17 results on '"Zhi-Chao Jia"'
Search Results
2. Morphology of a grass‐feeding white grub Apogonia cupreoviridis (Coleoptera: Scarabaeidae: Melolonthinae: Diplotaxini) using scanning electron microscopy
- Author
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Zhi‐Chao Jia, Hui Dong, Yu‐Tao Li, Xiu‐Xiang Zhao, and Lu Jiang
- Subjects
Animal Science and Zoology ,Cell Biology ,Ecology, Evolution, Behavior and Systematics - Published
- 2023
3. Application of micromachined quartz tuning fork resonator for temperature sensing.
- Author
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Xin Li, Jing Ma, Hai-bo Xu, and Zhi-chao Jia
- Published
- 2013
- Full Text
- View/download PDF
4. Comparative morphology between the white grubs Pseudosymmachia tumidifrons and Brahmina faldermanni (Coleoptera: Scarabaeidae: Melolonthinae) using scanning electron microscopy
- Author
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Chang Lu, Zhi-Chao Jia, Ru-Jun Zhou, and Lu Jiang
- Subjects
0106 biological sciences ,Scarabaeidae ,Larva ,Scanning electron microscope ,010607 zoology ,Zoology ,Seta ,Biology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Melolonthinae ,Functional diversity ,Animal Science and Zoology ,Taxonomy (biology) - Abstract
Melolonthinae are the largest group of scarab beetles, causing destructive damage to human economy for the larvae attacking a wide variety of crops, pastures and turfs. Rhizotrogina are one of the most specious groups, with their larval taxonomy far from satisfactory. In this study, the larvae of Pseudosymmachia tumidifrons and Brahmina faldermanni were studied through rearing and direct observations using light and scanning electron microscopy. The larvae share the following morphological characters: three pairs clypeal setae, six minute sensilla on haptomerum, and absence of any stridulatory structures on mandibles. The larvae also exhibit distinct morphological differences, such as the number of heli, presence or absence of proplegmatia, size arrangement of spiracles, and the arrangement of palidia on raster. The dramatically morphological differences between these two closely related genera indicate the heterogeneity of the subtribe Rhizotrogina. The morphological and functional diversity of raster were briefly discussed.
- Published
- 2020
5. Morphological description of the third instar larva of Lasiotrichius succinctus hananoi (Sawada) (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini), using scanning electron microscopy
- Author
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Zhi-Chao Jia, Lu Jiang, and Xu-Ming Dong
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Scarabaeidae ,Larva ,Histology ,biology ,Mandible (insect mouthpart) ,Zoology ,030206 dentistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Coleoptera ,Lasiotrichius succinctus ,03 medical and health sciences ,Medical Laboratory Technology ,0302 clinical medicine ,Microscopy, Electron, Scanning ,Animals ,Instar ,Trichiini ,Anatomy ,0210 nano-technology ,Instrumentation ,Lasiotrichius - Abstract
Cetoniinae is one of the showiest scarab groups, exhibiting bright-metallic body colors, and usually attract great attention from entomologists and amateur collectors. Larvae of Cetoniinae show dramatically diversity on morphology and living habits. Although being considered one of the best-studied groups of Scarabaeidae, larvae have been described for less than 5% species to the known Cetoniinae. In this study, the final instar larva of Lasiotrichius succinctus hananoi was described using scanning electron microscopy. The larvae are peculiar for bearing a haptomeral process dividing 10 spines into two groups: six on the left side, four on the right side, different from the previous descriptions on L. succinctus (Pallas, 1781). The morphological differences under SEM imply the further requirement of taxonomic revision in Lasiotrichius. Both advantage and disadvantage of SEM utilizing in larval descriptions were briefly discussed.
- Published
- 2020
6. Morphological description of the white grub Melolontha incana (Coleoptera: Scarabaeidae: Melolonthinae: Melolonthini)
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Zhi-Chao Jia, Hong Fang, and Lu Jiang
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Scarabaeidae ,Histology ,biology ,fungi ,Melolontha ,Fossorial ,Zoology ,Seta ,Stridulation ,030206 dentistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Melolonthinae ,Coleoptera ,03 medical and health sciences ,Medical Laboratory Technology ,0302 clinical medicine ,Larva ,Animals ,Taxonomy (biology) ,PEST analysis ,Anatomy ,0210 nano-technology ,Instrumentation - Abstract
Melolonthinae are the largest subfamily of Scarabaeidae, considered as serious pests for their larvae attacking plant roots and tubers. The edaphic larvae are difficult to be identified because the study on larval taxonomy is far from satisfactory. In this study, multivoltine white grubs Melolontha incana (Motschulsky, 1853) were investigated using light and scanning electron microscopy, in order to provide more morphological characters for the pest identification. The white grubs are atypical for the epipharynx bearing 14 heli arranged in two rows; the mandible is furnished with a patch of minute granules; the maxilla is equipped with 18 acute stridulatory teeth arranged in line; each femur and tibiotarsus is furnished ventrally with a cluster of fossorial setae. The morphological comparisons with the other melolonthine species were provided. The adaptative relationship between the morphological feature and the multivoltine life history were briefly discussed.
