Background:Previous single-center studies have demonstrated that drug-coated balloons(DCBs)may reduce restenosis rates,which is an important factor affecting the prognosis for intracranial interventional therapy.Howev...Background:Previous single-center studies have demonstrated that drug-coated balloons(DCBs)may reduce restenosis rates,which is an important factor affecting the prognosis for intracranial interventional therapy.However,currently available cardiac DCBs are not always suitable for the treatment of intracranial atherosclerotic stenosis(ICAS).This study aimed to evaluate the safety and efficacy of a novel DCB catheter designed for patients with severely symptomatic ICAS.Methods:This prospective,multicenter,single-arm,target-value clinical trial was conducted in 9 Chinese stroke centers to evaluate the safety and efficacy of a novel DCB catheter for treating symptomatic severe ICAS.Primary metrics and other indicators were collected and analyzed using SAS version 9.4(SAS Institute,Cary,NC,USA).Results:A total of 155 patients were enrolled in this study.The preliminary collection of follow-up data has been completed,while data quality control is ongoing.Conclusion:Results of this study demonstrated the patency rate,safety,and effectiveness of a novel on-label paclitaxel DCB designed for the treatment of ICAS.Ethics and dissemination:This study,involving human participants,was reviewed and approved by the Ethics Committee of Drugs(Devices)Clinical Experiment at Henan Provincial People’s Hospital(reference number:2020-145-03)and other research centers participating in the clinical trial.The results of this study will be presented at international conferences and sent to peer-reviewed journals for publication.Standard protocol items:The Recommendations for Interventional Trials checklist was used when drafting the study protocol.Trial registration number:Registered with the Chinese Clinical Trial Registry on June 11,2021(Chi CTR2100047223).展开更多
Engineering design of battery configurations and new battery system development are alternative approaches to achieve high performance batteries. A novel flexible and ultra-light graphite anode is fabricated by simple...Engineering design of battery configurations and new battery system development are alternative approaches to achieve high performance batteries. A novel flexible and ultra-light graphite anode is fabricated by simple friction drawing on filter paper with a commercial 8 B pencil.Compared with the traditional anode using copper foil as current collector, this innovative current-collector-free design presents capacity improvement of over 200% by reducing the inert weight of the electrode. The as-prepared pencil-trace electrode exhibits excellent rate performance in potassium-ion batteries(KIBs), significantly better than in lithium-ion batteries(LIBs), with capacity retention of 66% for the KIB vs. 28% for the LIB from 0.1 to 0.5 A g^(-1). It also shows a high reversible capacity of ~230 mAh g^(-1) at 0.2 A g^(-1), 75% capacity retention over350 cycles at 0.4 A g^(-1)and the highest rate performance(based on the total electrode weight) among graphite electrodes for K+ storage reported so far.展开更多
Background and purpose:Stent retriever thrombectomy is the standard therapeutic approach for ischemic stroke with acute large-vessel occlusion.This study evaluated the safety and efficacy of a new thrombectomy device(...Background and purpose:Stent retriever thrombectomy is the standard therapeutic approach for ischemic stroke with acute large-vessel occlusion.This study evaluated the safety and efficacy of a new thrombectomy device(Skyflow)in the treatment of acute ischemic stroke.Methods:After an arterial occlusion model was established,stent-retriever thrombectomy was performed.Digital subtraction angiography(DSA)and autopsy were carried out immediately after thrombectomy in six animals in the acute experimental group.Simulated stent-retriever thrombectomy was performed for three animals in the subacute experimental group,and follow-up angiography and vascular pathological examination were assessed 90 days after the operation.In the clinical trial,192 patients with intracranial anterior circulation large vessel occlusion,within 8 h of symptom onset,were included to undergo thrombectomy with either Skyflow or Solitaire FR stent retriever.Efficacy and safety endpoints were recorded(including successful reperfusion,favorable clinical outcomes,time from puncture to reperfusion,instrument operation success rates and National Institutes of Health Stroke Scale(NIHSS)scores at 7 days for efficacy endpoints,and symptomatic intracranial hemorrhage(sICH),subarachnoid hemorrhage(SAH)and all-cause mortality rates for safety endpoints).Results:All blood vessels achieved successful recanalization in the animal models.In the clinical trial,successful recanalization was attained in 88.4%of patients of the Skyflow group,which was comparable to that of the Solitaire FR group(82.5%)in the full analysis set of the clinical trial.There were no severe complications on DSA,an animal autopsy,or vessel pathological examination in animal experiments.Additionally,no statistically significant difference was observed between the Skyflow and Solitaire FR groups in the clinical trial regarding the safety endpoints.Conclusion:This study showed that the new Skyflow stent retriever is safe and effective for the treatment of acute large vessel occlusion,as demonstrated in our animal study and human trial.展开更多
With the fast development of Qingdao's economy, the energy consumption is increasing significantly. In this paper, based on the energy statistic data in Qingdao area from 2010 to 2015,energy consumption structure ...With the fast development of Qingdao's economy, the energy consumption is increasing significantly. In this paper, based on the energy statistic data in Qingdao area from 2010 to 2015,energy consumption structure was analyzed, indicating the existence of single energy structure;that is, coal, petroleum, and natural gas are dominant in the area. Thus, some issues between energy supply and demand have been brought. To solve present problem, we put forward to formulate the development strategy of energy, including energy savings, the exploitation of petroleum and natural gas resources, the development and utilization of renewable energy sources, and energy policy. It is worthy of mentioning that, according to the geological investigation, the shale gas may be abundant in Qingdao area and the gas resource amount estimated is huge. This is our first finding, important for developing unconventional energy and adjusting the energy structure in Qingdao in the future. Therefore, we suggest that Qingdao government should take action to develop local new energy resources for satisfying the energy demand.展开更多
