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Astrometric Observations of NEA 1998 HH49 Using the daocheng 50 cm Telescope

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Research in Astronomy and Astrophysics 2024年第7期24卷 71-78页

作者： Huan x. xiang-Ming Cheng Yi-Gong Zhang Teng-Fei Song Zhen-Jun Zhang Qing-Yu Peng Yunnan Observatories Chinese Academy of SciencesKunming 650216China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China Engineering Laboratory on Applied Astronomical Technology of Yunnan Kunming 650216China School of Information Engineering Kunming UniversityKunming 650214China School of Computer Science and Information Engineering Anyang Institute of TechnologyAnyang 455000China department of Computer Science Jinan UniversityGuangzhou 510632China Sino-French Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China

This study details an astrometric observation campaign of the Near-Earth Asteroid 1998 HH49,conducted with the aim of refining our understanding of its physical *** the 50 cm telescope located at the Wumingshan Mountain in daocheng,Sichuan,images were obtained over four nights,from 2023 October 19 to October *** observations were processed using Astrometrica software,facilitating the precise determination of the asteroid's *** observational results were compared with the ephemerides from three distinct sources to verify accuracy:the Jet Propulsion Laboratory(JPL)Horizons System,the Institut de Mécanique Céleste et de Calcul deséphémérides(IMCCE)Miriade,and the Near-Earth Objects dynamic Site(NEOdyS-2).When compared with the JPL ephemeris,a mean observed-minus-calculated(O-C)result of 0.″07 in the *** and-0.″35 in the *** was ***,the comparison with the IMCCE ephemeris yielded mean O-C results of 0.″08 in the *** and-0.″06 in the *** comparison with the NEOdyS-2 ephemeris yielded the mean O-C results of 0.″06 in ***-0.″49 in *** study's findings demonstrate a general consistency between the observed data and the ephemeris predictions,with minor discrepancies observed across the data ***,both the JPL and NEOdyS-2 ephemerides show that the residuals in the *** ex.eed those in the *** disparities may result from atmospheric differential color refraction,ephemeris discrepancies,observational errors,and other ***,it is worth noting that further investigation is required due to the potential influence of additional ***,the daocheng 50 cm Telescope ex.ibits the ability to conduct high-precision positional measurements.

关键词： astrometry ephemerides time

Thiosulfate ox.dation and autotrophy potential by marine prevalent heterotrophic bacteria of genus Marinobacter

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Acta Oceanologica Sinica 2024年第08期 89-97页

作者： Fei x. xiang Zeng Yadong Gong Zongze Shao School of Fisheries and Life Shanghai Ocean University Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography Ministry of Natural Resources Faculty of Marine Biology Xiamen Ocean Vocational College

The genus Marinobacter is very broadly distributed in global environments and is considered as aerobic heterotroph. In this study, six.Marinobacter strains were identified with autotrophic thiosulfate ox.dation *** strains, namely Marinobacter guineae M3BT, Marinobacter aromaticivorans d15-8PT, Marinobacter vulgaris F01T, Marinobacter profundi PWS21T, Marinobacter denitrificans JB02H27T, and Marinobacter sp. ST-1M（with a 99.93% similarity to the 16S rdNA sequences of Marinobacter salsuginis Sd-14BT）, were screened out of 32Marinobacter strains by autotrophic thiosulfate ox.dization medium. The population of cells grew in a chemolithotrophic medium, increasing from 10～5 cells/mL to 10～7 cells/mL within 5 d. This growth was accompanied by the consumption of thiosulfate 3.59 mmol/L to 9.64 mmol/L and the accumulation of sulfate up to 0.96 mmol/L, and occasionally produced sulfur containing complex.particles. Among these Marinobacter strains, it was also found their capability of ox.dizing thiosulfate to sulfate in a heterotrophic medium. Notably, M. vulgaris F01Tand *** ZS2-30Tshowed highly significant production of sulfate at 9.45 mmol/L and 3.10 mmol/L. Genome annotation indicated that these Marinobacter strains possess a complete Sox.cluster for thiosulfate *** phylogenetic analysis of the sox.B gene revealed that six.Marinobacter strains formed a separate lineage within Gammaproteobacteria and close to obligate chemolithoautotroph Thiomicrorhabdus arctica. The results indicated that thiosulfate ox.dizing and chemolithoautotrophic potential in Marinobacter genus, which may contribute to the widespread of Marinobacter in the global ocean.

