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- 저자 : Keqin Li (검색결과 5 건)
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Phylogenetic Analysis on the Bacteria Producing Non-Volatile Fungistatic Substances
ZhiFang Li,ChangSong Zou,YueQiu He,MingHe Mo,KeQin Zhang 한국미생물학회 2008 The journal of microbiology Vol.46 No.3
This study characterized the soil bacteria producing non-volatile fungistatic substances. Among the 2,100 colonies of soil bacteria randomly isolated from seven agricultural soil samples, 518 isolates (24.67% of total) showed fungistatic activity toward nematophagous fungi Paecilomyces lilacinus and Trichoderma viride by producing non-volatile substances. A phylogenetic analysis based on amplified ribosomal DNA restriction analysis (ARDRA) and 16S rDNA sequence placed the 518 bacteria in three groups of the domain Bacteria: Actinomycetales, Bacillales, and Gammaproteobacteria. Three genera, Arthrobacter, Bacillus, and Pseudomonas, were the most frequently encountered groups.
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Antibacterial metabolites from the Actinomycete Streptomyces sp. P294
Huining Su,Hongwei Shao,Keqin Zhang,Guohong Li 한국미생물학회 2016 The journal of microbiology Vol.54 No.2
The Actinomycete strain P294 was isolated from soil and identified as Streptomyces sp. based upon the results of 16S rRNA sequence analysis. Three compounds obtained from the solid fermentation products of this strain have been determined by 1D, 2D NMR and HRMS experiments. These compounds include two new compounds angumycinones C (1) and D (2), and the known compound X-14881 E (3). All compounds were assayed for antibacterial and nematicidal activity. The results showed the three compounds had different degrees of inhibitory activity against several target bacteria but no significant toxicity against the nematode Caenorhabditis elegans.
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An XACML-based Security Pattern to achieve Socio-Technical Confidentiality in Smart Homes
Pierre Busnel,Sylvain Giroux,Paul El-Khoury,Keqin Li 보안공학연구지원센터 2009 International Journal of Smart Home Vol.3 No.1
In this paper we discuss and address multifold security challenges involved in the implementation of remote healthcare in smart homes. These security challenges are derived from real-world, industrially relevant scenarios. Validated security techniques and mechanisms providing certain security properties can be captured and implemented in security patterns, which can be applied in order to satisfy security requirements in the smart home healthcare scenarios. The presented results are parts of our ongoing research effort aiming at the development of an integrated security framework for remote healthcare and ambient intelligence systems.
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Enforcing Security in Smart Homes using Security Patterns
Paul El Khoury,Pierre Busnel,Sylvain Giroux,Keqin Li 보안공학연구지원센터 2009 International Journal of Smart Home Vol.3 No.2
Providing context-dependent security services is an important challenge in ambient intelligence. The complexity and the unbounded nature of such systems make it difficult for software developers to integrate security solutions. In order to solve this problem, in this paper we discuss and address multifold security challenges involved in the implementation of remote healthcare in smart homes using the security patterns approach. First the security challenges are derived from a real-world, industrially relevant scenario. Then it is shown how validated security techniques and mechanisms providing certain security properties can be captured and implemented in security patterns. Next security patterns are applied to satisfy security requirements in the smart home healthcare scenario. The process is exemplified thanks to a running prototype implementing the scenario.
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Association of CDKN2B-AS1 rs1333049 with Brain Diseases: A Case-control Study and a Meta-analysis
Jikuang Zhao,Xizheng Wu,Sheng Nie,Xiang Gao,Jie Sun,Keqin Li,Tiefeng Zhang,Yi Huang 대한정신약물학회 2017 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.15 No.1
Objective: CDKN2B-AS1 polymorphisms were shown to associate with the risk of stroke in European. The goal of this study was to evaluate the contribution of CDKN2B-AS1 rs1333049 to the risk of hemorrhagic stroke (HS) and brain tumor (BT) in Han Chinese. Methods: A total of 142 HSs, 115 BTs, and 494 controls were included in the current association study. The genotyping test was performed using the melting temperature shift method. Results: We failed to validate the association of CDKN2B-AS1 rs1333049 with the risk of brain disease. Significantly higher levels of low-density lipoprotein cholesterol (LDL-C) (p=0.027), high-density lipoprotein cholesterol (HDL-C) (p<0.001) and total cholesterol (TC) (p<0.001) were found in HSs in the genotype GG/GC carriers, but not the genotype CC carriers (p>0.05). The meta-analysis of 10 studies among 133,993 individuals concluded that rs1333049 of CDKN2B-AS1 gene was likely to increase a 16% incidence rate of cerebrovascular disease (CD) among various populations (odds ratio 1.16, 95% confidence interval 1.08-1.25; p<0.0001, random-effect method). Conclusion: Our case-control study identified rs1333049 genotypes showed different association with the concentration of the LDL-C, HDL-C and TC in the HS patients. Meta-analysis supported the association between rs1333049 and CD risk in various populations, although we were unable to observe association between rs1333049 and the risk of HSs in Han Chinese.
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