Stretchable electronics represents a direction of recent development in next-generation semiconductor devices.Such systems have the potential to offer the performance of conventional wafer-based technologies,but they ...Stretchable electronics represents a direction of recent development in next-generation semiconductor devices.Such systems have the potential to offer the performance of conventional wafer-based technologies,but they can be stretched like a rubber band,twisted like a rope, bent over a pencil,and folded like a piece of paper.Isolating the active devices from strains associated with such deformations is an important aspect of design.One strategy involves the shielding of the electronics from deformation of the substrate through insertion of a compliant adhesive layer. This paper establishes a simple,analytical model and validates the results by the finite element method.The results show that a relatively thick,compliant adhesive is effective to reduce the strain in the electronics,as is a relatively short film.展开更多
[Objective]The paper was to isolate and identify Botrytis cinerea from processing tomato.[Method]The strain nky007a was isolated and purified from fruits infected by tomato grey mold.After identification,it was determ...[Objective]The paper was to isolate and identify Botrytis cinerea from processing tomato.[Method]The strain nky007a was isolated and purified from fruits infected by tomato grey mold.After identification,it was determined as B.cinerea.The 18S rDNA and internal transcriptional spacer(ITS)sequences of strain nky007a were amplified for molecular identification and classification.[Result]The 18S rDNA sequence of the strain shared the homology of 99.95%with Botryotinia fuckeliana(EF 110887.1);the ITS rDNA sequence had the homology of 100%with Botryotinia fuckeliana(AB444949.1),and there was no difference in bases.Phylogenetic tree analysis of strain nky007a indicated that nky007a belonged to Botrytis.When healthy tomatoes were infected by the strain,the incidence rate of tomato grey mold was up to 95%,indicating the pathogenicity of the strain.[Conclusion]Morphological identification,molecular identification and pathogenicity analysis results show that the strain nky007a is a highly pathogenetic strain B.cinerea.展开更多
The toxicity of heavy metals (Hg2 + , Zn2 + ) and pesticides has been investigated by comparing the physiological properties in wild and tolerant strains of Synechococcus cedrorum 1191. The differential pattern of gro...The toxicity of heavy metals (Hg2 + , Zn2 + ) and pesticides has been investigated by comparing the physiological properties in wild and tolerant strains of Synechococcus cedrorum 1191. The differential pattern of growth, absorption spectra of pigments and nutrient uptake was observed in tolerant strain.展开更多
To gain a better understanding of the genetic diversity and evolution of PRRSV in the Ningxia Hui Nationality Autonomous Region(Ningxia) of China,the nsp2 genes from a series of PRRSV strains collected from the region...To gain a better understanding of the genetic diversity and evolution of PRRSV in the Ningxia Hui Nationality Autonomous Region(Ningxia) of China,the nsp2 genes from a series of PRRSV strains collected from the region in 2007 were partially sequenced. These sequences were then analyzed along with the classical strain(ch-1a) and two other epidemic strains SD(3) and SD2006. Comparison of the nucleotide sequence with ch-1a indicated that nsp2 genes of seventeen Ningxia isolates(NX strain) have deletions of 87 nucleotides. Sequence analysis indicated that homology between the Ningxia strain and ch-1a was 60.3%-79.9% in the nucleotide sequence,and homology between the NX strains and SD strains was 80.3%-98.8% in the nucleotide sequence. The nsp2 genes of the seventeen isolates had 74.9%-100% nucleotide sequence identities with each other. This study was undertaken to assess the regional variation of prevalent PRRSV and to establish a sequence database for PRRSV molecular epidemiological studies.展开更多
High-density tactile sensor arrays are essential for applications such as Braille reading but remain limited by the intrinsic trade-off between sensitivity and mechanical crosstalk.Here we introduce a capacitive array...High-density tactile sensor arrays are essential for applications such as Braille reading but remain limited by the intrinsic trade-off between sensitivity and mechanical crosstalk.Here we introduce a capacitive array with a gradient high/low modulus strain isolation layer(G-HL-SIL)that suppresses non-local strain transfer while preserving high normal compressibility.Finite element analysis together with experiments reveals how structural parameters govern strain propagation and establishes design principles for balancing sensitivity and crosstalk in dense arrays.Guided by these principles,the array achieves a sensitivity of 3.92 kPa^(−1)with a crosstalk coefficient reduced to 4.39%.Integrated into a slide-recognition-vocalization platform,the system enables 100%static Braille recognition accuracy and 99%dynamic recognition accuracy,while simultaneously lowering mis-triggering events during data acquisition by over 70%.This dual enhancement in accuracy and robustness demonstrates a generalizable strategy for high-density electronic skins and offers a practical pathway toward assistive technologies for the visually impaired.展开更多
基金supported by NSF(DMI-0328162 and ECCS-0824129)the National Natural Science Foundation of China (10820101048)Ministry of Education of China,and the National Basic Research Program of China(2007CB936803).
