Study on the Thermal Decomposition of Waste Polystyrene in Motor Oil Using Microwave Energy

Liu, Xiao Yun,Kang, Tae Won 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-

A novel microwave-induced pyrolysis of waste polystyrene in motor oil was performed in quartz tube reactor. Different pyrolysis conditions were investigated, such as time range from 30 minutes to 1 hour and effective microwave power range from 180 to 250 watt. The distillate components were analyzed with GC-MS, and styrene, 1-methyl styrene, toluene, ethyl benzene were the four main products. Among these distillate products, styrene took over 70 percentages. Temperature of pyrolysis suing microwave was much lower than that of conventional thermal pyrolysis method.

The Molecular Mechanism of Safrole-induced DNA Adducts and its Role to Oral Carcinogenesis

Liu,Tsung-Yun 한국환경성돌연변이발암원학회 2003 한국환경성돌연변이·발암원학회지 Vol.23 No.3

基於CiteSpace視角的漢語四字格成語 曆時研究可視化圖譜分析及研究展望 ― 以1979年-2021年爲中心

劉柳(Liu Liu),劉耘(Liu Yun) 중국어문학연구회 2022 중국어문학논집 Vol.- No.134

The idiom, which is short but powerful, is a set phrase accepted through common practices for a long period of time. The idiom has various forms, and are mainly of four-character structure. Aiming at important issues about the diachronic situation, current hot spots and future trend of four-character idiom research, etc., this paper sorts out the relevant literature published in CNKI from 1979 to 2021, and utilizes CiteSpace to develop the author collaboration network, research institution cooperation network, keyword co-appearance network, clustering map and other visualized knowledge maps in respect to diachronic research situation of four-character idioms. Then, those visualized knowledge maps are quantitatively analyzed to obtain their development trend that rises steadily as a whole. After analysis of current research hot spots, it’s found that the academic circles are currently focusing on researches about ontology and translation of the Chinese. Based on the analysis results, this paper makes a scientific prediction for future idiom development, and deduces that the idioms will evolve towards the direction of construction grammar, cognitive science, etc., in the future.

Non-Organ Specific Cancer Preventive Effect of Long-Term Administration of Korean Red Ginseng Extracts on the Incidence of Malignant Neoplasms

Taik-Koo Yun(윤택구),Shu Zheng,Soo-Yong Choi,Shan Rong Cai,Yun-Sil Lee,Xi Yong Liu,Kyung Ja Cho,Kun Young Park,Hyo Young Yun,Ji Young Yun 고려인삼학회 2009 고려인삼학회 학술대회 Vol.2009 No.5

Causes, Features, and Outcomes of Drug-Induced Liver Injury in 69 Children from China

( Yun Zhu ),( Yong Gang Li ),( Jia Bo Wang ),( Shu Hong Liu ),( Li Fu Wang ),( Yan Ling Zhao ),( Yun Feng Bai ),( Zhong Xia Wang ),( Jian Yu Li ),( Xiao He Xiao ) 대한소화기학회 2015 Gut and Liver Vol.9 No.4

Background/Aims: Drug-induced liver injury (DILI) is a frequent cause of pediatric liver disease; however, the data on DILI are remarkably limited. Methods: All 69 children hospitalized with DILI between January 2009 and December 2011 were retrospectively studied. Results: A total of 37.7% of the children had medical histories of respiratory infection. The clinical injury patterns were as follows: hepatocellular 89.9%, cholestatic 2.9%, and mixed 7.2%. Liver biopsies from 55 children most frequently demonstrated chronic (47.3%) and acute (27.3%) hepatitis. Hypersensitivity features, namely, fever (31.9%), rash (21.7%), and eosinophilia (1.4%), were found. Twenty-four children (34.8%) developed chronic DILI. Antibiotics (26.1%) were the most common Western medicines (WMs) causing DILI, and the major implicated herbs were Ephedra sinica and Polygonum multiflorum. Compared with WM, the children whose injuries were caused by Chinese herbal medicine (CHM) showed a higher level of total bilirubin (1.4 mg/dL vs 16.6 mg/dL, p=0.004) and a longer prothrombin time (11.8 seconds vs 17.3 seconds, p=0.012), but they exhibited less chronic DILI (2/15 vs 18/39, p=0.031). Conclusions: Most cases of DILI in children are caused by antibiotics or CHM used to treat respiratory infection and present with hepatocellular injury. Compared with WM, CHM is more likely to cause severe liver injury, but liver injury caused by CHM is curable. (Gut Liver 2015;9:525-533)