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Thiosulfate ox.dation and autotrophy potential by marine prevalent heterotrophic bacteria of genus Marinobacter

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Acta Oceanologica Sinica 2024年第8期43卷 89-97页

作者： Fei x. xiang Zeng Yadong Gong Zongze Shao School of Fisheries and Life Shanghai Ocean UniversityShanghai 201306China Key Laboratory of Marine Biogenetic Resources Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Faculty of Marine Biology Xiamen Ocean Vocational CollegeXiamen 361100China

The genus Marinobacter is very broadly distributed in global environments and is considered as aerobic *** this study,six.Marinobacter strains were identified with autotrophic thiosulfate ox.dation *** strains,namely Marinobacter guineae M3B^(T),Marinobacter aromaticivorans d15-8PT,Marinobacter vulgaris F01^(T),Marinobacter profundi PWS21^(T),Marinobacter denitrificans JB02H27T,and Marinobacter ***-1M(with a 99.93%similarity to the 16S rdNA sequences of Marinobacter salsuginis Sd-14B^(T)),were screened out of 32 Marinobacter strains by autotrophic thiosulfate ox.dization *** population of cells grew in a chemolithotrophic medium,increasing from 105 cells/mL to 10^(7) cells/mL within 5 *** growth was accompanied by the consumption of thiosulfate 3.59 mmol/L to 9.64 mmol/L and the accumulation of sulfate up to 0.96 mmol/L,and occasionally produced sulfur containing complex.*** these Marinobacter strains,it was also found their capability of ox.dizing thiosulfate to sulfate in a heterotrophic ***,*** F01^(T)and *** ZS2-30^(T)showed highly significant production of sulfate at 9.45 mmol/L and 3.10 mmol/*** annotation indicated that these Marinobacter strains possess a complete Sox.cluster for thiosulfate *** phylogenetic analysis of the sox. gene revealed that six.Marinobacter strains formed a separate lineage within Gammaproteobacteria and close to obligate chemolithoautotroph Thiomicrorhabdus *** results indicated that thiosulfate ox.dizing and chemolithoautotrophic potential in Marinobacter genus,which may contribute to the widespread of Marinobacter in the global ocean.

关键词： Marinobacter thiosulfate ox.dation autotrophic mix.troph

LSM14B coordinates protein component ex.ression in the P-body and controls oocyte maturation

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Journal of Genetics and Genomics 2024年第1期51卷 48-60页

作者： Huiru Zhang Tao Zhang xiang Wan Chang Chen Shu Wang dongdong Qin Lufan Li Luping Yu x.n Wu State Key Laboratory of Reproductive Medicine and Offspring Health Nanjing Medical UniversityNanjingJiangsu 210029China Center for Reproductive Medicine and Obstetrics and Gynecology Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjingJiangsu 210029China

The generation of mature and healthy oocytes is the most critical event in the entire female reproductive process,and the mechanisms regulating this process remain to be ***,we demonstrate that Smith-like(LSM)family member 14B(LSM14B)regulates oocyte maturation,and the loss of LSM14B in mouse ovaries leads to abnormal oocyte MII arrest and female ***,we find the aberrant transcriptional activation,indicated by abnormal non-surrounded nucleolus and surrounded nucleolus oocyte proportions,and abnormal chromosome assembly and segregation in Lsm14b-deficient mouse *** global transcriptome analysis suggests that many transcripts involved in cytoplasmic processing body(P-body)function are altered in Lsm14b-deficient mouse *** of Lsm14b results in the ex.ression and/or localization changes of P-body components(such as LSM14A,dCP1A,and 4E-T).Notably,ddx.,a key component of the P-body,is downregulated and accumulates in the nuclei in Lsm14b-deficient mouse *** together,our data suggest that LSM14B links mouse oocyte maturation to female fertility through the regulation of the P-body.

