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Search Results: 1 - 10 of 15305 matches for " Yun;She "
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N2O emissions from agricultural soils in the North China Plain:the effect of chemical nitrogen fertilizer and organic manure
DONG Yun-she,Dieter Scharffe,Manfred Domroes,QI Yu-chun,ZHANGShen,
DONG Yun-she
,Dieter Scharffe,Manfred Domroes,QI Yu-chun,ZHANGShen

环境科学学报(英文版) , 2000,
Abstract: An enclosed chamber technique was used to measure N2O emissions from intensively agricultural soils of the North China Plain during the periods of 1995-1996 and 1997-1998, to reflect distinct components of winter wheat and summer maize growing seasons. The results showed that the continuous application of fertilizer in agricultural soils increased N2O emissions by a factor of 24. 1-28.1, the calculated annual chemical N fertilizer-transformed N2O-N emissions was 0.67%. Our results indicated that the application of organic manure also had a significant influence on soil N2O emissions, which combined with the use of chemical N increased about 20% in a year. It was calculated that there were about 0.11% N of organic manure transformed as N2O-N. Annual mean N2O emission from our study area of fertilized soils was estimated to be 57.1 μgN2O/(m2 @ h). A weak correlation was also found between. N2O emissions and soil available nitrogen content NH+4 .
Advances in Research of the Structure and Function of Plant Centromeres

SHE Chao-Wen,SONG Yun-Chun,

遗传 , 2006,
Abstract: Centromeres are the chromosomal domains necessary for faithful chromosome segregation and transmission during mitosis and meiosis in eukaryotes. In the last decade, centromeres in some plant species including Arabidopsis, rice and maize have been deeply studied at molecular level. Centromeric DNAs evolve rapidly and are little conserved among various plants, but the types of centromeric DNA sequences and their organization patterns within centromeres are basically similar in plants. Plant centromeres are usually composed of clusters of tandemly arrayed satellite repeats that are interspersed with centromere-specific retrotransposons. In contrast to centromeric DNA, structural and transient centromeric/kinetochoric proteins are conserved among eukaryotes including plants. As the cases in other eukaryotes, the presence of CENH3 (centromeric histone H3)-containing nucleosomes is the fundamental feature of plant functional centromeres, and CENH3 plays critical roles in the identity and maintenance of plant centromeric chromatin.
Progress of Plant FISH Technique and Its Applications in the Analysis of Plant Genome

SHE Chao-Wen,SONG Yun-Chun,

植物科学学报 , 2006,
Abstract: Fluorescence in situ hybridization(FISH) is an effective and accurate molecular cytogenetic tool for mapping specific DNA sequences on chromosomes,interphase nuclei and DNA fibers.Rapid advances in plant FISH technique have been made in the past two decades.Dual FISH,multicolor FISH and multiprobe FISH cocktail have been developed to increase the number of detected targets;BAC-FISH and tyramide signal amplification FISH(TSA-FISH) have been applied to increase the detection(sensiti-)(vity) of very small chromosomal targets;and high resolution FISH such as pachytene FISH,interphase FISH,fiber FISH and FISH on super-stretched flow-sorted plant chromosome have been developed mainly to improve the spatial resolution of signals derived from flanking sequences.FISH have played important roles in the analysis of plant genome.It can physically map specific DNA sequences,provide effective marks for chromosome identification within a genome,investigate the evolution of plant genome by comparative mapping of the same DNA sequences in related species,construct the physical map of plant genome,directly reveals the DNA molecular organization of a specific chromosome regions,analyze the organization pattern of interphase chromatin and the dynamic changes of chromosomes in cell cycle,and characterize transgenes in plant genomes.
NitrousOxide Em issionsfrom Soiland Som eInfluence Factors

QIYu-chun,DONG Yun-she,

地理学报 , 1999,
Abstract: The global change is very important to the change of environment of human beings. The increasing of carbon dioxide, methane, nitrous oxide and other greenhouse gases in atmosphere is one of the main inducement to the global climate change. The study on greenhouse gases has always been the topic of general interest. Among greenhouse gases, interest in the increasing of atmospheric nitrous oxide (N2O) has been stimulated by the understanding that this gas plays an important role in the chemistry of the stratosphere and the ozone layer destruction, its long life time in the atmosphere and a significant influence on the earth thermal balance by the absorption of long wave infrared radiation (the greenhouse effect). It is important to understand the sources and sinks, production mechanisms and mitigation measures of the greenhouse gases. In this paper, we will generally discuss about the relevant study progress of N2O emission in the recent years.
Effect of Temperature on Photoluminescence of SiNx Films Deposited by Plasma Enhanced Chemical Vapor Deposition
JIANG Yi-xiang,YUAN Jin-she,ZOU Xiang-yun
Journal of Chongqing Normal University , 2012,
Abstract: SiNx film has widely been used in the surface of crystalline silicon solar cells as antireflection and passivation film. Therefore, research on the optical properties of SiNX film is very important. In this paper, under different growth temperature, silicon nitride (SiNX) thin films were deposited successfully on Si (111) substrates by plasma enhanced chemical vapor deposition (PECVD). Photoluminescence(PL)spectra was measured at room temperature under 352 nm light. We observed 390 nm, 471 nm, 545 nm and 570 nm peaks and found that temperature had no effect on the peak position of 390 nm light. The impurities existed in the film possible formed localized defect energy levels in the band gap and the transition between the conduction band and the valence band became the main transition. Therefore, we can control the film growth conditions to control the density of each defects state level, which can be achieved to control the silicon nitride film photoluminescence in the visible light range.
Prediction of temperature distribution in turbulent Rayleigh-Benard convection
Zhen-Su She,Xi Chen,Hong-Yue Zou,Yun Bao,Jun Chen,Fazle Hussain
Physics , 2014,
Abstract: A quantitative theory is developed for the vertical mean temperature profile (MTP) in turbulent Rayleigh-Benard convection (RBC), which explains the recent experimental and numerical observations of a logarithmic law by Ahlers et al.(Phys. Rev. Lett., 2012). A multi-layer model is formulated and quantified, whose predictions agree with DNS and experimental data for the Rayleigh-number (Ra) over seven decades. In particular, a thermal buffer layer follows a 1/7 scaling like the previously postulated mixing zone (Procaccia et al, Phys. Rev. A,1991), and yields a Ra-dependent log law constant. A new parameterization of Nu(Ra) dependence is proposed, based on the present multi-layer quantification of the bulk MTP.
The Magnetic Field Distribution of Type II Superconductors Based on the Modified GL Equations  [PDF]
Ruiqi Huang, Weilong She
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.44077

