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Molecular characterization of chemosensory protein genes in Bactrocera minax (Diptera: Tephritidae)
Wang Zhao‐Xiang,Qi Zhen‐hua,Chen Jian,Wang Fu‐Lian,Gui Lian‐You,Zhang Guo‐Hui 한국곤충학회 2021 Entomological Research Vol.51 No.7
Chemoreception is of great importance for survival of insects. Chemosensory proteins (CSPs) are believed to be involved in the perireceptor events of chemosensory system in many insect species, but this has not been clarified in the citrus fruit fly, Bactrocera minax, a serious dipteran pest of citrus crops. Previous studies indicated that four CSP genes were identified in many fly speices in Diptera. In the present study, we also identified four CSP genes in B. minax,namely BminCSP1–4, from a transcriptome database. All CSP proteins encoded by these genes bear the typical hallmarks of the CSP family: an N-terminal signal peptide and the four highly conserved cysteine residues. Phylogenetic analysis comparing with other dipteran CSPs indicated that dipteran CSPs may evolved from three ancestral CSP genes, and revealed the sequence diversities of BminCSPs and showed that BminCSP1–4 are clustered in separate groups, indicating the possibility of their contrasting function in B. minax. Furthermore, the tissue distribution of the four CSP genes in adult B. minax was analyzed by real-time quantitiative PCR. The results demonstrated that BminCSP3 are significantly transcriptionally enriched in antennae; BminCSP4 expressed primarily in heads; BminCSP1 and BminCSP2 showed high expressions in different tissues, such as antennae, abdomens and wings. Based on these findings, the different implications for the functions of BminCSPs are discussed. This study will offer a significant indication for further functional studies of the CSPs in B. minax
Factors for Postoperative Gallstone Occurrence in Patients with Gastric Cancer: a Meta-analysis
Chen, Xiang-Jun,Li, Nian,Huang, Ying-De,Ren, Shuang,Liu, Fang,Chen, Lian,Wang, Yong,Chen, Min Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.2
Objective: To evaluate risk factors for gallstones after gastrectomy. Methods: To identify documents published from 1990 to 2011 the Pubmed, Cochrane Library, Springer Link, CBM and WanFang databases were searched and a meta-analysis was performed with RevMan 5.2 software for odds ratios and 95%CIs. Results: Fifteen studies were selected for the meta-analysis. The pooled ORs [95%CIs] were 0.56 [0.43, 0.73], (P<0.0001) for digestive tract reconstruction, 0.80 [0.54, 1.17], (P=0.25) for pylorus preservation, 0.33[0.15, 0.75], (P=0.008) for resection scope of stomach, 0.33 [0.15, 0.75], (P=0.008) for lymphadenectomy, and 0.13 [0.05, 0.33], (P<0.0001) for vagotomy. Conclusions: Digestive tract physical reconstruction and vagus nerve preservation can reduce the morbidity of gallstones after gastrectomy. Total gastrectomy can add to the morbidity of galltones as does increasing the degree of lymph node dissection. There was no significant difference in gallstones with or without pylorus preservation.
Correlations Between Serum IL33 and Tumor Development: a Meta-analysis
Chen, Xiang-Jun,Huang, Ying-De,Li, Nian,Chen, Min,Liu, Fang,Pu, Dan,Zhou, Tao-You Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.8
Background: Interleukin-33 (IL-33) has recently been implicated in tumor development. Methods: Data was obtained from PubMed, EMBASE, Clinical trial, Cochrane Library, Web of Science, CNKI and Wanfang databases. After quality assessment and data extraction, a meta-analysis was performed using Review Manager 5.2 software. Results: There were eight documents included in this meta-analysis. The results showed IL33 levels to be higher in tumor patients than that in health people, but no correlations tumor stage, metastasis and survival time of tumor patients were evident. Conclusion: IL33 may be useful as an alarm factor in tumor detection and prognosis.
( Xiang Yang Ge ),( Yan Xu ),( Xiang Chen ),( Long Yun Zhang ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.1
This study describes a novel strategy to regulate the metabolic flux for lactic acid production in Lactobacillus casei. The ldhL gene encoding L-lactate dehydrogenase (L-LDH) was overexpressed in L. casei, and a two-stage oxygen supply strategy (TOS) that maintained a medium oxygen supply level during the early fermentation phase, and a low oxygen supply level in the later phase was carried out. As a consequence, a maximum L-LDH activity of 95.6 U/ml was obtained in the recombinant strain, which was over 4-fold higher than that of the initial strain. Under the TOS for L. casei (pMG-ldhL), the maximum lactic acid concentration of 159.6 g/l was obtained in 36 h, corresponding to a 62.8% increase. The results presented here provide a novel way to regulate the metabolic flux of L. casei for lactic acid production in different fermentation stages, which is available to enhance organic acid production in other strains.
