In May and October 2017,12 stations were set up in the Central Bohai Sea for fishery resources investigation.The results show that there are many dominant species in this area,and the inshore fishery resources are hig...In May and October 2017,12 stations were set up in the Central Bohai Sea for fishery resources investigation.The results show that there are many dominant species in this area,and the inshore fishery resources are higher than those in the open sea because of the abundant nutrients from land,the high density of zooplankton and the food of swimming animals.In order to effectively protect the fishery resources in the Central Bohai Sea,this paper puts forward some suggestions,such as strengthening the protection propaganda,scientific and reasonable fishing,and strengthening the management of marine environment.展开更多
Alcohol consumption contributes to global mortality and cancer development.Acetaldehyde(ACE),the oxidized metabolite of alcohol,is highly reactive towards DNA,resulting in DNA adducts.ACE can be detoxified to acetate ...Alcohol consumption contributes to global mortality and cancer development.Acetaldehyde(ACE),the oxidized metabolite of alcohol,is highly reactive towards DNA,resulting in DNA adducts.ACE can be detoxified to acetate by acetaldehyde dehydrogenase type 2(ALDH2).ALDH2 deficiency can lead to ACE accumulation and DNA damage.展开更多
Superabsorbent Polymer(SAP)has emerged as a topic of considerable interest in recent years.The present study systematically and quantitively investigated the effect of SAP on hydration,autogenous shrinkage,mechanical ...Superabsorbent Polymer(SAP)has emerged as a topic of considerable interest in recent years.The present study systematically and quantitively investigated the effect of SAP on hydration,autogenous shrinkage,mechanical properties,and microstructure of cement mortars.Influences of SAP on hydration heat and autogenous shrinkage were studied by utilizing TAM AIR technology and a non-contact autogenous shrinkage test method.Scanning Electron Microscope(SEM)was employed to assess the microstructure evolution.Although SAP decreased the peak rate of hydration heat and retarded the hydration,it significantly increased the cumulative heat,indicating SAP helps promote the hydration.Hydration promotion caused by SAP mainly occurred in the deceleration period and attenuation period.SAP can significantly mitigate the autogenous shrinkage when the content ranged from 0 to 0.5%.Microstructure characteristics showed that pores and gaps were introduced when SAP was added.The microstructure difference caused by SAP contributed to the inferior mechanical behaviors of cement mortars treated by SAP.展开更多
Many differentiated plant organs have the ability to regenerate into a new plant after detachment via de novo organogenesis. During de novo root organogenesis from Arabidopsis thaliana leaf explants, wounding first in...Many differentiated plant organs have the ability to regenerate into a new plant after detachment via de novo organogenesis. During de novo root organogenesis from Arabidopsis thaliana leaf explants, wounding first induces endogenous auxin production in mesophyll cells. Auxin is then polar transported to, and accumulates in, regenerationcompetent cells near the wound to trigger the cell-fate transition. The TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS(TAA) family proteins and the YUCCA(YUC) family proteins catalyze two successive biochemical steps in auxin biogenesis, and YUCs have been shown to be involved in auxin production in mesophyll cells during de novo root organogenesis. In thisstudy, we show that the TAA family is also required for adventitious rooting. Inhibition of TAA blocked adventitious root formation from leaf explants. Intriguingly,whereas YUC1 and YUC4 have been shown to be highly induced by wounding, TAA genes retained consistent expression levels before and after leaf detachment.Therefore, we suggest that TAAs and YUCs are both required for auxin biogenesis in leaf explants, but they play different roles in regeneration. While YUC1 and YUC4 function in response to wounding to catalyze the ratelimiting step in auxin biosynthesis, TAAs probably serve as abiding and basal enzymes during de novo root organogenesis from leaf explants.展开更多