Transition metal selenides are regarded as prospective conversion-reaction anodes for potassium-ion batteries(PIBs)because of their relatively high electrical conductivity,large theoretical specific capacity,abundant ...Transition metal selenides are regarded as prospective conversion-reaction anodes for potassium-ion batteries(PIBs)because of their relatively high electrical conductivity,large theoretical specific capacity,abundant resources and low cost.The challenge of the metal selenides originates from a serious volume change during cycling,which induces serious structural collapse and fast capacity degradation.In the present work,the multi-dimensional carbon nano-architectures confined bimetallic selenides(ZnSe/CoSe_(2)@N-CNTs/rGO)were constructed by a facile MOF-assisted strategy.In such special nanoarchitectures,N-doped CNTs protect the metal selenides centers from serious volume expansion/electrode pulverization,as well as improve the sluggish kinetics.ZnSe/CoSe_(2)@N-CNTs/rGO electrode boosts the lifespan of half PIBs with a large discharge specific capacity of 200 m Ah g^(-1)at 2 A g^(-1)after 3800 cycles.The full PIBs battery with ZnSe/CoSe_(2)@N-CNTs/rGO electrode as anode and Prussian blue as cathode exhibits well electrochemical performance(151 m Ah g^(-1)at 100 m A g^(-1)after 100 cycles).DFT calculation suggests that the CNTs could change the K+adsorption energy and decrease K+diffusion energy barrier,which dramatically enhances K+storage kinetics.This work offers an effective material engineering approach for designing hierarchical“all-in-one”electrodes with high excellent cycling stability for PIBs.展开更多
Objective:To evaluate the safety and efficacy of the SeparGateballoon-guiding catheter(BGC)for blocking flow and delivering devices in neurointerventional surgery.Method:This prospective multicenter single-arm trial e...Objective:To evaluate the safety and efficacy of the SeparGateballoon-guiding catheter(BGC)for blocking flow and delivering devices in neurointerventional surgery.Method:This prospective multicenter single-arm trial enrolled patients who received BGC adjuvant therapy to provide temporary blood flow arrest of the supra-aortic arch arteries and their branch vessels in interventional therapy.The primary endpoint was immediate procedural success rate in flow arrest,device delivery,and withdrawal.The efficacy endpoints were intraoperative product performance,including rigidity,smoothness,fracture resistance of the catheter wall,catheter push performance,compatibility and radiopaque display,integrity,adhesion thrombus after withdrawal and balloon rupture.The safety endpoints were adverse and serious adverse events associated with the test device and serious adverse events resulting in death or serious health deterioration.Result:A total of 129 patients were included;of them,128 were analyzed in the full analysis set(FAS)and per protocol set(PPS).Immediate procedural success was achieved in 97.7%of patients with FAS and PPS.The lower bound of the 95%confidence interval was 94.6%,higher than the preset efficacy margin of 94%.Device-related adverse events occurred in 2(1.6%)cases.One was mild adverse event of vasospasm,which resolved spontaneously.The other was serious adverse event of dissection aggravation,which was treated with stenting angioplasty.No device defects were observed.Conclusion:In neurointerventional surgery,the SeparGateBGC can be used to temporarily block the flow of the supra-aortic arch arteries and their branch vessels and guide the interventional device to the target vascular position.展开更多
Lithium-oxygen batteries are among the most promising electrochemical energy storage systems,which have attracted significant attention in the past few years duo to its far more energy density than lithium-ion batteri...Lithium-oxygen batteries are among the most promising electrochemical energy storage systems,which have attracted significant attention in the past few years duo to its far more energy density than lithium-ion batteries.Lithium oxygen battery energy storage is a reactive storage mechanism,and the discharge and charge processes are usually called oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Consequently,complex systems usually create complex problems,lithium oxygen batteries also face many problems,such as excessive accumulation of discharge products(Li_(2)O_(2))in the cathode pores,resulting in reduced capacity,unstable cycling performance and so on.Cathode catalyst,which could influence the kinetics of OER and ORR in lithium oxygen(Li-O_(2))battery,is one of the decisive factors to determine the electrochemical performance of the battery,so the design of cathode catalyst is vitally important.This review discusses the catalytic cathode materials,which are divided into four parts,carbon based materials,metals and metal oxides,composite materials and other materials.展开更多
A robust three-dimensional(3D)interconnected sulfur host and a polysulfide-proof interlayer are key components in high-performance Li–S batteries.Herein,cellulose-based 3D hierarchical porous carbon(HPC)and two-dimen...A robust three-dimensional(3D)interconnected sulfur host and a polysulfide-proof interlayer are key components in high-performance Li–S batteries.Herein,cellulose-based 3D hierarchical porous carbon(HPC)and two-dimensional(2D)lamellar porous carbon(LPC)are employed as the sulfur host and polysulfide-proof inter-layer,respectively,for a Li–S battery.The 3D HPC displays a cross-linked macroporous structure,which allows high sulfur loading and restriction capability and provides unobstructed electrolyte diffusion channels.With a stackable carbon sheet of 2D LPC that has a large plane view size and is ultrathin and porous,the LPC-coated separator effectively inhibits polysulfides.An optimized combination of the HPC and LPC yields an electrode structure that effectively protects the lithium anode against corrosion by polysulfides,giving the cell a high ca-pacity of 1339.4 mAh g^(-1) and high stability,with a capacity decay rate of 0.021% per cycle at 0.2C.This work provides a new understanding of biomaterials and offers a novel strategy to improve the performance of Li–S batteries for practical applications.展开更多
Potassium-based energy storage technologies,especially potassium ion batteries(PIBs),have received great interest over the past decade.A pivotal challenge facing high-performance PIBs is to identify advanced electrode...Potassium-based energy storage technologies,especially potassium ion batteries(PIBs),have received great interest over the past decade.A pivotal challenge facing high-performance PIBs is to identify advanced electrode materials that can store the large-radius K+ions,as well as to tailor the various thermodynamic parameters.Metal chalcogenides are one of the most promising anode materials,having a high theoretical specific capacity,high in-plane electrical conductivity,and relatively small volume change on charge/discharge.However,the development of metal chalcogenides for PIBs is still in its infancy because of the limited choice of high-performance electrode materials.However,numerous efforts have been made to conquer this challenge.In this article,we overview potassium storage mechanisms,the technical hurdles,and the optimization strategies for metal chalcogenides and highlight how the adjustment of the crystalline structure and choice of the electrolyte affect the electrochemical performance of metal-chalcogenide-based electrode materials.Other potential potassium-based energy storage systems to which metal chalcogenides can be applied are also discussed.Finally,future research directions focusing on metal chalcogenides for potassium storage are proposed.展开更多
