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Distribution of Vascular Plant Species Richness Along an Elevational Gradient in the Dongling Mountains, Beijing, China

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Journal of Integrative Plant Biology 2006年第2期48卷 153-160页

作者： Hai-Bao Ren Shu-Kui Niu lin-yan zhang Ke-Ping Ma Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China College of Natural Resources and Environment Beijing Forestry University Beijing 100083 China International Institute of Earth System Science Nanjing University Nanjing 210093 China

Quantifying spatial patterns of species richness and determining the processes that give rise to these patterns are core problems In blodlverslty theory. The aim of the present paper was to more accurately detect patterns of vascular species richness at different scales along altitudinal gradients In order to further our understanding of blodlverslty patterns and to facilitate studies on relationships between blodlverslty and environmental factors. Species richness patterns of total vascular plants species, Including trees, shrubs, and herbs, were measured along an altitudinal gradient on one transect on a shady slope In the Dongllng Mountains, near Beljlng, China. Direct gradient analysis, regression analysis, and geostatlstlcs were applied to describe the spatial patterns of species richness. We found that total vascular species richness did not exhibit a linear pattern of change with altitude, although species groups with different ecological features showed strong elevatlonal patterns different from total species richness. In addition to total vascular plants, analysis of trees, shrubs, and herbs demonstrated remarkable hierarchical structures of species richness with altitude （I.e. patchy structures at small scales and gradients at large scales）. Species richness for trees and shrubs had similar spatial character-Istics at different scales, but differed from herbs. These results Indicated that species groups with similar ecological features exhibit similar blodlverslty patterns with altitude, and studies of blodlverslty based on species groups with similar ecological properties or life forms would advance our understanding of variations In species diversity. Furthermore, the gradients or trends appeared to be due mainly to local variations In species richness means with altitude. We also found that the range of spatial scale dependencies of species rlchnese for total vascular plants, trees, shrubs, and herbs was relatively large. Thus, to detect the relationshi

关键词： geostatistics life form patterns scale species richness.

Hierarchical flower-like NiFe2O4 with core-shell structure for excellent toluene detection

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Rare Metals 2021年第6期40卷 1578-1587页

作者： yan-lin zhang Chao-Wei Jia Ruo-Nan Tian Hong-Tao Guan Gang Chen Cheng-Jun Dong School of Materials and Energy Yunnan UniversityKunming 650091China

The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique ***,hierarchical flower-like NiFe_(2)O_(4) with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH4 *** controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH4 *** flower-like NiFe_(2)O_(4) sensor exhibited outstanding sensitivity of 19.95 to 100×10^(-6) toluene with low detection limit(1×10^(-6)).Furthermore,the sensor showed superior sensing selectivity and longterm stability to *** excellent sensing properties could largely arise from a combination of high surface area,numerous active sites,porous structures,and the native catalytic characteristics of NiFe2 O4 to facilitate toluene molecules adsorption,diffusion,and reaction.

关键词： Hierarchical NiFe2O4 Core-shell Gas sensor Toluene

Important contributions of natural gas combustion to atmosphericnitrate aerosols in China: Insights from stable nitrogen isotopes

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Science Bulletin 2024年第19期69卷 3001-3004页

作者： Yu-Chi lin Mei-Yi Fan Yihang Hong Mingyuan Yu Fang Cao yan-lin zhang School of Ecology and Applied Meteorology Nanjing University of Information Science and TechnologyNanjing 210044China Atmospheric Environment Center Joint Laboratory for International Cooperation on Climate and Environmental ChangeMinistry of EducationNanjing University of Information Science and TechnologyNanjing 210044China

Coal has long been used as a major fuel for human activities in *** amounts of SO_(2) and NO_(x) released into the atmosphere undergo chemical reactions to form secondary inorganic aerosols(SIAs),inducing haze formati... 详细信息

关键词： nitrate inorganic

Primary cutaneous mantle cell lymphoma:Report of a rare case

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World Journal of Clinical Cases 2020年第8期8卷 1507-1514页

作者： Xiao-Dan Zheng yan-lin zhang Jian-Lan Xie Xiao-Ge Zhou Department of Pathology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

BACKGROUND We describe the case of a 74-year-old man diagnosed with primary cutaneous mantle cell lymphoma(MCL),an extremely rare and controversial condition that is not included in the World Health Organization-European Organization for Research and Treatment of Cancer classification for cutaneous *** SUMMARY The patient presented diffuse cutaneous erythematous plaques and nodules throughout the *** lesions were biopsied and histopathological examination showed diffuse monomorphic lymphocyte infiltration in the dermal and subcutaneous layers,sparing the *** staining revealed CD20,cyclin-D1,CD5,and SOX-11 *** in situ hybridization showed CCND1/IGH gene *** diagnosis of primary cutaneous MCL requires ensuring that no other parts are involved;these cases require close follow-up to monitor their possible progression to systemic disease and for treating relapsed cutaneous *** this case,positron emission tomography scanning and clinical staging revealed no systemic involvement,and follow-up examination at 20 mo after diagnosis showed no evidence of systemic *** prognosis of primary cutaneous MCL is relatively *** patient received six cycles of chemotherapy,and the cutaneous manifestations presented almost complete *** Primary cutaneous MCL is rare,and its prognosis is relatively ***,correct diagnosis is a prerequisite for proper treatment.