An unexpected observation among the COVID-19 pandemic is that smokers constituted only 1.4%–18.5%of hospitalized adults,calling for an urgent investigation to determine the role of smoking in SARS-CoV-2 infection.Her...An unexpected observation among the COVID-19 pandemic is that smokers constituted only 1.4%–18.5%of hospitalized adults,calling for an urgent investigation to determine the role of smoking in SARS-CoV-2 infection.Here,we show that cigarette smoke extract(CSE)and carcinogen benzo(a)pyrene(BaP)increase ACE2 mRNA but trigger ACE2 protein catabolism.BaP induces an aryl hydrocarbon receptor(AhR)-dependent upregulation of the ubiquitin E3 ligase Skp2 for ACE2 ubiquitination.ACE2 in lung tissues of non-smokers is higher than in smokers,consistent with the findings that tobacco carcinogens downregulate ACE2 in mice.Tobacco carcinogens inhibit SARS-CoV-2 spike protein pseudovirions infection of the cells.Given that tobacco smoke accounts for 8 million deaths including 2.1 million cancer deaths annually and Skp2 is an oncoprotein,tobacco use should not be recommended and cessation plan should be prepared for smokers in COVID-19 pandemic.展开更多
The characteristic genetic abnormality of neuroendocrine neoplasms(NENs),a heterogeneous group of tumors found in various organs,remains to be identified.Here,based on the analysis of the splicing variants of an oncog...The characteristic genetic abnormality of neuroendocrine neoplasms(NENs),a heterogeneous group of tumors found in various organs,remains to be identified.Here,based on the analysis of the splicing variants of an oncogene Focal Adhesion Kinase(FAK)in The Cancer Genome Atlas datasets that contain 9193 patients of 33 cancer subtypes,we found that Box 6/Box 7-containing FAK variants(FAK^(6/7))were observed in 7(87.5%)of 8 pancreatic neuroendocrine carcinomas and 20(11.76%)of 170 pancreatic ductal adenocarcinomas(PDACs).We tested FAK variants in 157 tumor samples collected from Chinese patients with pancreatic tumors,and found that FAK^(6/7)was positive in 34(75.6%)of 45 pancreatic NENs,19(47.5%)of 40 pancreatic solid pseudopapillary neoplasms,and 2(2.9%)of 69 PDACs.We further tested FAK splicing variants in breast neuroendocrine carcinoma(BrNECs),and found that FAK^(6/7)was positive in 14(93.3%)of 15 BrNECs but 0 in 23 non-NEC breast cancers.We explored the underlying mechanisms and found that a splicing factor serine/arginine repetitive matrix protein 4(SRRM4)was overexpressed in FAK^(6/7)-positive pancreatic tumors and breast tumors,which promoted the formation of FAK^(6/7)in cells.These results suggested that FAK^(6/7)could be a biomarker of NENs and represent a potential therapeutic target for these orphan diseases.展开更多
Interdisciplinary research(IDR)plays a vital role in tackling grand and complex challenges such as COVID-19,which has severe consequences for public health,economy,politics,and society.This study compares several face...Interdisciplinary research(IDR)plays a vital role in tackling grand and complex challenges such as COVID-19,which has severe consequences for public health,economy,politics,and society.This study compares several facets of interdisciplinarity that occurred in the research relating to two serious global pandemics in this century,namely SARS and COVID-19,and provides a comprehensive summary of the performance and growth of pandemic-related interdisciplinary research.Generally,the scientific community gathers more multidisciplinary efforts to tackle COVID-19 in comparison to SARS.Firstly,COVID-19 related research from each major field has greater connections with their established expertise and research threads such that they are studying the impact of COVID-19 on their own existing research subjects,while the studies of SARS by different disciplines exhibit less discernable disciplinary characteristics.Secondly,as for the interdisciplinarity observed in the knowledge base of pandemic-related publications,we observe a greater presence of social science knowledge and a more dispersed distribution of knowledge from various disciplines comparing publications on COVID-19 with SARS.Thirdly,regarding interdisciplinarity in research collaboration,COVID-19 publications are on average produced by more interdisciplinary teams than SARS,as measured by the number and diversity of affiliated disciplines of authors.Our discovery on the growth of multidisciplinarity and interdisciplinarity in pandemic-related research signals positive achievement that the scientific community is responding to such a global challenge as a whole and is willing to break down existing disciplinary silos to facilitate the flow of knowledge and breed novelty.展开更多
文摘In May and October 2017,12 stations were set up in the Central Bohai Sea for fishery resources investigation.The results show that there are many dominant species in this area,and the inshore fishery resources are higher than those in the open sea because of the abundant nutrients from land,the high density of zooplankton and the food of swimming animals.In order to effectively protect the fishery resources in the Central Bohai Sea,this paper puts forward some suggestions,such as strengthening the protection propaganda,scientific and reasonable fishing,and strengthening the management of marine environment.
