oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 1 )

2017 ( 125 )

2016 ( 143 )

2015 ( 1864 )

自定义范围…

匹配条件: “GUO Jun-jie” ,找到相关结果约75176条。
列表显示的所有文章,均可免费获取
第1页/共75176条
每页显示
Relative expression of SOD and CAT mRNA and activities of SOD and CAT in grafted cucumber leaves under NaCl stress.
氯化钠胁迫下嫁接黄瓜叶片SOD和CAT mRNA基因表达及其活性

GAO Jun-jie,ZHANG Lin,QIN Ai-guo,YU Xian-chang,
GAO Jun-jie
,张琳,QIN Ai-guo,于贤昌

应用生态学报 , 2008,
Abstract: 研究了NaCl胁迫下嫁接和自根黄瓜叶片Cu/Zn-SOD、Mn-SOD和CAT mRNA的表达与其酶活性变化及其MDA含量和电解质渗漏率变化.结果表明:在NaCl胁迫条件下,嫁接黄瓜叶片Cu/Zn-SOD mRNA、Mn-SOD mRNA和CAT mRNA的相对表达量均高于自根黄瓜,SOD、Cu/Zn-SOD、Mn-SOD和CAT活性也均高于自根黄瓜,说明与自根黄瓜相比,嫁接黄瓜叶片较高的Cu/Zn-SOD mRNA、Mn-SOD mRNA和CAT mRNA相对表达量是其维持较高Cu/Zn-SOD、Mn-SOD和CAT活性的重要原因;随着NaCl胁迫时间的延长,嫁接和自根黄瓜叶片Cu/Zn-SOD mRNA、Mn-SOD mRNA和CAT mRNA的相对表达量均呈上升趋势,但其酶活性变化并不完全一致,说明还有其他因素参与相关酶活性的调控;嫁接黄瓜叶片MDA含量和电解质渗漏率均低于自根黄瓜,说明嫁接黄瓜具有较高的活性氧清除系统,可以减少活性氧物质的危害,提高其耐盐性.
Deposition of Bi2O3 Thin Films and Their Resistive Switching Characteristics
JI Zhen-Guo, WANG Jun-Jie, MAO Qi-Nan, XI Jun-Hua
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.00323
Abstract: Resistive random access memory (ReRAM) is one of the most promising candidates for next generation high speed nonvolatile memory devices. Bi2O3 thin films were deposited on heavily doped silicon wafer by RF magnetron sputtering, and the crystalline structure of the Bi2O3 thin films were characterized by XRD. The resistive switching characteristics of the Au/Bi2O3/n+Si/Al structure and the dependence of the ReRAM behavior on the thickness of the Bi2O3 thin films were studied. XRD analysis shows that the Bi2O3 thin films have good crystalline quality with (201) preferential orientation, while I―V curves results indicate that Bi2O3 thin films exhibit reversible and steady unipolar resistive switching behaviors. It is further found that the forming voltages, set voltages, and reset voltages depend linearly on the thickness of Bi2O3 thin films, and for the device with the thickness of 31.2 nm, these three threshold voltages are all below 4 V, which meet the need of low voltage operation of the memories.
Effects of WO3 Contents on the Thermal and Spectroscopic Properties of Tm3+-doped TeO2-WO3-La2O3Glasses
LI Ke-Feng,WANG Guo-Nian,HU Li-Li,ZHANG Jun-Jie,HU Jun-Jiang
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.00429
Abstract: Tungstenlanthanumtellurite (TWL) glasses with the molar composition (90-x)TeO2-xWO3-9La2O3-1Tm2O3(x=10, 20, 30(mol%)) were prepared. Effects of WO3 contents on the thermal stability and spectroscopic properties of Tm3+ doped TWL glasses were studied. It is found that the thermal stability of TWL glasses is improved with the increasing WO3 contents. For the glass with 30mol% WO3, the glass transition temperature(Tg) is 457℃, while onset crystallization temperature(Tx) is not observed in DTA curve, and the thermal expansion coefficient of the glass decreases to 1.224×10-5/℃ (30-300℃). The maximum phonon energy of the glasses shows the dependence on the host composition. The spectroscopic intensity parameters (Ωt t=2,4,6), radiative transition rates, radiative lifetimes, and branching ratios are calculated by Judd-Ofelt theory. The emission crosssection of Tm3+: 3F4→3H6 transition is calculated by McCumber theory. The maximum emission crosssection of Tm3+ in 60TeO2-30WO3-9La2O3-1Tm2O3 glass is 9.6×10-21cm2. Evaluated from the thermal and spectroscopic properties, 60TeO2-30WO3-10La2O3 glass is a promising host material for ~2.0μm laser.
Effects of high-and low temperature stresses on ascorbic acid metabolism system in potato leaves
温度胁迫对马铃薯叶片抗坏血酸代谢系统的影响

