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International Journal of Sediment Research 2022年第2期37卷 202-213页

作者： Douglas B.Sims Amanda C.Hudson John E.Keller Michael Strange Andressa Cristhy Buch David Ferrari Giavanna M.Fernandez Juan Garcia-Hernandez Bailey D.Kesl Sean Torres Department of Physical Sciences College of Southern Nevada university of Nevada Fluminense federal university

The dispersion and influence of soluble and particulate trace elements(TEs) present in the materials from abandoned mines is an imminent problem on terrestrial and aquatic *** goal of this research is to provide a broader view of such transport,assessing particle size distribution and TE interactions(e.g.,scavenging) with mine tailings and locally derived sediments transported by water in arid *** grains from wash sediment were collected from a dry ephemeral wash in Nelson,Nevada where the Techatticup Mine and Mill worked between 1850 and *** were evaluated to determine the association and behavior of certain metals and metalloids including aluminum,arsenic,barium,cadmium,copper,chromium,iron,manganese,lead,selenium,vanadium,and zinc to rock varnish laminated *** show that some metals and metalloids were more concentrated on larger particles whereas others indicated the opposite *** example,As was greatest on silt fractions and least on coarse fractions,while Se was detected only on ***,Cu,Fe,Mn,Pb,and Zn concentrations all increased with decreasing particle size(silt> sand> coarse),whereas Al,Ba,and V showed the opposite trend(silt regions could lead to the enrichment of some TEs in downgradient areas from source materials.

关键词： Adsorption Metals Metalloids Mine tailings Particle size Transport

Assessment of Vulnerability of Oxisols to Compaction in the Cerrado region of Brazil

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Pedosphere 2010年第2期20卷 252-260页

作者： A.E.AJAYI M.S.DIAS JUNIOR N.CURI A.OKUNOLA T.T.TEIXEIRA SOUZA B.SILVA PIRES Department of Agricultural Engineering Federal University of Technology Departamento de Ci encia do Solo Universidade Federal de Lavras federal College of Agriculture Fundacao de Ensino Superior de Passos Universidade do Estado do Minas Gerais

The Cerrado region of Brazil,one of the fastest-growing agricultural areas in the world,is undergoing very rapid mechanization;this development is good for the country's economy but may also snowball into substantial loss of agricultural land and other environmental degradation if the soil susceptibility and vulnerability to compaction is not well *** this study we explored different techniques for estimating soil intrinsic abilities to withstand applied pressure using the prevalent Oxisols of the Cerrado region under native *** samples were collected from three sites within the region and subjected to 1) compressibility test;2) manual penetration resistance test;3) automated penetration resistance test;and 4) packing density *** four methods produced analogous *** results showed the significant influence of soil structure on the inherent strength and compaction susceptibility of the *** also established the association of soil structure with the mineralogy of the *** is noteworthy that the packing density which was developed from very simple and easily obtained parameters could give a picture of the tendency of the soil to ***,this approach would be useful in developing compaction susceptibility maps for the *** could be concluded that most of the Oxisols in the Cerrado region would support mechanized agricultural production very ***,there is need for careful management of the mechanization process to avert *** management techniques should include conservationist practices such as no till in order to maintain as much as possible the favorable structure and drainage of these very old soils.

关键词： compressibility packing density penetration resistance soil structure

Epidemiological, prevention and control updates of yellow fever outbreak in Brazil

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Asian Pacific Journal of Tropical Medicine 2019年第2期12卷 49-59页

作者： Marli do Carmo Cupertino Rebeca Garcia Andréia Patrícia Gomes Sérgio Oliveira de Paula Nicholas Mayers Rodrigo Siqueira-Batista Medical School Dinamica College of the Piranga Valley Laboratory of Epidemiological and Computational Methods in Health Department of Medicine and Nursing Federal University of Vicosa Laboratory of Immunovirology Department of General Biology Federal University of Vicosa Department of Veterinary Medicine Universidade Federal de Vicosa

