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45篇 您的检索式:作者名="Li Guifeng"
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1Development of a modified Mooney-Rivlin constitutive model for rubber to investigate the effects of aging and marine corrosion on seismic isolated bearings显示文摘In this study,aging and marine corrosion tests of a large number of rubber material and rubber bearings have been carried out.The constitutive Mooney-Rivlin model parameters for a rubber isolated bearing have been determined.By applying the least-square method to the experimental data,the relationships between the aging time and the marine corrosion time with the constants in the constitutive model for a rubber bearing have been derived.Next,the Mooney-Rivlin model has been modified accordingly.Further,using the modified Mooney-Rivlin model and the Abaqus software,the performance of the rubber isolated bearings has been simulated.The simulation results have been compared to the experimental results so as to verify the accuracy of the modified model.The comparison shows that the maximum errors for the vertical and horizontal stiffnesses are 16.8%and 0.49%,respectively.Since these errors are considered acceptable,the accuracy of the modified constitutive model can be considered verified.The results of this study can provide theoretical support for the performance study on rubber isolated bearings under the complex ocean environment and the life-cycle performance evaluation of bridges and other offshore structures.Zhao Guifeng Ma Yuhong Li Yanmin Luo Jiarun Du Chang 2017Earthquake Engineering and Engineering Vibration2017,16,4:8
2Development and utilization of a new chemically-induced soybean library with a high mutation density显示文摘Mutagenized populations have provided important materials for introducing variation and identifying gene function in plants. In this study, an ethyl methanesulfonate(EMS)-induced soybean(Glycine max) population,consisting of 21,600 independent M_2 lines, was developed.Over 1,000 M_(4(5))families, with diverse abnormal phenotypes for seed composition, seed shape, plant morphology and maturity that are stably expressed across different environments and generations were identified. Phenotypic analysis of the population led to the identification of a yellow pigmentation mutant, gyl, that displayed significantly decreased chlorophyll(Chl) content and abnormal chloroplast development. Sequence analysis showed that gyl is allelic to Minn Gold, where a different single nucleotide polymorphism variation in the Mg-chelatase subunit gene(ChlI1a) results in golden yellow leaves. A cleaved amplified polymorphic sequence marker was developed and may be applied to marker-assisted selection for the golden yellow phenotype in soybean breeding. We show that the newly developed soybean EMS mutant population has potential for functional genomics research and genetic improvement in soybean.Zhongfeng Li Lingxue Jiang Yansong Ma Zhongyan Wei Huilong Hong Zhangxiong Liu Jinhui Lei Ying Liu Rongxia Guan Yong Guo Longguo Jin Lijuan Zhang Yinghui Li Yulong Ren Wei He Ming Liu Nang Myint Phyu Sin Htwe Lin Liu Bingfu Guo Jian Song Bing Tan Guifeng Liu Maiquan Li Xianli Zhang Bo Liu Xuehui Shi Sining Han Sunan Hua Fulai Zhou Lili Yu Yanfei Li Shuang Wang Jun Wang Ruzhen Chang Lijuan Qiu 2017Journal of Integrative Plant Biology2017,59,1:6
3Genetic variation and selection of introduced provenances of Siberian Pine(Pinus sibirica) in frigid regions of the Greater Xing'an Range,Northeast China显示文摘Siberian Pine(Pinus sibirica) is an ecologically and economically important species in pristine forests throughout northern Russia. Four provenances of P. sibirica were introduced from Mongolia and Russia to the Greater Xing'an Range(the Daxing'anling), northeast China in 1993. The aim of this research was to study genetic variation and selection of the introduced four Pinus sibirica provenances. Heights(H), basal diameters(BD), survival rates(SR) and crown lengths(CL) of different families were measured as primary outcomes in different growth years. Results of data