Lead-free double perovskites have gained recognition as top luminescent materials due to their environmental friendliness,high chemical stability,structural adjustability,and excellent photoelectric properties.However...Lead-free double perovskites have gained recognition as top luminescent materials due to their environmental friendliness,high chemical stability,structural adjustability,and excellent photoelectric properties.However,the poor modulation of emission restricts their applications,and it is highly desirable to explore stable and efficient double perovskites with multimode luminescence and adjustable spectra for multifunctional photoelectric applications.Herein,the rare earth ions Ln^(3+)(Er^(3+)and Ho^(3+))-doped Cs_(2)NaYCl_(6):Sb^(3+)crystals were synthesized by a simple solvothermal route.The X-ray diffraction pattern(XRD),energy-dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS),and elemental mapping images demonstrate that the Sb^(3+),Er^(3+),and Ho^(3+)ions have been homogeneously incorporated into the Cs_(2)NaYCl_(6)crystals.As anticipated,the emissio n spectra of Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)are composed of two bands.One broad blue band derives from self-trapped exciton(STE)in[SbCl_(6)]3-octahedra while another group of emission peaks stems from the f-f transitions of Ln^(3+)ions.The emission colors of Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)phosphors can be tuned in a wide range by modulating the doping concentrations of Ln^(3+)ions.The efficient energy transfer from STE to Ln^(3+)is the key point to achieving the efficient and tunable emissions Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)samples.Interestingly,Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)can also exhibit characteristic up-conversion luminescence of Ln^(3+)under nearinfrared(NIR)excitation besides the down-conversion luminescence,revealing that the materials may have potential applicability in multimode anti-counterfeiting and information encryption applications.Furthermore,the light emitting diodes(LEDs)assembled by Cs_(2)NaYCl_(6):Sb^(3+)and Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)phosphors display dazzling blue,green,and red emissions under a forward bias current,which indicates that the as-obtained double perovskites materials may have great potential in solid-state lighting and optoelectronic devices.展开更多
Recently,cilia defects have been proposed to contribute to scoliosis.Here,we demonstrate that coiled-coil domain-containing 57(Ccdc57)plays an essential role in straightening the body axis of zebrafish by regulating c...Recently,cilia defects have been proposed to contribute to scoliosis.Here,we demonstrate that coiled-coil domain-containing 57(Ccdc57)plays an essential role in straightening the body axis of zebrafish by regulating ciliary beating in the brain ventricle(BV).Zygotic ccdc57(Zccdc57)mutant zebrafish developes scoliosis without significant changes in their bone density and calcification,and the maternal-zygotic ccdc57(MZccdc57)mutant embryos display curved bodies since the long-pec stage.The expression of ccdc57 is enriched in ciliated tissues and immunofluorescence analysis reveals colocalization of Ccdc57-HA with acetylated a-tubulin,implicating it in having a role in ciliary function.Further examination reveals that it is the coordinated cilia beating of multiple cilia bundles(MCB)in the MZccdc57 mutant embryos that is affected at 48 hours post fertilization,when the compromised cerebrospinal fluid flow and curved body axis have already occurred.Either ccdc57 m RNA injection or epinephrine treatment reverses the spinal curvature in MZccdc57 mutant larvae from ventrally curly to straight or even dorsally curly and significantly upregulates urotensin signaling.This study reveals the role of ccdc57 in maintaining coordinated cilia beating of MCB in the BV.展开更多
The spinel LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)has been attracted great attention as lithium ion cathode material due to its high voltage and large energy density.However,the practical application of LNMO is still limited by...The spinel LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)has been attracted great attention as lithium ion cathode material due to its high voltage and large energy density.However,the practical application of LNMO is still limited by poor cycling stability.Herein,to improve the cycling stability of spinel LNMO,it was treated with anneal process at 900℃for 2 h after prepared by traditional solid-state method(LNMO-A).LNMO-A sample presented better electrochemical property especially under high rate,with capacity of 91.2 mAhg^(-1)after 1000 cycles under 10 C.Its superior electrochemical property was ascribed to the anneal process,resulting a stable crystal structure,indicated by XRD and Raman results of electrodes after 1000 cycles under 10 C and the longer solid-solution reaction,revealed by in-situ XRD.In addition,the optimized particle size,micro morphology and the larger BET area surface induced by the recrystallization in anneal process also contributes to its superior electrochemical property.What's more,the thin layer,which interacted LNMO-A particles with each other,induced by particles remelting in anneal process is also beneficial for its excellent electrochemical property.This study not only improved the electrochemical properties by anneal process,but also revealed the origins and mechanisms for its improvement.展开更多
Glacier mass balance, the difference between accumulation and ablation at the glacier surface, is the direct reflection of the local climate regime. Under global warming, the simulation of glacier mass balance at the ...Glacier mass balance, the difference between accumulation and ablation at the glacier surface, is the direct reflection of the local climate regime. Under global warming, the simulation of glacier mass balance at the regional scale has attracted increasing interests. This study selects Urumqi Glacier No. 1 as the testbed for examining the transferability in space and time of two commonly used glacier mass balance simulation models: i.e., the Degree-Day Model(DDM) and the simplified Energy Balance Model(s EBM). Four experiments were carried out for assessing both models’ temporal and spatial transferability. The results show that the spatial transferability of both the DDM and s EBM is strong, whereas the temporal transferability of the DDM is relatively weak. For all four experiments, the overall simulation effect of the s EBM is better than that of the DDM. At the zone around Equilibrium Line Altitude(ELA), the DDM performed better than the s EBM.Also, the accuracy of parameters, including the lapse rate of air temperature and vertical gradient of precipitation at the glacier surface, is of great significance for improving the spatial transferability of both models.展开更多
Adaptor signature,a new primitive that alleviates the scalability issue of blockchain to some extent,has been widely adopted in the off-chain payment channel and atomic swap.As an extension of standard digital signatu...Adaptor signature,a new primitive that alleviates the scalability issue of blockchain to some extent,has been widely adopted in the off-chain payment channel and atomic swap.As an extension of standard digital signature,adaptor signature can bind the release of a complete digital signature with the exchange of a secret value.Existing constructions of adaptor signatures are mainly based on Schnorr or ECDSA signature algorithms,which suffer low signing efficiency and long signature length.In this paper,to address these issues,we propose a new construction of adaptor signature using randomized EdDSA,which has Schnorr-like structure with higher signing efficiency and shorter signature length.We prove the required security properties,including unforgeability,witness extractability and pre-signature adaptability,of the new adaptor signature scheme in the random oracle model.We conduct a comparative analysis with an ECDSA-based adaptor signature scheme to demonstrate the effectiveness and feasibility of our new proposal.展开更多