The Lingshan Island scientific drill confirms that two episodes(Laiyang period and Qingshan period) of rifting developed in the central Sulu orogenic belt(SOB) in Late Mesozoic. With a set of methods including fieldwo...The Lingshan Island scientific drill confirms that two episodes(Laiyang period and Qingshan period) of rifting developed in the central Sulu orogenic belt(SOB) in Late Mesozoic. With a set of methods including fieldwork, drilling, core logging, zircon U-Pb dating and whole rock geochemistry applied, the age, the depositional sequence and the deep dynamic mechanisms of rift evolution were unraveled. The stratigraphic sequence of the Laiyang-Qingshan Groups on Lingshan Island was composed of two different rifting sequences:(1) Laiyang Group(147–125 Ma), which consists of deep-water gravity flow deposits with interlayers of intermediate volcanic rocks;and(2) Lower Qingshan Group(125–119 Ma), which unconformably overlies the former sequence and contains subaerial volcanic deposits and terrestrial deposits. The tectonic environment changed during the evolution of these two episodes of rifting: the rift was in a NNW-SSE extensional environment in the Laiyang period and showed the typical passive rifting character that “lithospheric extension and rifting preceded volcanism”. The passive rifting period was ended by a short WNW-ESE compression at about 125 Ma. After that, the tectonic environment transferred to a strong NW-SE extensional environment and the rifting evolved into a volcanic arc basin in the Qingshan period. The igneous rocks are shoshonitic to high-K calc-alkaline trachyandesites to trachytes with a few intercalated lamprophyres and a rhyolite.The geochemical characteristics of the igneous rocks indicate that they are mantle-derived melts with a metasomatized mantle source and/or crustal contamination. In addition, an increased thinning of the lithosphere happened during the rifting episodes.The low-angle subduction of the Paleo-Pacific plate in the Jurassic weakened the thickened SOB lithospheric mantle. The rollback of the subducting plate started in late Jurassic to early Cretaceous, and the SOB lithospheric mantle was delaminated synchronously because of the gravity collapse. Thus, this caused passive rifting in the Laiyang period. Thereafter, the rollback and trench retreat of the high-angle subducting Paleo-Pacific plate would have achieved its climax, resulting in the strong regional extension. Passive rifting was ended by the crustal uplift caused by asthenospheric upwelling beneath the rift. The lower crust was heated by the upwelling asthenosphere and partially melted to form felsic melts, which were emplaced upwards and erupted explosively. The rift evolved into a volcanic arc basin in the Qingshan period and showed some characteristics of active rifting. Above all, a passive rifting in the Laiyang period and a volcanic arc basin in the Qingshan period developed successively in the Lingshan Island area(the central SOB). This records the transfer of the study area from the Paleo-Tethys tectonic domain to the circum-Pacific tectonic domain. The delamination of SOB lithospheric mantle and the upwelling of asthenospheric material were the deep dynamic mechanisms driving the development and evolution of two rift episodes. Additionally, the rift development was controlled remotely by the subduction of the Paleo-Pacific plate.展开更多
Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in pati...Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in patient HCC and inversely correlated with HCC malignancy and patient survival.Moreover,our data suggested that the HNF3γreduction in HCC could be mediated by METTL14-dependent m6A methylation of HNF3γmRNA.HNF3γexpression was increased during hepatic differentiation and decreased in dedifferentiated HCC cells.Interestingly,HNF3γdelivery promoted differentiation of not only HCC cells but also liver CSCs,which led to suppression of HCC growth.Mechanistic analysis suggested an HNF3γ-centered regulatory network that includes essential liver differentiation-associated transcription factors and functional molecules,which could synergistically facilitate HCC cell differentiation.More importantly,enforced HNF3γexpression sensitized HCC cells to sorafenib-induced growth inhibition and cell apoptosis through transactivation of OATP1B1 and OATP1B3 expression,which are major membrane transporters for sorafenib uptake.Clinical investigation showed that patient-derived HCC xenografts with high HNF3γexpression exhibited a sorafenib response and patients with high HCC HNF3γlevels benefited from sorafenib therapy.Together,these results suggest that HNF3γplays an essential role in HCC differentiation and may serve as a therapeutic target and predictor of sorafenib benefit in patients.展开更多
The Sulu orogenic belt is an uplift zone that was formed in the Late Triassic.Several Jurassic to Cretaceous sedimentary successions have been recognized within the Sulu orogenic belt in recent studies,including outcr...The Sulu orogenic belt is an uplift zone that was formed in the Late Triassic.Several Jurassic to Cretaceous sedimentary successions have been recognized within the Sulu orogenic belt in recent studies,including outcrops that are considered to be related to the newly discovered Riqingwei Basin.This basin has been the focus of extensive study due to its continuous Cretaceous rock sequence,geological location and petroleum resource potential.However,the lack of a consolidated chronology for the strata has precluded a better understanding of stratigraphy,tectonic evolution and resource potential of the Riqingwei Basin.Here,we present the results of a new magnetostratigraphic study of the continental scientific drilling borehole LK-1,which is located on Lingshan Island,offshore Shandong province,eastern China.The goals of this study are to(1)refine the Late Jurassic to Early Cretaceous chronostratigraphic framework of the Riqingwei Basin,and(2)investigate the location of the J/K boundary in the Borehole Core LK-1.The observed patterns of the paleomagnetic polarity zone in the LK-1 borehole correlate well with the geomagnetic polarity time scale(GPTS),and the continuous magnetostratigraphy profile defined in this core indicates an age ranging from 146.5 to 125.8 Ma for the samples interval.The sediment accumulation rates(SAR)of LK-1 show one period of high SAR(~10.5 cm kyr^(-1))at 135.3–130.6 Ma and two periods of low SAR(~4.8 and~2.2 cm kyr^(-1))at145.7–135.3 and 130.6–125.8 Ma,respectively.In addition,the magnetostratigraphic results suggest that the Jurassic-Cretaceous(J/K)boundary of the LK-1 is located within the magnetozone N21.2 n(~1254 m).This comprehensive geochronologic framework provides a good correlation of the marine Upper Jurassic to Lower Cretaceous strata in the Riqingwei Basin to other marine strata and continental sequences,in addition to providing a foundation for the study of the structural evolution of eastern China.展开更多
