Research on Factors Influencing Chinese Consumers' Intention to Buy Agricultural Fresh Products Online - Evidence from Tangshan City

Shuang-yu Hu,Shi-yong Piao,Zhi-run Li,Yu-cong Sun,Xuan-you Jin,Jong-In Lee 한국국제농업개발학회 2020 韓國國際農業開發學會誌 Vol.32 No.4

This paper is based on field survey data and applies it to the logistic model to analyze consumers' online shopping intention to buy fresh produce. According to the total effect of online shopping intention, it was revealed that consumers' age, educational level, and monthly household income significantly influence willingness to buy fresh produce online. The product quality, price and brand name were the main factors affecting consumers' willingness to buy fresh produce online. The customer service quality, payment security, and logistics quality significantly also affected consumers' willingness to buy fresh produce online. In conclusion, it is important for vitalizing online sales of fresh produce to ensure the quality, use well-known brand name, and improve logistics service and e-commerce platforms.

A Study of the Regional Brand Recognition of Yanbian Cattle in China and the Resulting Effect on Consumers' Purchasing Intention Likelihood

Shuang-yu Hu,Shi-yong Piao,Zhi-run Li,Yu-cong Sun,Xuan-you Jin,Jong-In Lee 한국국제농업개발학회 2021 韓國國際農業開發學會誌 Vol.33 No.1

본 연구에서는 중국 길림성 연변 주 지역의 ‘연변황우’ 소비자 대상으로 설문조사를 실시하였음. 먼저 국내외 브랜드 인지 및 구매 의사에 관한 이론을 검토하고 소비자의 브랜드 인식 등의 이론을 바탕으로 연구 가설을 제시하였음. ‘연변황우’에 대한 소비자 구매 의사에 영향을 미치는 요인을 구축하여 분석을 실시하였음. 연구 결과 1. ‘연변황우’ 브랜드 이미지는 소비자의 구매 의사에 긍정적인 영향을 미치며 소비자의 ‘품질 감지’ 요인에 정(+)의 영향을 미침. 2. ‘위험 감지’ 요인에는 부(-)의 영향을 미침. ‘품질 감지’ 요인은 ‘연변황우’ 구매 의사에 긍정적인 영향을 미침. 3. ‘연변황우’의 브랜드 이미지 관리를 강화해야하며 이는 브랜드의 연구관련에 새로운 분야 탐색에 중요한 의의가 있음. This paper summarizes both domestic and foreign research theories centered around consumers' relationships to brand recognition and consumption patterns, and focuses on the results of a field survey conducted among a group of consumers in Yanbian. With the use of a variety of theories, including consumer brand equity theory, we present different research hypotheses which give insight into the different factors which affect the Yanbian Cattle's brand recognition in different regional contexts. Through empirical analysis, we measured the strength of the model which linked Yanbian Yellow Cattle's regional brand recognition with consumers' purchasing intentions. Based on the results of the study, we were able to fully analyze the future directions of the product's brand recognition, basing this analysis on a deep understanding of the regional and industrial environment of the Yanbian. With these results, we bring forward suggestions for the management of the Yanbian Yellow Cattle's regional branding strategy, and offer insights into new future research directions that would more fully support unique and effective corporate branding strategies.

An Empirical Analysis of Production Efficiency of Vegetable Industry in Hebei Province

Shuang-Yu Hu(호쌍우),Sung-Chan Kim(김성찬),Yu-Cong Sun(손우총),Zhi-Run Li(이지윤),Wen Ju(극문),Shi-Yong Piao(박세영),Jong-In Lee(이종인) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.8

