A rapidly growing field is piezoresistive sensor for accurate respiration rate monitoring to suppress the worldwide respiratory illness.However,a large neglected issue is the sensing durability and accuracy without in...A rapidly growing field is piezoresistive sensor for accurate respiration rate monitoring to suppress the worldwide respiratory illness.However,a large neglected issue is the sensing durability and accuracy without interference since the expiratory pressure always coupled with external humidity and temperature variations,as well as mechanical motion artifacts.Herein,a robust and biodegradable piezoresistive sensor is reported that consists of heterogeneous MXene/cellulose-gelation sensing layer and Ag-based interdigital electrode,featuring customizable cylindrical interface arrangement and compact hierarchical laminated architecture for collectively regulating the piezoresistive response and mechanical robustness,thereby realizing the long-term breath-induced pressure detection.Notably,molecular dynamics simulations reveal the frequent angle inversion and reorientation of MXene/cellulose in vacuum filtration,driven by shear forces and interfacial interactions,which facilitate the establishment of hydrogen bonds and optimize the architecture design in sensing layer.The resultant sensor delivers unprecedented collection features of superior stability for off-axis deformation(0-120°,~2.8×10^(-3) A)and sensing accuracy without crosstalk(humidity 50%-100%and temperature 30-80).Besides,the sensor-embedded mask together with machine learning models is achieved to train and classify the respiration status for volunteers with different ages(average prediction accuracy~90%).It is envisioned that the customizable architecture design and sensor paradigm will shed light on the advanced stability of sustainable electronics and pave the way for the commercial application in respiratory monitory.展开更多
A new cytotoxic pyrrolidinoindoline diketopiperazine dimer, cristatumin E （1）, was isolated from the fermentation broth of the algal fungus Eurotium herbariorum HT-2 associated with the marine algae, Enteromorpha pr...A new cytotoxic pyrrolidinoindoline diketopiperazine dimer, cristatumin E （1）, was isolated from the fermentation broth of the algal fungus Eurotium herbariorum HT-2 associated with the marine algae, Enteromorpha prolifera. The structure was determined by spectroscopic analyses and Marfey＇s amino acid analysis. Cristatumin E （1） showed cytotoxicity against K562 tumor cell line and antibacterial activity against Enterobacter aerogenes and Escherichia coli with IC50 and MIC values of 8.3, 44.0 and 44.0 μmol/L, respectively.展开更多
Pafuranones A(1)and B(2),a pair of new epimeric polyketide dimers,were isolated from the fungus Paraconiothyrium sp.OUCMDZ-3316 associated with the marine algae Enteromorpha prolifera.Their structures,including absolu...Pafuranones A(1)and B(2),a pair of new epimeric polyketide dimers,were isolated from the fungus Paraconiothyrium sp.OUCMDZ-3316 associated with the marine algae Enteromorpha prolifera.Their structures,including absolute configurations,were fully elucidated based on spectroscopic analysis,calculated ECD,and chemical methods.Pafuranones A(1)and B(2)possess a rare dimeric furanone skeleton,which might be formed through a conjugate addition of the monomeric units followed by an intramolecular cyclization.展开更多
Using the operator correspondence of the real and fictious modes in the thermo entangled state representation, wesolve the quantum master equation describing the diffusion channel and obtain the Kraus operator-sum rep...Using the operator correspondence of the real and fictious modes in the thermo entangled state representation, wesolve the quantum master equation describing the diffusion channel and obtain the Kraus operator-sum representation ofits analytical solution. we find that the pure coherent states evolve into the new mixed thermal superposed states in thediffusion channel. Also, we investigate the statistical properties of the initial coherent states and their entropy evolutions inthe diffusion channel, and find that the entropy evolutions are only related to the decay time and without the amplitudes ofthe initial coherent states.展开更多
