The implementation of multiple pathogen testing is essential for a rapid response to future outbreaks and for reducing disease transmission.This study introduces a 96-channel microfluidic chip,fabricated through a mol...The implementation of multiple pathogen testing is essential for a rapid response to future outbreaks and for reducing disease transmission.This study introduces a 96-channel microfluidic chip,fabricated through a molding process,which enables the batch detection of pathogens.It explores the rapid lysis and elution processes of pathogens within the microfluidic chips to ensure that nucleic acid extraction,elution,and amplification are completed entirely within the chip.This chip can extract nucleic acids from samples in just 10 min,achieving an extraction efficiency comparable to that of traditional in-tube methods.An oil phase is pre-loaded into the chip to effectively prevent aerosol contamination.This approach allows for the simultaneous detection of 21 common respiratory pathogens,with a detection limit of 10 copies per reaction.Furthermore,applications involving clinical samples demonstrate significant practicality.Compared to many traditional in-tube pathogen detection methods and molecular biology technologies that utilize microfluidic chips,this detection chip not only enables simultaneous detection of multiple pathogens but also demonstrates high sensitivity.展开更多
果肉颜色是猕猴桃重要的品质性状,不同果肉颜色的猕猴桃在色素成分、糖和维生素C含量等方面存在很大差异。为了探究猕猴桃果肉颜色形成的分子机制,本研究以红肉猕猴桃‘红实2号’和黄肉猕猴桃‘金实1号’为研究对象,采用RNA-seq技术,通...果肉颜色是猕猴桃重要的品质性状,不同果肉颜色的猕猴桃在色素成分、糖和维生素C含量等方面存在很大差异。为了探究猕猴桃果肉颜色形成的分子机制,本研究以红肉猕猴桃‘红实2号’和黄肉猕猴桃‘金实1号’为研究对象,采用RNA-seq技术,通过分析果实不同时期不同部位的转录组表达差异。结果表明,编码花青素合成的Achn385311(3GGT)基因可能是控制‘红实2号’内果皮呈红色的主效基因,‘金实1号’后期果肉呈深黄色可能与Achn158981(GT7)、Achn150731、Achn068721(PAO)、Achn282201(PAO)和Achn176251(UGT71A16)等基因的表达调控有关。针对差异表达的230个猕猴桃果肉颜色相关基因,利用Primer Premier 5.0设计出727对EST-SSR引物,以7份不同果肉颜色的猕猴桃基因组DNA为模板,随机选择112对引物进行有效性验证,筛选出了具有清晰的扩增产物的引物78对,有效扩增率为69.64%,58对具有多态性,多态性频率为74.36%。本研究结果为猕猴桃果实呈色机理研究及分子标记辅助育种提供了理论基础。展开更多
为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体...为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体间平均有效等位基因数为3.48个;观测等位基因数(N_(a))为6.25;有效等位基因数(N_(e))为2.983;Shannon多样性指数(I)为1.251;Nei基因多样性指数(H)为0.646。POPGENE分析表明遗传分化系数(F_(st))为0.063,居群间存在中度分化,基因流(N_(m))为3.710。AMOVA分子方差分析表明,阿萨姆茶的遗传变异14%发生在居群间,86%发生在居群内,说明阿萨姆茶居群遗传变异主要发生在居群内部,且基因交流丰富。南涧县古茶园古茶树居群的遗传多样性丰富,这为阿萨姆茶种质资源的保护利用和新品种选育提供了科学依据。展开更多
Advancements in mode-division multiplexing(MDM)techniques,aimed at surpassing the Shannon limit and augmenting transmission capacity,have garnered significant attention in optical fiber communica-tion,propelling the d...Advancements in mode-division multiplexing(MDM)techniques,aimed at surpassing the Shannon limit and augmenting transmission capacity,have garnered significant attention in optical fiber communica-tion,propelling the demand for high-quality multiplexers and demultiplexers.However,the criteria for ideal-mode multiplexers/demultiplexers,such as performance,scalability,compatibility,and ultra-compactness,have only partially been achieved using conventional bulky devices(e.g.,waveguides,grat-ings,and free space optics)—an issue that will substantially restrict the application of MDM techniques.Here,we present a neuro-meta-router(NMR)optimized through deep learning that achieves spatial multi-mode division and supports multi-channel communication,potentially offering scalability,com-patibility,and ultra-compactness.An MDM communication system based on an NMR is theoretically designed and experimentally demonstrated to enable simultaneous and independent multi-dataset transmission,showcasing a capacity of up to 100 gigabits per second(Gbps)and a symbol error rate down to the order of 104,all achieved without any compensation technologies or correlation devices.Our work presents a paradigm that merges metasurfaces,fiber communications,and deep learning,with potential applications in intelligent metasurface-aided optical interconnection,as well as all-optical pat-tern recognition and classification.展开更多
