bluuebunny/crossref_metadata_2025 huggingface dataset:
Response of surface ozone over the continental United States to UV radiation declines from the expected recovery of stratospheric ozone
Authors: Hodzic A. , Madronich S.
Published: September 2018

The response of surface ozone concentrations to decreases in ultraviolet (UV) radiation that are expected from the recovery of stratospheric ozone by the end of the twenty-first century is examined with the regional WRF–Chem model. The study is performed over the continental United States for the summer of 2010 at 12 km horizontal resolution which, compared to previous studies, allows a better separation of chemical regimes that exhibit opposite responses to UV radiation changes. Our results show that on the regional scale, surface ozone is expected to increase by 0.5 to 1 ppb due to its slower destruction, while the opposite can be seen in the vicinity of some urban centers where ozone concentrations could decrease by up to 1 ppb due to its slower photochemical production. Geographic overlay with population shows however a relatively small net increase in exposure of ~ 0.4 ppb, with an asymmetric distribution characterized by some disbenefit to the majority of the US population and a benefit to a relatively small fraction (~4%) of population.
Accessible and distinct decoquinate derivatives active against Mycobacterium tuberculosis and apicomplexan parasites
Authors: Beteck Richard M. , Seldon Ronnett , Coertzen Dina , van der Watt Mariëtte E. , Reader Janette , Mackenzie Jared S. , Lamprecht Dirk A. , Abraham Matthew , Eribez Korina , Müller Joachim , Rui Feng , Zhu Guang , de Grano Ruel Valerio , Williams Ian D. , Smit Frans J. , Steyn Adrie J. C. , Winzeler Elizabeth A. , Hemphill Andrew , Birkholtz Lyn-Marie , Warner Digby F. , N’Da David D. , Haynes Richard K.
Published: September 2018

The quinolone decoquinate is coadministered with feed for treatment of parasites which cause coccidiosis in poultry. However, from a drug-development perspective, the biological activity is often not adequately exploited due to poor physicochemical properties. Here we convert decoquinate into N-alkyl quinolone amides that, in contrast to decoquinate, are active against the tuberculosis bacterium with MIC90 values ranging from 1.4 to 3.64 µM, and quinoline O-carbamates active against apicomplexan parasites that cause malaria, toxoplasmosis, and neosporosis with IC50 values of 0.32–1.5 nM for the best derivative. Uniquely for the TB-active amides, disruption of cell wall homoeostasis is identified as one target. With IC50 values against fetal lung fibroblast cells of 40 to >100 μM, the derivatives are selective for the pathogens. Structures of the most active derivatives are determined by NMR spectroscopy and X-ray crystallography. Analogues lacking the decyl side chain of decoquinate are inactive.
Raman spectroscopy as a novel tool for fast characterization of the chemical composition of perivascular adipose tissue
Authors: Czamara Krzysztof , Majka Zuzanna , Fus Aleksandra , Matjasik Kamila , Pacia Marta Z. , Sternak Magdalena , Chlopicki Stefan , Kaczor Agnieszka
Published: September 2018

One of the new targets of untapped therapeutic potential is perivascular adipose tissue (pVAT). Based on Raman spectroscopy we demonstrated that the lipid unsaturation degree was clearly distinct in various types of adipose tissues, in particular thoracic and abdominal pVATs, and was influenced by the age of animals.
Bimetallic metal organic frameworks with precisely positioned metal centers for efficient H2 storage
Authors: Kim Daeok , Song Kyung Seob , Buyukcakir Onur , Yildirim Taner , Coskun Ali
Published: September 2018

Predesigned metal clusters for ordered heterogeneity in MOFs.
Beta-galactosidase-responsive synthetic biomarker for targeted tumor detection
Authors: Nishihara Tatsuya , Kuno Satoshi , Nonaka Hiroshi , Tabata Sho , Saito Natsumi , Fukuda Shinji , Tomita Masaru , Sando Shinsuke , Soga Tomoyoshi
Published: September 2018

Tumor biomarkers are highly desirable for the screening of patients with a risk of tumor development and progression.
High performance sorption and desorption behaviours at high working temperatures of ammonia gas in a cobalt-substituted Prussian blue analogue
Authors: Jiang Yong , Takahashi Akira , Kawamoto Tohru , Asai Miyuki , Zhang Nan , Lei Zhongfang , Zhang Zhenya , Kojima Keisuke , Imoto Kenta , Nakagawa Kosuke , Ohkoshi Shin-ichi , Nakamura Tohru
Published: September 2018

Cobalt hexacyanocobaltate (CoII3[Coiii(CN)6]2) was proved to have good sorption even at high temperatures, with thermal recyclability in sorption–desorption cycles.
The cyclo-Sb6 ring in the [Sb6(RuCp*)2]2− ion
Authors: Wang Yi , Zavalij Peter , Eichhorn Bryan
Published: September 2018

The [Sb6(RuCp*)2]2− anion represents the first example of a Zintl cluster with a boat-like cyclo-Sb6 subunit and the first ruthenium polyantimonide complex. The anion is dynamic in solution and fragments in the gas phase. Structural parameters and DFT calculations suggest the possibility of SbSb double bond character.
Exploring the potential and design of zeolite nanosheets as pervaporation membranes for ethanol extraction
Authors: Zou Changlong , Lin Li-Chiang
Published: September 2018

