bluuebunny/crossref_metadata_2025 huggingface dataset:
2D polarization imaging as a low-cost fluorescence method to detect α-synuclein aggregation ex vivo in models of Parkinson’s disease
Authors: Camacho Rafael , Täuber Daniela , Hansen Christian , Shi Juanzi , Bousset Luc , Melki Ronald , Li Jia-Yi , Scheblykin Ivan G.
Published: September 2018

A hallmark of Parkinson’s disease is the formation of large protein-rich aggregates in neurons, where α-synuclein is the most abundant protein. A standard approach to visualize aggregation is to fluorescently label the proteins of interest. Then, highly fluorescent regions are assumed to contain aggregated proteins. However, fluorescence brightness alone cannot discriminate micrometer-sized regions with high expression of non-aggregated proteins from regions where the proteins are aggregated on the molecular scale. Here, we demonstrate that 2-dimensional polarization imaging can discriminate between preformed non-aggregated and aggregated forms of α-synuclein, and detect increased aggregation in brain tissues of transgenic mice. This imaging method assesses homo-FRET between labels by measuring fluorescence polarization in excitation and emission simultaneously, which translates into higher contrast than fluorescence anisotropy imaging. Exploring earlier aggregation states of α-synuclein using such technically simple imaging method could lead to crucial improvements in our understanding of α-synuclein-mediated pathology in Parkinson’s Disease.
Carboxyphenyl-terpyridine-based series of gels for procedural visual recognition of multi-anions
Authors: Yuan Dan , Li Yuan Fang
Published: September 2018

The gelation of 4-[2,2′:6′,2′′-terpyridine]-4′-ylbenzoic acid (Hcptpy) occurred with various metal ions and specific anions. With the gel formation, corresponding metal ions and anions were recognized. Also, the metal–organic gels (MOGs) possess stimuli response property to anions. A step-by-step anion recognition progress was established based on one Hcptpy ligand and realized the selective identification 12 kinds of anions.
Fluorinated polymeric micelles to overcome hypoxia and enhance photodynamic cancer therapy
Authors: Wang Qian , Li Jia-Mi , Yu Hui , Deng Kai , Zhou Wei , Wang Cai-Xia , Zhang Yang , Li Kun-Heng , Zhuo Ren-Xi , Huang Shi-Wen
Published: September 2018

Perfluoroalkyl groups-containing polymeric micelles were constructed to transport oxygen, overcome the hypoxia of tumours and enhance photodynamic cancer therapy.
Flexible lithium–CO2 battery with ultrahigh capacity and stable cycling
Authors: Xu Shaomao , Chen Chaoji , Kuang Yudi , Song Jianwei , Gan Wentao , Liu Boyang , Hitz Emily M. , Connell John W. , Lin Yi , Hu Liangbing
Published: September 2018

A flexible high-performance lithium–CO2 battery is developed using wood-based cathode as a novel platform for combining CO2 utilization and energy storage.
Influence of organic compounds on the sulfidation of copper oxide nanoparticles
Authors: Gogos Alexander , Voegelin Andreas , Kaegi Ralf
Published: September 2018

Organic compounds affect the formation and stability of CuO-NP sulfidation products.
A multiscale approach to study molecular and interfacial characteristics of vesicles
Authors: Yu Xiang , Dutt Meenakshi
Published: September 2018

The functions of colloids, such as membranes and vesicles, are dictated by interfacial properties which are determined by an interplay of physical interactions and processes spanning multiple spatiotemporal scales.
Electrospun superhydrophilic membranes for effective removal of Pb(ii) from water
Authors: Zang Linlin , Lin Ru , Dou Tianwei , Lu wang Lu wang , Ma Jun , Sun Liguo
Published: September 2018

Electrospun hydrogel-wrapped membranes with a tunable thickness of the functional shell of the nanofibers are used to adsorb Pb(ii) in aqueous solution.
Movement of palladium nanoparticles in hollow graphitised nanofibres: the role of migration and coalescence in nanocatalyst sintering during the Suzuki–Miyaura reaction
Authors: Lodge Rhys. W. , Rance Graham. A. , Fay Michael. W. , Khlobystov Andrei. N.
Published: September 2018

The evolution of individual palladium nanoparticle (PdNP) catalysts, in graphitised nanofibres (GNF), in the liquid-phase Suzuki–Miyaura (SM) reaction has been appraised.
Engineering and evaluation of amyloid assemblies as a nanovaccine against the Chikungunya virus
Authors: Babych Margaryta , Bertheau-Mailhot Geneviève , Zottig Ximena , Dion Jessica , Gauthier Laurie , Archambault Denis , Bourgault Steve
Published: September 2018

A synthetic self-assembled fibrillar nanovaccine decorated with an antigenic determinant from the Chikungunya virus elicits a robust immune response.
Protein-modified conjugated polymer nanoparticles with strong near-infrared absorption: a novel nanoplatform to design multifunctional nanoprobes for dual-modal photoacoustic and fluorescence imaging
Authors: Gao Duyang , Zhang Pengfei , Liu Yubin , Sheng Zonghai , Chen Huajie , Yuan Zhen
Published: September 2018

A general method to engineer photoacoustic/fluorescence dual-modal imaging nanoprobes has been proposed based on stable near-infrared conjugated polymer nanoparticles.
Three-dimensionally ordered mesoporous multicomponent (Ni, Mo) metal oxide/N-doped carbon composite with superior Li-ion storage performance
Authors: Oh Se Hwan , Kim Jin Koo , Kang Yun Chan , Cho Jung Sang
Published: September 2018