Multiple quantum well(MQW) Ⅲ-nitride diodes that can simultaneously emit and detect light feature an overlapping region between their electroluminescence and responsivity spectra, which allows them to be simultaneous...Multiple quantum well(MQW) Ⅲ-nitride diodes that can simultaneously emit and detect light feature an overlapping region between their electroluminescence and responsivity spectra, which allows them to be simultaneously used as both a transmitter and a receiver in a wireless light communication system. Here, we demonstrate a mobile light communication system using a time-division multiplexing(TDM) scheme to achieve bidirectional data transmission via the same optical channel.Two identical blue MQW diodes are defined by software as a transmitter or a receiver. To address the light alignment issue, an image identification module integrated with a gimbal stabilizer is used to automatically detect the locations of moving targets;thus, underwater audio communication is realized via a mobile blue-light TDM communication mode. This approach not only uses a single link but also integrates mobile nodes in a practical network.展开更多
Introduction: Arbovirus diseases such as dengue and chikungunya threaten public health worldwide. Early and rapid diagnosis and surveillance of dengue virus (DENV) and chikungunya virus (CHIKV) infections are essentia...Introduction: Arbovirus diseases such as dengue and chikungunya threaten public health worldwide. Early and rapid diagnosis and surveillance of dengue virus (DENV) and chikungunya virus (CHIKV) infections are essential to the control of these diseases. In this study, we evaluate the diagnostic performance of our new in-house multiplex RT-qPCR method for detecting DENV serotypes and CHIKV in an external laboratory. Methodology: The evaluation study was conducted on 200 clinical samples of suspected patients for arbovirus disease infection, collected in Centre de Recherche Biomoléculaire Pietro Annigoni (CERBA), Ouagadougou, Burkina Faso. Our new multiplex RT-qPCR was compared to the commercial kit, the Zika, Dengue, and Chikungunya (ZDC) Real-Time PCR Assays kit (Bio-Rad, California, USA). Results and Conclusions: Among 200 samples, 21.5% (43/200) were DENV-positive by multiplex RT-qPCR, and 21.5% (43/200) were also DENV-positive by reference real-time RT-PCR. 157 (78.5%) samples tested negative for DENV by both tests (new mRT-qPCR and reference test). The sensitivity and specificity of mRT-qPCR were 100%. The DENV serotypes detected were DENV-1 60.5% (26/43) and DENV-3 39.5% (17/43). CHIKV was not detected in this study. Our new mRT-qPCR is sensitive, cost-effective, simple, and can be used in developing country laboratories.展开更多
We demonstrate a bipolar graphene/F_(16)CuPc synaptic transistor(GFST)with matched p-type and n-type bipolar properties,which emulates multiplexed neurotransmission of the release of two excitatory neurotransmitters i...We demonstrate a bipolar graphene/F_(16)CuPc synaptic transistor(GFST)with matched p-type and n-type bipolar properties,which emulates multiplexed neurotransmission of the release of two excitatory neurotransmitters in graphene and F_(16)CuPc channels,separately.This process facilitates fast-switching plasticity by altering charge carriers in the separated channels.The complementary neural network for image recognition of Fashion-MNIST dataset was constructed using the matched relative amplitude and plasticity properties of the GFST dominated by holes or electrons to improve the weight regulation and recognition accuracy,achieving a pattern recognition accuracy of 83.23%.These results provide new insights to the construction of future neuromorphic systems.展开更多
基金supported by grants from the National Key Research and Development Program of China(Nos.2023YFA0915200,2023YFA0915204)the Equipment Research and Development Projects of the Chinese Academy of Sciences(No.PTYQ2024YZ0010)+3 种基金the Science and Technology Commission of Shanghai Municipality Project(No.XTCX-KJ-2024-038)the Natural Science Foundation of Hebei Province of China(No.H2024206249)the Postdoctoral Fellowship Program of CPSF(No.GZC20232838)Science and Technology Commission of Shanghai Municipality(No.22S31901700).
