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RISS 인기검색어
- 검색키워드
- 저자 : Chenggang Li (검색결과 5 건)
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Research on fatigue remaining life of structures for a dynamic lifting process of a bridge crane
Chenggang Li,Qisong Qi,Qing Dong,Yannan Yu,Yu Fan 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.4
A conventional quasi-static load method causes small stress amplitude and less stress change times when calculating the stress change of crane structures, leading to inaccurate prediction results of the structural fatigue life of the crane. Thus, by investigating the dynamic impact of the crane in the lifting process, the dynamic model of the lifting process was constructed in this study to explore the load variation of a crane structure. A fatigue life prediction method considering the lifting impact effect is proposed to analyze the fatigue life of structures. The calculation results indicate that the lifting impact process increases the number of stress cycles in structures, which has a negative impact on the structural fatigue life. Therefore, determining the dynamic response relationship between the lifting impact effect and the fatigue life of a crane structure can help improve the safety of this structure.
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Jinhua Li,Xiaoxing Su,Yinlei Wang,Wei Yang,Yu Pan,Chenggang Su,Xingguo Zhang 한국유전학회 2018 Genes & Genomics Vol.40 No.1
BTB (broad-complex, tramtrack, and bric-abrac) family proteins are characterized by the presence of a protein–protein interaction BTB domain. BTB proteins have diverse functions, including transcriptional regulation, protein degradation, chromatin remodeling, and cytoskeletal regulation. However, little is known about this gene family in tomato (Solanum lycopersicum), the most important model plant for crop species. In this study, 38 BTB genes were identified based on tomato whole-genome sequence. Phylogenetic analysis of BTB proteins in tomato revealed that SlBTB proteins could be divided into at least 4 subfamilies. The SlBTB proteins contains 1–3 BTB domains, and several other types of functional domains, including KCTD (Potassium channel tetramerization domain-containing), the MATH (meprin and TRAF homology), ANK (Ankyrin repeats), NPR1 (nonexpressor of pathogenesis-related proteins1), NPH3 (Nonphototropic Hypocotyl 3), TAZ zinc finger, C-terminal Kelch, Skp1 and Arm (Armadillo/betacatenin- like repeat) domains are also found in some tomato BTB proteins. Moreover, their expression patterns in tissues/ stages, in response to different abiotic stress treatments and hormones were also investigated. This study provides the first comprehensive analysis of BTB gene family in the tomato genome. The data will undoubtedly be useful for better understanding the potential functions of BTB genes, and their possible roles in mediating hormone cross-talk and abiotic stress in tomato as well as in some other relative species.
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Xiaohu Luo,Bo Chen,Ji Li,Bang Lan,Chenliang Zhou,Zhengxing Ren,Chenggang Ci,Yali Liu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
Herein, we report a rational design and synthesis of a highly-efficient and eco-friendly glucomannanderivative (GA-2) by the introduction of the thiazole and Schiff base groups into glucomannan (GA). After confirmation of GA-2 by the spectroscopic methods, it was introduced as corrosion inhibitor withexcellent anti-corrosion action for mild steel (MS) in the simulated seawater. As-obtained results revealthat GA-2 has a significantly enhanced anticorrosion performance, and its inhibitive efficiency reaches98.8% at the 0.5 mmol L1 inhibitor concentration, much higher than that of GA (69.8%) and the intermediatederivative GA-1 (81.2%). The significantly enhanced protection performance could be attributed tothe rich S heteroatoms, aromatic rings, and Schiff base groups in the GA-2, which strongly promotes thechemisorption as well as physisorption between GAD and MS. X-ray photoelectron spectroscopy (XPS)results, show that the appearance of N-Fe and S-Fe bonds confirms the strongly anchoring interactionbetween GA and MS. Furthermore, according to the quantum chemical calculations, the results fromthe lowe energy gap and radical distribution function (RDF) analyses further confirm the strongchemisorption of GA-2 at the surface of steel, which illustrates the excellent inhibition performance atthe molecule and atom level.
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Reaction kinetics for synthesis of isopropyl myristate catalyzed by sulfated titania
Ting Qiu,Lihua Zhou,Yu Niu,Jinbei Yang,Chenggang Li,Xiaoting Guo,Ling Li 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.8
Sulfated titania (SO4 2−/TiO2) was prepared and characterized by nitrogen adsorption-desorption, FT-IR, thermostability analyzer, XRD and particle size analyzer. The esterification of myristic acid (MA) with isopropanol (IPOH) catalyzed by the solid super acid SO4 2−/TiO2 was studied. The effect of reaction kinetics conditions such as temperature, stirrer speed, initial mole ratio of alcohol to acid, and catalyst loading on the conversion of myristic acid was investigated. A second-order pseudo-homogeneous model was developed to calculate the rate of the reaction, and then the kinetic parameters were estimated. The calculated values were in agreement with experimental data.
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