检索结果-南通市图书馆

Anisotropy of mechanical properties of 2297-T87 Al–Li alloy thick plates

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2023年第11期30卷 2212-2223页

作者： Yuji Bai zhixiu wang Bo Jiang Mengqi Li Cong Zhu Xiaotong Gu Hai Li School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Material Surface Science and Technology Changzhou UniversityChangzhou 213164China

The tensile properties of 2297-T87 Al–Li alloy thick plates at different thickness position and in different direction were analyzed via tensile testing,optical microscopy(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectrometry(EDS),and transmission electron microscopy(TEM).Results indicated that the ultimate tensile strength(UTS)and yield strength(YS)of the alloy decreased firstly and then increased from the 1/8T position to the 1/2T position,whereas elongation to failure(Ef)decreased gradually such that its value along the rolling direction(RD)was higher than those along the transverse direction(TD)at the same thickness *** the 1/8T position to the 3/8T position of the alloy,the UTS and YS along the TD were higher than those along the *** the 1/2T position of the alloy,the UTS,YS,and Ef along the RD were the highest,whereas those along the normal direction(ND)were the *** observations further revealed that the anisotropy of tensile properties was related to grain morphology,crystal texture,second-phase particles,and Li atom segregation.

关键词： 2297 alloy thick plate tensile properties anisotropy grain morphology second-phase particles

Transcriptome analysis reveals the genetic basis of crest cushion formation in duck

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第12期23卷 4172-4185页

作者： Lan Huang Qixin Guo Yong Jiang zhixiu wang Guohong Chen Guobin Chang Hao Bai Joint International Research Laboratory of Agriculture and Agri-Product Safety Ministry of Education/Institutes of Agricultural Science and Technology DevelopmentYangzhou UniversityYangzhou 225009China Key Laboratory of Animal Genetics and Breeding and Molecular Design of Jiangsu Province College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009China

The Chinese crested duck is a unique duck breed having a bulbous feather shape on its duck ***,the mechanisms involved in its formation and development are *** the present study,RNA sequencing analysis was performed on the crested tissues of 6 Chinese crested ducks and the scalp tissues of 6 cherry valley ducks(CVs)from 2 developmental *** study identified 261 differentially expressed genes(DEGs),122 upregulated and 139 downregulated,in the E28 stage and 361 DEGs,154 upregulated and 207 downregulated in the D42 stage between CC and CV *** subsequent results of weighted gene co-expression network analysis(WGCNA)revealed that the turquoise and cyan modules were associated with the crest trait in the D42 stage,meanwhile,the green,brown,and pink modules were associated with the crest trait in the E28 *** analysis of the DEGs and WGCNA showed that 145 and 45 genes are associated between the D42 and E28 stages,*** expression of WNT16,BMP2,SLC35F2,SLC6A15,APOBEC2,ABHD6,TNNC2,MYL1,and TNNI2 were verified by real-time quantitative *** study provides an approach to reveal the molecular mechanisms underlying the crested trait development.

关键词： crested duck RNA-sequencing weighted gene co-expression network analysis differentially expressed genes

Gene expression of vascular endothelial growth factor A and hypoxic adaptation in Tibetan pig

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2016年第4期7卷 474-481页

作者： Bo Zhang Yangzong Qiangba Peng Shang Yunfeng Lu Yuzeng Yang zhixiu wang Hao Zhang National Engineering Laboratory for Animal Breeding China Agricultural University College of Agriculture and Animal Husbandry Tibet University School of life science & technology Nanyang normal University Hebei Provincial Husbandry and Veterinary Research Institute

Background： Vascular endothelial growth factor A （VEGFA） can induce endothelial cell proliferation, promote cell migration, and inhibit apoptosis. These processes play key roles in physiological blood vessel formation and pathological angiogenesis. Methods： In this study, we examined VEGFA gene expression in the heart, liver, and kidney of Tibetan pigs （-I-P）, Yorkshire pigs that migrated to high altitudes （YH）, and Yorkshire pigs that lived at low altitudes （YL）. We used PCR and Sanger sequencing to screen for single nucleotide polymorphisms （SNPs） in 5＇-flanking DNA and exons of the VEGFA gene. Quantitative real-time PCR and western blots were used to measure expression levels and PCR products were sequenced. Results： Results showed that the VEGFA mRNA and protein expression in heart, liver and kidney of TP was higher than that in YH and YL. In addition, the mRNA sequence of the pig VEGFA gene was conserved among pig breeds, and only five SNPs were found in the 5＇-flanking region of the VEGFA gene, the allele frequency distributions of the 5 SNPs were not significantly different between the TP, Yorkshire （YL）, and Diannan small-ear （DN） pig populations. Conclusion： In conclusion, the Tibetan pig showed high tissues, which suggests that the VEGFA gene may play a levels of VEGFA gene expression in several hypoxic major functional role in hypoxic adaptation.