Based on China's high-resolution satellite imagery series(2 m resolution),the Chinese Glacier Inventory of Xinjiang in 2020(CGI-XJ2020)was compiled,with 2020 as the baseline year.CGI-XJ2020 has five key features:1...Based on China's high-resolution satellite imagery series(2 m resolution),the Chinese Glacier Inventory of Xinjiang in 2020(CGI-XJ2020)was compiled,with 2020 as the baseline year.CGI-XJ2020 has five key features:1)improved accuracy in glacier boundary delineation and optimized inventory attributes through highresolution satellite imagery and field validation of 38 glaciers;2)established an area-volume formula for Xinjiang glaciers using ground-penetrating radar(GPR)thickness data from 23 glaciers in the study region;3)the use of high-resolution satellite imagery has reduced the minimum glacier area threshold,enabling the identification of more small glaciers;4)enhanced accuracy in delineating supraglacial debris coverage;5)upgraded administrative division from prefecture-level(CGI-2)to county-level.According to CGI-XJ2020 data,Xinjiang contains 24,202 glaciers in 2020,covering 23,629.28 km^(2)with an average size of 0.98 km^(2)per glacier and a total ice volume of 1,608.94 km^(3).Among these,1,612 debris-covered glaciers occupy 1,163.32 km^(2)(4.9%of the total glacierized area).Glaciers larger than 10 km^(2)(296 in total)cover 9,881.69 km^(2)with a volume of 1,053.17 km^(3),accounting for 41.82%of total area and 65.46%of total ice volume,respectively.The Kunlun Mountains host the most glaciers,followed by the Tianshan Mountains.The Tarim river basin contains the largest concentration(15,860 glaciers,18,594.24 km^(2),1,347.17 km^(3)).The Hotan Prefecture has the highest glacier density.展开更多
The adsorption technology has been widely applied in water remediation for contamination removal of dyes and bacteria,by virtue of the advantages of adsorption technology including high efficiency,energy conservation ...The adsorption technology has been widely applied in water remediation for contamination removal of dyes and bacteria,by virtue of the advantages of adsorption technology including high efficiency,energy conservation and ease of operation.Simultaneous removal of dyes and bacteria has been realized by some reported materials,but to achieve satisfactory adsorption amounts and rates remain an unmet goal for decades.Herein,a poly(methacrylatoethyl trimethyl ammonium chloride-co-methyl methacrylate)copolymer was synthesized,and then blended with polyethersulfone for the fabrication of nanofibrous membranes via electrospinning for the use of fast and massive removal of dyes and bacteria.Owing to the introduction of abundant quaternary ammonium groups,the maximum adsorption amount for methyl orange was up to 909.8 mg g^(-1).In addition,the modified nanofibrous membranes showed good recyclability,broad applications in severe environments,selective adsorption ability,and excellent dynamic removal performance.Especially,thanks to the abundant functional groups,the membranes showed fast adsorption ability for bacteria through electrostatic interaction.It should be noted that the clearance ratio for Staphylococcus aureus or Escherichia coli by 6 min of static adsorption could reach 93%or 90%for each.Additionally,dynamic removal ratio via filtration with the nanofibrous membranes could reach 99.7%for Staphylococcus aureus or 98.7%for Escherichia coli in 90 s.Therefore,the proposed approach towards the quaternary ammonium modified polyethersulfone nanofibrous membranes creates a new route for ultra-high adsorption capacity and ultra-fast removal rates for dyes and bacteria in water remediation.展开更多
An excellent organolead halide perovskite film is important for the good performance of perovskite solar cells(PSCs).However,defects in perovskite crystals can affect the photovoltaic properties and stability of solar...An excellent organolead halide perovskite film is important for the good performance of perovskite solar cells(PSCs).However,defects in perovskite crystals can affect the photovoltaic properties and stability of solar cells.To solve this problem,this study incorporated a complex of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)into the CH_(3)NH_(3)Pb I_(3)active layer.The effects of different doping concentrations of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)on the performance and stability of PSCs were analyzed.Results showed that doping appropriate incorporation concentrations of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)in CH_(3)NH_(3)Pb I_(3)can improve the performance of the prepared solar cells.In specific,Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)can effectively passivate the defects in perovskite crystals,thereby suppressing the charge recombination in PSCs and promoting the charge extraction at the TiO_(2)/perovskite interface.Due to the reduction of perovskite crystal defects and the enhancement of compactness of the Cd S:Cd(SCN_(2)H4)_(2)Cl_(2):CH_(3)NH_(3)Pb I_(3)composite film,the stability of PSCs is significantly improved.展开更多
The determination of total glacial volume is important for the observation of climatic change and its consequences such as global sea-level rise. The tongue area of Glacier No. 4 of Sigong River over Mt. Bogda, easter...The determination of total glacial volume is important for the observation of climatic change and its consequences such as global sea-level rise. The tongue area of Glacier No. 4 of Sigong River over Mt. Bogda, eastern Tianshan was surveyed by ground-penetrating radar （GPR） and real time kinematic （RTK）-global positioning system （GPS） during the summer campaign 2009. In order to calculate the glacier volume, both co-kriging algorithm and estimation based on the theory of perfectly plastic material were employed. Results indicated that the ice-thickness distribution of the investigated glacier ranges from 0 to 105.0 m, with the mean thickness of 27.6 m in 2009. The corresponding ice volume was -0.076 km3 （-0.068 km3 water equivalent）. The bedrock topography shows more undulating than the glacier surface. The difference of the calculated ice volume in this study and the estimated value from the empirical formula is large. Therefore, it is urgent to validate the applicability of the ex- isting empirical formula.展开更多
Ribosomes are abundant,large RNA-protein complexes that are the sites of all protein synthesis in cells.Defects in ribosomal proteins(RPs),including proteoforms arising from genetic variations,alternative splicing of ...Ribosomes are abundant,large RNA-protein complexes that are the sites of all protein synthesis in cells.Defects in ribosomal proteins(RPs),including proteoforms arising from genetic variations,alternative splicing of RNA transcripts,post-translational modifications and alterations of protein expression level,have been linked to a diverse range of diseases,including cancer and aging.Comprehensive characterization of ribosomal proteoforms is challenging but important for the discovery of potential disease biomarkers or protein targets.In the present work,using E.coli 70S RPs as an example,we first developed a top-down proteomics approach on a Waters Synapt G2 Si mass spectrometry(MS)system,and then applied it to the HeLa 80S ribosome.The results were complemented by a bottom-up approach.In total,50 out of 55 RPs were identified using the top-down approach.Among these,more than 30 RPs were found to have their N-terminal methionine removed.Additional modifications such as methylation,acetylation,and hydroxylation were also observed,and the modification sites were identified by bottomup MS.In a HeLa 80S ribosomal sample,we identified 98 ribosomal proteoforms,among which multiple truncated 80S ribosomal proteoforms were observed,the type of information which is often overlooked by bottom-up experiments.Although their relevance to diseases is not yet known,the integration of topdown and bottom-up proteomics approaches paves the way for the discovery of proteoform-specific disease biomarkers or targets.展开更多