文摘The implementation of multiple pathogen testing is essential for a rapid response to future outbreaks and for reducing disease transmission.This study introduces a 96-channel microfluidic chip,fabricated through a molding process,which enables the batch detection of pathogens.It explores the rapid lysis and elution processes of pathogens within the microfluidic chips to ensure that nucleic acid extraction,elution,and amplification are completed entirely within the chip.This chip can extract nucleic acids from samples in just 10 min,achieving an extraction efficiency comparable to that of traditional in-tube methods.An oil phase is pre-loaded into the chip to effectively prevent aerosol contamination.This approach allows for the simultaneous detection of 21 common respiratory pathogens,with a detection limit of 10 copies per reaction.Furthermore,applications involving clinical samples demonstrate significant practicality.Compared to many traditional in-tube pathogen detection methods and molecular biology technologies that utilize microfluidic chips,this detection chip not only enables simultaneous detection of multiple pathogens but also demonstrates high sensitivity.
文摘果肉颜色是猕猴桃重要的品质性状,不同果肉颜色的猕猴桃在色素成分、糖和维生素C含量等方面存在很大差异。为了探究猕猴桃果肉颜色形成的分子机制,本研究以红肉猕猴桃‘红实2号’和黄肉猕猴桃‘金实1号’为研究对象,采用RNA-seq技术,通过分析果实不同时期不同部位的转录组表达差异。结果表明,编码花青素合成的Achn385311(3GGT)基因可能是控制‘红实2号’内果皮呈红色的主效基因,‘金实1号’后期果肉呈深黄色可能与Achn158981(GT7)、Achn150731、Achn068721(PAO)、Achn282201(PAO)和Achn176251(UGT71A16)等基因的表达调控有关。针对差异表达的230个猕猴桃果肉颜色相关基因,利用Primer Premier 5.0设计出727对EST-SSR引物,以7份不同果肉颜色的猕猴桃基因组DNA为模板,随机选择112对引物进行有效性验证,筛选出了具有清晰的扩增产物的引物78对,有效扩增率为69.64%,58对具有多态性,多态性频率为74.36%。本研究结果为猕猴桃果实呈色机理研究及分子标记辅助育种提供了理论基础。
文摘为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体间平均有效等位基因数为3.48个;观测等位基因数(N_(a))为6.25;有效等位基因数(N_(e))为2.983;Shannon多样性指数(I)为1.251;Nei基因多样性指数(H)为0.646。POPGENE分析表明遗传分化系数(F_(st))为0.063,居群间存在中度分化,基因流(N_(m))为3.710。AMOVA分子方差分析表明,阿萨姆茶的遗传变异14%发生在居群间,86%发生在居群内,说明阿萨姆茶居群遗传变异主要发生在居群内部,且基因交流丰富。南涧县古茶园古茶树居群的遗传多样性丰富,这为阿萨姆茶种质资源的保护利用和新品种选育提供了科学依据。
基金supported by the National Key Research and Development Program of China(2023YFB2804704)the National Natural Science Foundation of China(12174292,12374278,and 62105250).
文摘Advancements in mode-division multiplexing(MDM)techniques,aimed at surpassing the Shannon limit and augmenting transmission capacity,have garnered significant attention in optical fiber communica-tion,propelling the demand for high-quality multiplexers and demultiplexers.However,the criteria for ideal-mode multiplexers/demultiplexers,such as performance,scalability,compatibility,and ultra-compactness,have only partially been achieved using conventional bulky devices(e.g.,waveguides,grat-ings,and free space optics)—an issue that will substantially restrict the application of MDM techniques.Here,we present a neuro-meta-router(NMR)optimized through deep learning that achieves spatial multi-mode division and supports multi-channel communication,potentially offering scalability,com-patibility,and ultra-compactness.An MDM communication system based on an NMR is theoretically designed and experimentally demonstrated to enable simultaneous and independent multi-dataset transmission,showcasing a capacity of up to 100 gigabits per second(Gbps)and a symbol error rate down to the order of 104,all achieved without any compensation technologies or correlation devices.Our work presents a paradigm that merges metasurfaces,fiber communications,and deep learning,with potential applications in intelligent metasurface-aided optical interconnection,as well as all-optical pat-tern recognition and classification.
