维普中文期刊产品整合服务
168篇 您的检索式:作者名="Mingfang"
    题名 作者 年代 出处 被引量
1Soil salinization research in China: Advances and prospects显示文摘与气候变化的进展引起的环境恶化,土壤 salinization 是一个严重、成长的全球问题。当前,大约 7% 世界陆地表面被 salinization 威胁。中国是其土壤被这个问题严重地影响的一个国家,它由于它的广泛的区域,并且宽分发形成严肃的威胁到地区性的农业开发。在这评论,我们在过去的 70 年在中国为土壤 salinization 研究总结框架,估计存在的软弱在两个研究国内、国际的上下文,加亮趋势并且给关于在过去的 30 年的盐的土壤的全球研究的调查结果调音,并且为关于盐的土壤的未来研究建议六个主要领域和方向。LI Jianguo PU Lijie HAN Mingfang ZHU Ming ZHANG Runsen XIANG Yangzhou 2014Journal of Geographical Sciences2014,24,5:90
2Identification of Flowering Regulatory Genes in Allopolyploid Brassica juncea显示文摘Brassica juncea is an allopolyploid originating from the interspecific hybridization between Brassica rapa and Brassica nigra, which is of multiple usage as a vegetable, oilseed and condiment worldwide. Both vernalization and non-vernalization under long-day photoperiod can promote floral transition in B. juncea suggesting merged flowering pathways of its ancestors and better environmental adaptability. We identified genomewide flowering regulatory genes in B. juncea, which include 84 and 79 genes from A and B sub-genomes, respectively. Ka/Ks analysis revealed a purification effect on both photoperiod and vernalization flowering regulation pathways during evolution. Expression profile of those genes during long-day and vernalization treatments suggested Bju ACO4, Bju AFT1, Bju BFT4, Bju ASOC1 and Bju ASOC4 may be the major functional copies of B. juncea flowering regulation. Further functional studies about Bju COs showed three days delayed flowering time in Bju ACO4 or Bju BCO3 silenced plants. Increased transcription of all BjuFLCs in Bju ACO4 or Bju BCO3 silenced plants suggested interactions between photoperiod and vernalization pathways governing flowering time. Our findings provided flowering regulating networks in allopolyploid B. juncea.Ning Zhao Chang Liu Yiqing Meng Zhongyuan Hu Mingfang Zhang Jinghua Yang 2019Horticultural Plant Journal2019,5,3:6
3Desulfurization metabolite of Rhodococcus erythropolis LSSE8-1 and its related desulfurizational gene fragments显示文摘Rhodococcus erythropolis LSSE8-1 is a newly isolated biodesulfurizaion strain from the soil of Chishui gas field, Guizhou Province, China. The analysis of its metabo-lism product shows that the strain is a kind of biocatalyst able to oxidize dibenzothiophene (DBT) to 2-hydroxydi- phenyl (HBP), and therefore the sulfur in DBT is selectively removed. By using DBTO2 (dibenzothiophene 5,5-dioxide) as substrate, both DBT and HBP are found in the culture, which shows that the reaction from DBT to DBTO2 is re-versible in the cell. While using 0.5 mmol/L DBT as control, 0.01—0.4 mmol/L DBTO2 shows poisonous effect to the cell, which will explain why there is no DBTO2 accumulation in the process of biodesulfurization. After treatment by lysozme, the plasmid DNA of the strain is isolated by alkaline method to be used as the template of PCR reaction. Three dsz gene fragments of 1.3, 1.0 and 1.2 kb respectively were amplified. Each fragment is ligate with PGEM-T vector, and cloned into E. coli. DH5. The clone DNA is sequenced and the result shows that dsz related genes are highly conservative. The identities of dszA and dszB with respect to IGTS8 are 100%, and the identity of dszC with that of IGTS8 is 99%.GOU Zhongxuan, LUO Mingfang, LI Xin, XING Jianmin & LIU Huizhou Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China Correspondence should be addressed to Liu Huizhou (e-mail: hzliu@ home.ipe.ac.cn) 2003Chinese Science Bulletin2003,48,24:5
4Simulation and assessment of sludge concentration and rheology in the process of waste activated sludge treatment显示文摘The process of using flat-sheet membrane for simultaneous sludge thickening and digestion (MSTD) was employed. The variations of sludge concentration and rheology were characterized and simulated. Based on mass balance analysis, mathematical models were developed and successfully used to predict and evaluate the variations of sludge concentration and the digestion effciency in the MSTD process. The apparent viscosity of sludge could be modeled as functions of mixed liquor suspended solids and shear rates. The sludge in the MSTD process showed both shear-thinning and viscoplastic behaviour, and under various shear rates different rheological models could be chosen to predict their flow behaviour. It was also found that sludge concentration and viscosity had significant correlations with membrane fouling in the MSTD process.XIA Mingfang WANG Zhiwei WU Zhichao WANG Xinhua ZHOU Zhen LU Jilai 2009Journal of Environmental Sciences2009,21,12:5
