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A Survey of the Geographic Distribution of Ophiocordyceps sinensis
Yi Li,Xiao-Liang Wang,Lei Jiao,Yi Jiang,Hui Li,Si-Ping Jiang,Ngarong Lhosumtseiring,Shen-Zhan Fu,Cai-Hong Dong,Yu Zhan,Yi-Jian Yao 한국미생물학회 2011 The journal of microbiology Vol.49 No.6
Ophiocordyceps sinensis is one of the best known fungi in Traditional Chinese Medicine. Many efforts have been devoted to locating the production areas of this species resulting in various reports; however, its geographic distribution remains incompletely understood. Distribution of O. sinensis at the county level is clarified in this work based on both a literature search and fieldwork. More than 3600 publications related to O. sinensis were investigated, including scientific papers, books, and online information. Herbarium specimens of O. sinensis and field collections made by this research group during the years 2000-2010 were examined to verify the distribution sites. A total of 203 localities for O. sinensis have been found, of which 106 are considered as confirmed distribution sites, 65 as possible distribution sites, 29 as excluded distribution sites and three as suspicious distribution sites. The results show that O. sinensis is confined to the Tibetan Plateau and its surrounding regions, including Tibet, Gansu, Qinghai, Sichuan, and Yunnan provinces in China and in certain areas of the southern flank of the Himalayas, in the countries of Bhutan, India and Nepal, with 3,000 m as the lowest altitude for the distribution. The fungus is distributed from the southernmost site in Yulong Naxi Autonomous County in northwestern Yunnan Province to the northernmost site in the Qilian Mountains in Qilian County, Qinghai Province, and from the east edge of the Tibetan Plateau in Wudu County, Gansu Province to the westernmost site in Uttarakhand, India. The clarification of the geographic distribution of O. sinensis will lay the foundation for conservation and sustainable use of the species.
Vision-Based Roadway Sign Recognition
Jiang, Gang-Yi,Park, Tae-Young,Hong, Suk-Kyo Institute of Control 2000 Transaction on control, automation and systems eng Vol.2 No.1
In this paper, a vision-based roadway detection algorithm for an automated vehicle control system, based on roadway sign information on roads, is proposed. First, in order to detect roadway signs, the color scene image is enhanced under hue-invariance. Fuzzy logic is employed to simplify the enhanced color image into a binary image and the binary image is morphologically filtered. Then, an effective algorithm of locating signs based on binary rank order transform (BROT) is utilized to extract signs from the image. This algorithm performs better than those previously presented. Finally, the inner shapes of roadway signs with curving roadway direction information are recognized by neural networks. Experimental results show that the new detection algorithm is simple and robust, and performs well on real sign detection. The results also show that the neural networks used can exactly recognize the inner shapes of signs even for very noisy shapes.
Organic Radical-Linked Covalent Triazine Framework with Paramagnetic Behavior
Jiang, Yi,Oh, Inseon,Joo, Se Hun,Buyukcakir, Onur,Chen, Xiong,Lee, Sun Hwa,Huang, Ming,Seong, Won Kyung,Kim, Jin Hoon,Rohde, Jan-Uwe,Kwak, Sang Kyu,Yoo, Jung-Woo,Ruoff, Rodney S. American Chemical Society 2019 ACS NANO Vol.13 No.5
<P>The production of multifunctional pure organic materials that combine different sizes of pores and a large number of electron spins is highly desirable due to their potential applications as polarizers for dynamic nuclear polarization-nuclear magnetic resonance and as catalysts and magnetic separation media. Here, we report a polychlorotriphenylmethyl radical-linked covalent triazine framework (PTMR-CTF). Two different sizes of micropores were established by N<SUB>2</SUB> sorption and the presence of unpaired electrons (carbon radicals) by electron spin resonance and superconducting quantum interference device-vibrating sample magnetometer analyses. Magnetization measurements demonstrate that this material exhibits spin-half paramagnetism with a spin concentration of ∼2.63 × 10<SUP>23</SUP> spins/mol. We also determined the microscopic origin of the magnetic moments in PTMR-CTF by investigating its spin density and electronic structure using density functional theory calculations.</P> [FIG OMISSION]</BR>
Jiang, Yi,Oh, Inseon,Joo, Se Hun,Buyukcakir, Onur,Chen, Xiong,Lee, Sun Hwa,Huang, Ming,Seong, Won Kyung,Kwak, Sang Kyu,Yoo, Jung-Woo,Ruoff, Rodney S. American Chemical Society 2019 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.141 No.42
<P>We report the synthesis and characterization of a two-dimensional (2D) conjugated Ni(II) tetraaza[14]annulene-linked metal organic framework (<B>NiTAA-MOF</B>) where <B>NiTAA</B> is a macrocyclic MN<SUB>4</SUB> (M = metal, N = nitrogen) compound. The structure of <B>NiTAA-MOF</B> was elucidated by Fourier-transform infrared, X-ray photoemission, and X-ray diffraction spectroscopies, in combination with density functional theory (DFT) calculations. When chemically oxidized by iodine, the insulating bulk <B>NiTAA-MOF</B> (σ < 10<SUP>-10</SUP> S/cm) exhibits an electrical conductivity of 0.01 S/cm at 300 K, demonstrating the vital role of ligand oxidation in the electrical conductivity of 2D MOFs. Magnetization measurements show that iodine-doped <B>NiTAA-MOF</B> is paramagnetic with weak antiferromagnetic coupling due to the presence of organic radicals of oxidized ligands and high-spin Ni(II) sites of the missing-linker defects. In addition to providing further insights into the origin of the induced electrical conductivity in 2D MOFs, both pristine and iodine-doped <B>NiTAA-MOF</B> synthesized in this work could find potential applications in areas such as catalase mimics, catalysis, energy storage, and dynamic nuclear polarization-nuclear magnetic resonance (DNP-NMR).</P> [FIG OMISSION]</BR>
Adaptive control for small-hole EDM process with wavelet transform detecting method
Yi Jiang,Wansheng Zhao,Xuecheng Xi,Lin Gu 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.6
To achieve an efficient small-hole EDM process, an accurate pulse monitoring strategy and a precise control are both required. In order to improve the efficiency and stability of the small-hole drilling process, an adaptive control system with a self-tuning regulator is developed. A high-speed EDM pulses monitoring system based on wavelet transform is implemented to measure the gap status, whose output is adopted as the feedback signals of the adaptive control system. The discharge waveforms are recorded and analyzed. The experimental results demonstrate that the arc pulse ratio during small-hole drilling process is reduced remarkably. The machining efficiency as well as the machining quality is improved significantly.