pH-Dependent formation of boehmite (γ-AlOOH) nanorods and nanoflakes
Chen, Xiang Ying,Lee, Soon W. Elsevier 2007 Chemical physics letters Vol.438 No.4
<P><B>Graphical abstract</B></P><P>Under hydrothermal conditions, we prepared γ-AlOOH 1D nanorods and 2D nanoflakes by pH control. One possible mechanism for the formation of these materials was proposed.</P><ce:figure></ce:figure> <P><B>Abstract</B></P><P>Under hydrothermal conditions, we prepared γ-AlOOH 1D nanorods and 2D nanoflakes by manipulating the amount of a base in the reaction mixture (i.e., pH control). The acidic conditions turned out to be favored toward the formation of the nanorods, and the basic conditions toward the formation of the nanoflakes. One possible mechanism for the formation of these materials was proposed. The nanorods exhibited a blue shift in the emission spectrum, but the nanoflakes did not. Our simple and straightforward method might be applied to prepare other nanocrystals with controllable sizes and shapes.</P>
Modeling and designing intelligent adaptive sliding mode controller for an Eight-Rotor MAV
Xiang-jian Chen,Di Li 한국항공우주학회 2013 International Journal of Aeronautical and Space Sc Vol.14 No.2
This paper focuses on the modeling and intelligent control of the new Eight-Rotor MAV, which is used to solve the problem of the low coefficient proportion between lift and gravity for the Quadrotor MAV. The Eight-Rotor MAV is a nonlinear plant, so that it is difficult to obtain stable control, due to uncertainties. The purpose of this paper is to propose a robust, stable attitude control strategy for the Eight-Rotor MAV, to accommodate system uncertainties, variations, and external disturbances. First, an interval type-Ⅱ fuzzy neural network is employed to approximate the nonlinearity function and uncertainty functions in the dynamic model of the Eight-Rotor MAV. Then, the parameters of the interval type-Ⅱ fuzzy neural network and gain of sliding mode control can be tuned on-line by adaptive laws based on the Lyapunov synthesis approach, and the Lyapunov stability theorem has been used to testify the asymptotic stability of the closed-loop system. The validity of the proposed control method has been verified in the Eight-Rotor MAV through real-time experiments. The experimental results show that the performance of the interval type-Ⅱ fuzzy neural network based adaptive sliding mode controller could guarantee the Eight- Rotor MAV control system good performances under uncertainties, variations, and external disturbances. This controller is significantly improved, compared with the conventional adaptive sliding mode controller, and the type-Ⅰ fuzzy neural network based sliding mode controller.
Radar Emitter Signals Identification with a Optimal Recurrent Type 2 Wavelet Fuzzy Neural Network
Xiang-jian Chen,Di Li,Xi-Bei Yang,Hongmei Li 한국항공우주학회 2018 International Journal of Aeronautical and Space Sc Vol.19 No.3
One optimal recurrent type 2-wavelet fuzzy neural network (RT2WFNN) is proposed in this paper to deal with the problem of emitter identification caused by some types of noise. The RT2WFNN has both an on-line parameter and structure learning ability. The new adaptive method based on gradient decent with Lyapunov theorem used for parameter learning can improve the learning ability of RT2WFNN; the type 2 FCM and optimal improved EKM algorithm are used to select the cluster centers of the membership functions in the antecedent part of fuzzy rules of the RT2WFNN for shortening the adjustment time. A number of simulations are presented to demonstrate the identification capability of the RT2WFNN algorithm for the radar emitter identification. The simulation and actual experimental results illustrated that the proposed RT2WFNN cannot only have better identification capability, but also is relatively more insensitive to noise and accelerate the computing speed.
( Chen Li-xiang ) 성균관대학교 유교문화연구소 2014 儒敎文化硏究(中文版) Vol.0 No.21
禮與人之身心和諧是相契的, 這種契合的基本前提在於人心之和。船山認爲:先王制禮唯以求人心之和, 人心之和的途徑是以禮養之。禮以養人心之和乃船山身心和諧思想的邏輯起點:由人心之和, 則內外交相省察以使人之身心合義(宜)。船山和諧思想的邏輯路線表現爲由人之內心世界的和諧而發展到人之身心和諧。有禮則心泰而行亨, 無禮則心歉而行競, 治人之心莫急於禮。 Li (Rite) is compatible with the harmony between the human body and the mind. This compatibility is based on the harmony of the mind. Wang Chuan-shan thinks that the sage king established li precisely in order to pursue the harmony of the human mind; the way of realizing the harmony of the mind is only through self-cultivation based on li. This idea lays the foundation to the notion of the harmony between body and mind in Wang’s thought: The achievement of the harmony of the mind leads to a proper reflection of the inner and the outer, which in turn leads to the harmony between the body and the mind. This implies in Wang’s thought that the harmony at the physical level can be developed on the basis of the harmony at the mental level. [Article in Chinese]