중국 허베이성의 채소 산업의 발전은 이미 농민의 소득 증대를 촉진하는 중요한 경로로 되고 있으며 생태환경 오염, 자연 자원 부족 등 문제가 날로 심각해지는 상황에서 채소 산업의 고품질 발전을 실현하기 위해서는 반드시 채소산업의 생산효율을 제고함으로써 실현해야 한다. 농가의 생산성 제고를 위한 효율성 측정이 중요하다. 특히 효율성 계측시 농가의 자본투입, 토지투입 등 현실적 투입 고려가 필요하다. 본 연구는 국내외 연구 성과를 바탕으로 허베이성 2011-2018 채소 생산 투입량, 산출량 데이터, 맴퀴스트 지수와 DEA 모델을 바탕으로 허베이성 산업의 생산 효율성을 연구하였다. 효율성 계측 결과를 이용하여 비효율성의 원인을 규명하고, 농가 효율성 향상을 위한 대안을 제시한다. 분석을 통해 기술 진보 요인이 허베이성의 채소 생산능률의 증가에 영향을 미치는 중요한 원인이라는 것을 발견했다. 연구결과에 따라 본 연구는 채소 생산기술 수준을 제고하는 목적에 기초하여 허베이성 채소 생산의 구체적인 조건과 결합하여 채소 생산기술의 개발과 응용, 기계화 생산, 집약화 경영 발전 등 방면에서 상응하는 대책과 건의를 제기할 것이다. The development of the vegetable industry in Hebei province has become an important way to increase a farmer"s income. Under the background of increasingly serious problems, such as environmental pollution and the shortage of natural resources, it is necessary to improve the production efficiency of the vegetable industry to achieve high-quality development of the vegetable industry. Based on collating research results at home and abroad, this study selected the 2011-2018 vegetable production input and output data of Hebei Province. The production efficiency of Hebei Province"s industry was studied based on the Malmquist index and DEA model. The analysis showed that technological progress is an important factor in improving the vegetable production efficiency in Hebei Province. Based on the research results, the level of vegetable production technology, combined with the specific conditions of vegetable production in Hebei Province, can be improved by developing and applying vegetable production technology, mechanized production, and intensive management development.

Evaluation of Grain Production Efficiency in the Main Grain Producing Areas in China Based on a Three Stage DEA Model

Shuang-Yu Hu(호쌍우),Shi-Yong Piao(박세영),Yu-Cong Sun(손우총),Zhi-Run Li(이지윤),Sung-Chan Kim(김성찬),Jong-In Lee(이종인) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.9

식량 생산 효율성은 경제 및 자원 사회의 지속가능한 발전의 중요한 요인이며, 중국의 식량안보 및 지역 경제의 평가 척도가 된다. 경지면적이 제한되고 도시화가 급속히 진행되는 배경에서 식량 생산 효율성을 합리적으로 평가하고 식량 생산 현황을 정확히 인식하며 식량 생산 효율성을 높이는 효과적인 경로를 모색하는 것은 중요한 이론과 현실적 의미가 있다. 본 연구는 3단계 DEA 모델을 이용하여 2007년부터 2019년까지의 자료를 바탕으로 중국에 있는 식량 주요 생산지역의 생산 효율성을 분석하였다. 외부환경변수인 도시화율, 농업 보조금 및 1인당 순수익이 중국 지역의 생산 효율성에 많은 영향을 미치고 있는 것으로 분석되었다. 외부환경 및 임의오류를 제외한 후 중국 식량 주요 생산지역의 생산 효율성은 0.916에서 0.918로 증가하였고, 순수기술 효율성은 0.953에서 0.965로 증가하였으며, 규모 효율성은 0.962에서 0.952로 감소하였다. 분석결과, 중국 식량 주요 생산지역의 각 성은 생산 효율성을 개선하기 위해 각성의 특성에 적합한 생산 특정에 따라 관리수준을 제고하거나 생산규모를 확대해야 하는 것으로 분석되었다. There is a great theoretical and practical significance attached to the reasonable evaluation of the efficiency of grain production, recognition of the current situation of grain production, and exploration of effective ways to improve grain production efficiency against the background of the limited cultivable area and rapid progress of urbanization. Based on the data of 13 main grain-producing areas in China from 2007 to 2019, this study adopted the method of three-stage data envelopment analysis (DEA) to analyze agricultural production efficiency. The results revealed that exogenous environmental variables had a marked impact on grain production efficiency. The three-stage DEA model can reflect the level of food production efficiency in the main grain-producing areas more accurately, so the focus should be on formulating efficiency improvement strategies according to the local realities.

The Feasibility of Using Biomarkers Derived from Circulating Tumor DNA Sequencing as Predictive Classifiers in Patients with Small-Cell Lung Cancer

Yu Feng,Yutao Liu,Mingming Yuan,Guilan Dong,Hongxia Zhang,Tongmei Zhang,Lianpeng Chang,Xuefeng Xia,Lifeng Li,Haohua Zhu,Puyuan Xing,Hongyu Wang,Yuankai Shi,Zhijie Wang,Xingsheng Hu 대한암학회 2022 Cancer Research and Treatment Vol.54 No.3