The standard Ginzburg-Landau (GL) equations are only valid in the vicinity of the critical temperature. Based on the Eilenberger equations for a single band and s-wave superconductor, we derive a modified version of the standard GL equations to improve the applicability of the standard formalism at temperature away from the critical temperature. It is shown that in comparison with previous studies, our method is more convenient to calculate and our modified equations are also compatible with a dirty superconductor. To illustrate the usefulness of our formalism, we solve the modified equations numerically and give the magnetic field distribution in the mixed state at any temperature. The results show that the vortex lattice could be still observed even away from the critical temperature (e.g., T/Tc = 0.3).

Meta-Analysis on Safety of Dapagliflozin in Patients with Type 2 Diabetes Mellitus  [PDF]
Lili She, Hongyan Wu
Yangtze Medicine (YM) , 2018, DOI: 10.4236/ym.2018.23014
Abstract: Objective: To evaluate the safety of dapagliflozin for Type 2 Diabetes Mellitus (T2DM). Methods: A systematic search of Pubmed, Embase, Cochrance Library, Web of Science, CNKI, Wanfang Data and VIP database for randomized controlled trials (RCTs) comparing dapagliflozin with placebo was performed up to February 2018. The index words included dapagliflozin, type 2 diabetes mellitus and randomized controlled trial. Results: A total of 19 RCTs involving 7704 participants were incorporated into the study. Compared with placebo, dapagliflozin did not increase the risk of hypoglycemia [OR = 1.14, 95%CI (0.95, 1.36), P = 0.17] and hypotension [OR = 1.43, 95%CI (0.94, 2.17), P = 0.10], but significantly increased the incidences of renal adverse events [OR = 1.57, 95%CI (1.17, 2.09), P = 0.002], genital tract infection [OR = 3.65, 95%CI (2.93, 4.56), P < 0.00001] and urinary tract infection [OR = 1.36, 95%CI (1.15, 1.61), P = 0.0004] and related doses. Conclusions: Generally, dapagliflozin had no risk of hypoglycemia and hypotension in patients with T2DM, but there were risks of renal adverse events and urogenital tract infection. Due to the limitations of this study, larger samples and RCTs with long-term follow-up are needed for further verification.
Effect of trimetazidine treatment on the transient outward potassium current of the left ventricular myocytes of rats with streptozotocin-induced type 1 diabetes mellitus
Xiang, Yu-luan;He, Li;Xiao, Jun;Xia, Shuang;Deng, Song-bai;Xiu, Yun;She, Qiang;
Brazilian Journal of Medical and Biological Research , 2012, DOI: 10.1590/S0100-879X2012007500019
Abstract: cardiovascular complications are a leading cause of mortality in patients with diabetes mellitus (dm). the present study was designed to investigate the effects of trimetazidine (tmz), an anti-angina drug, on transient outward potassium current (ito) remodeling in ventricular myocytes and the plasma contents of free fatty acid (ffa) and glucose in dm. sprague-dawley rats, 8 weeks old and weighing 200-250 g, were randomly divided into three groups of 20 animals each. the control group was injected with vehicle (1 mm citrate buffer), the dm group was injected with 65 mg/kg streptozotocin (stz) for induction of type 1 dm, and the dm + tmz group was injected with the same dose of stz followed by a 4-week treatment with tmz (60 mg·kg-1·day-1). all animals were then euthanized and their hearts excised and subjected to electrophysiological measurements or gene expression analyses. tmz exposure significantly reversed the increased plasma ffa level in diabetic rats, but failed to change the plasma glucose level. the amplitude of ito was significantly decreased in left ventricular myocytes from diabetic rats relative to control animals (6.25 ± 1.45 vs 20.72 ± 2.93 pa/pf at +40 mv). the dm-associated ito reduction was attenuated by tmz. moreover, tmz treatment reversed the increased expression of the channel-forming alpha subunit kv1.4 and the decreased expression of kv4.2 and kv4.3 in diabetic rat hearts. these data demonstrate that tmz can normalize, or partially normalize, the increased plasma ffa content, the reduced ito of ventricular myocytes, and the altered expression kv1.4, kv4.2, and kv4.3 in type 1 dm.
Imaging of the Al Structure of an Ultrathin Alumina Film Grown on Cu-9 at.%Al(111) by STM

ZHANG Yun,YU Ying-Hui,SHE Li-Min,QIN Zhi-Hui,CAO Geng-Yu,

中国物理快报 , 2011,
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