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| 1 | Do anogenital gland secretionsof giant panda code for their sexual ability?显示文摘To test the hypothesis of whether ano- genital gland secretions (AGS) of giant panda code for their sexual ability, we collected AGS samples of 11 male (5 adult and 6 subadult) and 14 female (7 adult and 7 subadult) captive giant pandas (Ailuro- poda melanoleuca) from China Research and Con- servation Center for the Giant Panda at Wolong, Si- chuan, China from 1994 to 2002. The samples were analyzed by GC and GC-MS. The GC results showed that male and female pandas shared 20 constituents with equal capacity factors in the AGS. Further GC-MS analyses showed that there were a total of 95 compounds in the AGS. Nine constituents for the males and three for the females differed significantly in relative abundances between sexually active and inactive individuals, but no clear division between sexually active and inactive pandas by hierarchical cluster analyses on the relative abundances of a subset of 56 compounds. However, we were able to separate different age groups of male pandas by the constituents of AGS. 14 compounds were found sig- nificantly and negatively, and 8 compounds positively, correlated with pandas’ age by year. Our results suggest that the information contained in the AGS of panda might not code for pandas’ sexual ability but might for their age. These results will be valuable for captive breeding and conservation in the wild. | LIU Dingzhen YUAN Hong TIAN Hong WEI Rongping ZHANG Guiquan SUN Lixing WANG Liwen SUN Ruyong | 2006 | Chinese Science Bulletin2006，51，16： | 7 |
| 2 | Male panda (Ailuropoda melanoleuca) urine contains kinship information显示文摘Chemical communication plays an important role in kin selection and mate choice in mammals. The covariance of odor-genes of rodents has been documented and kinship odor has been proposed and termed, yet little is known of the relationship between genetic relatedness and chemical composition of kinship odors. Giant pandas (Ailuropoda melanoleuca) rely substantially on chemical communication to mediate their social interactions. To examine the relationship between genetic relatedness and compounds in the urine/anogenital gland secretions, we compared the similarities between genetic relatedness and the chemical profiles of anogenital gland secretions and urine via lineage construction and GC-MS (gas chromatography and mass spectrometry). We found that information about kinship odors was present only in the urine of male adults in the mating season but absent in the non-mating season. Adult females and all sub-adults did not have such kinship odors in either mating or non-mating season. Therefore, kinship odor in the panda was contingent on age, sex, and season. This is the first report about the condition-dependent expression of kinship odor, which may have a sig- nificant implication in the practice of panda conservation in relation to chemical communication and sexual selection. | LIU DingZhen WEI RongPing ZHANG GuiQuan YUAN Hong WANG ZhiPeng SUN Lixing ZHANG Jianxu ZHANG HeMin | 2008 | Chinese Science Bulletin2008，53，18： | 6 |
| 3 | Modeling and analyzing of botnet interactions 显示文摘 | SONG Lipeng JIN Zhen SUN Guiquan | 2011 | Physica A2011，390，2： | 1 |
| 4 | Influence of removable devices on computer worms: Dynamic analysis and control strategies 显示文摘 | SONG Lipeng JIN Zhen SUN Guiquan | 2011 | Computers and Mathematics with Applications2011，61，7： | 1 |
| 5 | Spatial dynamics of a vegetation model in an arid flat environment 显示文摘 | Sun Guiquan Li Li Wang Zike | 2013 | Non- linear Dynamics2013，73，4： | 1 |
| 6 | Stability and Hopf bifurcation in a delayed competition system显示文摘 | Jinzhu Zhang Zhen Jin Jurang Yan Guiquan Sun | 2009 | Nonlinear Anal2009，70，： | 1 |
