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- 저자 : Junjie Ou (검색결과 3 건)
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Junjie Ou,Juan Xie,Yongtang Jia 한국섬유공학회 2021 Fibers and polymers Vol.22 No.3
The metallic fibres-based composite yarns have been increasingly used to make flexible, comfortable andwearable fabric sensors, which have advantages in monitoring human physical and physiological body characteristics. In ourprevious study, flexible and conductive blended yarns made from stainless steel (SS) fibres were fabricated into highlysensitive knitted fabric sensors. However, as the SS weight ratio increased (particularly the pure SS fibres-based yarn), yarnswere easily broken in knitting process. Here we made adjustments to the new series of composite yarns with similar absolutefineness (same diameters) rather than relative fineness (linear density). Not only the problem of yarn breakage has beensolved, it also retains the well-conductive (less than 70 Ω/cm) and flexible and wearable properties. A more important resultis that the varying probe span length makes little impact on these SS fibre mixtures’ values of percolation threshold (0.178based on weight ratio and 0.015 on volume fraction, respectively) and on critical exponents (about 1.3, according with theuniversal conductivity exponent in 2D conductive polymer composite system). The main reason may be on account of thesecomposite yarns having similar diameters (absolute fineness) and so aspect ratio.
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Low pH stress responsive transcriptome of seedling roots in wheat (Triticum aestivum L.)
Haiyan Hu,Jie He,Junjie Zhao,Xingqi Ou,Hongmin Li,Zhengang Ru 한국유전학회 2018 Genes & Genomics Vol.40 No.11
Soil acidification is one of major problems limiting crop growth and especially becoming increasingly serious in China owing to excessive use of nitrogen fertilizer. Only the STOP1 of Arabidopsis was identified clearly sensitive to proton rhizotoxicity and the molecular mechanism for proton toxicity tolerance of plants is still poorly understood. The main objective of this study was to investigate the transcriptomic change in plants under the low pH stress. The low pH as a single factor was employed to induce the response of the wheat seedling roots. Wheat cDNA microarray was used to identify differentially expressed genes (DEGs). A total of 1057 DEGs were identified, of which 761 genes were up-regulated and 296 were downregulated. The greater percentage of up-regulated genes involved in developmental processes, immune system processes, multi-organism processes, positive regulation of biological processes and metabolic processes of the biological processes. The more proportion of down-regulation genes belong to the molecular function category including transporter activity, antioxidant activity and molecular transducer activity and to the extracellular region of the cellular components category. Moreover, most genes among 41 genes involved in ion binding, 17 WAKY transcription factor genes and 17 genes related to transport activity were up-regulated. KEGG analysis showed that the jasmonate signal transduction and flavonoid biosynthesis might play important roles in response to the low pH stress in wheat seedling roots. Based on the data, it is can be deduced that WRKY transcription factors might play a critical role in the transcriptional regulation, and the alkalifying of the rhizosphere might be the earliest response process to low pH stress in wheat seedling roots. These results provide a basis to reveal the molecular mechanism of proton toxicity tolerance in plants.
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Progress on fabrication and application of activated carbon sphere in recent decade
Jingming Lan,Baoying Wang,Chunmiao Bo,Bolin Gong,Junjie Ou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Activated carbon (AC) has a long history as an adsorbent material in many applications, including heavymetal and toxic gas removal as well as air and water filter applications. Activated carbon sphere (ACS) is aspecial type of activated carbon that has a high compressive strength and low ash content. Coal, asphalt,resins, polymers, lignin, carbohydrates, etc. can be utilized as precursors to prepare ACS using simple carbonizationand activation processes. Various parameters such as carbonization temperature, rising rate oftemperature, activation time, activation temperature, activator, different activation methods, etc. havesignificant effects on the performance and quality of the final product. As the size of ACS decreases, differentpreparation methods were adopted to prepare nano-sized or micron-sized spherical activated carbon. However, regardless of the size and shape of spherical activated carbon, it has a wide range of rolesfor the removal of heavy metals, organic dyes, carbon dioxide, volatile organic chemicals, catalyst carriers,gas and energy storage, chemical protection materials, and blood purification. This article mainlyreviews preparation methods of ACS over the last decade, and its applications and the challenges facedby ACS are discussed.
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