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- 저자 : Wenquan Qin (검색결과 3 건)
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Wenquan Qin,Hongpeng Xiong,YuzhenWen,XiujunWen,HuiWang,Yihan Fang,TaoMa,Zhaohui Sun,Xiaoyang Chen,Cai Wang 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2
Baiting is widely applied for the detection and control of the red imported fire ants, Solenopsis invicta Buren. Adding preservatives into baits would prevent microbial contamination during production and storage, and might extend period of bait attractiveness in the field. However, it is not known if preservatives are repellent to S. invicta. In the present study, potential effects of six commonly used preservatives (potassiumsorbate, sodium benzoate, sodium diacetate, sodium dehydroacetate, calcium propionate, and nisin) on the foraging behaviors of S. invicta foragers were evaluated under laboratory and field conditions. Four-choice tests (laboratory study) showed that the number of foraging ants on the preservative-treated (immersed in 2000-, 5000-, or 10,000-ppm solution for 30 min) and control (immersed in distilled water for 30 min) food was similar, with an exception of sodium dehydroacetate, which significantly decreased the number of foraging ants at the three tested concentrations. Interestingly, 46%, 58% and 71% of the food items treated with 2000-, 5000- and 10,000- ppm solutions of sodium dehydroacetate were buried with soil particles, respectively, whereas only 17% of the control food was similarly buried. Multiple-choice tests (field study) showed that food treated with the 5000- or 10,000-ppm solution of sodium dehydroacetate attracted significantly fewer S. invicta workers compared to other preservatives and the controls. Our study showed that the use of sodiumdehydroacetate should be avoided during the production of aqueous-based or liquid baits against S. invicta.
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Huifang Wang,Shiping Liang,TaoMa,Qiang Xiao,Panrong Cao,Xuan Chen,Wenquan Qin,Hongpeng Xiong,Zhaohui Sun,XiujunWen,Cai Wang 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.2
Ectropis grisescens Warren (Lepidoptera: Geometridae) is an important defoliator pest of the tea plant, Camellia sinensis L. Our previous studies showed that E. grisescens pupae had significantly lower body water content when they pupated in the dry soil (20%-moisture) than those that pupated in the wetter soil (50%- or 80%-moisture). However, it is still unclear whether low-moisture conditions during pupating would further influence the physiological and fitness traits of adults. In the present study, E. grisescens individuals were allowed to pupate in 20%-, 50%- or 80%-moisture soil (silt loam), or in containers without soil (no-substrate conditions) in the laboratory. No significant difference in emergence was detected among different pupating conditions. However, female moths that emerged from 20%-moisture soil had significantly lower body water content compared to 80%-moisture soil, whereas the body water content of males was similar among the four treatments. The paired moths that emerged from 20%-moisture soil laid significantly fewer eggs than those that emerged from 50%- moisture soil. In addition, the number of hatched offerings (larvae) were significantly less when the adults previously pupated in no-soil containers compared to 50%-moisture soil. The longevity of adults was shortest when they emerged from 20%-moisture soil. Our study showed that the no-substrate and low-moisture conditions during pupating adversely affected E. grisescens adults.
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Amine, Khalil,Chen, Zonghai,Zhang, Z.,Liu, Jun,Lu, Wenquan,Qin, Yan,Lu, Jun,Curtis, Larry,Sun, Yang-Kook Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.44
<P>The performance degradation of graphite/Li<SUB>1.1</SUB>[Ni<SUB>1/3</SUB>Mn<SUB>1/3</SUB>Co<SUB>1/3</SUB>]<SUB>0.9</SUB>O<SUB>2</SUB> lithium-ion cells at elevated temperature was investigated. The electrochemical data suggest that the migration of dissolved transition metals from the cathode to the anode is the key contributor to the performance degradation. With the help of density function theory calculations, lithium difluoro[oxalato] borate was tested to be an effective electrolyte additive to mitigate the performance degradation of lithium-ion cells. The application of this novel electrolyte additive was found to significantly improve both the life and safety characteristics of graphite/Li<SUB>1.1</SUB>[Ni<SUB>1/3</SUB>Mn<SUB>1/3</SUB>Co<SUB>1/3</SUB>]<SUB>0.9</SUB>O<SUB>2</SUB> lithium-ion cells.</P> <P>Graphic Abstract</P><P>The performance degradation of graphite/Li<SUB>1.1</SUB>[Ni<SUB>1/3</SUB>Mn<SUB>1/3</SUB>Co<SUB>1/3</SUB>]<SUB>0.9</SUB>O<SUB>2</SUB> lithium-ion cells at elevated temperature was investigated. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm11584g'> </P>
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