On November 27,2021,a 67-year-old male returning from Canada via airplane was transferred to the central isolation hotel in Shanghai.During the quarantine,his 1st,4th,7th,and 14th days of specimens returned negative f...On November 27,2021,a 67-year-old male returning from Canada via airplane was transferred to the central isolation hotel in Shanghai.During the quarantine,his 1st,4th,7th,and 14th days of specimens returned negative for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which causes coronavirus disease 2019(COVID-19).On December 11,he completed 14 days of centralized isolation and returned to Guangzhou from Shanghai via airplane,then he was closed-loop transferred to Yuexiu District for a 7-day home isolation.On December 12,the local Community Health Service Center routinely collected his throat swab and the result returned to COVID-19 positive on December 13,2021.He was transported to the Guangzhou Eighth People’s Hospital for isolated treatment by negative pressure ambulance on the same day.The patient had two inflamed lungs according to the chest computed tomography(CT)examination,but his most recently updated condition was stable.An estimated 600 close contacts were identified and were placed in centralized isolation.On December 16,one of the close contacts,a 70-year-old female also tested positive for COVID-19.She lived on the lower floor of the same type of apartment as the imported case and spent 19 hours in the same building.展开更多
The measurement accuracy of the Mobile Mapping System (MMS) is the main problem, which restricts its development and application, so how to calibrate the MMS to improve its measure-ment accuracy has always been a rese...The measurement accuracy of the Mobile Mapping System (MMS) is the main problem, which restricts its development and application, so how to calibrate the MMS to improve its measure-ment accuracy has always been a research hotspot in the industry. This paper proposes a position and attitude calibration method with error correction based on the combination of the feature point and feature surface. First, the initial value of the spatial position relation-ship between each sensor of MMS is obtained by close-range photogrammetry. Second, the optimal solution for error correction is calculated by feature points in global coordinates jointly measured with International GNSS Service (IGS) stations. Then, the final transformation para-meters are solved by combining the initial values obtained originally, thereby realizing the rapid calibration of the MMS. Finally, it analyzed the RMSE of MMS point cloud after calibration, and the results demonstrate the feasibility of the calibration approach proposed by this method. Under the condition of a single measurement sensor accuracy is low, the plane and elevation absolute accuracy of the point cloud after calibration can reach 0.043 m and 0.072 m, respectively, and the relative accuracy is smaller than 0.02 m. It meets the precision require-ments of data acquisition for MMS. It is of great significance for promoting the development of MMS technology and the application of some novel techniques in the future, such as auton-omous driving, digital twin city, urban brain et al.展开更多
Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in pati...Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in patient HCC and inversely correlated with HCC malignancy and patient survival.Moreover,our data suggested that the HNF3γreduction in HCC could be mediated by METTL14-dependent m6A methylation of HNF3γmRNA.HNF3γexpression was increased during hepatic differentiation and decreased in dedifferentiated HCC cells.Interestingly,HNF3γdelivery promoted differentiation of not only HCC cells but also liver CSCs,which led to suppression of HCC growth.Mechanistic analysis suggested an HNF3γ-centered regulatory network that includes essential liver differentiation-associated transcription factors and functional molecules,which could synergistically facilitate HCC cell differentiation.More importantly,enforced HNF3γexpression sensitized HCC cells to sorafenib-induced growth inhibition and cell apoptosis through transactivation of OATP1B1 and OATP1B3 expression,which are major membrane transporters for sorafenib uptake.Clinical investigation showed that patient-derived HCC xenografts with high HNF3γexpression exhibited a sorafenib response and patients with high HCC HNF3γlevels benefited from sorafenib therapy.Together,these results suggest that HNF3γplays an essential role in HCC differentiation and may serve as a therapeutic target and predictor of sorafenib benefit in patients.展开更多
基金funded by The Henan Province Young and Middle-aged Health Science and Technology Innovation Young Talent Training Project(,Grant/Award Number:YXKC20200041)National Health Commission Capacity Building and Continuing Education Project(Grant/Award Number:GWJJ2023100101)
文摘Background:Previous single-center studies have demonstrated that drug-coated balloons(DCBs)may reduce restenosis rates,which is an important factor affecting the prognosis for intracranial interventional therapy.However,currently available cardiac DCBs are not always suitable for the treatment of intracranial atherosclerotic stenosis(ICAS).This study aimed to evaluate the safety and efficacy of a novel DCB catheter designed for patients with severely symptomatic ICAS.Methods:This prospective,multicenter,single-arm,target-value clinical trial was conducted in 9 Chinese stroke centers to evaluate the safety and efficacy of a novel DCB catheter for treating symptomatic severe ICAS.Primary metrics and other indicators were collected and analyzed using SAS version 9.4(SAS Institute,Cary,NC,USA).Results:A total of 155 patients were enrolled in this study.The preliminary collection of follow-up data has been completed,while data quality control is ongoing.Conclusion:Results of this study demonstrated the patency rate,safety,and effectiveness of a novel on-label paclitaxel DCB designed for the treatment of ICAS.Ethics and dissemination:This study,involving human participants,was reviewed and approved by the Ethics Committee of Drugs(Devices)Clinical Experiment at Henan Provincial People’s Hospital(reference number:2020-145-03)and other research centers participating in the clinical trial.The results of this study will be presented at international conferences and sent to peer-reviewed journals for publication.Standard protocol items:The Recommendations for Interventional Trials checklist was used when drafting the study protocol.Trial registration number:Registered with the Chinese Clinical Trial Registry on June 11,2021(Chi CTR2100047223).