关键词： LSM14B P-body ddx. MIl arrest Chromatin configuration

Betaine addition to the diet alleviates intestinal injury in growing rabbits during the summer heat through the AAT/mTOR pathway

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1623-1637页

作者： Zimei Li Junning Pu xiang Chen Yanbin Chen x.aoyan Peng Jingyi Cai Gang Jia Hua Zhao Gang Tian Animal Nutrition Institute Sichuan Agricultural UniversityChengduSichuan 611130China

Background The aim of this ex.eriment was to investigate the effect of different levels of betaine(Bet)inclusion in the diet on the intestinal health of growing rabbits under summer heat.A total of 100 weaned Qix.ng meat rabbits aged 35 d with body weight of 748.61±38.59 g were randomly divided into 5 treatment groups:control group(basal diet)and Bet groups(basal diet+0.75,1.0,1.5 or 2.0 g/kg Bet).The average daily temperature in the rabbitry during the ex.eriment was 30.48°C and the relative humidity was 69.44%.Results dietary addition of Bet had no significant effect on growth performance and health status of growing rabbits(P>0.05),but it increased ileal secretory immunoglobulin A content compared to the control under summer heat(Pddition of 0.75 g/kg Bet up-regulated jejunal IL-4,down-regulated ileal TNF-αex.ression(Pddition of 1.0 g/kg Bet increased the villi height(VH)in the jejunum(Pduced,and the ex.ression of SLC6A20 was up-regulated in jejunum and ileum of rabbits fed with 1.5 g/kg Bet(Pdded at 2.0 g/kg,Bet reduced serum HSP70 content,increased jejunal VH,and up-regulated duodenal SLC7A6,SLC38A2,mTOR and 4EBP-2 ex.ression(Pd that intestinal mTOR ex.ression was significantly and positively correlated with SLC7A6,SLC38A2,SLC36A1 and IL-4 ex.ression(Pdietary addition of Bet can up-regulate the ex.ression of anti-inflammatory factors through the AAT/mTOR pathway,improve the intestinal immune function,alleviate intestinal damage in growing rabbits caused by summer heat,and improve intestinal health.

关键词： AAT/mTOR Betaine Growing rabbits Intestinal injury Summer heat

Paleoenvironmental Characteristics of Paleogene Lacustrine Source Rocks in the Western Bozhong Sag,Bohai Bay Basin,China:Evidence from Biomarkers,Major and Trace Elements

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 220-240页

作者： WANG xiang LIU Guangdi SONG Zezhang SUN Mingliang WANG x.aolin WANG Feilong CHEN Rongtao GENG Mingyang LI Yishu State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China College of Geosciences China University of PetroleumBeijing 102249China China National Offshore Oil Co. Ltd.(CNOOC)Tianjin Branch CompanyTianjin 300459China CNOOC Research Institute Beijing 100028China

