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- 저자 : Xiangdong Tao (검색결과 4 건)
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Sex pheromone of the jumping plant bug, Halticus minutus Reuter (Hemiptera: Miridae)
Tao Zhang,Xiaofang Zhang,Xiangdong Mei,Yaofa Li,Zhanlin Gao,Jun Ning 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2
The jumping plant bug, Halticusminutus Reuter, is a pest of sweet potatoes, soybeans and turfgrass in China. Here we present our analysis of the female-produced sex pheromone. These plant bugs release their sex pheromone, consisting hexyl acetate (HA), hexyl butyrate (HB) and (E)-4-oxo-2-hexenal (4-OHE), at night. These three components, tested individually, elicited strong antennal responses. Field tests indicated that a ternary blend of HA, HB and 4-OHE, at ratios of 1:16:10, effectively attractedmale H. minutus. Our dose-response analysis showed optimal male capture at the trap dose of 13.5mg/trap. Higher trap doses did not improve capture rates. Higher ratios of HB in the pheromone mix led to substantially reduced captures, fromwhich we infer that HBmay function as an alarm pheromone or defensive secretion. Pipette tips were used as long-term lures, and whose longevities were evaluated. Results showed effective duration of pipette tip lures were N5 weeks. Thus, we suggest that the pheromone-baited traps are economically viable tools for long-term monitoring and trapping of jumping plant bugs.
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Qiuyang Fu,Tao Wang,Yong Liang,Yong Lin,Xiangdong Zhao,Jian Wa,Suxiao Fa 대한이비인후과학회 2019 Clinical and Experimental Otorhinolaryngology Vol.12 No.1
Objectives. The energy consumption process of cochlea and neural signal transduction along the auditory pathway are highly dependent on blood oxygen supply. At present, it is under debate on whether the obstructive sleep apnea syndrome (OSAS) would affect the auditory function since the patients suffer from low oxygen saturation. Moreover, it is difficult to detect the functional state of auditory in less severe stage of OSAS. Recently, speech-evoked auditory brainstem response (speech-ABR) has been reported to be a new electrophysiological tool in characterizing the auditory dysfunction. The aim of the present study is to evaluate the auditory processes in adult patients with mild and moderate OSAS by speech-ABR. Methods. An experimental group of 31 patients with mild to moderate OSAS, and a control group without OSAS diagnosed by apnea hypopnea index in polysomnogram were recruited. All participants underwent otologic examinations and tests of pure-tone audiogram, distortion product otoacoustic emissions, click-evoked auditory brainstem response (click-ABR) and speech-ABR, respectively. Results. The results of pure-tone audiogram, distortion product otoacoustic emissions, and click-ABR in OSAS group showed no significant differences compared with the control group (P>0.05). Speech-ABRs for OSAS participants and controls showed similar morphological waveforms and typical peak structures. There were significant group differences for the onset and offset transient peaks (P<0.05), where OSAS group had longer latencies for peak V (6.69±0.33 ms vs. 6.39±0.23 ms), peak C (13.48±0.30 ms vs. 13.31±0.23 ms), and peak O (48.27±0.39 ms vs. 47.60±0.40 ms) compared to the control group. The latency of these peaks showed significant correlations with apnea hypopnea index for peak V (r=0.37, P=0.040), peak C (r=0.36, P=0.045), as well as peak O (r=0.55, P=0.001). Conclusion. These findings indicate that some auditory dysfunctions may be present in patients with mild and moderate OSAS, and the damages were aggravated with the severity of OSAS, whi
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Colonization study of gfp-tagged Achromobacter marplatensis strain in sugar beet
YingWu Shi,Chun Li,HongMei Yang,Tao Zhang,Yan Gao,Min Chu,Jun Zeng,Qing Lin,OuTiKuEr,YuGuo Li,Xiangdong Huo,Kai Lou 한국미생물학회 2017 The journal of microbiology Vol.55 No.4
This study details the introduction of a gfp marker into anendophytic bacterial strain (Achromobacter marplatensisstrain 17, isolated from sugar beet) to monitor its colonizationof sugar beet (Beta. vulgaris L.). Stability of the plasmidencoding the gfp was confirmed in vitro for at least 72 h ofbacterial growth and after the colonization of tissues, undernonselective conditions. The colonization was observed usingfluorescence microscopy and enumeration of culturableendophytes in inoculated sugar beet plants that grew for 10or 20 days. gfp-Expressing strains were re-isolated from theinner tissues of surface-sterilized roots and stems of inoculatedplants, and the survival of the Achromobacter marplatensis17:gfp strain in plants 20 days after inoculation, evenin the absence of selective pressure, suggests that it is goodcolonizer. These results also suggest that this strain could bea useful tool for the delivery of enzymes or other proteinsinto plants. In addition, the study highlights that sugar beetplants can be used effectively for detailed in vitro studies onthe interactions between A. marplatensis strain 17 and its host,particularly if a gfp-tagged strain of the pathogen is used.
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Zhengguo Gao,Qian Duan,Jinaying Liang,Xiangdong Tao,Yuan Cui,Toshifumi Satoh,Toyoji Kakuchi 한국고분자학회 2012 Macromolecular Research Vol.20 No.5
Zinc(II) tetra-(2-chloropropionylamido) phthalocyanine (TAPcCl) was synthesized as the initiator for atom transfer radical polymerization (ATRP). Using CuBr/tris(2-dimethylaminoethyl)amine as the catalyst system,ATRP of N-isopropylacrylamide (NIPAM) was performed to create a new star-shaped poly(N-isopropylacrylamide)(PNIPAM) with a zinc phthalocyanine core and PNIPAM arms (TAPc-PAM). The structures of the initiator and the polymers were characterized by means of Fourier transform infrared spectroscopy and proton nuclear magnetic resonance. The polydispersity index obtained by gel permeation chromatography indicated that the molecular weight distribution was narrow. The lower critical solution temperatures (LCST) for the TAPc-PAM aqueous solutions measured using the turbidimetry method were increased due to incorporation of the phthalocyanine core and decreased as molecular weight increased. TAPc-PAM possessed photocatalytic activity, a finding that was verified by Rhodamine B degradation in the presence of hydrogen peroxide under visible light. Moreover, the catalytic efficiency was higher at its LCST, which encouraged reuse of the photocatalyst.
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