Yellow fever is an acute viral disease endemic to tropical countries, like Brazil, where, since the 1940 s, has no significant documented outbreaks similar to that observed between 2016/2018(2 045 confirmed cases and 677 deaths; caused by the sylvatic form).The principal manipulating factors inciting this change were absence of appropriate vaccination campaigns and increased urbanization & population growth in forest areas, with prevalence of the virus in the species inhabiting of these *** 2016/2018 outbreaks exhibited incidence in areas with historically low or no yellow fever virus activity, triggering a surge in recorded deaths-mainly in the Southeastern states of *** Brazilian government aggressively responded, reforming the countries' prophylactic measures, including vaccine implementation-as of March, 2018, switching from the former double dose regimen of the vaccine, to a single dose protocol, deemed as ***, some states appropriated the fractionated dosage(1/5 of the standard dose), in foresight of potential vaccine *** prevent the uprising of new sylvatic yellow fever cases in Brazil, it's obligatory the development of effective combative plans, including adaptation of prophylactic measures individually(use of repellents, protective clothing etc.), applicable vaccination campaigns in every endemic region, to raise awareness to locals and visitors *** these preventative strategies, the persistence of cases and the recent outbreaks in Brazil, highlight the possible ineffectiveness of combative *** on these considerations, the objective of this review was to raise more awareness of the epidemiological impact of the disease in Brazil.

关键词： Infectious disease Epidemiology Arboviruses Yellow fever Aedes aegypti

Prediction of strength and deformability of an interlocked blocky rock mass using UDEC

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第3期9卷 149-160页

作者： Y.M.Alshkane A.M.Marshall L.R.Stace Department of Civil Engineering University of Sulaimani Sulaimani Kurdistan Region Iraq Department of Civil Engineering University of Nottingham University Park Nottingham NG7 2RD UK

The accurate prediction of strength and deformability characteristics of rock mass is a challenging *** practice,properties of a rock mass are often estimated from available empirical relationships based on the uniaxial compressive strength(UCS).However,UCS does not always give a good indication of in situ rock mass strength and *** aim of this paper is to present a methodology to predict the strength and deformability of a jointed rock mass using UDEC(universal distinct element code).In the study,the rock mass is modelled as an assemblage of deformable blocks that can yield as an intact material and/or slide along predefined joints within the rock mass.A range of numerical simulations of uniaxial and triaxial tests was conducted on rock mass samples in order to predict the equivalent mechanical properties for the rock mass under different loading ***,results are compared with the deformability parameters obtained by analytical methods.

关键词： Strengt Deformability ock mass Universal distinct element code(UDEC)

Impact of microfacies and diagenesis on the reservoir quality of Upper Devonian carbonates in Southeast Tatarstan,volga-Ural Basin,Russia

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Petroleum Research 2023年第3期8卷 386-403页

作者： Ibrahem Yousef V.P.Morozov A.N.Kolchugin A.Leontev Kazan federal university Institute of Geology and Petroleum Technologies420008Russia

The results of integrated sedimentology,petrography,and petrophysical study of the Upper Devonian(Middle Famennian)Dankovo-Lebedyansky carbonates from Southeast Tatarstan of the volga-Ural Basin revealed a variety of microfacies and diagenetic events that impacted the reservoir *** our earlier study documented microfacies analysis and depositional environments,none of the studies focused on diagenesis,microfacies interaction,and their controls on the studied sediment's reservoir *** on petrographic and microfacies analyses,the seven identified microfacies types are peloidal grainstone MF 1,cemented bioclastic peloidal grainstone MF 2,echinoderm-concentrated packstone MF 3,algae packstone MF 4,bioclastic wackestone MF 5,whole-fossil wackestone MF 6,and dolomite MF *** the investigated sediments,a gently deepening carbonate ramp depositional model with an inner,middle,and outer ramp setting is *** observed diagenetic events in this study include micritization,calcite cementation(six cement types),dolomitization(six dolomite types),dissolution(fabric and non-fabric-selective dissolution),compaction,and *** identified microfacies were classified into three distinct classes based on their petrophysical *** 1 and MF 7 are microfacies types with the best reservoir *** 3 and MF 4 are microfacies types of moderate reservoir *** 2,MF 5,and MF 6 are microfacies types with poor or non-reservoir *** cementation,micritization,and compaction are the primary diagenetic modifications responsible for porosity *** pores created by dissolution are a significant porosityimproving *** is locally enhanced by stylolite and *** improved reservoir quality by creating intercrystalline and vuggy *** the impact of microfacies and diagenesis on reservoir quality is crucial for understanding reservoir properties in nearby fields with sim

关键词： Microfacies Diagenesis Reservoir quality Upper Devonian Dankovo-Lebedyansky Tatarstan volga-Ural Basin