A simple preparation method of mesoporous multicomponent metal oxides containing Ni and Mo components with N-doped carbon by spray pyrolysis process is introduced.
Three-dimensional hierarchical Ni3Se2 nanorod array as binder/carbon-free electrode for high-areal-capacity Na storage
Authors: Fan Chao-Ying , Zhang Xiao-Hua , Shi Yan-Hong , Xu Hai-Yang , Zhang Jing-Ping , Wu Xing-Long
Published: September 2018

A three-dimensional hierarchical Ni3Se2 nanorod array is the first to act as carbon/binder-free electrode for high-areal-capacity sodium ion batteries via a one-step reversible conversion reaction.
Superhalogen-based composite with strong acidity-a crossing point between two topics
Authors: Zhao Ru-Fang , Zhou Fu-Qiang , Xu Wen-Hua , Li Jin-Feng , Li Chao-Chao , Li Jian-Li , Yin Bing
Published: September 2018

Correlation between the acidity and the vertical electron detachment energy verifies the rationality of constructing superacid from superhalogen.
Transmission electron microscopy as an important tool for characterization of zeolite structures
Authors: Wan W. , Su J. , Zou X. D. , Willhammar T.
Published: September 2018

This review presents various TEM techniques including electron diffraction, high-resolution TEM and scanning TEM imaging, and electron tomography and their applications for structure characterization of zeolite materials.
Hierarchical flower-like Ni–Co layered double hydroxide nanostructures: synthesis and super performance
Authors: Dong Tao , Zhang Xiao , Li Meng , Wang Peng , Yang Ping
Published: September 2018

Three-dimensional hierarchical flower-like Ni–Co LDHs have been prepared with a large specific surface area and expanded interlayer spacing as an adsorbent for removing anionic dyes and as an electrode for supercapacitors.
Liquid crystal gelators with photo-responsive and AIE properties
Authors: Yu Xia , Chen Hui , Shi Xiang , Albouy Pierre-Antoine , Guo Jia , Hu Jun , Li Min-Hui
Published: September 2018

trans-Cn-Chol present smectic A phase and photo-responsive SmA–isotropic phase transition, and their organogels exhibit aggregation-induced emission and photo-responsive gel–sol transition.
Hydrogen-bonded-assisted supramolecular microwires for pure violet lasers: benefits of preventing intermolecular π–π stacking and aggregation in single crystals
Authors: Xu Man , Ou Chang-Jin , Gao Chao , Lin Jin-Yi , Xu Wei , Yu Meng-Na , Zhu Wen-Sai , Lin Zong-Qiong , Bai Lu-Bin , Han Ya-Min , Xie Ling-Hai , Huang Ling , Xu Chun-Xiang , Zhao Jian-Feng , Wang Jian-Pu , Huang Wei
Published: September 2018

To isolate fluorophore in crystalline framework via supramolecular self-encapsulation is an effective strategy to fabricate high-performance organic single-crystal lasers.
Electrochemical synthesis of 7-membered carbocycles through cascade 5-exo-trig/7-endo-trig radical cyclization
Authors: Long Hao , Song Jinshuai , Xu Hai-Chao
Published: September 2018

An electrochemical synthesis of functionalized 7-membered carbocycles through a 5-exo-trig/7-endo-trig radical cyclization cascade has been developed.
Enantioselective and regiodivergent allylation of pyrimidines with terminal allenes: an approach to pyrimidine acyclic nucleosides
Authors: Liang Lei , Niu Hong-Ying , Xie Ming-Sheng , Qu Gui-Rong , Guo Hai-Ming
Published: September 2018

An atom-economic addition of pyrimidines to allenes has been developed for the diverse synthesis of branched or linearN-allylpyrimidine analogues.
Oxidative ring-opening of 3-aminoindazoles for the synthesis of 2-aminobenzoates
Authors: Zhou Yao , Song Qiuling
Published: September 2018

A novel oxidative ring-opening of 3-aminoindazoles based on N–N bond cleavage was developed, in which various 2-aminobenzoates were obtained in good yields under mild conditions.
Tandem dihetero-Diels–Alder and Huisgen cycloaddition reactions. Synthesis, crystal structure and hydrolysis of the novel cage phosphoranes
Authors: Khasiyatullina Nadezhda R. , Baronova Tamara A. , Mironova Ekaterina V. , Fayzullin Robert R. , Litvinov Igor A. , Efimov Sergey V. , Musin Rashid Z. , Klochkov Vladimir V. , Mironov Vladimir F.
Published: September 2018

The reaction of 2-(1-phenylvinyloxy)benzo-1,3,2-dioxaphosphole with activated carbonyl compounds leads to the stereoselective formation of cage phosphoranes.
How experimental details matter. The case of a laccase-catalysed oligomerisation reaction
Authors: Kashima Keita , Fujisaki Tomoyuki , Serrano-Luginbühl Sandra , Khaydarov Abbos , Kissner Reinhard , Ležaić Aleksandra Janošević , Bajuk-Bogdanović Danica , Ćirić-Marjanović Gordana , Schuler Lukas D. , Walde Peter
Published: September 2018

A laccase-catalysed oligomerisation ofp-aminodiphenylamine was investigated in an aqueous medium containing 80–100 nm-sized anionic vesicles formed from AOT, the sodium salt of bis(2-ethylhexyl)sulfosuccinic acid.
Buoyant force-induced continuous floating and sinking of Janus micromotors
Authors: Wu Meisheng , Koizumi Yuki , Nishiyama Hiroki , Tomita Ikuyoshi , Inagi Shinsuke
Published: September 2018