基金Support from the Australian Research Council through a Discovery project (DP170102406)Future Fellowship project (FT150100109)+1 种基金Auto CRC 2020 (Project 1-117)funded by an Australian Research Council grant (LE0237478)
文摘Engineering design of battery configurations and new battery system development are alternative approaches to achieve high performance batteries. A novel flexible and ultra-light graphite anode is fabricated by simple friction drawing on filter paper with a commercial 8 B pencil.Compared with the traditional anode using copper foil as current collector, this innovative current-collector-free design presents capacity improvement of over 200% by reducing the inert weight of the electrode. The as-prepared pencil-trace electrode exhibits excellent rate performance in potassium-ion batteries(KIBs), significantly better than in lithium-ion batteries(LIBs), with capacity retention of 66% for the KIB vs. 28% for the LIB from 0.1 to 0.5 A g^(-1). It also shows a high reversible capacity of ~230 mAh g^(-1) at 0.2 A g^(-1), 75% capacity retention over350 cycles at 0.4 A g^(-1)and the highest rate performance(based on the total electrode weight) among graphite electrodes for K+ storage reported so far.
基金supported by the Co-construction of Provincial and Ministry Youth Project(SBGJ202003004)Key Research and Development Program of Henan Province(Scientific and Technological Project of Henan Province)(202102310037)
文摘Background and purpose:Stent retriever thrombectomy is the standard therapeutic approach for ischemic stroke with acute large-vessel occlusion.This study evaluated the safety and efficacy of a new thrombectomy device(Skyflow)in the treatment of acute ischemic stroke.Methods:After an arterial occlusion model was established,stent-retriever thrombectomy was performed.Digital subtraction angiography(DSA)and autopsy were carried out immediately after thrombectomy in six animals in the acute experimental group.Simulated stent-retriever thrombectomy was performed for three animals in the subacute experimental group,and follow-up angiography and vascular pathological examination were assessed 90 days after the operation.In the clinical trial,192 patients with intracranial anterior circulation large vessel occlusion,within 8 h of symptom onset,were included to undergo thrombectomy with either Skyflow or Solitaire FR stent retriever.Efficacy and safety endpoints were recorded(including successful reperfusion,favorable clinical outcomes,time from puncture to reperfusion,instrument operation success rates and National Institutes of Health Stroke Scale(NIHSS)scores at 7 days for efficacy endpoints,and symptomatic intracranial hemorrhage(sICH),subarachnoid hemorrhage(SAH)and all-cause mortality rates for safety endpoints).Results:All blood vessels achieved successful recanalization in the animal models.In the clinical trial,successful recanalization was attained in 88.4%of patients of the Skyflow group,which was comparable to that of the Solitaire FR group(82.5%)in the full analysis set of the clinical trial.There were no severe complications on DSA,an animal autopsy,or vessel pathological examination in animal experiments.Additionally,no statistically significant difference was observed between the Skyflow and Solitaire FR groups in the clinical trial regarding the safety endpoints.Conclusion:This study showed that the new Skyflow stent retriever is safe and effective for the treatment of acute large vessel occlusion,as demonstrated in our animal study and human trial.
基金supported by Fundamental Research Funds for the Central Universities:[Grant Number 15CX05070A]
文摘With the fast development of Qingdao's economy, the energy consumption is increasing significantly. In this paper, based on the energy statistic data in Qingdao area from 2010 to 2015,energy consumption structure was analyzed, indicating the existence of single energy structure;that is, coal, petroleum, and natural gas are dominant in the area. Thus, some issues between energy supply and demand have been brought. To solve present problem, we put forward to formulate the development strategy of energy, including energy savings, the exploitation of petroleum and natural gas resources, the development and utilization of renewable energy sources, and energy policy. It is worthy of mentioning that, according to the geological investigation, the shale gas may be abundant in Qingdao area and the gas resource amount estimated is huge. This is our first finding, important for developing unconventional energy and adjusting the energy structure in Qingdao in the future. Therefore, we suggest that Qingdao government should take action to develop local new energy resources for satisfying the energy demand.
基金supported by the National Natural Science Foundation of China(21806187,51802357)。
文摘Transition metal selenides are regarded as prospective conversion-reaction anodes for potassium-ion batteries(PIBs)because of their relatively high electrical conductivity,large theoretical specific capacity,abundant resources and low cost.The challenge of the metal selenides originates from a serious volume change during cycling,which induces serious structural collapse and fast capacity degradation.In the present work,the multi-dimensional carbon nano-architectures confined bimetallic selenides(ZnSe/CoSe_(2)@N-CNTs/rGO)were constructed by a facile MOF-assisted strategy.In such special nanoarchitectures,N-doped CNTs protect the metal selenides centers from serious volume expansion/electrode pulverization,as well as improve the sluggish kinetics.ZnSe/CoSe_(2)@N-CNTs/rGO electrode boosts the lifespan of half PIBs with a large discharge specific capacity of 200 m Ah g^(-1)at 2 A g^(-1)after 3800 cycles.The full PIBs battery with ZnSe/CoSe_(2)@N-CNTs/rGO electrode as anode and Prussian blue as cathode exhibits well electrochemical performance(151 m Ah g^(-1)at 100 m A g^(-1)after 100 cycles).DFT calculation suggests that the CNTs could change the K+adsorption energy and decrease K+diffusion energy barrier,which dramatically enhances K+storage kinetics.This work offers an effective material engineering approach for designing hierarchical“all-in-one”electrodes with high excellent cycling stability for PIBs.
