The impedance matching of absorbers is a vital factor affecting their microwave absorption(MA)properties.In this work,we controllably synthesized Material of Institute Lavoisier 88C(MIL-88C)with varying aspect ratios(...The impedance matching of absorbers is a vital factor affecting their microwave absorption(MA)properties.In this work,we controllably synthesized Material of Institute Lavoisier 88C(MIL-88C)with varying aspect ratios(AR)as a precursor by regulating oil bath conditions,followed by one-step thermal decomposition to obtain carbon-coated iron-based composites.Modifying the precursor MIL-88C(Fe)preparation conditions,such as the molar ratio between metal ions and organic ligands(M/O),oil bath temperature,and oil bath time,influenced the phases,graphitization degree,and AR of the derivatives,enabling low filler loading,achieving well-matched impedance,and ensuring outstanding MA properties.The MOF-derivatives 2(MD_(2))/polyvinylidene Difluoride(PVDF),MD_(3)/PVDF,and MD4/PVDF absorbers all exhibited excellent MA properties with optimal filler loadings below 20 wt%and as low as 5 wt%.The MD_(2)/PVDF(5 wt%)achieved a maximum effective absorption bandwidth(EAB)of 5.52 GHz(1.90 mm).The MD_(3)/PVDF(10 wt%)possessed a minimum reflection loss(RL_(min))value of−67.4 at 12.56 GHz(2.13 mm).A symmetric gradient honeycomb structure(SGHS)was constructed utilizing the high-frequency structure simulator(HFSS)to further extend the EAB,achieving an EAB of 14.6 GHz and a RL_(min) of−59.0 dB.This research offers a viable inspiration to creating structures or materials with high-efficiency MA properties.展开更多
Lymph node metastasis(LNM)is a crucial risk factor influencing an unfavorable prognosis in specific cancers.Fundamental research illuminates our understanding of tumor behavior and identifies valuable therapeutic targ...Lymph node metastasis(LNM)is a crucial risk factor influencing an unfavorable prognosis in specific cancers.Fundamental research illuminates our understanding of tumor behavior and identifies valuable therapeutic targets.Nevertheless,the exploration of fundamental theories and the validation of clinical therapies hinge on preclinical experiments.Preclinical models,in this context,serve as the conduit connecting fundamental theories to clinical outcomes.In vivo models established in animals offer a valuable platform for comprehensively observing interactions between tumor cells and organisms.Using various experimental animals,including mice,diverse methods,such as carcinogen-induced tumorigenesis,tumor cell line or human tumor transplantation,genetic engineering,and humanization,have been used effectively to construct numerous models for tumor LNM.Carcinogen-induced models simulate the entire process of tumorigenesis and metastasis.Transplantation models,using human tumor cell lines or patient-derived tumors,offer a research platform closely mirroring the histology and clinical behavior of human tumors.Genetically engineered models have been used to delve into the mechanisms of primary tumorigenesis within an intact microenvironment.Humanized models are used to overcome barriers between human and murine immune systems.Beyond mouse models,various other animal models have unique advantages and limitations,all contributing to exploring LNM.This review summarizes existing in vitro and animal preclinical models,identifies current bottlenecks in preclinical research,and offers an outlook on forthcoming preclinical models.展开更多
Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(Li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO)...Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(Li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO), the bidirectional electron redistribution enables a higher polysulfide affinity over its monodoped counterparts, contributing to strong sulfur immobilization and fast conversion kinetics. As a result,BNrGO as the cathode host matrix realizes excellent cycling stability over 1000 cycles with a minimum capacity fading of 0.027% per cycle, and superb rate capability up to 10 C. Meanwhile, decent areal capacity(6.46 m Ah/cm^(2)) and cyclability(300 cycles) are also achievable under high sulfur loading and limited electrolyte. This work provides instructive insights into the interaction between doping engineering and sulfur electrochemistry for pursuing superior Li-S batteries.展开更多