基金supported by grants from the National Nature Science Foundation of China(No.82172565,81620108022,81872245,91129303,991729302,81572759,,31900441,82003069,82103571,882002941,82072570,91129733,81502702).
文摘Alcohol consumption contributes to global mortality and cancer development.Acetaldehyde(ACE),the oxidized metabolite of alcohol,is highly reactive towards DNA,resulting in DNA adducts.ACE can be detoxified to acetate by acetaldehyde dehydrogenase type 2(ALDH2).ALDH2 deficiency can lead to ACE accumulation and DNA damage.
基金The authors would like to thank the financial sponsorship provided by the National Natural Science Foundation of China(Grant No.51778638).The contents of this paper reflect the views of the authors,who are responsible for the facts and the accuracy of the data presented herein,and do not necessarily reflect any official views or policies.The first author would also like to thank the China Scholarship Council(CSC)for their support.
文摘Superabsorbent Polymer(SAP)has emerged as a topic of considerable interest in recent years.The present study systematically and quantitively investigated the effect of SAP on hydration,autogenous shrinkage,mechanical properties,and microstructure of cement mortars.Influences of SAP on hydration heat and autogenous shrinkage were studied by utilizing TAM AIR technology and a non-contact autogenous shrinkage test method.Scanning Electron Microscope(SEM)was employed to assess the microstructure evolution.Although SAP decreased the peak rate of hydration heat and retarded the hydration,it significantly increased the cumulative heat,indicating SAP helps promote the hydration.Hydration promotion caused by SAP mainly occurred in the deceleration period and attenuation period.SAP can significantly mitigate the autogenous shrinkage when the content ranged from 0 to 0.5%.Microstructure characteristics showed that pores and gaps were introduced when SAP was added.The microstructure difference caused by SAP contributed to the inferior mechanical behaviors of cement mortars treated by SAP.
基金supported by the National Basic Research Program of China (973 Program,2014CB943500/2012CB910503)the National Natural Science Foundation of China (91419302/31422005)Youth Innovation Promotion Association CAS
文摘Many differentiated plant organs have the ability to regenerate into a new plant after detachment via de novo organogenesis. During de novo root organogenesis from Arabidopsis thaliana leaf explants, wounding first induces endogenous auxin production in mesophyll cells. Auxin is then polar transported to, and accumulates in, regenerationcompetent cells near the wound to trigger the cell-fate transition. The TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS(TAA) family proteins and the YUCCA(YUC) family proteins catalyze two successive biochemical steps in auxin biogenesis, and YUCs have been shown to be involved in auxin production in mesophyll cells during de novo root organogenesis. In thisstudy, we show that the TAA family is also required for adventitious rooting. Inhibition of TAA blocked adventitious root formation from leaf explants. Intriguingly,whereas YUC1 and YUC4 have been shown to be highly induced by wounding, TAA genes retained consistent expression levels before and after leaf detachment.Therefore, we suggest that TAAs and YUCs are both required for auxin biogenesis in leaf explants, but they play different roles in regeneration. While YUC1 and YUC4 function in response to wounding to catalyze the ratelimiting step in auxin biosynthesis, TAAs probably serve as abiding and basal enzymes during de novo root organogenesis from leaf explants.
基金the National Key Research and Development Program of China(Nos.2020YFA0803300 and 2018YFC1313600)the National Natural Science Funds for Distinguished Young Scholar(No.81425025)+2 种基金the Key Project of the National Natural Science Foundation of China(No.81830093)the CAMS Innovation Fund for Medical Sciences(CIFMS,No.2019-I2M-1-003)the National Natural Science Foundation of China(Nos.81672765 and 81802796).
