Excess trehalose and glucose affects chitin metabolism in brown planthopper (Nilaparvata lugens)

Qi-Da Shen,Meng-Meng Yang,Guo-Qiang Xie,Hui-JuanWang,Lu Zhang,Ling-Yu Qiu,Shi-GuiWang,Bin Tang 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2

Trehalose is a non-reducing disaccharide that is hydrolyzed by trehalase to yield two glucose molecules. Trehalase is the first enzyme involved in the chitin biosynthesis pathway, and it plays a pivotal role in insect growth and molting. In this study, Nilaparvata lugens, an economically important rice pest in Southeast Asia, was injectedwith trehalose or glucose to investigate their effects on chitin metabolism. Excess trehalose and glucose significantly increased the rate of deformity (molting and/or wing deformities) and mortality in N. lugens. Trehalose, glycogen, and glucose contents were also significantly decreased in N. lugens treated with trehalose or glucose. Chitin content and the expression of NlHK, NlUAP, NlG6PI1, NlGFAT, NlGNPNA, NlPGM1, NlPGM2, NlCHS1, NlCHS1a, NlCHS1b, NlCht3, NlCht4, NlCht6, and NlCht7 were significantly decreased, whereas the expression of NlCht2, NlIDGF, and NlENGase was significantly increased in treated insects. Furthermore, a significant increase in the expression of NlTRE1-1, NlTRE2, and NlTPS1 and a decrease, in the expression of NlTPS2 were observed. Results of this study suggested that excess trehalose and glucose could affect chitin metabolism by regulating the expression of pivotal genes to decrease the chitin content, resulting in the inability of N. lugens to complete its molting process.

Brain Imaging Study on the Pathogenesis of Depression & Therapeutic Effect of Selective Serotonin Reuptake Inhibitors

Meng Qi,Zhang Aixia,Cao Xiaohua,Sun Ning,Li Xinrong,Zhang YunQiao,Wang Yanfang 대한신경정신의학회 2020 PSYCHIATRY INVESTIGATION Vol.17 No.7

Objective Predefining the most effective treatment for patients with depressive disorders remains a problem. We will examine the differential brain regions of gray matter (GM) in major depressive disorder (MDD) patients and the relationship between changes in their volume and the efficacy of early antidepressant treatment using magnetic resonance imaging (MRI).Methods 159 never-medicated patients with first-episode MDD and 53 normal control subjects (NCs) were enrolled. The brains were scanned by MRI and measured with the 17-item Hamilton Depression Rating Scale (HAMD-17) at baseline and after 2 weeks of treatment with selective serotonin reuptake inhibitor (SSRI)s, and the non-responder group and responder group were obtained. The patients were analyzed by voxel-based morphological (VBM) and SPSS software. Receiver operator characteristics (ROC) analysis was performed for the difference between the responder group and the non-responder group in the differential brain regions, and Pearson correlations were computed between volume size and HAMD score reduction rate.Results Smaller GM volume of the right superior temporal gyrus (STG), and the orbital parts of the right medial frontal gyrus and right inferior frontal gyrus were observed in MDD versus the NCs. The non-responder group demonstrated a significant volume reduction at the right STG compared with the responders, but no corresponding change in orbital part of right medial frontal gyrus and right inferior frontal gyrus. ROC analysis showed that Accuracy=71.2%. There was a positive correlation between the STG gray matter volume and the HAMD-17 score reduction rate (r=0.347, p=0.002).Conclusion The study results confirmed the local changes in brain structure in MDD and may initially predict the early treatment response produced by SSRIs as antidepressants.

Conjoint Analysis of User Needs in Mobile Payment Interface Design

Meng Qi,서종환(Jonghwan Seo),변재형(Jaehyung Byun) 한국스마트미디어학회 2020 스마트미디어저널 Vol.9 No.4

With the advent of the Internet era, consumer lifestyles have been changed tremendously, and mobile payment has carried out an increasingly extensive coverage of the people s life trajectory. Taking the design of the mobile payment interface as an example, we use a conjoint analysis method to survey college students in Guangxi, where questionnaires are collected from 270 people in different groups according to gender. The method separates the attributes that affect consumer choice of mobile payment interface design and the utility value of the attribute level to analyze consumer needs and preferences, and then obtains consumers potential evaluation criteria for mobile payment interface design. The results of the study show that the attributes that influence consumers choice of mobile payment interface design are, in order of preference: page layout, identification convenience, verification, module distribution, entertainment, and information encryption. Consumer groups of different genders show differences in their preferences in the mobile payment interface design and Consumer needs reflect consumer psychology. Several findings are obtained on the consumers preferences on the mobile payment interface design, which may be used to improve future design processes.