- Published
- 2020
7. Multifunctional bimetallic MOF with oxygen vacancy synthesized by microplasma for rapid total antioxidant capacity assessment in agricultural products
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Yi Xia, Juan He, Long Tang, Miao Hu, Jie Zhou, Yao-Yu Xiao, Zhi-Chao Jiang, and Xue Jiang
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Bimetallic MOF ,Microplasma ,Multiple enzyme activities ,Total antioxidant capacity ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
The assessment of total antioxidant capacity (TAC) is crucial for evaluating overall antioxidant potential, predicting the risk of chronic diseases, guiding dietary and nutritional interventions, and studying the effectiveness of antioxidants. However, achieving rapid TAC assessment with high sensitivity and stability remains a challenge. In this study, Ce/Fe-MOF with abundant oxygen vacancies was synthesized using microplasma for TAC determination. The microplasma synthesis method was rapid (30 min) and cost-effective. The presence of oxygen vacancies and the collaboration between iron and cerium in Ce/Fe-MOF not only enhanced the catalyst's efficiency but also conferred multiple enzyme-like properties: peroxidase-like, oxidase-like, and superoxide dismutase mimetic activities. Consequently, a simple colorimetric assay was established for TAC determination in vegetables and fruits, featuring a short analysis time of 15 min, a good linear range of 5–60 μM, a low detection limit of 1.3 μM and a good recovery of 91 %-107 %. This method holds promise for rapid TAC assessment in agricultural products.
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- 2024
- Full Text
- View/download PDF
8. Description of the third instar larva of the stag beetle Prismognathus dauricus Motschulsky, 1860 (Coleoptera: Scarabaeoidea: Lucanidae) using electron microscopy
- Author
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Zong-Fei Qu, Lu Jiang, and Zhi-Chao Jia
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010302 applied physics ,Claw ,Larva ,biology ,Stag beetle ,General Physics and Astronomy ,Seta ,02 engineering and technology ,Cell Biology ,Scarabaeoidea ,Anatomy ,021001 nanoscience & nanotechnology ,biology.organism_classification ,01 natural sciences ,Arthropod mouthparts ,Spiracle ,Structural Biology ,0103 physical sciences ,Instar ,General Materials Science ,0210 nano-technology - Abstract
Lucanidae have long received great attention for their adults. However, differentiating between the larvae of stag beetles is difficult and remains unsatisfactorily resolved due to the microscopic features separating groups. In the current study, the larvae of Prismognathus dauricus Motschulsky, 1860 were investigated using light and scanning electron microscopy. The larvae of P. dauricus are atypical for the following characters: i) the epipharynx possesses anteriorly eleven protophoba arranged in a semi-round line; ii) the par stridens consists of 31 ± 0.7 (N = 10) subconical teeth arranged in a slightly curved, longitudinal row; iii) the plectrum is composed of 60 ± 1.4 (N = 10) carinae; iv) the claws of thoracic legs are apically blunt and bear four setae. Moreover, the size arrangement of the larval spiracles also provides valuable taxonomic information. Our SEM study reveals larval ultramorphological characters useful for identification of this species for the first time.
