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An exchange bias observed in Tb/Cr/FeCo trilayers with ultrathin Cr layer at low temperature
Sun Li,Li Xiaoyan,Zhang Yiwei,Song Hengbo,Zhang Wen,Kou Zhaoxia,Zhang Dong,Liu Xiaoying,Fei Hongyang,Pan Mengmei,Zhao Zhibin,Zhai Ya 한국물리학회 2022 Current Applied Physics Vol.44 No.-
Positive exchange bias field (He) is observed in Tb/Cr (tCr)/FeCo trilayers at 5 K without cooling field, and negative He for Tb/FeCo bilayer. The negative He of Tb/FeCo implies the FM coupling at the interface due to Co and Fe dominate in the magnetization of the ferrimagnetic interlayer alloy of FeCo and Tb. With the inserting of Cr layer, this situation is broken, and the positive He implies the antiferromagnetic interlayer coupling. A peak of He = 6.0 mT for trilayers with tCr = 1.5 nm is corresponding to the minimum value of coercivity as a function of tCr at 5 K, which is used to study the effect of the cooling field (Hfc) on He as a function of temperature. It is found that Hfc of 100 mT triggers He from positive to negative at T ≤ 15 K. The magnetoresistance results also confirm the coexistence of multiple MR mechanisms in these trilayers.
Relationships among bedding materials, bedding bacterial composition and lameness in dairy cows
Li, Han,Wang, Xiangming,Wu, Yan,Zhang, Dingran,Xu, Hongyang,Xu, Hongrun,Xing, Xiaoguang,Qi, Zhili Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.9
Objective: Bedding materials directly contact hooves of dairy cows and they may serve as environmental sources of lameness-associated pathogen. However, the specific composition of bacteria hidden in bedding materials is still not clear. The aim of this study was to determine the effect bedding material and its bacterial composition has on lameness of Holstein heifers. Methods: Forty-eight Holstein heifers with similar body weights were randomly assigned into three groups including sand bedding (SB), concrete floor (CF), and compost bedding (CB). Hock injuries severity and gait performance of dairy cows were scored individually once a week. Blood samples were collected at the end of the experiment and bedding material samples were collected once a week for Illumina sequencing. Results: The CF increased visible hock injuries severity and serum biomarkers of joint damage in comparison to SB and CB groups. Besides, Illumina sequencing and analysis showed that the bacterial community of CB samples had higher similarity to that of SB samples than CF samples. Bacteria in three bedding materials were dominated by gastrointestinal bacteria and organic matter-degrading bacteria, such as Actinobacteria, Firmicutes, and norank JG30-KF-cM45. Lameness-associated Spirochaetaceae and Treponeme were only detected in SB and CB samples with a very low relative abundance (0% to 0.08%). Conclusion: The bacterial communities differed among bedding materials. However, the treponemes pathogens involved in the pathogenesis of lameness may not be a part of microbiota in bedding materials of dairy cows.
Cushion Polyurethane Sandwich Composite Structures Strengthened by a Concave-Convex Fabric Panels
Ting-Ting Li,Peiyao Liu,Bing-Chiuan Shiu,Hongyang Wang,Hao-Kai Peng,Jia-Horng Lin,Ching-Wen Lou 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
In order to improve the low velocity impact resistance, flexible PU foam composites (FPUC) with a sandwichstructure are proposed. The interlayer is composed of a concave-convex fabric structure while the top/bottom layers are madeof polyurethane foam (PU). The core is prepared as follows. Seven warp knitted spacer fabric types (WKSF) (WKSF.1-7) arelaminated with different number of layers to form cuboids, which are fixed firmly between two layers of low melting pointpolyester (LMPET) fabrics via hot melting. The effects of spacer yarn density, spacer yarn inclination angle, combination ofspacer fabrics, and number of lamination layers on the dynamic cushion performance are evaluated. With the impact energybeing 16 J, FPUs demonstrate an energy absorption level that is 19 % and 39 % greater than PU and WKSF. Furthermore,ultra-high molecular weight polyethylene fabric can effectively enhance the surface strength. Finally, the results arecomputed via theoretical prediction formulae of dynamic buffer resistance is in conformity with the experimental test results.
Ruan Xinmin,Du Hongyang,Zhan Xinchun,Cong Xihan,Shi Fuzhi,Li Juan,Luo Zhixiang,Dong Zhaorong 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.1
Developing genotypes with high-nitrogen use efficiency is a prerequisite for achieving sustainable agriculture and high yields. In this study, both physiological and metabolic analyses were performed to evaluate the NUE (nitrogen use efficiency) of two elite indica rice cultivars: OM052 and Huanghuazhan (HHZ). The pNUE and gNUE of OM052 were higher than HHZ under three N conditions, and significant (p < 0.05) especially under both LN and MN conditions. The contents of soluble sugar and malate were significantly different between OM052 and HHZ under LN and HN conditions. The GDH activity in OM052 was significantly high than that in HHZ under HN condition. Metabolic analyses showed that 136 and 142 differentially accumulating metabolites were identified between OM052 and HHZ under LN and HN conditions, respectively. KEGG analysis showed that ‘aminoacyl-tRNA biosynthesis’ was also the most significant enriched in LN_OM052 vs. LN_ HHZ and ‘Glyoxylate and dicarboxylate metabolism’ and ‘citrate cycle’ were the most significantly enriched in HN_OM052 vs. HN_ HHZ. The contents of four metabolites (cis-aconitate, isocitrate, fumarate, and malate) involved in the TCA cycle were significantly upregulated in HN condition compared with LN condition, regardless of OM052 and HHZ. Taken together, the results of our study revealed the physiological and metabolic differences underlying the OM052 and HHZ and provide new insights into coordinating C and N metabolism and improving the NUE of rice.
