Inter-dune lake sediment cores are ideal and unavailable materials for study climate and environmental changes of arid region.The precious dating of lake sediment cores is required for carrying out high resolution cli...Inter-dune lake sediment cores are ideal and unavailable materials for study climate and environmental changes of arid region.The precious dating of lake sediment cores is required for carrying out high resolution climate and environmental changes with these cores.The Badain Jaran inter-dune lake group embedding in the sand sea is展开更多
The Huguangyan Maar Lake(HML)(21°9’N,110°17’E),situated on the Leizhou Peninsula in the southernmost of China's Mainland,is the deepest recent crater lake among the identified volcanic structures in th...The Huguangyan Maar Lake(HML)(21°9’N,110°17’E),situated on the Leizhou Peninsula in the southernmost of China's Mainland,is the deepest recent crater lake among the identified volcanic structures in the Leiqiong Volcanic Field.The bi-lobate lake,with a diameter of^1.7 km展开更多
目的分析椎管内硬膜外分娩镇痛后产时发热产妇分娩结局的影响因素。方法选取2020年1月至2021年3月江苏省常州市妇幼保健院收治的82例椎管内硬膜外分娩镇痛后产时发热产妇为研究对象,所有产妇均行椎管内硬膜外分娩镇痛,统计产后不良分娩...目的分析椎管内硬膜外分娩镇痛后产时发热产妇分娩结局的影响因素。方法选取2020年1月至2021年3月江苏省常州市妇幼保健院收治的82例椎管内硬膜外分娩镇痛后产时发热产妇为研究对象,所有产妇均行椎管内硬膜外分娩镇痛,统计产后不良分娩结局发生情况,根据产后是否出现不良分娩结局分为不良组(出现不良分娩结局)和良好组(未出现不良分娩结局),收集两组产妇的一般资料,以Logistic回归分析探讨椎管内硬膜外分娩镇痛后产时发热产妇产后出现不良分娩结局的影响因素。结果82例产妇中,产后出现不良分娩结局11例(不良组),不良分娩结局发生率为13.41%(11/82),良好分娩结局71例(良好组)。产妇不良产后结局8例,其中剖宫产4例、羊水污染1例,产后出血3例;新生儿不良结局3例,其中胎儿窘迫2例,Apgar评分≤7分1例。不良组年龄>35岁、妊娠期高血压、初次体温升高时宫口扩张范围≤4.6cm例数占比较良好组高(χ^(2)=25.623、23.993、18.147,P均<0.05),不良组孕前体质指数(body mass index,BMI)、产时胎心率、发热时血清C反应蛋白(C-reactive protein,CRP)、降钙素原(procalcitonin,PCT)水平较良好组高(t=4.286、10.189、3.422、15.951,P均<0.05)。Logistic回归分析结果显示,妊娠期高血压、初次体温升高时宫口扩张范围≤4.6cm、年龄>35岁、孕前BMI数值较高均为硬膜外分娩镇痛后产时发热产妇不良分娩结局的影响因素(OR=2.754,95%CI=1.133~6.693;OR=2.735,95%CI=1.125~6.646;OR=2.776,95%CI=1.142~1.747;OR=3.074,95%CI=1.265~7.471;P均<0.05)。结论椎管内硬膜外分娩镇痛后产时发热产妇产后不良分娩结局的发生率较高,且合并妊娠期高血压、初次体温升高时宫口扩张范围小、年龄较高、孕前BMI数值较高的产时发热产妇产后出现不良分娩结局的风险较高。展开更多
There exist five primary periods of 2 930, 1 140, 490, 250 and 220 a in the Holocene climatic variations in the Huguangyan Maar Lake, according to the energy-spectrum and filter analyses of high-resolution time sequen...There exist five primary periods of 2 930, 1 140, 490, 250 and 220 a in the Holocene climatic variations in the Huguangyan Maar Lake, according to the energy-spectrum and filter analyses of high-resolution time sequences (10-15 a) of the sediment dry density. The peak values of the three temperature-decreasing periods with the 2 930 a cycle occur at about 7 300, 4 250 and 1 200 Cal. aBP. There are 7-8 temperature-decreasing periods with the 1 140 a cycle, and the climate fluctuation range is largest in the early Holocene, and reduces gradually in the middle and late Holocene. The millennial-scale climatic change in the Holocene may adjust the global water cycle and the thermohaline circulation intensity through the harmonic tones of the earth’s precession cycle, which in turn influences the global climate change.展开更多
在来自跨越最后 13 ka BP 的 Erlongwan maar 湖的一个沉积序列，二种主要纹泥类型能被认出：源於生物的纹泥(从礼品到 -11.2 ka BP， 0-632 厘米) 并且碎屑状的纹泥(从 -11.2 到 -12.7 ka BP， 632-700 厘米) 。基于在沉积包含的水藻...在来自跨越最后 13 ka BP 的 Erlongwan maar 湖的一个沉积序列，二种主要纹泥类型能被认出：源於生物的纹泥(从礼品到 -11.2 ka BP， 0-632 厘米) 并且碎屑状的纹泥(从 -11.2 到 -12.7 ka BP， 632-700 厘米) 。基于在沉积包含的水藻的主导的类型，源於生物的纹泥能被分类进 dinocyst 源於生物的纹泥(0-63 厘米) 并且混合(dinocyst 和硅藻) 源於生物的纹泥(214-632 厘米) 。在这篇论文，纹泥的形成过程和部件被描述，为纹泥在整个记录变化的类型的可能的原因被讨论，一张高分辨率的纹泥年表被建立跨越最后 13 ka BP。尽管进一步的纹泥数和错误评价被需要，这里介绍的结果为学习 Erlongwan maar 湖的 palaeoclimate 记录代表一个稳固的基础。展开更多
文摘Inter-dune lake sediment cores are ideal and unavailable materials for study climate and environmental changes of arid region.The precious dating of lake sediment cores is required for carrying out high resolution climate and environmental changes with these cores.The Badain Jaran inter-dune lake group embedding in the sand sea is
基金supported by the National Natural Science Foundation of China(Grant Nos.40472092,40352001)the Scientific Expedition Associationand the Yilite-Mulin Group,China.