| 7 | Global Dynamics of a Multi-group SEIR Epidemic Model with Infection Age显示文摘Consider the heterogeneity(e.g.,heterogeneous social behaviour,heterogeneity due to different geography,contrasting contact patterns and different numbers of sexual partners etc.)of host population,in this paper,the authors propose an infection age multigroup SEIR epidemic model.The model system also incorporates the feedback variables,where the infectivity of infected individuals may depend on the infection age.In the direction of mathematical analysis of model,the basic reproduction number R_0 has been computed.The global stability of disease-free equilibrium and endemic equilibrium have been established in the term of R_(0).More precisely,for R_(0)≤1,the disease-free equilibrium is globally asymptotically stable and for R_(0)>1,they establish global stability of endemic equilibrium using some graph theoretic techniques to Lyapunov function method.By considering a numerical example,they investigate the effects of infection age and feedback on the prevalence of the disease.Their result shows that feedback parameters have different and even opposite effects on different groups.However,by choosing an appropriate value of feedback parameters,the disease could be eradicated or maintained at endemic level.Besides,the infection age of infected individuals may also change the behaviour of the disease,global stable to damped oscillations or damped oscillations to global stable. | Vijay Pal BAJIYA Jai Prakash TRIPATHI Vipul KAKKAR Jinshan WANG Guiquan SUN | 2021 | Chinese Annals of Mathematics,Series B2021，42，6： | 1 |
| 8 | Modeling and analyzing of botnet interactions 显示文摘 | Song Lipeng Jin Zhen Sun Guiquan | 2011 | Physica A2011，390，2： | 1 |
| 9 | Influence of removable devices on computer worms: dynamic analysis and control strategies显示文摘 | Song Lipeng Jin Zhen Sun Guiquan | 2011 | Computers and Mathematics with Applications2011，61，7： | 1 |
| 10 | Influence of infection rate and migration on extinction of disease in spatial epidemics显示文摘 | Guiquan Sun Quanxing Liu Zhen Jin | 2010 | Journal of Theoretical Biology2010，264，： | 1 |
| 11 | Analysis of a multi-patch dynamical model about cattle brucellosis显示文摘The dissemination of cattle brucellosis in Zhejiang province of China can be attributed to the transport of cattle between cities within the province. In this paper,an n-patch dynamical model is proposed to study the effect of cattle dispersal on brucellosis spread. Theoretically,we analyze the dynamical behavior of the muti-patch model. For the 2-patch submodel,sensitivity analyses of the basic reproduction number R0 and the number of the infectious cattle in term of model parameters are carried out. By numerical analysis,it is obtained that the dispersal of susceptible cattle between patches and the centralization of infected cattle to the large scale patch can alleviate the epidemic and are in favor of the control of disease in the whole region. | Juan Zhang Shigui Ruan Guiquan Sun Xiangdong Sun Zhen Jin | 2014 | 上海师范大学学报(自然科学版)2014，43，5： | 1 |
| 12 | Potential Chemosignals in the Anogenital Gland Secretion of Giant Pandas, Ailuropoda melanoleuca, Associated with Sex and Individual Identity显示文摘 | Jian-Xu Zhang Dingzhen Liu Lixing Sun Rongping Wei Guiquan Zhang Honglin Wu Hemin Zhang Chenghua Zhao | 2008 | Journal of Chemical Ecology2008，，3： | 1 |
| 13 | Modeling and analyzing of botnet interactions显示文摘 | Song Lipeng Jin Zhen Sun Guiquan | 2011 | Physiea A2011，390，： | 1 |
| 14 | Dynamic behavior of discrete modifiedRicker~Beverton-Holtmodel显示文摘 | Sun Guiquan Zhang Guang Jin Zhen | 2009 | Computers and Mathematics with Applications2009，57，： | 1 |
| 15 | Unconventional metamagnetic phase transition in R_(2)In(R=Nd, Pr)with lambda-like specific heat and nonhysteresis显示文摘The phase transition of Nd_(2)In and Pr_(2)In has been studied and found to be between the first-order and second-order nature.Hardly any hysteresis nor obvious cell volume changes are presented.Concurrently the field-triggered metamagnetism is demonstrated with lambda-like peak on specific heat curve.For the field change of 7 T,giant magnetic entropy changes of 13.2 J kg^(-1)K^(-1) and 19.5 J kg^(-1)K^(-1) and adiabatic temperature changes of 6.5 K and 7.4 K have been achieved in Nd_(2)In and Pr_(2) In alloys respectively,which is partially contributed by strong magnetoelastic coupling represented by high saturation magnetostriction of~450 ppm.Such unique feature is proposed to be originated from the delocalized 5d electrons,as evidenced by the negative magnetoresistance caused by the phase transition. | Weibin Cui Guiquan Yao Shengyu Sun Qiang Wang Jie Zhu Sen Yang | 2022 | Journal of Materials Science & Technology2022，，6： | 0 |
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