamnose, arabinose, galactose, respectively. Besides, it was proved that the optimum polysaccharides possessed higher significant potentials (P<0.05) in scavenging ability against DPPH, ABTS+ and hydroxyl radical.
Antioxidant activity in endophytic fungi isolated from Gynostemma pentaphyllum Makino
Authors: Fei Shang , Chunlin Wang , Hui Wang
Published: February 2020

Gynostemma pentaphyllum Makino is a well known edible and medicinal plant in oriental countries, its dominant active constituents are mainly Gypenosides(GP). Endophytic fungi with antioxidant activity were screened and identified from gynostemma pentaphyllum, and gynostemma pentaphyllum saponin (GP) was used as host. A total of 10 strains of endophytic fungi were isolated from the root of healthy, living, and symptomless tissues of Gynostemma pentaphyllum Makino. The extract from a strain (G4) showed antioxidant activity and had the same RF value in TLC, because the retention time of real gynostemma pentaphyllum saponin (GP) and its extract was the same as that of natural gynostemma pentaphyllum (GP) in HPLC. So the strain G4 of endophytic fungus appears to produce the same components as its host.
Effect of Bagging on the Content of Sugar and Acid in Postharvest "Jinhuang" Mango Fruit
Authors: Wei Changbin , Qiao Jian , Tang Xinming , Yan Qingze , Tang Lizhu , Ma Zhiling
Published: February 2020

The glucose, fructose, sucrose, and organic acids in the pulp of “Jinhuang” mango were analyzed using the HPLC method and the effect of bagging on fruit quality was researched during the postharvest storage. The results showed that there was a certain difference in the content of sugar and acid among the three treatments. The effect of bagging treatments on fructose, glucose, and sucrose in the fruit of “Jinhuang” mango was mainly reflected in sucrose. The treatments of white bagging (WB) and black bagging (BB) delayed the production of sucrose and the decomposition of citric acid, and increased the content of ascorbic acid and quinine. Based on sugar-acid ratio, the flavor of the three treatments was evaluated as: CK> WB> BB. The fruit quality of “Jinhuang” mango was affected by bagging treatments to a certain extent.
Research on the gravity planning model of prefecture city rail transit network
Authors: Liang Tianwen , Liu Huan , Tan Yong
Published: February 2020

The rational layout of prefecture city rail transit network is of great significance to the coordinated development of urban and rural areas. This paper analyses five related factors that affect the layout of rail transit and grey relation analysis is used to analyse the correlation degree and weight of five related factors. Based on this, an improved gravity model describing the attraction between towns is built. The improved gravity model is used as the road weight, and the urban rail transit network layout is obtained by graph theory Kruskal algorithm. Finally, taking the urban rail transit network in Handan as an example, the rationality and feasibility of the model and layout method are checked.
Key Technology Research and Demonstration Application of Green Design and Construction of Zihui Expressway
Authors: Zheng Jianhao , Wu Yucai , Wang Wei , Wang Dan , Shang Xiaodong
Published: February 2020

This paper takes Zihui expressway as an example, from the perspective of green design and construction of mountain expressway, this paper mainly discusses and analyzes the project characteristics and technical requirements of Zihui expressway, and puts forward the key technology of green design and construction based on the establishment of green highway.
Research Progress on Soil Erosion and Socioeconomic Correlation
Authors: Sun Yan , Xiao Junbo , Zhang Yiyuan , Lai Wenhao , Wei Min , Wang Junming
Published: February 2020

Soil erosion and socio-economic interacts with each other. Soil and water loss destroys land resources, causes non-point source pollution, affects the recycling and utilization of water resources, worsens the water environment, and even causes natural disasters such as collapse, landslides, and debris flows. Soil erosion affects regional socio-economic development. On the one hand, economic and social development has caused a sharp increase in people’s demand for the development and utilization of natural resources, which has increased the occurrence of soil and water loss; on the other hand, economic and social development has promoted people’s understanding of soil erosion and soil and water conservation, enabling people to consciously change their production and lifestyle, and having sufficient funds to invest in soil and water conservation and reduce soil erosion.