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Journal of Integrative Plant Biology 2008年第8期50卷 997-1003页

作者： Liang-Dong Guo Guo-Rui huang yu Wang Systematic Mycology and Lichenology Laboratory Institute of Microbiology the Chinese Academy of Sciences Beijing 100101 China

Endophytic fungi associated with Pinus tabulaeformis Carr. were investigated in the Dongling Mountains of Beijing. A total of 16200 tissue segments of P. tabulaeformis from four sample collections were processed, and 10659 fungal isolates were recovered. The overall colonization and isolation rates of endophytic fungi from high to low were spring〉winter〉autumn〉summer and in different tissues were bark〉needle〉xylem, irrespective of sampling seasons. The colonization rates of endophytic fungi of needles increased with age in the four sample collections. There were no significant differences of the colonization rates of endophytic fungi among 1-, 2-, and 3-year-old bark and xylem, except for significantly lower colonization rates in 1-year-old bark than in 2- and 3-year-old bark in summer. A similar trend of the isolation rates of endophytic fungi occurred. A total of 24 fungal taxa were recorded, of these five taxa Alternaria alternata, Leptostroma sp., Pestalotiopsis besseyi, Phoma lingam, and Phomopsis archeri, were consistently isolated as the common fungi in each sample collection. Our results suggest that some fungi show a certain degree of tissue recurrence or specificity, and the composition of endophytic assemblages is not conspicuously influenced by the seasonal factor.

关键词： colonization and isolation rates endophyte pine season tissue

Photolysis of mono- through deca-chlorinated biphenyls by ultraviolet irradiation in n-hexane and quantitative structure-property relationship analysis

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Journal of Environmental Sciences 2008年第6期20卷 753-759页

作者： LI Xue FANG Lei huang Jun yu Gang POPs Research Centre Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

The photolysis of 16 polychlorinated biphenyls （PCBs）（including mono- through deca-chlorinated） in n-hexane was investigated under ultraviolet irradiation using a 500-W high-pressure mercury lamp. Photolysis of PCBs follows pseudo-first-order reaction kinetics, with photolysis rate constants ranging between 0.0011 s^-1 for PCB-52 and 0.0574 s^-1 for PCB-118. The degradation rates of PCBs by high-pressure mercury lamp irradiation were remarkably independent with respect to the degree of chlorination. Furthermore, partial least squares （PLS） models were developed to provide insight into which aspect of the molecular structure influenced PCB photolysis rate constants. It was found that the photolysis rates of PCBs increased with an increase in the net charge on the carbon atom （qc）, （ELUMO-EHOMO）^2, and the Y-axis dipole moment （μy） values, or the decrease in the energy of the second highest occupied molecular orbital （EHOMO-1）, energy of the lowest unoccupied molecular orbital （ELUMO）, ELUMO ＋ EHOMO, ELUMO - EHOMO, most positive atomic charge （q^＋）, and the twist angle of the chlorine atom （TA） values.

关键词： Photolysis polychlorinated biphenyls n-hexane partial least squares quantum chemical descriptors

Experimental investigation of effects of bio-additives on fuel economy of the gasoline engine

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Science China(Technological Sciences) 2008年第8期51卷 1177-1185页

作者： YAO ChunDe ZHANG ZhiHui XU yuanLi huang yu Stake Key Laboratory of Engines Tianjin UniversityTianjin 300072China

The matter extracted from palm oil was considered as gasoline additive. The effect of various percentages (0.2%, 0.4% and 0.6%) of the bio-additives on fuel economy of SI engine respectively running on prime gasoline, gasoline with known compo- nents, ethanol gasoline, and methanol gasoline under typical urban operation condition 2000 r/min was investigated. The results showed that the bio-additives can remarkably improve the fuel economy of SI engine while operating on all kinds of fuel. The optimal ratio of bio-additive to gasoline depends on the fuel used and on the different engine operating conditions. Besides, the experiments of constant volume combustion bomb, analysis of in cylinder processes, the synchrotron ra- diation and high-temperature friction were conducted to probe into the mechanism of the bio-additive impact on fuel economy. It indicated that the bio-additives can increase the maximum cylinder combustion pressure, improve exhaust emissions and largely reduce the frication coefficient.

