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您的检索式：作者名="Wenkun Tang"
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| 1 | Evidence of Abrupt Climate Change during the Mid-to Late-Holocene Recorded in a Tropical Lake, Southern China显示文摘Research on abrupt paleoclimatic and paleoenvironmental change provides a scientific basis for evaluating future climate. Because of spatial variability in monsoonal rainfall, our knowledge about climate change during the mid-to lateHolocene in southern China is still limited. We present a multi-proxy record of paleoclimatic change in a crater lake, Lake Shuangchi. Based on the age-depth model from 210 Pb, 137 Cs and AMS14 C data, high-resolution mid-to late-Holocene climatic and environmental records were reconstructed using multiple indices(TOC, TN, C/N, δ13 C and grain size). Shuangchi underwent a marked change from a peat bog to a lake around 1.4 kaBP. The C3 plants likely dominated during 7.0–5.9 ka and 2.5–1.4 kaBP, while C4 plants dominated between 5.9–3.2 and 3.0–2.5 kaBP. Algae were dominant sources of organic matter in the lake sediments after 1.4 kaBP. Several intervals with high concentrations of coarser grain sizes might be due to flood events. These results reveal that several abrupt paleoclimatic events occurred around 6.6 ka, 6.1 ka, 5.9 ka, 3.0 ka, 2.5 ka and 1.4 kaBP. The paleoclimatic change recorded in the lake may be related to the migration of the Intertropical Convergence Zone(ITCZ) and El Ni?o-Southern Oscillation(ENSO) activity. | LING Yuan TANG Wenkun WANG Yong TIAN Fei YUAN Lupeng YE Mengni | 2020 | Acta Geologica Sinica(English Edition)2020，94，4： | 1 |
| 2 | 大豆总皂苷改善力竭大鼠心肌抗氧化能力与运动能力(英文)显示文摘目的:本实验旨在研究大鼠运动至力竭过程中,大豆总皂苷(TS)对心肌抗氧化能力的影响。方法:用跑台一次运动力竭模型,将受试大鼠分为4组:对照组、TS组、力竭组、TS力竭组。按每千克体重20毫克、每天一次的剂量持续两周喂服TS组和TS力竭组大鼠。力竭组喂服安慰剂,对照组不给予任何处理。将跑步机速度预设为30 m/min,让力竭组和TS力竭组大鼠进行跑台运动直至力竭,立即处死并制备10%的心肌组织匀浆。结果:与力竭组相比,TS力竭组运动时间显著延长20.62%(p<0.05)。与对照组相比,TS组CAT、GSH-Px和GR酶活性显著增强(p<0.01),TS力竭组GSH-Px与GR酶活性显著增强(p<0.01)而MDA水平显著降低(p<0.05)。与力竭组相比,TS力竭组GSH-Px活性显著增强(p<0.01),TS组CAT、GSH-Px和GR酶活性均显著提高(p<0.01)。与TS组相比,TS力竭组CAT和GR活性显著增强(p<0.01)。结论:TS可不同程度地改善运动大鼠的心肌抗氧化活性,降低大鼠心肌MDA水平、血清AST和LDH水平,延长运动时间并延缓运动疲劳的发生。 | Zhigang Liu Yun Liu Zhengying Xiong Yue Feng Wenkun Tang | 2016 | Journal of Sport and Health Science2016，5，4： | 1 |
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