关键词： Primary Cutaneous Mantle cell lymphoma Diagnosis Treatment Prognosis Case report

Intrahepatic cholangiocarcinoma is more complex than we thought:A case report

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World Journal of Clinical Cases 2021年第6期9卷 1469-1474页

作者： Jian-Ting Zeng Jie-Feng zhang Yu Wang Zhou Qing Zhen-Hua Luo yan-lin zhang Yi zhang Xian-zhangLuo Key Laboratory for Biorheological Science and Technology of Ministry of Education Chongqing UniversityChongqing University Cancer HospitalChongqing 400030China Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment Chongqing University Cancer HospitalChongqing 400030China

BACKGROUND Brain metastasis from intrahepatic cholangiocarcinoma is *** the best of our knowledge,only a few cases have been *** biological behavior was complex,and treatment requires further *** SUMMARY A 62-year-old woman complained of left limb *** computed tomography showed a 5.0 cm×5.6 cm lesion in the left lobe of the *** markers were *** analysis indicated absence of hepatitis *** magnetic resonance imaging revealed a 1.0 cm×1.3 cm mass in the right frontal *** cholangiocarcinoma with brain metastasis was diagnosed by our liver cancer multidisciplinary *** sufficient preparation,the patient underwent partial frontal lobotomy and left *** results confirmed that both the lesions were *** cycles of gemcitabine combined with S1 were *** a 39 mo postoperative follow-up,no sign of local recurrence or distant metastasis was *** This case expands our knowledge concerning the complex and heterogeneous nature of tumor metastasis.

关键词： Intrahepatic cholangiocarcinoma Brain metastasis Multidisciplinary team Synchronous brain metastasis Case report

Elevated procalcitonin levels in the absence of infection in procalcitonin-secretin hepatocellular carcinoma:A case report

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World Journal of Clinical Cases 2022年第29期10卷 10811-10816页

作者： Jian-Ting Zeng Yu Wang yang Wang Zheng-Hua Luo Zhou Qing Yi zhang yan-lin zhang Jie-Feng zhang De-Wei Li Xian-zhang Luo Key Laboratory for Biological Science and Technology of Ministry of Education Chongqing UniversityChongqing University Cancer HospitalChongqing 400044China

BACKGROUND Serum procalcitonin(PCT)is widely used to diagnose bacterial infection and ***,PCT may be elevated in some *** is important to distinguish infection from no infection in such *** relationship between hepatocellular carcinoma(HCC)and PCT is *** SUMMARY A 62-year-old male was admitted due to a hepatic lesion of unknown *** patient had an elevated PCT *** diseases were excluded after appropriate *** then underwent exploratory laparotomy and a left lateral hepatectomy was *** patient recovered with an uneventful postoperative course and PCT level decreased gradually and was normal on day *** was diagnosed by histopathology and no evidence of infection was ***,immunohistochemical analyses revealed that tumor cells were positive for *** HCC cells can secrete PCT in the absence of infection and PCT may be used as a marker to monitor the efficacy of tumor therapy.

关键词： Hepatocellular carcinoma Procalcitonin Infection Case report

Bilateral choroidal ganglioneuroma:a comprehensive analysis of vision decline in a 6-year-old boy

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International Journal of Ophthalmology(English edition) 2024年第9期17卷 1755-1759页

作者： Yi-Zhe Cheng Li-Mei Sun Min-Er Yuan lin-yan zhang Shu-Ya Ke Xiao-yan Ding State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou 510060Guangdong ProvinceChina Guangdong Provincial Clinical Research Center for Ocular Diseases Guangzhou 510060Guangdong ProvinceChina

Dear Editor,We write to present a 6-year-old boy with bilateral choroidal ganglioneuroma(CG)by comprehensive multimodal imaging(MMI)in a duration of 6-year *** our knowledge,this is the first case report with elaborate data to delineate the natural history of visual function and MMI in a boy with rare bilateral CG,confirmed by choroid biopsy.