MicroRNA Expression Profile Analysis Reveals Diagnostic Biomarker for Human Prostate Cancer

Liu, Dong-Fu,Wu, Ji-Tao,Wang, Jian-Ming,Liu, Qing-Zuo,Gao, Zhen-Li,Liu, Yun-Xiang Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7

Prostate cancer is a highly prevalent disease in older men of the western world. MicroRNAs (miRNAs) are small RNA molecules that regulate gene expression via posttranscriptional inhibition of protein synthesis. To identify the diagnostic potential of miRNAs in prostate cancer, we downloaded the miRNA expression profile of prostate cancer from the GEO database and analysed the differentially expressed miRNAs (DE-miRNAs) in prostate cancerous tissue compared to non-cancerous tissue. Then, the targets of these DE-miRNAs were extracted from the database and mapped to the STRING and KEGG databases for network construction and pathway enrichment analysis. We identified a total of 16 miRNAs that showed a significant differential expression in cancer samples. A total of 9 target genes corresponding to 3 DE-miRNAs were obtained. After network and pathway enrichment analysis, we finally demonstrated that miR-20 appears to play an important role in the regulation of prostate cancer onset. MiR-20 as single biomarker or in combination could be useful in the diagnosis of prostate cancer. We anticipate our study could provide the groundwork for further experiments.

Analysis of Key Genes and Pathways Associated with Colorectal Cancer with Microarray Technology

Liu, Yan-Jun,Zhang, Shu,Hou, Kang,Li, Yun-Tao,Liu, Zhan,Ren, Hai-Liang,Luo, Dan,Li, Shi-Hong Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3

Objective: Microarray data were analyzed to explore key genes and their functions in progression of colorectal cancer (CRC). Methods: Two microarray data sets were downloaded from Gene Expression Omnibus (GEO) database and differentially expressed genes (DEGs) were identified using corresponding packages of R. Functional enrichment analysis was performed with DAVID tools to uncover their biological functions. Results: 631 and 590 DEGs were obtained from the two data sets, respectively. A total of 32 common DEGs were then screened out with the rank product method. The significantly enriched GO terms included inflammatory response, response to wounding and response to drugs. Two interleukin-related domains were revealed in the domain analysis. KEGG pathway enrichment analysis showed that the PPAR signaling pathway and the renin-angiotensin system were enriched in the DEGs. Conclusions: Our study to systemically characterize gene expression changes in CRC with microarray technology revealed changes in a range of key genes, pathways and function modules. Their utility in diagnosis and treatment now require exploration.