Disease forecasting and surveillance often involve fitting models to a tremendous volume of historical testing data collected over space and time.Bayesian spatio-temporal regression models fit with Markov chain Monte ...Disease forecasting and surveillance often involve fitting models to a tremendous volume of historical testing data collected over space and time.Bayesian spatio-temporal regression models fit with Markov chain Monte Carlo(MCMC)methods are commonly used for such data.When the spatio-temporal support of the model is large,implementing an MCMC algorithm becomes a significant computational burden.This research proposes a computationally efficient gradient boosting algorithm for fitting a Bayesian spatiotemporal mixed effects binomial regression model.We demonstrate our method on a disease forecasting model and compare it to a computationally optimized MCMC approach.Both methods are used to produce monthly forecasts for Lyme disease,anaplasmosis,ehrlichiosis,and heartworm disease in domestic dogs for the contiguous United States.The data have a spatial support of 3108 counties and a temporal support of 108e138 months with 71e135 million test results.The proposed estimation approach is several orders of magnitude faster than the optimized MCMC algorithm,with a similar mean absolute prediction error.展开更多
From the perspectives of biodiversity conservation and management, there is an urgent need to have at hand current synopses of classification and distributions of species. In this paper, we review and summa rize the c...From the perspectives of biodiversity conservation and management, there is an urgent need to have at hand current synopses of classification and distributions of species. In this paper, we review and summa rize the classifica tions, Chinese a nd English names, type specimens, type localities and distributions of China’s lizard fauna to promote scientific exchange and species conservation among relevant people in China and internationally. As of December 31, 2020, a total of 230species of lizard, belonging to 44 genera and 12 families,have been recorded from China, including 4 invasive species: 2 in the family Gekkonidae, 1 in Iguanidae and one in Dactyloidae. There are 115 endemic species, accounting for 50% of this group. The proportion of endemic species to China was the highest in the family Eublepharidae(84.62%), and the number of endemic species to China was the highest in the family Agamidae(42 species). The species distributions and classifica tion in the “Fa una Sinica(Reptilia 2): Squamata(Lacertilia)” were updated.Among the provincial administrative units, there is a larger number of species in the southern provinces, such as Yunnan, Guangdong, Guangxi and Taiwan. Sichuan, Yunnan, and Taiwan harbour relatively more endemic species than others. A total of 154 species of lizards were first discovered in China, and the type localities of these species are concentrated in Yunnan, Taiwan, Tibet, Xinjiang, and Sichuan.展开更多
In recent years,taxonomic research of the genus Diploderma has made great progress,but there are still areas lacking relevant investigations.During 2020-2021,we carried out survey of reptile diversity in and around th...In recent years,taxonomic research of the genus Diploderma has made great progress,but there are still areas lacking relevant investigations.During 2020-2021,we carried out survey of reptile diversity in and around the Shaluli Mountains and collected some specimens of Diploderma.Of which,based on systematics inferred from mitochondrial ND2 gene sequence and morphological data,three new species were recognized:Diploderma daochengense sp.nov.from the Shuiluo River and Muli River valleys in southeastern Daocheng County,D.xinlongense sp.nov.from the upper-middle valleys of the Yalong River in Xinlong County,and D.kangdingense sp.nov.from the Yalong River middle valley and Liqiu River valley.Specifically,these three new species formed three monophyletic lineages with strongly supported and nested into the subclade I of the Bayesian and Maximum Likelihood trees.The uncorrected mean genetic distance between these new species and their closely related species was 4.3%(D.xinlongense sp.nov.vs.D.panchi),3.4%(D.daochengense sp.nov.vs.D.yulongense)and 5.5%(D.kangdingense sp.nov.vs.D.bowoense),higher than many pairs of species of Diploderma.With respect to the morphology,D.daochengense sp.nov.can be easily diagnosed from D.yulongense byhaving smoothupper edge of the dorsolateral stripes,cyan or dark olive green to yellow gular spots inbothsexes and light yelloworwhite ventrolateral body in males;D.xinlongense sp.nov.can be easily diagnosed from D.panchi by having cyan gular spot in both sexes;D.kangdingense sp.nov.can be easily diagnosed from D.bowoense by having more T4S 20-25(average 23),more F4S 16-20(average 17)and yellow to light yellow ventrolateral body,yellow gular spot present in males.To date,the number of species of the genus Diploderma has increased to 40,of which 37 species have been known in China.展开更多