5Modeling of gas porosity and microstructure formation during dendritic and eutectic solidification of ternary Al-Si-Mg alloys显示文摘A two-dimensional(2-D)multi-component and multi-phase cellular automaton(CA)model coupled with the Calphad method and finite difference method(FDM)is proposed to simulate the gas pore formation and microstructures in solidification process of hypoeutectic Al-Si-Mg alloys.In this model,the pore growth,and dendritic and eutectic solidification are simulated using a CA technique.To achieve the equilibrium among multiple phases during ternary Al-based alloy solidification,the phase transition thermodynamics and kinetics are evaluated by adopting the Calphad method.The diffusion equations of hydrogen and two solutes are solved by FDM.The developed CA-FDM coupled model can be used for simulating the evolution of gas microporosity and microstructures,involving dendrites and irregular binary and ternary eutectics,of ternary hypoeutectic Al-Si-Mg alloys.It has the capability of reproducing the interactions between the hydrogen microporosity formation and the growth of dendrites and eutectics,the competitive growth among the growing gas pores of different sizes,together with the time-evolving concentration fields of hydrogen and solutes.The simulated morphology of gas pore and microstructure has a good agreement with the experimental observation.The influences of the initial hydrogen concentration and cooling rate on the microporosity formation are investigated.It is found that the main portion of porosity formation occurs in the eutectic solidification stage through analyzing the profiles of porosity percentage and solid fraction varying with solidification time.The varying features of simulated porosity percentage,the maximum and average pores radii indicate that increasing initial hydrogen concentration promotes the formation of higher final porosity percentage and larger pores,while the size of gas pores will significantly reduce with increasing cooling rate,leading to a lower final porosity percentage.Mengdan Hu Taotao Wang Hui Fang Mingfang Zhu 2021Journal of Materials Science & Technology2021,,17:4
6Performance of microbiological control by a point-of-use filter system for drinking water purification显示文摘Purification capacity of a faucet mounted type water filter for home use was evaluated,particularly with regard to microbiological performance under different running conditions.Biofilms were formed inside the filter,affecting the bacterial quality of the effuent water.Low flow rate,long stagnation period and high filter temperature were found favorable for bacterial growth inside.By commercial analytical profile index(API) kits,ten different bacterial species were identified in drinking water,four of which were probably contributed to the biofilm formation since they were also present in the biofilm.Fluorescence in situ hybridization(FISH) was used to confirm the API identification results,and direct viable count(DVC) method was employed to improve the sensitivity of FISH for the isolated Acinetobacter spp.and Pseudomonas putida as models.Relationship between the filter operating condition and the bacterial community alteration was partly revealed,which could provide the basic knowledge for the filter design and its practical use.SU Fengyi LUO Mingfang ZHANG Fei LI Peng LOU Kai XING Xinhui 2009Journal of Environmental Sciences2009,21,9:4
