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Novel zinc sources as antimicrobial growth promoters for monogastric animals: a review
( Xin Jian Lei ),( Zhang Zhuang Liu ),( Jae Hong Park ),( In Ho Kim ) 한국축산학회 2022 한국축산학회지 Vol.64 No.2
The essentiality of zinc for animals has been recognized over 80 years. Zinc is an essential trace element that is a component of many enzymes and is associated with the various hormones. Apart from the nutritional function, zinc has antimicrobial property and often be supplemented in diets in the quantities greater than which is required to meet the nutritional requirement, especially for weaning pigs. This review will focus on the application of pharmacological zinc and its mechanisms which may be responsible for the effects of zinc on performance and health of monogastric animals. Various novel sources of zinc in non-ruminant animal production will also be discussed. These should assist in more precisely formulating feed to maximize the production performance and to maintain the health condition of monogastric animals.
Lei, Xin Jian,Kim, Yong Min,Park, Jae Hong,Baek, Dong Heon,Nyachoti, Charles Martin,Kim, In Ho John Wiley Sons, Ltd 2018 Journal of the science of food and agriculture Vol.98 No.4
<P>CONCLUSIONThe results indicate that dietary supplementation with increasing levan-type fructan enhanced growth performance, improved nutrient digestibility, and increased faecal lactic acid bacteria counts in weaning pigs linearly. (c) 2017 Society of Chemical Industry</P>
Lei-xin Nie,Lizhong Jiang,Yulin Feng,Wang-Bao Zhou,Xiang Xiao 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.46 No.1
This paper examines a high-speed railway CRTS-Ⅱ ballastless track-bridge system. Using the stationary potential energy theory, the mapping analytical solution between the bridge deformation and the rail vertical geometric irregularity was derived. A theoretical model (TM) considering the nonlinear stiffness of interlayer components was also proposed. By comparing with finite element model results and the measured field data, the accuracy of the TM was verified. Based on the TM, the effect of bridge deformation amplitude, girder end cantilever length, and interlayer nonlinear stiffness (fastener, cement asphalt mortar layer (CA mortar layer), extruded sheet, etc.) on the rail vertical geometric irregularity were analyzed. Results show that the rail vertical deformation extremum increases with increasing bridge deformation amplitude. The girder end cantilever length has a certain influence on the rail vertical geometric irregularity. The fastener and CA mortar layer have basically the same influence on the rail deformation amplitude. The extruded sheet and shear groove influence the rail geometric irregularity significantly, and the influence is basically the same. The influence of the shear rebar and lateral block on the rail vertical geometric irregularity could be negligible.
Experimental Study on Interfacial Shear Performance of RC Beams Added to Existing RC Columns
Xin-Ling Wang,Lei-Lei Jin,Ke Li,Jun-Tao Zhu 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.11
The primary objectives of this study were to experimentally investigate the shear characteristicsof the interface between an existing RC column and a reinforced concrete (RC) beam added to the existing RC column, and to propose a formula for estimating the shear capacity of the beam-column interface. The major test variables consisted of concrete strength, added steel reinforcement ratio and shear span to depth ratio. Failure characteristics, displacements at the loading point, slips of the beam-column interface, and shear capacities of the beam-column interface were analyzed. Test results indicate that both the shear capacity of the beam-column interface and the corresponding interfacial slip increased with a decrease in shear span to depth ratio. In addition, as concrete strength grew, the shear capacity of the beam-column interface increased, but the interfacial slip corresponding to the interfacial shear capacity remained almost unchanged. Moreover, both the shear capacity of the beam-column interface and the corresponding interfacial slip increased with an increase in the longitudinal steel reinforcement ratio of the added RC beam. A formula for predicting the shear capacity of the beam-column interface was developed. The test results validate the proposed formula and provide important guidance for the design of the RC beam added to the existing RC column.
Lei, Xin Jian,Bae, Jun,Lee, Ju,Lee, Sang,Kim, In Agricultural Research Communication Center 2017 Indian journal of animal research Vol.51 No.-
<P>The objective of the study was to evaluate the effects of expanded diets on growth performance, meat quality, and carcass characteristics in finishing pigs. A total of 80 finishing pigs [(Landrace × Yorkshire) × Duroc] were randomly allotted to two dietary treatments: 1) unexpanded corn-soybean meal diets; 2) expanded corn-soybean meal diets. Each treatment consisted of ten replicate pens with four pigs (2 gilts and 2 barrows) per pen. There were no differences in daily feed intake and daily gain throughout the experiment (P less than 0.05). However, expanded diets decreased feed conversion ratio compared with unexpanded diets (P less than 0.05). Expanded diets had no effect on carcass characteristics and meat quality with the exception of increased sensory evaluation (color) of meat compared with unexpanded diets (P less than 0.05). In conclusion, expanded diets can improve feed conversion ratio but have no effect on daily gain and daily feed intake and sensory evaluation of meat color.</P>
Lei, Xin Jian,Lee, Sang In,Lee, Kwang Yong,Nguyen, Dinh Hai,Kim, In Ho,Plaizier, J. Canadian Science Publishing 2018 Canadian journal of animal science Vol.98 No.4
<P> An experiment was conducted to assess effects of Enterococcus faecium and a blend of organic acids (OAs) and medium-chain fatty acids (MCFAs) in finishing pigs. A total of 120 pigs [Duroc × (Yorkshire × Landrace); 51.04 ± 1.82 kg] were randomly assigned to five dietary treatments: CON, basal diet; BOM1, CON + 500 mg kg<SUP>−1</SUP> blend of OAs and MCFAs; BOM2, CON + 1000 mg kg<SUP>−1</SUP> blend of OAs and MCFAs; EBOM1, BOM1 + 20 mg kg<SUP>−1</SUP> E. faecium; EBOM2, BOM2 + 20 mg kg<SUP>−1</SUP> E. faecium. Pigs fed EBOM1 and EBOM2 diets had higher average daily gain and average daily feed intake (during days 36-70 and days 1-70) and greater digestibility of dry matter (days 35 and 70) compared with those fed BOM1 and BOM2 diets (P @@<@@ 0.05). However, no differences on blood parameters and meat quality were observed between pigs offered BOM1 and BOM2 diets and those fed EBOM1 and EBOM2 diets (P @@>@@ 0.05). In conclusion, supplementation with the combination of E. faecium and a blend of OAs and MCFAs was more effective in improving growth performance and nutrient digestibility than supplementation with blend of OAs and MCFAs alone in finishing pigs. </P>
Xin-Lei Zhang,Ting-Yao Wang,Giovanni Targher,Christopher D. Byrne,Ming-Hua Zheng 대한당뇨병학회 2022 Diabetes and Metabolism Journal Vol.46 No.3
Non-alcoholic fatty liver disease occurring in non-obese subjects (the so-called non-obese NAFLD) is a highly prevalent but neglected liver condition, which is closely associated with metabolic disorders and suboptimal lifestyles. Landmark studies have shown that lifestyle interventions are potentially beneficial in decreasing the risk of developing non-obese NAFLD and in ameliorating NAFLD in non-obese individuals with pre-existing NAFLD. Lifestyle interventions usually refer to changes in eating habits and physical activity, both of which have a powerful effect on non-obese NAFLD and on risk factors for non-obese NAFLD. However, to date, patients and health-care professionals have a poor awareness and understanding of non-obese NAFLD and the beneficial effects of lifestyle interventions in this patient population. The aim of this narrative review is to briefly discuss the evidence for the effects of lifestyle changes and what changes are needed amongst medical personnel and other stakeholders in order to raise awareness of non-obese NAFLD.