The ideology of being ready to make innovation and keeping abreast of the times is a defining feature of the Chinese civilization.IN several of his recent speeches President Xi Jinping stressed that the Chinese civili...The ideology of being ready to make innovation and keeping abreast of the times is a defining feature of the Chinese civilization.IN several of his recent speeches President Xi Jinping stressed that the Chinese civilization has the tradition of discarding the outdated in favor of the new and moving ahead with the times.In exploring a new philosophy that is suitable for governing China in the new era,China draws on its fine traditional culture to find ways of abolishing outdated ideas and making theoretical,practical,and institutional innovations,thus staying abreast of the time to create a better future.展开更多
Three sediment cores were collected in November 2003 from Dagu estuary to Qikou estuary. The main polluted heavy metals in the sediment of tidal zones for the Bohai Bay have been found by analyzing the relationship am...Three sediment cores were collected in November 2003 from Dagu estuary to Qikou estuary. The main polluted heavy metals in the sediment of tidal zones for the Bohai Bay have been found by analyzing the relationship among the contents of heavy metals, the contents of geochemical elements （Fe, AI and Mn） and the size of grain. The dominating contaminative elements in tidal sediments of Bohai Bay are Pb, Zn and Cd. Their contents are higher than the corresponding upper limit of environmental background values and they have very faint correlation with the corresponding contents of geochemical elements and the size of grain, indicating the anthropogenic enrichment. Especially, the preliminary study on the pollution sources and the history of heavy metals in the Dagu estuary has been done using the dated results. The contamination by Zn and Cd also started in the middle 1950s, while the contamination by Pb appeared in the early 1940s. The pollution by Zn and Cd mainly originate from sewage discharge, while the pollution by Pb has many sources, like atmosphere deposition and industrial discharRe.展开更多
Acta Geologica Sinica（English Edition） is indexed by SCI,with the impact factors ranging from 1.5 to 2.15,and also indexed by CA,the Bibliography and Index of Geology（BIG）,Biological Abstracts,and Geographical Abs...Acta Geologica Sinica（English Edition） is indexed by SCI,with the impact factors ranging from 1.5 to 2.15,and also indexed by CA,the Bibliography and Index of Geology（BIG）,Biological Abstracts,and Geographical Abstracts and many others.Internationally,Acta Geologica Sinica（English Edition）has been cooperated with Willey-BlackwellPublishing Corporation,and has all the papers published online.Acta Geologica Sinica（English Edition）has two submission websites at： http：//mc.manuscriptcentral.com/ags for international authors and http：//www.geojournals.cn/ dzxben/ch/index.aspx for Chinese authors. Authors can submit, inquire and download papers at either website.展开更多
Former Chinese leader Deng Xiaoping was known as the chief architect of China’s reform and opening-up drive,and his inspection tour of southern China in 1992 ushered in a new chapter of history characterized by“thre...Former Chinese leader Deng Xiaoping was known as the chief architect of China’s reform and opening-up drive,and his inspection tour of southern China in 1992 ushered in a new chapter of history characterized by“three sustainables”:sustainable economic development,sustainable social stability,and sustainable institutional support and leadership.Fundamentally,the“three sustainables”deftly balanced relationships among economic,social,and political entities.Enterprises represent economic entities,the people are the social entity,and the CPC is the political entity.How exactly has the CPC promoted the modernity of China?展开更多
By using echoes in some sonnets to lines in certain plays, emphasizing those echoes which were not later repeated, and by applying dates to those plays, in 1926 Elizabeth Beckwith tentatively dated a third of the 154 ...By using echoes in some sonnets to lines in certain plays, emphasizing those echoes which were not later repeated, and by applying dates to those plays, in 1926 Elizabeth Beckwith tentatively dated a third of the 154 in the entire sonnets cycle. Her belief was that an unintentional authorial pattern of usage would be less subjective than other approaches to dating the sonnets. Yet, by use of dates from external allusions later applied by Prof. Leslie Hotson and other scholars, this author suggests that it may be possible to extend the total number of datable sonnets to over half of the cycle. However, Beckwith did not use dates for the plays which were later to become a standard dating scheme accepted by most scholars today, and so adjustments of her dates would change the dates she awarded to many of her selected sonnets. This author suggests that even the standard dating scheme is flawed, particularly if Shakespeare was dead when the Sonnets were published in 1609. He suggests another dating regime that meshes quite well with both Beckwith＇s 52 and an additional 27. Thus, the result for the 79 sonnets is to avoid certain problems in the distribution that Beckwith＇s method generated. The net result is what Beckwith termed ＂a skeleton around which the remaining sonnets can be safely built＂, but for over half rather than only a third of the cycle. This author suggests a half＂skeleton＂ is more indicative of the chronology for the whole sonnets cycle than only a third.展开更多
The dietary polyphenolic compounds resveratrol and quercetin prevent neurodegenerative diseases in experimental models;however, they reach the brain only in nanomolar concentrations in the glucuronidated and sulfated ...The dietary polyphenolic compounds resveratrol and quercetin prevent neurodegenerative diseases in experimental models;however, they reach the brain only in nanomolar concentrations in the glucuronidated and sulfated forms, and not as the aglycone parent form(Pasinetti et al.,2015).展开更多