文摘Stretchable electronics represents a direction of recent development in next-generation semiconductor devices.Such systems have the potential to offer the performance of conventional wafer-based technologies,but they can be stretched like a rubber band,twisted like a rope, bent over a pencil,and folded like a piece of paper.Isolating the active devices from strains associated with such deformations is an important aspect of design.One strategy involves the shielding of the electronics from deformation of the substrate through insertion of a compliant adhesive layer. This paper establishes a simple,analytical model and validates the results by the finite element method.The results show that a relatively thick,compliant adhesive is effective to reduce the strain in the electronics,as is a relatively short film.
基金Science and Technology Guidance Program of Xinjiang Academy of Agricultural Reclamation Sciences(2020YJ019).
文摘[Objective]The paper was to isolate and identify Botrytis cinerea from processing tomato.[Method]The strain nky007a was isolated and purified from fruits infected by tomato grey mold.After identification,it was determined as B.cinerea.The 18S rDNA and internal transcriptional spacer(ITS)sequences of strain nky007a were amplified for molecular identification and classification.[Result]The 18S rDNA sequence of the strain shared the homology of 99.95%with Botryotinia fuckeliana(EF 110887.1);the ITS rDNA sequence had the homology of 100%with Botryotinia fuckeliana(AB444949.1),and there was no difference in bases.Phylogenetic tree analysis of strain nky007a indicated that nky007a belonged to Botrytis.When healthy tomatoes were infected by the strain,the incidence rate of tomato grey mold was up to 95%,indicating the pathogenicity of the strain.[Conclusion]Morphological identification,molecular identification and pathogenicity analysis results show that the strain nky007a is a highly pathogenetic strain B.cinerea.
文摘The toxicity of heavy metals (Hg2 + , Zn2 + ) and pesticides has been investigated by comparing the physiological properties in wild and tolerant strains of Synechococcus cedrorum 1191. The differential pattern of growth, absorption spectra of pigments and nutrient uptake was observed in tolerant strain.
文摘To gain a better understanding of the genetic diversity and evolution of PRRSV in the Ningxia Hui Nationality Autonomous Region(Ningxia) of China,the nsp2 genes from a series of PRRSV strains collected from the region in 2007 were partially sequenced. These sequences were then analyzed along with the classical strain(ch-1a) and two other epidemic strains SD(3) and SD2006. Comparison of the nucleotide sequence with ch-1a indicated that nsp2 genes of seventeen Ningxia isolates(NX strain) have deletions of 87 nucleotides. Sequence analysis indicated that homology between the Ningxia strain and ch-1a was 60.3%-79.9% in the nucleotide sequence,and homology between the NX strains and SD strains was 80.3%-98.8% in the nucleotide sequence. The nsp2 genes of the seventeen isolates had 74.9%-100% nucleotide sequence identities with each other. This study was undertaken to assess the regional variation of prevalent PRRSV and to establish a sequence database for PRRSV molecular epidemiological studies.
基金supported by the National Natural Science Foundation of China(U2330118 and 52403013)the National Key R&D Program of China(2023YFB3813404)the Sichuan Science and Technology Program(2025ZNSFSC1408).
文摘High-density tactile sensor arrays are essential for applications such as Braille reading but remain limited by the intrinsic trade-off between sensitivity and mechanical crosstalk.Here we introduce a capacitive array with a gradient high/low modulus strain isolation layer(G-HL-SIL)that suppresses non-local strain transfer while preserving high normal compressibility.Finite element analysis together with experiments reveals how structural parameters govern strain propagation and establishes design principles for balancing sensitivity and crosstalk in dense arrays.Guided by these principles,the array achieves a sensitivity of 3.92 kPa^(−1)with a crosstalk coefficient reduced to 4.39%.Integrated into a slide-recognition-vocalization platform,the system enables 100%static Braille recognition accuracy and 99%dynamic recognition accuracy,while simultaneously lowering mis-triggering events during data acquisition by over 70%.This dual enhancement in accuracy and robustness demonstrates a generalizable strategy for high-density electronic skins and offers a practical pathway toward assistive technologies for the visually impaired.