7Effect of burden and origin sites of premature ventricular contractions on left ventricular function by 7-day Holter monitor显示文摘Recent studies have shown that premature ventricular contractions(PVCs) could enlarge the heart,but its risk factors are incompletely understood as a single 24-hour recording cannot reflect the true PVC burden due to day-to-day variability.Our purpose was to investigate the effect of burden and origin sites on left ventricular(LV) function in patients with PVCs by 7-day Holter electrocardiography(ECG).From May 2012 to August2013,112 consecutive patients with PVCs were recruited from the authors' affiliated hospital.All patients received2-dimensional transthoracic echocardiography,12-lead routing ECG and 7-days Holter ECG.Serum N-terminal probrain natriuretic peptide(NT-proBNP) levels were measured.A total of 102 participants with PVCs were included in the final analysis.Origin of PVCs from the tricuspid annulus had the highest burden and NT-proBNP level.LV papillary muscle had a higher LV ejection fraction(EF) level and a lower LV end-systolic dimension(ESD) than other PVC foci(P<0.05).The high burden group had a higher LV end-diastolic dimension(EDD) and LVESD but lower LVEF than the other two groups(P<0.05).Female,older age,physical work,and history of PVCs had a significantly positive correlation with symptoms.Male,older age,physical work,and high burden were positive predictors of enlarged LVEDD,LVESD and higher serum NT-proBNP level,but lower LVEF.Seven-day dynamic ECG Holter monitor showed the true PVC burden on patients with PVCs.PVCs with a lower burden or origin from the LV papillary muscle and the fascicle were relatively benign,while PVCs with a higher burden or origin from the tricuspid annulus may lead to cardiac dysfunction.Wenhua Xu Mingfang Li Minglong Chen Bing Yang Daowu Wang Xiangqing Kong Hongwu Chen Weizhu Ju Kai Gu Kejiang Cao Hailei Liu Qi Jiang Jiaojiao Shi Yan Cui Hong Wang 2015The Journal of Biomedical Research2015,29,6:4
8Validation of Non-invasive Fibrosis Scores for Predicting Advanced Fibrosis in Metabolic-associated Fatty Liver Disease显示文摘Background and Aims:Metabolic-associated fatty liver disease(MAFLD)is a newly proposed terminology from 2020;yet,the applicability of conventional noninvasive fi-brosis models is still unknown for it.We aimed to evaluate the performance of conventional noninvasive fibrosis scores in MAFLD.Methods:The NHANES 2017-2018 datasets were used to compare the performances of different non-invasive fibrosis scores in MAFLD,including the aspartate aminotransferase(AST)to platelet ratio index(APRI),body mass index(BMI)-AST/alanine aminotransferase(ALT)ratio and diabetes score(BARD),fibrosis-4 index(FIB-4),and NAFLD fibrosis score(NFS).Moreover,Asian patients with biopsy-proven MAFLD were enrolled to further validate the findings.Results:A total of 2,622 participants in the Na-tional Health and Nutrition Examination Survey(NHANES)cohort and 293 patients with MAFLD in the Asian cohort were included.Patients in the Asian cohort had a lower BMI and higher liver enzymes(p<0.001).The area under the receiver operating characteristic curve(AUROC)of NFS was the largest in the NHANES cohort and Asian cohorts(0.679 and 0.699,respectively).The AUROC of NFS was followed by APRI,FIB-4,and BARD in the NHANES cohort(0.616,0.601,and 0.589,respectively).In the Asian cohort,the AUROC of APRI,FIB-4,and BARD for predicting advanced fibrosis were 0.625,0.683,and 0.615,respectively.The performance of FIB-4 was better in the Asian cohort than that in the NHANES cohort.Conclusions:NFS is better for predicting advanced fibrosis in MAFLD.FIB-4 can be an al-ternative choice for MAFLD with high liver enzymes when NFS is unavailable.Novel efficient noninvasive fibrosis scor-ing systems are highly required for patients with MAFLD.Xiaoning Chen George Boon-Bee Goh Jiaofeng Huang Yinlian Wu Mingfang Wang Rahul Kumar Su Lin Yueyong Zhu 2022Journal of Clinical and Translational Hepatology2022,10,4:4
9大气能量传播及不同纬度间大气相互作用的研究进展显示文摘早期的理论分析认为大气中临界纬度的存在使得热带-热带外的大气活动互不影响。然而,大量的观测事实表明中低纬度大气运动存在着明显的动力联系。为了帮助人们更好地理解大气中的遥相关现象,在大量文献的基础上,综述了几种波能量传播理论:(1)大圆理论指出了罗斯贝波在球形大气中的传播特征;(2)西风通道理论发现了中纬度瞬变扰动越赤道传播的'走廊';(3)能量堆积-波列发射理论揭示了热带扰动影响到更高纬度大气活动的可能过程;(4)赤道波侧向膨胀理论则利用转折纬度的概念更进一步解释了这种中低纬度大气相互作用的物理机制;(5)经向基本流理论则认为在一定的条件下定常波可以穿过热带东风带传播到另一半球。此外,文中还回顾了在波-流相互作用诊断方面的研究进展,尤其是关于罗斯贝波、惯性重力波和赤道开尔文波。大气能量的经向传播具有显著的年变化和年际变化,这与ENSO、西风急流、大洋中部槽等的变化密切相关。杨崧 邓开强 Ting Mingfang 胡春迪 2015气象学报2015,73,6:4