The journal Chemical Research in Chinese Universities is a comprehensive academic journal in the field of chemistry,published bimonthly since 1984.The journal publishes research articles,letters/communications and rev...The journal Chemical Research in Chinese Universities is a comprehensive academic journal in the field of chemistry,published bimonthly since 1984.The journal publishes research articles,letters/communications and reviews written by faculty members,researchers and postgraduates in universities,colleges and research institutes all over China and overseas.It reports the latest and the most creative results of important fundamental research in all aspects of chemistry and of developments with significant consequences across sub-disciplines.This journal is sponsored by Jilin University and mandated by the Ministry of Education of P.R.China.展开更多
Neuroscience is the ultimate frontier in our quest for a comprehensive understanding of human behavior. Since its launch in 2009, the Human Connectome Project has emerged as a pioneering force, making heroic strides i...Neuroscience is the ultimate frontier in our quest for a comprehensive understanding of human behavior. Since its launch in 2009, the Human Connectome Project has emerged as a pioneering force, making heroic strides in elucidating the intricate correlation between structural information and the functioning of the human brain.展开更多
0 INTRODUCTION Uraninite and pitchblende are the most important ore minerals in nearly all types of uranium deposits.Therefore,the U-Pb isotopic system of uraninite and pitchblende are widely used in dating uranium de...0 INTRODUCTION Uraninite and pitchblende are the most important ore minerals in nearly all types of uranium deposits.Therefore,the U-Pb isotopic system of uraninite and pitchblende are widely used in dating uranium deposits.展开更多
The Jianglang Dome has integral tectonostratigraphic units and contains a suite of high-grade stratiform Cu deposits.However,the formation mechanism of this dome and genetic model of Cu mineralization remain a matter ...The Jianglang Dome has integral tectonostratigraphic units and contains a suite of high-grade stratiform Cu deposits.However,the formation mechanism of this dome and genetic model of Cu mineralization remain a matter of debate.The resolution of these problems hinges on the presence of magmatic intrusions in the core.Here,we report bulk geochemical and zircon U-Pb data of a newly discovered syenite intrusion as well as chalcopyrite Re-Os dating results.We aim to explore genesis of the Jianglang Dome,genetic model of the stratiform Cu deposits,and rare metal mineralization potential of the syenite intrusion.The dated syenite sample yields an emplacement age of 207.1±2.0 Ma,which matches post-collisional extension in the Songpan-Ganze Orogen.The syenite rocks have average high(Zr+Nb+Ce+Y)concentrations of 512 ppm,10000.Ga/Al ratios of 3.97,and crystallization temperatures of 827°C,together with low Mg#values of 1.73;they fi t the A-type granitoid defi nition and a crustal origin.Chalcopyrite separates yield a Re-Os isochron age of 207.1±5.3 Ma,which markedly postdates the formation age of their orehosting rocks(the Liwu Group,ca.553 Ma).Our new age determination,together with previous chalcopyrite Re–Os isochron age of ca.151.1 Ma and sulfi de sulfur isotope(δ^(34)S_(V-CDT)=8.7‰–5.6‰)and tourmaline boron isotope(δ^(11)B=−15.47‰to−5.91‰)data,confi rms multistage epigenetic Cu mineralization related to magmatic-hydrothermal fl uids.Compared with regional ca.209–207 Ma fertile granitoids,the studied syenite intrusion shows unevolved and barren affi nities and negligible rare metal mineralization potential.Combined with residual gravity low anomalies in the core of the Jianglang Dome,which suggest a large deepseated granitic batholith,we prefer thermal doming resulting from magma-induced uplift for the nature of this dome.展开更多
1.Objective,The Cretaceous succession is characteristic of the aeolian sedimentary system in the Ordos Basin,which is the major ore-bearing layer for the sandstone-type uranium deposits.Based on the research of paleon...1.Objective,The Cretaceous succession is characteristic of the aeolian sedimentary system in the Ordos Basin,which is the major ore-bearing layer for the sandstone-type uranium deposits.Based on the research of paleontology and magnetostratigraphy,formers believed it belonged to the Early Cretaceous(Huang YB,2010).However,the lack of intrusions or volcanic rocks for isotopic dating results in an unclear formation age for the Lower Cretaceous succession.Recently,tuffs were firstly discovered in the Luohandong Formation in the Zhenyuan area,Gansu Province,located in the southwestern Ordos Basin,China.The LA-ICP-MS zircon U-Pb dating of tuffs was carried out.The new ages can precisely constrain the depositional age of the Luohandong Formation and also provide significant indications for the study of regional volcanic activities,paleoclimate,basin evolution,and tectonic setting.展开更多
