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대중 매체 언어와 국어 연구
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Mechanical^ dielectric and structural characterization of cross-linked PEG-diacrylate/ethylammonium nitrate ionogels
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유전자 알고리즘과 신경망을 이용한 DNA Chip 유전자 선택 방법 연구
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An Brain Image Segmentation Method based on Non-local MRF
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기혼여성 대학원생의 학습욕구^갈등 및 만족도에 대한 인식 연구
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Breast Cancer Mortality in Relation to Clinical Breast Examination and Breast Self-Examination
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- 저자 : Xuhong Qian (검색결과 4 건)
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The Analysis and Comparison of the Needle-puncture Property of Four Types of Silkworm Cocoons
Qian Wang,Yan Zhang,Hao Chen,Rong Zhang,Xuhong Yang,Ping Wang,Pibo Ma 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8
Silkworm cocoons display outstanding properties in many aspects, such as thermal protection, biocompatibilityand mechanical resistance and so on. In this paper, we focus on the puncture properties without detailed exploration of fourtypes of cocoons (three domesticated cocoon and Eri silkworm). Different sections, end and middle, as well as differentdirections, puncturing from inner and outer surface, of four types of aforementioned cocoons were systematically analyzedand compared. The results of present research show that the middle section exhibits a relatively greater needle-punctureresistance compare with end section for three B. mori silkworm cocoons. With regard to different puncture directions, fromexternal and internal surface, puncturing from internal surface exhibits a relatively higher needle-puncture load as well asfracture displacement tendencies compared with needle-puncture performance from external surface no matter in middle orend sections. Combining physical parameter assessment, statistical analysis and needle-puncture performance, this researchinspires a clear-cut frame to design a composite with high puncture resistance.
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Guihua Meng,Jiayu Yan,Jianning Wu,Weifang Zhang,Yixi Wang,Qian Wang,Zhiyong Liu,Xuhong Guo 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2
Water pollution severely effects human health and ecosystems. This paper presents a simple method of superhydrophobic cotton fabric fabrication for oil/water separation, We implemented thiol-ene reaction using 3-(Trimethoxysilyl)propyl methacrylate (TMSPMA) and n-dodecyl mercaptan (NDM). to synthesize low surface energy hydrophobic modifier. Superhydrophobic cotton fabrics demonstrated excellent superhydrophobicity, which makes them outstanding materials for continuous and simultaneous removal of insoluble and emulsified oils. Chemical composition, morphology, and hydrophobicity of these cotton fabrics were confirmed by FTIR spectra, scanning electron microscopy (SEM), and water contact angle measurements, respectively. Fabrics samples maintained their superhydrophobic propertieseven after 20 cycles, separation efficiency was still above 98.5 %. Our superhydrophobic cotton fabric demonstrated a remarkable separation of emulsified oil. We believe that our quick and environmentally friendly method can be used in variety of applications involving water-in-oil emulsion separation and oil purification.
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Xu, Zhaochao,Baek, Kyung-Hwa,Kim, Ha Na,Cui, Jingnan,Qian, Xuhong,Spring, David R.,Shin, Injae,Yoon, Juyoung American Chemical Society 2010 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.132 No.2
<P>It is still a significant challenge to develop a Zn<SUP>2+</SUP>-selective fluorescent sensor with the ability to exclude the interference of some heavy and transition metal (HTM) ions such as Fe<SUP>2+</SUP>, Co<SUP>2+</SUP>, Ni<SUP>2+</SUP>, Cu<SUP>2+</SUP>, Cd<SUP>2+</SUP>, and Hg<SUP>2+</SUP>. Herein, we report a novel amide-containing receptor for Zn<SUP>2+</SUP>, combined with a naphthalimide fluorophore, termed <B>ZTRS</B>. The fluorescence, absorption detection, NMR, and IR studies indicated that <B>ZTRS</B> bound Zn<SUP>2+</SUP> in an imidic acid tautomeric form of the amide/di-2-picolylamine receptor in aqueous solution, while most other HTM ions were bound to the sensor in an amide tautomeric form. Due to this differential binding mode, <B>ZTRS</B> showed excellent selectivity for Zn<SUP>2+</SUP> over most competitive HTM ions with an enhanced fluorescence (22-fold) as well as a red-shift in emission from 483 to 514 nm. Interestingly, the <B>ZTRS</B>/Cd<SUP>2+</SUP> complex showed an enhanced (21-fold) blue-shift in emission from 483 to 446 nm. Therefore, <B>ZTRS</B> discriminated in vitro and in vivo Zn<SUP>2+</SUP> and Cd<SUP>2+</SUP> with green and blue fluorescence, respectively. Due to the stronger affinity, Zn<SUP>2+</SUP> could be ratiometrically detected in vitro and in vivo with a large emission wavelength shift from 446 to 514 nm via a Cd<SUP>2+</SUP> displacement approach. <B>ZTRS</B> was also successfully used to image intracellular Zn<SUP>2+</SUP> ions in the presence of iron ions. Finally, we applied <B>ZTRS</B> to detect zinc ions during the development of living zebrafish embryos.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2010/jacsat.2010.132.issue-2/ja907334j/production/images/medium/ja-2009-07334j_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja907334j'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja907334j'>ACS Electronic Supporting Info</A></P>
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Jian-Jiang Zhong,Wei Wang,Zhen-Jiang Zhao,Yufang Xu,Xuhong Qian 한국생물공학회 2005 Biotechnology and Bioprocess Engineering Vol.10 No.2
A series of fluorine and hydroxyl containing jasmonate derivatives, which were chemically synthesized in our institute, were investigated for their effects on the biosynthesis and heterogeneity of ginsenosides in suspension cultures of Panax notoginseng cells. Compared to the control (without addition of elicitors), 100 M of each of the jasmonate was added on day 4 to the suspension cultures of P. notoginseng cells. It was observed that, jasmonates greatly enhanced the ginsenoside content and the ratio of Rb group to Rg group (i.e. (Rb1 + Rd)/(Rg1 + Re)) in the P. notoginseng cells. Some of the synthetic jasmonates, such as pentafluoropropyl jasmonate (PFPJA), 2-hydroxyethyl jasmonate (HEJA) and 2-hydroxye-thoxyethyl jasmonate (HEEJA), could promote the ginsenoside content to 2.55 0.11, 3.65 0.13 and 2.94 0.06 mg/100 mg DW, respectively, compared to that of 0.64 0.06 mg/100 mg DW for the control and 2.17 0.04 mg/100 mg DW by the commercially available methyl jasmonate (MJA); and they could change the respective Rb:Rg ratio to 1.60 0.04, 1.87 0.01 and 1.56 0.05, compared to that of 0.47 0.01 for the control and 1.42 0.06 by MJA. The results suggest that suitable esterification of MJA with fluorine or hydroxyl group could increase the elicitation activity to induce plant secondary metabolism. The information obtained from this study is useful for hyper-production of heterogeneous products by plant cell cultures.
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