Formation of the Yazi Spring Stream and its significance on tectonics-climate on the northern slope of Kunlun Mountains

The sequences of fluvial terraces in the Yazi Spring Stream are signs of the stepwise uplift of the Kunlun Mountains in the northern part of the Tibetan Plateau since the Late Pleistocene. Geomorphic and sedimentary features of the terraces reveal that they have resulted from the phased tectonic uplift and the consequent river incision in the northern plateau. Using the method of Single-aliquot Regenerative-dose （SAR） Protocol and Radiocarbon ^14C dating, the deposit ages of three-grade terraces were obtained, which are 57.5, 12.8 and 5.7 kaBP, respectively. The features and ages of terraces reveal that the incision rate of the stream accelerated at the beginning of the Holocene. The incision rate changed suddenly at 12.8 KaBP, from 0.43±0.07 mm/a to 1.59±0.55 mm/a. This implicates that uplift of the Kunlun Mountains is intensive at the first onset of the Holocene, corresponding to the obvious change of slip-rate on the AItyn Tagh Fault. But its uplift rate is much lower than that of the latter, which suggests that growth of the northern margin of the Tibetan Plateau is stronger than its interior.     

Pollen record from red clay sequence in the central Loess Plateau between 8.10 and 2.60 Ma

The origin and development of Asian monsoon circula-tion, the desertification and aridification of Asian inland in relation to vegetation evolution and the soil erosion in northwest China have been more and more drawing inten-sive scientific and society attention. Recently the studiesof monsoon evolution from some Tertiary Red Clay sec-tions located at the central Loess Plateau in the eastern Liupan Mountains, based on chronology, dust flux, grains size, magnetic susceptibility, and rates o…     

Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions

Recent researches indicate that the global climate really shows a warming trend[1―5]. The Intergovernment Panel on Climate Change (IPCC) predicts a 1.4℃―5.8℃ rise in the global surface temperature between 1990 and 2100 using the climate change forecast model[5]. During the same times, the climate in the Qinghai-Tibet Plateau will also bring about relevant changes. Recent predictions show that the air temperature of the Qinghai- Tibet Plateau will be a rise of 2.2℃―2.6℃ by 2050. Th…     

蒙药材块根糙苏生药学研究

目的：为蒙药材块根糙苏建立生药鉴定体系．方法：本草考证、原植物鉴定及采用性状鉴别和显微鉴定法．结果：本草文献所载块根糙苏（别名鲁格木日）为唇形科植物块根糙苏Phlomis tuberoda L.或串铃草Phlomis mongolica Turcz．块根．结论：本研究对蒙药材块根糙苏鉴别提供依据．     

蒙药的历史与研究现状、发展前景

本文综述了蒙药的历史渊源及与其他民族的交流情况、蒙药资源及现代蒙药的分类、现代蒙药研究的现状、开发前景和存在问题及解决办法.     

半干旱区小麦水分亏缺特征及其模型的研究

利用近３０年（１９６１－１９９０年）的气象资料，分析了甘肃黄土高原半干旱区内，春、冬小麦理论需水量（ＥＴｍ）、有效降雨量（ＥＰ）、水分亏缺量（ＷＤ）、水分亏指数（ＷＤＩ１）和小麦生长时间（ｄ）之间的数理关系； 干旱区小麦气候水分亏缺特征进行了系统的研究，建立了小麦气候水分亏缺亏和指标。研究结果表明，春、小 小麦水发缺撮严重的时期均为拔节－抽穗期，其次为抽穗－成熟期；春、冬小麦理论需水量和有效降雨量     

高原实验家兔骨髓血窦的体视学研究

本文应用体视学方法，对平原及移居到高原（３９００ｍ）的不同时期的实验家兔骨髓血窦的研究发现，高原实验第一、三、八周组家兔骨髓血窦数密度及长度密度均有增加。第一、三周组家兔血窦的体积密度增加，面积密度降低，与平原对照组相比，Ｐ＜０．０１。表明：在高寒缺氧的环境下，在急性和亚急性缺氧期，实验组骨髓窦体积增大，长度增加，血窦扩张充血明显；在慢性缺氧期，血窦外形迂曲不均，分枝增加，有新生血窦出现，上述骨髓血窦的变化，是骨髓组织对低氧的主要反应之一     

青藏高原日土地区构造单元划分,特征及演化

西藏高原的构造单元及深断裂基本上汇聚在日土地区,是揭开青藏高原成因奥秘关键之地。笔者将该地区划分为6个亚一级和若干次级构造单元:昆仑海西、冈底斯早燕山两褶皱系和巴颜喀拉印支褶皱带具典型地槽性质,喀喇昆仑晚海西、喜马拉雅晚燕山两褶皱系和羌塘地块趋于准地台性质。各单元由活动转稳定过程、深断裂形成与封闭、岩浆活动等均具北老南新逐渐阶段性迁移特征;岩石圈固结有自北而南逐渐推移扩大趋势。巨大蛇绿岩带显示新生地槽的发展演化。     

黄土高原水土保持与农业可持续发展工程技术措施及应用

水和土是人类赖以生存的重要资源，也是自然资源的重要组成部分，还是国民经济发展的基础。本文根据黄土高原地区治理的长远计划和远景目标规划，通过总结历史经验和失败教训，针对黄土高原地区水土流失严重的实际情况，提出了黄土高原地区水土保持及生态环境的恢复与重建的具体对策和工程技术，为决策部门提供可靠科学依据。     

蒙古族罕见的外胚层发育不全症的临床分析

目的：确定该家系遗传病的临床类型和遗传方式．方法：采用现场调查、临床检查以及系谱调查与分析方法．结果：本家系现受累患者共有16名(14名男性和2名女性)．男性患者症状较重，牙齿最多20颗，最少7颗．女性患者症状轻，仅缺少4颗牙齿和2颗牙齿．外胚层发育不全症的相关症状排除性检查表明患者除头发稍微卷曲的共同特征外未发现其他症状．遗传学分析表明该病为X连锁隐性遗传，携带者也有不同程度的表现．结论：本蒙古族家系临床表现主要是先天性牙齿缺失．男性患者缺失牙数量、部位有差异，两名女性患者是携带者，表现的症状较轻，其他携带者不表现症状，此病存在表现度不一致现象．