Objective Anastomotic leakage(AL)is one of the serious complications after anterior resection for rectal cancer.Defunctioning stoma(DS)is one of the most widely used approaches to prevent it;however,the effect of DS o...Objective Anastomotic leakage(AL)is one of the serious complications after anterior resection for rectal cancer.Defunctioning stoma(DS)is one of the most widely used approaches to prevent it;however,the effect of DS on the occurrence of AL remains controversial.This study aimed to investigate risk factors of AL and assess the effect of DS after anterior resection for rectal cancer patients.Methods A retrospective analysis was conducted for the data of 1840 patients who underwent anterior resection for rectal cancer from January 2014 to December 2019.Results The results showed the overall AL incidence was 7.5%.Multivariate analyses revealed that males[odds ratio(OR)1.562]and T3–T4 stage(OR 1.729)were independent risk factors for all patients.After propensity score matching analysis,the AL incidence was 14.1%in the group with no DS and 6.4%in the DS group(P<0.001).The clinical AL(grade B+grade C)incidence was 12.4%in no DS group and 4.6%in the DS group(P<0.001).Conclusion The study suggested that males and T3–T4 stage were independent risk factors of AL.In addition,DS could reduce the rate of symptomatic AL.展开更多
A new species of gekkonid,Hemiphyllodactylus dupanglingensis sp.nov.,is described based on six specimens from Hunan Province,China.The new species is phylogenetically close to H.zugi,H.hongkongensis,H.dushanensis,and ...A new species of gekkonid,Hemiphyllodactylus dupanglingensis sp.nov.,is described based on six specimens from Hunan Province,China.The new species is phylogenetically close to H.zugi,H.hongkongensis,H.dushanensis,and H.huishuiensis,and can be distinguished from its congeners by the following combination of cha racters:9-11 chin scales;postmental scales enlarged;9-12 infralabials,11-14 supralabials;14-16 dorsal scales and 10-11 ventral scales longitudinally arranged at the midbody contained with one eye diameter;a manual lamellar formula of 4-4-5-4 or 4-5-5-4 and a pedal lamellar formula of 4-5-5-5 or 5-6-6-4;21-25 continuous precloacal and femoral pores in males.展开更多
Geocoris xishaensis sp.nov.from Hainan Province,China is described.It is characterized by head ochraceous;antennal segments dark;pronotum pale with a large dark spot in median area;hemelytra pale;scutellum black.
0 INTRODUCTION Continental shale oil is a strategic alternative resource to ensure the safety of national oil supply and improve the level of industrial innovation.China is a large country of continental oil resources...0 INTRODUCTION Continental shale oil is a strategic alternative resource to ensure the safety of national oil supply and improve the level of industrial innovation.China is a large country of continental oil resources,accounting for 90%of the total onshore oil resources;and China is also a major producer of continental oil,accounting for about 93%of the total oil production(Yang et al.,2019;Jia et al.,2018).展开更多
基金financially supported by the National Natural Science Foundation of China(51972049,52073010,and 52373259)the Projects of the Science and Technology Department of Jilin Province(20230201132GX)the Projects of the Education Department of Jilin Province(JJKH20220123KJ)。
文摘The impedance matching of absorbers is a vital factor affecting their microwave absorption(MA)properties.In this work,we controllably synthesized Material of Institute Lavoisier 88C(MIL-88C)with varying aspect ratios(AR)as a precursor by regulating oil bath conditions,followed by one-step thermal decomposition to obtain carbon-coated iron-based composites.Modifying the precursor MIL-88C(Fe)preparation conditions,such as the molar ratio between metal ions and organic ligands(M/O),oil bath temperature,and oil bath time,influenced the phases,graphitization degree,and AR of the derivatives,enabling low filler loading,achieving well-matched impedance,and ensuring outstanding MA properties.The MOF-derivatives 2(MD_(2))/polyvinylidene Difluoride(PVDF),MD_(3)/PVDF,and MD4/PVDF absorbers all exhibited excellent MA properties with optimal filler loadings below 20 wt%and as low as 5 wt%.The MD_(2)/PVDF(5 wt%)achieved a maximum effective absorption bandwidth(EAB)of 5.52 GHz(1.90 mm).The MD_(3)/PVDF(10 wt%)possessed a minimum reflection loss(RL_(min))value of−67.4 at 12.56 GHz(2.13 mm).A symmetric gradient honeycomb structure(SGHS)was constructed utilizing the high-frequency structure simulator(HFSS)to further extend the EAB,achieving an EAB of 14.6 GHz and a RL_(min) of−59.0 dB.This research offers a viable inspiration to creating structures or materials with high-efficiency MA properties.
