|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Trends of Urban Air Pollution in Zhengzhou City in 1996-2008显示文摘Urban air pollution is a commonly concerned environmental problem in the world.Identification of air quality trend using long-term monitoring data is helpful to understand the effectiveness of pollution control strategies.This study,using data from six monitoring stations in Zhengzhou City,analyzed the changing trend in concentrations of SO 2,NO x /NO 2 and TSP/PM 10 in 1996-2008,based on non-parametric Mann-Kendall test and Sen's slope estimator,and evaluated the comprehensive air pollution level using Multi-Pollutant Index(MPI).It was found that the concentration of each pollutant exceeded obviously the World Health Organization(WHO) guideline value,but the changing trend varied:SO 2 and NO 2 were significantly increased mainly due to an increase in coal consumption and vehicle number,while NO x,TSP and PM 10 decreased.The air pollution was serious,and differed markedly among the three functional regions:it is the most severe in the Industrial and Residential Area(IRA),followed by the Transportation Hub and Business District(THBD),and then the High-tech,Cultural and Educational Area(HCEA).Different from NO 2 concentration that had a similar change trend/rate among the function regions,the change rate of PM 10 concentration differed spatially,decreased much more obviously in THBD than other two regions.For the whole city,the comprehensive air pollution level declined gradually,illustrating that the air quality in Zhengzhou was improved in the last decade. | DU Xile LU Changhe WANG Hairong MA Jianhua | 2012 | Chinese Geographical Science2012，22，4： | 6 |
| 2 | Human amniotic epithelial cell feeder layers maintain mouse embryonic stem cell pluripotency via epigenetic regulation of the c-Myc promoter显示文摘老鼠胚胎的干细胞(转换字符) 在老鼠的 feeder 层上典型地是有教养的胚胎的成纤维细胞(MEF ) ,与白血病,禁止的因素(LIF ) 增加了处于一个无差别的状态维持他们。我们以前证明了人的羊膜的上皮的房间(hAECs ) 能被用作 feeder 房间维持老鼠转换字符 pluripotency,但是为这的机制是未知的。在现在的学习,我们发现那 CpG 5 c-Myc 基因仍然是的岛在在 hAECs 上有教养的老鼠转换字符的 hypomethylated。另外,在 c-Myc 基因倡导者 histone H3 的 acetylation 和 histone H3K4 的 trimethylation 铺平比在在 MEF 上有教养的 ES 房间的那些在在 hAECs 上有教养的 ES 房间是更高的。这些数据建议 hAECs 能经由 c-Myc 的 epigenetic 修正改变鼠标转换字符基因表示,提供为处于一个无差别的状态的转换字符的导致 hAEC 的维护的可能的机制。 | Te Liu Weiwei Cheng Tianjin Liu Lihe Guo Qin Huang Lizhen Jiang Xiling Du Fuhui Xu Zhixue Liu Dongmei Lai | 2010 | Acta Biochimica et Biophysica Sinica2010，42，2： | 6 |
| 3 | Evaluation and Trend Analysis of Surface Water Quality in Zhengzhou in 1998-2008显示文摘Water pollution is one of the major environmental problems,especially in urban areas.Due to rapid urban expansion and industrialization,water pollution in Zhengzhou City,the capital of Henan Province in central China has become a serious problem for its development.In this study,the surface water quality was evaluated using Nemerow Comprehensive Pollution Index (NCPI),and the change trend was calculated using methods of Mann-Kendall test and Sen's slope estimator,based on the monitoring data from 1998 to 2008.The results show that the NCPI ranged from 3 to 50 in 70% of the monitoring cases,implying that most rivers were seriously polluted.However,this serious polltuon is expected to be gradually improved,as the concentration of water pollutants and NCPI declined significantly in most rivers.Water pollution in reservoirs was much lower than rivers,and the NCPI in the three monitored reservoirs was lower than 3 in most years,and shows a downward trend.Although the surface water quality was gradually improved,great efforts are still needed to enhance the protection and improvement of surface water environment. | Du Xile Lu Changhe | 2012 | Chinese Journal of Population,Resources and Environment2012，10，4： | 1 |
| 4 | Expression of the orexigenic peptide Ghrelin in the sheep ovary 显示文摘 | Du C Xiling aowa Cao G | 2009 | Domest Anita Endocrinol2009，36，2： | 1 |
| 5 | Photofragment translational spectroscopy of ICl near 304 and 280 nm: Observation of an intense hot band effect显示文摘The photodissociation dynamics of ICl has been studied near 304 and 280 nm on a simple miniature time of flight (mini-TOF) photofragment translational spectrometer with a short pulse of a weak acceleration field. An intense hot band effect was observed. Many small peaks were resolved in each photofragment translational spectrum (PTS). Based on simulations, the principal peaks were assigned not only to the different photodissociation channels (1) I + Cl, (2) I + Cl*, (3) I* + Cl, or (4) I* + Cl*, but also to the different chlorine isotopes (35Cl and Cl). Moreover, some extra peaks showed the existence of an intense hot 37 band effect from vibrationally excited ICl molecules, though only a few percent of ICl molecules remained in the vibrationally excited states in our supersonic molecular beam. Based on the spectra near 304 nm, the quantum yield Ф of each channel, the curve crossing, and the branching fraction σ from each transition state were determined. | CHENG Min YU ZiJun XU XiLing YU Dan DU YiKui ZHU QiHe | 2012 | Science China Chemistry2012，55，6： | 0 |
| 6 | Genome transfer for the prevention of female infertility caused by maternal gene mutation显示文摘Poor oocyte quality is associated with early embryo developmental arrest and infertility.Maternal gene plays crucial roles in the regulation of oocyte maturation,and its mutation is a common cause of female infertility.However,how to improve oocyte quality and develop effective therapy for maternal gene mutation remains elusive.Here,we use Zar1 as an example to assess the feasibility of genome transfer to cure maternal gene mutationecaused female infertility.We first discover that cytoplasmic deficiency primarily leads to Zar1-null embryo developmental arrest by disturbing maternal transcript degradation and minor zygotic genome activation(ZGA)during the maternal-zygotic transition.We next perform genome transfer at the oocyte(spindle transfer or polar body transfer)and zygote(early pronuclear transfer or late pronuclear transfer)stages to validate the feasibility of preventing Zar1 mutationecaused infertility.We finally demonstrate that genome transfer either at the oocyte or at the early pronuclear stage can support normal preimplantation embryo development and produce live offspring.Moreover,those pups grow to adulthood and show normal fertility.Therefore,our findings provide an effective basis of therapies for the treatment of female infertility caused by maternal gene mutation. | Dandan Bai Jin Sun Yanping Jia Jiqing Yin Yalin Zhang Yanhe Li Rui Gao Xiling Du Kunming Li Jiaming Lin Zhifen Tu Yu Wang Jiaping Pan Shanshan Liang Yi Guo Jingling Ruan Xiaochen Kou Yanhong Zhao Hong Wang Cizhong Jiang Fengchao Wang Xiaoming Teng Wenqiang Liu Shaorong Gao | 2020 | Journal of Genetics and Genomics2020，47，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员