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1دورية أكاديمية
المؤلفون: Hongmei Xie, En Yu, Huamei Wen, Bayi Jiang, Guihua Fu, Haitao Sun, Jun He
المصدر: Agriculture, Vol 13, Iss 9, p 1654 (2023)
مصطلحات موضوعية: phytoestrogen, daidzein, intestinal health, growth performance, rabbit, Agriculture (General), S1-972
الوصف: The main purpose of the present research was to evaluate the effect of varying levels of DA inclusion in maternal diet, in the form of powder, on the born-weaning growth performance (days 1–30) and intestinal health of neonatal rabbits. A total of 152 delivered maternal does (3.94 ± 0.05 kg) were allocated into four groups, with thirty-eight replicates of one doe each, and fed with a control diet (CON) supplemented with different levels of powdered DA (85 mg/kg (DA85), 170 mg/kg (DA170), and 340 mg/kg (DA340)) during lactation. The results show that dietary DA increased individual body weight at days 21 and 30 (p = 0.03 and p < 0.01) and showed a linear and quadratic effect on individual body weight and average daily gain (ADG) (p < 0.05), although ADG was not affected by DA. The serum progesterone (P) (p = 0.05) and glutathione peroxidase (GSH-Px) (p = 0.01) concentrations of maternal rabbits were increased in all maternal DA-supplemented groups and showed a linear and quadratic effect (p < 0.05), while a linear effect was observed in estrogen (E-2) (p < 0.05). Interestingly, the concentrations of the serum insulin-like growth factor-1 (IGF-I) (p < 0.01) and immunoglobulin (IgA and IgG) (p < 0.01 and p = 0.01) in neonatal rabbits were increased in all dietary DA groups, and both showed a linear and quadratic effect (p < 0.05). In addition, the serum interleukin (IL-1β) (p = 0.03) and catalase (CAT) (p = 0.04) concentrations were affected by DA supplements, but linear and quadratic effects were only observed in the catalase (CAT) of neonatal rabbits (p < 0.05). Importantly, the duodenal and jejunal villus heights (p < 0.04 and p = 0.01) and the ratio of villus height to crypt depth (p = 0.02 and p = 0.01) in neonatal rabbits were elevated in all DA-supplemented treatments, while a linear and quadratic effect was observed in jejunum, but a quadratic effect was observed in duodenum (p < 0.05). The ileal villus height (p < 0.01) was also elevated in all DA-supplemented treatments exhibiting both linear and quadratic effects (p < 0.05). Moreover, the expression levels of occludin (p = 0.04), zonula occludens-1 (ZO-1) (p < 0.01), IGF-1 (p = 0.03), and solute carrier family 5 member 9 (SCL5A9) (p < 0.01) in jejunum were markedly elevated in the DA175 and 340 mg/kg DA-supplemented groups and were showing linear and quadratic effects (p < 0.05). Finally, inflammation-related gene expression levels such as NF-κB, TLR4, and MYD88 in jejunal (p = 0.01, p = 0.04, and p < 0.01) and ileal (p = 0.04, p = 0.04, and p = 0.03) epithelium were decreased in the DA170 and DA340 groups (p < 0.05), while linear and quadratic effects were observed for TLR4 in jejunum and for NF-κB and TLR4 MYD88 in ileum (p < 0.05). In summary, as a functional additive, maternal DA supplementation with 170 and 340 mg/kg DA during lactation can promote the growth of neonatal rabbits, which is related to improved antioxidative capacity and immunity, as well as improved intestinal health in neonatal rabbits.