The cloud computing technology has emerged,developed,and matured in recent years,consequently commercializing remote outsourcing storage services.An increasing number of companies and individuals have chosen the cloud...The cloud computing technology has emerged,developed,and matured in recent years,consequently commercializing remote outsourcing storage services.An increasing number of companies and individuals have chosen the cloud to store their data.However,accidents,such as cloud server downtime,cloud data loss,and accidental deletion,are serious issues for some applications that need to run around the clock.For some mission and business-critical applications,the continuous availability of outsourcing storage services is also necessary to protect users'outsourced data during downtime.Nevertheless,ensuring the continuous availability of data in public cloud data integrity auditing protocols leads to data privacy issues because auditors can obtain the data content of users by a sufficient number of storage proofs.Therefore,protecting data privacy is a burning issue.In addition,existing data integrity auditing schemes that rely on semi-trusted third-party auditors have several security problems,including single points of failure and performance bottlenecks.To deal with these issues,we propose herein a blockchain-based continuous data integrity checking protocol with zero-knowledge privacy protection.We realize a concrete construction by using a verifiable delay function with high efficiency and proof of retrievability,and prove the security of the proposal in a random oracle model.The proposed construction supports dynamic updates for the outsourced data.We also design smart contracts to ensure fairness among the parties involved.Finally,we implement the protocols,and the experimental results demonstrate the efficiency of the proposed protocol.展开更多
Worldwide examination of glacier change is based on detailed observations from only a small number of glaciers.The ground-based detailed individual glacier monitoring is of strong need and extremely important in both ...Worldwide examination of glacier change is based on detailed observations from only a small number of glaciers.The ground-based detailed individual glacier monitoring is of strong need and extremely important in both regional and global scales.A long-term integrated multi-level monitoring has been carried out on Urumqi Glacier No.1(UG1)at the headwaters of the Urumqi River in the eastern Tianshan Mountains of Central Asia since 1959 by the Tianshan Glaciological Station,Chinese Acamedey of Sciences(CAS),and the glaciological datasets promise to be the best in China.The boundaries of all glacier zones moved up,resulting in a shrunk accumulation area.The stratigraphy features of the snowpack on the glacier were found to be significantly altered by climate warming.Mass balances of UG1 show accelerated mass loss since 1960,which were attributed to three mechanisms.The glacier has been contracting at an accelerated rate since 1962,resulting in a total reduction of 0.37 km2 or 19.3%from 1962 to 2018.Glacier runoff measured at the UG1 hydrometeorological station demonstrates a significant increase from 1959 to 2018 with a large interannual fluctuation,which is inversely correlated with the glacier's mass balance.This study analyzes on the changes in glacier zones,mass balance,area and length,and streamflow in the nival glacial catchment over the past 60 years.It provides critical insight into the processes and mechanisms of glacier recession in response to climate change.The results are not only representative of those glaciers in the Tianshan mountains,but also for the continental-type throughout the world.The direct observation data form an essential basis for evaluating mountain glacier changes and the impact of glacier shrinkage on water resources in the interior drainage rivers within the vast arid and semi-arid land in northwestern China as well as Central Asia.展开更多
Soil nitrification is mediated by ammonia-oxidizing archaea (AOA) and bacteria (AOB), which occupy different specialized ecological niches. However, little is known about the diversification of AOA and AOB communities...Soil nitrification is mediated by ammonia-oxidizing archaea (AOA) and bacteria (AOB), which occupy different specialized ecological niches. However, little is known about the diversification of AOA and AOB communities in a large geographical scale. Here, eight paddy soils collected from different geographic regions in China were selected to investigate the spatial distribution of AOA and AOB, and their potential nitrification activity (PNA). The result showed that the abundance of AOA was predominant over AOB, indicating that the rice fields favor the growth of AOA. PNA highly varied from 0.43 to 3.57 μg NOX-N·g·dry·soil·h-1, and was positively related with soil NH3 content, the abundance of AOA community, and negatively related with the diversity of AOB community (P amoA genes revealed remarkable differences in the compositions of AOA and AOB community. Phylogenetic analyses of amoA genes showed that Nitrosospiracluster-3-like and Nitrosomonas cluster 7-like AOB extensively dominated the AOB communities, and 54d9-like AOA within the soil group 1.1b predominated in AOA communities in paddy soils. Redundancy analysis suggested that the spatial variations of AOA community structure were influenced by soil TN content (P < 0.01), while no significant correlation between AOB community structure and soil properties was found. Findings highlight that ammonia oxidizers exhibit spatial variations in complex paddy fields due to the joint influence of soil variables associated with N availability.展开更多
Monero uses ring signatures to protect users’privacy.However,Monero’s anonymity covers various illicit activities,such as money laundering,as it becomes difficult to identify and punish malicious users.Therefore,it ...Monero uses ring signatures to protect users’privacy.However,Monero’s anonymity covers various illicit activities,such as money laundering,as it becomes difficult to identify and punish malicious users.Therefore,it is necessary to regulate illegal transactions while protecting the privacy of legal users.We present a revocable linkable ring signature scheme(RLRS),which balances the privacy and supervision for privacy-preserving blockchain transactions.By setting the role of revocation authority,we can trace the malicious user and revoke it in time.We define the security model of the revocable linkable ring signature and give the concrete construction of RLRS.We employ accumulator and ElGamal encryption to achieve the functionalities of revocation and tracing.In addition,we compress the ring signature size to the logarithmic level by using non-interactive sum arguments of knowledge(NISA).Then,we prove the security of RLRS,which satisfies anonymity,unforgeability,linkability,and non-frameability.Lastly,we compare RLRS with other ring signature schemes.RLRS is linkable,traceable,and revocable with logarithmic communication complexity and less computational overhead.We also implement RLRS scheme and the results show that its verification time is 1.5s with 500 ring members.展开更多
Accurately predicting the estimated ultimate recovery(EUR)of shale gas wells is key to formulating a shale gas reservoir development plan.However,in practice,determining the EUR remains challenging due to the complex ...Accurately predicting the estimated ultimate recovery(EUR)of shale gas wells is key to formulating a shale gas reservoir development plan.However,in practice,determining the EUR remains challenging due to the complex dynamic characteristics of shale gas production,which first decreases rapidly and then slowly.In this study,based on material balance theory and equivalent seepage resistance theory and considering crucial factors including primary water,adsorption,and pore effects,a new production model for fractured horizontal shale gas wells is developed.The calculation process is designed by using Newton's iterative method.The shale gas well EUR prediction method is verified,and the factors influencing the EUR are analyzed.The results show that adsorption has a significant effect on production,especially on the Langmuir volume.Moreover,ignoring the influence of primary water,which exists in shale gas reservoirs in the form of bound water,results in an overestimation of the EUR.Furthermore,production positively correlates with the fracture half-length and the number of fractures,but the action mechanisms of these two factors differ.Unlike the number of fractures,which predominantly affects the initial stage of production,the fracture half-length has a more nuanced role.It is capable of altering the stimulated reservoir volume zone,thereby exerting influence over the entire production life cycle.展开更多