基金supported by the Fundamental Research Funds for the Central Universities(Wuhan University,Clinical Medicine+X,No.2042024YXB017)the Hubei Province Chinese Medicine Research Project(No.ZY2023Q015)+2 种基金the National Natural Science Foundation of China(No.61904057)the Natural Science Foundation of Hubei Province(No.2023AFB665)the Medical Young Talents Program of Hubei Province,Wuhan Young Medical Talents Training Project,China.
文摘Lymph node metastasis(LNM)is a crucial risk factor influencing an unfavorable prognosis in specific cancers.Fundamental research illuminates our understanding of tumor behavior and identifies valuable therapeutic targets.Nevertheless,the exploration of fundamental theories and the validation of clinical therapies hinge on preclinical experiments.Preclinical models,in this context,serve as the conduit connecting fundamental theories to clinical outcomes.In vivo models established in animals offer a valuable platform for comprehensively observing interactions between tumor cells and organisms.Using various experimental animals,including mice,diverse methods,such as carcinogen-induced tumorigenesis,tumor cell line or human tumor transplantation,genetic engineering,and humanization,have been used effectively to construct numerous models for tumor LNM.Carcinogen-induced models simulate the entire process of tumorigenesis and metastasis.Transplantation models,using human tumor cell lines or patient-derived tumors,offer a research platform closely mirroring the histology and clinical behavior of human tumors.Genetically engineered models have been used to delve into the mechanisms of primary tumorigenesis within an intact microenvironment.Humanized models are used to overcome barriers between human and murine immune systems.Beyond mouse models,various other animal models have unique advantages and limitations,all contributing to exploring LNM.This review summarizes existing in vitro and animal preclinical models,identifies current bottlenecks in preclinical research,and offers an outlook on forthcoming preclinical models.
基金financially supported by the National Natural Science Foundation of China (No. 22109072)the Natural Science Foundation of Jiangsu Province (No. BK20210349)+2 种基金the China Postdoctoral Science Foundation (No. 2021M691586)the Postdoctoral Research Funding Scheme of Jiangsu Province (No. 2021K446C)the Shuangchuang (Mass Innovation and Entrepreneurship) Program of Jiangsu Province (No. JSSCBS20210208)。
文摘Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(Li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO), the bidirectional electron redistribution enables a higher polysulfide affinity over its monodoped counterparts, contributing to strong sulfur immobilization and fast conversion kinetics. As a result,BNrGO as the cathode host matrix realizes excellent cycling stability over 1000 cycles with a minimum capacity fading of 0.027% per cycle, and superb rate capability up to 10 C. Meanwhile, decent areal capacity(6.46 m Ah/cm^(2)) and cyclability(300 cycles) are also achievable under high sulfur loading and limited electrolyte. This work provides instructive insights into the interaction between doping engineering and sulfur electrochemistry for pursuing superior Li-S batteries.
基金RH and SS were supported in part or in full by the Companion Animal Parasite Council.SSAM were supported in part by the Research Center for Child Well-Being[NIGMS P20GM130420].
