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Seasonal Variability in Soil Inorganic Nitrogen Across Borders Between Woodland and Farmland in the Songnen Plain of Northeast China

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Pedosphere 2013年第4期23卷 472-481页

作者： liN Chang-Cun FU Yao liU li wang Kun wang de-li The Academy of Forestry Beijing Forestry University department of Grassland Science China Agricultural University Institute of Grassland Science Key Laboratory of Vegetation Ecology Northeast Normal University and Key Laboratory of Ecological Restoration and Ecosystem Management of Jilin Province Chinese Research Academy of Environmental Sciences

To study the seasonal variability of soil inorganic nitrogen （N） across borders at the woodland-farmland ecotone and potential mechanisms, contents of soil inorganic N were measured during the dry season （May 20 and June 30） and the rainy season （August 10 and September 20） of 2006 in the Songnen Plain of Northeast China. The borders between farmland and woodland were determined by a border-and-ecotone detection analysis （BEDA）. The ecotone limits, often referred to as the depth-of-edge influence （deI）, are critical for determining the scale at which edge effect operates. The results showed that the soil inorganic N border between the woodland and farmland was located further toward the woodland interior during the rainy season （deI -- 53.4 ：k 8.7 m, August 10） than during the dry season （deI = 35.0 =k 12.6 m, May 20）. The seasonal variability in the soil inorganic N border was found to be associated with seasonal changes of deposition flux of N （the correlation coefficients between them for the dry season and rainy season were 0.61 and 0.67, respectively）, which resulted from foliation patterns of trees and crops. Accordingly, the leaf area index at woodland edges was lower than that in the woodland interior, so woodland edges captured large amounts of atmosphere nitrogen deposition. The average deI was 44.1 m, which was in accordance with the values of other temperate forest boundaries in literatures; therefore, BEDA was an appropriate method to estimate the borders of ecotones.

关键词： depth-of-edge influence ecotone semi-arid woodland edge

development and characterization of wheat–Aegilops kotschyi 1U^(k)(1A)substitution line with positive dough quality parameters

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Journal of Integrative Agriculture 2023年第4期22卷 999-1008页

作者： JIANG Yun wang de-li HAO Ming ZHANG Jie liU deng-cai State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural UniversityChengdu 611130P.R.China Biotechnology and Nuclear Technology Research Institute Sichuan Academy of Agricultural SciencesChengdu 610061P.R.China Triticeae Research Institute Sichuan Agricultural UniversityChengdu 611130P.R.China

Exploring novel high molecular weight glutenin subunits(HMW-GSs)from wild related species is a strategy to improve wheat processing *** objective of the present investigation was to identify the chromosomes of the wheatalien introgression line N124,derived from the hybridization between Triticum aestivum with Aegilops kotschyi,and characterize the effects on quality-related *** in situ hybridization karyotypes showed that N124 is a disomic 1U^(k)(1A)substitution *** dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE)and reversedphase high-performance liquid chromatography verified N124 expressed two HMW-GSs of the *** *** RNA sequencing and phylogenetic analysis confirmed that the two HMW-GSs were U^(k)x and U^(k)*** to the wheat parent,the substitution line had no obvious agronomic defects except fewer grains per spike but improved several major quality *** can be served as a donor or bridge material for wheat quality improvement.

关键词： Aegilops kotschyi common wheat 1Uk(1A)substitution line HMW-GS processing quality

Production and Properties of a Thickener with Ability of Suspending Sand

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Journal of China University of Mining and Technology 2006年第2期16卷 115-118,122页