Demonstrate the potential of zeolite nanosheets as pervaporation membranes for ethanol extraction and shed light on their key design components.
Asymmetric synthesisviastereospecific C–N and C–O bond activation of alkyl amine and alcohol derivatives
Authors: Pound Sarah M. , Watson Mary P.
Published: September 2018

Stereospecific, nickel-catalyzed cross-couplings of alkyl ammonium salts and carboxylates enable preparation of highly enantioenriched products with tertiary and quaternary stereocenters.
Kinetics during hydrothermal synthesis of nanosized KxNa1−xNbO3
Authors: Skjærvø Susanne Linn , Wells Kristin H. , van Beek Wouter , Grande Tor , Einarsrud Mari-Ann
Published: September 2018

In situ techniques are powerful for providing insight into the determining factors when preparing KxNa1−xNbO3 nanoparticles with a designed composition, structure and size.
Temperature-dependent 3D structures of lanthanide coordination polymers based on dicarboxylate mixed ligands
Authors: Chainok Kittipong , Ponjan Nutcha , Theppitak Chatphorn , Khemthong Phailyn , Kielar Filip , Dungkaew Winya , Zhou Yan , Batten Stuart R.
Published: September 2018

Four families of fourteen three-dimensional (3D) lanthanide coordination polymers (CPs) with dicarboxylate mixed ligands have been synthesized hydrothermally at different temperatures.
Influence of Mn co-doping on the magnetic properties of planar arrays of GaxFe4−xN nanocrystals in a GaN matrix
Authors: Del Bianco L. , Spizzo F. , Li Tian , Adhikari R. , Bonanni A.
Published: September 2018

Mn co-doping affects the formation of iron nitride nanocrystals in a GaN matrix, determining the system's structural and magnetic properties.
Rationally designing mixed Cu–(μ-O)–M (M = Cu, Ag, Zn, Au) centers over zeolite materials with high catalytic activity towards methane activation
Authors: Wang Guiru , Huang Ling , Chen Wei , Zhou Jian , Zheng Anmin
Published: September 2018

The direct conversion of methane to methanol on [Cu(μ-O)M]2+ (M = Cu, Ag, Zn, Au) bimetal centers in ZSM-5 zeolite is investigated using periodic DFT for the first time.
First principles studies of the interactions between alkali metal elements and oxygen-passivated nanopores in graphene
Authors: Heath Jonathan J. , Kuroda Marcelo A.
Published: September 2018

We characterize the structure–property relationship of alkali metal elements in oxygen-passivated graphene pores using the density functional theory. We identify common trends in these systems based on their structural and electronic properties.
Factors affecting cyclic durability of all-solid-state lithium batteries using poly(ethylene oxide)-based polymer electrolytes and recommendations to achieve improved performance
Authors: Faglioni Francesco , Merinov Boris V. , Goddard William A. , Kozinsky Boris
Published: September 2018

We compute the likely reaction path for LiTFSI/PEO electrolyte decomposition, as observed in Li-metal batteries.
Competitor analysis of functional group H-bond donor and acceptor properties using the Cambridge Structural Database
Authors: McKenzie James , Hunter Christopher A.
Published: September 2018

The CSD can be used to obtain a reliable quantitative ranking of the H-bond properties of organic functional groups provided each crystal structure is individually analysed as the result of a competition between all of the functional groups present for H-bond formation.
A nanoscale study of the negative strain rate dependency of the strength of metallic glasses by molecular dynamics simulations
Authors: Yang Liuqing , Fan Jitang , Vu-Bac Nam , Rabczuk Timon
Published: September 2018

Compressive strength and deformation characteristics of a metallic glassy alloy related to strain rate are studied by molecular dynamics simulations.
Manipulation of spin and magnetic anisotropy in bilayer magnetic molecular junctions
Authors: Wang Yu , Li Xiaoguang , Zheng Xiao , Yang Jinlong
Published: September 2018

The Kondo effect and magnetic anisotropy in bilayer TMPc/TMPc/Pb(111) junctions can be actively tuned by changing the intermediate decoupling layer.
Correction: Topological behaviour of ternary non-symmorphic crystals KZnX (X = P, As, Sb) under pressure and strain: a first principles study
Authors: Parveen Atahar , Rao E. Narsimha , Adivaiah B. , Anees P. , Vaitheeswaran G.
Published: September 2018

Correction for ‘Topological behaviour of ternary non-symmorphic crystals KZnX (X = P, As, Sb) under pressure and strain: a first principles study’ by Atahar Parveen et al., Phys. Chem. Chem. Phys., 2018, 20, 5084–5102.
Crown-substituted naphthalocyanines: synthesis and supramolecular control over aggregation and photophysical properties
Authors: Safonova Evgeniya A. , Polovkova Marina A. , Martynov Alexander G. , Gorbunova Yulia G. , Tsivadze Aslan Yu.
Published: September 2018

Aggregation and photophysics of crown-substituted naphthalocyanines can be controlled by reversible cation-induced supramolecular assembling.
Inhibition by microbial metabolites of Chinese dark tea of age-related neurodegenerative disorders in senescence-accelerated mouse prone 8 (SAMP8) mice
Authors: Cai Shuxian , Yang Heng , Wen Beibei , Zhu Kun , Zheng Xin , Huang Jianan , Wang Yingzi , Liu Zhonghua , Tu Pengfei
Published: September 2018