文摘Disease forecasting and surveillance often involve fitting models to a tremendous volume of historical testing data collected over space and time.Bayesian spatio-temporal regression models fit with Markov chain Monte Carlo(MCMC)methods are commonly used for such data.When the spatio-temporal support of the model is large,implementing an MCMC algorithm becomes a significant computational burden.This research proposes a computationally efficient gradient boosting algorithm for fitting a Bayesian spatiotemporal mixed effects binomial regression model.We demonstrate our method on a disease forecasting model and compare it to a computationally optimized MCMC approach.Both methods are used to produce monthly forecasts for Lyme disease,anaplasmosis,ehrlichiosis,and heartworm disease in domestic dogs for the contiguous United States.The data have a spatial support of 3108 counties and a temporal support of 108e138 months with 71e135 million test results.The proposed estimation approach is several orders of magnitude faster than the optimized MCMC algorithm,with a similar mean absolute prediction error.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No. XDA19050201the National Natural Science Founda tion of China (32070433)+1 种基金the Special Fund for Youth Scholars on Taxonomy, the Chinese Academy of Sciences (ZSBR-014)China Biodiversity Observation Networks (Sino BON–Amphibian & Reptile)。
文摘From the perspectives of biodiversity conservation and management, there is an urgent need to have at hand current synopses of classification and distributions of species. In this paper, we review and summa rize the classifica tions, Chinese a nd English names, type specimens, type localities and distributions of China’s lizard fauna to promote scientific exchange and species conservation among relevant people in China and internationally. As of December 31, 2020, a total of 230species of lizard, belonging to 44 genera and 12 families,have been recorded from China, including 4 invasive species: 2 in the family Gekkonidae, 1 in Iguanidae and one in Dactyloidae. There are 115 endemic species, accounting for 50% of this group. The proportion of endemic species to China was the highest in the family Eublepharidae(84.62%), and the number of endemic species to China was the highest in the family Agamidae(42 species). The species distributions and classifica tion in the “Fa una Sinica(Reptilia 2): Squamata(Lacertilia)” were updated.Among the provincial administrative units, there is a larger number of species in the southern provinces, such as Yunnan, Guangdong, Guangxi and Taiwan. Sichuan, Yunnan, and Taiwan harbour relatively more endemic species than others. A total of 154 species of lizards were first discovered in China, and the type localities of these species are concentrated in Yunnan, Taiwan, Tibet, Xinjiang, and Sichuan.
基金supported by the Second Tibetan Plateau Scientific Expedition and Research Program (STEP 2019QZKK05010503 and 2019QZKK04020202)the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment (2019H J2096001006)+1 种基金China Biodiversity Observation Networks (Sino BON)Survey of wild vertebrates in Ganzi Prefecture (20yyjs00030)
文摘In recent years,taxonomic research of the genus Diploderma has made great progress,but there are still areas lacking relevant investigations.During 2020-2021,we carried out survey of reptile diversity in and around the Shaluli Mountains and collected some specimens of Diploderma.Of which,based on systematics inferred from mitochondrial ND2 gene sequence and morphological data,three new species were recognized:Diploderma daochengense sp.nov.from the Shuiluo River and Muli River valleys in southeastern Daocheng County,D.xinlongense sp.nov.from the upper-middle valleys of the Yalong River in Xinlong County,and D.kangdingense sp.nov.from the Yalong River middle valley and Liqiu River valley.Specifically,these three new species formed three monophyletic lineages with strongly supported and nested into the subclade I of the Bayesian and Maximum Likelihood trees.The uncorrected mean genetic distance between these new species and their closely related species was 4.3%(D.xinlongense sp.nov.vs.D.panchi),3.4%(D.daochengense sp.nov.vs.D.yulongense)and 5.5%(D.kangdingense sp.nov.vs.D.bowoense),higher than many pairs of species of Diploderma.With respect to the morphology,D.daochengense sp.nov.can be easily diagnosed from D.yulongense byhaving smoothupper edge of the dorsolateral stripes,cyan or dark olive green to yellow gular spots inbothsexes and light yelloworwhite ventrolateral body in males;D.xinlongense sp.nov.can be easily diagnosed from D.panchi by having cyan gular spot in both sexes;D.kangdingense sp.nov.can be easily diagnosed from D.bowoense by having more T4S 20-25(average 23),more F4S 16-20(average 17)and yellow to light yellow ventrolateral body,yellow gular spot present in males.To date,the number of species of the genus Diploderma has increased to 40,of which 37 species have been known in China.
基金supported by grants from the National Natural Science Foundation of China(No.81974382)the Major Scientific and Technological Innovation Projects in Hubei Province(No.2018ACA136)the Innovative Team for Human Major Diseases Program,Tongji Medical College,Huazhong University of Science and Technology.
