In this paper, we analyze and compare nest composition and architecture as well as worker relatedness in three related species of slave-making ants： Rossomyrmex anatolicus, R. minuchae, and R. quandratinodum. Colony ...In this paper, we analyze and compare nest composition and architecture as well as worker relatedness in three related species of slave-making ants： Rossomyrmex anatolicus, R. minuchae, and R. quandratinodum. Colony structure within nests is an important trait in ants, especially in the case of mixed societies, when host and parasite coexist in the same nest. Data for their respective free-living hosts, Proformica korbi, P.. longiseta and P. sp., are also provided. For our study, we integrated a meticulous excava- tion procedure with a genetic method. We conclude that the average number of parasites, as well as of slaves, is species-specific, whereas nest depth depends on the nest archi- tecture of the host. The genus Rossomyrmex seems to be monogynous and monandrous, whereas Proformica shows differences in the number of queens and mating frequency. R. quandratinodum shows different traits in nest composition （host/parasite ratio： P/R） and architecture. The difference in traits may account for some differences in parasitism： raid process or avoidance of parasitism.展开更多
A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated tha...A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated that the three-dimensional interconnected carbon foam was successfully enhanced by the SiC nanowire network.As expected,the electromagnetic absorption performance of the as-prepared SiC nanowire reinforced carbon foam(SiC_(nw)/CF)was greatly improved by the introduction of the SiC nanowires.The SiC_(nw)/CF composite prepared with a lower concentration of Ni catalyst possessed an excellent microwave absorption property with the lowest reflection loss value of-36.31 dB with a matched thickness of 2.60 mm accompanied by the widest effective bandwidth of 4.52 dB.An increase in catalyst concentration degraded the electromagnetic absorption ability to a certain extent.A potential microwave absorption schematic diagram was finally proposed,and it stated that the SiC nanowire network played an essential role in the improvement of the electromagnetic absorption properties.展开更多
文摘In this paper, we analyze and compare nest composition and architecture as well as worker relatedness in three related species of slave-making ants： Rossomyrmex anatolicus, R. minuchae, and R. quandratinodum. Colony structure within nests is an important trait in ants, especially in the case of mixed societies, when host and parasite coexist in the same nest. Data for their respective free-living hosts, Proformica korbi, P.. longiseta and P. sp., are also provided. For our study, we integrated a meticulous excava- tion procedure with a genetic method. We conclude that the average number of parasites, as well as of slaves, is species-specific, whereas nest depth depends on the nest archi- tecture of the host. The genus Rossomyrmex seems to be monogynous and monandrous, whereas Proformica shows differences in the number of queens and mating frequency. R. quandratinodum shows different traits in nest composition （host/parasite ratio： P/R） and architecture. The difference in traits may account for some differences in parasitism： raid process or avoidance of parasitism.
基金supported by the National Natural Science Foundation of China[grant number 51772151,51761145103]the Nanjing University of Aeronautics and Astronautics PhD short-term visiting scholar project([2018]47)[grant number 190105DF06]the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘A double network nested foam composite with tunable electromagnetic wave absorption performance was fabricated via a carbonization,impregnation,and chemical vapor infiltration method.The research results indicated that the three-dimensional interconnected carbon foam was successfully enhanced by the SiC nanowire network.As expected,the electromagnetic absorption performance of the as-prepared SiC nanowire reinforced carbon foam(SiC_(nw)/CF)was greatly improved by the introduction of the SiC nanowires.The SiC_(nw)/CF composite prepared with a lower concentration of Ni catalyst possessed an excellent microwave absorption property with the lowest reflection loss value of-36.31 dB with a matched thickness of 2.60 mm accompanied by the widest effective bandwidth of 4.52 dB.An increase in catalyst concentration degraded the electromagnetic absorption ability to a certain extent.A potential microwave absorption schematic diagram was finally proposed,and it stated that the SiC nanowire network played an essential role in the improvement of the electromagnetic absorption properties.