10Preparation and Microstructure of Green Ceramsite Made from Sewage Sludge显示文摘A pilot study was conducted to produce high performance green ceramsite by using sewage sludge, fly ash and silt. According to the theory of Riley, the proportions of raw materials were chosen to perform the sintering experiments. Thereby, the optimum proportion of sludge, fly ash and silt and sintering parameters were determined. The microstructure of the optimized mixture and the leaching of heavy metal elements were also analyzed. The lab testing results show that sintering parameters have significant impact on the performance of ceramsite. For solid waste ceramsite with high loss of ignition, inadequate pre-burning process lowers the strength and increases the water absorption. Low water absorption can be achieved by the enameled surface and closed pore structure. The high performance green ceramsite has the density grade of 700, water absorption of 6% and compressive strength of 6.6 MPa. The ceramsite is mainly composed of cristobalite and mullite. The leaching of heavy metal elements from the solid waste ceramsite are lower than the limits required by the national standard. This study shows that the utilization of solid waste ceramsite as the light weight aggregate is feasible and safe.柳俊哲 LIU Rui HE Zhimin BA Mingfang 李玉顺 2012Journal of Wuhan University of Technology(Materials Science)2012,27,1:4
11The effect of forest harvesting and climatic variability on runoff in a large watershed: The case study in the Upper Minjiang River of Yangtze River basin显示文摘Mingfang Zhang Xiaohua Wei Pengsen Sun Shirong Liu 2012Journal of Hydrology2012,,:4
12Epidemiological characteristics and temporal-spatial analysis of overseas imported dengue fever cases in outbreak provinces of China, 2005–2019显示文摘Background Overseas imported dengue fever is an important factor in local outbreaks of this disease in the mainland of China.To better prevent and control such local outbreaks,the epidemiological characteristics and temporal-spatial distribution of overseas imported dengue fever cases in provincial-level administrative divisions(PLADs)where dengue fever is outbreak in the mainland of China were explored.Methods Using the Chinese National Notifiable Infectious Disease Reporting Information System(CNNDS),we identified overseas imported dengue fever cases in dengue fever outbreak areas in the mainland of China from 2005 to 2019 to draw the epidemic curve and population characteristic distribution of overseas imported cases in each PLAD.Based on spatial autocorrelation analysis of ArcGIS 10.5 and temporal-spatial scanning analysis of SaTScan 9.5,we analyzed the temporal-spatial distribution of overseas imported dengue fever in dengue fever outbreak areas in the mainland of China.Results A total of 11,407 imported cases,mainly from Southeast Asia,were recorded from 2005 to 2019 in these 13 PLADs.Of which 62.1%were imported into Yunnan and Guangdong Provinces.Among the imported cases,there were more males than females,mainly from the 21–50 age group.The hot spots were concentrated in parts of Yunnan,Guangdong and Fujian Provinces.We found the cluster of infected areas were expanding northward.Conclusions Based on the analysis of overseas imported dengue cases in 13 PLADs of the mainland of China from 2005 to 2019,we obtained the epidemiological characteristics and spatial distribution of imported dengue cases.Border controls need to pay attention to key population sectors,such as 21–50 years old men and education of key populations on dengue prevention.There is a need to improve the awareness of the prevention and control of imported cases in border areas.At the same time,northern regions cannot relax their vigilance.Xinchang Lun Yiguan Wang Chunchun Zhao Haixia Wu Caiying Zhu Delong Ma Mingfang Xu Jun Wang Qiyong Liu Lei Xu Fengxia Meng 2022Infectious Diseases of Poverty2022,11,1:3
13Treatment of unstable angina with trimetazidine显示文摘在 endothelin 上象它的效果一样在不稳定的咽峡炎(UA ) 的治疗上评估临床的治疗学的效果 oftrimetazidine 的目的 -- 我病人的水平和复杂并发症。有 UA 的 120 个病人被使随机化进 trimetazidine 组( n =60 )和控制组( n =60 )的方法, trimetazidine 组每天加常规治疗,和临床的症状与 60 mg trimetazidine 受到治疗六个月,在心电图的变化,在血浆传播 endothelial 房间( CEC )和二个组的 endothelin-1 水平的数字的变化在治疗以后被观察四个星期;并且发生心脏的心律不齐评价,心脏的失败,住院也在治疗以后由于咽峡炎,心肌的梗塞和突然的死亡被观察六个月。结果 1 ) 在在为四个星期的治疗以后的 trimetazidine 组和控制组的综合临床的治疗学的效果的全部的有效的率是 86.7% 和 68.3% ,分别地(P < 0.05 ) ,并且优越率是 36.7% 和 15%(P < 0.01 ) 分别地;为在心电图的治疗学的效果的全部的有效的率是 66.7% 和 46.7% ,分别地(P < 0.05 ) ,并且优越率是 30.0% 和 11.7% ,分别地(P < 0.01 ) 。2 ) 血浆 CEC 的数字和在为四个星期的处理以后的二个组的 endothelin-1 水平显著地减少了(P < 0.05 ) ,但是在 trimetazidine 组的减少是甚至重要的(P < 0.01 ) 。 3 )为在在为六个月的处理以后的 trimetazidine 组和控制组的心脏的心律不齐的发生率是10%和20%( P < 0.05 ),分别地并且为心脏的失败的发生率是8.3%和18.3%,分别地( P < 0.05 ),并且为住院的发生率由于咽峡炎是10%和15%,并且为心肌的梗塞的事件率分别地是3.3%和13.3%( P < 0.05 )。结论 Trimetazidine 能显著地改进 UA 和心肌的局部缺血的症状,把损坏归结为血容器内皮细胞层和复杂并发症,并且改进预后。Xiexing Chen Mingfang Ye 2009Journal of Geriatric Cardiology2009,6,2:3