融通和會 自得於心

Liu Yun chao(劉云超) 대한철학회 2015 哲學硏究 Vol.136 No.-

왕신자(王申子)는 송(宋)나라 말기에서 원(元)나라 중후기까지 살았던 역학자(易學者)이다. 매우 혼란한 시대를 살았던 그는 일생동안 은거생활을 하며 지냈기 때문에 세상에 이름이 잘 알려지지 않았다. 그러나 그는 역학을 연구하는 방면에서 매우 큰 업적을 남겼으며, 그가 쓴《대역집설(大易緝說)》,《춘추류전(春秋類傳)》두 권의 책 중에서 지금까지 남아있는《대역집설》은 송원시기의 학술사상을 이해하는데 소홀히 할 수 없는 매우 중요한 자료이다. 왕신자의 사상에서 드러나는 중요한 특징은 포용성과 비판성이다. 그는 당시의 주류 학술사상뿐만 아니라 모든 학파의 사상을 비판적으로 계승하고 창조적으로 발전시켜 자신의 독특한 역학체계를 형성했다. 그의 이기(理氣)관은 대체적으로 유가와 도가사상을 융합하고 주자학과 육왕학을 아우르는 송·원시기의 학술추세를 드러낸다. 그러나 그는 언제나 일반적인 학술적 관행을 따르지 않고 자신이 공부해서 체득한 독창적인 견해를 제기했다. 어떤 때에는 당시 매우 권위 있는 관점에 대해서도 그대로 받아들이지 않고 자신의 관점으로 이해하고 해석했다. 그는 한편으로 자각적으로 정주이학을 계승했으며, 다른 한편으로 장재(張載)의 기철학을 받아들여 '기(氣)'가 역학사상의 중요한 범주가 되도록 했다. 뿐만 아니라 "무극이 태극이다(無極而太極)."라는 의미를 "무에서 유가 나타난다(無生有)."라는 의미로 이해하고, '태극(太極)'을 '이기합일(理氣合一)'로 이해했으며, 이로 인해 '태극'이 '도(道)'와 '기(器)', '무(無)'와 '유(有)'를 이어주는 연결고리가 되도록 했다. 모든 학파의 관점을 분석하고 헤아려 서로간의 절충과 조화를 시도한 왕신자의 역학사상은 이론적인 방면에서 매우 독창적인 특징을 지닌다고 볼 수 있다. Wang Shenzi(王申子) is a Yi-ology(易学) scholar who lived in the last year of the Song dynasty. His idea of Li-Qi(理气) is special. First of all, You may find a typical type of fusion from Wang's description. For instance, fusion of Confucianism and Daoism, fusion of Zhu-xi(朱熹)and Lu jiu-yuan(陆九渊), fusion of Qi(元氣) and Idea(理). Wang's theory shows us a characteristic of coordination and fusion. Secondly, on account of the independence study feature in Shu(蜀), Wang shen-zi often breaks the routine and makes some of his own points. When Wang talks about the concept "Non Ultimate then Grand Ultimate"(無極而太極), he explains it as "Existing comes from Non-existing"(無生有), the latter being a Daoism proposition. At the same time, Grand Ultimate(太極) is the mixture of Idea and Qi in his theory, and can be interpreted by either Non-existing and Existing viewpoints. This is Wang's original creation.

A Weibo Topic Tracking System based on K-means

Yun Liu,Kun-Peng Xia,Jian-Xun Zhao 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.6

This article studied weibo text representation. For the weibo features such as short, real-time, colloquialism and originality, in the original vector space model, we propose a suitable method for weibo text representation. Make all the content words as feature words after participation. And we proposed T-TFIDF weight calculation method according to the features of weibo. According to the vector space model, we proposed a weibo adaptive topic tracking methods based on K-means clustering. Simulation analysis shows that, the method can by comparing the similarity micro-blog and sub topic vector set, determine whether weibo belonging to the topic.

Demethylation of CpG islands in the 5` upstream regions mediates the expression of the human testis-specific gene MAGEB16 and its mouse homolog Mageb16

( Yun Qiang Liu ),( Mei Ling Wang ),( Si Yuan Jiang ),( Yong Jie Lu ),( Da Chang Tao ),( Yuan Yang ),( Yong Xin Ma ),( Si Zhong Zhang ) 생화학분자생물학회 2014 BMB Reports Vol.47 No.2

Tissue-specific gene expression is regulated by epigenetic modification involving trans-acting factors. Here, we identified that the human MAGEB16 gene and its mouse homolog, Mageb16, are only expressed in the testis. To investigate the mechanism governing their expression, the promoter methy-lation status of these genes was examined in different samples. Two CpG islands (CGIs) in the 5` upstream region of MAGEB16 were highly demethylated in human testes, whereas they were methylated in cells without MAGEB16 expression. Similarly, the CGI in Mageb16 was hypomethylated in mouse testes but hypermethylated in other tissues and cells without Mageb16 expression. Additionally, the expression of these genes could be activated by treatment with the demethylation agent 5`-aza-2`- deoxycytidine (5`-aza-CdR). Luciferase assays revealed that both gene promoter activities were inhibited by methylation of the CGI regions. Therefore, we propose that the testis-specific expression of MAGEB16 and Mageb16 is regulated by the methylation status of their promoter regions. [BMB Reports 2014; 47(2): 86-91]