Novel bubble-induced ultrafast moving of micromotors based on the difference between buoyant force and gravity is proposed.
Enhanced photoresponse of a high-performance self-powered UV photodetector based on ZnO nanorods and a novel electrolyte by the piezo-phototronic effect
Authors: Peng Xiaoli , Wang Weihao , Zeng Yiyu , Pan Xinhua , Ye Zhizhen , Zeng Yujia
Published: September 2018

A flexible UV detector exhibits high performance. The photoresponse of the device under different upward angles (tensile strain) and downward angles (compressive strain) were studied. A 163% change in responsivity was obtained when the downward angle reached 60°.
Identification of the dominant hydrogeochemical processes and characterization of potential contaminants in groundwater in Qingyuan, China, by multivariate statistical analysis
Authors: Liang Zuobing , Chen Jianyao , Jiang Tao , Li Kun , Gao Lei , Wang Zhuowei , Li Shaoheng , Xie Zhenglan
Published: September 2018

In karst areas, groundwater is an important water source for drinking and irrigation purposes; however, karst aquifers are vulnerable and recovery from damage is difficult.
A biomimetic fluorescent chemosensor for highly sensitive zinc(ii) detection and its application for cell imaging
Authors: Yan Rui , Wang Zhi , Du Zongliang , Wang Haibo , Cheng Xu , Xiong Junjie
Published: September 2018

To fabricate a novel biomimetic fluorescent chemosensor, PSaAEMA-co-PMPC was synthesized via atom transfer radical polymerization, and this copolymer could be used for the detection of zinc(ii) and cell imaging.
Degradation of recalcitrant organics in landfill concentrated leachate by a microwave-activated peroxydisulfate process
Authors: Gu Zhepei , Chen Weiming , Li Qibin , Wang Ying , Wu Chuanwei , Zhang Aiping
Published: September 2018

A microwave-activated peroxydisulfate process was used to the pre-treatment for recalcitrant organics in concentrated leachate.
Polyaniline modified magnetic nanoparticles coated with dicationic ionic liquid for effective removal of rhodamine B (RB) from aqueous solution
Authors: Shahriman Mohamad Shariff , Mohamad Zain Nur Nadhirah , Mohamad Sharifah , Abdul Manan Ninie Suhana , Yaman Suhaila Mohd , Asman Saliza , Raoov Muggundha
Published: September 2018

Schematic diagram of the removal procedure of RB on MNP-PANI-DICAT.
Recognition and optical sensing of amines by a quartz-bound 7-chloro-4-quinolylazopillar[5]arene monolayer
Authors: Pisagatti Ilenia , Gattuso Giuseppe , Notti Anna , Parisi Melchiorre F. , Brancatelli Giovanna , Geremia Silvano , Greco Francesco , Millesi Salvatrice , Pappalardo Andrea , Spitaleri Luca , Gulino Antonino
Published: September 2018

Pillar[5]arene-decorated quartz slides for the direct detection of linear amines and diamines are now available.
Alloying copper and palladium nanoparticles by pulsed laser irradiation of colloids suspended in ethanol
Authors: Gal Gyora , Monsa Yaakov , Ezersky Vladimir , Bar Ilana
Published: September 2018

Synthesis of alloyed copper palladium nanoparticles through lateral collimated and top focused laser irradiation of their suspended colloids in ethanol. These configurations allowed control of the extent of alloying at the nanoscale.
Green and efficient biosynthesis of indigo from indole by engineered myoglobins
Authors: Liu Can , Xu Jiakun , Gao Shu-Qin , He Bo , Wei Chuan-Wan , Wang Xiao-Juan , Wang Zhonghua , Lin Ying-Wu
Published: September 2018

Myoglobin (Mb) was redesigned to a green and efficient biocatalysts for the biosynthesis of indigo from indole, exhibiting improved yield, catalytic efficiency and chemoselectivity (as high as ∼80%).
Encapsulation of C–N-decorated metal sub-nanoclusters/single atoms into a metal–organic framework for highly efficient catalysis
Authors: Qiu Xuan , Chen Jianmin , Zou Xinwei , Fang Ruiqi , Chen Liyu , Chen Zhijie , Shen Kui , Li Yingwei
Published: September 2018

A facile strategy was designed for the encapsulation of C–N-decorated Pd sub-nanoclusters/single atoms into MOF pores by the confined thermolysis of metal–organic polyhedra (MOPs). The obtained hybrids exhibited excellent catalytic performance in various important chemical processes.
Tuning the order of colloidal monolayers: assembly of heterogeneously charged colloids close to a patterned substrate
Authors: Locatelli Emanuele , Bianchi Emanuela
Published: September 2018

We study the behavior of negatively charged colloids with two positively charged polar caps close to a planar patterned surface.
Viscous friction of squeezed bubbly liquid layers
Authors: Morini Romain , Chateau Xavier , Ovarlez Guillaume , Pitois Olivier , Tocquer Laurent
Published: September 2018

Confined bubbly liquids exhibit a non-monotonic evolution of their shear viscosity as a function of the confinement ratio.
Hard convex lens-shaped particles: metastable, glassy and jammed states
Authors: Cinacchi Giorgio , Torquato Salvatore
Published: September 2018

Positionally and/or orientationally disordered packings of possibly jammed hard convex lens-shaped particles are thoroughly investigated.
Self-adaptive electrochemical reconstruction boosted exceptional Li+ ion storage in a Cu3P@C anode
Authors: Ni Shibing , Zheng Bin , Liu Jilei , Chao Dongliang , Yang Xuelin , Shen Zexiang , Zhao Jinbao
Published: September 2018