14MRI can reveal metabolic changes in lily bulbs in vivo during dormancy release显示文摘The factors influencing dormancy release in lily bulbs strongly affect commercialization success, but the mechanism of dormancy release is still unclear. Magnetic resonance imaging (MRI) can detect changes in morphology and water status in a living plant bulb and aid in investigating release factors. To evaluate whether MRI could be used to detect intra-bulb metabolic changes during the dormant period in Oriental Lilies (Lilium 'Sorbonne'), a series of MRI and sugar concentration measurements were performed weekly on bulbs stored for 11 weeks at 4°C. The image quality of intra-bulb structure obtained using T 1-weighted imaging was superior to that obtained using T 2 -weighted imaging and had a higher signal-to-noise ratio (0.97±0.01). Magnetization transfer ratio values for the bud and basal plate declined during the first eight weeks of cold storage (P>0.05), and were well correlated with concentration of soluble sugar in the bud (R 2 =0.95) and basal plate (R 2 =0.93). Thus, MRI can serve as a valuable tool for observation and analysis of dynamic morphological and metabolic changes in vivo during dormancy release. This information is potentially useful as a guide in the improvement of horticultural product quality.HAN HaoJun YI MingFang 2012Science China(Life Sciences)2012,55,11:3
15Association between essential hypertension and polymorphisms of beta 1 adrenergic receptor gene G1165C (Gly389Arg) in Chinese Mongolian population显示文摘BACKGROUND: The prevalences of hypertension, cerebrovascular diseases, etc. are higher in Mongolian population because of the influence of various factors including genetics, geography, diet, etc. Therefore, it is helpful to develop researches on the genetics of various diseases including hypertension in Mongolian population. OBJECTIVE: To analyze the association between the polymorphism of beta1 adrenergic receptor (β1-AR) gene G1165C (Arg389Gly), an important candidate gene for various diseases of cardiovascular system, and essential hypertension in Mongolian population. DESIGN: A cross-sectional study. SETTINGS: Department of Neurology, the First Affiliated Hospital of Inner Mongolia Medical College; Wulate Houqi Red Cross Society. PARTICIPANTS: The survey was carried out from February 2003 to March 2005. Totally 239 Mongolian residents, whose blood relations of 3 generations were all Mongolians, were selected from Wulate Houqi, Inner Mongolia, and they were all informed with the survey and detected items. Based on the diagnostic standard of hypertension set by WHO in 1999, the subjects were divided into two groups according to the level blood pressure: ① Normal blood pressure group (n=117): systolic blood pressure (SBP) < 140 mm Hg (1 mm Hg =0.133 kPa), diastolic blood pressure (DBP) < 90 mm Hg, and those having histories of cerebrovascular disease, heart disease, diseases of liver, kidney and tiroides, and diabetes mellitus were excluded. ② Essential hypertension group (n=122): including 51 patients with simple high SBP. All the enrolled subjects had no blood relationship with each other, and had no history of miscegenation. METHODS: The body height, body mass, waist circumference and blood lipids were measured routinely, and their habits of smoking and drinking were also investigated. Peripheral venous blood (5 mL) was drawn, the genome DNA was extracted, and the polymorphisms of the β1-AR G1165C (Gly389Arg) genotype were detected with the Sequenom system. Polymerase chain reaction (PCR) experiment and SNP detection were performed in Huada Gene Laboratory of Bejing, then the univariate analysis of variance was applied in the sample comparison among groups, and the chi-square test was used to compare the genotypes and allele frequencies. The odd ratio (OR) and 95% confidence interval (CI) were calculated. MAIN OUTCOME MEASURES: The distributions of β1-AR G1165C (Gly389Arg) genotypes and alleles were observed. RESULTS: All the 239 subjects were involved in the analysis of results, and no one missed. ①Comparison of β1-AR G1165C (Gly389Arg) genotypes and allele distributions: In Mongolian population, the frequencies of CC and GG+GC genotypes at β1-AR G1165C (Gly389Arg) site in the essential hypertension group (72%, 28%) were not significantly different from those in the normal blood pressure group (67%, 33%) (χ2=0.841, P=0.359; OR: 0.773, 95%CI: 0.445-1.342); The frequencies of C and G alleles also had no significant differences between the essential hypertension group (85%, 15%) and the normal blood pressure group (82%, 18%) (χ2=1.136, P=0.287; OR: 0.769, 95%CI: 0.747-1.248). ②The frequencies of CC and GG+GC genotypes at β1-AR G1165C (Gly389Arg) site had no significant differences between the patients with simple high SBP (71%, 29%) and the normal blood pressure group (χ2=0.250, P=0.617; OR: 0.833, 95%CI: 0.408-1.703); The frequencies of C and G alleles were not significantly different between the patients with simple high SBP (86%, 14%) and the normal blood pressure group (χ2=0.670, P=0.413; OR: 0.766, 95%CI: 0.404-1.453). CONCLUSION: In Mongolian population, the distributions of the genotypes and alleles of β1-AR G1165C (Gly389Arg) have no obvious differences between the subjects with normal blood pressure and the patients with essential hypertension (including simple SBP increase), which suggests that G1165C (Glu389Asp) site of β1-AR gene may be not a genetic mark of essential hypertension and simple high SBP in Mongolian population.Rile Hu Rile Hu Shigang Zhao Guangming Niu Chunyu Zhang Zhiguang Wang Mingfang Jiang 2006Neural Regeneration Research2006,1,3:2
16Mitochondrial retrograde regulation tuning fork in nuclear genes expressions of higher plants显示文摘In plant cells, there are three organelles: the nucleus, chloroplast, and mitochondria that store genetic information. The nucleus possesses the majority of genetic information and controls most aspects of organelles gene expression, growth, and development. In return, organelles also send signals back to regulate nuclear gene expression, a process defined as retrograde regulation. The best studies of organelles to nucleus retrograde regulation exist in plant chloroplast-to-nuclear regulation and yeast mitochondria-to-nuclear regulation. In this review, we summarize the recent understanding of mitochondrial retrograde regulation in higher plant, which involves multiple potential signaling pathway in relation to cytoplasmic male-sterility, biotic stress, and abiotic stress. With respect to mitochondrial retrograde regulation signal pathways involved in cytoplasmic male-sterility, we consider that nuclear transcriptional factor genes are the targeted genes regulated by mitochondria to determine the abnormal reproductive development, and the MAPK signaling pathway may be involved in this regulation in Brassica juncea. When plants suffer biotic and abiotic stress, plant cells will initiate cell death or other events directed toward recovering from stress. During this process, we propose that mitochondria may determine how plant cell responds to a given stress through retrograde regulation. Meanwhile, several transducer molecules have also been discussed here. In particular, the Paepe research group reported that leaf mitochondrial modulated whole cell redox homeostasis, set antioxidant capacity, and determined stress resistance through altered signaling and diurnal regulation, which is an indication of plant mitochondria with more active function than ever.Jinghua Yang Mingfang Zhang Jingquan Yu 2008Journal of Genetics and Genomics2008,35,2:2
17Gaussian process regression-based quaternion unscented Kalman robust filter for integrated SINS/GNSS显示文摘High-precision filtering estimation is one of the key techniques for strapdown inertial navigation system/global navigation satellite system(SINS/GNSS)integrated navigation system,and its estimation plays an important role in the performance evaluation of the navigation system.Traditional filter estimation methods usually assume that the measurement noise conforms to the Gaussian distribution,without considering the influence of the pollution introduced by the GNSS signal,which is susceptible to external interference.To address this problem,a high-precision filter estimation method using Gaussian process regression(GPR)is proposed to enhance the prediction and