The opening of the Central South Atlantic and the consequent formation of the eastern Brazilian continental margin was marked by a complex history of mafic magmatism,carbonate sedimentation,and deposition of a thick s...The opening of the Central South Atlantic and the consequent formation of the eastern Brazilian continental margin was marked by a complex history of mafic magmatism,carbonate sedimentation,and deposition of a thick salt layer.The carbonates underlying the salt layer(pre-salt carbonates)were formed in restricted lacustrine basins.Here,the timing and fluid sources of deposition,diagenetic,and hydrothermal alterations of the pre-salt carbonate rocks are defined through in-situ U-Pb dating,87Sr/86Sr,and trace element analyses of samples from the Santos Basin.The very alkaline nature of the Aptian lake(s)produced characteristically unique and widely distributed carbonate rocks such as Mg-clays with calcite spherulite and calcite crystal shrub limestones transitioning laterally and vertically into travertines formed by hydrothermal pulses during basin evolution.Hydrothermalism caused extensive replacement,dissolution,and calcite cementation.REE+Y PAAS-normalised patterns and 87Sr/86Sr ratios indicate that deposition/eo-diagenesis of the primary carbonates occurred in a lacustrine environment primarily controlled by evaporation,pH,and continental water source,with 2%–10%hydrothermal fluid input.Trace elements and Sr-isotope of travertines and burial diagenetic phases show that they are produced from a hot mixture of mafic/mantle-derived fluids and dissolution/alteration of older carbonate formations.U-Pb dating indicates that carbonate deposition occurred between 124.8±2.6 Ma and 120.0±1.6 Ma,earlier than previously proposed,followed closely by the circulation of hydrothermal fluids.Replacement and cementation ages range from 120.5±2.4 Ma to 80.4±2.4 Ma.展开更多
The ancient Neo-Tethyan region underwent profound tectonic transformations,including the orogenesis of the Xizang Plateau and the westward retreat and ultimate closure of the Neo-Tethyan Ocean.These events significant...The ancient Neo-Tethyan region underwent profound tectonic transformations,including the orogenesis of the Xizang Plateau and the westward retreat and ultimate closure of the Neo-Tethyan Ocean.These events significantly influenced the diversification and biogeography of aquatic animals.However,the impact of these large-scale sea-land shifts on the long-range evolutionary history of terrestrial fauna remains unclear.This study investigated how geological changes in the Neo-Tethyan region shaped the evolutionary trajectories and dispersal patterns of Pholcus sensu lato cellar spiders across the Old World.Molecular dating,ancestral area reconstructions,and diversity analyses were conducted using sequences from seven genes across 234 samples representing 209 species.Results indicated that these spiders originated in the eastern Neo-Tethyan region during the Early Eocene,with their subsequent diversification driven by a series of concomitant geological events.The Eurasian(ER)Group dispersed into Europe following the westward retreat of the Neo-Tethyan Ocean in the Early Miocene,while the African(AF)Group migrated into Africa via the Arabian Plate land bridge following the closure of the Neo-Tethyan Ocean in the Oligocene.The East Asian(EA)Group,which expanded along the southeastern margin of the Himalayas,experienced explosive diversification in response to sustained orogenesis at the Eocene-Oligocene boundary.These findings illustrate how large-scale geological processes and sea-land changes shaped the evolutionary history of terrestrial fauna in the Neo-Tethyan region.展开更多
Rice,a critical global staple crop,relies heavily on heading date,a key agronomic trait marking the transition from vegetative to reproductive growth.Understanding the genetic regulation of heading date is vital for e...Rice,a critical global staple crop,relies heavily on heading date,a key agronomic trait marking the transition from vegetative to reproductive growth.Understanding the genetic regulation of heading date is vital for enhancing the adaptability of high-quality rice varieties across diverse geographical regions and for bolstering local food security.In this study,we uncovered a novel role for OsCATA,a catalase gene,in the regulation of photoperiodic flowering in rice.We identified a novel allele of OsELF3.1,whose mutation resulted in delayed heading.Further analyses revealed that OsELF3.1 physically interacted with OsCATA.Notably,OsCATA exhibited rhythmic expression patterns similar to OsELF3.1 and,when mutated,also delayed flowering.Expression analyses showed that the delayed heading phenotype could be attributed to elevated Ghd7 expression under both long-day and short-day conditions,with OsCATA expression positively regulated by OsELF3.1.Double mutants of OsELF3.1 and OsCATA displayed a heading delay similar to that of oself3.1 single mutants.Additionally,OsELF3.1 could interact with Ghd7 in vivo,alleviating its suppression of Ehd1.Luciferase assays confirmed that Ghd7 repressed Ehd1 expression,while OsELF3.1 mitigated this repression.Collectively,our findings reveal that OsCATA is critical in suppressing Ghd7 expression through the OsELF3.1-OsCATA-Ghd7 transcriptional pathway,thereby regulating rice heading.展开更多
Birch mice(family Sicistidae)are small dipodoid rodents distributed in regions surrounding the Qinghai-Xizang Plateau and extending across the Palearctic.In China,members of the genus Sicista are rarely recorded,and t...Birch mice(family Sicistidae)are small dipodoid rodents distributed in regions surrounding the Qinghai-Xizang Plateau and extending across the Palearctic.In China,members of the genus Sicista are rarely recorded,and their systematics remain poorly resolved.As part of the Second Xizang Plateau Expedition by the Kunming Institute of Zoology,Chinese Academy of Sciences,systematic surveys conducted in southern Xizang and the western Tianshan Mountains yielded two previously unrecognized species.Two specimens from southern Xizang were found to occupy a deeply divergent phylogenetic position within Sicistidae.Morphological assessments and molecular phylogenetic analyses of both extant and fossil Sicistidae,along with total-evidence dating and ancestral distribution reconstruction,identified these specimens as representatives of an ancient extant lineage that diverged from Sicista approximately 20.38 million years ago.This lineage is designated as a new genus,defined by the new species Breviforamen shannanensis gen.et sp.nov.Furthermore,11 specimens from the Tianshan Mountains are described as a second new species,Sicista brevicauda sp.nov.,based on diagnostic morphological and genetic features.Ancestral distribution reconstructions,combined with fossil records,indicate an early Miocene origin for Sicistidae across a broad region spanning the“Gobi”Desert to parts of North America.Climatic deterioration and increasing desertification during the mid-Miocene likely drove southward dispersal of Breviforamen gen.nov.into southern Xizang prior to the complete formation of the Yarlung Zangbo River.Overall,these findings broaden current understanding of Sicistidae diversity,elucidate the origin and dispersal patterns of the family,and highlight the presence of an ancient relict lineage in China.展开更多