QIN Ai-guo,GAO Jun-jie,YU Xian-chang,
秦爱国
,高俊杰,于贤昌

应用生态学报 , 2009,
Abstract: In order to investigate the responses of aseorbic acid (AsA) metabolism system in potato leaves to high and low temperature stresses, a pot experiment was conducted with potato plants exposed to 40 ℃ or 5 ℃, with the leaf AsA content, mRNA expression level of GalLDH and DHAR genes, activities of GalLDH, DHAR, APX, MDHAR and GR, and contents of hydrogen peroxide (H_2O_2) and malondialdehyde (MDA) determined. Under the exposure to 40 ℃, the leaf AsA content increased rapidly and reached the highest (43.7% higher than the control) at 6 h, followed by a rapid decrease. Under the exposure to 5 ℃, the AsA content also increased first, reached the highest (27. 7% higher than the control) at 9 h, and then decreased. Under the two temperature regimes, the activities of leaf GalLDH, DHAR, APX, MDHAR and GR decreased after an initial increase, the mRNA expression level of GalLDH and DHAR genes showed the similar changes with their corresponding enzyme activities, and the leaf MDA and H_2O_2 contents increased remarkably after 24 h. All the results suggested that the AsA metabolism system in potato leaves was stimulated in the early period of high- and low temperature stresses, but its function declined gradually with the duration of the stresses.
Algorithm of Simplifying the Image Emotion Semantic Rules
图像情感语义规则简化学习算法

ZHAO Juan-juan,CHEN Jun-jie,LI Guo-qing,
赵涓涓
,陈俊杰,李国庆

计算机科学 , 2009,
Abstract: This article discussed the significance of studying the semantic rules of image emotion.It gave the concept of rough set and described the learning algorithm about minimal-and-maximal rules.The author put forward the method of simplifying the semantic rules in image emotion by using this learning algorithm.Firstly,used the attribute reduction of rough set to simplify the train set.Then,got the rule set by using the decision tree algorithm.Finally,applied the lear-ning algorithm about minimal-and-maximal rul...
ISAR Imaging Algorithm Based on Sparse Representation and Time-frequency Transform
基于稀疏表示和时频变换的ISAR成像算法

WANG Bao-ping,SUN Chao,GUO Jun-jie,
王保平
,孙超,郭俊杰

计算机科学 , 2013,
Abstract: Inverse synthetic aperture radar images maneuvering targets, and during the coherent processing interval time, imaging projection plane and the scale of cross-range change with time, so many parameters are difficult to accu- rately extract and more prior knowledge can't be acquired. In general, the robust rangcdoppler (RD) imaging algorithm is used. But the conventional RI)imaging algorithm is based on the hypothesis of the target rotating uniformly and sam- pling uniformity in azimuth. For maneuvering target imaging, RD algorithm will make the image fuzzy. Especially for ra- dar gapped data, the performance of imaging descends greatly and even cant be identified. This paper introduced a range instantaneous Doppler imaging algorithm based on sparse representation and time-frectuency transform which can effec- tively image the maneuvering target. hhe experimental results validate the effectiveness and feasibility of this approach.
OPTICAL-PHONON MODES AND ELECTRON-OPTICAL-PHONON INTERACTION IN A COUPLED QUANTUM WELL

