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Zhi-lin Yuan,Zhen-zhu Su,Li-juan Mao,Yang-qing Peng,Guan-mei Yang,Fu-cheng Lin,Chu-long Zhang 한국미생물학회 2011 The journal of microbiology Vol.49 No.1
Ecological niches in the rhizosphere and phyllosphere of grasses capable of sustaining endophytes have been extensively studied. In contrast, little information regarding the identity and functions of endophytic fungi in stems is available. In this study, we investigated the taxonomic affinities, diversity, and host specificities of culturable endophytes in stems of wild rice (Oryza granulata) in China. Seventy-four isolates were recovered. Low recovery rate (11.7%) indicated that there were relatively few sites for fungal infection. Identification using morphology, morphospecies sorting, and molecular techniques resulted in classification into 50 taxa, 36 of which were recovered only once. Nucleotide sequence similarity analysis indicated that 30% of the total taxa recovered were highly divergent from known species and thus may represent lineages new to science. Most of the taxa were classified as members of the classes Sordariomycetes or Dothideomycetes (mainly in Pleosporales). The presence of Arthrinium and Magnaporthaceae species, most often associated with poaceous plants, suggested a degree of host specificity. A polyphasic approach was employed to identify two Muscodor taxa based on (i) ITS and RPB2 phylogenies, (ii) volatile compounds produced, and (iii)an in vitro bioassay of antifungal activity. This to our knowledge is only the second report regarding the isolation of Muscodor spp. in China. Therefore, we hypothesize that wild plants represent a huge reservoir of unknown fungi. The prevalence, novelty, and species-specificity of unique isolates necessitate a reevaluation of their contribution to ecosystem function and fungal biodiversity.
Zhi-Fang Lin,Nan Liu,Gui-Zhu Lin,Chang-Lian Peng 한국식물학회 2009 Journal of Plant Biology Vol.52 No.4
Leaf discs of Alocasia macrorrhiza were treated with various stress factors, including two photo-oxidants, methyl viologen (MV) or riboflavin (RB); three pollutants, sodium bisulphite (NaHSO3), or the heavy metals lead or cadmium; or an osmotic medium, polyethylene glycol 6000. The in situ localisation sites for O2 − generation were identified using specific dye nitro blue tetrazolium as a probe. The level of superoxide production was determined by scanning the blue-stained formazan area and was defined as the percentage of pixels from the stained portion versus the total number of pixels in the entire leaf disc area. All stress factors induced the generation of O2 − in a time- or concentration-dependent pattern. Although superoxide production also was enhanced by longer time periods in untreated discs (control), the degree to which this occurred was less than that measured in leaves treated with either MV or RB. Generation sites were primarily found in the chloroplasts of stomatal guard cells and in the plasma membrane of the epidermis and mesophyll cells, indicating that they were most responsive to stress conditions. Nevertheless, the site of O2 − generation varied among these stress factors.
모바일 미디어 환경에서 공중플랫폼의 수용자 지속사용의도에 관한 연구
Peng, Zhi Lin,윤민석(Min-Suk YOON) 한국IT서비스학회 2020 한국IT서비스학회 학술대회 논문집 Vol.2020 No.1
모바일 인터넷이 급속하게 발전함에 따라서 모바일 디바이스를 중심으로 정보를 전파하고 공유하는 모바일 미디어 시대로 접어들었다. 중국의 많은 관련 기업들은 이런 변화에 적응해서 위챗 공중플랫폼(WeChat Public Platform)을 신청하고 다양한 콘텐츠를 통한 비즈니스블 추구하고 있다. 지금까지 위챗 공중플랫폼에 대한 연구블 보면 크게 기능과 특징, 발전과 추세, 실제적 활용, 영향요소 등으로 구분된다. 이 중에 공중플랫폼의 영향요소에 관한 연구는 다른 연구에 비하여 대단히 적다. 특히 사용자 대상으로 공중플랫폼의 지속적 사용요인에 영향을 비치는 근원적 요인에 관한 연구가 아직 미미한 실정이다. 이에 본 연구는 공중플랫폼 수용자의 지속사용의도에 미치는 원천적인 영향요인을 살펴보고자 가치이론 기반으로 기대일치이론을 결합하고 관련된 변수를 탐색하였다. 문헌고찰을 통하여 콘텐츠 관련 요인, 인터페이스, 사회적 관계 및 성능 등 5 개 의 독립변수를 선택하고 지각된 가치와 이용만족의 2 개 매개변수를 통하여 지속적 사용의도에 미치는 영향 관계를 파악하였다.
An Efficient Multi-PCA Based On-line Monitoring Scheme for Multi-Stages Imperial Smelting Process
Zhi-kun Hu,Zhi-wen Chen,Wei-Hua Gui,Chun-hua Yang,Lin-zi Yin,Xiao-qi Peng 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.2
Imperial Smelting Process (ISP) is one of the main methods for Zinc and Lead smelting. In this paper, we firstly focus on its unique characteristics that ISP consists of many feeding cycles repeated in a similar way, and the normal process changes and multiple operating conditions would be frequently found in the process which would always lead to false alarms. To this end, we classify each feeding cycles of ISP into initial stage, transition stage, and steady stage, and use standard PCA, first order perturbation (FOP) based recursive dynamic PCA and multi-mode approach to deal with them respectively. The monitoring results using real data show that the proposed scheme can be able to eliminate false alarms and detect faults efficiently.
