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Search Results: 1 - 10 of 127021 matches for " Yunting Li "
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Reproductive Biology of Ficus beipeiensis  [PDF]
Hongping Deng, Yunting Li, Long Chen, Shaohu Tang
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.618286
Abstract: This paper uses morphological, anatomical and ecological methods to study the morphological characteristics and propagation mechanism of Ficus beipeiensis S.S Chang which is endemic to China, providing a scientific basis for the rare population of wild plants and repopulation. The following results were obtained. First, F. beipeiensis with pollinating fig wasps was highly adapted in morphological structure and behavior. Second, a monoclinous flower period existed during the developmental phase of male flowers. F. beipeiensis had one to four stamens and one pistil. The pistil in the stigma of syconium flowers was similar to that of gall flowers, but no pollinating fig wasps that laid eggs in the ovary were found. Third, wild individual specimens were found to be rare. The investigation found only one male and four female individuals among them. However, only two female plants can bear fruits. The remaining 9 female plants were cultivated, among which only four grew syconia. No fruit, seed germination, and seeding were found under natural conditions. Several possible reasons for the growth of rare wild plants can be found as following: 1) An imbalance between male and female plants reduces breeding efficiency; 2) Ceratosolen sp. is a species-specific pollinator of F. beipeiensis, so the gall rate is lower; 3) The high mortality of Ceratosolen sp. results in low pollination rate; 4) The seed rate [25.64% ± 54.13% (N = 50)] is lower, ranging from 2% to 70%; 5) Seed germination is difficult under natural conditions.
An Algorithm to Find the Optimal Matching in Halin Graphs
Yunting Lu,Yueping Li,Dingjun Lou
IAENG International Journal of Computer Science , 2007,
Abstract:
Sex-Dependent Correlations between the Personality Dimension of Harm Avoidance and the Resting-State Functional Connectivity of Amygdala Subregions
Ying Li, Wen Qin, Tianzi Jiang, Yunting Zhang, Chunshui Yu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035925
Abstract: Harm avoidance (HA) is a personality dimension involving the tendency to respond intensely to signals of aversive stimuli. Many previous neuroimaging studies have associated HA scores with the structural and functional organization of the amygdala, but none of these studies have evaluated the correlation between HA score and amygdala resting-state functional connectivity (rsFC). Moreover, the amygdala is not a homogeneous structure, and it has been divided into several structurally and functionally distinct subregions. Investigating the associations between HA score and properties of subregions of the amygdala could greatly improve our understanding of HA. In the present study, using a large sample of 291 healthy young adults, we aimed to uncover correlations between HA scores and the rsFCs of each amygdala subregion and to uncover possible sex-based differences in these correlations. We found that subregions of the amygdala showed different rsFC patterns, which contributed differently to individual HA scores. More specifically, HA scores were correlated with rsFCs between the laterobasal amygdala subregion and temporal and occipital cortices related to emotional information input, between the centromedial subregion and the frontal cortices associated with emotional output control, and between the superficial subregion and the frontal and temporal areas involved in both functions. Moreover, significant gender-based differences were uncovered in these correlations. Our findings provide a more detailed model of association between HA scores and amygdala rsFC, extend our understanding of the connectivity of subregions of the amygdala, and confirm sex-based differences in HA associations.
The Neuronal Correlates of Digits Backward Are Revealed by Voxel-Based Morphometry and Resting-State Functional Connectivity Analyses
Rui Li, Wen Qin, Yunting Zhang, Tianzi Jiang, Chunshui Yu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0031877
Abstract: Digits backward (DB) is a widely used neuropsychological measure that is believed to be a simple and effective index of the capacity of the verbal working memory. However, its neural correlates remain elusive. The aim of this study is to investigate the neural correlates of DB in 299 healthy young adults by combining voxel-based morphometry (VBM) and resting-state functional connectivity (rsFC) analyses. The VBM analysis showed positive correlations between the DB scores and the gray matter volumes in the right anterior superior temporal gyrus (STG), the right posterior STG, the left inferior frontal gyrus and the left Rolandic operculum, which are four critical areas in the auditory phonological loop of the verbal working memory. Voxel-based correlation analysis was then performed between the positive rsFCs of these four clusters and the DB scores. We found that the DB scores were positively correlated with the rsFCs within the salience network (SN), that is, between the right anterior STG, the dorsal anterior cingulate cortex and the right fronto-insular cortex. We also found that the DB scores were negatively correlated with the rsFC within an anti-correlation network of the SN, between the right posterior STG and the left posterior insula. Our findings suggest that DB performance is related to the structural and functional organizations of the brain areas that are involved in the auditory phonological loop and the SN.
Changes of Editing Process of Scientific Journals Caused by Computer Network
计算机网络化给科技期刊编辑流程带来的变革