Purpose To investigate the feasibility of biomarkers based on dynamic circulating tumor DNA (ctDNA) to classify small cell lung cancer (SCLC) into different subtypes. Materials and Methods Tumor and longitudinal plasma ctDNA samples were analyzed by next-generation sequencing of 1,021 genes. PyClone was used to infer the molecular tumor burden index (mTBI). Pre-treatment tumor tissues [T1] and serial plasma samples were collected (pre-treatment [B1], after two [B2], six [B3] cycles of chemotherapy and at progression [B4]). Results Overall concordance between T1 and B1 sequencing (n=30) was 66.5%, and 89.5% in the gene of <i>RB1</i>. A classification method was designed according to the changes of <i>RB1</i> mutation, named as subtype Ⅰ (both positive at B1 and B2), subtype Ⅱ (positive at B1 but negative at B2), and subtype Ⅲ (both negative at B1 and B2). The median progressive-free survival for subtype Ⅰ patients (4.5 months [95%CI: 2.6-5.8]) was inferior to subtype Ⅱ (not reached, p<0.0001) and subtype Ⅲ (10.8 months [95%CI: 6.0-14.4], p=0.002). The median overall survival for subtype Ⅰ patients (16.3 months [95%CI: 5.3-22.9]) was inferior to subtype Ⅱ (not reached, p=0.01) and subtype Ⅲ (not reached, p=0.02). Patients with a mTBI dropped to zero at B2 had longer median overall survival (not reached vs. 19.5 months, p=0.01). The changes of mTBI from B4 to B1 were sensitive to predict new metastases, with a sensitivity of 100% and a specificity of 85.7%. Conclusion Monitoring ctDNA based <i>RB1</i> mutation and mTBI provided a feasible tool to predict the prognosis of SCLC.

Establishment of a model to evaluate the nutritional quality of Bombyx mori Linnaeus (Lepidoptera, Bombycidae) pupae lipid based on principal components

Yu-Xiao Zou,Teng-Gen Hu,Ying Shi,Jun Liu,Li-Xia Mu,Yang Xiao,Sen-Tai Liao 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4

Silkworm pupae are a source of edible lipid with a high content of unsaturated fatty acids (UFAs) (70% of total lipid content) and are becoming a focus of pharmaceutical and dietary research in the functional oil field. To study the nutritional value of different silkworm strains, principal component analysis (PCA) was used to establish a mathematical model and cluster analysis on silkworm pupae lipid (SPL) in 90 strains based on Z-score. Single-factor correlation analysis indicated that the PUFAs content was significantly positively correlated with the α-linolenic acid (ALA) (ρ=0.98) and negatively correlated with the oleic acid (OA) (ρ=−0.73) contents, and comprehensive of principal components mathematical model (PC =0.148ZX1 +0.00 2ZX2 −0.197ZX3 −0.338ZX4 +0.220ZX5 +0.304ZX6 +0.314ZX7, ZXi is the standard score (Z-score) of X1, which was calculated as follow: ZXi = (Xi −−X )/S, where X1: palmitic acid, X2: palmitoleic acid, X3: stearic acid, X4: OA, X5: linoleic acid, X6: ALA, X7: PUFAs.−X is the arithmetic mean content of variable i, and S is the standard deviation of variable i for all samples included in the analysis.) showed the amount of ALA and PUFAs were the key factors determining the nutritional value of the pupae lipid. Cluster analysis on the composite scores calculated by the model of the principal component divided the 90 strains into three groups. A cluster of 6 strains (XHR, XIFF, ZX, YT, YO and BTN) with the best nutritional value was characterized by high contents of ALA and PUFAs and a low content of oleic acid.

Oleanolic acid induced autophagic cell death in hepatocellular carcinoma cells via PI3K/Akt/mTOR and ROS-dependent pathway

Shi, Yang,Song, Qingwei,Hu, Dianhe,Zhuang, Xiaohu,Yu, Shengcai,Teng, Dacai The Korean Society of Pharmacology 2016 The Korean Journal of Physiology & Pharmacology Vol.20 No.3

Oleanolic acid (OA) has a wide variety of bioactivities such as hepatoprotective, anti-inflammatory and anti-cancer activity and is used for medicinal purposes in many Asian countries. In the present study, the effect of OA on induction of autophagy in human hepatocellular carcinoma HepG2 and SMC7721 cells and the related mechanisms were investigated. MTT assay showed that OA significantly inhibited HepG2 and SMC7721 cells growth. OA treatment enhanced formation of autophagic vacuoles as revealed by monodansylcadaverine (MDC) staining. At the same time, increasing punctuate distribution of microtubule-associated protein 1 light chain 3 (LC3) and an increasing ratio of LC3-II to LC3-I were also triggered by OA incubation. In addition, OA-induced cell death was significantly inhibited by autophagy inhibitors 3-methyladenine (3-MA) and chloroquine (CQ) pretreatment. And we found out that OA can suppress the PI3K/Akt1/mTOR signaling pathway. Furthermore, our data suggested that OA-triggered autophagy was ROS-dependent as demonstrated by elevated cellular ROS levels by OA treatment. When ROS was cleared by N-acetylcysteine (NAC), OA-induced LC3-II convertsion and cell death were all reversed. Taken together, our results suggest that OA exerts anticancer effect via autophagic cell death in hepatocellular carcinoma.