Jiang, Yi,Ryu, Gyeong Hee,Joo, Se Hun,Chen, Xiong,Lee, Sun Hwa,Chen, Xianjue,Huang, Ming,Wu, Xiaozhong,Luo, Da,Huang, Yuan,Lee, Jeong Hyeon,Wang, Bin,Zhang, Xu,Kwak, Sang Kyu,Lee, Zonghoon,Ruoff, Rodn American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.33
<P>Rational bottorritup construction of two-dimensional (2D) covalent or nonCovalent organic materials with precise structural control at the: atomic or molecular level remains a challenge. The design and synthesis of metal organic frameworks (MOFS) based on new building blocks is of great significance in achieving new types of 2D monolayer MOF films. Here, we demonstrate that a complexation between copper(II) ions and tri(beta-diketone) ligands yields a novel 2D MOF siyucture, either-inthe form of a powder.or.as a monolayer filth. It has been Characterized by Fourier transform infrared, Raman, ultraviolet-visible, X-ray photoelectron, and electron paramagnetic-resonance spectroscopies. Selected area electron diffraction and powder X-ray diffraction results show that the MOF is Crystalline and has a hexagonal structure. A MOF-based membrane has been prepared by vacuum filtration of an aqueous dispersion of the MOF powder onto a porous Anodisc filter having pore-size 0.02 mu m. The porous MOF membrane filters gold nanOparticies with a cutoff of similar to 2.4 nm.</P>
JIANG, Yi-Wei,XU, De,LEE, Moon-Ho,LANG, Cong-Yan Institute of Electronics, Information and Communic 2007 IEICE transactions on information and systems Vol.90 No.10
<P>Visual inpainting is an interpolation problem that restores an image or a frame with missing or damaged parts. Over the past decades, a number of computable models of visual inpainting have been developed, but most of these models are based on the pixel domain. Little theoretical and computational work of visual inpainting is based on the compressed domain. In this paper, a visual inpainting model in the discrete cosine transform (DCT) domain is proposed. DCT coefficients of the non-inpainting blocks are utilized to get block features, and those block features are propagated to the inpainting region iteratively. The experimental results with I frames of MPEG4 are presented to demonstrate the efficiency and accuracy of the proposed algorithm.</P>
Overexpression and Clinicopathological Contribution of DcR3 in Bladder Urothelial Carcinoma Tissues
Jiang, Yi-Qiang,Zhong, Teng-Fei,Dang, Yi-Wu,Zou, Ling-Song,Yang, Liu,Yang, Xia,Chen, Gang Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.21
Background: To explore the expression of DcR3 protein and its clinicopathological significance in bladder urothelial carcinomas (BUC). Materials and Methods: Immunohistochemistry was performed to detect the expression of DcR3, caspase-3, Bcl-2, VEGF, Ki-67, PCNA and P53 in 166 BUC and 56 normal bladder tissues. Western blotting was used to detect the expression of DcR3 in the supernatants of cultured BUC cells. Results: Overexpression of DcR3 was found in BUC tissues and cell lines, with significant elevation as compared to normal bladder tissues (p<0.0001). Higher DcR3 expression was related to the status of invasion, lymph node metastasis and recurrence. Furthermore, DcR3 expression was negatively correlated with caspase-3 and positively associated with Bcl-2, VEGF, Ki-67 labeling index (LI), PCNA LI and P53 (all p<0.0001), respectively. Conclusions: DcR3 may play a crucial role as an oncogene in tumorigenesis, deterioration and progress of BUC via influencing related pathways of apoptosis, proliferation and angiogenesis. The detection of DcR3 protein in the formalinfixed and paraffin-embedded samples could assist to predict in prognosis of BUC patients.
Porous Nano-Ni/Graphene/Loofah Composites for Electromagnetic Interference Shielding
Yi Jiang,Mingwei Liang,Weijing Wang,Xuefei Lai,Kenan Xie,Li Liao,Qin Long 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.4
The urgent requirement of materials with superior electromagnetic shielding properties has been aroused for alleviating electromagnetic pollution. Now, some natural materials such as silkworm cocoon, walnut shell, and so on are gradually used to prepare the electromagnetic interference shielding composites. However, loofah sponges with unique and inherent 3D hierarchical porous structure, which could be obtained from food waste and the wilted loofah, are ignored. In this work, loofah sponges were modified by NaOH and H2 O2 . Then the carbonized modified Loofah/Ni nanoparticles/Graphene composites were prepared by immersion and thermal reduction. Meanwhile, the composites had inherited advantages from natural materials such as low density, porous structure and eco-friendly. As the result of loading of Ni nanoparticles and graphene on the loofah, the outstanding performance was achieved that the shielding effectiveness was raised to 57 dB, and the specific shielding effectiveness was raised to 616.8 dB cm 3 /g. This result demonstrated that composites materials based on natural loofah sponges show tremendous potential for electromagnetic shielding.