Well dispersed Cu3P dots embedded in a C matrix giving high Li-ion storage activity, improved electronic conductivity and stability are induced via a self-adaptive electrochemical reconstruction upon cycling, which triggers exceptional performance.
Bio-inspired multiscale-pore-network structured carbon felt with enhanced mass transfer and activity for vanadium redox flow batteries
Authors: Wu Qixing , Zhang Xiangyang , Lv Yunhui , Lin Liyu , Liu Yao , Zhou Xuelong
Published: September 2018

This work reported a bio-inspired multiscale-pore-network structured carbon felt for simultaneously achieving fast mass transfer and reaction activity in flow batteries.
Constructing a novel TiO2/γ-graphyne heterojunction for enhanced photocatalytic hydrogen evolution
Authors: Wu Lulu , Li Qiaodan , Yang Chaofan , Ma Xiaoqing , Zhang Zefan , Cui Xiaoli
Published: September 2018

TiO2/γ-graphyne nanocomposites were successfully synthesizedviaa simple hydrothermal method, and demonstrated as a promising photocatalyst for hydrogen evolution.
High thermoelectric performance of single phase p-type cerium-filled skutterudites by dislocation engineering
Authors: Meng Xianfu , Liu Yuan , Cui Bo , Qin Dandan , Cao Jian , Liu Weishu , Liu Zihang , Cai Wei , Sui Jiehe
Published: September 2018

Filled skutterudites, possessing a high power factor and good mechanical properties, have attracted intensive attention for the intermediate-temperature power generation.
The nickel battery positive electrode revisited: stability and structure of the β-NiOOH phase
Authors: Casas-Cabanas Montse , Radin Maxwell D. , Kim Jongsik , Grey Clare P. , Van der Ven Anton , Palacín M. Rosa
Published: September 2018

β-NiOOH crystallizes in a TP2 structure where both T and P hydrogen atoms form primary and secondary H-bonds with oxygen.
Hierarchical layer-by-layer porous FeCo2S4@Ni(OH)2 arrays for all-solid-state asymmetric supercapacitors
Authors: Li Shuo , Huang Wei , Yang Yuan , Ulstrup Jens , Ci Lijie , Zhang Jingdong , Lou Jun , Si Pengchao
Published: September 2018

A comprehensive study of the chemical synthesis and electrochemical properties of a new FeCo2S4@Ni(OH)2 layer-by-layer material for high-performance all-solid-state supercapacitor.
Greener transformation of lignin into ultralight multifunctional materials
Authors: Cho Mijung , Karaaslan Muzaffer , Wang Han , Renneckar Scott
Published: September 2018

Shape recoverable and ultralight materials have received significant attention for multifunctional applications, and emulate the performance found in natural materials.
Thermal stability of Sn anode material with non-aqueous electrolytes in sodium-ion batteries
Authors: Lee Yongho , Lim Hyojun , Kim Sang-Ok , Kim Hyung-Seok , Kim Ki Jae , Lee Kwan-Young , Choi Wonchang
Published: September 2018

The thermal behavior of fully lithiated and sodiated Sn electrodes cycled in a MePF6 (Me = Li or Na)-based electrolyte was studied using differential scanning calorimetry (DSC).
Quasi-parallel arrays with a 2D-on-2D structure for electrochemical supercapacitors
Authors: Guo Xiaolong , Wang Tian , Zheng Tian Xu , Xu Chaohe , Zhang Jintao , Zhang Yu Xin , Liu Xiao Ying , Dong Fan
Published: September 2018

We demonstrate a novel type of pseudocapacitive NiMn oxide@MnO2 quasi-parallel array assembled via 2D-on-2D structures.
A “MOFs plus MOFs” strategy toward Co–Mo2N tubes for efficient electrocatalytic overall water splitting
Authors: Shi Xia , Wu Aiping , Yan Haijing , Zhang Lin , Tian Chungui , Wang Lei , Fu Honggang
Published: September 2018

A “MOFs plus MOFs” strategy, including the first growth of ZIF-67 on 1-D Mo-MOFs followed by controllable nitridation, was developed to construct the tube-like Co–Mo2N hybrid. The hybrid can be used as an effective HER and OER catalyst for overall water splitting.
In situtunable bubble wettability with fast response induced by solution surface tension
Authors: Jiao Yunlong , Li Chuanzong , Lv Xiaodong , Zhang Yiyuan , Wu Sizhu , Chen Chao , Hu Yanlei , Li Jiawen , Wu Dong , Chu Jiaru
Published: September 2018

Underwater bubble wettability is attracting more and more research attention due to its important applications in the fields of water treatment, anti-fouling and drag-reduction.
Design and self-assembly of albumin nanoclusters as a dynamic-covalent targeting co-delivery and stimuli-responsive controlled release platform
Authors: Liu Wen , Dai Jian , Xue Wei
Published: September 2018

Stimuli-responsive nanomaterial-based drug delivery systems that are able to actively target the tumor microenvironment, enhance intratumoral accumulation and release drugs at target sites are attractive therapeutic platforms at present.
Islet encapsulation
Authors: Ernst Alexander Ulrich , Wang Long-Hai , Ma Minglin
Published: September 2018

Review of emerging advances and persisting challenges in the engineering and translation of islet encapsulation technologies.
Quantum dots tethered membrane type 3 matrix metalloproteinase-targeting peptide for tumor optical imaging
Authors: Ren Li , Li Qinglan , Ma Zheng , Wang Ye , Li Haolong , Shen Liqiao , Yu Jihong , Fang Xuexun
Published: September 2018