estimation capability of the unscented quaternion estimator(USQUE)to improve the navigation accuracy.Based on the advantage of the GPR machine learning function,the estimation performance of the sliding window for model training is measured.This method estimates the output of the observation information source through the measurement window and realizes the robust measurement update of the filter.The combination of GPR and the USQUE algorithm establishes a robust mechanism framework,which enhances the robustness and stability of traditional methods.The results of the trajectory simulation experiment and SINS/GNSS car-mounted tests indicate that the strategy has strong robustness and high estimation accuracy,which demonstrates the effectiveness of the proposed method.LYU Xu HU Baiqing DAI Yongbin SUN Mingfang LIU Yi GAO Duanyang 2022Journal of Systems Engineering and Electronics2022,33,5:2
18Simple expression for internal surface temperature distribution in corners of external walls 显示文摘TANG Mingfang CHEN Qigao 1997Building and Environment1997,32,4:2
19Study of the Toxicity of 1-Bromo-3-Chloro-5,5-Dimethylhydantoin to Zebrafish显示文摘Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin (BCDMH) is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developmental toxicity of BCDMH on zebrafish embryos and the dose-effect relationship was determined.The effect of BCDMH exposure on histopathology and tissue antioxidant activity of adult zebrafish were observed over time.Results Exposure to 4 mg/L BCDMH post-fertilization was sufficient to induce a number of developmental malformations,such as edema,axial malformations,and reductions in heart rate and hatching rate.The no observable effects concentration of BCDMH on zebrafish embryo was 0.5 mg/L.After 96 h exposure,the 50% lethal concentration (95% confidence interval (CI)) of BCDMH on zebrafish embryo was 8.10 mg/L (6.15-11.16 mg/L).The 50% inhibitory concentration (95% CI) of BCDMH on hatching rate was 7.37 mg/L (6.33-8.35 mg/L).Histopathology showed two types of responses induced by BCDMH,defensive and compensatory.The extreme responses were marked hyperplasia of the gill epithelium with lamellar fusion and epidermal peeling.The histopathologic changes in the gills after 10 days exposure were accompanied by significantly higher catalase activity and lipid peroxidation.Conclusion These results have important implications for studies on the toxicity and use of BCDMH and its analogs.LI WanFang WEI JinFeng JIN HongTao HUANG MingFang ZHANG JingXuan LI ChengHe CHEN ChaoJie LIU Chang WANG AiPing 2011Biomedical and Environmental Sciences2011,24,4:2
20Effects of Carbonation on Micro Structures of Hardened Cement Paste显示文摘In order to investigate the effects of carbonation on the microstructure of cement concrete,the carbonation depth and microstructure of cement paste with 0.3,0.4 and 0.5 water/cement ratio after 7,14,21 and 28 d accelerated carbonation were studied respectively.The results showed that with the increase of waterto-cement ratio and carbonation age,the carbonation depth was deepened with faster early carbonation speed and slower later carbonation rate.Carbonation densified the structure of hardened cement stone with refinement of pore structure and reduced porosity.Then,during the carbonation process from the surface to the inside of carbonation area,it was prone to form micro-cracks extending to the interior specimen,resulting in cement paste carbonation depth uneven.It is further illustrated that the color reaction method using phenolphthalein solution combined with X-CT and X-ray diffraction analysis is much more reasonable to evaluate the cement concrete carbonation degree.Moreover,during carbonation process sulfur element in cement paste migrated to the area un-carbonated and the concentrated shape of sulfur element is consistent with the coloring region in carbonation interface.Finally it was identified that carbonation not only reduced the p H value in cement concrete but also made prone to crack in carbonation zone,which increased the probability of reinforcement corrosion.柳俊哲 yao senyuan ba mingfang he zhimin 李玉顺 2016Journal of Wuhan University of Technology(Materials Science)2016,31,1:2
返回顶部 每页显示:
共9页 首页 上一页 第1页 下一页 末页 /9 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费