• 제목/요약/키워드: Science and Technology University

검색결과 76,446건 처리시간 0.101초

Profiling of skeletal muscle tissue for long non-coding RNAs related to muscle metabolism in the QingYu pig at the growth inflection point

  • Luo, Jia;Shen, Linyuan;Gan, Mailin;Jiang, Anan;Chen, Lei;Ma, Jideng;Jin, Long;Liu, Yihui;Tang, Guoqing;Jiang, Yanzhi;Li, Mingzhou;Li, Xuewei;Zhang, Shunhua;Zhu, Li
    • Animal Bioscience
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    • 제34권8호
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    • pp.1309-1320
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    • 2021
  • Objective: Investigation of muscle growth at different developmental stages is an appropriate strategy for studying the mechanisms underlying muscle development and differences in phenotypes. In particular, the muscle development mechanisms and the difference between the fastest and slowest growth rates. Methods: In this study, we used a growth curve model to fit the growth inflection point (IP) of QingYu pigs and compared differences in the long non-coding RNA (lncRNA) transcriptome of muscle both at the growth IP and plateau phase (PP). Results: The growth curve of the QingYu pig had a good fit (R2 = 0.974) relative to a typical S-curve and reached the IP at day 177.96. At the PP, marbling, intramuscular fat, and monounsaturated fatty acids had increased significantly and the percentage of lean muscle and polyunsaturated fatty acids had decreased. A total of 1,199 mRNAs and 62 lncRNAs were differentially expressed at the IP compared with the PP. Additional to gene ontology and Kyoto encyclopedia of genes and genomes pathway analyses, these differentially expressed protein coding genes were principally related to muscle growth and lipid metabolism. Conclusion: Our results suggest that the identified differentially expressed lncRNAs, could play roles in muscle growth, fat deposition and regulation of fatty acid composition at the IP and PP.

Isolation and Characterization of Antioxidative Compounds from the Aerial Parts of Angelica keiskei

  • Kim, So-Joong;Cho, Jeong-Yong;Wee, Ji-Hyang;Jang, Mi-Young;Kim, Cheol;Rim, Yo-Sup;Shin, Soo-Cheol;Ma, Seung-Jin;Moon, Jae-Hak;Park, Keun-Hyung
    • Food Science and Biotechnology
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    • 제14권1호
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    • pp.58-63
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    • 2005
  • Ethyl acetate-soluble neutral fraction of hot water extracts from the aerial parts of Angelica keiskei showed a 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity. Six antioxidative compounds were purified and isolated by various chromatographic procedures. Based on the analyses of FAB-MS and NMR, the isolated compounds were structurally elucidated as luteolin 7-O-${\beta}$-D-glucopyranoside (1), quercetin 3-O-${\beta}$-D-galactopyranoside (2), quercetin 3-O-${\beta}$-D-glucopyranoside (3), quercetin 3-O-${\alpha}$-D-arabinopyranoside (4), kaempferol 3-O-${\alpha}$-D-arabinopyranoside (5), and luteolin 7-O-rutinoside (6). The glycosides of flavonols and luteolin showed DPPH radical-scavenging activity. One molecule of 2, 3, 4, 6, 1, and 5 scavenged 4.2, 4.2, 4.1, 2.5, 2.2, and 1.4 molecules of DPPH radical, respectively.

Security Risk Assessment in Conducting Online Exam

  • Danah AlDossary;Danah AlQuaamiz;Fai AlSadlan;Dana AlSharari;Lujain AlOthman;Raghad AlThukair;Ezaz Aldahasi
    • International Journal of Computer Science & Network Security
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    • 제23권6호
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    • pp.77-83
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    • 2023
  • This research is conducted to minimize the potential security risks of conducting online exams to an acceptable level as vulnerabilities and threats to this type of exam are presented. This paper provides a general structure for the risk management process and some recommendations for increasing the level of security.

Hydrogen Passivation for the Enhancement of Poly-Si Performance Crystallized By Double-Frequency YAG Laser

  • Li, Juan;Chong, Luo;Ying, Yao;He, Li;Meng, Zhiguo;Chunya, Wu;Xiong, Shaozhen;Kwok, Hoi-Sing
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1608-1611
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    • 2009
  • Here the hydrogen passivation treatment has been adopted to enhance the performance of poly-Si crystallized by YAG laser annealing (LA poly-Si). We have investigated the effects of passivation time, passivation power and passivation temperature on the hall mobility of the LA poly-Si and analyzed the mechanism of the hydrogen passivation preliminary. It has been found that the quality of the poly-Si annealed by YAG laser could be improved after proper hydrogen plasma treatment.

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Genetic Differentiation among Sheep Populations from Near-sea Mainland in East Asia

  • Lu, S.X.;Chang, H.;Du, L.;Tsunoda, K.;Ji, D.J.;Sun, W.;Yang, Z.P.;Chang, G.B.;Mao, Y.J.;Wang, Q.H.;Xu, M.
    • Asian-Australasian Journal of Animal Sciences
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    • 제17권10호
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    • pp.1360-1365
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    • 2004
  • Using the method of 'random sampling in typical colonies of the central area of the habitat', 60 Small-tailed Han sheep were obtained in Jining city, Shangdong province. The variations of Small-tailed Han sheep at 12 structural loci encoding blood proteins were detected by several electrophoresis techniques and their gene frequencies were then estimated. The same data of four other sheep populations from Near-sea Mainland in East Asia were cited for the analysis of genetic differentiation. The average heterozygosities of five populations, namely Kharkhorin sheep, Ulaanbaatar sheep, Small-tailed Han sheep, Hu sheep and Cham Tribe sheep were 0.3447, 0.3285, 0.3157, 0.3884 and 0.2300, respectively. The coefficient of gene differentiation among four populations, Kharkhorin sheep, Ulaanbaatar sheep, Small-tailed Han sheep and Hu sheep, was 0.045557, and that between these four breeds and Cham Tribe sheep was 0.088005, indicating that the level of gene differentiation among the former four sheep populations of Mongolian group was comparatively lower than that between Cham Tribe sheep and other four sheep populations. The origin of Cham Tribe sheep deserve further research. The documentary research on the evolution of Small-tailed Han sheep and Hu sheep from Mongolian sheep was further verified by the biochemical experiments in the study. It was reasonably deduced that Hu sheep, Small Tailed Han sheep and Cham Tribe sheep were decreasingly influenced by the bloodline of Mongolian sheep.