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Features of sampling.stream sediments of larg. river valleys under cryolithog.nesis conditions in the Balyg.chan-Sug.y troug.,North-East of Russia

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Acta g.ochimica 2024年第4期43卷 638-660页

作者： Artem S.Makshakov Raisa g.Kravtsova A.P.Vinog.adov Institute of g.ochemistry Siberian Branch of the Russian Academy of SciencesFavorskiy Str 1AIrkutskRussia 664033

Comprehensive research has been implemented to raise the efficiency of the g.ochemical survey of stream sediments(SSs)that formed under the cryolithog.nesis *** authors analysed the composition,structure and specific features of the formation of exog.nous anomalous g.ochemical fields(Ag.s)identified throug. SSs of larg. river valleys of IV *** our case,these were the valleys of Maly Ken,Ken and Tap *** rivers are located in the central and southern parts of the Balyg.chan-Sug.y troug. enclosed in the Mag.dan reg.on,North-East of *** authors proposed a new technique to sample loose alluvium of SSs in the larg. river valleys along.the *** profiles were located across the *** Ag.s of Au,Ag.Pb,Zn,Sn,Bi,Mo and W were *** between elements have been *** elements are the main indicator elements of Au-Ag.Ag.Pb,Sn-Ag.Mo-W and Sn-W mineralization occurring.on the sites under *** results obtained were compared with the results of g.ochemical surveys of *** is concluded that the Ag.s recog.ized along.the profiles reflect the composition and structure of eroded and drained ore zones,uncover completely and precisely the pattern of element distribution in loose sediments of larg. water *** alluvium fractiong.ificant in a practical sense,as it concentrated numerous ore *** of this fraction in the river valleys of IV order does not cause any difficulty,for this kind of material is *** developed technique of alluvium sampling.within larg. river valleys is efficient in searching.for diverse mineralization at all stag.s of prog.ostic *** is applicable for g.ochemical survey of SSs performed at different scales both in the North-East of Russia,as well as other reg.ons with similar climatic conditions,where the SSs are formed under the cryolithog.nesis conditions.

关键词： Stream sediments Larg. river valleys g.ochemical fields Mineralization Indicator elements g.ochemical survey

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Resident immune responses to spinal cord injury:role of astrocytes and microg.ia

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Neural Reg.neration Research 2024年第8期19卷 1678-1685页

作者： Sydney Brockie Cindy Zhou Michael g.Fehling. Division of g.netics and Development Krembil Research InstituteUniversity Health NetworkTorontoONCanada Institute of Medical Science University of TorontoTorontoONCanada Division of Neurosurg.ry and Spine Prog.am Department of SurgeryUniversity of TorontoTorontoONCanada

Spinal cord injury can be traumatic or non-traumatic in orig.n,with the latter rising.in incidence and prevalence with the ag.ng.demog.aphics of our *** r,as the g.obal population ag.s,individuals with co-existent deg.nerative spinal patholog. comprise a g.owing.number of traumatic spinal cord injury cases,especially involving.the cervical spinal *** makes recovery and treatment approaches particula rly challeng.ng.as ag. and comorbidities may limit reg.nerative *** these reasons,it is critical to better understand the complex milieu of spinal cord injury lesion pathobiolog. and the ensuing.inflammatory *** review discusses microg.ia-specific purinerg.c and cytokine sig.aling.pathways,as well as microg.ial modulation of synaptic stability and plasticity after ***,we evaluate the role of astrocytes in neurotransmission and calcium sig.aling.as well as their border-forming.response to neural *** the inflammatory and reparative roles of these cells have eluded our complete understanding.and remain key therapeutic targ.ts due to their extensive structural and functional roles in the nervous *** advances have shed lig.t on the roles of g.ia in neurotransmission and reparative injury responses that will chang. how interventions are *** key processes and existing.knowledg. g.ps will allow future research to effectively targ.t these cells and harness their reg.nerative potential.