Observation of magnetoconductivity with terahertz probes for ferromagnetic Fe films
Huang Lin,Zhao Yunxiu,Le Thi Nguyen,Lee Sang-Hyuk,Peng Zhi,Kim Seongheun,Shin Hee Jun,Park Jaehun,Kim Hyun-Joong,Hong Jung-Il,Bang Junhyeok,Lee Hyun Seok,Kim Kyung Wan,Kim Dong-Hyun 한국물리학회 2022 Current Applied Physics Vol.41 No.-
Ultrafast characterization of spin-dependent transport behavior in ferromagnetic systems without contact probes has been of strong demand, recently. We have experimentally investigated spin-dependent complex conductivity for ferromagnetic Fe films of various thickness by means of terahertz time-domain transmission spectroscopy. Comparison of the transmitted terahertz wave amplitude and the spin-dependent conductivity reveals that the magnetization state of films effectively determines the complex conductivity. Non-invasive observation of spin-dependent conductivity by contact-free terahertz probe method is proven to be promising in further investigating spintronic materials, particularly on an ultrafast timescale.
Neoadjuvant Chemotherapy in Asian Patients With Locally Advanced Gastric Cancer
Shen Lin,Peng Zhi,Xie Tong 대한위암학회 2023 Journal of gastric cancer Vol.23 No.1
Presently, surgery is the only treatment approach for gastric cancer and improving the prognosis of locally advanced gastric cancer is one of the key factors in promoting gastric cancer survival benefit. The MAGIC study was the first to demonstrate the efficacy of neoadjuvant chemotherapy (NAC) in European countries. In recent years, several clinical trials have provided evidence for the use of NAC in Asian patients with locally advanced gastric cancer. However, clinical practice guidelines vary between Asian and non-Asian populations. Optimal NAC regimens, proper target populations, and predictors of NAC outcomes in Asian patients are still under investigation. Herein, we summarized the current progress in the administration of NAC in Asian patients with gastric cancer.
Convenient Synthesis of N-Methylpyrrolidine-2-thione and Some Thioamides
Zong, Zhi-Min,Peng, Yao-Li,Liu, Zhi-Gang,Zhou, Shi-Lu,Wu, Lin,Wang, Xiao-Hua,Wei, Xian-Yong,Lee, Chul Wee 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.2
The synthesis of thioamides and thiolactams, which are used as important organic intermediates, has attracted great attention. However, expensive reagents, severe reaction conditions and low yields of the target products made conventional methods inconvenient and economically infeasible. To overcome these disadvantages, we investigated a new process for synthesizing thioamides and thiolactams. We examine thermal reactions of CS_2 with N-methyl-2-pyrrolidinones, formylamide, acetamide and N, N-dimethylformylamide, respectively. The results show that under optimum conditions N-methylpyttolidine-2-thione and the corresponding thioamides can be obtained in good to excellent yields by the above thionation reactions.
Du, Ze-Peng,Wu, Bing-Li,Wang, Shao-Hong,Shen, Jin-Hui,Lin, Xuan-Hao,Zheng, Chun-Peng,Wu, Zhi-Yong,Qiu, Xiao-Yang,Zhan, Xiao-Fen,Xu, Li-Yan,Li, En-Min Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.16
NGAL (neutrophil gelatinase-associated lipocalin) is a novel cancer-related protein involves multiple functions in many cancers and other diseases. We previously overexpressed NGAL to analyze its role in esophageal squamous cell carcinoma (ESCC). In this study, a protein-protein interaction (PPI) was constructed and the shortest paths from NGAL to transcription factors in the network were analyzed. We found 28 shortest paths from NGAL to RELA, most of them obeying the principle of extracellular to cytoplasm, then nucleus. These shortest paths were also prioritized according to their normalized intensity from the microarray by the order of interaction cascades. A systems approach was developed in this study by linking differentially expressed genes with publicly available PPI data, Gene Ontology and subcellular localizaton for the integrated analyses. These shortest paths from NGAL to DEG transcription factors or other transcription factors in the PPI network provide important clues for future experimental identification of new pathways.
Mortality of Urinary Tract Cancer in Inner Mongolia 2008-2012
Xin, Ke-Peng,Du, Mao-Lin,Li, Zhi-Jun,Li, Yun,Li, Wuyuntana,Su, Xiong,Sun, Juan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6
The aim of this study was to determine the mortality rate and burden of urinary tract cancers among residents of Inner Mongolia. We analyzed mortality data reported by the Death Registry System from 2008 to 2012. The rate of mortality due to urinary tract cancer was 2.04 per 100,000 person-years for the total population, 2.91 for men, and 1.11 for women. Therefore, the mortality rate for men was 2.62-fold the mortality rate for women, constituting a statistically significant difference (p<0.001). Over the period 2008 through 2012, the total potential years of life lost was 1388.1 person-years for men and 777.1 person-years for women, and the average years of life lost were 7.71 years per male decedent and 12.0 years per female decedent. Mortality due to urinary tract cancers is substantially greater among the elderly population. Further, the mortality rate associated with urinary tract cancers is greater for elderly men than it is for elderly women. Therefore, in Inner Mongolia, urinary tract cancers appear to pose a greater mortality risk for men than they do for women.