وصف الملف: electronic resource
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2دورية أكاديمية
المؤلفون: Shiqin Liao, Jie Li, Mingting Liu, Hongmei Xie, Yutong Lu, Yunlan Jiang
المصدر: PLoS ONE, Vol 18, Iss 4, p e0284865 (2023)
الوصف: BackgroundAlthough HIV testing is helpful for early detection and treatment of HIV, its utilization rate is low among college students in China. Understanding the acceptance and associated factors of HIV testing is the key to improve the detection rate. The purpose of the systematic review was to examine the acceptance and associated factors of HIV testing (including HIV self-testing and HIV counseling and testing services) among college students in China.MethodsThis systematic review was reported following PRISMA guidelines 2020. Electronic sources such as PubMed, Embase, Web of Science, CNKI, CBM, Wanfang Database and VIP Database were searched for relevant studies published before September 2022. The tool by Agency for Healthcare Research and Quality (AHRQ) was used to assess quality for cross-sectional studies. The random-effects and fixed-effect model were employed to estimate the pooled proportions and associated factor of HIV testing acceptance. The Cochrane's Q statistic and I2 test were used to examine heterogeneity. All the quantitative meta analyses were conducted using STATA version 12 software.ResultsA total of 21 eligible studies with 100, 821 participants were included in the systematic review. The pooled acceptance rate of HIV testing was 68% (95% CI = 60, 76), and varies between regions in China. Male, heterosexual and urban college students had higher HIV testing acceptance. Gender, medical specialty, sexual education, sexual behavior, HIV/AIDS knowledge, perception HIV risk, and previous HIV testing were the factors associated with HIV testing acceptance.ConclusionThe review revealed that most of the college students intend to accept HIV detection, and the proportion of acceptance influenced by different factors. Therefore, the government and universities should implement targeted measures, improve HIV testing services, and promote HIV testing behavior.Systematic review registrationPROSPERO CRD42022367976.
وصف الملف: electronic resource
العلاقة: https://doaj.org/toc/1932-6203Test
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3دورية أكاديمية
المؤلفون: Hongmei Xie, Yongyi Wei, Bin Jiang, Changping Tang, Chaoyin Nie
المصدر: Journal of Materials Research and Technology, Vol 12, Iss , Pp 138-149 (2021)
مصطلحات موضوعية: Magnesium alloy, Tribological properties, CNT and nano-SiO2, Lubricant additive, Deionized water, Mining engineering. Metallurgy, TN1-997
الوصف: The major objective of this work was to evaluate the tribological properties of the carbon nanotube/spherical SiO2 nanoparticles combinations as lubricant additives in deionized water. The tribological experiments were carried out on a linear reciprocating ball-on-plate tribometer at magnesium alloy/steel interfaces. The results demonstrate that dispersion of CNT/SiO2 combinations in deionized water exhibited superior tribological properties as well as the load-bearing capacity and lubrication film stability than individual CNT or SiO2 nanofluids. It especially emphasizes the outstanding tribological properties of the CNT/SiO2 combinations with a mass ratio of 0.2:0.3. The friction coefficient is decreased by 30.6% and the wear volume is decreased by 52.5%, when compared to the 0.5 wt % CNT nanofluids. The enhanced performances are most likely driven by the sliding-induced tribofilm of CNT and the possible ball bearings effect of nano-SiO2. These findings could provide new insights into the understanding and application of carbon nanomaterials-based combinations as water based lubricant additive and help to develop specific lubricants for magnesium alloy forming.
وصف الملف: electronic resource
العلاقة: http://www.sciencedirect.com/science/article/pii/S2238785421002052Test; https://doaj.org/toc/2238-7854Test
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4دورية أكاديمية
المؤلفون: Dan Zhou, Zhibo Tong, Hongmei Xie, Jiaotong Sun, Fenggui Chen
المصدر: Materials, Vol 16, Iss 7, p 2681 (2023)
مصطلحات موضوعية: tungsten oxide, nanocrystalline, electrochromic property, additive, complexation, sol–gel method, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
الوصف: To improve the electrochromic (EC) properties of sol–gel-derived WO3 films, a series of organic small molecules, such as dopamine (DA), catechol, tyramine, phenol and 2-phenylethylamine, were added into peroxotungstic acid precursor sols as structure-directing additives, and five modified WO3 films were prepared by a simple and low-cost complexation-assisted sol–gel method. The effects of the above additives on the EC properties of the modified WO3 films have been studied in detail. Compared with the pure WO3 polycrystalline film, all the modified films combine the advantages of nanocrystalline and amorphous phases and show higher EC properties attributed to the unique nanocrystal-embedded amorphous structure. The results indicate that different additives with different numbers and types of functional groups (hydroxyl and amino groups) can change the microstructure, morphology, and thus electrochemical and EC properties of the films in various degrees. The additives, in order of their strong interactions with the sols, are DA, catechol, tyramine, phenol and 2-phenylethylamine, primarily depending on the number of hydroxyl groups. Of all the additives, DA with both catechol hydroxyl and amino groups shows the most positive effect; that is, the WO3 film modified with DA exhibits the best EC properties in terms of contrast, switching speed, stability, and coloration efficiency.
