Ultrastructure structure of antennal sensilla of carabid beetle Carabus elysii Thomson, 1856 (Coleoptera: Carabidae)

Wen‐Bo Li,Naiyi Liu,Qin XU,Min Sun,Jie Fang,Shuyan Wang 한국곤충학회 2019 Entomological Research Vol.49 No.2

The sensilla type, number and distribution in male and female adults of Carabus elysii Thomson, 1856 (Coleoptera: Carabidae) were studied using scanning electron microscopy. The results showed that there are seven categories and 12 types of sensilla in C. elysii adults: three types of S.Ch, three types of S.T, two types of S.B and one each of B.B, S.Co, S.Ca and S.Cam. There is no difference between male and female in the types of sensilla. Apart from the significant difference in the number and distribution of S.B.2, S.Co and S.Ca between male dorsal and ventral surfaces, there are no significant differences between male and female antennae. In general, the number of sensilla in females is larger than that in males. The results provide a basic reference for future ultrastructure, electrophysiological, and comparative behavioral studies of Carabus species.

High-Definition Computed Tomography for Coronary Artery Stent Imaging: a Phantom Study

Wen Jie Yang,Ke Min Chen,Li Fang Pang,Ying Guo,Jian Ying Li,Huang Zhang,Zi Lai Pan 대한영상의학회 2012 Korean Journal of Radiology Vol.13 No.1

Objective: To assess the performance of a high-definition CT (HDCT) for imaging small caliber coronary stents (≤ 3 mm) by comparing different scan modes of a conventional 64-row standard-definition CT (SDCT). Materials and Methods: A cardiac phantom with twelve stents (2.5 mm and 3.0 mm in diameter) was scanned by HDCT and SDCT. The scan modes were retrospective electrocardiography (ECG)-gated helical and prospective ECG-triggered axial with tube voltages of 120 kVp and 100 kVp, respectively. The inner stent diameters (ISD) and the in-stent attenuation value (AVin-stent) and the in-vessel extra-stent attenuation value (AVin-vessel) were measured by two observers. The artificial lumen narrowing (ALN = [ISD - ISDmeasured]/ISD) and artificial attenuation increase between in-stent and in-vessel (AAI = AVin-stent - AVin-vessel) were calculated. All data was analyzed by intraclass correlation and ANOVA-test. Results: The correlation coefficient of ISD, AVin-vessel and AVin-stent between the two observers was good. The ALNs of HDCT were statistically lower than that of SDCT (30 ± 5.7% versus 35 ± 5.4%, p < 0.05). HDCT had statistically lower AAI values than SDCT (15.7 ± 81.4 HU versus 71.4 ± 90.5 HU, p < 0.05). The prospective axial dataset demonstrated smaller ALN than the retrospective helical dataset on both HDCT and SDCT (p < 0.05). Additionally, there were no differences in ALN between the 120 kVp and 100 kVp tube voltages on HDCT (p = 0.05). Conclusion: High-definition CT helps improve measurement accuracy for imaging coronary stents compared to SDCT. HDCT with 100 kVp and the prospective ECG-triggered axial technique, with a lower radiation dose than 120 kVp application, may be advantageous in evaluating coronary stents with smaller calibers (≤ 3 mm). Objective: To assess the performance of a high-definition CT (HDCT) for imaging small caliber coronary stents (≤ 3 mm) by comparing different scan modes of a conventional 64-row standard-definition CT (SDCT). Materials and Methods: A cardiac phantom with twelve stents (2.5 mm and 3.0 mm in diameter) was scanned by HDCT and SDCT. The scan modes were retrospective electrocardiography (ECG)-gated helical and prospective ECG-triggered axial with tube voltages of 120 kVp and 100 kVp, respectively. The inner stent diameters (ISD) and the in-stent attenuation value (AVin-stent) and the in-vessel extra-stent attenuation value (AVin-vessel) were measured by two observers. The artificial lumen narrowing (ALN = [ISD - ISDmeasured]/ISD) and artificial attenuation increase between in-stent and in-vessel (AAI = AVin-stent - AVin-vessel) were calculated. All data was analyzed by intraclass correlation and ANOVA-test. Results: The correlation coefficient of ISD, AVin-vessel and AVin-stent between the two observers was good. The ALNs of HDCT were statistically lower than that of SDCT (30 ± 5.7% versus 35 ± 5.4%, p < 0.05). HDCT had statistically lower AAI values than SDCT (15.7 ± 81.4 HU versus 71.4 ± 90.5 HU, p < 0.05). The prospective axial dataset demonstrated smaller ALN than the retrospective helical dataset on both HDCT and SDCT (p < 0.05). Additionally, there were no differences in ALN between the 120 kVp and 100 kVp tube voltages on HDCT (p = 0.05). Conclusion: High-definition CT helps improve measurement accuracy for imaging coronary stents compared to SDCT. HDCT with 100 kVp and the prospective ECG-triggered axial technique, with a lower radiation dose than 120 kVp application, may be advantageous in evaluating coronary stents with smaller calibers (≤ 3 mm).