基金jointly supported by the National Natural Science Foundation of China (U21A20495)Natural Science Foundation of Jiangsu Province (BG2024023)+1 种基金National Key Research and Development Program of China (2022YFE0112000)111 Project (D17018)。
文摘Multiple quantum well(MQW) Ⅲ-nitride diodes that can simultaneously emit and detect light feature an overlapping region between their electroluminescence and responsivity spectra, which allows them to be simultaneously used as both a transmitter and a receiver in a wireless light communication system. Here, we demonstrate a mobile light communication system using a time-division multiplexing(TDM) scheme to achieve bidirectional data transmission via the same optical channel.Two identical blue MQW diodes are defined by software as a transmitter or a receiver. To address the light alignment issue, an image identification module integrated with a gimbal stabilizer is used to automatically detect the locations of moving targets;thus, underwater audio communication is realized via a mobile blue-light TDM communication mode. This approach not only uses a single link but also integrates mobile nodes in a practical network.
文摘Introduction: Arbovirus diseases such as dengue and chikungunya threaten public health worldwide. Early and rapid diagnosis and surveillance of dengue virus (DENV) and chikungunya virus (CHIKV) infections are essential to the control of these diseases. In this study, we evaluate the diagnostic performance of our new in-house multiplex RT-qPCR method for detecting DENV serotypes and CHIKV in an external laboratory. Methodology: The evaluation study was conducted on 200 clinical samples of suspected patients for arbovirus disease infection, collected in Centre de Recherche Biomoléculaire Pietro Annigoni (CERBA), Ouagadougou, Burkina Faso. Our new multiplex RT-qPCR was compared to the commercial kit, the Zika, Dengue, and Chikungunya (ZDC) Real-Time PCR Assays kit (Bio-Rad, California, USA). Results and Conclusions: Among 200 samples, 21.5% (43/200) were DENV-positive by multiplex RT-qPCR, and 21.5% (43/200) were also DENV-positive by reference real-time RT-PCR. 157 (78.5%) samples tested negative for DENV by both tests (new mRT-qPCR and reference test). The sensitivity and specificity of mRT-qPCR were 100%. The DENV serotypes detected were DENV-1 60.5% (26/43) and DENV-3 39.5% (17/43). CHIKV was not detected in this study. Our new mRT-qPCR is sensitive, cost-effective, simple, and can be used in developing country laboratories.
基金supported by the Shenzhen Science and Technology Program(No.JCYJ20210324121002008)the National Science Fund for Distinguished Young Scholars of China(No.T2125005)+5 种基金the National Key R&D Program of China(Nos.2022YFE0198200,2022YFA1204500,and 2022YFA1204504)the Natural Science Foundation of Tianjin(Nos.22JCYBJC01290 and 23JCQNJC01440)the Key Project of Natural Science Foundation of Tianjin(No.22JCZDJC00120)the Fundamental Research Funds for the Central Universities,Nankai University(Nos.BEG124901 and BEG124401)the Guangdong Basic and Applied Basic Research Foundation(No.2023A1515110319)the Key Science and Technology Program of Henan Province(No.242102210171).
文摘We demonstrate a bipolar graphene/F_(16)CuPc synaptic transistor(GFST)with matched p-type and n-type bipolar properties,which emulates multiplexed neurotransmission of the release of two excitatory neurotransmitters in graphene and F_(16)CuPc channels,separately.This process facilitates fast-switching plasticity by altering charge carriers in the separated channels.The complementary neural network for image recognition of Fashion-MNIST dataset was constructed using the matched relative amplitude and plasticity properties of the GFST dominated by holes or electrons to improve the weight regulation and recognition accuracy,achieving a pattern recognition accuracy of 83.23%.These results provide new insights to the construction of future neuromorphic systems.