The microbial metabolite CDT-2 has a good protective effect on neurons by decreasing the oxidative-aggregate cycle in senescence-accelerated mouse prone 8 (SAMP8) mice.
Potential of iturins as functional agents: safe, probiotic, and cytotoxic to cancer cells
Authors: Zhao Haobin , Li Junjun , Zhang Yawen , Lei Shuzhen , Zhao Xixi , Shao Dongyan , Jiang Chunmei , Shi Junling , Sun Hui
Published: September 2018

Iturins are safe for oral administration, increase the abundance of probiotics, and reduce fat intake by regulating the intestinal microflora.
Anatomical redistribution of endogenous copper in embryonic mice overexpressing SOD1
Authors: Kysenius K. , Hilton J. B. , Paul B. , Hare D. J. , Crouch P. J.
Published: September 2018

Detailed quantitativein situimaging of embryonic mice reveals overt Cu redistribution associated with SOD1-overexpression.
miRNA-182-5p, via HIF2α, contributes to arsenic carcinogenesis: evidence from human renal epithelial cells
Authors: Fang Xin , Sun Ru , Hu Yuxin , Wang Huihui , Guo Yi , Yang Bei , Pi Jingbo , Xu Yuanyuan
Published: September 2018

Overexpression of HIF2α via miR-182-5p suppression is involved in arsenic-induced malignant transformation of human renal epithelial cells.
Charge injection and transport properties of large area organic junctions based on aryl thin films covalently attached to a multilayer graphene electrode
Authors: Barraud Clément , Lemaitre Matthieu , Bonnet Roméo , Rastikian Jacko , Salhani Chloé , Lau Stéphanie , van Nguyen Quyen , Decorse Philippe , Lacroix Jean-Christophe , Della Rocca Maria Luisa , Lafarge Philippe , Martin Pascal
Published: September 2018

Charge transport in graphene based organic rectifier.
Structural assembly from 1D to 3D motivated by the linear co-ligands, and the magnetic and photocatalytic properties of five NiII coordination polymers with 5-(4′-carboxylphenyl)nicotinic acid
Authors: Wang Zhixiang , Ren Yixia , Cao Jia , Tang Long , Zhang Meili , Zhou Shanhong
Published: September 2018

Five structural diversity nickel(ii) complexes based on 5-(4′-carboxylphenyl) nicotinic acid and linear co-ligands are described. The antiferromagnetic interactions exist in them expect for 2. All of them could accelerate the degradation rate of MO under visible light irradiation.
Synergetic effects of ligand exchange and reduction process enhancing both electrical and optical properties of Ag nanocrystals for multifunctional transparent electrodes
Authors: Kang Min Su , Joh Hyungmok , Kim Haneun , Yun Hye-Won , Kim Donggyu , Woo Ho Kun , Lee Woo Seok , Hong Sung-Hoon , Oh Soong Ju
Published: September 2018

We introduce a chemical process to fabricate nanocrystal based transparent electrodes with enhanced electronic and optical properties.
Hexa-functional tumour-seeking nano voyagers and annihilators for synergistic cancer theranostic applications
Authors: Ramachandra Kurup Sasikala Arathyram , Unnithan Afeesh Rajan , Thomas Reju George , Batgerel Tumurbaatar , Jeong Yong Yeon , Park Chan Hee , Kim Cheol Sang
Published: September 2018

A hexa-functional tumor seeking smart magnetic nanocomposite is reported for its application in highly noninvasive cancer theranostics.
Large tunneling magnetoresistance in magnetic tunneling junctions based on two-dimensional CrX3 (X = Br, I) monolayers
Authors: Pan Longfei , Huang Le , Zhong Mianzeng , Jiang Xiang-Wei , Deng Hui-Xiong , Li Jingbo , Xia Jian-Bai , Wei Zhongming
Published: September 2018

The large tunneling magnetoresistance (TMR) effect was observed in magnetic tunneling junctions (MTJs), which have atomic thickness because of the use of two-dimensional ferromagnetic CrX3 (X = Br, I) monolayers.
Electrophilic chloro(ω-alkoxy)lation of alkenes employing 1-chloro-1,2-benziodoxol-3-one: facile synthesis of β-chloroethers
Authors: Jia Yimin , Chen Long , Zhang Huaibin , Zheng Ying , Jiang Zhong-Xing , Yang Zhigang
Published: September 2018

A four-component method for the electrophilic chloro(ω-alkoxy)lation of alkenes has been performed employing cyclic ethers, thionyl chloride, and chloroiodine(iii) reagent.
Aminative Umpolung cyclization for synthesis of chiral exocyclic vicinal diamines
Authors: Liu Feng , Zhao Guoqing , Cai Weiqi , Xu Dongfang , Zhao Baoguo
Published: September 2018

Chiral exocyclic vicinal trans-diamines were efficiently synthesized from aldehyde-imines via decarboxylative aminative Umpolung cyclization strategy.
An alternative route for the synthesis of hydroxylated pillar[5]arene-based amphiphiles
Authors: Al-Azemi Talal F. , Vinodh Mickey , Alipour Fatemeh H. , Mohamod Abdirahman A.
Published: September 2018

Hydroxylated pillar[5]arene-based amphiphiles were synthesized by a co-cyclization strategy followed by catalytic hydrogenation. This approach unlocks the synthesis and the design of a wide range of structural manipulations to these amphiphilic pillararenes.
Ag modified bismuth ferrite nanospheres as a chlorine gas sensor
Authors: Li Qiang , Zhang Weiming , Wang Chao , Ma Jiangwei , Ning Li , Fan Huiqing
Published: September 2018