Self‐assembly of covalent porphyrin compound and its enhanced electrochemiluminescence performance

Wen-Kai Zhu,Wen-Rong Cai,Zhen-Zhi Yin,Ming-Jie Cheng,Kong Yong 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.12

A novel Zn-coordination covalent porphyrin assembly (TCPP-BZA-Zn) is designed. The assembly structure is synthesized through the amidation reac- tion between the porphyrin terminal carboxyl group and the amino group of benzylamine (BZA), and further assembled through π–π stacking. In particular, the inherently ordered structure of TCPP-BZA-Zn with Zn as the catalytic active center endows the porphyrin assembly structure with several obvious advantages, such as high ion transport properties and high electrocatalytic per- formance. In the presence of hydrogen peroxide as a co-reaction reagent, TCPP-BZA-Zn/GCE showed excellent ECL behavior. The amplification phenome- non of ECL was further studied by cyclic voltammetry and the corresponding mechanism was proposed. Based on TCPP-BZA-Zn, an electrochemilumines- cence sensor was constructed for copper ion detection. The ECL intensity of the sensor shows a good linear relationship with the concentration of copper ion in the range of 10 nM–1 mM, and the detection limit is 1.3 nM.

Male hypogonadism caused by a homozygous missense mutation of the LHB gene

( Jie Chen ),( Wen-ting Yi ),( Yuan-Qing Cui ),( Wen-ting Wang ),( Xiong Wang ) 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.6

Preparation of BiPO4-Polyaniline Hybrid and its Enhanced Photocatalytic Performance

Wen Jie Yu,Yang Cheng,Tao Zou,Yi Liu,Kui Wu,Na Peng 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.1

Recently, BiPO4 has been proved to be an efficient photocatalyst which exhibits more attractive activity than that of TiO2-P25 under UV irradiation. However, photocatalytic oxidation-reduction ability of BiPO4 under visible light still needs to be improved. Conjugated polymer just like polyaniline was demonstrated to be a new and efficient visible co-photocatalyst in the field of pollutant governance. As far as we know, the attempt to enhance the photochemical ability of BiPO4 by employing polyaniline as a co-photocatalyst is still very limited. Hence, in order to testify the potential enhanced performance of such heterostructure, BiPO4-polyaniline heterostructure was prepared via hydrothermal method and hybridization in this paper. The experimental results indicated that several typical pollutants such as organic dyes and heavy metal ions can be effectively removed by BiPO4-polyaniline under visible light. The enhanced removal mechanism was attributed to the high separation efficiency of photo-induced electron–hole pairs and more efficient absorption of visible light after the loading of polyaniline on the surface of BiPO4 as an out-layer compared with single BiPO4.

A Fast Method to Evaluate upper Region Strength Safety of Gravity Dam

Wen-jie Niu 대한토목학회 2018 KSCE Journal of Civil Engineering Vol.22 No.7

Strength safety problem of concrete gravity dam is a key issue in the dam design process. For purpose of realistic modeling ofconcrete dam, numerical method has achieved a dominant position. However, models need to be tested with filed experience toconvince that they are applicable, and accompanying sophisticated numerical model makes preliminary design and safety evaluationof concrete dam cumbersome and difficult. So we propose a concise method for strength safety evaluation of triangle dam. In the newmethod, we apply upper stream water pressure and dam self weight on the dam model, and use an analytic solution to obtain damstresses in the dam upper region (two thirds of the height of the dam superstructure). Then, we select Ottosen failure criteria todetermine critically stressed locations and safe locations in the dam upper region. We compared the analysis results by the newmethod with simulated results by Ansys, and there is only slight difference. At last, by the new method, we evaluate effect ofgeometry parameters on upper region strength safety of an ideal right triangle dam considering dam self-weight and full upstreamreservoir water pressure. Results indicate that when the dam wedge top corner angle increases, the upper region safety factor ofstrength is enhanced. The proposed fast method would indeed prove desirable and valuable because it is succinct and cost-effectivefor engineers to make preliminary design and strength safety evaluation of concrete dam. And the proposed fast method may also beused to check the analysis results by numerical simulation software.