Finite element analysis of high-density polyethylene pipe in pipe gallery of nuclear power plants

Shi, Jianfeng,Hu, Anqi,Yu, Fa,Cui, Ying,Yang, Ruobing,Zheng, Jinyang Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.3

High density polyethylene (HDPE) pipe has many advantages over metallic pipe, and has been used in non-safety related application for years in some nuclear power plants (NPPs). Recently, HDPE pipe was introduced into safety related applications. The main difference between safety-related and non-safety-related pipes in NPPs is the design method of extra loadings such as gravity, temperature, and earthquake. In this paper, the mechanical behavior of HDPE pipe under various loads in pipe gallery was studied by finite element analysis (FEA). Stress concentrations were found at the fusion regions on inner surface of mitered elbows of HDPE pipe system. The effects of various factors were analyzed, and the influence of various loads on the damage of HDPE pipe system were evaluated. The results of this paper provide a reference for the design of nuclear safety-related Class 3 HDPE pipe. In addition, as the HDPE pipes analyzed in this paper were suspended in pipe gallery, it can also serve as a supplementary reference for current ASME standard on Class 3 HDPE pipe, which only covers the application for buried pipe application.

Immunogenicity of recombinant Lactobacillus plantarum NC8 expressing goose parvovirus VP2 gene in BALB/c mice

Yu-Ying Liu,Wentao Yang,Shaohua Shi,Ya-Jie Li,Liang Zhao,Chunwei Shi,Fangyu Zhou,Yanlong Jiang,Jingtao Hu,Wei Gu,Gui-Lian Yang,Chun-feng Wang 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.2

Goose parvovirus (GPV) continues to be a threat to goose farms and has significant economic effects on the production of geese. Current commercially available vaccines only rarely prevent GPV infection. In our study, Lactobacillus (L.) plantarum NC8 was selected as a vector to express the VP2 gene of GPV, and recombinant L. plantarum pSIP409-VP2/NC8 was successfully constructed. The molecular weight of the expressed recombinant protein was approximately 70 kDa. Mice were immunized with a 2 × 109 colony-forming unit/200 mL dose of the recombinant L. plantarum strain, and the ratios and numbers of CD11c+, CD3+CD4+, CD3+CD8+, and interferon gamma- and tumor necrosis factor alpha-expressing spleen lymphocytes in the pSIP409-VP2/NC8 group were higher than those in the control groups. In addition, we assessed the capacity of L. plantarum SIP409-VP2/NC8 to induce secretory IgA production. We conclude that administered pSIP409-VP2/NC8 leads to relatively extensive cellular responses. This study provides information on GPV infection and offers a clear framework of options available for GPV control strategies.

Overexpression of Cyclooxygenase-1 Correlates with Poor Prognosis in Renal Cell Carcinoma

Yu, Zu-Hu,Zhang, Qiang,Wang, Ya-Dong,Chen, Jing,Jiang, Zhi-Mao,Shi, Min,Guo, Xin,Qin, Jie,Cui, Guang-Hui,Cai, Zhi-Ming,Gui, Yao-Ting,Lai, Yong-Qing Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6

The aim of this study was to evaluate expression of COX-1 in renal cell carcinoma (RCC) and its prognostic value. mRNA of COX-1 was detected in 42 paired RCC and adjacent normal tissues with quantitative realtime polymerase chain reaction (qRT-PCR). Expression of COX-1 was also evaluated in 196 RCC sections and 91 adjacent normal tissues with immunohistochemistry. Statistical analysis was performed to assess COX-1 expression in RCC and its prognostic significance. The results of qRT-PCR showed mRNA levels of COX-1 in RCC tissues to be significantly higher than that in adjacent normal tissues (p < 0.001). Immunohistochemical assays also revealed COX-1 to be overexpressed in RCC tissues (p < 0.001). Statistical analysis demonstrated high expression of COX-1 was correlated with tumour size (p = 0.002), pathological stage (p = 0.003), TNM stage (p = 0.003, 0.007, 0.027, respectively), and tumour recurrence (p < 0.001). Survival analysis indicated patients with high expression of COX-1 had shorter survival time (p < 0.001), and COX-1 was an independent predictor. This is the first study to reveal overexpression of COX-1 in RRC and point to use as a prognostic marker in affected patients.