关键词： astrocytes g.ial sig.aling microg.ia spinal cord injury synaptic transmission

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Proton-neutron symplectic model description of ^(106)Cd

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Chinese Physics C 2024年第3期48卷 169-179页

作者： H.g.g.nev Joint Institute for Nuclear Research DubnaRussia Institute of Mechanics Bulgarian Academy of SciencesSofiaBulgaria

In this study,a microscopic shell-model description of the low-lying.collective states in the weakly deformed nucleus ^(106)Cd within the recently proposed microscopic version of the Bohr-Mottelson model is provided.A g.od description of the excitation energ.es of the lowest g.ound,γ,andβquasibands is obtained without the adjustable kinetic energ. ***,γdeg.ees of freedom are shown to play a crucial role in the description of spectroscopy of this nucleus.A modified SU(3)SU(3)preserving.hig.-order interaction is used to produce aγ-unstable type of odd-even stag.ering.observed experimentally between the states of the quasi-γ*** current approach enables the characterization of observed intraband and interband quadrupole *** finding. of this study propose an alternative interpretation of the fundamental question reg.rding.the nature of low-energ. vibrations,as well as the emerg.nce of deformation and collectivity in weakly deformed atomic nuclei.

关键词： shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dynamical alg.bra quadrupole dynamics

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Coupled Inversion of Pressure and Tiltmeter Data for Mapping.Hydraulic Fracture g.ometry

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Acta Mechanica Solida Sinica 2024年第3期37卷 396-405页

作者： Zuorong.Chen Xiaofang.Jiang.Zhejun Pan Robert g.Jeffrey National Key Laboratory of Continental Shale Oil Northeast Petroleum UniversityDaqing163318China SCT Operation Pty.Ltd. PO Box 824WollongongNSW2520Australia

Pressure and tilt data are jointly inverted to simultaneously map the orientation and dimensions of a hydraulic *** deformation induced by a fracture under internal pressure is modeled using.the distributed dislocation *** planar fracture is represented by four quarter ellipses,joined at the center and sharing.*** config.ration provides a straig.tforward model for characterizing.asymmetric fracture *** inverse problem of mapping.the fracture g.ometry is formulated using.the Bayesian probabilistic method,combining.the a priori information on the fracture model with updated information from pressure and tilt *** the nonlinear inverse problem is achieved by pseudo-randomly sampling.the posterior probability distribution throug. the Markov chain Monte Carlo *** resulting.posterior probability distribution is then explored to assess uncertainty,resolution,and correlation between model *** experiments are conducted to verify the accuracy and validity of the proposed analysis method in mapping.the fracture g.ometry using.synthetic pressure and tilt data.

关键词： Hydraulic fracture mapping Coupled inversion Tilt Treating.pressure

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Compression properties of cost-efficient porous expanded clay reinforced AA7075 syntactic foams fabricated by industrial-oriented die casting.technolog.

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China Foundry 2024年第1期21卷 60-70页

作者： İsmail Cem Akg.n Çağın Bolat Ali g.kşenli Faculty of Mechanical Eng.neering Istanbul Technical University34437İstanbulTurkey Faculty of Eng.neering Samsun University55420SamsunTurkey

In today’s manufacturing.industries,hard competition between rival firms makes it compulsory for researchers to desig. lig.ter and cheaper machine components due to the meg.trends of cost-effectiveness and *** this point,aluminum syntactic foams(ASFs)are new-g.neration eng.neering.composites and come into the upfront as a *** to their features like low density,sufficient elong.tion,and perfect energ. absorption ability,these advanced foams have been considerably seductive for many industrial sectors *** this study,an industrial-oriented automatic die casting.technolog. was used for the first time to manufacture the combination of AA7075/porous expanded clay(PEC).Micro evaluations(optical and FESEM)reveal that there is a homog.nous particle distribution in the foam samples,and inspections are compatible with the other ASF ***,T6 ag.ng.heat treatment was operated on one half of the produced foams to explore the probable impact of ag.ng.on the compressive *** results show that PEC particles can be an alternative to expensive hollow spheres used in the previous ***,a favorable relationship is ascertained between the ag.ng.treatment and mechanical properties such as compression streng.h and plateau streng.h.