With the emergence of illegal behaviors such as money laundering and extortion,the regulation of privacy-preserving cryptocurrency has become increasingly important.However,existing regulated privacy-preserving crypto...With the emergence of illegal behaviors such as money laundering and extortion,the regulation of privacy-preserving cryptocurrency has become increasingly important.However,existing regulated privacy-preserving cryptocurrencies usually rely on a single regulator,which seriously threatens users’privacy once the regulator is corrupt.To address this issue,we propose a linkable group signature against malicious regulators(ALGS)for regulated privacy-preserving cryptocurrencies.Specifically,a set of regulators work together to regulate users’behavior during cryptocurrencies transactions.Even if a certain number of regulators are corrupted,our scheme still ensures the identity security of a legal user.Meanwhile,our scheme can prevent double-spending during cryptocurrency transactions.We first propose the model of ALGS and define its security properties.Then,we present a concrete construction of ALGS,which provides CCA-2 anonymity,traceability,non-frameability,and linkability.We finally evaluate our ALGS scheme and report its advantages by comparing other schemes.The implementation result shows that the runtime of our signature algorithm is reduced by 17%compared to Emura et al.(2017)and 49%compared to KSS19(Krenn et al.2019),while the verification time is reduced by 31%compared to Emura et al.and 47%compared to KSS19.展开更多
Chinese Elaeagnus angustifolia(EA)is a homologous food and medicine that is rich in bioactive substances,and most EA is currently treated as an abandoned resource.In this study,various lactic acid bacteria(LAB)were us...Chinese Elaeagnus angustifolia(EA)is a homologous food and medicine that is rich in bioactive substances,and most EA is currently treated as an abandoned resource.In this study,various lactic acid bacteria(LAB)were used to ferment EA juice to improve its content of bioactive compounds and the aroma profile to develop a nutritious and acceptable EA beverage.The growth characteristics,total phenolic content,total flavonoid content,anti-oxidant activity,and aroma profiles of the EA juice after fermentation by pure and mixed LAB were measured.The results of pure LAB fermentation showed that Lactobacillus rhamnosus(BL)had strong adaptability in EA juice,and Lactobacillus fermentium(BF)had the greatest ability to improve its probiotic function.1-nonanol,3-buten-1-ol,3-methyl-,2-tridecanone,pentanoic acid,and 10-octadecenal could be the typical aroma substances of coculture-fermented EA juice.This is the first study in which EA processing by LAB fermentation has been investigated.The results proved that the fermentation of EA by mixed BL and BF could be a promising method for the high-value utilization of EA.展开更多
A facile and low-cost method to prepare periodic Au@metal-organic framework （MOF） （MIL-100（Fe）） nanoparticle arrays was developed. The arrays were fabricated in situ using monolayer colloidal crystals as templat...A facile and low-cost method to prepare periodic Au@metal-organic framework （MOF） （MIL-100（Fe）） nanoparticle arrays was developed. The arrays were fabricated in situ using monolayer colloidal crystals as templates, followed by Au deposition on substrates, and annealing. MIL-100（Fe） coatings were applied on the nanospheres using a simple solvent thermal process. The prepared periodic Au@MIL-100（Fe） nanoparticle （NP） arrays were characterized by two peaks in the visible spectra. The first peak represented the surface plasmon resonance （SPR） of the Au nanospheres, and the other peak, or the diffraction peak originated from the periodic structure in the NP array. After modification with 3-aminophenylboronic acid hemisulfate （PBA）, the Au@MIL-100（Fe） NP arrays exhibited sensitive responses to different glucose concentrations with good selectivity. These responses could be due to the strong interaction between PBA and glucose molecules. The diffraction peak was sensitive at low glucose concentrations （less than 12 mM）, whereas the SPR peak rapidly responded at high concentrations. The peaks thus demonstrated satisfactory complementary sensitivity for glucose detection in different concentration regions. These results can be used to develop a dual-channel biosensor. We also created a standard diagram, which can be used to efficiently monitor blood glucose levels. The proposed strategy can be extended to develop different dual-channel sensors using Au@MIL-100（Fe） NP arrays agents. functionalized with different recognition展开更多
基金Project supported by the Natural Science Foundation of Hebei Province(B2023201108,B2024201076)Science Fund for Creative Research Groups of Natural Science Foundation of Hebei Province(B2021201038)+3 种基金333 Talent Project Fund of Hebei Province(C20221015)National High-End Foreign Expert Recruitment Plan(G2022003007L)Hebei Province Higher Education Science and Technology Research Project(JZX2023001)Hebei Province Innovation Capability Enhancement Plan Project(22567632H)。
文摘Lead-free double perovskites have gained recognition as top luminescent materials due to their environmental friendliness,high chemical stability,structural adjustability,and excellent photoelectric properties.However,the poor modulation of emission restricts their applications,and it is highly desirable to explore stable and efficient double perovskites with multimode luminescence and adjustable spectra for multifunctional photoelectric applications.Herein,the rare earth ions Ln^(3+)(Er^(3+)and Ho^(3+))-doped Cs_(2)NaYCl_(6):Sb^(3+)crystals were synthesized by a simple solvothermal route.The X-ray diffraction pattern(XRD),energy-dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS),and elemental mapping images demonstrate that the Sb^(3+),Er^(3+),and Ho^(3+)ions have been homogeneously incorporated into the Cs_(2)NaYCl_(6)crystals.As anticipated,the emissio n spectra of Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)are composed of two bands.One broad blue band derives from self-trapped exciton(STE)in[SbCl_(6)]3-octahedra while another group of emission peaks stems from the f-f transitions of Ln^(3+)ions.The emission colors of Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)phosphors can be tuned in a wide range by modulating the doping concentrations of Ln^(3+)ions.The efficient energy transfer from STE to Ln^(3+)is the key point to achieving the efficient and tunable emissions Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)samples.Interestingly,Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)can also exhibit characteristic up-conversion luminescence of Ln^(3+)under nearinfrared(NIR)excitation besides the down-conversion luminescence,revealing that the materials may have potential applicability in multimode anti-counterfeiting and information encryption applications.Furthermore,the light emitting diodes(LEDs)assembled by Cs_(2)NaYCl_(6):Sb^(3+)and Cs_(2)NaYCl_(6):Sb^(3+)/Ln^(3+)phosphors display dazzling blue,green,and red emissions under a forward bias current,which indicates that the as-obtained double perovskites materials may have great potential in solid-state lighting and optoelectronic devices.
