4篇
您的检索式：作者名="Minfang You"
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| 1 | Effects of grain size on the corrosion resistance of pure magnesium by cooling rate-controlled solidification显示文摘 | Yichi LIU Debao LIU then YOU Minfang CHEN | 2015 | Frontiers of Materials Science2015，9，3： | 3 |
| 2 | Effect of nano-CaO particle on the microstructure,mechanical properties and corrosion behavior of lean Mg-1Zn alloy显示文摘The effects of nano-CaO contents on the microstructure,mechanical properties and corrosion resistance of lean Mg-1Zn alloy were investigated.The results showed that the addition of nano-CaO significantly refined the grain size and improved mechanical properties of the Mg-1Zn alloy.At the same time,CaO reacted with molten Mg in situ to form nano-MgO,whose corrosion product in SBF solution was the same with the degradation product of Mg matrix,resulting in the enhanced compactness of the Mg(OH)_(2) layer and reduced corrosion rate of matrix.The Mg-1Zn alloy had lower corrosion resistance due to excessively large grain size and shedding of corrosion products.The composite with 0.5 wt.%CaO had the best corrosion resistance with a weight loss of 9.875 mg·y^(-1)·mm^(-2)due to the small number of Ca_(2)Mg_(6)Zn_(3) phase and suitable grain size.While for composites with high content of CaO(0.7 wt.%and 1.0 wt.%),they had lower corrosion resistance due to the coexistence of large number of Ca_(2)Mg_(6)Zn_(3) and Mg_(2)Ca at grain boundaries,especially for 1.0 wt.%CaO composite,resulting from the strong micro-galvanic corrosion. | Guangxin Shen Shaoyuan Lyu Leiting Yu Tianlu Li Chen You Xuewei Wang Minfang Chen Bin Jiang | 2024 | Journal of Magnesium and Alloys2024，12，2： | 0 |
| 3 | Sources and transformations of nitrite in the Amundsen Sea in summer 2019 and 2020 as revealed by nitrogen and oxygen isotopes显示文摘In this study,the nitrogen and oxygen isotope compositions of nitrite in the upper 150 m water column of the Amundsen Sea in the summer of 2019 and 2020 were measured to reveal the distribution and transformation of nitrite in the euphotic zone of the Southern Ocean.We found that primary nitrite maxima(PNMs)are widely present in the Amundsen Sea,where the depth of occurrence deepens from east to west and nitrite concentrations increases.Evidence from dual isotopes suggests that the formation of PNMs in all regions of the Amundsen Sea is dominated by ammonia oxidation.More importantly,the nitrogen and oxygen isotope compositions of nitrite in the Amundsen Sea mixed layer are abnormal,and their depth profiles are mirror symmetrical.Isotopic anomalies exhibit spatial variations,with central surface water having the lowest nitrogen isotope composition(−89.9‰±0.2‰)and western surface water having the highest oxygen isotope composition(63.3‰±0.3‰).Isotopic exchange reaction between nitrate and nitrite is responsible for these isotope anomalies,as both nitrogen and oxygen isotopes have large isotopic fractionation and opposite enrichment effects.This proves that isotopic exchange reaction operates extensively in different regions of the Amundsen Sea.Our study highlights the unique role of dual isotopes of nitrite in deepening the understanding of nitrogen cycle.Further studies on ammonia oxidation and isotopic exchange between nitrate and nitrite are warranted in the future to understand their roles in the nitrogen cycle in the Southern Ocean. | Yangjun Chen Jinxu Chen Yi Wang You Jiang Minfang Zheng Yusheng Qiu Min Chen | 2023 | Acta Oceanologica Sinica2023，42，4： | 0 |
| 4 | Effects of Genetic Variation in the 20th Intron of Sansui Duck ATP2A2 Gene on Eggshell Quality显示文摘In order to explore the influence of the polymorphism in the 20intron region of the Sansui duck ATP2A2 gene on the eggshell quality,this study used Primer Premier 5 software to design and synthesize a pair of primers in the 20 intron region,two-way direct sequencing and sequence alignment to mine SNPs Sites,SPSS 18.0 software was used to analyze the relationship between SNP sites and eggshell quality of Sansui duck.Three SNP sites were found in the 20 intron region of the ATP2A2 gene:g.40874 T>C,g.40920 G>A and g.40990 T=C,all of which were moderately polymorphic,at the site g.40874 T>C and g.40920 G>A both deviated significantly from Hardy-Weinberg equilibrium(P>0.05),position g.40990 T=C accords with Hardy-Weinberg equilibrium(P<0.05),and position g.40874 T>C There is a strong linkage disequilibrium between g.40990 T=C;a total of 4 haplotypes and 9 double types were detected at 3 SNP loci;the results of association analysis showed that g.40874 T>C mutation had a significant effect on eggshell strength and eggshell weight.The eggshell strength of CC genotype was significantly higher than that of TC and TT genotypes(P<0.05),the eggshell weight of CC genotype was significantly higher than that of TC genotype(P<0.05),and 40990 T=C mutation had a significant effect on eggshell strength.The eggshell strength of TC genotype was significantly higher than that of the TT genotype(P<0.05).In summary,the g.40874 T>C and g.40990 T=C found in the 20th intron region of the Sansui duck ATP2A2 gene may be the marker sites that affect the quality of the eggshell. | Junhan Mei Yiyu Zhang Minfang You Chaomei Liao Guanghui Tan Jiezhang Li | 2021 | Journal of Zoological Research2021，3，2： | 0 |
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