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The complete mitochondrial genome of fall armyworm Spodoptera frugiperda (Lepidoptera:Noctuidae)
Bo-Ping Tang,Qiu-Ning Liu,Xin-Yue Chai,Dan-Dan Bian,Bao-Ming Ge,Chun-Lin Zhou 한국유전학회 2016 Genes & Genomics Vol.38 No.2
The mitochondrial genome (mitogenome) can provide important information for understanding molecular evolution and phylogenetic analyses. The complete mitogenome of Spodoptera frugiperda (Lepidoptera:Noctuidae) was determined to be 15,365 bp in length and has the typical gene order found in Noctuidae mitogenomes, it includes 13 protein-coding genes (PCGs), two rRNA genes, 22 tRNA genes and a A?T-rich region. The nucleotide composition was biased toward A?T nucleotides (81.09 %) and the AT skew of this mitogenome was slightly positive (0.004). All PCGs were initiated by ATN codons, except for cytochrome c oxidase subunit 1 (cox1) gene which was initiated by CGA. Eight of the 13 PCGs have the incomplete termination codon, T or TA. All the tRNA genes displayed the typical clover-leaf structure of mitochondrial tRNAs, with the exception of trnS1 (AGN). The A?T-rich region was 328 bp in length and consisted of several features common to the Noctuidae insects. Phylogenetic analysis showed that the S. frugiperda was within the Noctuidae.
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Wavelet PWM Technique for Single-Phase Three-Level Inverters
Chun-Fang Zheng,Bo Zhang,Dong-Yuan Qiu,Xiao-Hui Zhang,Le-Ming Xiao 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.6
The wavelet PWM (WPWM) technique has been applied in two-level inverters successfully, but directly applying the WPWM technique to three-level inverters is impossible. This paper proposes a WPWM technique suitable for a single-phase three-level inverter. The work analyzes the control strategy with the WPWM and obtains the design of its parameters. Compared with the SPWM technique for a single-phase three-level inverter under the same conditions, the WPWM can obtain high magnitudes of the output fundamental frequency component, low total harmonic distortion, and simpler digital implementation. The feasibility experiment is given to verify of the proposed WPWM technique.
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En-Tao Wu,Ming-Bo Qiu,Zong-Xiu Yao,Jing-Tao Li,Yi-Miao Zhang 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.25 No.5
Square holes are characterized by high torque and good guidance. They are widely used in various industries, including aviation, aerospace, automobiles, and molding. In this study, a step-by-step electrical discharge machining (SSP) method was used to investigate the precision machining of square blind holes in a titanium alloy. This method integrates a limited set of multiple machining strategies with electrical discharge machining (EDM) by utilizing small shaped formed electrodes and step-by-step feeding for EDM. The main objective of this study was to investigate the machining efficiency and the surface quality of square blind holes in a titanium alloy. Two methods, EDM and SSP, were used to produce roughened circular pre-drilled components and square hole samples. Compared to EDM, SSP met the machining requirements of the square blind hole and improved machining efficiency by over three times, as well as surface quality by 16.06%. Subsequently, the influence of the machining area on precision machining was investigated, and a step-by-step precision machining process was established. Finally, two SSP methods, namely one-time SSP (O-SSP) and multiple SSP (M-SSP), were used for precision machining of rough-machined samples. Compared to O-SSP, M-SSP achieved higher machining accuracy and surface quality, despite its lower machining efficiency. The square hole, with a depth of 25 mm, was refined using M-SSP. It exhibited an upper and lower taper of 0.02 mm, a minimum fillet radius of R 0.04 mm, and a bottom corner radius of R 0.127 mm.
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Wavelet PWM Technique for Single-Phase Three-Level Inverters
Zheng, Chun-Fang,Zhang, Bo,Qiu, Dong-Yuan,Zhang, Xiao-Hui,Xiao, Le-Ming The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.6
The wavelet PWM (WPWM) technique has been applied in two-level inverters successfully, but directly applying the WPWM technique to three-level inverters is impossible. This paper proposes a WPWM technique suitable for a single-phase three-level inverter. The work analyzes the control strategy with the WPWM and obtains the design of its parameters. Compared with the SPWM technique for a single-phase three-level inverter under the same conditions, the WPWM can obtain high magnitudes of the output fundamental frequency component, low total harmonic distortion, and simpler digital implementation. The feasibility experiment is given to verify of the proposed WPWM technique.
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Ru-Ting Liang,Tao Bo,Wan-Qiu Yin,Chang-Ming Nie,Lei Zhang,Zhi-Fang Chai,Wei-Qun Shi Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7
A first-principle approach within the framework of density functional theory was employed to study the effect of vacancy defects and fission products (FPs) doping on the mechanical, electronic, and thermodynamic properties of uranium monocarbide (UC). Firstly, the calculated vacancy formation energies confirm that the C vacancy is more stable than the U vacancy. The solution energies indicate that FPs prefer to occupying in U site rather than in C site. Zr, Mo, Th, and Pu atoms tend to directly replace U atom and dissolve into the UC lattice. Besides, the results of the mechanical properties show that U vacancy reduces the compressive and deformation resistance of UC while C vacancy has little effect. The doping of all FPs except He has a repairing effect on the mechanical properties of U<sub>1-x</sub>C. In addition, significant modifications are observed in the phonon dispersion curves and partial phonon density of states (PhDOS) of UC<sub>1-x</sub>, Zr<sub>x</sub>U<sub>1-x</sub>C, Mo<sub>x</sub>U<sub>1-x</sub>C, and Rh<sub>x</sub>U<sub>1-x</sub>C, including narrow frequency gaps and overlapping phonon modes, which increase the phonon scattering and lead to deterioration of thermal expansion coefficient (α<sub>V</sub>) and heat capacity (C<sub>p</sub>) of UC predicted by the quasi harmonic approximation (QHA) method.