- Published
- 2018
9. Tissue factor/activated factor VIIa induces matrix metalloproteinase-7 expression through activation of c-Fos via ERK1/2 and p38 MAPK signaling pathways in human colon cancer cell
- Author
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Zhi-Chao Jia, Xin Wang, Yuan-lian Wan, Jing Zhu, Jianqiang Tang, Yun Dai, and Yucun Liu
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Pathology ,medicine.medical_specialty ,Time Factors ,MAP Kinase Signaling System ,Proto-Oncogene Proteins c-jun ,Colorectal cancer ,Cell ,Factor VIIa ,Matrix metalloproteinase ,p38 Mitogen-Activated Protein Kinases ,c-Fos ,Thromboplastin ,Metastasis ,Tissue factor ,Cell Line, Tumor ,medicine ,Humans ,Neoplasm Invasiveness ,Extracellular Signal-Regulated MAP Kinases ,Promoter Regions, Genetic ,Regulation of gene expression ,Binding Sites ,biology ,business.industry ,Gastroenterology ,medicine.disease ,Up-Regulation ,Enzyme Activation ,Gene Expression Regulation, Neoplastic ,Transcription Factor AP-1 ,medicine.anatomical_structure ,Cell culture ,Matrix Metalloproteinase 7 ,Colonic Neoplasms ,biology.protein ,Cancer research ,business ,Proto-Oncogene Proteins c-fos ,Protein Binding - Abstract
Increased expression of tissue factor (TF) is associated with tumor invasion and metastasis in human colorectal cancer. We have previously observed that TF/FVIIa upregulates matrix metalloproteinase-7 (MMP-7) expression at the transcriptional level in colon cancer cells. MMP-7 overexpression is believed to play an important role in tumor invasion and metastasis. The aim of this study is to elucidate the molecular mechanisms by which TF/FVIIa induced MMP-7 expression and cell invasion in vitro.Reverse transcription polymerase chain reaction, Western blot, luciferase assay, and chromatin immunoprecipitation (ChIP) were used to determine the potential mechanism and signaling pathways by which TF/FVIIa induced MMP-7 expression and cell invasion in LoVo cells. Small interfering RNA (siRNA) and cell invasion assay was used to examine whether blocking c-Fos expression could abolish FVIIa-mediated upregulation of MMP-7 and cell invasion in vitro.The results showed that FVIIa induced the upregulation of MMP-7 both at the mRNA and protein levels in a time- and dose-dependent manner and increased the invasive behavior of LoVo cells. FVIIa enhanced the promoter activity of MMP-7, and the activator protein-1 (AP-1) binding site was responsible for the activation. Site mutation of the AP-1 binding site in the promoter almost completely abolished FVIIa-mediated response. Furthermore, ChIP assay confirmed that FVIIa promoted the direct binding of c-Fos with the MMP-7 promoter in vivo. FVIIa also induced the expression and nuclear accumulation of the AP-1 subunit c-Fos. siRNA-mediated knockdown of c-Fos eliminated FVIIa-stimulated MMP-7 expression and cell migration in vitro. In addition, selective mitogen-activated protein kinase (MAPK) kinase (MEK1/2) inhibitor (PD98059) and p38 MAPK inhibitor SB203580 suppressed MMP-7 upregulation induced by FVIIa.Our data suggest that a novel TF/FVIIa/MAPK/c-Fos/MMP-7 axis plays an important role in modulating the invasion of colon cancer cells and blockage of this pathway holds promise to treat colon cancer metastasis.
- Published
- 2011
10. Nonlinear Finite Element Analysis on Frame Joints of Steel Truss SRC Beam
- Author
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Zhi Heng Deng, Guang Xian Tang, Zhi Chao Jia, and He Yong Lu
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Materials science ,business.industry ,fungi ,General Engineering ,Truss ,Structural engineering ,Finite element method ,Cross section (physics) ,Brittleness ,Bearing capacity ,Composite material ,business ,Ductility ,Joint (geology) ,Beam (structure) - Abstract
To understand mechanical characteristics of frame joints of steel truss SRC beam, the accuracy of the proposed method is proved by the comparison between FEA result and test result, considering different steel ratios, cross flank rods and axial loads as well as plastic model of concrete damage. The result indicates that cross section and steel can delay joint damage and improve the bearing capacity, and that axial load can improve joints shear capacity to some extent but joints ductility is decreased, and that constraint of steel to concrete improves brittleness character caused by bad ductility of concrete.
- Published
- 2011
11. Design Optimisation for Cable Dome Structures Based on Progressive Collapse Resistance
- Author
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Lian-Meng Chen, Sun-Kai Yan, Zhi-Chao Jiang, Kai-Yu Huang, Ze-Bin Li, Wei Li, Yi-Yi Zhou, and Shi-Lin Dong
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cable dome ,flexible structures ,structural robustness ,parameter analysis ,optimal design ,genetic algorithm ,Building construction ,TH1-9745 - Abstract
This study proposed a framework of optimal design for flexible cable dome structures based on progressive collapse resistance. First, a quantitative evaluation method for nonlinear robustness based on robustness control theory to reflect the structural progressive collapse resistance was proposed. Second, an actual engineering structure was used as a case study to evaluate the effects of design parameters on structural robustness. Finally, a genetic algorithm was used as an optimisation algorithm to further optimise the element cross-section and the structural shape and obtain a combined optimisation rate. The results indicated that increasing the element cross-sectional area, decreasing the structural span, and increasing the rise-to-span ratio effectively improved the structural robustness. The structural robustness was also effectively improved through the optimal design of element cross-sections by increasing element cross-sections sensitive to structural robustness and decreasing those insensitive to structural robustness. In this study, the combined optimisation rate was 38.27%, which was not only greater than the individual optimisation rates of 11.2% for element cross-sectional area optimisation and 22.5% for structural shape optimisation but also the sum of these two rates.