Intracranial Atherosclerosis: From Microscopy to High-Resolution Magnetic Resonance Imaging

Wen-jie Yang,Ka Sing Wong,Xiang-yan Chen 대한뇌졸중학회 2017 Journal of stroke Vol.19 No.3

Intracranial atherosclerosis is one of the leading causes of ischemic stroke and occurs more commonly in patients of Asian, African or Hispanic origin than in Caucasians. Although the histopathology of intracranial atherosclerotic disease resembles extracranial atherosclerosis, there are some notable differences in the onset and severity of atherosclerosis. Current understanding of intracranial atherosclerotic disease has been advanced by the high-resolution magnetic resonance imaging (HRMRI), a novel emerging imaging technique that can directly visualize the vessel wall pathology. However, the pathological validation of HRMRI signal characteristics remains a key step to depict the plaque components and vulnerability in intracranial atherosclerotic lesions. The purpose of this review is to describe the histological features of intracranial atherosclerosis and to state current evidences regarding the validation of MR vessel wall imaging with histopathology.

Genomic Screening for Targets Regulated by Berberine in Breast Cancer Cells

Wen, Chun-Jie,Wu, Lan-Xiang,Fu, Li-Juan,Yu, Jing,Zhang, Yi-Wen,Zhang, Xue,Zhou, Hong-Hao Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10

Berberine, a common isoquinoline alkaloid, has been shown to possess anti-cancer activities. However, the underlying molecular mechanisms are still not completely understood. In the current study, we investigated the effects of berberine on cell growth, colony formation, cell cycle distribution, and whether it improved the anticancer efficiency of cisplatin and doxorubicin in human breast cancer estrogen receptor positive (ER+) MCF-7 cells and estrogen receptor negative (ER-) MDA-MB-231 cells. Notably, berberine treatment significantly inhibited cell growth and colony formation in the two cell lines, berberine in combination with cisplatin exerting synergistic growth inhibitory effects. Accompanied by decreased growth, berberine induced G1 phase arrest in MCF-7 but not MDA-MB-231 cells. To provide a more detailed understanding of the mechanisms of action of berberine, we performed genome-wide expression profiling of berberine-treated cells using cDNA microarrays. This revealed that there were 3,397 and 2,706 genes regulated by berberine in MCF-7 and MDA-MB-231 cells, respectively. Fene oncology (GO) analysis identified that many of the target genes were involved in regulation of the cell cycle, cell migration, apoptosis, and drug responses. To confirm the microarray data, qPCR analysis was conducted for 10 selected genes based on previously reported associations with breast cancer and GO analysis. In conclusion, berberine exhibits inhibitory effects on breast cancer cells proliferation, which is likely mediated by alteration of gene expression profiles.

Simultaneous desulfurization and denitrogenation of model fuels by polyethylene glycol-modified resorcinol/formaldehyde resin-derived carbon spheres

Jie Wen,Dongdong Zhao,Yingying Lu,Jing Huang,Yanping Li,Hui Zhang,Airong Li 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.7

A series of resorcinol/formaldehyde (RF) resin-derived carbon spheres modified by polyethylene glycol (PEG) were prepared. The effects of PEG addition time during hydrothermal treatment and molecular weight on the pore structure, surface acidic groups, particle size, and adsorption performances of the obtained spherical activated carbons were investigated. Two types of model fuel containing indole, quinoline, and dibenzothiophene (DBT) as target adsorbates were prepared to evaluate the adsorption performances of the spheres, which increased in the order of DBT<quinoline<indole. Hydrogen bonding may be critical in the removal of indole. Both the surface area and oxygen- containing functional groups influenced the adsorption capacity, with the latter significantly influenced by PEG addition time. PEG addition during the RF resin cross-linking stage sharply reduced the total concentration of acidic groups on the carbon sphere surfaces. The adsorption thermodynamics and kinetics of nitrogen and sulfur compounds were also investigated. The adsorption isotherms of all S/N species were of the Freundlich type at 25 oC. The pseudo-second-order rate equation well described the adsorption kinetics. Both external diffusion and intra-particle diffusion controlled the rate of adsorption.

Adaptive Neural Dynamic Surface Control for a General Class of Stochastic Nonlinear Systems with Time Delays and Input Dead-zone

Wen-Jie Si,Xun-De Dong,Fei-Fei Yang 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.5

This paper investigates adaptive tracking control for a more general class of stochastic nonlinear timedelaysystems with unknown input dead-zone. For the considered system, the drift and diffusion terms containtime-delay state variables. In control design, Lyapunov-Krasovskii functionals are employed to handle unknowntime-delay terms. Then, unknown nonlinear functions are approximated by RBF neural networks, and the dynamicsurface control (DSC) technique is utilized to avoid the problem of explosion of complexity. At last, based onthe Lyapunov stability theory, a robust adaptive controller is designed to guarantee that all closed-loop signals arebounded in probability and the tracking error converges to a small neighborhood of the origin. The simulationexample is presented to further show the effectiveness of the proposed approach.