关键词： Gene expression Hypoxic adaptation Tibetan pig VEGFA gene

Studies towards Bioinspired Synthesis of Hetidine-Type C20-Diterpenoid Alkaloids

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2017年第6期35卷 991-1000页

作者： Min Zhu Xiaohuan Li Xue Song zhixiu wang Xiaoyu Liu Hao Song Dan Zhang Fengpengwang Yong Qin Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education West China School of Pharmacy and State Key Laboratory of Biotherapy Sichuan University Chengdu Sichuan 610041 China

Details of a biogenetically inspired strategy that led to the synthesis of the hetidine-type C20-diterpenoid alka- loid skeleton are reported in this paper. Key steps of our synthesis include a C-H oxidation to convert the atis- ine-type core to the ajaconine skeleton, as well as an aza-Prins cyclization that establishes the hetidine alkaloid skeleton. An unexpected heptacyclic framework bearing a unique tricyclo[3.***.1.02.7]nonane moiety has been ob- tained during our studies, which may represent a new type of C20-diterpenoid alkaloids yet to be discovered.

关键词： alkaloids bioinspired synthesis C--H oxidation cyc|ization terpenoids

Proteomic and phosphoproteomic analysis reveal threonine deficiency increases hepatic lipid deposition in Pekin ducks via reducing STAT phosphorylation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal Nutrition 2023年第2期13卷 249-260页

作者： Yong Jiang Zhong Zhuang Wenqia Jia Zhiguo Wen Ming Xie Hao Bai Yulin Bi zhixiu wang Guobin Chang Shuisheng Hou Guohong Chen College of Animal Science and Technology Yangzhou UniversityYangzhou 225009China State Key Laboratory of Animal Nutrition Key Laboratory of Animal(Poultry)Genetics Breeding and ReproductionMinistry of Agriculture and Rural AffairsInstitute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China Joint International Research Laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaInstitutes of Agricultural Science and Technology DevelopmentYangzhou UniversityYangzhou 225009China Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs Institute of Feed ResearchChinese Academy of Agricultural SciencesBeijing 100081China

Dietary threonine(Thr)deficiency enhances triglyceride(TG)deposition in the liver of Pekin ducks,which injures hepatic function and impairs growth ***,the underlying molecular mechanisms remain *** the present study,we investigated the effects of dietary Thr deficiency on the expressions of proteins and phosphoproteins in liver of Pekin ducks,to identify the underlying molecular changes.A total of 300 one-day-old ducklings were divided into 3 groups with 10 replicates of 10 *** ducks were fed corn-wheat-peanut meal diets containing 0.46%,0.71%,and 0.96%Thr,respectively,from 1 to 21 days of *** performance,serum parameters,hepatic TG content,and expression of genes involved in lipid metabolism of Pekin ducks were determined.A Thr deficiency group(Thr-D,0.46%Thr)and a Thr sufficiency group(Thr-S,0.71%Thr)were selected for subsequent proteomic and phosphoproteomic *** results showed that Thr-D reduced the growth performance(P<0.001),and increased the plasma concentrations of cholesterol,high-density lipoprotein cholesterol,low-density lipoprotein cholesterol,and hepatic TG(P<0.05).Thr-D increased gene expression related to fatty acid and TG synthesis(P<0.05).A total of 176 proteins and 259 phosphosites(containing 198 phosphoproteins)were observed to be differentially expressed as a result of *** upregulated proteins were enriched in the pathway related to amino acid metabolism,*** down-regulated proteins were enriched in linolenic and arachidonic acid metabolism,and the Janus kinase-signal transducer and activator of transcription(JAK-STAT)signaling *** upregulated phos-phoproteins were enriched in the pathways related to fatty acid biosynthesis,fructose and mannose metabolism,and glycolysis/***-D reduced the phosphorylation of STAT1 at S729 and STAT3 at S728,and expression of *** contrast,Thr-D increased non-receptor tyrosine-protein kinase(TYK2)expression and STAT1 phosphoryla

关键词： Threonine deficiency Triglyceride accumulation Proteomic Phosphoproteomic Pekin duck

预变形及时效处理对7055铝合金组织和性能的影响

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2006年第8期35卷 1276-1279页

作者：李海王芝秀郑子樵江苏工业学院江苏常州213016 中南大学湖南长沙410083

通过拉伸试验、金相观察、X射线衍射以及TEM观察,研究了7055铝合金固溶处理后,经不同程度冷变形和时效后的力学性能和电导率的变化以及相应的微观组织变化特点。实验结果表明,对于冷变形再T6时效的7055铝合金,随变形量的提高,强度先略... 详细信息