基金supported by the National Key Research and Development Program,China(2018YFD0900406)the National Natural Science Foundation,China(31802291)the Natural Science Foundation of Hunan Province(2021JJ40342)。
文摘Recently,cilia defects have been proposed to contribute to scoliosis.Here,we demonstrate that coiled-coil domain-containing 57(Ccdc57)plays an essential role in straightening the body axis of zebrafish by regulating ciliary beating in the brain ventricle(BV).Zygotic ccdc57(Zccdc57)mutant zebrafish developes scoliosis without significant changes in their bone density and calcification,and the maternal-zygotic ccdc57(MZccdc57)mutant embryos display curved bodies since the long-pec stage.The expression of ccdc57 is enriched in ciliated tissues and immunofluorescence analysis reveals colocalization of Ccdc57-HA with acetylated a-tubulin,implicating it in having a role in ciliary function.Further examination reveals that it is the coordinated cilia beating of multiple cilia bundles(MCB)in the MZccdc57 mutant embryos that is affected at 48 hours post fertilization,when the compromised cerebrospinal fluid flow and curved body axis have already occurred.Either ccdc57 m RNA injection or epinephrine treatment reverses the spinal curvature in MZccdc57 mutant larvae from ventrally curly to straight or even dorsally curly and significantly upregulates urotensin signaling.This study reveals the role of ccdc57 in maintaining coordinated cilia beating of MCB in the BV.
基金Natural Science Foundation of Shandong Province(ZR2018MEM017)。
文摘The spinel LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)has been attracted great attention as lithium ion cathode material due to its high voltage and large energy density.However,the practical application of LNMO is still limited by poor cycling stability.Herein,to improve the cycling stability of spinel LNMO,it was treated with anneal process at 900℃for 2 h after prepared by traditional solid-state method(LNMO-A).LNMO-A sample presented better electrochemical property especially under high rate,with capacity of 91.2 mAhg^(-1)after 1000 cycles under 10 C.Its superior electrochemical property was ascribed to the anneal process,resulting a stable crystal structure,indicated by XRD and Raman results of electrodes after 1000 cycles under 10 C and the longer solid-solution reaction,revealed by in-situ XRD.In addition,the optimized particle size,micro morphology and the larger BET area surface induced by the recrystallization in anneal process also contributes to its superior electrochemical property.What's more,the thin layer,which interacted LNMO-A particles with each other,induced by particles remelting in anneal process is also beneficial for its excellent electrochemical property.This study not only improved the electrochemical properties by anneal process,but also revealed the origins and mechanisms for its improvement.
基金supported by the Key Research Program of Frontier Sciences of Chinese Academy of Sciences(Grant No.QYZDB-SSW-SYS024)National Natural Science Foundation of China(Grant Nos.41771081 and 41761134093).
文摘Glacier mass balance, the difference between accumulation and ablation at the glacier surface, is the direct reflection of the local climate regime. Under global warming, the simulation of glacier mass balance at the regional scale has attracted increasing interests. This study selects Urumqi Glacier No. 1 as the testbed for examining the transferability in space and time of two commonly used glacier mass balance simulation models: i.e., the Degree-Day Model(DDM) and the simplified Energy Balance Model(s EBM). Four experiments were carried out for assessing both models’ temporal and spatial transferability. The results show that the spatial transferability of both the DDM and s EBM is strong, whereas the temporal transferability of the DDM is relatively weak. For all four experiments, the overall simulation effect of the s EBM is better than that of the DDM. At the zone around Equilibrium Line Altitude(ELA), the DDM performed better than the s EBM.Also, the accuracy of parameters, including the lapse rate of air temperature and vertical gradient of precipitation at the glacier surface, is of great significance for improving the spatial transferability of both models.
基金supported by the National Key R&D Program of China(2022YFB2701500)the National Natural Science Foundation of China(62272385,62311540156)+2 种基金Shaanxi Distinguished Youth Project(2022JC-47)the Key Research and Development Program of Shaanxi(2021ZDLGY06-04)Major Program of Shandong Provincial Natural Science Foundation for the Fundamental Research(ZR2022ZD03).
文摘Adaptor signature,a new primitive that alleviates the scalability issue of blockchain to some extent,has been widely adopted in the off-chain payment channel and atomic swap.As an extension of standard digital signature,adaptor signature can bind the release of a complete digital signature with the exchange of a secret value.Existing constructions of adaptor signatures are mainly based on Schnorr or ECDSA signature algorithms,which suffer low signing efficiency and long signature length.In this paper,to address these issues,we propose a new construction of adaptor signature using randomized EdDSA,which has Schnorr-like structure with higher signing efficiency and shorter signature length.We prove the required security properties,including unforgeability,witness extractability and pre-signature adaptability,of the new adaptor signature scheme in the random oracle model.We conduct a comparative analysis with an ECDSA-based adaptor signature scheme to demonstrate the effectiveness and feasibility of our new proposal.
基金supported by the Third Xinjiang Scientific Expedition Program(Grant No.2022xjkk0101)the Second Qinghai-Tibet Scientific Expedition Program(Grant No.2019QZKK0201).
