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| 1 | Developing stages and causes of desertification in the Mu Us sandland显示文摘Based on historical aerial photography of three periods and together with field investigation, the status of desertification development after the 1950s in the Mu Us sandland was analyzed, the difference of the desertification developing speed at two stages was compared, and its possible causes were explored. The results show that the developing speed of desertification from the late 1970s to the early 1990s is apparently slowed down, compared with that from the late 1950s to the late 1970s and there exists an obvious recovery trend at the second stage. The difference between the two stages accounts for severely over-reclaiming, over-grazing and unrestricted cutting during the first stage, which are the main causes of desertification development in the semi-arid steppe and arid desert steppe areas. | Bo Wu Longjun Ci | 1999 | Chinese Science Bulletin1999，44，9： | 6 |
| 2 | Homoharringtonine is a safe and effective substitute for anthracyclines in children younger than 2 years old with acute myeloid leukemia显示文摘Homoharringtonine (HHT),a plant alkaloid from Cephalotaxus harringtonia,exhibits a unique anticancer mechanism and has been widely used in China to treat patients with acute myeloid leukemia (AML) since the 1970s.Trial SCMC-AML-2009 presented herein was a randomized clinical study designed based on our previous findings that pediatric AML patients younger than two years old may benefit from HHT-containing chemotherapy regimens.Patients randomized to arm A were treated with a standard chemotherapy regimen comprising mainly of anthracyclines and cytarabine (Ara-C),whereas patients in arm B were treated with HHTcontaining regimens in which anthracyclines in all but the initial induction therapy were replaced by HHT.From February 2009 to November 2015,59 patients less than 2 years old with de novo AML (other than acute promyelocytic leukemia) were recruited.A total of 42 patients achieved a morphologic complete remission (CR) after the first course,with similar rates in both arms (70.6% vs.72.0%).At the end of the follow-up period,40 patients remained in CR and 5 patients underwent hematopoietic stem cell transplantation in CR,which could not be considered as events but censors.The 5-year event-free survival (EFS) was 60.2%± 9.6% for arm A and 88.0%± 6.5% for arm B (P=0.024).Patients in arm B experienced shorter durations of leukopenia,neutropenia,and thrombocytopenia and had a lower risk of infection during consolidation chemotherapy with high-dosage Ara-C.Consequently,the homoharringtonine-based regimen achieved excellent EFS and alleviated hematologic toxicity for children aged younger than 2 years with de novo AML compared with the anthracycline-based regimen. | Xiaoxiao Chen Yanjing Tang Jing Chen Ru Chen Longjun Gu Huiliang Xue Ci Pan Jingyan Tang Shuhong Shen | 2019 | Frontiers of Medicine2019，13，3： | 3 |
| 3 | Exclusion effects on vegetation characteristics and their correlation to soil factors in the semi-arid rangeland of Mu Us Sandland,China显示文摘Exclusion has been applied as a main measure for re-vegetation all over the world.This paper,by comparing the results of year-round exclusion,seasonal exclusion,and non-exclusion,quantified the vegetation variations under three different exclusion measures and their correlation to soil factors.The analysis results for community species component and plant diversity using multi-response permutation procedures(MRPPs)showed that exclusion did change the species com ponent and increase plant diversity remarkably,while the period of exclusion had no significant influence on these two community features.The indicator species analysis and calculation of similarity indices indicated that community for year-round exclusion were becoming xerophytization and unpalatability,and showed highly spatial heterogeneity of plant species distribution,whereas community for seasonal exclusion was under stable non-equilibrium condition.Detrended correspondence analysis(DCA)and detrend canonical correspondence analysis(DCCA)results of relationship between plant species and soil variables demonstrated that soil moisture was a controlling factor for plant species component,microbiotic soil crust cover,soil organic matter,and soil bulk density had significant effects on soil moisture,among which microbiotic soil crust was a leading factor owing to its limitation to rainfall infiltration on the one hand,and its constraints to entrance of herbaceous seeds into soil or to germination of soil seeds on the other hand.As a result of long-term removal of animal grazing,crust kept intact in year-round exclusion community,which was a main reason of community xerophytization.It was also obvious from ordination results that some