Exploring Sulfur Chemistry in TMC-1 with NSRT

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Chinese Physics Letters 2024年第2期41卷 129-132页

作者： Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba Yanan Feng Zhenzhen Miao Jiangchao Yang Jixing Ge Gleb Fedoseev Donghui Quan Qiang Chang Chuan-Lu Yang Tao Yang Gao-Lei Hou Yong Zhang Xuan Fang Xia Zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan Sun Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China university of Chinese Academy of Sciences Beijing 100049China Nicolaus Copernicus Astronomical Center Rabia´nska 887-100 Toru´nPoland Research Laboratory for Astrochemistry Ural Federal UniversityKuibysheva St.48620026 EkaterinburgRussia Astronomical Computing Research Center Zhejiang LaboratoryHangzhou 311100China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China School of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510275China Laboratory for Space Research Faculty of ScienceThe University of Hong KongHong KongChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense *** of these studies used a C/O ratio of 0.7 or *** present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical *** findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and *** simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores.

关键词： sulfur Sulfur depletion

Artemia cyst production in Russia

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Chinese Journal of Oceanology and Limnology 2015年第6期33卷 1436-1450页

作者： Liudmila I.LITVINENKO Aleksandr I.LITVINENKO Elena G.BOIKO Kirill KUTSANOV federal State Unitary Enterprise GosrybcenterTyumenRussia State Agrarian university of Northern Urals

In Western Siberia(Russia) there are about 100 Artemia lakes with total area over 1 600 km *** these lakes are located between 51°–56°N and 61°–82°*** general these lakes are shallow(depth less than 1.5 m),small or medium size(0.1 to 10 km 2);they are chloride;their total salinity is from 40 to 250 g/*** harvesting of cysts per year is only in 20–40 *** Russia 550 tons of dry Artemia cysts(14%–18% of the world production) were harvested *** includes about 350 tons in the Altai region and 200 tons in other *** our regular 20-year study period the cyst harvest was:95 tons in Kurgan;65 tons in Omsk,20 tons in Novosibirsk,20 tons in *** of increasing cyst harvest in Russia are considered in this *** the last 30 years the harvest of cysts in Russia has increased from 7–20 to 500–600 tons.A significant influence of dryness of the year was found on productivity in selected lakes,but taken for all the lakes together,the relationship was not *** optimal salinity for productivity of cysts in the lakes was *** of productivity of the lakes and the harvesting results showed that the stocks of cysts are underutilized by approximately 1.7 times.

关键词： Artemia brine shrimp cyst production Russian saline lakes population dynamics aquacultureindustry

Mechanism of the Initial Stage of Thermal Decomposition of Nitroguanidine

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火炸药学报 2023年第1期46卷 31-40页

作者： Boris E.Krisyuk Danila A.Markin Timofey M.Sypko Viktor V.Zakharov Nikita V.Chukanov Boris L.Korsunskiy federal Research Center of Problems of Chemical Physics and Medicinal Chemistry Russian Academy of Sciences142432prosp.Academician Semenov1ChernogolovkaMoscow RegionRussia Plekhanov Russian university of Economics Department of Chemistry and Physics36 Stremyanny laneMoscow 117997Russia Lomonosov Moscow State university Faculty of Fundamental Physical and Chemical engineeringGSP-11 Leninskie Goryp.51Moscow 119991Russia N.N.Semenov federal Research Center for Chemical Physics Russian Academy of Science 4 Kosygina StreetBuilding 1Moscow 119991Russia

A theoretical and experimental study of the thermal decomposition of nitroguanidine(NQ) has been carried out. Various thermolysis channels were studied by quantum chemistry methods at the CCSD(or DLPNO-CCSD) level using the aug-cc-pVDZ basis set. It is shown that the lowest activation enthalpies(170-180kJ/mol) are characteristic of the reactions of NO2abstraction from the initial NQ and the reaction channel with the transfer of oxygen from the nitro group to carbon in the limiting stage. Additionally, the thermolysis of NQ was studied experimentally in a nonisothermal mode with heating rates from 1 to 10K/min. In these experiments, the weight loss of the sample, thermal effects, and mass spectra of the products were recorded. An analysis of the experimental data confirmed the results of a theoretical study of the mechanism of thermal decomposition of NQ. The main thermolysis products are N2O, HNCO, NH3, and NO2, which fully corresponds to quantum chemical calculations.