An MT3-MMP-targeting nanoprobe shows potential application for cancer diagnosis.
Discrimination of proteins through interaction with pyrene-labelled polymer aggregates
Authors: Kapf Andreas , Albrecht Marcel
Published: September 2018

A pyrene modified PDMAEMA (2-dimethylamino)ethyl methacrylate polymer was applied in the specific discrimination of metallo- and non-metalloproteins.
A pure red luminescent β-carboline-substituted biphenylmethyl radical: photophysics, stability and OLEDs
Authors: Abdurahman Alim , Chen Yingxin , Ai Xin , Ablikim Obolda , Gao Yu , Dong Shengzhi , Li Bao , Yang Bing , Zhang Ming , Li Feng
Published: September 2018

A novel stable room-temperature luminescent β-carboline-substituted biphenylmethyl radical with high luminescence efficiency and excellent OLED device performance.
Efficient anticorrelated variance reduction for stochastic simulation of biochemical reactions
Authors: Thanh Vo Hong
Published: September 2018

We investigate the computational challenge of improving the accuracy of the stochastic simulation estimation by inducing negative correlation through the anticorrelated variance reduction technique. A direct application of the technique to the stochastic simulation algorithm (SSA), employing the inverse transformation, is not efficient for simulating large networks because its computational cost is similar to the sum of independent simulation runs. We propose in this study a new algorithm that employs the propensity bounds of reactions, introduced recently in their rejection‐based SSA, to correlate and synchronise the trajectories during the simulation. The selection of reaction firings by our approach is exact due to the rejection‐based mechanism. In addition, by applying the anticorrelated variance technique to select reaction firings, our approach can induce substantial correlation between realisations, hence reducing the variance of the estimator. The computational advantage of our rejection‐based approach in comparison with the traditional inverse transformation is that it only needs to maintain a single data structure storing propensity bounds of reactions, which is updated infrequently, hence achieving better performance.
Influence of dynamics of development of open mining on technological features of blasting breaking
Authors: Zharikov Sergey , Kutuev Vyacheslav
Published: September 2018

The paper desribes the results of the analysis of the drilling and blasting index at some large enterprises. The significant period of their work has been considered. The increase in the specific consumption of explosives by years has been shown and the reasons for this increase have been explained. The issue of the development prospects of the drilling and blasting complex in terms of reducing the cost of explosives, as well as some issues associated with the use of explosives, manufactured on site. It is suggested that in the near future the development of open mining will be associated with the acceleration of processes and a significant increase in their intensity, both in the development of new ones and in the refinement of existing large open-pit mines. In this regard, drilling and blasting operations are waiting for certain changes in both the mechanization of processes and the technological methods of production. An approach is proposed for improving energy efficiency and resource saving in the production of drilling and blasting operations, which consists in applying a horizontal cut along the bottom of the bench with blasting breaking of the rock mass. It has been previously shown that the use of this method of breaking can be quite effective in comparison with the traditional approach.
Transportation of steam-water mixture during development of steam-water fields.
Authors: Shulyupin Alexander , Varlamova Natalia
Published: September 2018

The main problems of transporting the steam-water mixture revealed during steam-water fields development: pulsations of parameters at low flow rates and considerable hydraulic resistance at high flow rates. The domestic experience of the calculation of steam-water mixture pipelines, oriented to the dispersed-ring flow, is considered. Based on the analysis of domestic and foreign experience in the steam-water fields development, new challenges have been identified that make it urgent to develop scientific principles for the transport of steam-water mixture at low rates, taking into account modern concepts of the stability of steamwater flows.
The tasks of hydraulics of steam-water wells in the development of steam-hydrothermal fields
Authors: Chermoshentseva Alla , Shulyupin Alexander
Published: September 2018

Actual problems and prospects of practical development of geothermal fields are noted in the present work. The mathematical models for the calculation of flows in steam-water geothermal wells are described. The author's models cover the whole range of possible flow conditions.
Megalopolises geotechnics
Authors: Makarov Vladimir , Makishin Valery
Published: September 2018

Necessity of formation of the uniform concept of maintenance of development of the megalopolises, combining building of aboveground and underground complexes is shown. Interaction of elements of geotechnical system ≪a megalopolis - an underground construction≫ with a view of maintenance of ability to live of underground constructions of megalopolises is considered. Classification of conditions of development of megalopolises by stage of use of the underground space, added with criteria of reliability, safety and an economic optimum is developed. Conditions of maintenance of ecological compatibility and infrastructural appeal of megalopolises, as centres of cultural and commercial development are considered. Necessity of formation of the general scientific discipline ≪Megalopolises Geotechnics≫, covering a complex of methods of aboveground and underground building of megalopolises taking into account reliability and safety of functioning, ecological compatibility, infrastructural appeal, and also an economic optimality answering to criterion is formulated.
Concerning the capability of monitoring the condition of coal bed by tomography based upon the representation of object model using Chebyshev polynomials
Authors: Nazarova Larisa , Nazarov Leonid , Protasov Maxim , Panov Anton , Konichek Petr
Published: September 2018

3D geomechanical model of “Vorkutinskaia” mine, which allowed describing the development of stressed and deformed state of coal bed rock mass, has been developed and realized in numbers. Using empirical dependences of longitudinal waves velocity V on mean stressσ established by laboratory testing data, 3D distribution of V has been plotted. First arrival time tomography task, based upon the approximation of a bed geometrical model by Chebyshev polynomials, in order to give appraisal to the applicability for bed velocity structure reconstruction, has been analysed. With the use of data on dynamic events, registered by permanent stations, the object tomography has been prepared and 3D field of elastic waves velocities in highlighted part of area under study. It enables essential opportunity of stress state, if functions V (σ) for rocks building up the massif are known.
Multifractal analysis of electron images of fossil coal surface
Authors: Malinnikov Vasiliy , Zakharov Valeriy , Uchaev Denis , Uchaev Dmitry , Malinnikova Olga
Published: September 2018

