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Search Results: 1 - 10 of 26708 matches for " JIN XinDi "
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Characterisics of rare earth elements, trace elements and geological significations of BIF from Sijiaying in eastern Hebei

LI WenJun,JIN XinDi,CUI MinLi,WANG ChangLe,

岩石学报 , 2012,
Abstract: Banded iron formation (BIF), consisting of alternating layers of iron bands and silicon bands, are the most important iron resource in the world. This paper briefly presents two methods of magnetite sample preparation, and focuses on the trace elements and REEs for individual Fe-rich band and Si-rich band. The conventional dissolving method (HF+HNO3) obtains the same effect with the HBr+HF method for the magnetite samples. For the studied samples, crustal contamination can be ruled out on the basis of the generally low concentrations of Th, Zr, Sc. Both the Fe-rich bands and the Si-rich bands display depleted light REE relative to heavy REE, combined with positive La, Y anomalies, suggesting characteristics of sea water. Meanwhile, hydrothermal fluids are identified as major sources because of the positive Eu anomalies. The absence of negative Ce anomalies indicates relatively anoxic condition in the local water. The Fe-rich bands show total concentration of REE higher than the Si-rich bands, which may be related to the characteristics of silicon and iron sediment, the iron sediment is more likely to absorb REE. The high-grade ore has mixed source of hydrothermal and seawater, which has the same origin with the normal ore. Part of high-grade ore are strongly disturbed by the later hydrothermal fluid, even show the characteristics of hydrothermal fluids.

Li Xingsheng,Bian Xindi,Zhong Shiyuan,

大气科学进展 , 1985,
Abstract: The interaction of turbulent and radiative transfer applied to a number of plausible atmospheric situations in the surface layer under the stably stratified condition is discussed.The calculated results show that the long-wave radiative flux has a great influence upon the thermal structure of the surface layer, and that it usually acts in such a way as to weaken the thickness of the constant turbulent heat flux layer. In the case of low wind velocities and strongly stable stratifications, the thickness of the turbulent heat flux layer will become very thin and/or inexistent.
Geological characteristics and genesis of Yuleken-Halasu superimposed and tectonically reworked porphyry copper-gold (molybdenum) deposit in Qinghe, Xinjiang

XIANG Peng,ZHANG LianChang,XU XingWang,LIU GuoRen,LIU ZhenJiang,JIN XinDi,LI WenJun,

岩石学报 , 2012,
Abstract: Yuleken-Halasu porphyry copper-gold (molybdenum) deposit, located in the northwestern section of Kalaxianger porphyry copper metallogenic belt, lies on the northeastern margin of Junggar Basin. Granodiorite porphyry and granite porphyry in Early Hercynian are the main ore-bearing porphyries. The wall rocks are basically a set of volcanic-sedimentary rock series in the Middle Devonian Beitashan Formation, intruded by magmatic rocks in Late Hercynian and Indosinian. Of all the deposits in Kalaxianger metallogenic belt, Yuleken-Halasu deposit is the most intensively deformed. A series of schistositized belts occur in Yuleken-Halasu ore area due to impact of the Erqisi fault. Meanwhile, most of the ore-bearing porphyries and the wall rocks are mylonitized and schistositized inordinately. The main ore rocks are not only mineralized in the form of stockwork and dissemination at the early stage of typical porphyry deposit, but also superimposed in the form of mineralization in the schistosity, mylonitized foliation and cleavage at the late stage. Geochronological study indicates that there are several magmatic and tecton-thermal events in Devonian-Triassic and metallogenic events in Devonian-Carboniferous recorded in the metallogenic belt. Through this article and the previous studies, the metallogenic belt, intruded by mass medium-acidic porphyries, was in the island arc tectonic setting related with oceanic subduction in Middle-Late Devonian (390~360Ma), accompanied by large-scale Cu-Mo mineralization. The whole metallogenic belt went through collision stage with intensely tectonic reworking and superimposed mineralization in Early Carboniferous (360~330Ma). Furthermore, Cu-Mo mineralization was developed along the mylonite foliation. The post-collision stage in Middle-Late Carboniferous (330~300Ma) was characterized by superimposed molybdenite + chalcopyrite + K-feldspar veins mineralization. The metallogenic belt underwent post-orogenic extension stage in Early Permian (270~260Ma), causing Cu-Mo filled and re-enriched in structural fracture cleavage, which resulted in superimposed mineralization developed along the fracture cleavage. In Triassic, the whole metallogenic belt was in intracontinental orogenic stage, accompanied by vein-type superimposed mineralization which was associated with low-angle overthrust faults. Therefore, Yuleken is a typical porphyry deposit which is characterized by superimposition and tectonic reworking.
Health Risk Assessment of Iodine Status in Chinese Residents

