Effects of prolonged photoperiod on growth performance, serum lipids and meat quality of Jinjiang cattle in winter

Yu, Yan,Qiu, Jingyun,Cao, Jincheng,Guo, Yingying,Bai, Hui,Wei, Shengjuan,Yan, Peishi Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.9

Objective: This study was conducted to investigate the potential effects of prolonged photoperiod on the serum lipids, carcass traits, and meat quality of Jinjiang cattle during winter. Methods: Thirty-four Jinjiang bulls aged between 14 and 16 months were randomly assigned to two groups that were alternatively subjected to either natural daylight +4 h supplemental light (long photoperiod, LP) or natural daylight (natural photoperiod, NP) for 96 days. The potential effects on the levels of serum lipids, carcass traits, meat quality, and genes regulating lipid metabolism in the intramuscular fat (IMF) of the cattle were evaluated. Results: Jinjiang cattle kept under LP showed significant increase in both dry matter intake and backfat thickness. the serum glucose and the plasma leptin levels were significantly reduced, while that of melatonin and insulin were observed to be increased. The crude fat contents of biceps femoris muscle and longissimus dorsi muscle were higher in LP than in NP group. In longissimus dorsi muscle, the proportions of C17:0 and C18:0 were significantly higher but that of the C16:1 was found to be significantly lower in LP group. The relative mRNA expressions in IMF of longissimus dorsi muscle, the lipid synthesis genes (proliferator-activated receptor gamma, fatty acid-binding protein) and the fatty acid synthesis genes (acetyl-coa carboxylase, fatty acid synthetase, 1-acylglycerol-3-phosphate acyltransferase) were significantly up-regulated in LP group (p<0.05); whereas the hormone-sensitive lipase and stearoyl-CoA desaturase 1 were significantly down-regulated in LP than in NP group. Conclusion: Prolonged photoperiod significantly altered the growth performance, hormonal levels, gene expression and fat deposition in Jinjiang cattle. It suggested that the LP improved the fat deposition by regulating the levels of different hormones and genes related to lipid metabolism, thereby improving the fattening of Jinjiang cattle during winter.

Design, calibration and application of wireless sensors for structural global and local monitoring of civil infrastructures

Yu, Yan,Ou, Jinping,Li, Hui Techno-Press 2010 Smart Structures and Systems, An International Jou Vol.6 No.5

Structural Health Monitoring (SHM) gradually becomes a technique for ensuring the health and safety of civil infrastructures and is also an important approach for the research of the damage accumulation and disaster evolving characteristics of civil infrastructures. It is attracting prodigious research interests and the active development interests of scientists and engineers because a great number of civil infrastructures are planned and built every year in mainland China. In a SHM system the sheer number of accompanying wires, fiber optic cables, and other physical transmission medium is usually prohibitive, particularly for such structures as offshore platforms and long-span structures. Fortunately, with recent advances in technologies in sensing, wireless communication, and micro electro mechanical systems (MEMS), wireless sensor technique has been developing rapidly and is being used gradually in the SHM of civil engineering structures. In this paper, some recent advances in the research, development, and implementation of wireless sensors for the SHM of civil infrastructures in mainland China, especially in Dalian University of Technology (DUT) and Harbin Institute of Technology (HIT), are introduced. Firstly, a kind of wireless digital acceleration sensors for structural global monitoring is designed and validated in an offshore structure model. Secondly, wireless inclination sensor systems based on Frequency-hopping techniques are developed and applied successfully to swing monitoring of large-scale hook structures. Thirdly, wireless acquisition systems integrating with different sensing materials, such as Polyvinylidene Fluoride(PVDF), strain gauge, piezoresistive stress/strain sensors fabricated by using the nickel powder-filled cement-based composite, are proposed for structural local monitoring, and validating the characteristics of the above materials. Finally, solutions to the key problem of finite energy for wireless sensors networks are discussed, with future works also being introduced, for example, the wireless sensor networks powered by corrosion signal for corrosion monitoring and rapid diagnosis for large structures.

