蒙成药沙日-汤的薄层色谱鉴别

目的：建立蒙成药沙日-汤的鉴别方法．方法：采用薄层色谱法鉴别蒙成药沙日-汤中的各味组成药材．结果：检出了诃子、栀子、川楝子，特征斑点清晰，阴性对照品无干扰．结论：方法操作简便，结果可靠，为蒙成药沙日-汤质量的定性控制提供了实验依据．     

Modern stalagmite oxygen isotopic composition and its implications of climatic change from a high-elevation cave in the eastern Qinghai-Tibet Plateau over the past 50 years

An oxygen isotope record of a stalagmite from Huanglong Cave in the eastern Qinghai-Tibet Plateau dated with 230Th and 210Pb methods provides variations of the Asian monsoon with an average resolu-tion of 1 year over the past 50 years. This study shows that the δ18O of dripwater in the cave represents the annual mean δ18O of local meteoric precipitation and the stalagmites were deposited in isotopic equilibrium. A comparison of the stalagmite δ18O record with instrumentally meteorological data indi-cates that shifts of the δ18O are largely controlled by the amount effect of meteoric precipitation con-veyed through the southwest monsoon(the Indian monsoon) and less affected by temperature. Therefore,the variations of δ18O record reflect the changes in monsoon precipitation on inter-annual time scales under the influence of the southwest monsoon. Like many other stalagmite δ18O records in the Asian monsoon regions,the δ18O record of the stalagmite from Huanglong Cave also reveals a gradually enriched trend during the past 50 years,i.e. relatively enriched in 18O. This trend may indicate the decline of the Asian monsoon intensity which is consistent with the decrease of monsoon indices. The weakening of the modern Asian monsoon well matched with the temperature changes in strato-sphere,which may illustrate that the weakening of the monsoon mainly results from the lowering of solar radiation.     

An important form of basin-mountain coupling： Orogenic belt and flank basin

Orogeny is always associated with the erosion and sediments carried by both transverse and longitudinal river systems. Those two river systems transport sediments into foreland or hinterland basin and flank basin.Longitudinal river systems prevail in and around the Tibetan Plateau due to the fact that they flow parallel to the strike of structures within the developing mountain belt.The flank basins surrounded the Tibetan Plateau and adjacent areas are developed in different tectonic settings, including inland,continental margin and deep ocean, most of them containing oil and natural gas. Those basins not only have longer evolution histories than foreland basins but also are more complete in their records of deposition. Coupling of orogeny and flank basin deposition also occurred widely in pre-Cenozoic time,in particular, the coupling between the Qinling orogenic belt and Songpan-Ganzi flysch flank basin is the most distinctive.The evolution of ancient latitudinal rivers derived from the Qinling orogenic belt during periods of mountain building was controlled not only by landforms but also by the lateral extrusion of the crustal fragments.     

Formate and acetate records in the Muztagata ice core, Northwest Tibetan Plateau

Formic and acetic acids (HCOOH, CH3COOH), originating mainly from biosphere (release by plants, combustion of biomass, motor exhaust and oxidation of organism, etc.), are two simple organic chemical com- pounds in troposphere. Though the concentration of these two organic acids is low in atmosphere, they are the main [1] sources of free acidity in precipitation of remote regions , and contribute minor chemical constituents to the balance between anions and cations, especially to some atm…     

Extension of drylands in northern China around 250 kaBP linked with the uplift of the southeast margin of Tibetan Plateau

Study on two loess sections, one located at Wuwei near the Tengger Desert in northwestern China, another located near Ganzi at the southeast margin of the Tibetan Plateau in southwest China, reveals a coeval drying step occurred at ~250 kaBP. It is expressed by the increase in eolian grain-size at Wuwei, and by a drastic extension of C4 plants and a decrease of loess chemical weathering intensity at Ganzi. Examination of the available eolian data indicates that the event has also been clearly documented in the loess sections near the deserts in northern China, and in the eolian records from the North Pacific. On the contrary, the signal is rather weak for the central and southern Loess Plateau regions as well as for Central Asia, where the climates are influenced by the southeast Asian monsoon and the westerlies, respectively. Since the climate at Ganzi is under strong control of the southwest Asian monsoon, we interpret this drying ste p as a result of decreased influence of the southwest summer monsoon. This decre ase in monsoon moisture is attributable to the uplift of the Hengduan Mountains, the southeast margin of the Tibetan Plateau at～250 ka ago.     

内蒙古东部地区农村、牧区2 689名蒙古族、汉族中、小学生营养状况分析

为了解本地区农村、牧区 8～ 16岁蒙古族、汉族小学生及初中生当前营养状况 .采用整群抽查的方法 ,对 2 6 89名学生进行了营养状况调查 .结果 :营养正常率为 5 5 .9%.其中 ,男、女生正常率分别为 5 8.1%和5 3.6 %(P <0 .0 5 ) ;蒙古族、汉族正常率分别为 5 9.9%和 47.2 %(P <0 .0 0 1) .营养不良率为 41.5 %,其中蒙、汉族分别为 37.6 %和 5 0 .0 %(P <0 .0 0 1) ,男、女生分别是 39.6 %和 43.5 %.超重率为 1.6 %,肥胖率为1.1%.表明该地区现时营养正常率低于全国水平 ,而营养不良率高于全国水平 ,其中汉族高于蒙古族 ,对此现状应采取防治措施 .     

蒙医药治疗慢性肾功能衰竭临床观察

对45例慢性肾功能衰竭患者分别采用蒙医疗法和西医疗法治疗,结果显示:蒙医治疗组总有效率为80%,西医治疗组总有效率为35%,两组疗效差异显著(P＜0.05).提出蒙医疗法是治疗慢性肾功能衰竭的有效方法.