analyses demonstrated high coefficients of phenotypic variation(PCV) and heritability(H2) for H, BD and CL at 18 years after introduction. PCV and H2 increased with age. Correlations of growth traits between any two growth years were all significantly positive, but the correlation coefficient was smaller when the growth year interval was larger. Correlations between H and the original environment factors decreased gradually, indicating that with long-term subsistence in the new environment, the influence of the source environment declined. Colligation of multiple traits to estimate provenances showed that Novosibirsk, Tomsk, and Altai Mountains had higher survival rates and biomass, and proved more suitable for introduction and plantation in the Greater Xing'an Range in China.Xiyang Zhao Cheng Wang Shuchun Li Wei Hou Shiqing Zhang Guijie Han Deng Pan Ping Wang Yufei Cheng Guifeng Liu 2014Journal of Forestry Research2014,25,3:6
4Long-term anodal block stimulation at sacral anterior roots promoted recovery of neurogenic bladder function in a rabbit model of complete spinal cord injury显示文摘A complete spinal cord injury model was established in experimental rabbits using the spinal cord clip compression method.Urodynamic examination was performed 2 weeks later to determine neurogenic bladder status.The rabbits were treated with anodal block stimulation at sacral anterior roots for 4 weeks.Electrical stimulation of sacral anterior roots improved urodynamic parameters of neurogenic bladder in rabbit models of complete spinal cord injury,effectively promoted urinary function,and relieved urinary retention.Immunohistochemistry results showed that a balance was achieved among expression of muscarinic receptor subunits M2,M3,ATP-gated ion channel P2X3 receptors,and β2-adrenergic receptor,and nerve growth factor expression decreased.These results suggested that long-term sacral anterior root stimulation of anodal block could be used to treat neurogenic bladder in a rabbit model of complete spinal cord injury.Xiaoran Wang Qi Gao Xiaoyu Yang Weihua Wang Xinquan Gu Guifeng Liu Peng Yan Ge Gao Xin Yu Yongjie Wang Jihu Lian Chaoling Shi Yao Wang Li Fan 2012Neural Regeneration Research2012,7,5:6
5Post-marketing safety surveillance and reevaluation of Motherwort injection:A clinical study of 10094 cases显示文摘OBJECTIVE:To investigate the safety profiles of Motherwort injection(MI).METHODS:A multi-center,prospective and drugderived hospital intensive monitoring method was conducted to assess the safety of MI in real world applications.This study was based on a very large population after the injection was approved and marketed in China.All patients using the injection in participating hospitals were monitored to determine the incidence,pattern,severity and outcome of associated adverse events.RESULTS:The post-marketing surveillance was performed in 10 094 female patients from April to December,2015.The incidence of adverse drug reactions(ADRs) was 0.79‰(8/10 094).Among the 8 patients,the reported adverse events mainly included systemic abnormalities,such as fever,chills and eyelid edema;skin and appendages disorders,such as pruritus and rash;gastrointestinal disorders,such as nausea,abdominal distension and pain;heart rate and rhythm disorders,such as palpitation and increased heart rate.All of these ADRs were mild in severity.CONCLUSION:In this study the ADRs incidence rate of MI is very low,which supports that it is generally safe for use in obstetric and gynecological diseases.However,the total number of 8 ADRs recorded over a relatively short time span seems limited,and the low number of reports could not represent an absolute guarantee of safety.Cao Shan Zhang Wenhao Zhao Ziwei Heng Mingli Bu Huaien Wang Hongwu Liu Xinghui Wang Zhong Cai Yan Ma Yuyan Cui Shihong Deng Jihong Ding Guifeng Ding Yajuan Dong Linhong Duan Zhentao Fan Ling Fan Yang Fu Fen He Jing Ji Shuying Jin Lin Li Hong Li Hongying Liao Tao Lu Wei Luo Xiucui Lü Zhihui Ma Fengchun Ma Dafeng Shi Tianyun Sun Juying Sun Xiaotong Teng Hong Wang Jinhua Wang Ruihua Wang Ying Wang Zhengling Xi Jie Xu Minjuan Xu Zhihong Yan Qian Yang Cuirong Yang Yimei Yin Jie Yu Jinhua Yuan Wenjun Zhang Guanli Zhang Meihua Zhao Renfeng Zhong Yonghong Zhou Jian 2018Journal of Traditional Chinese Medicine2018,38,4:4