基金supported by the Co-construction of Provincial and Ministry Youth Project(SBGJ202003004)Scientific and Technological Project of Henan Province(202102310037)。
文摘Objective:To evaluate the safety and efficacy of the SeparGateballoon-guiding catheter(BGC)for blocking flow and delivering devices in neurointerventional surgery.Method:This prospective multicenter single-arm trial enrolled patients who received BGC adjuvant therapy to provide temporary blood flow arrest of the supra-aortic arch arteries and their branch vessels in interventional therapy.The primary endpoint was immediate procedural success rate in flow arrest,device delivery,and withdrawal.The efficacy endpoints were intraoperative product performance,including rigidity,smoothness,fracture resistance of the catheter wall,catheter push performance,compatibility and radiopaque display,integrity,adhesion thrombus after withdrawal and balloon rupture.The safety endpoints were adverse and serious adverse events associated with the test device and serious adverse events resulting in death or serious health deterioration.Result:A total of 129 patients were included;of them,128 were analyzed in the full analysis set(FAS)and per protocol set(PPS).Immediate procedural success was achieved in 97.7%of patients with FAS and PPS.The lower bound of the 95%confidence interval was 94.6%,higher than the preset efficacy margin of 94%.Device-related adverse events occurred in 2(1.6%)cases.One was mild adverse event of vasospasm,which resolved spontaneously.The other was serious adverse event of dissection aggravation,which was treated with stenting angioplasty.No device defects were observed.Conclusion:In neurointerventional surgery,the SeparGateBGC can be used to temporarily block the flow of the supra-aortic arch arteries and their branch vessels and guide the interventional device to the target vascular position.
基金We thank the financial support from the National Natural Science Foundation of China(52172173,51872071)Anhui Provincial Natural Science Foundation for Distinguished Young Scholar(2108085J25)+2 种基金Anhui Provincial Natural Science Foundation for Outstanding Young Scholar(2208085Y05)Anhui Province Key Laboratory of Environment-Friendly Polymer Materials,the Natural Science Research Projects of Universities in Anhui Province(KJ2020A0021)Guangxi Key Laboratory of Low Carbon Energy Materials(2021GXKLLCEM04).
文摘Lithium-oxygen batteries are among the most promising electrochemical energy storage systems,which have attracted significant attention in the past few years duo to its far more energy density than lithium-ion batteries.Lithium oxygen battery energy storage is a reactive storage mechanism,and the discharge and charge processes are usually called oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Consequently,complex systems usually create complex problems,lithium oxygen batteries also face many problems,such as excessive accumulation of discharge products(Li_(2)O_(2))in the cathode pores,resulting in reduced capacity,unstable cycling performance and so on.Cathode catalyst,which could influence the kinetics of OER and ORR in lithium oxygen(Li-O_(2))battery,is one of the decisive factors to determine the electrochemical performance of the battery,so the design of cathode catalyst is vitally important.This review discusses the catalytic cathode materials,which are divided into four parts,carbon based materials,metals and metal oxides,composite materials and other materials.
基金The authors gratefully acknowledge the financial support by the Joint Funds of the Natural Science Basic Research Project of Shaanxi Province(2021JLM-23)University Joint Project of Shaanxi Province(2021GXLH-Z-067)+3 种基金Anhui Provincial Natural Science Foundation for Outstanding Young Scholar(2208085Y05)Anhui Provincial Scientific Reuter Foundation for Returned Scholars(2022LCX030)the National Natural Science Foundation of China(51801144)Guangxi Key Labo-ratory of Low Carbon Energy Material(2021GXKLLCEM04)。
文摘A robust three-dimensional(3D)interconnected sulfur host and a polysulfide-proof interlayer are key components in high-performance Li–S batteries.Herein,cellulose-based 3D hierarchical porous carbon(HPC)and two-dimensional(2D)lamellar porous carbon(LPC)are employed as the sulfur host and polysulfide-proof inter-layer,respectively,for a Li–S battery.The 3D HPC displays a cross-linked macroporous structure,which allows high sulfur loading and restriction capability and provides unobstructed electrolyte diffusion channels.With a stackable carbon sheet of 2D LPC that has a large plane view size and is ultrathin and porous,the LPC-coated separator effectively inhibits polysulfides.An optimized combination of the HPC and LPC yields an electrode structure that effectively protects the lithium anode against corrosion by polysulfides,giving the cell a high ca-pacity of 1339.4 mAh g^(-1) and high stability,with a capacity decay rate of 0.021% per cycle at 0.2C.This work provides a new understanding of biomaterials and offers a novel strategy to improve the performance of Li–S batteries for practical applications.
基金Australian Research Council,Grant/Award Numbers:DE190100504,DP170102406,DP200101862Chinese Scholarship Council,Grant/Award Number:201908420279+2 种基金National Natural Science Foundation of China,Grant/Award Number:51802357Financial support provided by the Australian Research Council(ARC)(DE190100504,DP170102406,and DP200101862)and the National Natural Science Foundation of China(51802357)are gratefully acknowledged.Y.L.acknowledges the financial support from Chinese Scholarship Council(File No.201908420279).
文摘Potassium-based energy storage technologies,especially potassium ion batteries(PIBs),have received great interest over the past decade.A pivotal challenge facing high-performance PIBs is to identify advanced electrode materials that can store the large-radius K+ions,as well as to tailor the various thermodynamic parameters.Metal chalcogenides are one of the most promising anode materials,having a high theoretical specific capacity,high in-plane electrical conductivity,and relatively small volume change on charge/discharge.However,the development of metal chalcogenides for PIBs is still in its infancy because of the limited choice of high-performance electrode materials.However,numerous efforts have been made to conquer this challenge.In this article,we overview potassium storage mechanisms,the technical hurdles,and the optimization strategies for metal chalcogenides and highlight how the adjustment of the crystalline structure and choice of the electrolyte affect the electrochemical performance of metal-chalcogenide-based electrode materials.Other potential potassium-based energy storage systems to which metal chalcogenides can be applied are also discussed.Finally,future research directions focusing on metal chalcogenides for potassium storage are proposed.