Pyro-breaker is a fast-responding and high-reliable explosive-driven circuit breaker,which has been applied in several quench protection systems,such as International Thermonuclear Experimental Reactor and Experimenta...Pyro-breaker is a fast-responding and high-reliable explosive-driven circuit breaker,which has been applied in several quench protection systems,such as International Thermonuclear Experimental Reactor and Experimental Advanced Superconducting Tokamak.As an indispensable back-up switch,Pyro-breaker guarantees the reliability and safety of the system and avoids tremendous loss when quench happens.Electrical contact,a crucial part of an electrical device greatly determines the steady current capacity of a Pyro-breaker.However,due to the complexity of the model and the deficiency knowledge of the microstate of contact areas,an accurate calculation for contact resistance is difficult to acquire.A study of electrical contact in the design of a Pyro-breaker has been presented in this paper.An engineering calculation method is verified with experiments.Parameters are fitted for the presented model,which will be a significant theoretical basis for the future designing.展开更多
(±)-Pyriindolin(1)with a rare molecular backbone formed by fusing a 2,2'-bipyridine nucleus into a spiro[furan-3,3'-indoline]skeleton,was isolated from the Streptomyces albolongus EA12432.The constitution...(±)-Pyriindolin(1)with a rare molecular backbone formed by fusing a 2,2'-bipyridine nucleus into a spiro[furan-3,3'-indoline]skeleton,was isolated from the Streptomyces albolongus EA12432.The constitution and the relative configuration of(±)-1 were determined by extensive spectroscopic analyses,^(13)C calculation and DP4+probability analysis.The absolute configurations of optically pure(+)-1 and(-)-1 which were obtained after a chiral high performance liquid chromatography(HPLC)separation were further identified by electronic circular dichroism(ECD)calculations.(+)-and(-)-Pyriindolins displayed moderate cytotoxicity against HCT-116 cell line with the half-maximal inhibitory concentration(IC_(50))values of 2.89±0.17μmol/L and 4.47±0.26μmol/L,respectively.展开更多
Correction to:Neurosci.Bull.December,2016,32(6):577–584.https://doi.org/10.1007/s12264-016-0068-z In this article,in Fig 5A,the picture of the Vector+Nogo-66 group was incorrect and should have appeared as shown below.
A chemical investigation of Streptomyces sp.GZWMJZ-662,an endophytic actinomycete isolated from Houttuynia cordata Thunb.,has yielded eleven bohemamine dimers(1-11).Notably,the newly identified dibohemamines I-O(1-7)h...A chemical investigation of Streptomyces sp.GZWMJZ-662,an endophytic actinomycete isolated from Houttuynia cordata Thunb.,has yielded eleven bohemamine dimers(1-11).Notably,the newly identified dibohemamines I-O(1-7)have not been previously reported.Their structures were elucidated through detailed spectroscopic analysis,encompassing high-resolution electrospray ionization mass,nuclear magnetic resonance,infrared radiation,ultraviolet-visible,and electronic circular dichroism spectroscopy.Dibohemamine I(1)exhibited selective cytotoxic effects against the cancer cell lines 786-O and GBC-SD among the 18 cell lines evaluated,with the half-inhibitory concentration values of 3.24±0.20 and 7.36±0.41μM,respectively.展开更多
In this paper,we propose a new non-Gaussian quantum state,termed the photon-modulated displaced thermal state(DTS).Using the operator ordering method,we obtain the normal ordering product of its density operator and t...In this paper,we propose a new non-Gaussian quantum state,termed the photon-modulated displaced thermal state(DTS).Using the operator ordering method,we obtain the normal ordering product of its density operator and then investigate its normalization,the negativity of its Wigner function and its non-Gaussianity.展开更多