6BpMADS12 gene role in lignin biosynthesis of Betula platyphylla Suk by transcriptome analysis显示文摘MADS-box transcription factors show highly diverse regulatory functions in a wide variety of organisms.In this study,we characterized a MADS-box gene(BpMADS12) from the white birch(Betula platyphylla Suk).This gene is a member of the suppressor of overexpression of CO 1/tomato MADS 3 class of MADS-box genes.We generated lines overexpressing BpMADS12 and found that these had higher levels of lignin compared to that observed in nontransgenic lines.Transcriptome analysis revealed numerous changes in gene expression patterns.In total,8794 differentially expressed genes were identified,including 5006 upregulated unigenes and 3788 downregulated unigenes in Bp MADS-overexpression lines.Differentially expressed genes involved in the pathways for lignin and brassinosteroid biosynthesis were significantly enriched and may have contributed to phenotypic changes.The results from a quantitative RT-PCR analysis were consistent those obtained with the transcriptome analysis.Our transcriptome analysis,in combination with measurement of lignin level,indicated that Bp MADS12 promotes lignin synthesis through regulation of key enzymes in response to brassinosteroid signaling.These results suggest that this MADS-box protein is crucial to all subsequent structural events and provide a good foundation for studies aiming to elucidate the developmental mechanisms underlying formation of wood.Huiyu Li Yang Yang Zijia Wang Xiaohong Guo Feifei Liu Jing Jiang Guifeng Liu 2016Journal of Forestry Research2016,27,5:4
7Activated and deactivated functional brain areas in the Deqi state: A functional MRI study显示文摘We compared the activities of functional regions of the brain in the Deqi versus non-Deqi state, as reported by physicians and subjects during acupuncture. Twelve healthy volunteers received sham and true needling at the Waiguan (TE5) acupoint. Real-time cerebral functional MRI showed that compared with non-sensation after sham needling, true needling activated Brodmann areas 3, 6, 8, 9, 10, 11, 13, 20, 21, 37, 39, 40, 43, and 47, the head of the caudate nucleus, the parahippocampal gyrus, thalamus and red nucleus. True needling also deactivated Brodmann areas 1, 2, 3, 4, 5, 6, 7, 9, 10, 18, 24, 31, 40 and 46.Yong Huang Tongjun Zeng Guifeng Zhang Ganlong Li Na Lu Xinsheng Lai Yangjia Lu Jiarong Chen 2012Neural Regeneration Research2012,7,30:4
8Differential protein expression in spinal cord tissue of a rabbit model of spinal cordischemia/reperfusion injury显示文摘New Zealand rabbits were randomly divided into an ischemia group(occlusion of the abdominal aorta for 60 minutes),an ischemia-reperfusion group(occlusion of the abdominal aorta for 60 minutes followed by 48 hours of reperfusion) and a sham-surgery group.Two-dimensional gel electrophoresis detected 49 differentially expressed proteins in spinal cord tissue from the ischemia and ischemia/reperfusion groups and 23 of them were identified by mass spectrometry.In the ischemia group,the expression of eight proteins was up regulated,and that of the remaining four proteins was down regulated.In the ischemia/reperfusion group,the expression of four proteins was up regulated,and that of two proteins was down regulated.In the sham-surgery group,only one protein was detected.In the ischemia and ischemia/reperfusion groups,four proteins overlapped between groups with the same differential expression,including three that were up regulated and one down regulated.These proteins were related to energy metabolism,cell defense,inflammatory mechanism and cell signaling.Qi Gao Yonghui Liang Xiaoyu Yang Guifeng Liu Xiaoxue Li Benqing Zhu Jian Liu Maoguang Yang Weiwei Xia Jian Dong Jianhang Jiao 2012Neural Regeneration Research2012,7,20:4
9Dual gradient ion-exchangechromatography improved refolding yield of lysozyme显示文摘Li Ming Zhang Guifeng Su Zhiguo 2002Journalof Chromatography A2002,959,12:1