关键词： gasoline engine bio-additives fuel economy

Mechanism of the Impact of Floods and Typhoons on the Morphological Evolution of the Yangtze Estuary

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China Ocean Engineering 2023年第3期37卷 447-457页

作者： JIAO Jian DING Lei HAN yu-fang SUN Jie-ying YANG Xiao-yu huang yu-ming DOU Xi-ping Key Laboratory of Port Waterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan 430072China

In the last two decades,the Yangtze Estuary has undergone significant changes under the influence of reduced sediment inflow and estuary *** study investigates the influence of floods and typhoons on sediment concentration and the morphological evolution of shoals and channels in the Yangtze *** analysis is conducted through the utilization of topographic data measured pre-and post-flood events and observations of hydro-sedimentary changes during *** using a generalized estuary mathematical model,this study examines the interplay between varying tidal ranges,tidal divisions,runoff volumes,and regulation projects on the erosion and deposition of shoals and channels in bifurcated *** results show that due to the implementation of river and waterway regulation projects,the impact of the 2020 flood on the main channel and shoal was significantly less than that of the1998 *** swing amplitude of the South Branch main channel ***,local river sections such as the Southern Waterway of Baimao Shoal exhibited *** typhoons,sediment concentration in the 20 cm above the bottom increased significantly and was closely related to wave processes,with a weakened correlation to tidal *** typhoons,high shoals in South Passage above 0 m were silted up,while the terrain on one side of the tail of Jiuduan Shoal in the downstream deep-water area was generally scoured due to strong wave *** generalized mathematical model of the bifurcated estuary revealed that M2 tidal component contributed most to the ero sion and deposition evolution of estuary shoals and channels,with floods exhibiting characteristics of sedime ntation on shoals and erosion on *** the implementation of a branch rectification project,branch resistance increased,diversion decreased,and the riverbed changed from pre-project erosion to post-project sedimentation,with an increase in erosion in non-project branches.

关键词： the Yangtze Estuary flood typhoon morphological evolution

Vertical ozone profiles deduced from measurements of SBUS on FY-3 satellite

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Chinese Science Bulletin 2010年第10期55卷 943-948页

作者： huang FuXiang LIU NianQing ZHAO MingXian WANG ShuRong huang yu National Satellite Meteorological Center Beijing 100081 China Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration Beijing 100081 China National Key Laboratory of Applied Optics Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China

The FY-3 satellite is a second-generation Chinese polar-orbit meteorological *** Solar Backscatter Ultraviolet Sounder (SBUS),one of the main payloads on the FY-3 satellite,is the first Chinese ozone-monitoring instrument on a meteorological *** part of the in-orbit validation of FY-3,we carried out a retrieval trial using measurements from SBUS during the period of 17-30 July,2008,and compared those data with measurements and retrieved profiles from the National Oceanic and Atmospheric Administration (NOAA) satellite SBUV/*** results show that the precision of the measurements and retrieved profiles are quite *** averaged relative difference percentages of the ozone profiles retrieved from SBUS and those from SBUV/2 are within ±7%.

关键词：气象卫星臭氧监测测量数据垂直剖面紫外线探测器配置文件卫星探测器极地轨道

Quality evaluation of glutenite reservoirs of intergranular-secondary dissolution pore type using a quantitative method

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Energy Geoscience 2022年第2期3卷 126-133页

作者： Juanjuan Guo yu huang Yanjun Wang Jianguo Pan Linjun huang Northwest Branch Institute Research Institute of Petroleum Exploration&DevelopmentPetroChinaLanzhouGansu730020China