基金supported by the Key R&D Plan of Shandong Province (Grant No. 2017CXGC1608)the Project of Department of Science and Technology of Sinopec (Grant No. P20028)+1 种基金the Shandong Natural Science Foundation Youth Fund Project (Grant No. ZR2020QD026)the Fundamental Research Funds for the Central Universities (Grant Nos. 18CX06019A, 19CX05004A)。
文摘The Lingshan Island scientific drill confirms that two episodes(Laiyang period and Qingshan period) of rifting developed in the central Sulu orogenic belt(SOB) in Late Mesozoic. With a set of methods including fieldwork, drilling, core logging, zircon U-Pb dating and whole rock geochemistry applied, the age, the depositional sequence and the deep dynamic mechanisms of rift evolution were unraveled. The stratigraphic sequence of the Laiyang-Qingshan Groups on Lingshan Island was composed of two different rifting sequences:(1) Laiyang Group(147–125 Ma), which consists of deep-water gravity flow deposits with interlayers of intermediate volcanic rocks;and(2) Lower Qingshan Group(125–119 Ma), which unconformably overlies the former sequence and contains subaerial volcanic deposits and terrestrial deposits. The tectonic environment changed during the evolution of these two episodes of rifting: the rift was in a NNW-SSE extensional environment in the Laiyang period and showed the typical passive rifting character that “lithospheric extension and rifting preceded volcanism”. The passive rifting period was ended by a short WNW-ESE compression at about 125 Ma. After that, the tectonic environment transferred to a strong NW-SE extensional environment and the rifting evolved into a volcanic arc basin in the Qingshan period. The igneous rocks are shoshonitic to high-K calc-alkaline trachyandesites to trachytes with a few intercalated lamprophyres and a rhyolite.The geochemical characteristics of the igneous rocks indicate that they are mantle-derived melts with a metasomatized mantle source and/or crustal contamination. In addition, an increased thinning of the lithosphere happened during the rifting episodes.The low-angle subduction of the Paleo-Pacific plate in the Jurassic weakened the thickened SOB lithospheric mantle. The rollback of the subducting plate started in late Jurassic to early Cretaceous, and the SOB lithospheric mantle was delaminated synchronously because of the gravity collapse. Thus, this caused passive rifting in the Laiyang period. Thereafter, the rollback and trench retreat of the high-angle subducting Paleo-Pacific plate would have achieved its climax, resulting in the strong regional extension. Passive rifting was ended by the crustal uplift caused by asthenospheric upwelling beneath the rift. The lower crust was heated by the upwelling asthenosphere and partially melted to form felsic melts, which were emplaced upwards and erupted explosively. The rift evolved into a volcanic arc basin in the Qingshan period and showed some characteristics of active rifting. Above all, a passive rifting in the Laiyang period and a volcanic arc basin in the Qingshan period developed successively in the Lingshan Island area(the central SOB). This records the transfer of the study area from the Paleo-Tethys tectonic domain to the circum-Pacific tectonic domain. The delamination of SOB lithospheric mantle and the upwelling of asthenospheric material were the deep dynamic mechanisms driving the development and evolution of two rift episodes. Additionally, the rift development was controlled remotely by the subduction of the Paleo-Pacific plate.
基金supported by Ministry of Education(MOE)Key Laboratory on Signaling Regulation and Targeting Therapy of Liver Cancer and Shanghai Key Laboratory of Hepatobiliary Tumor Biologysupported by grants from the National Natural Science Foundation of China 81972222,81772582,and 81702736,National Key R&D Program of China(2017YFA0504503)Program of Shanghai Academic Research Leader(18XD1405400).
文摘Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in patient HCC and inversely correlated with HCC malignancy and patient survival.Moreover,our data suggested that the HNF3γreduction in HCC could be mediated by METTL14-dependent m6A methylation of HNF3γmRNA.HNF3γexpression was increased during hepatic differentiation and decreased in dedifferentiated HCC cells.Interestingly,HNF3γdelivery promoted differentiation of not only HCC cells but also liver CSCs,which led to suppression of HCC growth.Mechanistic analysis suggested an HNF3γ-centered regulatory network that includes essential liver differentiation-associated transcription factors and functional molecules,which could synergistically facilitate HCC cell differentiation.More importantly,enforced HNF3γexpression sensitized HCC cells to sorafenib-induced growth inhibition and cell apoptosis through transactivation of OATP1B1 and OATP1B3 expression,which are major membrane transporters for sorafenib uptake.Clinical investigation showed that patient-derived HCC xenografts with high HNF3γexpression exhibited a sorafenib response and patients with high HCC HNF3γlevels benefited from sorafenib therapy.Together,these results suggest that HNF3γplays an essential role in HCC differentiation and may serve as a therapeutic target and predictor of sorafenib benefit in patients.
