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Chen Shunan,Li Mingtao,Liu Ji,Feng Ying,Yao Jun,Shi Lei,Chen Xiaoming 한국곤충학회 2021 Entomological Research Vol.51 No.10
Colors and chemicals are the most important cues for butterflies to localize mating partners and food. In this study, we used artificial flowers with different colors and plastic butterfly wing mimics to separate the impact of colors from other cues on foraging and courtship of the butterfly Papilio maackii. We found that males relied more on visual cues during foraging and courtship, but females responded more to olfactory signals. Males visited artificial flowers more frequently than females. However, when honey was applied on artificial flowers, the frequency of female’s flower visits increased and was much higher than that of male’s, suggesting that females may have stronger olfactory than visual senses. During courtship, females were passive, whereas males were very active in chasing females and driving away other males. Similar to courtship among butterflies in a natural population, males showed recognition ability to butterfly wing mimics, indicating that males could accurately identify mates using colors only without any chemical cues. We also analyzed volatiles and identified five types of male-specific chemicals while no female-specific chemicals were identified, suggesting that females might have used these male-specific volatiles to recognize and accepted males during courtship. Pollination of the plant Primula sieboldii mainly depends on P. maackii, and the plant has flowers with purple and mauve colors. Coincidently, P. maackii showed color preference to blue and purple, suggesting that the butterfly and plants might have coevolved during the long course of interactions.
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Ji Chen 아시아사회과학학회 2020 Jornal of Asia Social Science Vol.1 No.3
Since ancient times, China has been a unified multi-ethnic country. In the course of thousands of years of Chinese history, all ethnic groups have jointly opened up the vast territory of China, jointly written Chinese history, jointly created Chinese culture, and jointly formed the great spirit of the Chinese nation. In the more than 70 years since the founding of Chinese People’s Republic of China, the Communist Party of China has always treated ethnic equality as one of the fundamental principles of founding the country and established the system of regional ethnic autonomy. Since the 18th CPC National Congress, General Secretary Xi Jinping has proposed to “forge a strong sense of community among the Chinese people” as the main line of ethnic work in the new era, and to take the decisive battle to get rid of poverty as an important task, to enable people of all ethnic groups in the deep poverty-stricken areas of “three regions and three prefectures” (The “three regions” refers to Tibet, four prefectures of southern Xinjiang—Hotan, Aksu, Kashi, and the Kirgiz Autonomous Prefecture of Kizilsu, and the areas of Sichuan, Yunnan, Gansu, and Qinghai provinces with large Tibetan populations; the “three prefectures” are Liangshan in Sichuan, Nujiang in Yunnan, and Linxia in Gansu.)”to work with people of the whole country to build a moderately prosperous society in an all-round way and realize the great rejuvenation of the Chinese nation.
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Parameterization and Mapping of Solar Radiation in Data Sparse Regions
Ji-Long Chen,Guo-Sheng Li 한국기상학회 2012 Asia-Pacific Journal of Atmospheric Sciences Vol.48 No.4
Knowledge of temporal and spatial variation of solar radiation is essential for many applications. In this work, a simple and feasible procedure is conducted to map the daily solar radiation for Liaoning province, one of the most important agricultural areas in China, but with sparsely measured solar radiation data. The daily sunshine duration are interpolated to the whole area, subsequently,solar radiation are calculated by Ångström-Prescott model, the generic parameters of which are determined by least square to minimize the overall fitting residual between the ratio of actual to potential sunshine duration and the ratio of actual to extra-terrestrial solar radiation of the sites where solar radiation are available. In other local regions with sparse data, mapping of the solar radiation could be done following the simple procedure. In the present study area,using the interpolated daily sunshine duration data by ANUSPLIN,Ångström-Prescott model with the generic parameters (a = 0.505,and b = 0.204) returns reasonable results, with the overall RMSE of 2.255 MJ m−2, and RRMSE of 16.54%. The daily solar radiation varies between 5.26 in December and 22.74 MJ m−2 in May, and shows an obviously spatial variation which is mainly contributed to the climate and topography. The substitution of solar radiation from nearby station is preferred to estimation by Ångström-Prescott model if the distance between the stations falls below the threshold of 135 ± 15 km. The RMSE of such substitution increases by approximately 0.157 MJ m−2 per 10 km.