The tectonic evolution of Borneo and the affiliation between Southern and Northern Borneo remains unclear.The Rajang and Crocker Fan sediments,as one of the largest ancient submarine fans in Southeast Asia have witnes...The tectonic evolution of Borneo and the affiliation between Southern and Northern Borneo remains unclear.The Rajang and Crocker Fan sediments,as one of the largest ancient submarine fans in Southeast Asia have witnessed the tectonic evolution of Borneo since at least the late Mesozoic.In this study,we present laser ablation inductively coupled plasma mass spectrometer(LA-ICP-MS)U-Pb dating and Hf isotopic results of detrital zircons from the Trusmadi and Crocker formations within the Crocker Fan of Sabah,Northern Borneo.Our results,coupled with previous data,show that the Crocker Fan sediments in Sabah of Northern Borneo display similar age spectra to the Rajang Fan sediments in Sarawak of Central Borneo,with two major age clusters at 130-80 and 280-200 Ma.Further provenance analysis based on mineral shape with a prismatic characteristic and similar detrital zircon Hf isotopes of the two formations illustrates that the Jurassic-Cretaceous and partly Triassic detrital zircons of the Crocker and Rajang Fan sediments were derived from the erosion of contemporaneous magmatic rocks;part of Permian-Triassic ones could be the recycling of the Jurassic deposits in SW Borneo.The initial provenance of these Permian-Triassic detritus could be synchronous magmatic rocks in the Tin belt of the Malay Peninsula.Combining with previous data,we propose that the entire Borneo continent,including both Southern and Northern Borneo,developed a common Mesozoic continental magmatic arc.Moreover,we postulate that the Rajang and Crocker fans formed in a fore-arc extensional rift basin related to the retreat of the subducted Paleo-Pacific Plate beneath the Northern Borneo margin.展开更多
The Ediacaran Period records a significant turning point in the evolution of life on Earth,witnessing the rise to ecological dominance of macroscopic tissue-grade organisms.The Wenghui biota from the Doushantuo Format...The Ediacaran Period records a significant turning point in the evolution of life on Earth,witnessing the rise to ecological dominance of macroscopic tissue-grade organisms.The Wenghui biota from the Doushantuo Formation of South China hosts abundant multicellular algal macrofossils and problematica,some of which might be closely related to taxa from classic Late Ediacaran assemblages from South Australia and the White Sea biota of Russia.However,a lack of well-resolved isotopic age estimates has hampered efforts to constrain the timing of appearance of the Wenghui biota,obfuscating its significance to our understanding of Ediacaran macroevolution in the aftermath of the Snowball Earth events.Here,we present the first SHRIMP zircon U-Pb dating results for samples obtained from a laminated tuff ash layer at the base of the Wenghui biota in the Doushantuo Formation,Jiangkou County,Tongren City,Guizhou Province,China.Our analyses yield an age of 595.4±5.3 Ma for the first appearance of Wenghui biota,suggesting that its appearance postdated that of the Lantian and Weng'an biotas,but preceded that of the Miaohe biota.These newly obtained age proxies offer an independent test of previous isotopic estimates for the age of the Wenghui biota,providing new chronostratigraphic evidence to map the succession of Ediacaran fossil assemblages on the Yangtze Platform during the Doushantuo interval.These data suggest that the Lantian,Weng'an,Wenghui,and Miaohe biotas may record a sequence of biotic assemblages attesting to successive phases in the radiation of Ediacaran macroscopic organisms,particularly macroalgae.展开更多
Protein content plays a crucial role in determining the eating and cooking quality of rice.However,the genetic and molecular basis underlying grain protein content remains to be elucidated.In this study,we identified ...Protein content plays a crucial role in determining the eating and cooking quality of rice.However,the genetic and molecular basis underlying grain protein content remains to be elucidated.In this study,we identified a genomic region associated with grain protein content in rice chromosome segment substitution lines containing the flowering gene Ghd7.1,which reduced grain protein content by repressing the transcription of the gene OsAAP6.Knockout of Ghd7.1 increased grain protein content and decreased the eating and cooking quality of rice.Introduction of the functional haplotype of Ghd7.1 into two elite rice cultivars reduced their protein content and increased their eating quality and grain yield with no effect on the regulation of flowering time.Ghd7.1 might be used for regulating the protein content and improving the eating quality of rice varieties.展开更多
文摘The ideology of being ready to make innovation and keeping abreast of the times is a defining feature of the Chinese civilization.IN several of his recent speeches President Xi Jinping stressed that the Chinese civilization has the tradition of discarding the outdated in favor of the new and moving ahead with the times.In exploring a new philosophy that is suitable for governing China in the new era,China draws on its fine traditional culture to find ways of abolishing outdated ideas and making theoretical,practical,and institutional innovations,thus staying abreast of the time to create a better future.