Glutenite(coarse-grained clastic)reservoirs of intergranularesecondary dissolution pore type are dominated by residual intergranular pores and secondary dissolution pores,and characterized by low porosity,low permeability,strong heterogeneity,and highly variable physical *** is difficult to conduct a quantitative quality assessment of these reservoirs while their primary control factors remain *** this paper,experimental core data and drilling,logging and seismic data are used to assess the effect of sedimentary facies on reservoir *** sedimentary facies zones are identified by analyzing the characteristics of glutenite reservoirs,which includes investigating rock components and their effects on reservoir *** matrix content and rigid particle content are identified as the primary control factors for these *** curves sensitive to reservoir quality are selected and examined to continuously characterize the physical parameters of the *** establishes a calculation model of reservoir assessment parameters through multivariate regression and determines the quantitative assessment parameter *** quality of the glutenite reservoirs is defined using conventional logging *** study also predicts the plane distribution of high-quality reservoirs through geostatistical inversion of the reservoir assessment parameters based on conventional wave impedance inversion,thus providing insight and guidance for quantitative assessment and quality prediction of glutenite reservoirs of the intergranular-secondary dissolution pore *** application of this method to well deployment based on qualitative evaluation of the glutenite reservoirs in oilfields yielded favorable results.

关键词： Glutenite Reservoir quality Reservoir assessment parameter Geostatistical simulation and inversion Mahu Sag Junggar basin

Recent progress on two-dimensional materials confining single atoms for CO_(2) photoreduction

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Chinese Chemical Letters 2022年第12期33卷 5023-5029页

作者： Xianjin Shi Leo NYCao Meijuan Chen yu huang Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary Geology(SKLLQG)Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Center of Excellence in Quaternary Science and Global Change Chinese Academy of SciencesXi'an 710061China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Human Settlements and Civil Engineering Xi'an Jiaotong UniversityXi'an 710049China

Photoreduction of CO_(2) into value-added products offers a promising approach to overcome both climate change and energy ***,low conversion efficiency,poor product selectivity,and unclear mechanism limit the further advancement of CO_(2) *** development of two-dimensional(2D)materials and construction of single atom sites are two frontier research fields in *** the advantages of 2D materials and single atom sites is expected to make a breakthrough in CO_(2) *** this review,we summarized the design and application,proposed challenges and opportunities,and laid a foundation for further research and application of 2D materials confining single atoms(SACs@2D)for CO_(2) photoreduction.

关键词： CO_(2)reduction Photocatalyst Single atom 2D materials g-C_(3)N_(4)

Suppressed threshold voltage roll-off and ambipolar transport in multilayer transition metal dichalcogenide feed-back gate transistors

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Nano Research 2020年第7期13卷 1943-1947页

作者： Yang Liu Peiqi Wang Yiliu Wang yu huang Xiangfeng Duan Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCA 90095USA Department of Materials Science and Engineering University of CaliforniaLos AngelesLos AngelesCA 90095USA California Nanosystems Institute University of CaliforniaLos AngelesLos AngelesCA 90095USA

The layered semiconducting transition metal dichaloogenides(S-TMDs)have attracted considerable interest as the channel material for field-effect transistors(FETs).However,the multilayer S-TMD transistors usually exhibit considerable threshold voltage(Vn)shit and ambipolar behavior at high source-drain bias,which is undesirable for modern digital *** we report the design and fabrication of double feedback gate(FBG)transistors,i.e.,source FBG(S-FBG)and drain FBG(D-FBG),to combat these *** FBG transistors differ from normal transistors by including an extra feedback gate,which is directly connected t0 the source/drain electrodes by extending and overlapping the source/drain electrodes over the yttrium oxide dielectrics on *** show that the S-FBG transistors based on mutilayer MoSg exhibit nearly negligible VIn rlloff at large source drain bias,and the D-FBG mutilayer WSe2 transistors could be tailored into either n-type or p-type transport,depending on the polarity of the drain *** double FBG structure offers an effective strategy to tailor multilayer s-TMD transistors with suppressed Vn roll-off and ambipolar transport for high-performance and low-power logic applications.

