http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Xiaoqiong Li (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Transmission of symbiotic fungus with a nonsocial leaf-rolling weevil
Xiaoqiong Li,Wenfeng Guo,Yuanguang Wen,Manoj Kumar Solanki,Jianqing Ding 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.3
Transmission modes of symbionts with fungus-growing insects are closely related to the stability of symbioses. As compare to social fungus-farming insects, transmission modes of nonsocial fungus-farming insects need to be further investigated. Euops chinensis, a nonsocial leaf-rolling weevil, harbors a symbiotic fungus Penicillium herquei in the specialized mycangium. Previous works have indicated that P. herquei is cultivated to host plants by females during oviposition process, however, it is still unclear when (before or after oviposition) and how P. herquei is transmitted. In this study, we observed fungal cultivating behaviors and adult bodies by scanning electron microscopy (SEM), and compared isolation rates of P. herquei on ovary eggs, newly oviposited eggs, cradle leaves (leaf pieces cut before rolling cradles), cradles, and female mycangia. Fungal isolateswere identified by internal transcribed spacers (ITS) and cytochrome oxidase I (COI) genes.Wefound the female's serrated tarsi and comb-like setae on the abdomen were specialized structures for fungal transmission. Newly oviposited eggs showed 81.11% frequency of fungal symbionts, but ovary eggs did not showany growth of fungal symbionts. Isolation rates of P. herquei on cradle leaves, mycangia and cradles were 76.67%, 77.71% and 87.72%, respectively. Analyses of ITS and COI genes showed that isolated fungal strains belong to the same species. We concluded that P. herquei was transmitted before oviposition, and the female's tarsi are newly found specialized structures for fungal transmission. This study elucidates the cultivar transmission modewith fungus-farming attelabidweevils, and might be useful to study of other fungiculture mutualisms.
-
Li Zeng,Pengcheng Han,Tongyue Huang,Xiaoqiong He 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.5
A bidirectional-friendly control strategy of three-phase NPC rectifier under unbalanced voltage for advanced traction power supply system (ATPSS) is proposed in this study. Negative-sequence current and DC voltage ripple are restrained effectively with very low total harmonic distortions (THDs) on the basis of predictive current control theory. First, power balance equation containing only positive-sequence voltage of the three-phase grid voltage is derived, and the secondary fluctuation of instantaneous active and reactive powers on the grid side is analyzed and calculated. Second, expression of the DC-side voltage fluctuation is deduced to fix the calculation of Pref for the optimization of the control system. Third, command current that can achieve bidirectional-friendly control is calculated according to the power expression and the reference voltage value is obtained on the basis of the predictive current control principle. Finally, simulations and experimental results verify the correctness of the theoretical analysis and the effectiveness of the proposed strategy.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