The Sulige gas field is a typical low-pressure low-permeability tight sandstone gas reservoir. The reservoir has poor seepage capacity, strong heterogeneity, high mineralization of formation water and extremely scarce...The Sulige gas field is a typical low-pressure low-permeability tight sandstone gas reservoir. The reservoir has poor seepage capacity, strong heterogeneity, high mineralization of formation water and extremely scarce water resources on the site. These unfavorable factors have brought great difficulties to the on-site mining process. Now, a nano-composite green environmental protection slick water fracturing fluid system CQFR can be quickly dissolved because of the larger specific surface area, and the small molecular size makes the damage to the reservoir less than 5%, and the average drag reduction effect can reach more than 73%. It can quickly and well dissolve and maintain performance under high salinity conditions and fracturing flowback fluids. It responds well to the complex reservoir conditions on the construction site and makes the flowback fluid recyable, which greatly reduces the consumption of water resources on the construction site and effectively improves the construction efficiency and economic benefits.展开更多
[Objectives]This study was conducted to obtain the best planting technology system of Dysosma versipellis.[Methods]The rhizomes of D.versipellis were selected as the propagation material.Experiments were conducted on ...[Objectives]This study was conducted to obtain the best planting technology system of Dysosma versipellis.[Methods]The rhizomes of D.versipellis were selected as the propagation material.Experiments were conducted on one-year-old,two-year-old and three-year-old rhizomes to investigate the effects of hormone formula,soaking time,and growth years on the planting technology.[Results]The effects of various factors on the growth rate of D.versipellis ranked as hormone formula>rhizome age>soaking time(h).The optimal combination was A_(2)B_(2)C_(3),which corresponded to three-year-old rhizomes soaked for 12 h in a hormone solution containing BA 2 mg/L+NAA 0.2 mg/L.Adventitious roots of D.versipellis(including isolated adventitious roots and adventitious roots attached to two-year-old rhizomes)were also used for propagation,while also considering whether to add Shuangjier(GGR)solution,with soaking times in the GGR solution set at 4,12,and 24 h,respectively.The results indicated that soaking the roots attached to rhizomes in GGR solution for 12 h yielded the highest growth rate.[Conclusions]This study not only provides technical support for the cultivation of D.versipellis,but also offers a reference for formulating corresponding Technical Operating Procedures(SOP)and establishing demonstration bases.展开更多
基金supported by the National Natural Science Foundation of China(22074072,22274083,52376199)the Shandong Provincial Natural Science Foundation(ZR2023LZY005)+1 种基金the Exploration Project of the State Key Laboratory of BioFibers and EcoTextiles of Qingdao University(TSKT202101)the Fundamental Research Funds for the Central Universities(2022BLRD13,2023BLRD01).
文摘A rapidly growing field is piezoresistive sensor for accurate respiration rate monitoring to suppress the worldwide respiratory illness.However,a large neglected issue is the sensing durability and accuracy without interference since the expiratory pressure always coupled with external humidity and temperature variations,as well as mechanical motion artifacts.Herein,a robust and biodegradable piezoresistive sensor is reported that consists of heterogeneous MXene/cellulose-gelation sensing layer and Ag-based interdigital electrode,featuring customizable cylindrical interface arrangement and compact hierarchical laminated architecture for collectively regulating the piezoresistive response and mechanical robustness,thereby realizing the long-term breath-induced pressure detection.Notably,molecular dynamics simulations reveal the frequent angle inversion and reorientation of MXene/cellulose in vacuum filtration,driven by shear forces and interfacial interactions,which facilitate the establishment of hydrogen bonds and optimize the architecture design in sensing layer.The resultant sensor delivers unprecedented collection features of superior stability for off-axis deformation(0-120°,~2.8×10^(-3) A)and sensing accuracy without crosstalk(humidity 50%-100%and temperature 30-80).Besides,the sensor-embedded mask together with machine learning models is achieved to train and classify the respiration status for volunteers with different ages(average prediction accuracy~90%).It is envisioned that the customizable architecture design and sensor paradigm will shed light on the advanced stability of sustainable electronics and pave the way for the commercial application in respiratory monitory.