Cl2 sensing properties were remarkably enhanced for Ag modified BFO nanospheres.
Correction: Role of annealing temperature on the sol–gel synthesis of VO2 nanowires with in situ characterization of their metal–insulator transition
Authors: Jo Y.-R. , Myeong S.-H. , Kim B.-J.
Published: September 2018

Correction for ‘Role of annealing temperature on the sol–gel synthesis of VO2 nanowires with in situ characterization of their metal–insulator transition’ by Y.-R. Jo et al., RSC Adv., 2018, 8, 5158–5165.
Synergistic optimization of carrier transport and thermal conductivity in Sn-doped Cu2Te
Authors: Qiu Yuchong , Liu Ying , Ye Jinwen , Li Jun , Lian Lixian
Published: September 2018

Doping Sn into the Cu2Te lattice can synergistically enhance the power factor and decrease thermal conductivity, leading to remarkably optimized zTs. The lone pair electrons from the 5s orbital of Sn can increase the DOS near the Fermi level of Cu2Te to promote PF and reduce κe by decreasing the carrier concentration. This study explores a scalable strategy to optimize the thermoelectric performance for intrinsically highly degenerate semiconductors.
Transition metal modification and carbon vacancy promoted Cr2CO2(MXenes): a new opportunity for a highly active catalyst for the hydrogen evolution reaction
Authors: Cheng Yu-Wen , Dai Jian-Hong , Zhang Yu-Min , Song Yan
Published: September 2018

Transition metal (TM) modification and carbon vacancy engineering promoted the hydrogen evolution reaction (HER) catalytic activity of Cr2CO2.
Enhanced electrocatalytic activity by chemical nitridation of two-dimensional titanium carbide MXene for hydrogen evolution
Authors: Yoon Yeoheung , Tiwari Anand P. , Lee Minhe , Choi Min , Song Wooseok , Im Jino , Zyung Taehyoung , Jung Ha-Kyun , Lee Sun Sook , Jeon Seokwoo , An Ki-Seok
Published: September 2018

We report a strategy to turn non-electrocatalytic 2D-titanium carbide MXene (Ti2CTx) into a highly active electrocatalyst by nitridation with sodium amide (NaNH2).
Fabric-based self-powered noncontact smart gloves for gesture recognition
Authors: Wu Hanxiang , Guo Hang , Su Zongming , Shi Mayue , Chen Xuexian , Cheng Xiaoliang , Han Mengdi , Zhang Haixia
Published: September 2018

With flexibility, compatibility, and low electrode numbers, the smart gloves provide excellent sensing ability and interaction experience in gesture recognition.
Thalidomide-type teratogenicity: structure–activity relationships for congeners
Authors: Smith R. L. , Mitchell S. C.
Published: September 2018

Unravelling the molecular basis of thalidomide embryotoxicity, which is remarkably species–specific, is challenging in view of its low toxicity in the mature animal. Employing data derived solely from proven sensitive primate species or susceptible strains of rabbit, the structure–activity relationship of over 50 compounds which are, arguably, congeners of thalidomide has been reviewed. The molecular requirement for ‘thalidomide-type’ teratogenicity was highly structure dependent. Both the phthalimide and glutarimide groups were essential for embryopathic activity, although minor substitutions in either or both rings could be tolerated without a loss of toxicity. An α-linkage between the two cyclic structures was essential; a β-link resulted in a complete loss of embryopathic activity. Crucially, this α-configuration provided a centre of asymmetry enabling the existence of stereoisomers. The thalidomide molecule is not a static entity and under physiological conditions it undergoes a number of intra- and inter-molecular reactions. Besides irreversible hydrolysis, its keto–enol tautomerism, base-assisted proton transfer and glutarimide ring rotation lead to rapid interconversion of the thalidomide enantiomers. These enantiomers form equilibria between themselves and also between both homochiral and heterochiral dimers. It is proposed that the more energetically favourable and stable heterochiral dimer of thalidomide is an active agent that possesses the structural features of the paired nucleotides of the double-stranded DNA. Its capacity to enter into hydrogen bonding interactions affects DNA expression in a chaotic manner without causing permanent mutations. This disruption may well be concentrated at nucleotide sites known to be involved in specific promoter regions of the genome.
Method for planning a wind–solar–battery hybrid power plant with optimal generation‐demand matching
Authors: Khalid Muhammad , AlMuhaini Mohammed , Aguilera Ricardo P. , Savkin Andrey V.
Published: September 2018

This study aims to propose a methodology for a hybrid wind–solar power plant with the optimal contribution of renewable energy resources supported by battery energy storage technology. The motivating factor behind the hybrid solar–wind power system design is the fact that both solar and wind power exhibit complementary power profiles. Advantageous combination of wind and solar with optimal ratio will lead to clear benefits for hybrid wind–solar power plants such as smoothing of intermittent power, higher reliability, and availability. However, the potential challenges for its integration into electricity grids cannot be neglected. A potential solution is to utilise one of the energy storage technologies, though all of them are still very expensive for such applications, especially at large scale. Therefore, optimal capacity calculations for energy storage system are also vital to realise full benefits. Currently, battery energy storage technology is considered as one of the most promising choices for renewable power applications. This research targets at battery storage technology and proposes a generic methodology for optimal capacity calculations for the proposed hybrid wind–solar power system.
Control of depth of anaesthesia using fractional‐order adaptive high‐gain controller
Authors: Boroujerdi Alavi Maryam , Tabatabaei Mohammad
Published: September 2018