In vitro regeneration of Phaseolus vulgaris L. via direct and indirect organogenesis

Yu Yan,Liu Dajun,Liu Chang,Yan Zhishan,Yang Xiaoxu,Feng Guojun 한국식물생명공학회 2021 Plant biotechnology reports Vol.15 No.3

A stable and efcient regeneration system is a necessary condition for the genetic transformation of Phaseolus vulgaris L. In this study, cotyledonary nodes with one cotyledon, cotyledonary nodes with two cotyledons, embryonic axes and root segments of 5-day-old germinated seeds were used as explants to evaluate explants to induce shoots and calli. Besides, using cotyledonary nodes with one cotyledon as explants, the efects of diferent concentrations of auxins and cytokinins on the direct and indirect organogenesis of common bean were investigated. As a result, embryonic axes and cotyledonary nodes with two cotyledons were the most efective explant types for the formation of shoots and calli. The cotyledonary nodes with one cotyledon were cultured in the shoot induction medium containing 7 mg L−1 6-benzyladenine (BAP) and 0.2 mg L−1 α-naphthaleneacetic acid (NAA). 74.21% of explants directly formed shoots and average number of shoots was up to 2.91. On the rooting medium supplemented with 0.5 mg L−1 indole-3-butyric acid (IBA), the rooting rate of shoots reached 100% and the number of main roots formed was the most. The addition of 0.5 mg L−1 thidiazuron (TDZ) was optimum for callus induction, and the induction rate could reach 91.51%. The shoot regeneration frequency was 93.33% when calli subcultured on the shoot induction medium supplemented with 1.0 mg L−1 BAP. Average 4.27 shoots were produced by per callus and rooted on the shoot induction medium. This report descripts an efcient common bean regeneration system through direct and indirect organogenesis, which can provide reference for its subsequent genetic transformation research.

Mass production and application of natural enemy insects in China

Yuyan Li,Zhongjian Shen,Jianjun Mao,Mengqing Wang,Lisheng Zhang 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10

Natural enemy insects, including predators and parasitoids, are beneficial organisms that feed upon other agricultural pests. Using natural enemy insects to suppress or prevent outbreak of pests is a key component of integrated pest management strategy. It is safe, effective, and environmentally friendly and can be applied easily to the greenhouses, filed crops and orchards. Rearing and application of natural enemy insects in biocontrol in China have a long history. As early as 1700 years ago, the predator Oecophylla smaragdina has been used for controlling many kinds of citrus pests. Up to now, more than 30 species of natural enemies that can be artificially mass produced and widely used for biological control of many kinds of pests, including caterpillars, aphids, whiteflies, thrips, leaf mites and scales in China. The annual average application area of natural enemies is over 11.34 million hectares. However, with the increasing demand of using natural enemies in biological control programs, the development of natural enemy insect industrialization still face many challenges. It is urgent to explore more effective candidate natural enemies, improve the production efficiency, increase the shelf life of products and enhance the colonization of natural enemy insects after release, and thus facilitate the commercially production and application of natural enemies. This is of great significance for comprehensively promoting the use of green prevention and control techniques for crop diseases and pests, reducing the use of chemical pesticides, ensuing the quality and safety of food and agricultural products, and ultimately promoting sustainable agricultural development.

Research on China's Steel Demand Using Combined Forecast

Yuyan Weng,Li Zhou,Sheng Zhou,Tianyu Qi 보안공학연구지원센터(IJUNESST) 2015 International Journal of u- and e- Service, Scienc Vol.8 No.1

This research conducts an error analysis between the forecasting value and the actual value of steel demand of 2010 in China, which is based on the analysis of forecasting methods and their results of Chinese steel demand in the existing studies, and then forecasts China’s steel demand in 2015 by making use of a combined forecasting method. The combined forecasting method includes two stages. In the first stage, with reference to actual steel demand of China in 2010, a threshold is set and some forecasting results are selected according to the error between the forecasting value and actual value of steel demand of each method. In the second stage, weights of corresponding selected methods are determined which are based on the error. And the final demand of China’s steel in 2015 is forecasted through the combined forecasting method.