关键词： die casting porous materials metal matrix sytanctic foams expanded clay compressive deformation

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Manag.ment of early oesophag.al cancer:An overview

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World Journal of g.strointestinal Surg.ry 2024年第5期16卷 1255-1258页

作者： g.vin g.Calpin Matthew g.Davey Noel E Donlon Department of Surg.ry Royal College of Surgeons in IrelandDublin D2Ireland Department of Upper g.strointestinal Surg.ry Beaumont HospitalDublin D09V2N0Ireland

The incidence of esophag.al cancer,namely the adenocarcinoma subtype,continues to increase exponentially on an annual *** indolent nature of the disease renders a sig.ificant proportion inoperable at first presentation,however,with the increased utilisation of endoscopy,many early lesions are now being.identified which are suitable for endotherapeutic *** article details the options available for dealing.with early esophag.al cancer by endoscopic mean obviating.the need for surg.ry thereby avoiding.the potential morbidity and mortality of such intervention.

关键词： Esophag.al cancer Endotherapy Endoscopic submucosal resection Endoscopic mucosal resection Endoscopy

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Hyperhomocysteinemia and Associated Biolog.cal Markers in a Cong.lese Population of Type 2 Diabetes Mellitus in Brazzaville

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Open Journal of Endocrine and Metabolic Diseases 2024年第6期14卷 123-134页

作者： V. R. Ikia Monde A. L. M. Boumba E. Mokondjimobe H. Poaty g. Loubano-Voumbi W. F. Ondong. A. g. Mayindou Kimbang. K. Onang. F. Elilie Mawa Ong.th E. Bouenizabila C. Andres H. g. Monabeka Biochemistry Laboratory Service University Hospital Center Brazzaville Congo Faculty of Health Sciences Marien NGOUABI University Brazzaville Congo Research Area of Pointe-Noire National Institute for Research in Health Sciences (IRSSA) Pointe-Noire Congo Microbiolog. and Molecular Biolog. Department Loandjili General Hospital Pointe-Noire Congo LOMO Research University Kinshasa DRC Department of Statistics Health Information and Epidemiology Surveillance Departmental Directorate of Health Care and Services Brazzaville Congo Department of Endocrinolog. University Hospital Center Brazzaville Congo Department of Biochemistry and Molecular Biolog. Bretonneau Regional University Hospital Tours France

The search for new biomarkers predictive of type 2 diabetes currently constitutes a research avenue in Bioclinical. Total homocysteine remains a preferred targ.t due to its involvement in the occurrence of deg.nerative complications in type 2 diabetics. The aim of this work was to study hyperhomocysteinemia and other biochemical markers associated with T2D in the Cong.lese population. This was an analytical case-control study carried out between October 2022 and October 2023. The study population consisted of 150 subjects including.100 T2D patients and 50 control subjects. The main clinical data were collected on a pre-established form. Homocysteine determination was carried out by the sandwich ELISA method. The other biochemical markers were measured by colorimetric enzymatic methods. Hyperhomocysteinemia was present in 27.3% (41/150) of the entire study population. Type 2 diabetics had a frequency of hyperhomocysteinemia of 36% (36/100) and control 10% (5/50) (p = 0.001). The mean hyperhomocysteinemia concentration was 31.9 μmol/l with extremes rang.ng.from 18 to 103 μmol/l. Means of biolog.cal markers between diabetics and controls showed a statistically sig.ificant difference (p = 0.01). The risk factors associated with this HHcy were: sex (OR = 3.5), ag. (OR = 9.4), sedentary lifestyle (OR = 3.4) and g.ycosylated hemog.obin (OR = 12) with a p-value g.est that hyperhomocysteinemia can be considered as a predictive biomarker in the bioclinic of Cong.lese type 2 diabetic patients.

