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RISS 인기검색어
- 검색키워드
- 저자 : Zhu Jiaan (검색결과 3 건)
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Cheng, Jiaan,Zhao, Weichun,Lou, Yonggen,Zhu, Zhengrong Korean Society of Applied Entomology 2001 Journal of Asia-Pacific Entomology Vol.4 No.1
Intra- and inters-specific effects of Nilaparvata lugnes (St l) and Sogtella furcifera (Horv th)(Homoptera: Delphacidae) on their population performances on Indica Zhe 852, Japonica XiuShui 11 and Hybrid XY 9308 were studied in the laboratory. Intra-specific crowding did not influence the performance of N. lugens except for emergence rate on Z 852, but adversely affected the nymphal development duration of X. furcifera on Xiushui 11 and XY 9308, and emergence rates, adult longevity and fecundity on Xiushui 11. The inter-specific interactions between the nymphs of N. lugens and S. furcifera provided positive effects for both the species, but more benefits to S. furcifera.The nymphal development duration, emergence rate and fecundity of S. furcifera raised in mixed cultures for all the three varieties were often significantly shorter or higher than those raised in pure cultures, but only the emergence rate and fecundity of N. lugens raised in mixed cultures. on Zhe 852 and XY9308 were higher than those raised in pure culture. Both species suffered little delayed negative intra-specific effects and gained dramatic delayed positive inter-specific effects from another species previously fed on the plants. The nymphal development duration, adult emergence rate, female longevity and fecundity of each species were positively affected when reared on the plants sucked by another species before. The change of distribution pattern of S. furcifera reared on the plants fed by BPH before revealed the positive effects from inter-specific.
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Wenwu Zhou,Xin Yuan,Ping Qian,Jiaan Cheng,Chuanxi Zhang,Geoff Gurr,Zengrong Zhu 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.4
Chemosensory proteins (CSP) afford insects the ability to recognize complicated environmental cues and are involved in diverse physiological processes. The planthoppers Laodelphax striatellus and Sogatella furcifera are serious specialist pests of rice throughout eastern Asia. In this study, we identified 21 putative CSP genes (namely LsCSP1–12 and SfCSP1–9) in the two planthoppers L. striatellus and S. furcifera, and profiled their transcript accumulation in different developmental stages and body parts by real-time quantitative PCR (qPCR). All CSPs had the characteristic typical features of the CSP family, with the exception of LsCSP10 and SfCSP2, which lacked the predicted signal peptide sequence. Among these putative CSP genes, only two (LsCSP9 and SfCSP5)weremore highly expressed in the antennae, indicating that they might be involved in olfaction. On the contrary, eleven genes (LsCSP2, 3, 4, 6, 8, 12; SfCSP1, 4, 6, 7, 8) and one gene (SfCSP9) were more highly expressed in the legs and heads (without antennae), respectively. The remainders of the genes were ubiquitously expressed in the heads (without antennae) and the bodies (without the legs and heads). The broad expression patterns in different body parts indicate that the CSPs of these two delphacid species may be involved in diverse functions besides chemosensation. These findings increase the understanding of the chemosensory protein system of Hemiptera species.
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Liu Feifei,Li Diancheng,Xin Yuwei,Liu Fang,Li Wenxue,Zhu Jiaan 대한영상의학회 2022 Korean Journal of Radiology Vol.23 No.2
Objective: Viscoelasticity is an essential feature of nerves, although little is known about their viscous properties. The discovery of shear wave dispersion (SWD) imaging has presented a new approach for the non-invasive evaluation of tissue viscosity. The present study investigated the feasibility of using SWD imaging to evaluate diabetic neuropathy using the sciatic nerve in a diabetic rat model. Materials and Methods: This study included 11 diabetic rats in the diabetic group and 12 healthy rats in the control group. Bilateral sciatic nerves were evaluated 3 months after treatment with streptozotocin. We measured the nerve cross-sectional area (CSA), nerve stiffness using shear wave elastography (SWE), and nerve viscosity using SWD imaging. The motor nerve conduction velocity (MNCV) was also measured. These four indicators and the histology of the sciatic nerves were then compared between the two groups. The performance of CSA, SWE, and SWD imaging in distinguishing the two groups was assessed using receiver operating characteristic (ROC) analysis. Results: Nerve CSA, stiffness, and viscosity in the diabetic group was significantly higher than those in the control group (all p < 0.05). The results also revealed a significantly lower MNCV in the diabetic group (p = 0.005). Additionally, the density of myelinated fibers was significantly lower in the diabetic group (p = 0.004). The average thickness of the myelin sheath was also lower in the diabetic group (p = 0.012). The area under the ROC curve for distinguishing the diabetic neuropathy group from the control group was 0.876 for SWD imaging, which was significantly greater than 0.677 for CSA (p = 0.030) and 0.705 for SWE (p = 0.035). Conclusion: Sciatic nerve viscosity measured using SWD imaging was significantly higher in diabetic rats. The viscosity measured using SWD imaging performed well in distinguishing the diabetic neuropathy group from the control group. Therefore, SWD imaging may be a promising method for the evaluation of diabetic neuropathy.
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