The multifractal spectra of electronic images of fossil coal surfaces obtained from outburst-hazardous zones, outburst-nonhazardous (quiet) zones and outburst zones are studied. It is shown that the structural organization of coal surface elements can be represented by a multifractal with a corresponding f (α) -spectrum of fractal dimensions, which is suitable to determine quantitative difference in microstructures of coal specimens from outburst-hazardous and outburst-nonhazardous beds. Coals from outburst-hazardous and outburst-nonhazardous beds differ in the direction of skewness of multifractal spectra characterizing their surface structure. If the f (α) -spectrum is skewed to the right, then the analyzed coal specimen belongs to an outburst-hazardous bed, and on the contrary, if f (α) is skewed to the left, then it can be concluded that the coal specimen most likely belongs to an outburst-nonhazardous bed.
Estimation of the thermo-hydrodynamic parameters of the coolant in the Koshelev geothermal system
Authors: Mamaev Dmitry
Published: September 2018

The Koshelev geothermal system is located in the southern part of the Kamchatka Peninsula. On the surface, the system manifests itself by steam-hydrotherms at two thermal fields. Estimates of the predicted power from different data sources vary significantly, because the parameters of the coolant at great depths are not currently known and are presumable. Based on the available geological and geophysical data, a numerical threedimensional thermo-hydrodynamic model of the geothermal system has been developed. The model was calibrated according to thermometry data in exploratory wells. The calibrated model adequately describes the distribution of thermo-hydrodynamic parameters of the coolant in the system. It can be used to evaluate the coolant parameters during the development of the thermal resources of the Koshelev geothermal system. In the course of computational experiments, the developed model is used to obtain the distribution of the thermo-hydrodynamic parameters of the hydrothermal coolant in the geothermal system in the natural state and during the development of thermal resources.
Development of an electronic control module and research of dynamic and power characteristics of an electromagnetic hammer for destruction of boulders.
Authors: Vasin Konstantin , Yedygenov Yerik , Aldiyarov Nakhypbek , Voronin Vladimir
Published: September 2018

The developed electronic control module of an electromagnetic hammer for destruction of boulders is described and studied in the article. The possibility of using an inductive slot sensor for both controlling electromagnets and for measuring dynamic and energy characteristics is demonstrated. During the research of the possibility of controlling the impact energy of an electromagnetic hammer, the advantage of the method of adjusting the height of the lifting of the armature in relation to the method for controlling the magnitude of the electric current of the electromagnets is clarified.
Critically Stressed Areas of Earth’s Crust as Medium for Man-caused Hazards
Authors: Batugin Andrian
Published: September 2018

Despite advances in rockburst studies, suddenness of major geodynamic events is reported in a number of cases. Phenomenological tectonophysical model is suggested to explain some geodynamics phenomena. Prof. Petukhov I.M. suggested a concept: the Earth crust's critical stress condition is developed due to horizontal compressive forces and entrains rock strata from the sub-surface to a certain depth. The conditions that induced earthquake in 2013 at Bachat coal field in south west Kuzbass are considered in terms of critical stress developed in the top layer of the Earth crust. Estimates show that the size of the critical stress zone, produced presumably by interaction of huge (over 100 km) crustal blocks is at least 10km. Whereas critical stress zone is located in the top part of Earth's crust, mining operations in the pit including blast operations was making a direct impact on this area. Shallow occurrence of critical stress area and its size can provide insight into why mining works brought about induced earthquake with hypocenter at the depth of several kilometers. The conclusion has been made that regional areas of critical stress within rock massif developed as a result of crustal blocks interaction create hazard medium for mining.
Software and hardware improvement for the Streltsov ore field geodynamic testing area
Authors: Gladyr Andrei , Miroshnikov Vladimir , Konstantinov Alexander
Published: September 2018

For reliable forecasting and prevention of dangerous geodynamic phenomena in the Streltsov ore field area, the geodynamic testing area has been created. The geodynamic testing area includes modern measuring complexes that have different measurement methods and provide effective registration, and in-depth analysis of a wide range of geophysical wave fields changing in space and time. In the presence of anthropogenic seismicity, with the complication of the geomechanical and hydrological conditions of mining, the constant development of methods and means used at the geodynamic test site is required. It is necessary to install additional elements of a multi-level geomechanical monitoring system at sites in which dangerous geodynamic events are predicted and evidence of their reliable precursors. The modernization and integration of the measuring complexes of the geodynamic range into a multi-level geomechanical monitoring system allows to expand the controlled volume of the rock massif, to increase the quantity and quality of the information obtained about the state of the rock massif, which makes it possible to identify regional and local harbingers of dangerous dynamic phenomena and to justify a set of effective measures to reduce the level geodynamic risk improve the quality of forecast evaluation of geomechanical condition.
The research of remote earthquakes impact on the intensity of geomechanical processes in burst-hazardous rock massif
Authors: Lugovoi Vladimir , Rasskazov Igor , Tsoi Denis , Rasskazov Maksim , Sidliar Aleksandr
Published: September 2018