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- 2023
- Full Text
- View/download PDF
12. Application of micromachined quartz tuning fork resonator for temperature sensing
- Author
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Zhi-chao Jia, Jing Ma, Hai-bo Xu, and Xin Li
- Subjects
Materials science ,business.industry ,Analytical chemistry ,Capacitance ,Temperature measurement ,Vibration ,Surface micromachining ,Resonator ,visual_art ,Electronic component ,visual_art.visual_art_medium ,Optoelectronics ,business ,Sensitivity (electronics) ,Quartz - Abstract
This article describes a micromachined quartz tuning fork resonator, 6 mm in height by 2 mm in diamter, holding a two-terminal electronic component with a nomial frequency of 36 kHz (at zero degree) and 15 pF typical capacitance packed in a 90 Pa He gas sealed metal container, which has been used as a sensor for temperature measurement with good sensitivity, repeatability and reliability. The temperature sensor is ZYtw-cut-quartz crystal bulk acoustic wave resonator vibrating in a flexural mode. Finite element method is used to analyze the vibratory modes and optimize the structure of the sensor. Design and performance analysis of the quartz tuning fork temperature sensor has been conducted. The sensor prototype was successfully fabricated and calibrated in operation from 0°C to 100°C with sensitivity of 80 ppm/°C.
- Published
- 2013
13. Extrahepatic synthesis of coagulation factor VII by colorectal cancer cells promotes tumor invasion and metastasis
- Author
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Jian-Qiang, Tang, Qing, Fan, Wen-Han, Wu, Zhi-Chao, Jia, Hui, Li, Yin-Mo, Yang, Yu-Cun, Liu, and Yuan-Lian, Wan
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Adult ,Aged, 80 and over ,Male ,Liver Neoplasms ,Factor VII ,Middle Aged ,Immunohistochemistry ,Thromboplastin ,Matrix Metalloproteinase 9 ,Cell Movement ,Cell Line, Tumor ,Humans ,Matrix Metalloproteinase 2 ,Female ,Neoplasm Invasiveness ,RNA, Messenger ,Colorectal Neoplasms ,Aged ,Neoplasm Staging - Abstract
Blood coagulation factor VII (FVII) is physiologically synthesized in the liver and released into the blood. Binding of FVII to tissue factor (TF) is related to the metastatic potential of tumor cells, also a significant risk factor in the development of hepatic metastasis in patients with colorectal cancer (CRC). It has been found that some cancer cells can produce FVII extrahepatically. However, little is known about FVII and CRC. We therefore hypothesized that CRC cells may synthese FVII, leading to tumor invasion and metastasis.We detected the expression of FVII protein in 55 CRC specimens by immunohistochemical staining. The FVII mRNA in 45 of 55 CRC cases, 6 colon cancer cell lines and one hepatoma cell line was measured by real-time reverse transcription-PCR (RT-PCR). Transwell invasion assays were performed to evaluate the changes of cell migration and invasion of LoVo cancer cells in vitro. We further observed the likely effectors regulated by the TF/FVIIa complex Western blotting assay.Extrahepatic synthesis of FVII was detected in the cytoplasm of 32 (58.2%) CRC specimens by immunohistochemistry, but not in normal mucosa. Liver metastasis (P = 0.003) and TNM staging (P = 0.005) were significantly correlated with FVII antigen expression. The positive ratios in stages I, II, III and IV were 33.3%, 40.0%, 52.4% and 87.5%, respectively. The expression of FVII mRNA in CRC with hepatic metastasis was significantly higher than CRC without hepatic metastasis (5.33 ± 2.88 vs. 1.47 ± 0.51, P = 0.03). Ectopic FVIIa induced a slight increase (1.34-fold) in the number of migrating cells, which was inhibited by the specific TF antibody. The formation of TF/FVIIa complex resulted in a marked increase in the expression of matrix metalloproteinases (MMP)-2 (3.5-fold) and MMP-9 (4.7-fold) in a time-dependent and dose-dependent manner.Extrahepatic synthesis of FVII by CRC cells may promote tumor invasion and metastasis. MMPs, as downstream effectors of TF/FVIIa signaling, facilitate the development of metastasis in colon cancer.