作者： QIN Bo-tao wang de-ming li Zeng-hua CHEN jian-hua School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To overcome the shortcomings of pouring sands, a thickener with the ability to suspend sands was developed. It is mixed with sands to form densified slurry, and can insure the sands against deposition, jamming pipelines and de- hydration. The chemical structure of the thickener is introduced in this paper and the production process is studied. The main processes include immersion, decomposition, dilution and addition of additives. In order to produce a thickener with high viscosity to suspend sands, key factors must be controlled in each process: the immersion time is 2 h; the mass fraction of formaldehyde is 0.01% and mass of NaCO3 accounts for 15% of dry material; the water temperature is 65 ℃ in summer and 72 ℃ in winter and the decomposition time is 2 h in the reaction; the densified decomposition so- lution should be diluted to 1% mass fraction; the additives of calcium ions and pH indicators must be added to the di- luted liquid; the mass fraction of CaCl2 is 0.048% and the pH value of the solution is 7.5. The thickener is a gel with three-dimensional network structure, a liquid with non-Newtonian behaviour and the characteristics of pseudo-plastic material, a solution with little resistance and the ability to revive its oral primary viscosity. It has been successfully ap- plied in Shendong Mines and has great value and wide-spread prospective use.

关键词： thickener ability of suspending sand spontaneous combustion of coal

SIMULATION OF 3-D FLOW AROUND A VAN-BODY TRUCK WITH RNG K-ε TURBULENCE MOdeL

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Journal of Hydrodynamics 2001年第4期13卷 98-101页

作者： Du, Guang-Sheng wang, de-Chang Lei, li Zhou, lian-Di Coll. of Water Conservancy Wuhan Univ. Ji'nan 250061 China

It is proved that the calculation precision of the outside flow field of the van-body truck using PNG k-Ε turbulence model is higher than that using standard k-Ε turbulence model by means of experiments. The calculation results of the outside flow field of a certain domestic van-body truck are given. And by analyzing and comparing the different tail flow plots, the tail flow structural characteristics and the relationship between the position and the intensity of the tail vortex and the aerodynamic drag is obtained, which can direct the design of the outside aerodynamic shape of the van-body truck.

关键词： Computer simulation Drag Mathematical models Turbulent flow

development of Japonica Male Sterile lines Integrating Cytoplasmic Male Sterility and Photosensitive Genic Male Sterility

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Agricultural Sciences in China 2005年第12期4卷 883-889页

作者： wang Shou-hai DU Shi-yun wang de-zheng li Cheng-quan Institute of Rice Anhui Academy of Agricultural Sciences Hefei 230031 P.R.China

Acknowledgement It has been previously established that the BT type of cytoplasmic male sterility （CMS） is induced by high temperatures, while photosensitive genic male sterility （PGMS） seed sets by low temperatures induce. In the current study, we have bred photosensitive cytoplasmic male sterility （PCMS） lines （2308SA and 2310SA） by crossing the CMS line with the PGMS japonica line with maintainer genes. The sterility of PCMS japonica was consequently controlled by two groups of male sterile genes resulting from the integration of PGMS and CMS genes. The results on plant fertility, at different sowing times, were as follows：（a） Under conditions of natural long-day photoperiod and at temperatures above 35~C, the PGMS gene regulated PCMS japonica sterility - the higher the temperature, the lower the pollen fertility. However, bagged seed sets of PCMS japonica, not exposed to high temperatures, induced the CMS seed set. （b） Exposure to long-day photoperiod and temperature conditions between 35℃ and the critical sterility inducing temperature of PGMS resulted in both PGMS and CMS gene controlled sterility of PCMS japonica, which exhibited stable characteristics. （c） When exposed to critical sterility inducing temperatures or short-day photoperiod and daily high temperatures below 32℃, the BT type of the CMS gene regulated PCMS sterility. Under these conditions, the PGMS gene rendered male sterility insusceptible to occasional cool summer days when this PCMS line, adopted for hybrid seed production, develops into panicle differentiation stage. The present study also investigated the fertility restoration, seed production and combining ability of PCMS japonica so as to optimize its use.