文摘Based on China's high-resolution satellite imagery series(2 m resolution),the Chinese Glacier Inventory of Xinjiang in 2020(CGI-XJ2020)was compiled,with 2020 as the baseline year.CGI-XJ2020 has five key features:1)improved accuracy in glacier boundary delineation and optimized inventory attributes through highresolution satellite imagery and field validation of 38 glaciers;2)established an area-volume formula for Xinjiang glaciers using ground-penetrating radar(GPR)thickness data from 23 glaciers in the study region;3)the use of high-resolution satellite imagery has reduced the minimum glacier area threshold,enabling the identification of more small glaciers;4)enhanced accuracy in delineating supraglacial debris coverage;5)upgraded administrative division from prefecture-level(CGI-2)to county-level.According to CGI-XJ2020 data,Xinjiang contains 24,202 glaciers in 2020,covering 23,629.28 km^(2)with an average size of 0.98 km^(2)per glacier and a total ice volume of 1,608.94 km^(3).Among these,1,612 debris-covered glaciers occupy 1,163.32 km^(2)(4.9%of the total glacierized area).Glaciers larger than 10 km^(2)(296 in total)cover 9,881.69 km^(2)with a volume of 1,053.17 km^(3),accounting for 41.82%of total area and 65.46%of total ice volume,respectively.The Kunlun Mountains host the most glaciers,followed by the Tianshan Mountains.The Tarim river basin contains the largest concentration(15,860 glaciers,18,594.24 km^(2),1,347.17 km^(3)).The Hotan Prefecture has the highest glacier density.
基金the National Natural Science Foundation of China(Nos.51773127,51873115,51803131 and 51803134)the State Key Research Development Programme of China(Nos.2016YFC1103000 and 2018YFC1106400)the Science and Technology Program of Sichuan Province(Nos.2017SZ0011 and 2019YJ0132)。
文摘The adsorption technology has been widely applied in water remediation for contamination removal of dyes and bacteria,by virtue of the advantages of adsorption technology including high efficiency,energy conservation and ease of operation.Simultaneous removal of dyes and bacteria has been realized by some reported materials,but to achieve satisfactory adsorption amounts and rates remain an unmet goal for decades.Herein,a poly(methacrylatoethyl trimethyl ammonium chloride-co-methyl methacrylate)copolymer was synthesized,and then blended with polyethersulfone for the fabrication of nanofibrous membranes via electrospinning for the use of fast and massive removal of dyes and bacteria.Owing to the introduction of abundant quaternary ammonium groups,the maximum adsorption amount for methyl orange was up to 909.8 mg g^(-1).In addition,the modified nanofibrous membranes showed good recyclability,broad applications in severe environments,selective adsorption ability,and excellent dynamic removal performance.Especially,thanks to the abundant functional groups,the membranes showed fast adsorption ability for bacteria through electrostatic interaction.It should be noted that the clearance ratio for Staphylococcus aureus or Escherichia coli by 6 min of static adsorption could reach 93%or 90%for each.Additionally,dynamic removal ratio via filtration with the nanofibrous membranes could reach 99.7%for Staphylococcus aureus or 98.7%for Escherichia coli in 90 s.Therefore,the proposed approach towards the quaternary ammonium modified polyethersulfone nanofibrous membranes creates a new route for ultra-high adsorption capacity and ultra-fast removal rates for dyes and bacteria in water remediation.
基金financially supported by the National Science Foundation for Young Scientists of China(No.61704048)the Program for Science&Technology Innovation Talents in Universities of Henan Province,China(No.19HASTIT049)+1 种基金the Key Research Project of Henan Provincial Higher Education,China(No.19A140007)the Natural Science Foundation for Young Scientists of Henan Province,China(No.202300410060)。
文摘An excellent organolead halide perovskite film is important for the good performance of perovskite solar cells(PSCs).However,defects in perovskite crystals can affect the photovoltaic properties and stability of solar cells.To solve this problem,this study incorporated a complex of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)into the CH_(3)NH_(3)Pb I_(3)active layer.The effects of different doping concentrations of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)on the performance and stability of PSCs were analyzed.Results showed that doping appropriate incorporation concentrations of Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)in CH_(3)NH_(3)Pb I_(3)can improve the performance of the prepared solar cells.In specific,Cd S and Cd(SCN_(2)H_(4))_(2)Cl_(2)can effectively passivate the defects in perovskite crystals,thereby suppressing the charge recombination in PSCs and promoting the charge extraction at the TiO_(2)/perovskite interface.Due to the reduction of perovskite crystal defects and the enhancement of compactness of the Cd S:Cd(SCN_(2)H4)_(2)Cl_(2):CH_(3)NH_(3)Pb I_(3)composite film,the stability of PSCs is significantly improved.
基金supported by the Funds for Creative Research Groups of China (No. 41121001)the National Natural Science Foundation of China (Nos. 41301069, 91025012 and 41101066)+1 种基金the SKLCS founding (Nos. SKLCS-ZZ-2012-01-01, SKLCS-ZZ-2012-01-09)the West Light Program for Talent Cultivation of Chinese Academy of Sciences
文摘The determination of total glacial volume is important for the observation of climatic change and its consequences such as global sea-level rise. The tongue area of Glacier No. 4 of Sigong River over Mt. Bogda, eastern Tianshan was surveyed by ground-penetrating radar （GPR） and real time kinematic （RTK）-global positioning system （GPS） during the summer campaign 2009. In order to calculate the glacier volume, both co-kriging algorithm and estimation based on the theory of perfectly plastic material were employed. Results indicated that the ice-thickness distribution of the investigated glacier ranges from 0 to 105.0 m, with the mean thickness of 27.6 m in 2009. The corresponding ice volume was -0.076 km3 （-0.068 km3 water equivalent）. The bedrock topography shows more undulating than the glacier surface. The difference of the calculated ice volume in this study and the estimated value from the empirical formula is large. Therefore, it is urgent to validate the applicability of the ex- isting empirical formula.
基金supported in part by the National Natural Science Foundation of China(Grant Nos.:91953102 and 81872836)Natural Science Foundation of Guangdong Province,China(Grant Nos.:2019A1515011265 and 2022A1515010965)+1 种基金the Fundamental Research Funds for Sun Yat-sen University,China(Grant No.:19ykzd26)Open Project Funding of the State Key Laboratory of Crop Stress Adaptation and Improvement(Grant No.:2020KF05).Huilin Li would like to thank the Pearl River Talent Recruitment Program for support.
文摘Ribosomes are abundant,large RNA-protein complexes that are the sites of all protein synthesis in cells.Defects in ribosomal proteins(RPs),including proteoforms arising from genetic variations,alternative splicing of RNA transcripts,post-translational modifications and alterations of protein expression level,have been linked to a diverse range of diseases,including cancer and aging.Comprehensive characterization of ribosomal proteoforms is challenging but important for the discovery of potential disease biomarkers or protein targets.In the present work,using E.coli 70S RPs as an example,we first developed a top-down proteomics approach on a Waters Synapt G2 Si mass spectrometry(MS)system,and then applied it to the HeLa 80S ribosome.The results were complemented by a bottom-up approach.In total,50 out of 55 RPs were identified using the top-down approach.Among these,more than 30 RPs were found to have their N-terminal methionine removed.Additional modifications such as methylation,acetylation,and hydroxylation were also observed,and the modification sites were identified by bottomup MS.In a HeLa 80S ribosomal sample,we identified 98 ribosomal proteoforms,among which multiple truncated 80S ribosomal proteoforms were observed,the type of information which is often overlooked by bottom-up experiments.Although their relevance to diseases is not yet known,the integration of topdown and bottom-up proteomics approaches paves the way for the discovery of proteoform-specific disease biomarkers or targets.