This study presents a fractional‐order adaptive high‐gain controller for control of depth of anaesthesia. To determine the depth of anaesthesia, the bispectral index (BIS) is utilised. To attain the desired BIS, the propofol infusion rate (as the control signal) should be appropriately adjusted. The effect of the propofol on the human body is modelled with the pharmacokinetic–pharmacodynamic (PK/PD) model. Physical properties of the patient such as gender, age, height and a like determine the parameters of the PK/PD model. This necessitates us to employ an appropriate adaptive controller. To attain this goal, a fractional‐order adaptive high‐gain controller is constructed to solve the tracking problem for minimum phase systems with relative degree two (such as the PK/PD model). This leads to a time‐varying gain adjusting according to a fractional‐order adaptation mechanism. Simulation results performed on various patients (considering the external disturbance and the measurement noise) show the effectiveness of the proposed method.
Unveiling the environment and faint features of the isolated galaxy CIG 96 with deep optical and HI observations
Authors: Ramírez-Moreta P. , Verdes-Montenegro L. , Blasco-Herrera J. , Leon S. , Venhola A. , Yun M. , Peris V. , Peletier R. , Verdoes Kleijn G. , Unda-Sanzana E. , Espada D. , Bosma A. , Athanassoula E. , Argudo-Fernández M. , Sabater J. , Muñoz-Mateos J. C. , Jones M. G. , Huchtmeier W. , Ruiz J. E. , Iglesias-Páramo J. , Fernández-Lorenzo M. , Beckman J. , Sánchez-Expósito S. , Garrido J.
Published: September 2018

Context. Asymmetries in atomic hydrogen (HI) in galaxies are often caused by the interaction with close companions, making isolated galaxies an ideal framework to study secular evolution. The AMIGA project has demonstrated that isolated galaxies show the lowest level of asymmetry in their HI integrated profiles compared to even field galaxies, yet some present significant asymmetries. CIG 96 (NGC 864) is a representative case reaching a 16% level.

Aims. Our aim is to investigate the HI asymmetries of the spiral galaxy CIG 96 and what processes have triggered the star-forming regions observed in the XUV pseudo-ring.

Methods. We performed deep optical observations at CAHA1.23m, CAHA2.2m and VST (OmegaCAM wide-field camera) telescopes. We reach surface brightness (SB) limits of μCAHA2.2m = 27.5 mag arcsec−2 (Cousins R) and μVST = 28.7 mag arcsec−2 (SDSS r) that show the XUV pseudo-ring of the galaxy in detail. Additionally, a wavelet filtering of the HI data cube from our deep observations with VLA/EVLA telescope allowed us to reach a column density of NHI = 8.9 × 1018 cm−2 (5σ) (28″ × 28″ beam), lower than in any isolated galaxy.

Results. We confirm that the HI of CIG 96 extends farther than 4 × r25 in all directions. Furthermore, we detect for the first time two gaseous structures (∼106 M⊙) in the outskirts. The SDSS g - r colour index image from CAHA1.23m shows extremely blue colours in certain regions of the pseudo-ring where NHI > 8.5 × 1020 cm−2, whereas the rest show red colours. Galactic cirrus contaminate the field, setting an unavoidable detection limit at 28.5 mag arcsec−2 (SDSS r).

Conclusions. At the current SB and NHI levels, we detect no stellar link within 1° × 1° or gaseous link within 40′ × 40′ between CIG 96 and any companion. The isolation criteria rule out interactions with other similar-sized galaxies for at least ∼2.7 Gyr. Using existing stellar evolution models, the age of the pseudo-ring is estimated at 1 Gyr or older. Undetected previously accreted companions and cold gas accretion remain as the main hypothesis to explain the optical pseudo-ring and HI features of CIG 96.
Diffuse interstellar bands in the H II region M17
Authors: Ramírez-Tannus M. C. , Cox N. L. J. , Kaper L. , de Koter A.
Published: September 2018

Context. Diffuse interstellar bands (DIBs) are broad absorption features measured in sightlines probing the diffuse interstellar medium. Although large carbon-bearing molecules have been proposed as the carriers producing DIBs, their identity remains unknown. DIBs make an important contribution to the extinction curve; the sightline to the young massive star-forming region M17 shows anomalous extinction in the sense that the total-to-selective extinction parameter (RV) differs significantly from the average Galactic value and may reach values RV > 4. Anomalous DIBs have been reported in the sightline towards Herschel 36 (RV = 5.5), in the massive star-forming region M8. Higher values of RV have been associated with a relatively higher fraction of large dust grains in the line of sight.

Aims. Given the high RV values, we investigate whether the DIBs in sightlines towards young OB stars in M17 show a peculiar behaviour.

Methods. We measure the properties of the most prominent DIBs in M17 and study these as a function of E(B–V) and RV. We also analyse the gaseous and dust components contributing to the interstellar extinction.

Results. The DIB strengths in M17 concur with the observed relations between DIB equivalent width and reddening E(B–V) in Galactic sightlines. For several DIBs we discover a linear relation between the normalised DIB strength EW/AV and RV−1. These trends suggest two groups of DIBs: (i) a group of ten moderately strong DIBs that show a sensitivity to changes in RV that is modest and proportional to DIB strength, and (ii) a group of four very strong DIBs that react sensitively and to a similar degree to changes in RV, but in a way that does not appear to depend on DIB strength.