关键词： primary thermolysis steps quantum-chemical calculation mass spectrometry DSC TG

Microfacies analysis and depositional environment of the Upper Devonian Dankovo-Lebedyansky sediments,Tatarstan,volga-Ural Basin,Russia

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Petroleum Research 2023年第2期8卷 244-255页

作者： Ibrahem Yousef V.P Morozov A.N Kolchugin V.Sudakov I.Idrisov A.Leontev Kazan federal university Institute of Geology and Petroleum Technologies420008Russian Federation

The Upper Devonian,Middle Famennian Dankovo-Lebedyansky sediments in Southeast Tatarstan territory are a carbonate sequence composed of limestone and dolomite,which is important hydrocarbon reservoir units,therefore,it is necessary to conduct in-depth study on its microfacies and depositional *** this study,a multidisciplinary approach that combines core observation with thin section examination is *** limestone contains abundant skeletal grains(echinoderms,foraminifera,algae,gastropods,and calcispheres),as well as non-skeletal grains(intraclasts and peloids).On the basis of detailed petrographic investigations,six sedimentary microfacies can be identified,including(i)peloidal grainstone(MF 1),(ii)cemented bioclastic peloidal grainstone(MF 2),(iii)echinodermconcentrated packstone(MF 3),(iv)algae packstone(MF 4),(v)bioclastic wackestone(MF 5),(vi)whole-fossil wackestone(MF 6),as well as dolomite or dolostone as diagenetic facies(MF 7).Based on microfacies analysis,the Dankovo-Lebedyansky sediments were deposited in three distinct sedimentary facies belts(shoal,lagoon and open marine environment).In order to reflect dispositional energy condition,the microfacies were grouped into facies associations:(i)low-energy microfacies associations including MF 5 and MF 6,(ii)moderate energy microfacies associations including MF 1,MF 2,MF 3,and MF *** dolomite,or diagenetic facies(MF 7),is the result of slightly to extensively dolomitization of limestone in the Dankovo-Lebedyansky *** of frequent dolostone types are euhedral planar-e and subhedral *** to petrographic characteristic of the dolostone,a seepage reflux model can be used to explain the dolomitization process of Dankovo-Lebedyansky sediments.

关键词： Microfacies Depositional environments Carbonate Dolomitization Upper devonian Dankovo-lebedyansky volga-ural basin

Sedimentary diagenesis and pore characteristics for the reservoir evaluation of Domanik formations(Semiluksk and Mendymsk)in the central part of volga-Ural petroleum province

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Petroleum Research 2022年第1期7卷 32-46页

作者： Yousef Ibrahem V.P.Morozov V.Sudakov I.Idrisov A.N.Kolchugin Kazan federal university Institute of Geology and Petroleum Technologies420008Russian Federation

The Upper Devonian Semiluksk(Domanik)and Mendymsk carbonate successions have been identified as the most promising unconventional oil and gas deposits in Russia's volga-Ural petroleum *** lithofacies were identified:limestones,organic matter-rich siliceous carbonate,and dolomitic limestones/*** sediments are thought to have accumulated in the relatively deep-sea shelf depositional *** to X-ray analysis,calcite is the most common mineral phase in the *** siliceous carbonate rocks'major mineral phases were identified to be quartz,followed by *** rocks have relatively poor reservoir qualities,with porosity ranging from 0.1 to 5%and permeability ranging from 0.01 to 10 *** examination of thin sections reveals four major types of pores:*** pores,which are abundant in all of the examined lithofacies;*** pores formed between dolomite crystals and the very fine components of the siliceous carbonate *** as a result of leaching,and *** as a result of tectonic and/or diagenetic *** the obtained data from the petrographically examined thin sections on the ternary pore plot diagram resulted in the identification of six pore facies and their related diagenetic *** facies 1 depicts the pores that formed during the depositional *** facies 4 displays moldic *** vugs are represented by pore facies *** facies 2 is a mixture between pore facies 1 and pore facies *** facies 3 is a mixture between pore facies 1 and pore facies *** facies 5 is a mixture between pore facies 4 and pore facies *** the petrographic results and the identified pore facies show that pore facies 6 have touching pores and they played the most important role in improving the reservoir *** pore facies 4 which have separate pores have the most influence in the reduction of the reservoir *** diagenetic origin secondary pores are the most

关键词： Domanik formations Shale oil Lithofacies Diagenesis Reservoir characteristics Central part of volga-ural