N-doped porous carbons with increased yield and hierarchical pore structures for supercapacitors derived from an N-containing phenyl-riched copolymer

Ding-Ming Xue,Shi-Chao Qi,Xin Liu,Yu-Xia Li,Xiao-Qin Liu,Lin-Bing Sun 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-

N-doped porous carbon-based materials (NPCMs) with hierarchical pore structures have beenconsidered to be a suitable alternative to meet the ever-increasing demands for supercapacitors;however, the universally low yield of the NPCMs has restricted their practical applications. Herein, aseries of NPCMs with hierarchical pore structures are synthesized with significantly increased yieldsthrough the carbonization of the copolymer made from 2,4,6-tris(chloromethyl)mesitylene and pphenylenediamine. The development of the hierarchical pore structures and the N content of the NPCMsshow opposite dependences on the increasing carbonization temperature. The NPCM exhibits the bestcapacitive ability only if the sufficiently developed hierarchical structures and moderate N content areachieved simultaneously. Therefore, NPCM-600 that is carbonized at 600 C with an excellent yield of53.6% (wt.), large specific surface area of 1778 m2 g 1, and N content of 4.13% (wt.) yields an ideal specificcapacitance of 298 F g 1 at the current density of 1 A g 1 and a perfect cycling stability of the capacitanceafter 10,000 cycles at 10 A g 1. The yield of the NPCM-600 is considerably higher than those for manyother recently reported NPCMs. NPCM-600 also shows better capacitance than those of the otherreported NPCMs, such as NOPC-bis-CN-3 (167 F g 1) and CHCPB-K-600 (260 F g 1).

Over-expression of phosphoenolpyruvate carboxylase cDNA from C4 millet (Seteria italica) increase rice photosynthesis and yield under upland condition but not in wetland fields

Ding, Zai-Song,Huang, Su-Hua,Zhou, Bao-Yuan,Sun, Xue-Fang,Zhao, Ming 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.2

Phosphoenolpyruvate carboxylase (PEPC) catalyzes the initial fixation of $CO_2$ in $C_4$ plants. Under the control of the rice Rubisco small subunit promoter, cDNA of a $C_4$ SiPPC gene cloned from Seteria italica was introduced into Japonica rice by Agrobacterium-mediated transformation. Integration of the gene was confirmed by PCR analysis. RT-PCR showed expression of the gene at the RNA level in transgenic plants, and enzyme activity measurements confirmed the increase in PEPC protein. The transformants showed improvements in both photosynthesis rate and yield only under upland field cultivation. The possible function of PEPC in rice stress tolerance is discussed.

Barrier Optical Waveguide Fabrication in LiNbO3 Crystal by 4.5-MeV LithiumIon Implantation with Low Dose

Xue-Lin Wang,Ding-Yu Shen,Gang Fu,Hong-Ji Ma,Ke-Ming Wang,Rui Nie,Shi-Ling Li 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1

A barrier planar waveguide was fabricated in z-cut LiNbdO3 crystals by 4.5-MeV lithium ion implantation at a dose of 3 £ 1014 ions/cm2 at room temperature. Dark modes were observed by the prism-coupling method with wavelengths of both 633 nm and 1539 nm. The refractive index pro¯les were reconstructed by using the re°ectivity calculation method. There were about 1.1 % and 0.7 % decreases at the optical barriers of the ordinary and extraordinary refractive index at the wavelength at 633 nm, and the positions of the optical barriers were close to those of the damage peaks calculated by the TRIM098 (Transport of Ions in Matter) code. It is found that the refractive index change may be partly due to the damage induced by nuclear collision.

Over-expression of phosphoenolpyruvate carboxylase cDNA from C4 millet (Seteria italica) increase rice photosynthesis and yield under upland condition but not in wetland fields

Zai-Song Ding,Su-Hua Huang,Bao-Yuan Zhou,Xue-Fang Sun,Ming Zhao 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.2

Phosphoenolpyruvate carboxylase (PEPC) catalyzesthe initial fixation of CO2 in C4 plants. Under thecontrol of the rice Rubisco small subunit promoter, cDNAof a C4 SiPPC gene cloned from Seteria italica wasintroduced into Japonica rice by Agrobacterium-mediatedtransformation. Integration of the gene was confirmed byPCR analysis. RT-PCR showed expression of the gene atthe RNA level in transgenic plants, and enzyme activitymeasurements confirmed the increase in PEPC protein. Thetransformants showed improvements in both photosynthesisrate and yield only under upland field cultivation. Thepossible function of PEPC in rice stress tolerance isdiscussed.