基金The National Basic Research Program (973) of China (No. 2002CB412409) and the Hi-Tech Research and Development Program(863) of China(No. 2002AA648010)
文摘Three sediment cores were collected in November 2003 from Dagu estuary to Qikou estuary. The main polluted heavy metals in the sediment of tidal zones for the Bohai Bay have been found by analyzing the relationship among the contents of heavy metals, the contents of geochemical elements （Fe, AI and Mn） and the size of grain. The dominating contaminative elements in tidal sediments of Bohai Bay are Pb, Zn and Cd. Their contents are higher than the corresponding upper limit of environmental background values and they have very faint correlation with the corresponding contents of geochemical elements and the size of grain, indicating the anthropogenic enrichment. Especially, the preliminary study on the pollution sources and the history of heavy metals in the Dagu estuary has been done using the dated results. The contamination by Zn and Cd also started in the middle 1950s, while the contamination by Pb appeared in the early 1940s. The pollution by Zn and Cd mainly originate from sewage discharge, while the pollution by Pb has many sources, like atmosphere deposition and industrial discharRe.
文摘Acta Geologica Sinica（English Edition） is indexed by SCI,with the impact factors ranging from 1.5 to 2.15,and also indexed by CA,the Bibliography and Index of Geology（BIG）,Biological Abstracts,and Geographical Abstracts and many others.Internationally,Acta Geologica Sinica（English Edition）has been cooperated with Willey-BlackwellPublishing Corporation,and has all the papers published online.Acta Geologica Sinica（English Edition）has two submission websites at： http：//mc.manuscriptcentral.com/ags for international authors and http：//www.geojournals.cn/ dzxben/ch/index.aspx for Chinese authors. Authors can submit, inquire and download papers at either website.
文摘Former Chinese leader Deng Xiaoping was known as the chief architect of China’s reform and opening-up drive,and his inspection tour of southern China in 1992 ushered in a new chapter of history characterized by“three sustainables”:sustainable economic development,sustainable social stability,and sustainable institutional support and leadership.Fundamentally,the“three sustainables”deftly balanced relationships among economic,social,and political entities.Enterprises represent economic entities,the people are the social entity,and the CPC is the political entity.How exactly has the CPC promoted the modernity of China?
文摘By using echoes in some sonnets to lines in certain plays, emphasizing those echoes which were not later repeated, and by applying dates to those plays, in 1926 Elizabeth Beckwith tentatively dated a third of the 154 in the entire sonnets cycle. Her belief was that an unintentional authorial pattern of usage would be less subjective than other approaches to dating the sonnets. Yet, by use of dates from external allusions later applied by Prof. Leslie Hotson and other scholars, this author suggests that it may be possible to extend the total number of datable sonnets to over half of the cycle. However, Beckwith did not use dates for the plays which were later to become a standard dating scheme accepted by most scholars today, and so adjustments of her dates would change the dates she awarded to many of her selected sonnets. This author suggests that even the standard dating scheme is flawed, particularly if Shakespeare was dead when the Sonnets were published in 1609. He suggests another dating regime that meshes quite well with both Beckwith＇s 52 and an additional 27. Thus, the result for the 79 sonnets is to avoid certain problems in the distribution that Beckwith＇s method generated. The net result is what Beckwith termed ＂a skeleton around which the remaining sonnets can be safely built＂, but for over half rather than only a third of the cycle. This author suggests a half＂skeleton＂ is more indicative of the chronology for the whole sonnets cycle than only a third.
基金supported by NIH grants, NINDS R21 NS116720 and NINDS/NIA RF1 NS130681 (to RG and WJM)。
文摘The dietary polyphenolic compounds resveratrol and quercetin prevent neurodegenerative diseases in experimental models;however, they reach the brain only in nanomolar concentrations in the glucuronidated and sulfated forms, and not as the aglycone parent form(Pasinetti et al.,2015).
文摘The journal Chemical Research in Chinese Universities is a comprehensive academic journal in the field of chemistry,published bimonthly since 1984.The journal publishes research articles,letters/communications and reviews written by faculty members,researchers and postgraduates in universities,colleges and research institutes all over China and overseas.It reports the latest and the most creative results of important fundamental research in all aspects of chemistry and of developments with significant consequences across sub-disciplines.This journal is sponsored by Jilin University and mandated by the Ministry of Education of P.R.China.
文摘Neuroscience is the ultimate frontier in our quest for a comprehensive understanding of human behavior. Since its launch in 2009, the Human Connectome Project has emerged as a pioneering force, making heroic strides in elucidating the intricate correlation between structural information and the functioning of the human brain.