Brief summary of works on the detection of pendulum waves intensifying geomechanical processes in rock massif, with the application of high-sensitivity laser measurements, is represented in the article. Peculiarities and technical characteristics of laser deformograph applied as part of comprehensive geodynamic monitoring system in the area of “Streltsovskoe” ore field have been taken into consideration. The results of experimental research for the evaluation of remote earthquakes impact on the condition of rock massif of “Streltsovskoe” ore field, registration of remote earthquakes and their forerunners are given.
Investigation of regularities of brittle fracture formation around mine workings in overstressed rocks at the mines of Kirovsk branch of JSC «Apatit»
Authors: Korchak Pavel
Published: September 2018

The article is devoted to the investigation of brittle fracture formation in underground mines of Kirovsk branch of JSC “Apatit” by applying numerical simulation and subsequent comparison with the results of field data. It includes the results of studies of rock failure forms with different directions, values and stress ratio, as well as the measures to reduce stress by drilling relief holes. Brittle fracturing and dependencies of its formation based on many factors, including mining, geological and geomechanical factors were researched. The results serve as the basis for the next research aimed at searching and grounding the effective ways to stabilize mine tunnels in case of brittle fracturing.
Processing of refractory gold sulphide carbonbearing ores by means of their pre-oxidation with water-and-gas emulsions prepared in electrochemical and photochemical reactors
Authors: Sekisov Artur , Korpi Paul , Rasskazova Anna , Litvinova Natalia , Konareva Tatiana
Published: September 2018

In connection with the depletion of mineral resources base of gold, the engagement of refractory ores reserves in the processing becomes a necessary condition to stabilize gold market. Standard methods of processing of refractory sulphide carbon-bearing gold ores and float concentrates extracted from them include pressure oxidation and bacterial oxidation enabling the liberation of dispersive gold and oxidation of carbon having parasitical sorption with further cyanation. The alternative solution of the aforementioned problem is pre-oxidation of refractory ores with water-and-gas emulsions. Theoretical basis for active water-and-gas emulsions formation with the use of electrolytes solutions electrolysis in combination with ultraviolet exposure is stated in the article. Given method of water-and-gas emulsions preparation ensures the formation of active oxidants complex. Gold recovery into pregnant solutions up to 55.7 - 73.5% by chloride scheme was reached in laboratory experiments on samples of sulphide carbon-bearing ore, herewith 18% was recovered using cyanic solution. Based upon experimental findings, process scheme for combined oxidative preparation of sulphide carbon-bearing ore with dispersive deportment of gold was developed.
The prospects for secondary processing of tailings remained after the beneficiation of fluorite ores of Primorye Krai using a highly selective combination of reagents
Authors: Kienko Lidiya , Voronova Olga
Published: September 2018

The study of the composition and preparability of two samples of tailings dumped at the Yaroslavl Mining Company revealed the following contents: CaF2 - 15.2 and 20.7%, CaCO3 - 13.3 and 10.2%, and Zn - 0.49 and 0.38%. The volume of the stockpiled wastes is estimated at 30 million tons. The need for fine material grinding at the stage of preparation for flotation was shown, and the efficient fluorite concentration was possible with technical solutions found. The determined optimal parameters of the flotation acid-base condition provided neutralization of the negative influence of salts and slimes left by the previous processing cycle. It has been established that a mixture of ammonium and lignosulfonates was effective as a modifier. The extraction of sample 1 yielded 52% of fluorite extraction to the concentrates with 92.2-92.8% fluorite content, and more than 69% when beneficiating the sample 2. Upgrading of the concentrate quality is only possible through transferring to flotation tails of the most contaminated fluorite grains impregnated with silicate minerals, but this is followed by a significant extraction reduction. The concentration of sphalerite to a separate product occurs with low effectiveness. The inclusion of sulfide flotation in the circuit head can improve the fluorite cycle efficiency: extraction of CaF2 to the concentrates of FF-92 brand may reach 70%.
Synthesis scheelite concentrate electroslag remelting for receiving tungsten steel
Authors: Kuzmichev Evgeny , Nikolenko Sergey
Published: September 2018

This article investigates the influence of various reducers of tungsten from a scheelite concentrate on a complex alloying of melted lowcarbonaceous steel by tungsten through an oxides slag system. By electroslag remelting of low-carbon steel using ceramic fluxes on the basis of mineral associations are received high-alloyed by tungsten (to 20 wt%).
Sorting out of Gusevogorsk deposit titaniferous magnetite ore by technological types by methods of geoinformation modeling and preliminary estimation of their washability
Authors: Kornilkov Sergey , Kantemirov Valery , Yakovlev Andrey , Titov Roman
Published: September 2018

A more complete and complex extraction of valuable components in the development of mineral resources is achieved through the separation of technological types and grades of ores, their separate extraction and processing, which allows to increase the yield, quality and nomenclature of commercial products and to raise the economic efficiency of the extraction and preparation processes. An important element of the separate processing of types of ores is the technology used for their zoning by grades in the open-pit space. Innovative direction in the development of the forecast of quality and preparation characteristics of mineral resources is the methods of geoinformation modeling with the use of Geological and Mining Information System technologies. The paper describes the technique of modeling and separation of ores into technological grades on the example of the Gusevogorskoye deposit of titanomagnetites, and presents the method of express ore preparability analysis with the estimation of the degree of contrast of qualitative characteristics.
Complex processing of titanium-rare metal raw material
Authors: Medkov Mikhail , Krysenko Galina , Epov Dantiy , Sitnik Pavel , Avramenko Valentin
Published: September 2018