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Jian-lin Zhou,Shi-qing Liu,Bo Qiu,Qiong-jie Hu,Jiang-hua Ming,Hao Peng 연세대학교의과대학 2009 Yonsei medical journal Vol.50 No.6
Purpose: The purpose of this study was to study the protective effect and influence of sodium hyaluronate (Na- HA) on mRNA expression of peroxisome proliferators-activated receptor gamma (PPAR-γ) in cartilage of rabbit osteoarthritis (OA) model. Materials and Methods: Forty eight white rabbits were randomly divided into A, B, and C groups. Group A was normal control group, B and C groups underwent unilateral anterior cruciate ligament transection (ACLT). The rabbits in group B were injected normal saline after ACLT; and Group C received intraarticular1% sodium hyaluronate (HA) injection 5 weeks after surgery, 0.3 mL once a week. At 11th week after surgery, all the rabbits were sacrificed. The cartilage changes on the medial femoral condyles were graded separately. Cartilage sections were stained with safranin-O and HE, and messenger RNA (mRNA) expression of PPAR-γ was detected by using real time polymerase chain reaction (Real Time-PCR). Results: Cartilage degeneration in group B was significantly more severe than in A and C injection group. The grey value of Safranin- O of B group was higher than A and C groups. Expression of PPAR-γ mRNA in group B was higher than group A and C. Conclusion: This study shows that Na-HA has a protective effect on articular cartilage degeneration, and the inhibitory effect on the PPAR-γ mRNA expression may be one of therapeutic mechanism of Na-HA. Purpose: The purpose of this study was to study the protective effect and influence of sodium hyaluronate (Na- HA) on mRNA expression of peroxisome proliferators-activated receptor gamma (PPAR-γ) in cartilage of rabbit osteoarthritis (OA) model. Materials and Methods: Forty eight white rabbits were randomly divided into A, B, and C groups. Group A was normal control group, B and C groups underwent unilateral anterior cruciate ligament transection (ACLT). The rabbits in group B were injected normal saline after ACLT; and Group C received intraarticular1% sodium hyaluronate (HA) injection 5 weeks after surgery, 0.3 mL once a week. At 11th week after surgery, all the rabbits were sacrificed. The cartilage changes on the medial femoral condyles were graded separately. Cartilage sections were stained with safranin-O and HE, and messenger RNA (mRNA) expression of PPAR-γ was detected by using real time polymerase chain reaction (Real Time-PCR). Results: Cartilage degeneration in group B was significantly more severe than in A and C injection group. The grey value of Safranin- O of B group was higher than A and C groups. Expression of PPAR-γ mRNA in group B was higher than group A and C. Conclusion: This study shows that Na-HA has a protective effect on articular cartilage degeneration, and the inhibitory effect on the PPAR-γ mRNA expression may be one of therapeutic mechanism of Na-HA.
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Weng, Ling-Ling,Xiang, Jian-Feng,Lin, Jin-Bo,Yi, Shang-Hui,Yang, Li-Tao,Li, Yi-Sheng,Zeng, Hao-Tao,Lin, Sheng-Ming,Xin, Dong-Wei,Zhao, Hai-Liang,Qiu, Shu-Qi,Chen, Tao,Zhang, Min-Guang Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24
Liver cancer is one of leading digestive malignancies with high morbidity and mortality. There is an urgent need for the development of novel therapies for this deadly disease. It has been proven that asparagus polysaccharide, one of the most active derivates from the traditional medicine asparagus, possesses notable antitumor properties. However, little is known about the efficacy of asparagus polysaccharide as an adjuvant for liver cancer chemotherapy. Herein, we reported that asparagus polysaccharide and its embolic agent form, asparagus gum, significantly inhibited liver tumor growth with transcatheter arterial chemoembolization (TACE) therapy in an orthotopic hepatocellular carcinoma (HCC) tumor model, while significantly inhibiting angiogenesis and promoting tumor cell apoptosis. Moreover, asparagine gelatinous possessed immunomodulatory functions and showed little toxicity to the host. These results highlight the chemotherapeutic potential of asparagus polysaccharide and warrant a future focus on development as novel chemotherapeutic agent for liver cancer TACE therapy.
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Yuqin Liu,Yu Shi,Yongqiang Liu,Ailin Fan,Bo Xu,Haiyan Qiu,Guihong Lan,Ming Zhang 대한환경공학회 2024 Environmental Engineering Research Vol.29 No.6
The overuse of antibiotics has become a serious environmental problem, and addressing how to remove antibiotics from aquatic environments poses a significant challenge. This study prepared a porous biochar material (BSJ) using natural Jacaranda fruit shells as raw materials and combined it with an electric Fenton system (EF-BSJ) to degrade ciprofloxacin hydrochloride (CIP). Characterization and analysis of biochar using SEM, BET, Raman spectroscopy, and other methods revealed that the porous structure and aromatic functional groups of biochar play a crucial role in adsorbing CIP. The effects of carbonization temperature and carbonization time on the adsorption of CIP by biochar were investigated during the biochar preparation process. At 800℃ and 1.5 hours, the maximum adsorption efficiency of biochar for CIP is 96.88%. In addition, thestudy investigated the impact of cathode and anode materials of the EF-BSJ system on the degradation efficiency of CIP. When platinum-titnium plating was used as the anode and foam nickel electrode as the cathoded, the CIP removal rate could reach 95.48%. Finally, the UV full-band scanning method was used to determine that CIP was degraded into small molecule substances, achieving the goal of removing CIP. This study introduces a novel strategy for eliminating antibiotics.
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