文摘0 INTRODUCTION Uraninite and pitchblende are the most important ore minerals in nearly all types of uranium deposits.Therefore,the U-Pb isotopic system of uraninite and pitchblende are widely used in dating uranium deposits.
基金supported by the National Natural Science Foundation of China(Nos.41902068,42272106)Young Scholars Development Fund of Southwest Petroleum University(No.201499010083)China Geological Survey Project(Nos.DD20230338,DD20242494)。
文摘The Jianglang Dome has integral tectonostratigraphic units and contains a suite of high-grade stratiform Cu deposits.However,the formation mechanism of this dome and genetic model of Cu mineralization remain a matter of debate.The resolution of these problems hinges on the presence of magmatic intrusions in the core.Here,we report bulk geochemical and zircon U-Pb data of a newly discovered syenite intrusion as well as chalcopyrite Re-Os dating results.We aim to explore genesis of the Jianglang Dome,genetic model of the stratiform Cu deposits,and rare metal mineralization potential of the syenite intrusion.The dated syenite sample yields an emplacement age of 207.1±2.0 Ma,which matches post-collisional extension in the Songpan-Ganze Orogen.The syenite rocks have average high(Zr+Nb+Ce+Y)concentrations of 512 ppm,10000.Ga/Al ratios of 3.97,and crystallization temperatures of 827°C,together with low Mg#values of 1.73;they fi t the A-type granitoid defi nition and a crustal origin.Chalcopyrite separates yield a Re-Os isochron age of 207.1±5.3 Ma,which markedly postdates the formation age of their orehosting rocks(the Liwu Group,ca.553 Ma).Our new age determination,together with previous chalcopyrite Re–Os isochron age of ca.151.1 Ma and sulfi de sulfur isotope(δ^(34)S_(V-CDT)=8.7‰–5.6‰)and tourmaline boron isotope(δ^(11)B=−15.47‰to−5.91‰)data,confi rms multistage epigenetic Cu mineralization related to magmatic-hydrothermal fl uids.Compared with regional ca.209–207 Ma fertile granitoids,the studied syenite intrusion shows unevolved and barren affi nities and negligible rare metal mineralization potential.Combined with residual gravity low anomalies in the core of the Jianglang Dome,which suggest a large deepseated granitic batholith,we prefer thermal doming resulting from magma-induced uplift for the nature of this dome.
基金supported by the Science&Technology Fundamental Resources Investigation Program of China(2022FY101800)the National Science Foundation of China(92162212)the International Geoscience Programme(IGCP 675).
文摘1.Objective,The Cretaceous succession is characteristic of the aeolian sedimentary system in the Ordos Basin,which is the major ore-bearing layer for the sandstone-type uranium deposits.Based on the research of paleontology and magnetostratigraphy,formers believed it belonged to the Early Cretaceous(Huang YB,2010).However,the lack of intrusions or volcanic rocks for isotopic dating results in an unclear formation age for the Lower Cretaceous succession.Recently,tuffs were firstly discovered in the Luohandong Formation in the Zhenyuan area,Gansu Province,located in the southwestern Ordos Basin,China.The LA-ICP-MS zircon U-Pb dating of tuffs was carried out.The new ages can precisely constrain the depositional age of the Luohandong Formation and also provide significant indications for the study of regional volcanic activities,paleoclimate,basin evolution,and tectonic setting.
基金C.Lana and F.F.Alkmim benefit from the Brazilian National Research Council(CNPq)research grants 3073353/2019-2 and 311543/2020-0.C.Lana,F.F.Alkmim,and Maria Eugênia Souza are part of the Instituto GeoAtlântico,a National Institute of Science and Technology,CNPq-Brazil process 405653/2022-0We acknowledge Petrobras’s support during the investigation and permission to publish this study.I.Figueiredo acknowledged the Brazilian Federal Agency for Support and Evaluation of Graduate Education(CAPES)for Master's scholarship 88887.816343/2023-00.
文摘The opening of the Central South Atlantic and the consequent formation of the eastern Brazilian continental margin was marked by a complex history of mafic magmatism,carbonate sedimentation,and deposition of a thick salt layer.The carbonates underlying the salt layer(pre-salt carbonates)were formed in restricted lacustrine basins.Here,the timing and fluid sources of deposition,diagenetic,and hydrothermal alterations of the pre-salt carbonate rocks are defined through in-situ U-Pb dating,87Sr/86Sr,and trace element analyses of samples from the Santos Basin.The very alkaline nature of the Aptian lake(s)produced characteristically unique and widely distributed carbonate rocks such as Mg-clays with calcite spherulite and calcite crystal shrub limestones transitioning laterally and vertically into travertines formed by hydrothermal pulses during basin evolution.Hydrothermalism caused extensive replacement,dissolution,and calcite cementation.REE+Y PAAS-normalised patterns and 87Sr/86Sr ratios indicate that deposition/eo-diagenesis of the primary carbonates occurred in a lacustrine environment primarily controlled by evaporation,pH,and continental water source,with 2%–10%hydrothermal fluid input.Trace elements and Sr-isotope of travertines and burial diagenetic phases show that they are produced from a hot mixture of mafic/mantle-derived fluids and dissolution/alteration of older carbonate formations.U-Pb dating indicates that carbonate deposition occurred between 124.8±2.6 Ma and 120.0±1.6 Ma,earlier than previously proposed,followed closely by the circulation of hydrothermal fluids.Replacement and cementation ages range from 120.5±2.4 Ma to 80.4±2.4 Ma.