文摘Objective Anastomotic leakage(AL)is one of the serious complications after anterior resection for rectal cancer.Defunctioning stoma(DS)is one of the most widely used approaches to prevent it;however,the effect of DS on the occurrence of AL remains controversial.This study aimed to investigate risk factors of AL and assess the effect of DS after anterior resection for rectal cancer patients.Methods A retrospective analysis was conducted for the data of 1840 patients who underwent anterior resection for rectal cancer from January 2014 to December 2019.Results The results showed the overall AL incidence was 7.5%.Multivariate analyses revealed that males[odds ratio(OR)1.562]and T3–T4 stage(OR 1.729)were independent risk factors for all patients.After propensity score matching analysis,the AL incidence was 14.1%in the group with no DS and 6.4%in the DS group(P<0.001).The clinical AL(grade B+grade C)incidence was 12.4%in no DS group and 4.6%in the DS group(P<0.001).Conclusion The study suggested that males and T3–T4 stage were independent risk factors of AL.In addition,DS could reduce the rate of symptomatic AL.
基金supported by the National Natural Science Foundation of China(Grant No.31472021)the Project for Endangered Wildlife Investigation,Supervision and Industry Regulation of the National Forestry and Grassland Bureau of China(No.2019072-HN-001)。
文摘A new species of gekkonid,Hemiphyllodactylus dupanglingensis sp.nov.,is described based on six specimens from Hunan Province,China.The new species is phylogenetically close to H.zugi,H.hongkongensis,H.dushanensis,and H.huishuiensis,and can be distinguished from its congeners by the following combination of cha racters:9-11 chin scales;postmental scales enlarged;9-12 infralabials,11-14 supralabials;14-16 dorsal scales and 10-11 ventral scales longitudinally arranged at the midbody contained with one eye diameter;a manual lamellar formula of 4-4-5-4 or 4-5-5-4 and a pedal lamellar formula of 4-5-5-5 or 5-6-6-4;21-25 continuous precloacal and femoral pores in males.
基金financial support from the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(19KJB510009)the Key Research and Development Program of Hainan Province(ZDYF2020081,ZDYF2017056)+4 种基金the Scientific Research Project of Sanya Yazhou Bay Science and Technology City Management Bureau(SKJC-2020-02-015)the Program of Ministry of Science and Technology of the People’s Republic of China(2015FY210300)the National Natural Science Foundation of China(31402010)the Highly Educated Talents Foundation in Nanjing Forestry University(G2014002)the special fund of Bureau of Marine and Fishery of Sansha City。
文摘Geocoris xishaensis sp.nov.from Hainan Province,China is described.It is characterized by head ochraceous;antennal segments dark;pronotum pale with a large dark spot in median area;hemelytra pale;scutellum black.
基金PetroChina Shale Oil Major Science and Technology Project(No.2021DJ18)the National High-Level Special Talent Support Plan(the fourth batch)。
文摘0 INTRODUCTION Continental shale oil is a strategic alternative resource to ensure the safety of national oil supply and improve the level of industrial innovation.China is a large country of continental oil resources,accounting for 90%of the total onshore oil resources;and China is also a major producer of continental oil,accounting for about 93%of the total oil production(Yang et al.,2019;Jia et al.,2018).
基金funded by Tianjin Science and Technology Planning Project(20KPHDRC00070)basic scientific research fees of Chinese Academy of Agricultural Sciences(Y2022LM15)+1 种基金the Key Research and Development Program of Hainan Province(ZDYF2022XDNY214ZDYF2017056)。
文摘为全面调查中国海南省三沙市永兴岛的跳小蜂科物种多样性,于2017~2020年期间采集了永兴岛的跳小蜂。经鉴定,共发现跳小蜂10种,包含1新种:Ooencyrtus yongxingensis Zu&Xue sp.nov.及2中国新记录种:Adelencyrtus mangiphila(Risbec,1952),Metaphycus agarwali Hayat and Subba Rao,1981。文中还提供了永兴岛跳小蜂科名录。