وصف الملف: electronic resource
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5دورية أكاديمية
المؤلفون: Fengjiao Wang, Zhifa Cheng, Lidan Deng, Hongmei Xie, Benjing Xu, Zhaojie Jiao, Guilin Zhou, Xianming Zhang
المصدر: Journal of Saudi Chemical Society, Vol 24, Iss 10, Pp 733-741 (2020)
مصطلحات موضوعية: Cu/γ-Al2O3 catalyst, Catalytic hydrogenation, Methyl laurate, C12 alcohol, Chemistry, QD1-999
الوصف: The Cu/γ-Al2O3 catalysts with different Cu loadings were prepared by impregnation method. The physicochemical properties of these Cu/γ-Al2O3 catalysts were characterized by H2-TPR, XRD, and in-situ XPS. The catalytic hydrogenation performances of methyl laurate over Cu/γ-Al2O3 catalysts were studied. The results show that the hydrogenation performances of methyl laurate on Cu/γ-Al2O3 catalyst are related to the dispersion, crystallite size, and content of the active component Cu0. The 10CA catalyst has the best hydrogenation performances for methyl laurate to produce C12 alcohol. At 300 °C, the conversion of methyl laurate and the selectivity of C12 alcohol are 55.6% and 30.4%, respectively.
وصف الملف: electronic resource
العلاقة: http://www.sciencedirect.com/science/article/pii/S1319610320301022Test; https://doaj.org/toc/1319-6103Test
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6دورية أكاديمية
المؤلفون: Jing Wang, Zhiyuan Yan, Kuan-Ching Li, Hongmei Xie, Xiangyang Liu
المصدر: IEEE Access, Vol 8, Pp 38622-38632 (2020)
مصطلحات موضوعية: Cyber-physical-social systems (CPSS), distributed storage systems, local codes with cooperative repair, minimum storage regenerating (MSR) codes, storage overhead, repair bandwidth overhead, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
الوصف: Integrating cyber, physical, and social spaces together, cyber-physical-social systems (CPSS) bring more conveniences to humans. For practical applications and user convenience, it is essential that the Big Data produced in CPSS be stored in the distributed storage systems of CPSS. In this paper, we study the fault tolerance scheme for distributed storage systems of CPSS, and propose a framework that can recover multiple failed nodes simultaneously. Considering the reliability of storage nodes in distributed storage systems, the research on locally repairable codes has mostly focused on repairing failed nodes within each repair group. However, when entire repair groups have failed, existing locally repairable codes cannot repair more than one failed group. In this paper, local codes with cooperative repair that can recover more than one failed group are proposed. Specifically, the proposed local codes are constructed based on minimum storage regenerating (MSR) codes, and have an interleaving structure among the local codes, so that the parity symbols of any local code can be generated from the MSR codes in its two adjacent local codes. Taking advantage of this property, more than one failed local group can be repaired cooperatively by their adjacent local groups with lower repair locality. Furthermore, the key parameters of local codes with cooperative repair are derived. Theoretical analysis and simulation results show that, compared with previous codes with local regeneration, our codes have higher bandwidth overhead when repairing failed nodes, but advantages in storage overhead and repair locality either for repair of a single failed node or one failed local group. Moreover for a single failed local group, local codes with cooperative repair achieve almost the same tradeoff curve of storage overhead and bandwidth overhead as MSR-local codes and minimum bandwidth regenerating local (MBR-local) codes.