关键词： comprehensive modal fir

Characteristics of helium accumulation in the Guanzhong Basin, China

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China Geology 2019年第2期2卷 218-226页

作者： Min Dong Zong-xiu Wang Hui Dong Li-cheng Ma lin-yan zhang Institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyMinistry of Natural ResourcesBeijing 100081China Key Lab of Shale Oil and Gas Geological Survey Chinese Academy of Geological SciencesChina Geological SurveyMinistry of Natural ResourcesBeijing 100081China Xi’an Center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China

Guanzhong Basin is located in the transitional zone between the Qinling orogenic belt and the Ordos plateau. Analyses of drill and geothermal wells depict that the Guanzhong Basin has abundant gas, and its major source rocks are the U-rich granites. In this study, the granitoid intrusive samples were collected from the Huashan, Baoji, Muhuguan rocks in Guanzhong Basin. A micro laser Raman spectrum examination was used to measure the composition of inclusion in the granite quartz fissures. The results depict that the inclusions include both gas-liquid and H2O-NaCl-CO2 inclusions and that their composition primarily includes H2O and CO2, with small amounts of CH4, H2 and H2S. These inclusions can be classified into nearly-primary, early secondary, and late secondary inclusions, which have homogenization temperatures of greater than 430℃, 330-370℃ and 170-230℃, respectively, based on the inclusion measurements. Additionally, the apatite fission-track investigations of six samples, which were collected from the granites at Huashan, Baoji rocks and the southern margin of Muhuguan along with the Cretaceous Sigou Formation sandstones that are located in the northwestern margin of the Guanzhong Basin reveal that the northern Guanzhong Basin began to receive deposits as early as 84 -69 Ma. This period was accompanied by the rapid uplift of the Qinling orogenic belt, which was followed by an uplift of the southern basin margin and the Qinling orogenic belt from 44-28 Ma. The authors obtained an age histogram and a probability density distribution of three sample points. The results show that the age spectra of the zircons in the Cretaceous Sigou Formation sandstones can be divided into four tectonic events. Combined with the ages of apatite fission tracks and zircon, the Guanzhong Basin has experienced five tectonic stages as follows: 28-84 Ma, 170-260 Ma, 280-510 Ma, 610-1200 Ma, and 1210-2870 Ma. Using the thermal chronology constraints, inclusion composition analyses, whic

关键词： Guanzhong Basin Fluid inclusions Thermochronology Helium reservoir accumulation

Occurrence and influence of residual gas released by crush methods on pore structure in Longmaxi shale in yangtze Plate, Southern China

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China Geology 2020年第4期3卷 545-557页

作者： Ming-liang Liang Zong-xiu Wang Guo-dong Zheng Hugh Christopher Greenwell Hui-jun Li lin-yan zhang Xing-qiang Feng Kai-xun zhang Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Lab of Shale Oil and Gas Geological Survey Chinese Academy of Geological SciencesBeijing 100081China Departments of Earth Sciences Durham UniversityDurham DH13LEUK Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China

The composition of gas released under vacuum by crushing from the gas shale of Longmaxi Formation in Upper yangtze Plate,Southern China was systematically investigated in this *** effect of residual gas release on pore structures was checked using low-pressure nitrogen adsorption *** influence of particle size on the determination of pore structure characteristics was *** the Frenkel-Halsey-Hill method from low-pressure nitrogen adsorption data,the fractal dimensions were identified at relative pressures of 0‒0.5 and 0.5‒1 as D1 and D2,respectively,and the evolution of fractal features related to gas release was also *** results showed that a variety component of residual gas was released from all shale samples,containing hydrocarbon gas of CH4(29.58%‒92.53%),C2H6(0.97%‒2.89%),C3H8(0.01%‒0.65%),and also some non-hydrocarbon gas such as CO2(3.54%‒67.09%)and N2(1.88%‒8.07%).The total yield of residual gas was in a range from 6.1μL/g to 17.0μL/g related to rock *** geochemical and mineralogical analysis suggested that the residual gas yield was positively correlated with quartz(R^2=0.5480)*** residual gas released shale sample has a higher surface area of 17.20‒25.03 m^2/g and the nitrogen adsorption capacity in a range of 27.32‒40.86 ml/g that is relatively higher than the original samples(with 9.22‒16.30 m^2/g and 10.84‒17.55 ml/g).Clearer hysteresis loop was observed for the original shale sample in nitrogen adsorption-desorption isotherms than residual gas released *** structure analysis showed that the proportions of micro-,meso-and macropores were changed as micropores decreased while meso-and macropores *** fractal dimensions D1 were in range from 2.5466 to 2.6117 and D2 from 2.6998 to 2.7119 for the residual gas released shale,which is smaller than the original *** factor may indicate that the pore in residual gas released shale was more homogeneous than the original *** resul

关键词： Shale gas Pore structure Residual gas Particle size Fractal dimension Low-pressure nitrogen adsorption Oil and gas exploration engineering Longmaxi shale Southern China