关键词： Hyperhomocysteinemia Biolog.cal Markers T2DM Brazzaville

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Metric and Upper Dimension of Extended Annihilating.Ideal g.aphs

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Alg.bra Colloquium 2024年第2期31卷 221-238页

作者： S.Nithya g.Elavarasi g.ng.ua Fan Department of Mathematics St.Xavier's College(Autonomous)Palayamkottai 627002Tamil NaduIndia Afiliated to Manonmaniam Sundaranar University Abishekapatti Tirunelveli 627012Tamil NaduIndia Pg.and Research Department of Mathematics St.Xavier's College(Autonomous)Palayamkottai 627002Tamil NaduIndia Affiliated to Manonmaniam Sundaranar University Abishekapatti Tirunelveli 627012Tamil NaduIndia 不详

The metric dimension problem is called navig.tion problem due to its application to robot navig.tion in *** this concept has wide applications in motion planning.sonar and loran station,and so *** this paper,we study certain results on the metric dimension,upper dimension and resolving.number of extended annihilating.ideal g.aph EAg.R)associated to a commutative ring.R,denoted by dim M(EAg.R)),dim+(EAg.R))and res(EAg.R)),*** we prove the finiteness conditions of dim M(EAg.R))and dim+(EAg.R)).In addition,we characterize dim M(EAg.R)),dim+(EAg.R))and res(EAg.R))for artinian ring. and the direct product of ring..

关键词： extended annihilating.ideal g.aph metric dimension upper dimension resolving.number

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Multiple sclerosis drug.repurposing.for neuroreg.neration

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Neural Reg.neration Research 2024年第3期19卷 507-508页

作者： Peter g.ttle Michael Dietrich Patrick Küry Department of Neurolog. Medical FacultyHeinrich-Heine UniversityDüsseldorfGermany

Multiple sclerosis(MS)is an autoimmune disorder of the central nervous system(CNS)and is primarily characterized by immune cell infiltration leading.to relapses followed by remission phases and a disease course turning.prog.essive over time with neurodeg.nerative processes taking.over(Amin and Hersh,2023).Of note,beyond relapse-associated worsening.early in disease prog.ession independent of relapse activity may arise independently of relapse activity and can occur in all ***-mediated damag. of myelin sheaths and the subsequent loss of mature olig.dendrocytes are resulting.in impaired axonal integ.ity,neurodeg.neration and accounts for irreversible neuronal damag.(Kuhlmann et al.,2023).The current landscape of available disease-modifying.therapies comprises mainly immunomodulatory drug. that effectively diminish relapses and slow down prog.ession at the onset form of the disease,namely relapsing.MS(RMS).In this reg.rd,a number of drug. have been approved as disease-modifying.therapies for MS by US Food and Drug.Administration and European Medicines Ag.ncies(Box 1).

关键词： drug. impaired irreversible

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Orig.ns of perturbations in dayside equatorial g.ound mag.etog.ams

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Earth and Planetary Physics 2024年第1期8卷 215-221页

作者： Syau-Yun W.Hsieh David g.Sibeck The Johns Hopkins University Applied Physics Laboratory LaurelMarylandUSA NASA g.ddard Space Flig.t Center GreenbeltMarylandUSA

To determine the cause(s)of perturbations seen in dayside equatorial g.ound mag.etog.ams,we conducted a systematic survey of simultaneous g.ound-based and g.osynchronous satellite-based observations during.the 90-day period from December 1,2020 to February 28,*** examined Huancayo g.ound mag.etometer observations from 14:00:00 to 20:00:00 UT each day,during.which Huancayo passed throug. local *** those data we chose perturbation events selected on the basis of larg.(>20 nT)event amplitude and classified the selected events as responding.primarily to solar wind pressure,or to variations in the north/south component of the interplanetary mag.etic field(IMF Bz),or perhaps in part to *** results show that an equivalent number of events were identified for each model during.this 90-day *** in the lag.ed solar wind dynamic pressure routinely correspond to nearly simultaneous sudden impulses recorded at both g.osynchronous orbit and on the *** in IMF Bz produce erosion sig.atures at g.osynchronous orbit and can correspond to g.ound events if lag.times for reconnection to enhance convection in the mag.etosphere are taken into account.

关键词： dayside mag.etosphere dayside equatorial ionosphere g.osynchronous mag.etic field

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