Genetic variations in the bitter taste receptor gene TAS2R38 are related to cigarette smoking behavior in Han Chinese smokers

Qi Fei-Yan,Zhu Zhou-Hai,Li Meng,Guan Ying,Peng Qi-Yuan,Lu She-Ming,Liu Zhi-Hua,Wang Ming-Feng,Miao Ming-Ming,Chen Zhang-Yu,Li Xue-Mei,Bai Jie,Yao Jian-Hua 한국유전학회 2022 Genes & Genomics Vol.44 No.11

Background: Smoking behavior is influenced by multiple genes, including the bitter taste gene TAS2R38. It has been reported that the correlation between TAS2R38 and smoking behavior has ethnicity-based differences. However, the TAS2R38 status in Chinese smokers is still unclear. Objective: This study aims to investigate the possible relationship between genetic variations in TAS2R38 (A49P, V262A and I296V) and smoking behaviors in the Han Chinese population. Methods: The haplotype analyses were performed and smoking behavior questionnaire was completed by 1271 individuals. Genetic association analyses for smoking behavior were analyzed using chi-square test. Further, for investigating the molecular mechanism of TAS2R38 variants effect on smoking behavior, we conducted TAS2R38-PAV and TAS2R38-AVI expression plasmids and tested the cellular calcium assay by cigarette smoke compounds stimulus in HEK293. Results: Significant associations of genetic variants within TAS2R38 were identified with smoking behavior. We found a higher PAV/PAV frequency than AVI/AVI in moderate and high nicotine dependence (FTND ≥ 4; X2 = 4.611, 1 df, p = 0.032) and strong cigarette smoke flavor intensity preference (X2 = 4.5383, 1 df, p = 0.033) in participants. Furthermore, in the in vitro cellular calcium assay, total particle matter (TPM), N-formylnornicotine and cotinine, existing in cigarette smoke, activated TAS2R38-PAV but not TAS2R38-AVI-transfected cells. Conclusion: Our data highlights that genetic variations in TAS2R38 are related to smoking behavior, especially nicotine dependence and cigarette smoke flavor intensity preference. Our findings may encourage further consideration of the taste process to identify individuals susceptible to nicotine dependence, particularly Han Chinese smokers.

The application of Large Eddy Simulation in designing the impellers of double-flow-conduits-sewage pump

QI Xue-yi,Liu Zai-lun,QI Chong,MENG Fan-zhang 한국전산유체공학회 2003 한국전산유체공학회 학술대회논문집 Vol.2003 No.10

A novel process for leaching of metals from LiNi1/3Co1/3Mn1/3O2 material of spent lithium ion batteries: Process optimization and kinetics aspects

Qi Meng,Ying-Jie Zhang,Peng Dong,Feng Liang 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-

A novel process of electrochemical cathode reduction has been developed for leaching of metals from spent LiNi1/3Co1/3Mn1/3O2 material. The leaching efficiencies of Li, Ni, Co and Mn reached to 100, 99.87, 99.58 and 99.82%, respectively with 1.5 mol/L malic acid and working voltage of 8 V at 300 r/min and 60 °C for 30 min. Kinetics analysis indicates that leaching process is controlled by surface chemical reaction. The Ea for Li, Ni, Co and Mn was 41.71, 42.83, 44.38 and 43.17 kJ/mol, respectively. Based on EIS analysis, leaching process is mainly controlled by charge transfer resistance of the surface chemical reaction.