Wang Yunting,Wang Li,
王云亭
,王莉

中国科技期刊研究 , 2000,
Abstract: 探讨如何利用网络的优势促进编辑流程的变革。要积极开发期刊稿件管理软件,改进传统编辑流程;要利用网络的优势,增进编辑流程的科学性;提出建立纸型版和电子版期刊一体化生产、编辑校一体化的网络化期刊生产线,是编辑和科技期刊管理工作者的当务之急。
Effects of nitrogen deposition on ectomycorrhizal fungi
氮沉降对外生菌根真菌的影响

XUE Jinghu,MO Jiangming,LI Jiong,FANG Yunting,LI Dejun,
薛璟花
,莫江明,李炯,方运霆,李德军

生态学报 , 2004,
Abstract: As a result of increasing anthropogenic nitrogen deposition, N availability in many forest ecosystems, which are normally N-limited, has been enhanced. Increased N availability may impact the ectomycorrhizal fungi (EMF) that are generally regarded as an adaptation to nutrient limited conditions. Based on available scientific knowledge the effects of nitrogen deposition on ectomycorrhizal fungi, including the formation of EMF, the change of extraradical mycelium and mycorrhizal, the productivity of the fruiting bodies and EMF structure are reviewed in this paper. The potential impacts were related to the following three aspects. Elevated nitrogen deposition would (1) affects the nutrient allocation and cycle between EMF and autoecious trees; (2) lead to a reduction of the productivity of fruit body, of the production of extraradical mycelium in soil, of the ectomycorrhizal fungal sporocarp abundance, and of the numbers and the productivity of mycorrhizal; (3) change structure and the function of the ectomycorrhizal fungal community. The critical load of forest nitrogen saturation and future research on EMF is also discussed in this paper.
Micro bubble formation and bubble dissolution in domestic wet central heating systems
Fsadni Andrew M.,Ge Yunting
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122501016
Abstract: 16 % of the carbon dioxide emissions in the UK are known to originate from wet domestic central heating systems. Contemporary systems make use of very efficient boilers known as condensing boilers that could result in efficiencies in the 90-100% range. However, research and development into the phenomenon of micro bubbles in such systems has been practically non-existent. In fact, such systems normally incorporate a passive deaerator that is installed as a ‘default’ feature with no real knowledge as to the micro bubble characteristics and their effect on such systems. High saturation ratios are known to occur due to the widespread use of untreated tap water in such systems and due to the inevitable leakage of air into the closed loop circulation system during the daily thermal cycling. The high temperatures at the boiler wall result in super saturation conditions which consequently lead to micro bubble nucleation and detachment, leading to bubbly two phase flow. Experiments have been done on a test rig incorporating a typical 19 kW domestic gas fired boiler to determine the expected saturation ratios and bubble production and dissolution rates in such systems.
Impact of nitrogen deposition on forest plants
氮沉降对森林植物的影响

LI Dejun,MO Jiangming,FANG Yunting,PENG Shaolin,Per Gundersen,
李德军
,莫江明,方运霆,彭少麟,Per Gundersen