基金This work is supported by the National Natural Science Foundation of China(61872229,U19B2021)the Shaanxi Provincial Science Fund for Distinguished Young Scholars(2022JC-47)+1 种基金the Blockchain Core Technology Strategic Research Program of Ministry of Education of China(2020KJ010301)the Key Research and Development Program of Shaanxi(2021ZDLGY06-04,2020ZDLGY09-06).
文摘The cloud computing technology has emerged,developed,and matured in recent years,consequently commercializing remote outsourcing storage services.An increasing number of companies and individuals have chosen the cloud to store their data.However,accidents,such as cloud server downtime,cloud data loss,and accidental deletion,are serious issues for some applications that need to run around the clock.For some mission and business-critical applications,the continuous availability of outsourcing storage services is also necessary to protect users'outsourced data during downtime.Nevertheless,ensuring the continuous availability of data in public cloud data integrity auditing protocols leads to data privacy issues because auditors can obtain the data content of users by a sufficient number of storage proofs.Therefore,protecting data privacy is a burning issue.In addition,existing data integrity auditing schemes that rely on semi-trusted third-party auditors have several security problems,including single points of failure and performance bottlenecks.To deal with these issues,we propose herein a blockchain-based continuous data integrity checking protocol with zero-knowledge privacy protection.We realize a concrete construction by using a verifiable delay function with high efficiency and proof of retrievability,and prove the security of the proposal in a random oracle model.The proposed construction supports dynamic updates for the outsourced data.We also design smart contracts to ensure fairness among the parties involved.Finally,we implement the protocols,and the experimental results demonstrate the efficiency of the proposed protocol.
基金This research was funded by the National Natural Science Foundation of China(Grant No.41761134093)the Second Tibetan Plateau Scientific Expedition and Research(Grant No.2019QZKK0201)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Class A)(Grant Nos.XDA20060201 and XDA20020102)and the State Key Laboratory of Cryospheric Sciences Open Research Fund(Grant No.SKLCS-ZZ-2020).
文摘Worldwide examination of glacier change is based on detailed observations from only a small number of glaciers.The ground-based detailed individual glacier monitoring is of strong need and extremely important in both regional and global scales.A long-term integrated multi-level monitoring has been carried out on Urumqi Glacier No.1(UG1)at the headwaters of the Urumqi River in the eastern Tianshan Mountains of Central Asia since 1959 by the Tianshan Glaciological Station,Chinese Acamedey of Sciences(CAS),and the glaciological datasets promise to be the best in China.The boundaries of all glacier zones moved up,resulting in a shrunk accumulation area.The stratigraphy features of the snowpack on the glacier were found to be significantly altered by climate warming.Mass balances of UG1 show accelerated mass loss since 1960,which were attributed to three mechanisms.The glacier has been contracting at an accelerated rate since 1962,resulting in a total reduction of 0.37 km2 or 19.3%from 1962 to 2018.Glacier runoff measured at the UG1 hydrometeorological station demonstrates a significant increase from 1959 to 2018 with a large interannual fluctuation,which is inversely correlated with the glacier's mass balance.This study analyzes on the changes in glacier zones,mass balance,area and length,and streamflow in the nival glacial catchment over the past 60 years.It provides critical insight into the processes and mechanisms of glacier recession in response to climate change.The results are not only representative of those glaciers in the Tianshan mountains,but also for the continental-type throughout the world.The direct observation data form an essential basis for evaluating mountain glacier changes and the impact of glacier shrinkage on water resources in the interior drainage rivers within the vast arid and semi-arid land in northwestern China as well as Central Asia.
文摘Soil nitrification is mediated by ammonia-oxidizing archaea (AOA) and bacteria (AOB), which occupy different specialized ecological niches. However, little is known about the diversification of AOA and AOB communities in a large geographical scale. Here, eight paddy soils collected from different geographic regions in China were selected to investigate the spatial distribution of AOA and AOB, and their potential nitrification activity (PNA). The result showed that the abundance of AOA was predominant over AOB, indicating that the rice fields favor the growth of AOA. PNA highly varied from 0.43 to 3.57 μg NOX-N·g·dry·soil·h-1, and was positively related with soil NH3 content, the abundance of AOA community, and negatively related with the diversity of AOB community (P amoA genes revealed remarkable differences in the compositions of AOA and AOB community. Phylogenetic analyses of amoA genes showed that Nitrosospiracluster-3-like and Nitrosomonas cluster 7-like AOB extensively dominated the AOB communities, and 54d9-like AOA within the soil group 1.1b predominated in AOA communities in paddy soils. Redundancy analysis suggested that the spatial variations of AOA community structure were influenced by soil TN content (P < 0.01), while no significant correlation between AOB community structure and soil properties was found. Findings highlight that ammonia oxidizers exhibit spatial variations in complex paddy fields due to the joint influence of soil variables associated with N availability.
基金supported by the National Key R&D Program of China(2022YFB2701500)the National Natural Science Foundation of China(62272385,62202375)+4 种基金Shaanxi Distinguished Youth Project(2022JC-47)the Major Program of Shandong Provincial Natural Science Foundation for the Fundamental Research(ZR2022ZD03)the Key Research and Development Program of Shaanxi(2024GX-ZDCYL-01-09,2024GX-ZDCYL-01-15)Young Talent Fund of Association for Science and Technology in Shaanxi,China(20220134)Scientific Research Program Funded by Shaanxi Provincial Education Department,China(24JK0653).
文摘Monero uses ring signatures to protect users’privacy.However,Monero’s anonymity covers various illicit activities,such as money laundering,as it becomes difficult to identify and punish malicious users.Therefore,it is necessary to regulate illegal transactions while protecting the privacy of legal users.We present a revocable linkable ring signature scheme(RLRS),which balances the privacy and supervision for privacy-preserving blockchain transactions.By setting the role of revocation authority,we can trace the malicious user and revoke it in time.We define the security model of the revocable linkable ring signature and give the concrete construction of RLRS.We employ accumulator and ElGamal encryption to achieve the functionalities of revocation and tracing.In addition,we compress the ring signature size to the logarithmic level by using non-interactive sum arguments of knowledge(NISA).Then,we prove the security of RLRS,which satisfies anonymity,unforgeability,linkability,and non-frameability.Lastly,we compare RLRS with other ring signature schemes.RLRS is linkable,traceable,and revocable with logarithmic communication complexity and less computational overhead.We also implement RLRS scheme and the results show that its verification time is 1.5s with 500 ring members.