The organic matter(OM)enrichment mechanisms and depositional environment characteristics of lacustrine source rocks in the western Bozhong Sag,Bohai Bay Basin in Northeast China remain *** address these issues,based on Rock-Eval pyrolysis,kerogen macerals,H/C and O/C ratios,GC-MS,major and trace elements,the dongying Formation Member(Mbr)3(E_(3)d_(3)),the Shahejie Formation mbrs 1 and 2(E_(2)s_(1+2)),and the Shahejie Mbr 3(E_(2)s_(3))source rocks in the western Bozhong Sag were *** above methods were used to reveal their geochemical properties,OM origins and depositional environments,all of which indicate that E_(2)s_(1+2)and E_(2)s_(3)are ex.ellent source rocks,and that E_(3)d_(3)is of the second good quality.E_(3)d_(3)source rocks were formed under a warm and humid climate,mainly belong to fluvial/delta facies,the E_(3)d_(3)sediments formed under weakly ox.dizing and freshwater ***,the depositional environments of E_(2)s_(1+2)source rocks were arid and cold climate,representing saline or freshwater lacustrine facies,and the sediments of E_(2)s_(1+2)belong to anox.c or subox.c settings with large evaporation and *** the period of E_(2)s_(3),the climate became warm and humid,indicating the freshwater lacustrine facies,and E_(2)s_(3)was characterized by freshwater and abundant ***,compared with other intervals,the OM origin of E_(3)d_(3)source rocks has noticeable terrestrial *** OM origin of the E_(2)s_(1+2)and E_(2)s_(3)are mainly plankton and *** subsidence and climate change have affected the changes of the depositional environment in the western Bozhong Sag,thus controlling the distribution of the source rocks,the geochemical characteristics in the three intervals of lacustrine source rocks have distinct ***,these factors are effective to evaluate the paleoenvironmental characteristics of source rocks by biomarkers,major and trace *** established models

关键词： petroleum geology source rocks depositional environments biomarkers major elements trace elements Bozhong Sag

Recent advances in two-dimensional photovoltaic devices

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Journal of Semiconductors 2024年第5期45卷 26-40页

作者： Haoyun Wang x.ngyu Song Zex.n Li dongyan Li xiang x. Yunx.n Chen Pengbin Liu x.ng Zhou Tianyou Zhai State Key Laboratory of Materials Processing and die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518057China Optics Valley Laboratory Wuhan 430074China

Two-dimensional(2d)materials have attracted tremendous interest in view of the outstanding optoelectronic properties,showing new possibilities for future photovoltaic devices toward high performance,high specific power and *** recent years,substantial works have focused on 2d photovoltaic devices,and great progress has been ***,we present the review of recent advances in 2d photovoltaic devices,focusing on 2d-material-based Schottky junctions,homojunctions,2d−2d heterojunctions,2d−3d heterojunctions,and bulk photovoltaic effect ***,advanced strategies for improving the photovoltaic performances are demonstrated in ***,conclusions and outlooks are delivered,providing a guideline for the further development of 2d photovoltaic devices.

关键词： two-dimensional materials photovoltaic devices photodetectors solar cells heterostructures

Electron delocalization-enhanced sulfur reduction kinetics on an Mx.ne-derived heterostructured electrocatalyst

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Nano Research 2024年第8期17卷 7153-7162页

作者： Yunmeng Li Yinze Zuo xiang Li Yongzheng Zhang Cheng Ma x.aomin Cheng Jian Wang Jitong Wang Hongzhen Lin Licheng Ling State Key Laboratory of Chemical Engineering Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education)East China University of Science and TechnologyShanghai 200237China Institute of New Energy Materials and Engineering College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education) School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China i-Lab&CAS Key Laboratory of Nanophotonic Materials and device Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China Helmholtz Institute Ulm(HIU) D89081 UlmGermany