Investigation of Planar Optical Waveguide Formed by MeV He+ Ion - Implantation into NaEr(WO₄)₂ Crystal

Feng Chen,Xue-Lin Wang,Ke-Ming Wang,Zhen-Xiang Cheng,Huan-Chu Chen,Ding-Yu Shen 한국진공학회(ASCT) 2002 Journal of Korean Vacuum Science & Technology Vol.6 No.2

NaEr(WO₄)₂ is a new laser material. The planar optical waveguide was formed in NaEr(WO₄)₂ crystal by 2.6 MeV He^+ ion implantation at doses of 1.0-1.5×10^(16) ions/㎤ at room temperature. The effective refractive indices of the dark modes were measured using the prism coupling method. Four TE modes and five TM modes were observed in the waveguide. The refractive index profiles were analyzed using the reflectivity calculation method (RCM). The influence of heat treatment at moderate temperature on the refractive index profiles of the waveguide was also investigated. We used the TRIM’98 (Transport of Ions in Matter) code to simulate the damage profile in the NaEr(WO₄)₂ crystal by 2.6 MeV He^+ ion implantation which is helpful for a better understanding of the waveguide formation.

Long non-coding RNA TTC28-AS1 attenuates high glucose-induced damage in HK-2 cells depending on the regulation of miR-320a/CD2AP axis

Zhang Ji,Ding Juan,Yu Ming,Li Fang,Zhou Xue,Shuai Hongxia 한국유전학회 2021 Genes & Genomics Vol.43 No.12

Background Diabetic nephropathy (DN) is the leading cause of end-stage renal disease (ESRD) worldwide. Emerging evidence suggests that long non-coding RNAs (lncRNAs) play crucial roles in DN pathogenesis. Objective The purpose of the present study was to explore the role and mechanism of lncRNA tetratricopeptide repeat domain 2B antisense RNA 1 (TTC28-AS1) in DN. Methods Cell viability and apoptosis were assessed by the Cell Counting-8 Kit (CCK-8) assay and fow cytometry, respectively. The levels of TTC28-AS1, miR-320a and CD2-associated protein (CD2AP) were determined by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot. The levels of interleukin-6 (IL-6), tumor necrosis factor-α (TNFα), and IL-8 were gauged by enzyme-linked immunosorbent assay (ELISA). Targeted relationship between miR-320a and TTC28-AS1 or CD2AP was evaluated by dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. Results Our data indicated that high glucose (HG) induced HK-2 cell damage by the repression of cell viability and autophagy and the enhancement of cell apoptosis, fbrosis and pro-infammatory cytokines production. TTC28-AS1 was down-regulated and miR-320a was up-regulated in HG-induced HK-2 cells. TTC28-AS1 overexpression or miR-320a knockdown alleviated HG-induced damage in HK-2 cells. MiR-320 was a molecular mediator of TTC28-AS1 in regulating HG-induced HK-2 cell damage. Moreover, TTC28-AS1 functioned as a post-transcriptional regulator of CD2AP expression by miR-320a. MiR-320a knockdown relieved HG-induced damage in HK-2 cells by up-regulating CD2AP. Conclusions Our fndings suggest that TTC28-AS1 attenuates HG-induced damage in HK-2 cells at least partially by targeting the miR-320a/CD2AP axis, highlighting its role as a promising therapeutic approach for DN treatment.

Biotransformation of natural polyacetylene in red ginseng by Chaetomium globosum

Wang, Bang-Yan,Yang, Xue-Qiong,Hu, Ming,Shi, Li-Jiao,Yin, Hai-Yue,Wu, Ya-Mei,Yang, Ya-Bin,Zhou, Hao,Ding, Zhong-Tao The Korean Society of Ginseng 2020 Journal of Ginseng Research Vol.44 No.6

Background: Fermentation has been shown to improve the biological properties of plants and herbs. Specifically, fermentation causes decomposition and/or biotransformation of active metabolites into high-value products. Polyacetylenes are a class of polyketides with a pleiotropic profile of bioactivity. Methods: Column chromatography was used to isolate compounds, and extensive NMR experiments were used to determine their structures. The transformation of polyacetylene in red ginseng (RG) and the production of cazaldehyde B induced by the extract of RG were identified by TLC and HPLC analyses. Results: A new metabolite was isolated from RG fermented by Chaetomium globosum, and this new metabolite can be obtained by the biotransformation of polyacetylene in RG. Panaxytriol was found to exhibit the highest antifungal activity against C. globosum compared with other major ingredients in RG. The fungus C. globosum cultured in RG extract can metabolize panaxytriol to Metabolite A to survive, with no antifungal activity against itself. Metabolites A and B showed obvious inhibition against NO production, with ratios of 42.75 ± 1.60 and 63.95 ± 1.45% at 50 µM, respectively. A higher inhibitory rate on NO production was observed for Metabolite B than for a positive drug. Conclusion: Metabolite A is a rare example of natural polyacetylene biotransformation by microbial fermentation. This biotransformation only occurred in fermented RG. The extract of RG also stimulated the production of a new natural product, cazaldehyde B, from C. globosum. The lactone in Metabolite A can decrease the cytotoxicity, which was deemed to be the intrinsic activity of polyacetylene in ginseng.