基金supported by the National Natural Science Foundation of China(Grant Nos.42002030,42072169)National Science and Technology Major Project(Grant No.2016ZX05024-002-001)+1 种基金the Key R&D Plan of Shandong Province(Grant No.2017CXGC1608)the Natural Science Foundation of Shandong Province(Grant No.ZR201910280267)。
文摘The Sulu orogenic belt is an uplift zone that was formed in the Late Triassic.Several Jurassic to Cretaceous sedimentary successions have been recognized within the Sulu orogenic belt in recent studies,including outcrops that are considered to be related to the newly discovered Riqingwei Basin.This basin has been the focus of extensive study due to its continuous Cretaceous rock sequence,geological location and petroleum resource potential.However,the lack of a consolidated chronology for the strata has precluded a better understanding of stratigraphy,tectonic evolution and resource potential of the Riqingwei Basin.Here,we present the results of a new magnetostratigraphic study of the continental scientific drilling borehole LK-1,which is located on Lingshan Island,offshore Shandong province,eastern China.The goals of this study are to(1)refine the Late Jurassic to Early Cretaceous chronostratigraphic framework of the Riqingwei Basin,and(2)investigate the location of the J/K boundary in the Borehole Core LK-1.The observed patterns of the paleomagnetic polarity zone in the LK-1 borehole correlate well with the geomagnetic polarity time scale(GPTS),and the continuous magnetostratigraphy profile defined in this core indicates an age ranging from 146.5 to 125.8 Ma for the samples interval.The sediment accumulation rates(SAR)of LK-1 show one period of high SAR(~10.5 cm kyr^(-1))at 135.3–130.6 Ma and two periods of low SAR(~4.8 and~2.2 cm kyr^(-1))at145.7–135.3 and 130.6–125.8 Ma,respectively.In addition,the magnetostratigraphic results suggest that the Jurassic-Cretaceous(J/K)boundary of the LK-1 is located within the magnetozone N21.2 n(~1254 m).This comprehensive geochronologic framework provides a good correlation of the marine Upper Jurassic to Lower Cretaceous strata in the Riqingwei Basin to other marine strata and continental sequences,in addition to providing a foundation for the study of the structural evolution of eastern China.
基金The Basic Research Project of Key Laboratory of Guangzhou(No.202102100001)The Key Project of Medicine Discipline of Guangzhou(No.2021–2023-11).
文摘On November 27,2021,a 67-year-old male returning from Canada via airplane was transferred to the central isolation hotel in Shanghai.During the quarantine,his 1st,4th,7th,and 14th days of specimens returned negative for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which causes coronavirus disease 2019(COVID-19).On December 11,he completed 14 days of centralized isolation and returned to Guangzhou from Shanghai via airplane,then he was closed-loop transferred to Yuexiu District for a 7-day home isolation.On December 12,the local Community Health Service Center routinely collected his throat swab and the result returned to COVID-19 positive on December 13,2021.He was transported to the Guangzhou Eighth People’s Hospital for isolated treatment by negative pressure ambulance on the same day.The patient had two inflamed lungs according to the chest computed tomography(CT)examination,but his most recently updated condition was stable.An estimated 600 close contacts were identified and were placed in centralized isolation.On December 16,one of the close contacts,a 70-year-old female also tested positive for COVID-19.She lived on the lower floor of the same type of apartment as the imported case and spent 19 hours in the same building.
基金This research was funded by the National Natural Science Foundation of China[grant number 41971350 and 41571437]Beijing Advanced Innovation Centre for Future Urban Design Project[grant number UDC2019031724]+4 种基金Teacher Support Program for Pyramid Talent Training Project of Beijing University of Civil Engineering and Architecture[grant number JDJQ20200307]State Key Laboratory of Geo-Information Engineering[grant number SKLGIE2019-Z-3-1]Open Research Fund Program of LIESMARS[grant number 19E01]National Key Research and Development Program of China[grant number 2019YFC1520100]The Fundamental Research Funds for Beijing University of Civil Engineering and Architecture[grant number X18050].
文摘The measurement accuracy of the Mobile Mapping System (MMS) is the main problem, which restricts its development and application, so how to calibrate the MMS to improve its measure-ment accuracy has always been a research hotspot in the industry. This paper proposes a position and attitude calibration method with error correction based on the combination of the feature point and feature surface. First, the initial value of the spatial position relation-ship between each sensor of MMS is obtained by close-range photogrammetry. Second, the optimal solution for error correction is calculated by feature points in global coordinates jointly measured with International GNSS Service (IGS) stations. Then, the final transformation para-meters are solved by combining the initial values obtained originally, thereby realizing the rapid calibration of the MMS. Finally, it analyzed the RMSE of MMS point cloud after calibration, and the results demonstrate the feasibility of the calibration approach proposed by this method. Under the condition of a single measurement sensor accuracy is low, the plane and elevation absolute accuracy of the point cloud after calibration can reach 0.043 m and 0.072 m, respectively, and the relative accuracy is smaller than 0.02 m. It meets the precision require-ments of data acquisition for MMS. It is of great significance for promoting the development of MMS technology and the application of some novel techniques in the future, such as auton-omous driving, digital twin city, urban brain et al.
基金This work was supported by Ministry of Education(MOE)Key Laboratory on Signaling Regulation and Targeting Therapy of Liver Cancer and Shanghai Key Laboratory of Hepatobiliary Tumor BiologyThis work was supported by grants from the National Natural Science Foundation of China 81972222,81772582,and 81702736+1 种基金National Key R&D Program of China(2017YFA0504503)Program of Shanghai Academic Research Leader(18XD1405400).
文摘Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain unclear.Herein,we report that HNF3γexpression is downregulated in patient HCC and inversely correlated with HCC malignancy and patient survival.Moreover,our data suggested that the HNF3γreduction in HCC could be mediated by METTL14-dependent m6A methylation of HNF3γmRNA.HNF3γexpression was increased during hepatic differentiation and decreased in dedifferentiated HCC cells.Interestingly,HNF3γdelivery promoted differentiation of not only HCC cells but also liver CSCs,which led to suppression of HCC growth.Mechanistic analysis suggested an HNF3γ-centered regulatory network that includes essential liver differentiation-associated transcription factors and functional molecules,which could synergistically facilitate HCC cell differentiation.More importantly,enforced HNF3γexpression sensitized HCC cells to sorafenib-induced growth inhibition and cell apoptosis through transactivation of OATP1B1 and OATP1B3 expression,which are major membrane transporters for sorafenib uptake.Clinical investigation showed that patient-derived HCC xenografts with high HNF3γexpression exhibited a sorafenib response and patients with high HCC HNF3γlevels benefited from sorafenib therapy.Together,these results suggest that HNF3γplays an essential role in HCC differentiation and may serve as a therapeutic target and predictor of sorafenib benefit in patients.