基金supported by the Science&Technology Fundamental Resources Investigation Program of China(2023FY100200)National Natural Science Foundation of China(NSFC-32430015,32170461,31872193)。
文摘The ancient Neo-Tethyan region underwent profound tectonic transformations,including the orogenesis of the Xizang Plateau and the westward retreat and ultimate closure of the Neo-Tethyan Ocean.These events significantly influenced the diversification and biogeography of aquatic animals.However,the impact of these large-scale sea-land shifts on the long-range evolutionary history of terrestrial fauna remains unclear.This study investigated how geological changes in the Neo-Tethyan region shaped the evolutionary trajectories and dispersal patterns of Pholcus sensu lato cellar spiders across the Old World.Molecular dating,ancestral area reconstructions,and diversity analyses were conducted using sequences from seven genes across 234 samples representing 209 species.Results indicated that these spiders originated in the eastern Neo-Tethyan region during the Early Eocene,with their subsequent diversification driven by a series of concomitant geological events.The Eurasian(ER)Group dispersed into Europe following the westward retreat of the Neo-Tethyan Ocean in the Early Miocene,while the African(AF)Group migrated into Africa via the Arabian Plate land bridge following the closure of the Neo-Tethyan Ocean in the Oligocene.The East Asian(EA)Group,which expanded along the southeastern margin of the Himalayas,experienced explosive diversification in response to sustained orogenesis at the Eocene-Oligocene boundary.These findings illustrate how large-scale geological processes and sea-land changes shaped the evolutionary history of terrestrial fauna in the Neo-Tethyan region.
基金funded by the Biological Breeding-National Science and Technology Major Projects,China(Grant No.2023ZD04066)the Zhejiang Provincial Natural Science Foundation of China(Grant Nos.LZ24C130006,LTGN24C130007)+5 种基金the Open Project Program of the State Key Laboratory of Rice Biology and Breeding,China(Grant No.20240107)the Xi’nan League Science and Technology Project,China(Grant No.2023DXZD0001)the Joint Research and Development Program on Rice Breeding in Inner Mongolia Autonomous Region,China(Grant No.YZ2023004)the China Agriculture Research System(Grant No.CARS-01)the Central Public-interest Scientific Institution Basal Research Fund,China(Grant No.CPSIBRF-CNRRI-202301)the Agricultural Science and Technology Innovation Program(ASTIP).
文摘Rice,a critical global staple crop,relies heavily on heading date,a key agronomic trait marking the transition from vegetative to reproductive growth.Understanding the genetic regulation of heading date is vital for enhancing the adaptability of high-quality rice varieties across diverse geographical regions and for bolstering local food security.In this study,we uncovered a novel role for OsCATA,a catalase gene,in the regulation of photoperiodic flowering in rice.We identified a novel allele of OsELF3.1,whose mutation resulted in delayed heading.Further analyses revealed that OsELF3.1 physically interacted with OsCATA.Notably,OsCATA exhibited rhythmic expression patterns similar to OsELF3.1 and,when mutated,also delayed flowering.Expression analyses showed that the delayed heading phenotype could be attributed to elevated Ghd7 expression under both long-day and short-day conditions,with OsCATA expression positively regulated by OsELF3.1.Double mutants of OsELF3.1 and OsCATA displayed a heading delay similar to that of oself3.1 single mutants.Additionally,OsELF3.1 could interact with Ghd7 in vivo,alleviating its suppression of Ehd1.Luciferase assays confirmed that Ghd7 repressed Ehd1 expression,while OsELF3.1 mitigated this repression.Collectively,our findings reveal that OsCATA is critical in suppressing Ghd7 expression through the OsELF3.1-OsCATA-Ghd7 transcriptional pathway,thereby regulating rice heading.
基金supported by the Second Qinghai-Xizang Plateau Scientific Expedition and Research Program(2024QZKK0200,2019QZKK05010100)Survey of Wildlife Resources in Key Areas of Xizang(ZL202203601,ZL202303601)。
文摘Birch mice(family Sicistidae)are small dipodoid rodents distributed in regions surrounding the Qinghai-Xizang Plateau and extending across the Palearctic.In China,members of the genus Sicista are rarely recorded,and their systematics remain poorly resolved.As part of the Second Xizang Plateau Expedition by the Kunming Institute of Zoology,Chinese Academy of Sciences,systematic surveys conducted in southern Xizang and the western Tianshan Mountains yielded two previously unrecognized species.Two specimens from southern Xizang were found to occupy a deeply divergent phylogenetic position within Sicistidae.Morphological assessments and molecular phylogenetic analyses of both extant and fossil Sicistidae,along with total-evidence dating and ancestral distribution reconstruction,identified these specimens as representatives of an ancient extant lineage that diverged from Sicista approximately 20.38 million years ago.This lineage is designated as a new genus,defined by the new species Breviforamen shannanensis gen.et sp.nov.Furthermore,11 specimens from the Tianshan Mountains are described as a second new species,Sicista brevicauda sp.nov.,based on diagnostic morphological and genetic features.Ancestral distribution reconstructions,combined with fossil records,indicate an early Miocene origin for Sicistidae across a broad region spanning the“Gobi”Desert to parts of North America.Climatic deterioration and increasing desertification during the mid-Miocene likely drove southward dispersal of Breviforamen gen.nov.into southern Xizang prior to the complete formation of the Yarlung Zangbo River.Overall,these findings broaden current understanding of Sicistidae diversity,elucidate the origin and dispersal patterns of the family,and highlight the presence of an ancient relict lineage in China.