Modelling of effective irradiation swelling for inert matrix fuels
Zhang, Jing,Wang, Haoyu,Wei, Hongyang,Zhang, Jingyu,Tang, Changbing,Lu, Chuan,Huang, Chunlan,Ding, Shurong,Li, Yuanming Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.8
The results of effective irradiation swelling in a wide range of burnup levels are numerically obtained for an inert matrix fuel, which are verified with DART model. The fission gas swelling of fuel particles is calculated with a mechanistic model, which depends on the external hydrostatic pressure. Additionally, irradiation and thermal creep effects are included in the inert matrix. The effects of matrix creep strains, external hydrostatic pressure and temperature on the effective irradiation swelling are investigated. The research results indicate that (1) the above effects are coupled with each other; (2) the matrix creep effects at high temperatures should be involved; and (3) ranged from 0 to 300 MPa, a remarkable dependence of external hydrostatic pressure can be found. Furthermore, an explicit multi-variable mathematic model is established for the effective irradiation swelling, as a function of particle volume fraction, temperature, external hydrostatic pressure and fuel particle fission density, which can well reproduce the finite element results. The mathematic model for the current volume fraction of fuel particles can help establish other effective performance models.
Ranran Liu,Yanfa Sun,Guiping Zhao,Hongyang Wang,Maiqing Zheng,Peng Li,Li Liu,Jie Wen 한국유전학회 2015 Genes & Genomics Vol.37 No.10
Identification of functional genes for multifactorial traits is an ongoing priority. A genome-wide association study and gene expression study for weight and carcass composition traits is presented here using a F2 resource population derived from a cross between slowand fast-growing chicken breeds. For weight traits, eight SNPs on GGA4 plus one SNP on GGA27 were significantly associated with two or more target traits, including body weight (BW) at day 56, BW93, carcass weight, eviscerated weight, breast weight (BrW), thigh muscle weight (ThW) and wing weight. Of 11candidate genes identified near significant SNPs, three were shown by Q-PCR to be differentially expressed in breast muscle between chickens selected from phenotypic extremes of carcass weight and BrW, including ligand dependent nuclear receptor corepressor-like protein and LIM domainbinding factor 2. For major carcass composition traits, nine significant SNPs on GGA1, GGAZ and GGA6 were identified as being associated with BrW and/or percentage. The wings apart-like homolog (Drosophila, WAPAL) on GGA6 had the most significant association with percentage of ThW.
Ginsenosides as dietary supplements with immunomodulatory effects: a review
Tang Ping,Liu Sitong,Zhang Junshun,Ai Zhiyi,Hu Yue,Cui Linlin,Zou Hongyang,Li Xia,Wang Yu,Nan Bo,Wang Yuhua 한국응용생명화학회 2024 Applied Biological Chemistry (Appl Biol Chem) Vol.67 No.-
Immune disorders have become one of the public health problems and imposes a serious economic and social burden worldwide. Ginsenosides, the main active constituents of ginseng, are regarded as a novel supplementary strategy for preventing and improving immune disorders and related diseases. This review summarized the recent research progress of ginsenosides in immunomodulation and proposed future directions to promote the development and application of ginsenosides. After critically reviewing the immunomodulatory potential of ginsenosides both in vitro and in vivo and even in clinical data of humans, we provided a perspective that ginsenosides regulated the immune system through activation of immune cells, cytokines, and signaling pathways such as MAPK, PI3K/ Akt, STAT, and AMPK, as well as positively affected immune organs, gut flora structure, and systemic inflammatory responses. However, the evidence for the safety and efficacy of ginsenosides is insufficient, and the immune pathways of ginsenosides remain incompletely characterized. We believe that this review will provide a valuable reference for further research on ginsenosides as dietary supplements with immunomodulatory effects.
Thermo-mechanical coupling behavior analysis for a U-10Mo/Al monolithic fuel assembly
Mao, Xiaoxiao,Jian, Xiaobin,Wang, Haoyu,Zhang, Jingyu,Zhang, Jibin,Yan, Feng,Wei, Hongyang,Ding, Shurong,Li, Yuanming Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.9
A typical three-dimensional finite element model for a fuel assembly is established, which is composed of 16 monolithic U-10Mo fuel plates and Al alloy frame. The distribution and evolution results of temperature, displacement and stresses/strains in all the parts are numerically obtained and analyzed with a self-developed code of FUELTM. The simulation results indicate that (1) the out-of-plane displacements of Al alloy side plates are mainly attributed to the bending deformations; (2) enhanced out-of-plane displacements appear in fuel plates adjacent to the outside Al plates, which results from the occurred bending deformations due to the applied constraints of outside Al plates; (3) an intense interaction of fuel foil with the cladding occurs near the foil edge, which appears more heavily in the fuel plates adjacent to the outside Al plates. The maximum first principal stresses in the fuel foil are similar for all the fuel plates and appear near the fuel foil edge; while, the through-thickness creep strains of fuel foil in the fuel plate near the central region of fuel assembly are larger, and the induced creep damage might weaken the fuel skeleton strength and raise the fuel failure risk.