Hsa_Circ_0001947/MiR-661/DOK7 Axis Restrains Non-Small Cell Lung Cancer Development

( Yuyan Bao ),( Yanjie Yu ),( Bing Hong ),( Zhenjian Lin ),( Guoli Qi ),( Jie Zhou ),( Kaiping Liu ),( Xiaomin Zhang ) 한국미생물 · 생명공학회 2021 Journal of microbiology and biotechnology Vol.31 No.11

Hsa_circ_0001947 is associated with multiple cancers, but its function in non-small cell lung cancer (NSCLC) is ambiguous and needs further research. The targeting relationship among circ_0001947, miR-661, and downstream of tyrosine kinase 7 (DOK7) was predicted by database and further verified by dual-luciferase reporter assay, while their expressions in cancer tissues and cells were detected by quantitative real-time polymerase chain reaction (qRT-PCR). After transfection, cell biological behaviors and expressions of miRNAs, miR-661 and DOK7 were determined by cell function experiments and qRT-PCR, respectively. Circ_0001947 was low-expressed in NSCLC tissues and cells. Circ_0001947 knockdown intensified cell viability and proliferation, induced cell cycle arrest at S phase, suppressed apoptosis and evidently enhanced miR-510, miR-587, miR-661 and miR-942 levels, while circ_0001947 overexpression did the opposite. MiR-661 was a target gene of circ_0001947 that participated in the regulation of circ_0001947 on cell biological behaviors. Furthermore, DOK7, the target gene of miR-661, partly participated in the regulation of miR-661 on cell viability. Hsa_circ_0001947 acts as a sponge of miR-661 to repress NSCLC development by elevating the expression of DOK7.

A Novel Transfer Learning-Based Algorithm for Detecting Violence Images

Yuyan Meng,Deyu Yuan,Shaofan Su,Yang Ming 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.6

Violence in the Internet era poses a new challenge to the current counter-riot work, and according to research and analysis, most of the violent incidents occurring are related to the dissemination of violence images. The use of the popular deep learning neural network to automatically analyze the massive amount of images on the Internet has become one of the important tools in the current counter-violence work. This paper focuses on the use of transfer learning techniques and the introduction of an attention mechanism to the residual network (ResNet) model for the classification and identification of violence images. Firstly, the feature elements of the violence images are identified and a targeted dataset is constructed; secondly, due to the small number of positive samples of violence images, pre-training and attention mechanisms are introduced to suggest improvements to the traditional residual network; finally, the improved model is trained and tested on the constructed dedicated dataset. The research results show that the improved network model can quickly and accurately identify violence images with an average accuracy rate of 92.20%, thus effectively reducing the cost of manual identification and providing decision support for combating rebel organization activities.

Influence of Work Passion on Unethical Pro-Organizational Behavior: Dual Mediating Effect of Organizational Identification and Organizational Commitment

Yuyan Zhou,Soo-Jin Chung 한국무역연구원 2021 무역연구 Vol.17 No.5

Purpose - Based on the social exchange theory, social identity theory and self-determination theory, this paper explores the relationship between work passion and unethical pro-organizational behavior (UPB) and analyzes the dual mediating effect of organizational identification and organizational commitment. Design/Methodology/Approach - Based on theoretical research, five key research hypotheses are proposed, and a research model is established. The data source is a questionnaire survey involving 613 employees from Chinese retail enterprises. In addition, SPSS & AMOS programs were used to test the hypotheses of the research model. Findings - First, work passion can activate employees’mediating role in the relationship between work passion and unethical pro-organizational behavior. Third, organizational commitment plays a mediating role in the relationship between work passion and unethical pro-organizational behavior. Fourth, organizational identification and organizational commitment have a dual mediating effect in the influence of work passion on unethical pro-organizational behavior. Research Implications - This paper has implications for appropriate measures that managers can take to effectively manage employees’ unethical pro-organizational behavior and actively guide work passion.

교통혼잡을 고려한 다년도 대규모 시설위치 및 교통인프라 확장 통합 모형 개발

YIN YUYAN,강승모 한국ITS학회 2017 한국ITS학회 학술대회 Vol.2017 No.10

중국 초등학생이 지각한 교사-학생 관계와 교사의 사회적 지지가 사회정서역량에 미치는 영향 : 소수민족 여부에 따른 다집단 분석

Li Yuyan,신태섭 인하대학교 다문화융합연구소 2021 문화교류와 다문화교육 Vol.10 No.5