文摘An unexpected observation among the COVID-19 pandemic is that smokers constituted only 1.4%–18.5%of hospitalized adults,calling for an urgent investigation to determine the role of smoking in SARS-CoV-2 infection.Here,we show that cigarette smoke extract(CSE)and carcinogen benzo(a)pyrene(BaP)increase ACE2 mRNA but trigger ACE2 protein catabolism.BaP induces an aryl hydrocarbon receptor(AhR)-dependent upregulation of the ubiquitin E3 ligase Skp2 for ACE2 ubiquitination.ACE2 in lung tissues of non-smokers is higher than in smokers,consistent with the findings that tobacco carcinogens downregulate ACE2 in mice.Tobacco carcinogens inhibit SARS-CoV-2 spike protein pseudovirions infection of the cells.Given that tobacco smoke accounts for 8 million deaths including 2.1 million cancer deaths annually and Skp2 is an oncoprotein,tobacco use should not be recommended and cessation plan should be prepared for smokers in COVID-19 pandemic.
基金supported by the Key Project of the National Natural Science Foundation of China (No.81830093)the National Key Research and Development Program of China (Nos.2020YFC2002705,2020YFA0803300,and 2022YFA1103900)+2 种基金the CAMS Innovation Fund for Medical Sciences (CIFMS,Nos.2022-RC310-05 and 2021-RC310-003)the CAMS Initiative for Innovative Medicine (Nos.2021-12M-1-014,2022-I2M-2-001,and 2021-12M-1-021)the National Natural Science Foundation of China (Nos.82073092 and 82273076).
文摘The characteristic genetic abnormality of neuroendocrine neoplasms(NENs),a heterogeneous group of tumors found in various organs,remains to be identified.Here,based on the analysis of the splicing variants of an oncogene Focal Adhesion Kinase(FAK)in The Cancer Genome Atlas datasets that contain 9193 patients of 33 cancer subtypes,we found that Box 6/Box 7-containing FAK variants(FAK^(6/7))were observed in 7(87.5%)of 8 pancreatic neuroendocrine carcinomas and 20(11.76%)of 170 pancreatic ductal adenocarcinomas(PDACs).We tested FAK variants in 157 tumor samples collected from Chinese patients with pancreatic tumors,and found that FAK^(6/7)was positive in 34(75.6%)of 45 pancreatic NENs,19(47.5%)of 40 pancreatic solid pseudopapillary neoplasms,and 2(2.9%)of 69 PDACs.We further tested FAK splicing variants in breast neuroendocrine carcinoma(BrNECs),and found that FAK^(6/7)was positive in 14(93.3%)of 15 BrNECs but 0 in 23 non-NEC breast cancers.We explored the underlying mechanisms and found that a splicing factor serine/arginine repetitive matrix protein 4(SRRM4)was overexpressed in FAK^(6/7)-positive pancreatic tumors and breast tumors,which promoted the formation of FAK^(6/7)in cells.These results suggested that FAK^(6/7)could be a biomarker of NENs and represent a potential therapeutic target for these orphan diseases.
基金funded by the China Scholarship Council(CSC)from the Ministry of Education of Chinafunding from the Flemish Government through its support to the Centre for R&D Monitoring(ECOOM)support from the National Laboratory Centre for Library and Information Science at Wuhan University
文摘Interdisciplinary research(IDR)plays a vital role in tackling grand and complex challenges such as COVID-19,which has severe consequences for public health,economy,politics,and society.This study compares several facets of interdisciplinarity that occurred in the research relating to two serious global pandemics in this century,namely SARS and COVID-19,and provides a comprehensive summary of the performance and growth of pandemic-related interdisciplinary research.Generally,the scientific community gathers more multidisciplinary efforts to tackle COVID-19 in comparison to SARS.Firstly,COVID-19 related research from each major field has greater connections with their established expertise and research threads such that they are studying the impact of COVID-19 on their own existing research subjects,while the studies of SARS by different disciplines exhibit less discernable disciplinary characteristics.Secondly,as for the interdisciplinarity observed in the knowledge base of pandemic-related publications,we observe a greater presence of social science knowledge and a more dispersed distribution of knowledge from various disciplines comparing publications on COVID-19 with SARS.Thirdly,regarding interdisciplinarity in research collaboration,COVID-19 publications are on average produced by more interdisciplinary teams than SARS,as measured by the number and diversity of affiliated disciplines of authors.Our discovery on the growth of multidisciplinarity and interdisciplinarity in pandemic-related research signals positive achievement that the scientific community is responding to such a global challenge as a whole and is willing to break down existing disciplinary silos to facilitate the flow of knowledge and breed novelty.