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RASAL1 Attenuates Gastric Carcinogenesis in Nude Mice by Blocking RAS/ERK Signaling
Chen, Hong,Zhao, Ji-Yi,Qian, Xu-Chen,Cheng, Zheng-Yuan,Liu, Yang,Wang, Zhi Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.3
Recent studies have suggested that the RAS protein activator like-1 (RASAL1) functions as a tumor suppressor in vitro and may play an important role in the development of gastric cancer. However, whether or not RASAL1 suppresses tumor growth in vivo remains to be determined. In the present study, we investigated the role of RASAL1 in gastric carcinogenesis using an in vivo xenograft model. A lentiviral RASAL1 expression vector was constructed and utilized to transfect the human poorly differentiated gastric adenocarcinoma cell line, BGC-823. RASAL1 expression levels were verified by quantitative real-time RT-PCR and Western blotting analysis. Then, we established the nude mice xenograft model using BGC-823 cells either over-expressing RASAL1 or normal. After three weeks, the results showed that the over-expression of RASAL1 led to a significant reduction in both tumor volume and weight compared with the other two control groups. Furthermore, in xenograft tissues the increased expression of RASAL1 in BGC-823 cells caused decreased expression of p-ERK1/2, a downstream moleculein the RAS/RAF/MEK/ERK signal pathway. These findings demonstrated that the over-expression of RASAL1 could inhibit the growth of gastric cancer by inactivation of the RAS/RAF/MEK/ERK pathway in vivo. This study indicates that RASAL1 may attenuate gastric carcinogenesis.
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On-Chip Spiral Inductors for RF Applications: An Overview
Ji Chen,Juin J. Liou 대한전자공학회 2004 Journal of semiconductor technology and science Vol.4 No.3
Passive components are indispensable in the design and development of microchips for high-frequency applications. Inductors in particular are used frequently in radio frequency (RF) Ie's such as low-noise amplifiers and oscillators. This paper gives a broad overview on the on-chip spiral inductors. The design concept and modeling approach of the typical square-shaped spiral inductor are first addressed. This is followed by the discussions of advanced structures for the enhancement of inductor performance. Research works reported in the literature are summarized to aid the understanding of the recent development of such devices.<br/>
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XPC 939A>C and 499C>T Polymorphisms and Skin Cancer Risk: a Meta-analysis
Ji, Geng,Lin, Yuan,Cao, Song-Yu,Li, Luo-Zhu,Chen, Xin-Long,Sun, Bu-Mei,Chen, Chuan-Jun,Ma, Hong-Xia Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.10
The xeroderma pigmentosum complementation group C gene (XPC) has been identified as important for repairing UV-related DNA damage. Some subtle changes in this gene may impair repair efficiency and influence susceptibility to human cancers, including skin cancer. Two polymorphisms in XPC, 939A>C (rs2228001) and 499C>T (rs2228000), are considered to have possible associations with the risk of skin cancer, but the reported results have been inconsistent. Here we performed a meta-analysis of the available evidence regarding the relationship between these two polymorphisms and the risk of skin cancer. All relevant studies were searched using PubMed, Embase and Web of Science before February 2012. A total of 8 case-control studies were included in this analysis, and no convincing associations between the two polymorphisms and risk of skin cancer were observed in any of the genetic models. Stratified analyses by skin cancer type also did not detect significant associations in any subgroup. This meta-analysis suggested that the XPC 939A>C and 499C>T polymorphisms may have little involvement in susceptibility to skin cancer.
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On-Chip Spiral Inductors for RF Applications: An Overview
Chen, Ji,Liou, Juin J. The Institute of Electronics and Information Engin 2004 Journal of semiconductor technology and science Vol.4 No.3
Passive components are indispensable in the design and development of microchips for high-frequency applications. Inductors in particular are used frequently in radio frequency (RF) IC's such as low-noise amplifiers and oscillators. This paper gives a broad overview on the on-chip spiral inductors. The design concept and modeling approach of the typical square-shaped spiral inductor are first addressed. This is followed by the discussions of advanced structures for the enhancement of inductor performance. Research works reported in the literature are summarized to aid the understanding of the recent development of such devices.
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Chen, How-Ji,Tsai, Wen-Po,Tang, Chao-Wei,Liu, Te-Hung Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.39 No.6
We have developed a lightweight aggregate (LWA) concrete made by expanding fine sediments dredged from the Shihmen Reservoir (Taiwan) with high heat. In this study, the performance of the concrete and of prestressed concrete beams made of the sedimentary LWA were tested and compared with those made of normal-weight concrete (NC). The test results show that the lightweight concrete (LWAC) exhibited comparable time-dependent properties (i.e., compressive strength, elastic modulus, drying shrinkage, and creep) as compared with the NC samples. In addition, the LWAC beams exhibited a smaller percentage of prestress loss compared with the NC beams. Moreover, on average, the LWAC beams could resist loading up to 96% of that of the NC beams, and the experimental strengths were greater than the nominal strengths calculated by the ACI Code method. This investigation thus established that sedimentary LWA can be recommended for structural concrete applications.
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