10Soil bacterial communities respond differently to graphene oxide and reduced graphene oxide after 90 days of exposure显示文摘Graphene-based nanomaterials(GBNs)are likely to be entering the soil environment in increasing amounts via consumer products.However,the disturbance of bacterial communities and their associated ecological functions by GBNs remains elusive.We performed a soil incubation experiment with the addition of graphene oxide(GO)and reduced graphene oxide(RGO).The Illumina sequencing technique was used to investigate changes in bacterial communities,and the functional groups of the communities were analyzed using the functional annotation of prokaryotic taxa database.After 90 days of exposure,RGO induced a lower bacterial richness than GO.However,GO induced larger changes in community composition and functions than RGO.After exposure to GBNs,some of the functional groups associated with organic matter degradation and biogeochemical cycling of nitrogen and sulfur decreased.However,the functional group associated with aromatic compound degradation increased,possibly because GBNs contain rich aromatic hydrocarbon structures,which are tolerated by this functional group.Junjie Du Qixing Zhou Jianhu Wu Guifeng Li Guoqin Li Yongning Wu 2020Soil Ecology Letters2020,2,3:1
11Generation of a Golden Leaf Triploid Poplar by Repressing the Expression of GLK Genes显示文摘Poplar trees are excellent varieties widely used for gardening and greening.However,their single color and floating fluffy seeds are major disadvantages.Plant species or varieties with variegated leaves are desperately needed to meet various demands for gardens,urban greening and landscape decoration,as they produce rich foliage colors that are aesthetically pleasing and functional.In this study,we generated a golden leaf triploid poplar(P.alba×P.berlinensis)by repressing the expression of GLK(Golden2-like)genes in leaves.The triploid golden leaf poplar had reduced chlorophyll content but almost no change in the growth rate.It has great potential in landscaping once it passes safety assessments.Yidi Li Chenrui Gu Huixin Gang Yu Zheng Guifeng Liu Jing Jiang 2021Forestry Research2021,1,1:1
12An Edge Embedded Marker-based Watershed Algorithm for High Spatial Resolution Remote Sensing Image Segmenta-tion显示文摘Li Deren Zhang Guifeng Wu Zhaocong 2010IEEE Transactions on Image Processing2010,19,10:1
13Genetic variability of Blastocystis hominis isolates in China显示文摘Yiming Yan Shuilian Su Riyong Lai Hua Liao Jinhua Ye Xiaobo Li Xiaoting Luo Guifeng Chen 2006Parasitology Research2006,,5:1
14Effects of levamisole on the immune response and disease resistance of Clarias fuscus显示文摘Li Guifeng Guo Yungui Zhao Dianhui 2006Aquaculture2006,,253:1
15Mass spectrometric analysis of enzymatic digestion of denatured collage for identification of collagen type显示文摘Zhang Guifeng Sun Aimei Li Weijun 2006J Chromat A2006,1114,2:1
16Oral mucilage in the painless gastroscope lubrication clinical observation of a gastric tube 显示文摘Lai Guifeng Li Xinping Li Jianfang 2007Journal of Guangxi Medical University2007,23,2:1
17Diagnostic significance of hepatitis B viral antigens in patients with glomerulonephritis-associated hepatitis B virus infection显示文摘Chenggang Shi Jiyi Huang Xun Liu Xiaolin Zeng Cailian Cheng Qiongli Yin Mei Li Guifeng Cheng 2012Diagnostic Microbiology & Infectious Disease2012,,2:1
18Tungsten-doped In203 transparent conductive films with high transmittance in near-infrared region显示文摘YANG Ming Feng Jiahan LI Guifeng 2008Journal of Crystal Growth2008,310,15:1
19Identification and phylogenetic analysis of Vibrio vulnificus isolated from diseased Trachinotus ovatus in cage mariculture 显示文摘LI Guifeng ZHAO Dianhui HUANG Lu 2006Aquaculture2006,261,:1
20Mass spectrometric detection of marker peptides in tryptic digests of gelatin: A new method to differentiate between bovine and porcine gelatin显示文摘Guifeng Zhang Tao Liu Qian Wang Li Chen Jiandu Lei Jian Luo Guanghui Ma Zhiguo Su 2009Food Hydrocolloids2009,,7:1
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