基金financially supported by the China Geological Survey(grant no.1212011120045)the NSFC(grant no.41274074)
文摘The Huguangyan Maar Lake(HML)(21°9’N,110°17’E),situated on the Leizhou Peninsula in the southernmost of China's Mainland,is the deepest recent crater lake among the identified volcanic structures in the Leiqiong Volcanic Field.The bi-lobate lake,with a diameter of^1.7 km
文摘目的分析椎管内硬膜外分娩镇痛后产时发热产妇分娩结局的影响因素。方法选取2020年1月至2021年3月江苏省常州市妇幼保健院收治的82例椎管内硬膜外分娩镇痛后产时发热产妇为研究对象,所有产妇均行椎管内硬膜外分娩镇痛,统计产后不良分娩结局发生情况,根据产后是否出现不良分娩结局分为不良组(出现不良分娩结局)和良好组(未出现不良分娩结局),收集两组产妇的一般资料,以Logistic回归分析探讨椎管内硬膜外分娩镇痛后产时发热产妇产后出现不良分娩结局的影响因素。结果82例产妇中,产后出现不良分娩结局11例(不良组),不良分娩结局发生率为13.41%(11/82),良好分娩结局71例(良好组)。产妇不良产后结局8例,其中剖宫产4例、羊水污染1例,产后出血3例;新生儿不良结局3例,其中胎儿窘迫2例,Apgar评分≤7分1例。不良组年龄>35岁、妊娠期高血压、初次体温升高时宫口扩张范围≤4.6cm例数占比较良好组高(χ^(2)=25.623、23.993、18.147,P均<0.05),不良组孕前体质指数(body mass index,BMI)、产时胎心率、发热时血清C反应蛋白(C-reactive protein,CRP)、降钙素原(procalcitonin,PCT)水平较良好组高(t=4.286、10.189、3.422、15.951,P均<0.05)。Logistic回归分析结果显示,妊娠期高血压、初次体温升高时宫口扩张范围≤4.6cm、年龄>35岁、孕前BMI数值较高均为硬膜外分娩镇痛后产时发热产妇不良分娩结局的影响因素(OR=2.754,95%CI=1.133~6.693;OR=2.735,95%CI=1.125~6.646;OR=2.776,95%CI=1.142~1.747;OR=3.074,95%CI=1.265~7.471;P均<0.05)。结论椎管内硬膜外分娩镇痛后产时发热产妇产后不良分娩结局的发生率较高,且合并妊娠期高血压、初次体温升高时宫口扩张范围小、年龄较高、孕前BMI数值较高的产时发热产妇产后出现不良分娩结局的风险较高。
文摘There exist five primary periods of 2 930, 1 140, 490, 250 and 220 a in the Holocene climatic variations in the Huguangyan Maar Lake, according to the energy-spectrum and filter analyses of high-resolution time sequences (10-15 a) of the sediment dry density. The peak values of the three temperature-decreasing periods with the 2 930 a cycle occur at about 7 300, 4 250 and 1 200 Cal. aBP. There are 7-8 temperature-decreasing periods with the 1 140 a cycle, and the climate fluctuation range is largest in the early Holocene, and reduces gradually in the middle and late Holocene. The millennial-scale climatic change in the Holocene may adjust the global water cycle and the thermohaline circulation intensity through the harmonic tones of the earth’s precession cycle, which in turn influences the global climate change.