The paper is devoted to investigation of the complex processing of titanium-rare metal raw materials with ammonium hydrodifluoride. It is stated that fluorination of the main components of the mineral raw materials with ammonium hydrodifluoride proceeds with formation of complex ammonium fluorometallates and simple fluorides. It is showed that in the process of aqueous leaching of the fluorinated mineral raw material niobium and tantalum completely pass into solution together with titanium, iron, and silicon fluoroammonium salts while all the rare-earth elements stay in the insoluble residue as complex fluorosodium salts together with CaF2. The method of separation of the fluoroammonium salts with obtaining marketable products and isolation of the rare-earth elements from the insoluble residue is offered.
Mechanical-chemical activation using solutions containing active oxygen species
Authors: Aleksandrov Aleksandr , Litvinova Natalya , Konareva Tatyana , Bogomyakov Roman , Lavrik Natalya
Published: September 2018

The experimental studies of gold leaching from the cyanidation cakes for one of the Far East region deposits is shown in the article. Carbonate-cyanide and hypochlorite-chloride reagents were used for leaching and were electro-photo activated before leaching. Preoxidation of mineral matter by sulfate-peroxide solution were carried out. The mechanical-chemical activation of mineral material was carried out for gold increased extraction. Mechanical activation provided both better cake grinding and formation of micro cracks in the quartz and adular grains. The impact provides the liberation of dispersed nano-sized gold. The change in the granulometric characteristics of initial samples was considered from the upper, middle and lower horizons of the tailing dump as a result of complex physical-chemical effects. It was established that the gold reprecipitated on new activated surfaces of quartz and clay-mica minerals during the leaching process (for the samples of the lower and middle tailing horizons). Carbon in pulp (CIP) technology after the first stage of mechanical activation ensures a loss reduction of the valuable component.
Experimental research on the formation of mineral-rich areas in residue gold placer deposits
Authors: Alexeev Vladimir , Banshchikova Tamara
Published: September 2018

Underestimation of the reserves of raw material base of gold mining (namely residue dump complexes) leads to negative social and economic consequences in the regions engaged in placer gold mining. Nonetheless, their efficient development is possible only through the use of new rational technologies of preparation and deep processing of rock mass for subsequent extraction of valuable minerals. In order to create such a technology, large-scale research was made on the nature and degree of the influence that the basic factors of the technology have on the process of migration and concentration of gold particles in a residue rock mass.
Integration of production as a way to improve the financial stability of non-ferrous metallurgy enterprises in the Far Eastern region of Russia
Authors: Arkhipova Yuliya
Published: September 2018

Article is devoted to a question of financial and economic stability of the enterprises. Uncertainty and instability of the external environment can lead to a slowdown in economic growth, to a decline in production and reduction of investment. In recent years, problems of financial instability and bankruptcy have grown into a category of economic security of the country. Annually for these reasons, thousands of businesses cease operations, which has a negative impact on the social and economic situation of the regions. The article examines the theoretical and methodological tools of financial stability of economic entities as an indicator of the effectiveness of the financial management system in commercial organizations. This is ensured by permanent solvency by maintaining a sufficient level of liquidity of assets (finished goods, receivables, short-term financial investments, etc.). The author made attempts to create a methodology for assessing the financial and economic sustainability of mining companies in the Far Eastern region that are engaged in the extraction and processing of non-ferrous metal ores in order to avoid their bankruptcy and as an exit - merger into a vertically integrated company. This will allow to connect the technological cycle at individual enterprises: from the extraction of raw materials and its processing to the production of high-value products and to increase their competitiveness both on the Russian market and on the world market.
Consolidation of small and medium mining business in the gold mining industry of the Russian Far East
Authors: Kradenykh Irina
Published: September 2018

The gold mining industry of the Russian Far East has a great development potential, whose economic growth largely depends on the efficiency of developing a unique mineral resource base. To do this, it is necessary to solve a number of tasks, including the management and organization of economic activities of enterprises engaged in the extraction of placer gold in medium and small volumes. Gold mining companies themselves positively assess the prospects for the development of the industry, despite the preservation of external restrictions imposed by Western countries. At the same time, the current position of the modern gold mining industry is determined not only by the state of the Russian economy, but also by a number of branch features related to the management of gold mining at the enterprise level. At the present time, there are increasing questions about the feasibility of consolidation of small and medium mining enterprises, which will allow them to overcome current trends in the economic development of the industry, by combining their own resources. At the same time, in practice, reverse phenomena are observed, indicating that the industry is segmented and the number of mining companies developing placer deposits is gradually increasing. However, consolidation processes, in the form of integration associations, represent one of the directions of development and effective functioning of Russian gold mining enterprises, therefore they require comprehensive research and remain relevant.
Process chains in the development of remote deposits of the North
Authors: Gavrilov Vladimir , Fyodorov Vladislav
Published: September 2018

The low level of development of remote northern regions of Russia predetermines a very high dependence of the mining and processing enterprises of that area on the import of material and technical resources and the export of products obtained after mining. Infrastructural restrictions and a continuous increase in the costs of goods and services, often outstripping the growth of prices for mineral wealth, increase the risks in the implementation of investment projects and worsen their economic performance. The results of an analysis of long, complex and multi-link process chains formed by mining enterprises of the polar regions of Yakutia are presented. The procedure of supply, extraction, logistics and primary processing of mineral wealth requires improvement. It is shown that mining enterprises by volume and type of output can be divided into four groups. On the basis of a comprehensive review of the factors of external and internal environment, proposals are formulated to improve the management of the delivery of cargos and delivery of finished products within supply chains. The prerequisites for replacing part of the delivered fuel and energy resources with local coal are considered.