通过拉伸试验、金相观察、X射线衍射以及TEM观察,研究了7055铝合金固溶处理后,经不同程度冷变形和时效后的力学性能和电导率的变化以及相应的微观组织变化特点。实验结果表明,对于冷变形再T6时效的7055铝合金,随变形量的提高,强度先略有上升,而后缓慢下降。RRA态合金强度随变形量增加而持续下降。随变形量的增加,冷轧态7055铝合金的电导率逐渐下降,而T6和RRA态合金的电导率却逐渐上升。在同样变形量条件下,RRA态合金具有最高的电导率。这些变化与变形引入的位错所产生的晶格畸变以及位错促进粗大平衡相析出有关。

关键词： 7055铝合金预变形时效处理组织与性能

热处理制度对含Ag的7055铝合金断裂特征的影响

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2005年第4期34卷 612-616页

作者：李海郑子樵王芝秀中南大学湖南长沙410083

研究了含Ag7055铝合金在T6,T73,RRA3种热处理状态下的力学性能、断裂特征及显微组织变化特征。实验结果表明,RRA处理可以在保持T6状态强度的同时,获得较高的电导率,然而试样的延伸率相对较低;断口SEM形貌观察表明,T6状态断裂机制为剪切... 详细信息

研究了含Ag7055铝合金在T6,T73,RRA3种热处理状态下的力学性能、断裂特征及显微组织变化特征。实验结果表明,RRA处理可以在保持T6状态强度的同时,获得较高的电导率,然而试样的延伸率相对较低;断口SEM形貌观察表明,T6状态断裂机制为剪切型穿晶断裂和沿晶断裂同时并存,而T73处理后,主要呈韧窝型穿晶断裂,沿晶断裂部分减少,RRA试样断口则主要为沿晶断裂,并在晶界面上分布有韧窝型断裂特征;由于不同热处理状态下,强化相不同且其阻碍位错滑移能力也不同,同时晶界PFZ宽度也发生变化,这些因素的综合作用导致不同热处理状态下的断裂特征不同。

关键词： 7055铝合金热处理制度断裂特征沿晶断裂穿晶断裂

Ionothermal Synthesis of a New Open-Framework Iron Phosphate-oxalates

在线全文

学校读者我要写书评

暂无评论

Ionothermal Synthesis of a New Open-Framework Iron Phosphate...

7055铝合金二次时效特征研究——(I)力学性能

中国晶体学会第六届学术年会暨会员代表大会（功能分子晶体分会）

作者： zhixiu wang Tan Su Jingyao Liu Institute of Theoretical Chemistry Jilin University

A new iron phosphate-oxalates open-framework material,(CHNO)Fe(CO)(HPO)(JUI-5,Jilin University Ionothermal synthesis-5),has been synthesized under ionothermal conditions in the presence of the L-histidine as a structure-directing *** structure is determined by single-crystal X-ray diffraction and further characterized by powder XRD,thermogravimetric(TG) analysis and magnetic *** crystallizes in a monoclinic system of space group C2/c,with lattice parameters a=10.368(2) ?,b=12.727(3) ?,c=22.944(7) ?,β=102.130(6)°.The TG analysis shows the crystalline structure is stable up to 250 *** study reveals that the compound shows a interesting magnetic behavior at low *** on this theme is currently in progress and other applications will follow-up reports.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

稀有金属材料与工程 2005年第8期34卷 1029-1032页

作者：李海郑子樵王芝秀中南大学湖南长沙410083

利用维氏硬度和拉伸力学性能测试、Kahn撕裂试验等方法,研究二次时效对7055铝合金力学性能的影响。结果表明,经过120℃,150℃和180℃高温欠时效,甚至峰值时效处理后,再进行60℃和100℃低温二次时效,可以获得超过相应单级峰值时效的硬度... 详细信息

利用维氏硬度和拉伸力学性能测试、Kahn撕裂试验等方法,研究二次时效对7055铝合金力学性能的影响。结果表明,经过120℃,150℃和180℃高温欠时效,甚至峰值时效处理后,再进行60℃和100℃低温二次时效,可以获得超过相应单级峰值时效的硬度和强度。Kahn撕裂试验表明,二次时效温度从60℃提高到100℃,可以缩短二次峰值硬化时间,但不利于7055铝合金断裂韧性的改善。在相同预时效温度下,缩短预时效时间比峰值时效状态更有利于断裂韧性的改善。较低预时效和二次时效温度以及较短预时效时间有利于获得强度和断裂韧性的良好配合。

关键词： 7055铝合金二次时效 Kahn撕裂试验力学性能

同方期刊数据库