生态学报 , 2003,
Abstract: Human activities such as combustion of fossil fuels, intensive agriculture and stockbreeding, have significantly altered the global nitrogen cycle in the last several decades, increasing the concentrations of nitrogenous compounds in the atmosphere and rising the consequent N deposition to the global surface by several folds. As N is usually a limiting nutrient in most terrestrial ecosystems, additional N inputs to forest ecosystems may influence the growth, functioning and dynamics of those receiving forests. Based on available scientific evidence, we reviewed the impacts of N deposition on forest plants. The potential impacts were related to the following six aspects: (1) N deposition to some degree promotes photosynthetic rate, which is significantly correlated with leaf N concentration, as N deposition increases the leaf N concentration. However, when N deposition exceeds the nutritional demands of plants, it would reduce net photosynthesis by decreasing the concentrations of chlorophyll and Rubisco and activity of Rubisco in the leaves. (2) As N deposition increases the availability of N in soils, it would increase the productivity of plants at least in the short term. However, excess N inputs would lead to a reduction of productivity of plants. (3) Excess N deposition lead to an increasing leaching loss of cations as counterbalancing ions of leached nitrate, resulting in reduced amounts of exchangeable cations in forest soil. . Moreover, soil acidification promoted by N deposition increases the mobilization of toxic Al 3 . These combined with disproportionately high N concentration in soil lead to nutritional imbalance in plants. (4) N deposition is likely to cause a morphological change of plants, especially on the shoot/root ratios, because N deposition tends to promote growth of aboveground plants and inhibit root growth. (5) The susceptibility of plants to secondary stress factors such as frost, drought and fungal pathogens or insect pests, is increased by high N loading. (6) N deposition changes species composition and decrease plant diversity in forest ecosystems.
Characterization of ambient air pollution in Beijing caused by agricultural burning
麦秸焚烧导致的北京市大气污染时空分布和化学组成特征分析

LI Jinxiang,ZHAO Yue,LI Lingjun,YANG Xiaoguang,LI Haijun,DONG Xin,LI Yunting,
李金香
,赵越,李令军,杨晓光,李海军,董欣,李云婷

环境科学学报 , 2008,
Abstract: 为了全面评价农田秸秆焚烧产生的污染事件,并为制定有效的管理措施提供依据,于2006年6月20日监测了西南风下北京南部农田麦秸焚烧产生的污染物向北京传输的过程.获得了SO2、CO、NOx以及可吸入颗粒物(PM10)质量浓度的数据.颗粒物的化学组分数据.数据分析结果表明,污染输送对北京市西南部地区空气质量影响最大(PM10小时浓度超过600μg·m-3),对北部山区影响较小(PM10浓度峰值在110μg·m-3).高浓度污染在市区持续时间最长.麦秸焚烧通过输送增加了PM10(尤其是PM1)、CO、NO2以及NMHC等污染物质,这使得与前一日相比污染物之间的相关关系发生了变化:SO2与其它污染物的相关性不显著,而CO与NO2、CH4与NO显著相关.因子分析进一步揭示,气象条件对污染物浓度变化具有主导作用,而由麦秸焚烧所产生的外来污染源属于次要地位.污染输送过程中,PM25中的硝酸盐类和有机碳、碳黑质量浓度增大.麦秸焚烧所输送的气态污染物和细小颗粒物对人体健康存在威胁,在不利扩散的气象条件下在大气中存留时间加长.研究结果表明,气象条件不利于污染扩散时必须禁止农田秸秆焚烧.
Correlation among SDS Sedimentation Value, Swelling Index of Glutenin and Solvent Retention Capacity of Spring Wheat
Deyong ZHAO,Lei WANG,Yunting LEI
Notulae Scientia Biologicae , 2012,
Abstract: The determination of flour end-use quality of progenies is a routine process in high-quality wheat breeding program. Traditional determination involves larger amount of flour and specific instruments, meanwhile, is expensive and time-consuming. A rapid and accurate method which could predict the quality of early generation wheat lines is in high demand in the wheat breeding program. Clarifying the relationships among different prediction indexes is the prerequisite for devising a new prediction method screening the high-quality progenies. This study aimed to clarify the correlations between SDS sedimentation value, SIG and SRCs for both wholemeal flour and flour, as well as to study which parameter could be applied to predict the flour quality of spring wheat rapidly and conveniently. The result of the study showed that WSRC correlated significantly with all the parameters determined, the four different SRCs varied significantly between hard wheat and soft wheat, while SDS sedimentation value and SIG showed no significant difference between hard wheat and soft wheat. SRC test may provide a convenient method for predicting the quality of early generation wheat lines in wheat breeding.
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