基金financially supported by NSFC (No. 21172204)&NSFS (No. ZR2009CQ014)863 Program of China (Nos. 2013AA092901, 2012AA092104 and 2011AA09070106)+1 种基金973 Program of China (No. 2010CB833804)Scientifc Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China (No. [2010]1174)
文摘A new cytotoxic pyrrolidinoindoline diketopiperazine dimer, cristatumin E （1）, was isolated from the fermentation broth of the algal fungus Eurotium herbariorum HT-2 associated with the marine algae, Enteromorpha prolifera. The structure was determined by spectroscopic analyses and Marfey＇s amino acid analysis. Cristatumin E （1） showed cytotoxicity against K562 tumor cell line and antibacterial activity against Enterobacter aerogenes and Escherichia coli with IC50 and MIC values of 8.3, 44.0 and 44.0 μmol/L, respectively.
基金financially supported by the National Natural Science Foundation of China(Nos.41876172,41806086,U150122141376148&U1606403)the Fundamental Research Funds for the Central Universities(No.201841006)
文摘Pafuranones A(1)and B(2),a pair of new epimeric polyketide dimers,were isolated from the fungus Paraconiothyrium sp.OUCMDZ-3316 associated with the marine algae Enteromorpha prolifera.Their structures,including absolute configurations,were fully elucidated based on spectroscopic analysis,calculated ECD,and chemical methods.Pafuranones A(1)and B(2)possess a rare dimeric furanone skeleton,which might be formed through a conjugate addition of the monomeric units followed by an intramolecular cyclization.
基金Collaborative Innovation Project of University,Anhui Province(Grant No.GXXT-2022-088).
文摘Using the operator correspondence of the real and fictious modes in the thermo entangled state representation, wesolve the quantum master equation describing the diffusion channel and obtain the Kraus operator-sum representation ofits analytical solution. we find that the pure coherent states evolve into the new mixed thermal superposed states in thediffusion channel. Also, we investigate the statistical properties of the initial coherent states and their entropy evolutions inthe diffusion channel, and find that the entropy evolutions are only related to the decay time and without the amplitudes ofthe initial coherent states.
文摘Pyro-breaker is a fast-responding and high-reliable explosive-driven circuit breaker,which has been applied in several quench protection systems,such as International Thermonuclear Experimental Reactor and Experimental Advanced Superconducting Tokamak.As an indispensable back-up switch,Pyro-breaker guarantees the reliability and safety of the system and avoids tremendous loss when quench happens.Electrical contact,a crucial part of an electrical device greatly determines the steady current capacity of a Pyro-breaker.However,due to the complexity of the model and the deficiency knowledge of the microstate of contact areas,an accurate calculation for contact resistance is difficult to acquire.A study of electrical contact in the design of a Pyro-breaker has been presented in this paper.An engineering calculation method is verified with experiments.Parameters are fitted for the presented model,which will be a significant theoretical basis for the future designing.
基金financially supported by the National Key Research and Development Program of China(No.2019YFC0312504)the National Natural Science Foundation of China(Nos.41876172,U1906213)。
文摘(±)-Pyriindolin(1)with a rare molecular backbone formed by fusing a 2,2'-bipyridine nucleus into a spiro[furan-3,3'-indoline]skeleton,was isolated from the Streptomyces albolongus EA12432.The constitution and the relative configuration of(±)-1 were determined by extensive spectroscopic analyses,^(13)C calculation and DP4+probability analysis.The absolute configurations of optically pure(+)-1 and(-)-1 which were obtained after a chiral high performance liquid chromatography(HPLC)separation were further identified by electronic circular dichroism(ECD)calculations.(+)-and(-)-Pyriindolins displayed moderate cytotoxicity against HCT-116 cell line with the half-maximal inhibitory concentration(IC_(50))values of 2.89±0.17μmol/L and 4.47±0.26μmol/L,respectively.
文摘Correction to:Neurosci.Bull.December,2016,32(6):577–584.https://doi.org/10.1007/s12264-016-0068-z In this article,in Fig 5A,the picture of the Vector+Nogo-66 group was incorrect and should have appeared as shown below.