SHI JUN-JIE,

中国物理 B , 1996,
Abstract:
ELECTRON-INTERFACE PHONON SCATTERING IN ASYMMETRIC SEMICONDUCTOR QUANTUM WELL STRUCTURES

SHI JUN-JIE,

中国物理 B , 1995,
Abstract: Electron-interface phonon scattering rates in asymmetric single quantum well and step quantum well structures are calculated by means of the interaction Fr?hlich-like Hamiltonian between an electron and interface optical phonons in a four-layer heterostructure given re-cently. The intrasubband and intersubband electron scattering rates are given as functions of quantum well width, step width and step height. We have found that the electron scattering depends strongly on the potential parameters and the usual selection rules for these tran-sitions are broken down in asymmetric heterostructures; the interface LO modes are more important than the interface TO modes for the electron-interface phonons scattering in het-erostructures; the intrasubband scattering rates are insensitive functions of step width and step height, and the intersubband scattering rates are complicated functions of step height and step width in step quantum wells. Moreover, we have also observed that the scattering rates for intrasubband and intersubband transitions have no obvious changes in the case that the first or second subband energy level crosses the step height in a step quantum well.
Psychiatric Illness and Intellectual Disability in the Prader–Willi Syndrome with Different Molecular Defects - A Meta Analysis
Lin Yang, Guo-dong Zhan, Jun-jie Ding, Hui-jun Wang, Duan Ma, Guo-ying Huang, Wen-hao Zhou
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0072640
Abstract: Background and Objectives Several studies have suggested a difference in clinical features of intellectual ability and psychiatric illness in the Prader–Willi syndrome (PWS) with the 15q11-q13 paternal deletion and maternal uniparental disomy (mUPD). Our objective was to appraise evidence on this association through a meta-analysis. Methods The electronic records PubMed and EMBASE from 1956 to 2012 were extracted for meta-analysis. Meta-analyses were performed by using fixed effect model. Mean difference, odds ratio, and 95% confidence interval were calculated. Results We retrieved a total of 744 PWS cases from 13 studies. These include 423 cases with paternal 15q11-q13 deletions and 318 cases of mUPD. Compare to the PWS cases with mUPD, PWS patients with the paternal 15q11-q13 deletion associated with significantly lower full scale IQ (FSIQ) [mean difference (MD), -2.69; 95%CI, -4.86 to -0.52; p=0.02] and verbal IQ (VIQ) (MD, -7.5; 95%CI, -9.75 to -5.26; p<0.00001) but higher performance IQ (PIQ) (MD, 4.02; 95%CI, 1.13 to 6.91; p=0.006). In contrast, PWS patients with mUPD are associated with significantly higher risk of psychiatric illness [odds rate (OR), 0.14; 95%CI, 0.08 to 0.23; p<0.00001] and higher risk of bipolar disorder (OR, 0.04; 95%CI, 0.01 to 0.23; p=0.0002). Conclusions Significant different clinical features of cognitive development and psychiatric illness are associated with PWS with different molecular defects. These findings provide support for evidence based practice to evaluate and manage the PWS syndrome with different molecular defects.
Sensitive and Specific Target Sequences Selected from Retrotransposons of Schistosoma japonicum for the Diagnosis of Schistosomiasis
Jun-Jie Guo equal contributor,Hua-Jun Zheng equal contributor,Jing Xu,Xing-Quan Zhu,Sheng-Yue Wang ,Chao-Ming Xia
PLOS Neglected Tropical Diseases , 2012, DOI: 10.1371/journal.pntd.0001579
Abstract: Background Schistosomiasis japonica is a serious debilitating and sometimes fatal disease. Accurate diagnostic tests play a key role in patient management and control of the disease. However, currently available diagnostic methods are not ideal, and the detection of the parasite DNA in blood samples has turned out to be one of the most promising tools for the diagnosis of schistosomiasis. In our previous investigations, a 230-bp sequence from the highly repetitive retrotransposon SjR2 was identified and it showed high sensitivity and specificity for detecting Schistosoma japonicum DNA in the sera of rabbit model and patients. Recently, 29 retrotransposons were found in S. japonicum genome by our group. The present study highlighted the key factors for selecting a new perspective sensitive target DNA sequence for the diagnosis of schistosomiasis, which can serve as example for other parasitic pathogens. Methodology/Principal Findings In this study, we demonstrated that the key factors based on the bioinformatic analysis for selecting target sequence are the higher genome proportion, repetitive complete copies and partial copies, and active ESTs than the others in the chromosome genome. New primers based on 25 novel retrotransposons and SjR2 were designed and their sensitivity and specificity for detecting S. japonicum DNA were compared. The results showed that a new 303-bp sequence from non-long terminal repeat (LTR) retrotransposon (SjCHGCS19) had high sensitivity and specificity. The 303-bp target sequence was amplified from the sera of rabbit model at 3 d post-infection by nested-PCR and it became negative at 17 weeks post-treatment. Furthermore, the percentage sensitivity of the nested-PCR was 97.67% in 43 serum samples of S. japonicum-infected patients. Conclusions/Significance Our findings highlighted the key factors based on the bioinformatic analysis for selecting target sequence from S. japonicum genome, which provide basis for establishing powerful molecular diagnostic techniques that can be used for monitoring early infection and therapy efficacy to support schistosomiasis control programs.
第1页/共75176条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.