Hu Xindi,Gao Fei,Hu Jianying,

生态毒理学报 , 2012,
Abstract: Due to great variation in the natural background levels of iodine found across China,the universal salt iodization(USI) policy,which lacks sufficient consideration on this regional variation,is not the most proper strategy for preventing and controlling iodine deficiency disease,and even may increase potential health risk caused by excessive iodine intake.Recently,the Ministry of Health(MOH) of China has amended the USI policy.However,it is still in urgent needs to evaluate and analyze this policy from a perspective of health risk assessment.In this paper,the iodine status of Chinese residents was assessed,and potential morbidity of subclinical hypothyroidism caused by excessive iodine intake in China was determined by integrating the distribution of urinary iodine concentrations of Chinese 8-10 year-old children,dose-response curves and threshold levels.Then the region-specific recommended iodine upper limits in edible salt were calculated based on the 5% benchmark dose,combined with the results of national dietary survey.Results showed that urinary iodine concentrations of national 8-10 year-old children varied greatly in different regions.The geometric mean value and geometric standard deviation were 168.17 and 2.24 μg·L-1,respectively.The morbidity of subclinical hypothyroidism induced by excessive iodine intake reached 4.00%.Recommended iodine upper limit in edible salt for regions with water iodine concentrations below 150 μg·L-1 was 29.62 mg·kg-1.However,for regions with water iodine concentrations above 150 μg·L-1,adequate iodine status has been achieved through intake pathways other than iodized salt,and thus there is no need to consume iodized salt for residents in those regions.These conclusions stay in support of the current salt iodization policy that region-specific iodine content in edible salt should be established according to iodine status of local residents.
Comparison of nutrient removal ability between Cyperus alternifolius and Vetiveria zizanioides in constructed wetlands

LIAO Xindi,LUO Shiming,WU Yinbao,WANG Zhisan,

应用生态学报 , 2005,
Abstract: In order to compare the nutrient removal ability of Cyperus alternifolius and Vetiveria zizanioides, a 17.0 m2 subsurface flow wetland covered with Cyperus alternifolius and another 13.3 m2 one covered with Vetiveria zizanioides were constructed for piggery wastewater treatment, and the biomass as well as the N, P, Cu and Zn contents in the root and shoot of the plants was measured by the end of each season. The results showed that the below-ground biomass of V. zizanioides was greater than that of C. alternifolius. By the contrary, the above-ground biomass of C. alternifolius was greater than that of V. zizanioides. The annual biomass yield of C. alternifolius was 2.3 times higher than that of V. zizanioides,which was 3406.47 g x m(-2) and 1483.88 g x m(-2), respectively. The N concentration in C. alternifolius tissue was higher than that in V. zizanioides tissue, being 22.69 mg x g(-1) and 15.44 mg x g(-1) respectively, and similarly, the P concentration in C. alternifolius tissue was higher than that in V. zizanioides tissue, being 6.09 mg x g(-1) and 5.47 mg x g(-1) respectively. The Cu and Zn concentrations in C. alternifolius tissue were a little higher than those in V. zizanioides. 68.72 g N x m(-2) and 18.49 g P x m(-2) were removed by harvesting C. alternifolius vegetation, while 8.93 g N x m(-2) and 3.69 g x P m(-2) were removed by harvesting V. zizanioides vegetation. It was concluded that the removals of N, P, Cu and Zn by harvesting vegetation were 4-7 times higher in C. alternifolius wetland than in V. zizanioides wetland.
Numerical studies on the interaction of turhulent and radiative transfers in the surface layer