基金The National Natural Science Foundation of China,82460684,Li-Ping WangWest Light Foundation,Chinese Academy of Sciences,RZ[2022]4,Li-Ping Wang+3 种基金Research Foundation for Advanced Talents(D.Wang),TCZJZ[2022]02,Dong-Yang WangProject of State Key Laboratory of Functions and Applications of Medicinal Plants,Guizhou Medical University,QJJ[2022]419,Peng FuCultivation project of National Natural Science Foundation of Guizhou Medical University,20NSP065,Li-Ping Wangthe 100 Leading Talents of Guizhou Province,W.Zhu,Wei-Ming Zhu.
文摘A chemical investigation of Streptomyces sp.GZWMJZ-662,an endophytic actinomycete isolated from Houttuynia cordata Thunb.,has yielded eleven bohemamine dimers(1-11).Notably,the newly identified dibohemamines I-O(1-7)have not been previously reported.Their structures were elucidated through detailed spectroscopic analysis,encompassing high-resolution electrospray ionization mass,nuclear magnetic resonance,infrared radiation,ultraviolet-visible,and electronic circular dichroism spectroscopy.Dibohemamine I(1)exhibited selective cytotoxic effects against the cancer cell lines 786-O and GBC-SD among the 18 cell lines evaluated,with the half-inhibitory concentration values of 3.24±0.20 and 7.36±0.41μM,respectively.
基金supported by the Collaborative Innovation Project of University,Anhui Province(Grant No.GXXT-2022-088)。
文摘In this paper,we propose a new non-Gaussian quantum state,termed the photon-modulated displaced thermal state(DTS).Using the operator ordering method,we obtain the normal ordering product of its density operator and then investigate its normalization,the negativity of its Wigner function and its non-Gaussianity.
文摘The Sulige gas field is a typical low-pressure low-permeability tight sandstone gas reservoir. The reservoir has poor seepage capacity, strong heterogeneity, high mineralization of formation water and extremely scarce water resources on the site. These unfavorable factors have brought great difficulties to the on-site mining process. Now, a nano-composite green environmental protection slick water fracturing fluid system CQFR can be quickly dissolved because of the larger specific surface area, and the small molecular size makes the damage to the reservoir less than 5%, and the average drag reduction effect can reach more than 73%. It can quickly and well dissolve and maintain performance under high salinity conditions and fracturing flowback fluids. It responds well to the complex reservoir conditions on the construction site and makes the flowback fluid recyable, which greatly reduces the consumption of water resources on the construction site and effectively improves the construction efficiency and economic benefits.
基金Supported by National Undergraduate Innovation and Entrepreneurship Training Program of Faculty of Chinese Medicine Science of Guangxi University of Chinese Medicine(202113643016)Univeristy-level Scientific Research Project of Faculty of Chinese Medicine Science of Guangxi University of Chinese Medicine in 2022(2022MS017)National Key Research and Development Program of China(2019YFC171230).
文摘[Objectives]This study was conducted to obtain the best planting technology system of Dysosma versipellis.[Methods]The rhizomes of D.versipellis were selected as the propagation material.Experiments were conducted on one-year-old,two-year-old and three-year-old rhizomes to investigate the effects of hormone formula,soaking time,and growth years on the planting technology.[Results]The effects of various factors on the growth rate of D.versipellis ranked as hormone formula>rhizome age>soaking time(h).The optimal combination was A_(2)B_(2)C_(3),which corresponded to three-year-old rhizomes soaked for 12 h in a hormone solution containing BA 2 mg/L+NAA 0.2 mg/L.Adventitious roots of D.versipellis(including isolated adventitious roots and adventitious roots attached to two-year-old rhizomes)were also used for propagation,while also considering whether to add Shuangjier(GGR)solution,with soaking times in the GGR solution set at 4,12,and 24 h,respectively.The results indicated that soaking the roots attached to rhizomes in GGR solution for 12 h yielded the highest growth rate.[Conclusions]This study not only provides technical support for the cultivation of D.versipellis,but also offers a reference for formulating corresponding Technical Operating Procedures(SOP)and establishing demonstration bases.