关键词： two-dimensional transition metal dichalcogenides feedback gate transistor threshold voltage roll-off ambipolar behavior tailoring

AMPLITUDE OF LOW FREQUENCY FLUCTUATION AT DIFFERENT FREQUENCY BANDS IN EARLY AMNESTIC MILD COGNITIVE IMPAIRMENT: RESULTS FROM ADNI

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Journal of Innovative Optical Health Sciences 2012年第1期5卷 18-27页

作者： LONG-LONG JING LI-yu huang DENG-FENG huang JIE NIU ZHENG ZHONG School of Life Sciences and Technology Xidian University Xi’an 710071 P.R.China

We used resting-state functional magnetic resonance imaging(fMRI)to determine whether there are any abnormalities in different frequency bands between amplitude of low-frequency fluctuations(ALFF)and fractional ALFF(fALFF)and between 10 early amnestic mild cognitive impairment(EMCI)patients and eight normal controls participating in the Alzheimer’s Disease Neuroimaging Initiative(ADNI).We showed widespread difference in ALFF/fALFF between two frequency bands(slow-4:0.027-0.073 Hz,slow-5:0.01-0.027 Hz)in many brain areas including posterior cingulate cortex(PCC),medial prefrontal cortex(MPFC),suprasellar cistern(SC)and ambient cistern(AC).Compared to the normal controls,the EMCI patients showed increased ALFF values in PCu,cerebellum,occipital lobe and cerebellum posterior lobe in frequency band *** in frequency band slow-5,the EMCI patients showed decreased ALFF values in temporal lobe,left cerebrum and middle temporal ***,the EMCI patients showed increased fALFF values in frontal lobe and inferior frontal gyrus in band *** in frequency band slow-4,the EMCI patients showed decreased fALFF values in limbic lobe,cingulate gyrus and corpus *** results demonstrated that EMCI patients had widespread abnormalities of amplitude of LFF in different frequency bands.

关键词： Resting-state fMRI amplitude of low-frequency fluctuation(ALFF) early amnestic mild cognitive impairment

Laparoscopic repair via the transabdominal preperitoneal procedure for bilateral lumbar hernia: Three cases report and review of literature

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World Journal of Clinical Cases 2018年第10期6卷 398-405页

作者： Di-yu huang Long Pan Ming-yu Chen Jing Fang Department of General Surgery Sir Run-Run Shaw Hospital Zhejiang University Key Laboratory of Laparoscopic Technique Research of Zhejiang Province Sir Run-Run Shaw Hospital Zhejiang University

A lumbar hernia is a rare entity, and a bilateral lumbar hernia is much rarer. From May 2015 to October 2017, we treated only three patients with bilateral lumbar hernias. One patient came to the hospital presenting with right-sided abdominal pain, and the other two patients presented with bilateral lumbar masses. The previous bilateral lumbar hernia reported in the literature was repaired by open surgery. The laparoscopic approach via the transabdominal preperitoneal(TAPP) procedure with the self-gripping Parietex ProG rip? mesh was performed at our center. The laparoscopic repair was conducted by a skilled hernia surgeon, and was successfully performed in the three patients. The patients resumed a semiliquid diet and had no activity restriction after six hours following the operation. No antibiotics were used after the surgery. The operative times of the three patients were 120 min, 85 min, and 130 min. The blood loss volumes of the three patients were 20 mL, 5 mL, and 5 mL. The visual analogue scale pain scores of the three patients were 1, 2, and 2 on postoperative day 1, and were 1, 2, and 1 on postoperative day 3. No perioperative complications, such as bulge, wound infection and hematoma, occurred after the surgery. All of the patients were discharged on the third day after the operation. There was no chronic pain and no hernia recurrence during the follow-up. This study showed that the laparoscopic TAPP approach with the self-gripping mesh is safe and feasible, and can be considered an alternative method for the treatment of bilateral lumbar hernias.

关键词： Bilateral lumbar hernia Laparoscopic repair Transabdominal preperitoneal Self-gripping mesh