Li Xingsheng,Bian Xindi,Zhong Shiyuan,

大气科学 , 1985,
Abstract: 本文详细讨论了在稳定层结条件下,近地面层内有各种典型的气象要素分布及下垫面状况时,长波辐射通量与湍流热通量之间的相互关系问题.结果表明:长波辐射通量对近地面层的热力结构有相当大的影响,它常常减弱了常值湍流热通量层的厚度.在弱风和层结稳定度较大的情况下,“常值湍流热通量层”将很薄,有时甚至难以存在.
Usutu Virus: An Emerging Flavivirus in Europe
Usama Ashraf,Jing Ye,Xindi Ruan,Shengfeng Wan,Bibo Zhu,Shengbo Cao
Viruses , 2015, DOI: 10.3390/v7010219
Abstract: Usutu virus (USUV) is an African mosquito-borne flavivirus belonging to the Japanese encephalitis virus serocomplex. USUV is closely related to Murray Valley encephalitis virus, Japanese encephalitis virus, and West Nile virus. USUV was discovered in South Africa in 1959. In Europe, the first true demonstration of circulation of USUV was reported in Austria in 2001 with a significant die-off of Eurasian blackbirds. In the subsequent years, USUV expanded to neighboring countries, including Italy, Germany, Spain, Hungary, Switzerland, Poland, England, Czech Republic, Greece, and Belgium, where it caused unusual mortality in birds. In 2009, the first two human cases of USUV infection in Europe have been reported in Italy, causing meningoencephalitis in immunocompromised patients. This review describes USUV in terms of its life cycle, USUV surveillance from Africa to Europe, human cases, its cellular tropism and pathogenesis, its genetic relationship with other flaviviruses, genetic diversity among USUV strains, its diagnosis, and a discussion of the potential future threat to Asian countries.
李兴生 Li Xingsheng,卞新棣 Bian Xindi,钟世远 Zhong Shiyuan
大气科学 , 1985, DOI: 10.3878/j.issn.1006-9895.1985.04.02
Abstract: 本文详细讨论了在稳定层结条件下,近地面层内有各种典型的气象要素分布及下垫面状况时,长波辐射通量与湍流热通量之间的相互关系问题.结果表明:长波辐射通量对近地面层的热力结构有相当大的影响,它常常减弱了常值湍流热通量层的厚度.在弱风和层结稳定度较大的情况下,“常值湍流热通量层”将很薄,有时甚至难以存在.
卞新棣 Bian Xindi,赵鸣 Zhao Ming,王彦昌 Wang Yanchang
大气科学 , 1989, DOI: 10.3878/j.issn.1006-9895.1989.02.11
Abstract: 本文根据大气边界层与湍流力学理论,研究得到了塔层无量纲风梯度与湍流动量通量在中性及不稳定大气层结中均能满足的理论关系——“塔层KEYPS方程”;并将其数值计算结果与实测数据作了对比,验证结果表明:该关系式和实际情况的吻合程度相当好,因而具有一定的实用价值。
Similar Metabolic Changes Induced by HIPVs Exposure as Herbivore in Ammopiptanthus mongolicus
Jingru Sun, Xiao Zhang, Chuanjian Cao, Xindi Mei, Ningning Wang, Suli Yan, Shixiang Zong, Youqing Luo, Haijun Yang, Yingbai Shen
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095474
Abstract: Herbivore-induced plant volatiles (HIPVs) are important compounds to prim neighboring undamaged plants; however, the mechanism for this priming process remains unclear. To reveal metabolic changes in plants exposed to HIPVs, metabolism of leaves and roots of Ammopiptanthus mongolicus seedlings exposed to HIPVs released from conspecific plants infested with larvae of Orgyia ericae were analyzed together with control and infested seedlings using nuclear magnetic resonance (NMR)-based metabolic technology and multi variate data analysis. Results presented showed that HIPVs exposure led to similar but specific metabolic changes compared with those induced by infestation in both leaves and roots. Furthermore, both HIPVs exposure and herbivore attack resulted in metabolic changes involving a series of primary and secondary metabolites in both leaves and roots. Taken together, these results suggested that priming of yet-damaged plants may be achieved by reconfiguring metabolic pathways in leaves and roots to make similar concentrations for all metabolites as those in seedlings infested. Therefore, we propose that improved readiness of defense induction of primed plants toward subsequent herbivore attack may be based on the similar metabolic profiling induced by HIPVs exposure as those caused by herbivore.
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