基金jointly supported by the Scientific Research Foundation of Third Institute of Oceanography,Ministry of Natural Resources,Xiamen(No.2018002)the Guangxi Natural Science Fundation(No.2022GXNSFBA035588)+1 种基金the National Natural Science Foundation of China(Nos.41506050,41402193)the Scientific Research Foundation of Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration(No.19-185-17-09)。
文摘The tectonic evolution of Borneo and the affiliation between Southern and Northern Borneo remains unclear.The Rajang and Crocker Fan sediments,as one of the largest ancient submarine fans in Southeast Asia have witnessed the tectonic evolution of Borneo since at least the late Mesozoic.In this study,we present laser ablation inductively coupled plasma mass spectrometer(LA-ICP-MS)U-Pb dating and Hf isotopic results of detrital zircons from the Trusmadi and Crocker formations within the Crocker Fan of Sabah,Northern Borneo.Our results,coupled with previous data,show that the Crocker Fan sediments in Sabah of Northern Borneo display similar age spectra to the Rajang Fan sediments in Sarawak of Central Borneo,with two major age clusters at 130-80 and 280-200 Ma.Further provenance analysis based on mineral shape with a prismatic characteristic and similar detrital zircon Hf isotopes of the two formations illustrates that the Jurassic-Cretaceous and partly Triassic detrital zircons of the Crocker and Rajang Fan sediments were derived from the erosion of contemporaneous magmatic rocks;part of Permian-Triassic ones could be the recycling of the Jurassic deposits in SW Borneo.The initial provenance of these Permian-Triassic detritus could be synchronous magmatic rocks in the Tin belt of the Malay Peninsula.Combining with previous data,we propose that the entire Borneo continent,including both Southern and Northern Borneo,developed a common Mesozoic continental magmatic arc.Moreover,we postulate that the Rajang and Crocker fans formed in a fore-arc extensional rift basin related to the retreat of the subducted Paleo-Pacific Plate beneath the Northern Borneo margin.
基金supported by the National Natural Science Foundation of China(Nos.42172035 and 41572024)the Fundamental Research Funds for the Liaoning Universities(No.LJ202410166012)+1 种基金Geological Survey Project of China(No.DD20221645)Open Foundation(No.203124)of State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS)。
文摘The Ediacaran Period records a significant turning point in the evolution of life on Earth,witnessing the rise to ecological dominance of macroscopic tissue-grade organisms.The Wenghui biota from the Doushantuo Formation of South China hosts abundant multicellular algal macrofossils and problematica,some of which might be closely related to taxa from classic Late Ediacaran assemblages from South Australia and the White Sea biota of Russia.However,a lack of well-resolved isotopic age estimates has hampered efforts to constrain the timing of appearance of the Wenghui biota,obfuscating its significance to our understanding of Ediacaran macroevolution in the aftermath of the Snowball Earth events.Here,we present the first SHRIMP zircon U-Pb dating results for samples obtained from a laminated tuff ash layer at the base of the Wenghui biota in the Doushantuo Formation,Jiangkou County,Tongren City,Guizhou Province,China.Our analyses yield an age of 595.4±5.3 Ma for the first appearance of Wenghui biota,suggesting that its appearance postdated that of the Lantian and Weng'an biotas,but preceded that of the Miaohe biota.These newly obtained age proxies offer an independent test of previous isotopic estimates for the age of the Wenghui biota,providing new chronostratigraphic evidence to map the succession of Ediacaran fossil assemblages on the Yangtze Platform during the Doushantuo interval.These data suggest that the Lantian,Weng'an,Wenghui,and Miaohe biotas may record a sequence of biotic assemblages attesting to successive phases in the radiation of Ediacaran macroscopic organisms,particularly macroalgae.
基金supported by the National Natural Science Foundation of China(32272071,No.32261143466)the Major Program of Science and Technology Development of Wuhan,China(2022021302024850)the Key Project for Research and Development of Hubei Province,China(2023BBB027)。
文摘Protein content plays a crucial role in determining the eating and cooking quality of rice.However,the genetic and molecular basis underlying grain protein content remains to be elucidated.In this study,we identified a genomic region associated with grain protein content in rice chromosome segment substitution lines containing the flowering gene Ghd7.1,which reduced grain protein content by repressing the transcription of the gene OsAAP6.Knockout of Ghd7.1 increased grain protein content and decreased the eating and cooking quality of rice.Introduction of the functional haplotype of Ghd7.1 into two elite rice cultivars reduced their protein content and increased their eating quality and grain yield with no effect on the regulation of flowering time.Ghd7.1 might be used for regulating the protein content and improving the eating quality of rice varieties.