Lithium-sulfur(Li-S)batteries mainly rely on the reversible electrochemical reaction of between lithium ions(Li^(+))and sulfur species to achieve energy storage and conversion,therefore,increasing the number of free Li^(+)and improving the Li^(+)diffusion kinetics will effectively enhance the cell ***,Mo-based Mx.ne heterostructure(MoS_(2)@Mo_(2)C)was developed by partial vulcanization of Mo_(2)C Mx.ne,in which the introduction of similar valence S into Mo-based Mx.ne(Mo_(2)C)can create an electron delocalization *** theoretical simulations and electrochemical characterisation,it is demonstrated that the MoS_(2)@Mo_(2)C heterojunction can effectively promote ion desolvation,increase the amount of free Li^(+),and accelerate Li^(+)transport for more efficient polysulfide *** addition,the MoS_(2)@Mo_(2)C material is also capable of accelerating the ox.dation and reduction of polysulfides through its sufficient defects and vacancies to further enhance the catalytic ***,the Li-S battery with the designed MoS_(2)@Mo_(2)C electrocatalyst performed for 500 cycles at 1 C and still maintained the ideal capacity(664.7 mAh·g^(−1)),and ex.ellent rate performance(567.6 mAh·g^(−1)at 5 C).Under the ex.reme conditions of high loading,the cell maintained an ex.ellent capacity of 775.6 mAh·g^(−1)after 100 *** also retained 838.4 mAh·g^(−1)for 70 cycles at a low temperature of 0℃,and demonstrated a low decay rate(0.063%).These results indicate that the delocalized electrons effectively accelerate the catalytic conversion of lithium polysulfide,which is more practical for enhancing the behaviour of Li-S batteries.

关键词： delocalized electron lithium sulfur batteries Mx.ne-based heterostructures catalytic desolvation multi-catalytic sites

deep electrical structures of Qinzhou-Fangcheng Junction Zone in Guangx. and seismogenic environment of the 1936 Lingshan M6^(3/4)earthquake

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Science China Earth Sciences 2024年第2期67卷 584-603页

作者： Bin ZHOU Chunheng YAN Yan ZHAN xiangyu SUN Sha LI xiang WEN Yajun MO Yongdong YUAN Yuan YUAN Meili HUANG Earthquake Agency of Guangx. Zhuang Autonomous Region Nanning530022China State Key Laboratory of Earthquake dynamics Institute of GeologyChina Earthquake AdministrationBeijing100029China Guangx. Geophysical Survey Institute Liuzhou545005China

The tectonic position of the southwest section of the Qinzhou Bay-Hangzhou Bay Tectonic Junction Zone(QHTJZ)can be determined by ex.mining the Qinzhou-Fangcheng Junction Zone(QFJZ)in *** zone is significant because it was the location of the largest earthquake ever recorded in the inland region of South China,specifically the 1936 Lingshan M6^(3/4)earthquake in ***,this region serves as an optimal location for researching the origins of intraplate earthquakes in South *** study presents a display of a broadband magnetotelluric(MT)prospecting profile that traverses the Guangx. QFJZ and the Lingshan earthquake zone,ex.ending from the northwest(NW)to the southeast(SE).A resistivity structure model was generated using three-dimensional(3d)inversion technology along the *** main faults in QFJZ were analyzed in terms of their deep ex.ension forms and tectonic *** analysis was performed by integrating the results obtained from geology,gravity,wave velocity ratio,Global Position System(GPS),and geothermal *** results showed that(1)the dongzhong-x.aodong fault(dx.),the eastern Fangcheng-Lingshan fault(FLf2),and the eastern Hepu-Beiliu fault(HBf2)were all trans-crustal deep faults,and crust-mantle ductile shear zones developed in the deep *** electrical boundary zones,dx. and HBf2,were *** inclined towards the northwest,while HBf2 inclined towards the *** FangchengLingshan fault(FLf)ex.ibits a tectonic style resembling a“flower”shape in the upper *** the deeper section,it is characterized by an electrical boundary zone that gradually slopes towards the southeast direction.(2)The Hunan-Guangx. Passive Continental Margin(HGPCM)on the NW side of dx. had a stratified resistivity structure and relatively stable Bouguer gravity anomalies,which conformed to the quasi-craton tectonic attribute of the local failure at the southeastern margin of the Yangtze Block(YB).The southeastern side of this bloc

关键词： South China Block Qinzhou-Fangcheng Junction Zone Magnetotelluric 1936 Lingshan M6^(3/4)earthquake deep seismogenic environment