关键词： Oryza sativa var. japonica Photosensitive genic male sterility Cytoplasmic male sterility Gene Photosensitive cytoplasmic male sterility

Nonverbal language in cross-cultural communication

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Sino-US English Teaching 2007年第10期4卷 66-70页

作者： wang de-hua li Hui School of Foreign Languages Ningbo Institute of Technology Zhejiang University Ningbo 315100 China

All cultures make use of nonverbal communication but the meanings of nonverbal communication vary across cultures. Nonverbal communication may be as important to understand as words are, for it can cause misunderstandings between people from different cultures if they misinterpret nonverbal symbols. Nonverbal communication is largely beyond our conscious, and the system we learn is not determined by the genetic heritage but by the socio-cultural environment. The differences across cultures in nonverbal signals have been studied widely, because of the importance and necessity in communication .The paper mainly focuses on the differences related to body language, body space, body touch and paralanguage.

关键词： body language body space paralanguage cross-cultural communication

Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： Song He li li Sai wang Shao-Jiang wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

Mitigated calcification of glutaraldehyde-fixed bovine pericardium by tannic acid in rats

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Chinese Medical Journal 2008年第17期121卷 1675-1679页

作者： wang de JIANG Hong li Jun ZHOU Jian-ye HU Sheng-shou Research Center for Cardiovascular Regenerative Medicine Ministry of Health Cardiovascular Institute and Fuwai Hospital Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100037 China

Background Bioprosthetic heart valves derived from glutaraldehyde （Glut）-fixed xenografts have been widely used to replace diseased cardiac valves. However, calcification and degeneration are common following their implantation. Inflammation is closely associated with calcification of Glut-fixed xenografts via macrophage infiltration. Tannic acid （TA） possesses anti-inflammatory effects. This study was designed to investigate the anti-calcification of TA treatment on the Glut-fixed bovine pericardium （BP） in a rat subdermal model. Methods Fresh BP was divided into two groups （10 in each group） and separately subjected to different fixation procedures as follows：（1） Glut group： fixation with 0.6% Glut alone; （2） Glut/TA group： fixation with 0.6% Glut and subsequent 0.3% TA. Then the BP samples were subdermally implanted in juvenile male Sprague-Dawley rats and explanted 21 days after implantation. Each explanted BP sample was divided into three parts for calcium content analysis von Kossa＇s staining and immunohistochemical staining, and reverse transcription-polymerase chain reaction study. Results The data from quantitative calcium analysis and von Kossa＇s staining showed that Glut-fixed BP developed significantly more calcification than Glut/TA-fixed BP （（90.3＋32.5） mg/g dry weight vs （6.4_＋1.3） mg/g dry tissue, P 〈0.01）. Immunostaining demonstrated lower matrix metalloproteinase-9 and tenascin-C expression as well as macrophage infiltration into Glut/TA-fixed BP than in its Glut-fixed counterpart （P 〈0.01 for all）. Additionally, the reverse transcription-polymerase chain reaction study showed that higher levels of expression of matrix metalloproteinase-9 and tenascin-C mRNA occurred within Glut-fixed BP than within the Glut/TA-fixed ones （P 〈0.01 for all）. Conclusion TA exerts excellent anti-calcification effects on Glut-fixed BP via inhibiting macrophage infiltration and expression of matrix metalloproteinase-9 and tenascin-C.

关键词： tannic acid calcification macrophage pericardium bioprosthesis xenograft

NUMERICAL MOdeliNG OF COMPOUND CHANNEL FLOWS

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Journal of Hydrodynamics 2002年第4期14卷 106-109页

作者： wang de-guan, Cheng li College of Water Resources and Environmental Engineering, Hohai University, Nanjing 210098, China College of Water Resources and Environmental Engineering Hohai University Nanjing 210098 China

A numerical model capable of predicting flow characteristics in a compound channel was established with the 3-D steady continuity and momentum equations along with the transport equations for turbulence kinetic energy and dissipation rate. Closure was achieved with the aid of algebraic relations for turbulent shear stresses. The above equations were discretized with implicit difference approach and solved with a step method along the flow direction. The computational results showing the lateral distribution of vertical average velocities and the latio of total flow in the compound channel agree well with the available experimental data.

关键词： compound channel flow discharge ratio of channel and floodplain turbulence