A Study on Chinese Character Design Applied with Brand IP

Meng Qi,Ji Sun Lee 한국디자인학회 2021 한국디자인학회 학술발표대회 논문집 Vol.2021 No.11

PRECONDITIONED AOR ITERATIVE METHODS FOR SOLVING MULTI-LINEAR SYSTEMS WITH 𝓜-TENSOR

QI, MENG,SHAO, XINHUI The Korean Society for Computational and Applied M 2021 Journal of applied mathematics & informatics Vol.39 No.3

Some problems in engineering and science can be equivalently transformed into solving multi-linear systems. In this paper, we propose two preconditioned AOR iteration methods to solve multi-linear systems with -tensor. Based on these methods, the general conditions of preconditioners are given. We give the convergence theorem and comparison theorem of the two methods. The results of numerical examples show that methods we propose are more effective.

Novel efficient and environmentally friendly recovering of high performance nano-LiMnPO4/C cathode powders from spent LiMn2O4 batteries

Qi Meng,Jianguo Duan,Ying-Jie Zhang,Peng Dong 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-

In this study, a novel efficient and environmentally friendly recycling process is developed to recoverspent LiMn2O4 powder as raw materials for high-performance LiMnPO4/C nanocomposites. The processcomprises a mechanochemical liquid-phase activation of the precursor mixture followed by a single-stepsolid-state heat treatment. The results indicate that the recovered LiMnPO4/C nano-composite has apromising electrochemical performance with discharge capacities of 148.5, 136.1, and 116.5 mA h g 1 at0.05, 0.2, and 1C rate, respectively, in the voltage range of 2.5–4.5 V. A perfect cyclic performance is alsodisplayed with a capacity retention of 98% after 100 cycles at 1C rate.

전통문화 적용 캐릭터 디자인 분석 연구 -중국 신국풍 캐릭터를 중심으로-

기맹(Qi, Meng),이지선(Lee, Ji Sun) 한국디자인문화학회 2021 한국디자인문화학회지 Vol.27 No.2

오늘날 캐릭터 디자인은 젊은이들이 문화를 받아들이는 매개체로써 중요한 역할을 수행한다. 이러한 매개체 역할을 하는 중국 전통문화 요소가 활용된 디자인인 신국풍(新国风) 디자인이 주류를 형성하고 있다. 특히, 최근 인기가 있는 ‘나타(哪吒)’ 등 신국풍 캐릭터 디자인이 중국 청년층의 관심을 끌고 있다. 이에 신국풍 문화를 향유하는 중국 Z세대를 이해하고, 이들의 소비 트렌드 분석을 통하여 신국풍 디자인 특징을 분석하고자 하였다. 특히 신국풍 캐릭터 디자인에 주목하여 외재적인 조형 요소와 내재적인 교육요소로 분석을 진행하고자 하였다. 이를 바탕으로 신국풍 캐릭터 중 인기 있는 캐릭터 6종을 선정하여 캐릭터 디자인 분석을 진행하여 공통적인 특징을 도출하였다. 신국풍 캐릭터 디자인 외적인 조형 요소의 색채, 형태와 재질은 모두 전통문화 역사와 현대 트렌드 심미를 결합하였으며, 동시에 캐릭터 디자인이 지닌 성격과 가치관을 통하여 전통문화의 가치를 전달한다. 중국에서 전통문화의 가치를 재창조할 수 있는 창의적인 캐릭터 발굴이 요구되고 있는 이 시점에 본 연구가 성공적인 전통문화 활용 캐릭터 창출의 기초 자료가 될 것으로 기대한다. Nowadays, character design plays an important role as a medium for young people to accept traditional culture. The new ethnic style design, a kind of design using Chinese traditional cultural elements as the medium, is forming the mainstream. Especially, new ethnic character designs like ““Natta”, which is popular recently, has attracted the attention of Chinese young people. herefore, the Chinese Z generation enjoyed the culture of the new ethnic style and analyzed the characteristics of the new ethnic style design through the analysis of consumption trends. In particular, attention was paid to the design of new ethnic characters to derive external and intrinsic elements. Based on the derived character design elements, six popular characters are selected from the new national style characters, and character design is analyzed, and their commonness is analyzed. The color, shape and material of the external modeling elements of new ethnic style character design all reflect the combination of traditional cultural history and modern trend aesthetics, and at the same time convey the value of traditional culture through the inherent character and positive values of character design. When China also asks to explore creative characters that can re-create traditional cultural values, this research is expected to be the basic data for successfully creating much more domestic characters.