- Published
- 2011
14. Desynchronized liquid crystalline network actuators with deformation reversal capability
- Author
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Yao-Yu Xiao, Zhi-Chao Jiang, Jun-Bo Hou, and Yue Zhao
- Subjects
Science - Abstract
Liquid crystalline network (LCN) actuators switch reversibly between two states. Here, the authors report an asymmetrically processed LCN actuator which allows desynchronized actuation between three states using light and thermal stimuli.
- Published
- 2021
- Full Text
- View/download PDF
15. Can Gastric Cancer Patients with High Mandard Score Benefit from Neoadjuvant Chemotherapy?
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Wen-Zhe Kang, Bing-Zhi Wang, Deng-Feng Li, Zhi-Chao Jiang, Jian-Ping Xiong, Yang Li, Peng Jin, Xin-Xin Shao, Hai-Tao Hu, and Yan-Tao Tian
- Subjects
Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
A high Mandard score may indicate the tumor is insensitive to chemotherapy. We analyzed tumor regression and lymph node response under different Mandard scores to assess the impact of Mandard score on prognosis. Methods. Mandard scores and ypN stage of postoperative pathological reports were recorded. The results were reviewed by a professional pathologist. The radiologist compared the tumor regression before and after chemotherapy by computed tomography (CT). The survival of all patients was obtained by telephone follow-up. Multivariate Cox regression was used to assess the relationship between overall risk of death and Mandard score, imaging evaluation, and ypN stage. Results. In the Mandard score (4-5) group, the median survival time for PR and ypN0 patients was 68.5 and 76.7 months. While in the Mandard score (1-2) group, the median survival time for PD and ypN3a patients was 15.6 and 14.5 months. Imaging evaluation of tumor regression (PR 68.5 months, SD 27.8 months, and PD 10.2 months) and lymph node remission (ypN0 76.7 months, ypN1 61.6 months, ypN2 18.0 months, ypN3a 18.7 months, and ypN3b 18.3 months) showed improved survival. Mandard score, imaging evaluation, and ypN stage are important prognostic factors affecting prognosis. Conclusion. A high Mandard score does not mean neoadjuvant chemotherapy is ineffective in gastric cancer. Patients with imaging evaluation of tumor regression and ypN stage reduction may benefit from neoadjuvant chemotherapy.
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- 2022
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16. Slip on the surface of silicon wafers under laser irradiation: Scale effect.
- Author
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Zhi-Chao Jia, Ze-Wen Li, Jie Zhou, and Xiao-Wu Ni
- Subjects
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SILICON wafers , *SEMICONDUCTOR doping , *SURFACE phenomenon , *STACKING faults (Crystals) , *LASER spectroscopy - Abstract
The slip mechanism on the surface of silicon wafers under laser irradiation was studied by numerical simulations and experiments. Firstly, the slip was explained by an analysis of the generalized stacking fault energy and the associated restoring forces. Activation of unexpected {110} slip planes was predicted to be a surface phenomenon. Experimentally, {110} slip planes were activated by changing doping concentrations of wafers and laser parameters respectively. Slip planes were {110} when slipping started within several atomic layers under the surface and turned into {111} with deeper slip. The scale effect was shown to be an intrinsic property of silicon. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
17. Analysis of melt ejection during long pulsed laser drilling.
- Author
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Ting-Zhong Zhang, Zhi-Chao Jia, Hai-Chao Cui, De-Hua Zhu, Xiao-Wu Ni, and Jian Lu
- Subjects
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LASER drilling , *MELTING , *COMPUTER simulation , *OPTICAL microscopes , *SURFACE morphology - Abstract
In pulsed laser drilling, melt ejection greatly influences the keyhole shape and its quality as well, but its mechanism has not been well understood. In this paper, numerical simulation and experimental investigations based on 304 stainless steel and aluminum targets are performed to study the effects of material parameters on melt ejection. The numerical method is employed to predict the temperatures, velocity fields in the solid, liquid, and vapour front, and melt pool dynamics of targets as well. The experimental methods include the shadow-graphic technique, weight method, and optical microscope imaging, which are applied to real-time observations of melt ejection phenomena, measurements of collected melt and changes of target mass, observations of surface morphology and the cross-section of the keyhole, respectively. Numerical and experimental results show that the metallic material with high thermal diffusivity like aluminum is prone to have a thick liquid zone and a large quantity of melt ejection. Additionally, to the best of our knowledge, the liquid zone is used to illustrate the relations between melt ejection and material thermal diffusivity for the first time. The research result in this paper is useful for manufacturing optimization and quality control in laser-material interaction. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
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