基金supported by the National Natural Science Foundation of China(Grant Nos.52304024,52274034,and 52204035)the Natural Science Foundation of Chongqing,China(Grant No.CSTB2023NSCQ-MSX0264)+1 种基金the Project of Science and Technology Research Program of Chongqing Municipal Education Commission,China(Grant Nos.KJQN202201517 and KJQN202001501)the Research Foundation of the Chongqing University of Science and Technology,China(Grant No.ckrc2022025).
文摘Accurately predicting the estimated ultimate recovery(EUR)of shale gas wells is key to formulating a shale gas reservoir development plan.However,in practice,determining the EUR remains challenging due to the complex dynamic characteristics of shale gas production,which first decreases rapidly and then slowly.In this study,based on material balance theory and equivalent seepage resistance theory and considering crucial factors including primary water,adsorption,and pore effects,a new production model for fractured horizontal shale gas wells is developed.The calculation process is designed by using Newton's iterative method.The shale gas well EUR prediction method is verified,and the factors influencing the EUR are analyzed.The results show that adsorption has a significant effect on production,especially on the Langmuir volume.Moreover,ignoring the influence of primary water,which exists in shale gas reservoirs in the form of bound water,results in an overestimation of the EUR.Furthermore,production positively correlates with the fracture half-length and the number of fractures,but the action mechanisms of these two factors differ.Unlike the number of fractures,which predominantly affects the initial stage of production,the fracture half-length has a more nuanced role.It is capable of altering the stimulated reservoir volume zone,thereby exerting influence over the entire production life cycle.
基金supported by the National Key R&D Program of China(2022YFB2701500)the National Natural Science Foundation of China(62272385,62202375)+4 种基金Shaanxi Distinguished Youth Project(2022JC-47)the Major Program of Shandong Provincial Natural Science Foundation for the Fundamental Research(ZR2022ZD03)the Key Research and Development Program of Shaanxi(2024GX-ZDCYL-01-09,2024GX-ZDCYL-01-15)Young Talent Fund of Association for Science and Technology in Shaanxi,China(20220134)The Youth Innovation Team of Shaanxi Universities(24JP180).
文摘With the emergence of illegal behaviors such as money laundering and extortion,the regulation of privacy-preserving cryptocurrency has become increasingly important.However,existing regulated privacy-preserving cryptocurrencies usually rely on a single regulator,which seriously threatens users’privacy once the regulator is corrupt.To address this issue,we propose a linkable group signature against malicious regulators(ALGS)for regulated privacy-preserving cryptocurrencies.Specifically,a set of regulators work together to regulate users’behavior during cryptocurrencies transactions.Even if a certain number of regulators are corrupted,our scheme still ensures the identity security of a legal user.Meanwhile,our scheme can prevent double-spending during cryptocurrency transactions.We first propose the model of ALGS and define its security properties.Then,we present a concrete construction of ALGS,which provides CCA-2 anonymity,traceability,non-frameability,and linkability.We finally evaluate our ALGS scheme and report its advantages by comparing other schemes.The implementation result shows that the runtime of our signature algorithm is reduced by 17%compared to Emura et al.(2017)and 49%compared to KSS19(Krenn et al.2019),while the verification time is reduced by 31%compared to Emura et al.and 47%compared to KSS19.
文摘Chinese Elaeagnus angustifolia(EA)is a homologous food and medicine that is rich in bioactive substances,and most EA is currently treated as an abandoned resource.In this study,various lactic acid bacteria(LAB)were used to ferment EA juice to improve its content of bioactive compounds and the aroma profile to develop a nutritious and acceptable EA beverage.The growth characteristics,total phenolic content,total flavonoid content,anti-oxidant activity,and aroma profiles of the EA juice after fermentation by pure and mixed LAB were measured.The results of pure LAB fermentation showed that Lactobacillus rhamnosus(BL)had strong adaptability in EA juice,and Lactobacillus fermentium(BF)had the greatest ability to improve its probiotic function.1-nonanol,3-buten-1-ol,3-methyl-,2-tridecanone,pentanoic acid,and 10-octadecenal could be the typical aroma substances of coculture-fermented EA juice.This is the first study in which EA processing by LAB fermentation has been investigated.The results proved that the fermentation of EA by mixed BL and BF could be a promising method for the high-value utilization of EA.
基金The authors acknowledge the financial support from the National Basic Research Program of China （No. 2012CB932303）, the National Natural Science Foundation of China （Nos. 51371165 and 51571189）, the State Key Program of National Natural Science Foundation of China （No. 51531006）, the Anhui Pro- vincial Natural Science Foundation （No. 1508085JGD07）, the Cross-disciplinary Collaborative Teams Program in CAS, and the CAS/SAFEA International Partnership Program for Creative Research Teams.
文摘A facile and low-cost method to prepare periodic Au@metal-organic framework （MOF） （MIL-100（Fe）） nanoparticle arrays was developed. The arrays were fabricated in situ using monolayer colloidal crystals as templates, followed by Au deposition on substrates, and annealing. MIL-100（Fe） coatings were applied on the nanospheres using a simple solvent thermal process. The prepared periodic Au@MIL-100（Fe） nanoparticle （NP） arrays were characterized by two peaks in the visible spectra. The first peak represented the surface plasmon resonance （SPR） of the Au nanospheres, and the other peak, or the diffraction peak originated from the periodic structure in the NP array. After modification with 3-aminophenylboronic acid hemisulfate （PBA）, the Au@MIL-100（Fe） NP arrays exhibited sensitive responses to different glucose concentrations with good selectivity. These responses could be due to the strong interaction between PBA and glucose molecules. The diffraction peak was sensitive at low glucose concentrations （less than 12 mM）, whereas the SPR peak rapidly responded at high concentrations. The peaks thus demonstrated satisfactory complementary sensitivity for glucose detection in different concentration regions. These results can be used to develop a dual-channel biosensor. We also created a standard diagram, which can be used to efficiently monitor blood glucose levels. The proposed strategy can be extended to develop different dual-channel sensors using Au@MIL-100（Fe） NP arrays agents. functionalized with different recognition