Conclusions. DIB behaviour as a function of reddening is not peculiar in sightlines to M17. Also, we do not detect anomalous DIB profiles like those seen in Herschel 36. DIBs are stronger, per unit visual extinction, in sightlines characterised by a lower value of RV, i.e. those sightlines that contain a relatively large fraction of small dust particles. New relations between extinction normalised DIB strengths, EW/AV, and RV support the idea that DIB carriers and interstellar dust are intimately connected. Furthermore, given the distinct behaviour of two groups of DIBs, different types of carriers do not necessarily relate to the dust grains in a similar way.
Improving processes and natural production minerals recycling
Authors: Кhrunina Natalia , Cheban Anton
Published: September 2018

The article is devoted to improving the processes of extraction of natural carbon minerals through increased selectivity and reduce dilution, as well as processing of ash-slag wastes to reduce environmental burdens and increasing complexity of extracting minerals. Data are elemental and mineral composition, energy dispersive microanalysis by scanning electron microscope JEOL JCM-6000. As a result of natural objects analysis carbon minerals, with their typing on structural and mineralogical composition, marked by the characteristic difficult structural signs plastoobraznyh and lenticular deposits. A method of treatment of structured development of carbonaceous deposits of minerals based on the improved design of the working body of the harvester, that will increase the efficiency of minerals through mining selectivity. As a result, microanalysis samples ash wastes found the presence of native gold, рlatinum and silver. The application of ways of dressing of secondary raw materials using innovative technologies developed, based on the processes of gravitational and ultrasonic cavitation effects, provide comprehensiveness of allocating valuable components micron level and reduce the pollution of Wednesday.
Modelling the development of drilling operations in iron ore quarries (based on Kachkanar MPP)
Authors: Regotunov Andrey , Antonov Vladimir
Published: September 2018

The necessity of application of quantitative models of drilling operations development in iron ore quarries for the justified planning of drilling volumes and the relevant fleet of drilling rigs has been shown. For this purpose, experimental regression studies of the patterns of formation and development of drilling operations in the transition period of the modern market economy have been carried out using the example of the Kachkanar Mining and Processing Plant, which has typical characteristic features and dynamics of changes in mining production in Russia. Based on the analysis of the annual technical and economic indices of Kachkanar MPP, conclusions have been drawn about the characteristics of the depression period of drilling production in the 1990s and its subsequent growth, coupled with qualitative changes in the fleet of drilling rigs and productivity thereof. In order to establish the relevant quantitative relationships and development forecasts of the drilling operations at the plant, a nonlinear regression model for the distribution of the length of wells drilled per year has been created, depending on the calendar time, the number of drilling rigs and their utilization factor. The model has a high determination factor of 0.9. It is adequate to the errors of the initial indices, it is statistically reliable, and in this confidence interval, it expresses regularities in changes in the annual length of the drilled wells. According to the regularities, interpretation of transient processes and forecast estimates of the development of drilling operations have been provided.
Combined method of opencast and underground mining of valuable ore
Authors: Valiev Niyaz , Berkovich Vyacheslav , Propp Vladimir , Kokarev Konstantin
Published: September 2018

The efficiency of the combined opencast and underground mining of deposits directly depends on the overburden amount within the open pit boundaries. The amount of overburden to be removed, in its turn, is determined by the angles of the open pit slopes. At the same time, the influence of the open pit slope angle on the amount of the rock mass within the open-pit contours increases in an arithmetic progression with the mining depth. This fact confirms the direct relationship between the open pit slope angle and the efficiency of the mining operations from both an economic and ecological points of view. The article considers the technology for mining steeply inclined deposits of valuable ores by means of underground chambers mined out in advance with consolidating stowing to support unworked sides of an open pit called “well”. The chambers which can be not only vertical but also inclined at an angle of 60-80° serve to create an artificial fence (a ring concrete support). The work of the fence supporting the open pit side is markedly different from that of retaining walls of any type since the consolidating stowing mixture used to create the fence provides an ideal contact of the concrete wall with the enclosing rocks, thus making it impossible for an artificial fence to overturn. The proposed combined mining technology is expected to reduce considerably the number of the overburden operations, to minimize the damage caused by mining operations to the environment, and to increase the intensity of mine workings.
Prognosis of lithological variability of the waterblocking strata based on the results of complex interpretation of seismic and electrical data
Authors: Sanfirov Igor , Stepanov Yuri , Baybakova Tatiana , Taynitskiy Alexander
Published: September 2018

This article deals with a comprehensive geophysical approach intended to ensure safety of mining operations at the Verkhnekamskoe field of potassium and magnesium salts. As an example, the article presents the results of additional detailed seismic and electrical studies performed on one of the mine fields of the Upper Kama potash-magnesium salt deposit (UKPMSD) within the site designed for mining operations. Based on the obtained results the structure in the form of a “dome” was identified. According to the data of the complex interpretation, the area of an indefinite lithology (most likely, associated with the replacement of salt deposits) was identified in the upstructure part.
Determining displacement parameters of “Kletevaya” shaft axis over mined-out space
Authors: Zubkov Albert , Sentiabov Sergey , Selin Konstantin
Published: September 2018