وصف الملف: electronic resource
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7دورية أكاديمية
المؤلفون: Jiahong Dai, Hongmei Xie, Yangyang Zhou, Qin Zou, Yuan Tian, Qingshan Yang, Cheng Peng, Bin Jiang, Jianyue Zhang
المصدر: Metals, Vol 12, Iss 7, p 1233 (2022)
مصطلحات موضوعية: AZ63, galvanized, T6 heat treatment, solid–liquid compound casting, Mining engineering. Metallurgy, TN1-997
الوصف: AZ63 sacrificial anode is widely used to protect buried metal pipelines and reinforced concrete structures and so on. The interfacial metallurgical bonding between AZ63 sacrificial anode and Q235 wiring terminal directly affects its cathodic protection performance. Therefore, microstructure and mechanical properties of interfacial between AZ63 and Q235 by solid–liquid compound casting with hot-dip galvanized and post-casting solution-aging treatment (T6) were investigated. The results indicate that hot-dip galvanizing on the surface of Q235 is beneficial to the formation of intermetallic compounds at the interface. At the same time, it can promote the metallurgical bonding of the interface between AZ63 and Q235. After T6 heat treatment, the intermetallic compound at the interface between AZ63 and galvanized Q235 was refined. The electron-probe microanalyzer (EPMA) revealed that the intermetallic compounds at the interfaces between AZ63 and galvanized Q235 were Fe2Al5 before and after T6 treatment. Push-out testing and microhardness were used to investigate the mechanical properties of interface between AZ63 and Q235. It is shown that the hot-dip galvanization of the Q235 surface and T6 treatment were beneficial to improve the metallurgical bonding shear strength and microhardness of the interface. After T6 heat treatment, the highest shear strength at the interface between AZ63 and galvanized Q235 was up to 31.9 ± 1.9 MPa.
وصف الملف: electronic resource
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8دورية أكاديمية
المؤلفون: Hongmei Xie, Bin Jiang, Xingyu Hu, Cheng Peng, Hongli Guo, Fusheng Pan
المصدر: Nanomaterials, Vol 12, Iss 14, p 2364 (2022)
الوصف: In the original publication [...]
وصف الملف: electronic resource
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9دورية أكاديمية
المؤلفون: Liyan Wang, Bin Zhang, Hongmei Xie, Wenwei Ji, Xiang Huang
المصدر: Advances in Civil Engineering, Vol 2021 (2021)
مصطلحات موضوعية: Engineering (General). Civil engineering (General), TA1-2040
الوصف: Modern coastal cities continue to expand to the sea, but the marine silt foundation has high water content and poor bearing capacity. Therefore, it is necessary to find economical and rapid ways to reduce the water content of the silt and improve the bearing capacity of the silt foundation. The steel slag is considered to be incorporated into silt to effectively reduce the moisture content of soil and improve the bearing capacity of the foundation due to its hard texture and strong water absorption capacity. In this paper, the shear strength characteristics of marine silt modified by steel slag were studied using an automatic triaxial instrument, as well as the relationship between steel slag incorporation and modified silt density. Experimental results showed that the incorporation of steel slag can effectively improve the shear strength of the silt. Besides, the influences of water content, steel slag incorporation, and confining pressure on the stress-strain curve characteristics and failure deviatoric stress of modified silt were also analyzed. The addition of steel slag increases the failure deviatoric stress of the silt. However, the increase of water content will weaken the effect of steel slag incorporation. The shear strength index of improved silt with different steel slag incorporation was compared with that of traditional soil, verifying the feasibility of its application in engineering construction.
وصف الملف: electronic resource
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10دورية أكاديمية
المؤلفون: Shuqing Chen, Qi Ding, Yan Gu, Xin Quan, Ying Ma, Yulong Jia, Hongmei Xie, Jinzhu Tang
المصدر: Nanomaterials, Vol 12, Iss 1, p 139 (2021)
مصطلحات موضوعية: fullerenol, nanodiamonds, water-based lubricant additive, a-C, nano-bearing effects, Chemistry, QD1-999
الوصف: The tribological performances of fullerenol and nanodiamonds (NDs) as additives in water-based lubricants for amorphous carbon (a-C) coatings are investigated to avoid disadvantage factors, such as chemical reactions and deformation of particles. The effects of size and additive amount on tribological properties of nanoparticles are studied by rigid nanoparticles within the dot size range. The results show that owing to its small particle size (1–2 nm), fullerenol cannot prevent direct contact of the friction pair at low concentration conditions. Only when the quantity of fullerenol increased to support the asperity contact loads in sufficient concentration did nano-bearings perform well in anti-friction and anti-wear effects. Unlike fullerenol, nanodiamond particles with a diameter of about 5–10 nm show friction-reducing effect based on the nano-bearing effects at ultra-low concentration (0.01 wt.%), whereas particles at higher concentration block the rolling movement, hence increasing the coefficient of friction (COF) and wear. As a result of the effect of difference in size, fullerenol provides a better overall lubrication, but it is hard to reach a friction coefficient as low as NDs even under the optimal conditions.
وصف الملف: electronic resource
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