important environmental factors,such as tempo-spatial change of rainfall and corresponding tempo-spatial change of soil moisture,were neglected during direct gradient analysis.In addition,biodiversity was close related to soil nutrients as well as to soil moisture condition(soil water content and crust cover),and it had positive relation to available N,and negative relation to available P.Higher soil N had advantage to non-leguminous plants growth on nutrition-poor sand land definitely.The impact of P to community component was unclear and should be studied from plant physiology.Further researches on nonequilibrium theory in semi-arid rangeland will provide a sci-entific and flexible animal development paradigm for being implementing livestock fen-raising and grazing-forbidden policies in China. | YANG Xiaohui ZHANG Kebin HOU Ruiping CI Longjun | 2007 | Frontiers in Biology2007，2，2： | 1 |
| 4 | Landscape change and desertification development in the Mu Us Sandland, Northern China显示文摘 | Wu Bo Ci LongJun | 2002 | Journal of Arid Environments2002，50，： | 1 |
| 5 | Oasis land-use dynamics and its influence on the oasis environ- ment in Xinjiang, China显示文摘 | Jia Baoquan Zhang Zhiqiang Ci Longjun | 2004 | Journal of Arid Environ- ments2004，56，1： | 1 |
| 6 | Oasis land-use dynamics and its influence on the oasis environment in Xinjiang,China显示文摘 | Jia Baoquan Zhang Zhiqiang Ci Longjun | 2004 | Journal of Arid Environments2004，56，1： | 1 |
| 7 | Landscape change and desertification development in the Mu Us Sandland, Northern China显示文摘 | Wu Bo Ci Longjun | 2002 | Journal of Arid Environments2002，，50： | 1 |
| 8 | Oasis land-use dynamics and its influence on the oasis environment in Xinjiang, China显示文摘 | Jia Baoquan Zhang Zhiqiang Ci Longjun | 2004 | Journal of Arid Environments2004，56，1： | 1 |
| 9 | Landscape change and desertification development in the Mu Us Sandland, Northern China显示文摘 | Wu Bo Ci Longjun | 2002 | Journal of Arid Environments2002，50，： | 1 |
| 10 | Division of desertification climate types and determination of potential range of desertification in China显示文摘DivisionofdesertificationclimatetypesanddeterminationofpotentialrangeofdesertificationinChinaCILongjunWUBoChineseAcademyofFor... | CI Longjun WU BoChinese Academy of Forestry, Beijing 100091 CHINA | 1998 | Journal of Geographical Sciences1998，8，2： | 0 |
| 11 | ECOLOGICAL LANDSCAPE EFFECTS OF WINDBREAK SYSTEMS IN DESERT ZONE OF WESTERN CHINA显示文摘This paper, by applying the theories of landscape ecology, illustrates the role and mechanism of windbreak system in the establishment and maintenance of oasis ecosystem on the basis of systematic analysis of characteristics and ecological crises of China’s desert, and especially of desert zone in western China. Furthermore, direct economic benefits are summarized. | Ci Longjun Chinese Academy of Forestry, 100091, Beijing People’s Republic of China | 1997 | Journal of Geographical Sciences1997，7，2： | 0 |
| 12 | THE IMPACTS OF GLOBAL CHANGE ON DESERTIFICATION IN CHINA显示文摘Global change and desertification are the serious environmental problems in the world today and exert great impacts on human existence and social development. Therefore, the United Nations has set up quite a number of relevant organizations to encourage millions upon millions of people to combat this harmful problem. At the same time, since the 1992 UN Conference on Environment and Development (UNCED) in Rio de Janeiro, the UN Convention to Combat Desertification has been signed and this signment of the Convention will powerfully promote the concrete action programs to combat desertification of each affected country and enlarge the exchange and cooperation among the affected countries. According to recent information of UN Organizations, more than 100 countries and their one-fifth world of population are facing the problem of desertification processes and desertification impacts, and are suffering from expansion of desertification. The total areas of arid, semi-arid and dry sub-humid zones cover approximately about 6.5 billion ha, occupying 41 percent of the total land area of the earth. There are 3.6 billion ha of arable land and grazing land under the impact of desertification in the world. From 1984 to 1991, the annual increase of land desertification is 3.4 percent. The harmful results of desertification on human existence in terms of environment, societies and economy are serious and called for great attention from the UN Systems. It is concluded that desertification is the most serious environmental problem in the world and its resulting impact is socially and economically surprising. | Ci Longjun Commission for Integrated Survey of Natural Resources, CAS, Beijing 100101 People’s Republic of China | 1997 | Journal of Geographical Sciences1997，7，3： | 0 |
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