The development of mineral deposits very often occurs in stages. First, open-cut mining, then underground one. At the same time, the arrangement of shafts is always problematic, when it is necessary to choose between security and economic efficiency. Design solutions always convince us that the main thing is safety, but is it really so? This article is the initial stage in the formulation of a very topical issue, in the opinion of the authors, which consists in developing a method for estimating and forecasting the change in the state of shafts during operation. Experimental work was carried out at "Gaiskoe" underground mine, where seven shafts are located in operation, located 100-200 meters from the collapse zone, the depth of the trunks is more than 1300 meters. The main purpose of the research was to determine the wandering from the vertical axis of the trunk at different depths.
The role of modern geodynamic movements in the formation of geomechanical problems in subsoil use
Authors: Sashourin Anatoly , Panzhin Andrey , Konovalova July , Ruchkin Vladimir
Published: September 2018

The paper describes the role of geomechanical processes and phenomena in the development and manifestation of hazardous situations in the development of mineral deposits, threatening the working personnel and the surrounding population. The studies of the Ural Scientific School of geomechanics functioning in the Institute of Mining of Ural Branch of RAS have established that the basis for the formation of hazardous geomechanical processes and phenomena are the fundamental properties of the rock mass - hierarchical blocking and constant mobility caused by the recent geodynamical movements. The constant mobility of hierarchical block medium of rock mass under the influence of trend and short-term recent geodynamical movements gives rise to the phenomenon of the secondary structuring. The recent geodynamical movements concentrate at the borders of the secondary structures and result in the deformations exceeding by 2 - 5 times the intrablock and integral deformations and representing the main source of the hazardous impact on the mining objects and on the surrounding population. The technology of the geological environment diagnostics for the forecast of hazardous mining situations is aimed at the identification of the boundary zones of secondary structures, the estimation of the hazard level of deformation processes and the adoption of proactive measures.
Geodynamic rock condition, mine workings stabilization during pillar recovery at the level +320 m of the Yukspor deposit of the Khibiny Massif
Authors: Zhukova Svetlana , Korchak Pavel , Streshnev Anatoly , Salnikov Igor
Published: September 2018

The article represents the results of seismic monitoring during pillar recovery at the level +320m of the Yukspor deposit. The number of seismic events with an energy of more than 106 J is sharply increasing in the affected area of overlying rock base. This reflects fracture intergrowth and gradual rock failure due to stress redistribution. Mining operations cause new fractures and interstices, which in turn lead to residual stress redistribution through the formation of new defects. During the rock failure, stresses in the affected area become stable. If fracturing and timely rockfall of overlying rock base do not occur during excavations, thereafter, sudden caving poses a hazard by an underground air strike and can be a threat to the objects on surface. As for stability of mine workings, provoked gradual rock fall does not pose a threat, since this leads to consequent and constant reduction of the mountain base, and, therefore, support pressure, hanging walls become more stable. Underground seismic monitoring based on continuous seismic registration, local monitoring through various geophysical measurements and mathematical modeling of stress-strain rock condition improve the operational safety under difficult geodynamic conditions.
The geomechanical state of the mine «mnogovershinnoe» lower levels monitoring
Authors: Avdeev Arkady , Sosnovskaya Elena , Krinitsyn Roman
Published: September 2018

In the low level mining of the Mnogovrshonniy mine, there was a harmful rock stress manifestation in the form of displacement and collapse of rock blocks, which adversely affected the safety of mining operations and reduced the mining efficiency. There was an urgent need to conduct special studies of the geomechanical execution process at the mine. In the process of research the basic physical and mechanical rock characteristics were determined, the initial natural ground stress, manmade stress in mines and pillars was measured, the stability degree of underground cavities was determined. Based on the current geological and surveying documentation analysis and visual observations, the areas of mine workings that are dangerous because of the rock stress and displacement manifestations were established. For the identified areas, projects to set the observation stations to monitor the parameters of the geomechanical state of excavations that affect the safety of mining operations have been developed. The most optimal methods and observing techniques for specific conditions of the mine were chosen. Based on the developed projects, a complex of observation stations on the low mine level was set. Several series of observations were made. The research helped to identify the factors that had the most influence on the mine stability. The assessment of the underground cavities stability degree was carried out, measures to ensure the safety of mining operations were proposed, and the directions for the further research on the creation and improvement of the rock stress observation stations system at the mine were proposed.
The problems of monitoring the deformation processes in the integrated development of the underground space of metropolitan cities
Authors: Neguritsa Dmitriy
Published: September 2018

By analyzing the existing regulatory documents regulating the surveying and geodetic monitoring of buildings and structures from the negative impact of mining and construction works, conclusions were drawn about the problems of its implementation in the conditions of modern metropolitan cities and the imperfection of the methodology for observing deformational processes in the construction of underground structures. New approaches to the organization of monitoring of deformation processes in metropolitan cities were proposed.
Research of the geological factors of coal deposits in the south of the Far East by electrical exploration methods
Authors: Shkabarnya Nikolay , Shkabarnya Grigory , Nechaeva Evgenia , Korneeva Svetlana
Published: September 2018

Coal deposits in the south of the Far East are characterized by complex geological factors, which is due to the inclined occurrence the enclosing layers and coal seams, high pressure of underground water, the presence of water-bearing sandy-pebble and gravel-pebble sediments, the presence of numerous faults and various inclusions, the presence of island permafrost. In the exploration of deposits, the low efficiency of previously used electrical exploration methods, including electrical sounding and profiling, was noted. In this paper, it is shown that increasing efficiency in the solution of some mining and geological tasks is associated with the use of the electrical tomography method. This method has advantages in the conditions of weak differentiation of rock resistivity due to the high density of obtained parameters. With the use of electrical tomography, the tasks in the allocation of tectonic disturbances and coal seams uplift under quaternary sediments, estimation of the landslide slopes structures on the coal pit edges have been solved. Successful results were obtained in isolating the weathered layer of the bedrock, sandstone outcrops under the soil-vegetative layer in the upper part of the section, the bedrock surface on the deposit’s flanks and the covers of effusive rocks on the surface.
Influence of agitation leaching conditions to the behavior of gold in solution
Authors: Prokhorov Konstantin
Published: September 2018

Deposition of gold ions in the process of agitation with a chloride-hypochlorite solution with 8.15 g/l active chlorine concentration in the model material was studied. Fresh chlorite-hypochlorite solution was used in the study. The effect of the initial pH of the medium on the dynamics of gold deposition is considered. It was found that up to 56% of gold precipitates in alkaline medium. Precipitation is not observed at pH<6. It is established that the ore under investigation has buffer properties and stabilizes the pH of the medium to weak-acid (pH = 5.5-6).
Study of promises for the use of ultrasound in the technology of secondary benefication of processing wastes
Authors: Voronova Olga , Kienko Lidiya
Published: September 2018

The results of the study, aimed at designing of benefication technology of mine processing wastes of Voznesenskiy ore district, are presented in this paper. By the expert appraisals, the amount of tailings dumps of the Yaroslavskaya Mining Company is estimated to be more than 30 million tons. Sample testing has shown that fluorite content varies from 13% to 23%, calcite - up to 14%, and zinc - in the range of 0.4-0.6%. The research was conducted with tailing samples containing 20.7% of CaF2 and 10.2% of CaCO3. Mineral grains of the secondary raw material were examined for their surface state and a package of necessary preliminary operations, which provide an efficient material - flotation reagents interaction, was determined. It has been established that extraction of fluorite to concentrates that would match existing requirements is possible in principle. The use of ultrasonic treatment of material in its preparation for flotation is conditioned by an effective desorption of films of different nature from mineral particles. The suggested scheme of fluorite flotation involves preliminary treatment of raw material by ultrasound with dumping of released mud fractions. The optimal operating regime allows obtaining concentrates of higher quality than it is under usual technology without the ultrasonic exposure. In this process, the extraction of fluorite to a concentrate with 94.47% of CaF2 increases up to 61.11%, which is higher by 2.96% against the original studies.
Simulation modeling of centrifugal concentrator as a basis for increasing its output in enriching industrial waste
Authors: Taskin Andrey , Danilov Oleg , Shalanin Viktor , Alekseiko Leonid , Elkin Oleg
Published: September 2018

In the research paper a computer model of the operation of a vibrational concentrator used to separate the slurry into individual fractions of a grain size by depositing particles of specified characteristics in the field of centrifugal forces is created and verified using the methods of computational hydrodynamics with the Ansys software complex. Using the model will make it possible to: 1) to study the operation of concentrators of various sizes and designs under different operating conditions, with a change in hydraulic characteristics (speed of treated liquid, speed of rotation of the bowl); 2) in the future study the problems of depositing suspended particles of specified characteristics (density, size) in a centrifugal field and determine the concentration of the sediment in the treatment process. The results of the work will make it possible to increase the efficiency of the enrichment of ash and slag waste due to a more thorough understanding of interaction mechanisms between the centrifugal concentrator and the enriched geomaterial.
Synthesis of titanium carbide from the rutile concentrate by low temperature plasma
Authors: Kuz’michev Evgeny , Nikolenko Sergey
Published: September 2018

As a result of the synthesis of titanium-containing mineral raw materials (rutile concentrate), using high-density energies, the metal titanium and titanium carbide were produced. The article presents the results of experiments on the possibility of using high-density energies for the synthesis of functional materials for industrial use.
The new wave of technological innovations for sustainable development of geotechnical systems
Authors: Kaplunov David , Rylnikova Marina , Radchenko Dmitry
Published: September 2018

Today the development of information network technologies and the new equipment determine the new strategies in the designing ore deposits exploration with elements of artificial intelligence, software system processing of the geodata, high-precision methods and tools for studying the mineral matter and the structure of mine massifs, renewable energy, and green technologies. In addition, these components are used in the sustainable operations of mine technical systems, for the active expendable of which it is necessary to make a transition to a new technological setup. It is associated with the capabilities of operational synchronous transformation of the taping resources and the adaptation of geotechnologies to specific conditions, to meet the needs of society in georesources.
On the strategy of utilization of resources of nonferrous metals in the far eastern region
Authors: Arkhipov Gennady
Published: September 2018

Analysis of current status and use of lead and zinc resources in the Far Eastern region, on the territory of Primorsky region for many decades and such analysis is of practical importance for evaluation and selection of areas in this field of activity. Russia safeguarded stocks and lead and zinc resources in the long term. On the territory of the Far East region there are significant deposits of these metals, but for single resources most of them substantially less large deposits in other regions of Russia - Siberia, Altai, Ural. Significantly to support lead-zinc industry in the region is possible in case of exploration of new deposits of ores with high quality. Lead and zinc minerals industrial scale in the region undoubtedly has and can be represented by a leading geological-industrial types of fields, but there is currently little studied. You must not reforming the present state of the industry and its innovative development: need to develop intra-regional use of raw materials in the form of the final product, that will give the region's resources development of new incentives. Nonferrous metals resource potential of the region, with an effective strategy to use them can be a significant factor in changing the geopolitical significance of the far eastern part of Russia.