• Title/Summary/Keyword: ALI

Search Result 3,078, Processing Time 0.03 seconds

Solvent Extraction of Hydrochloric Acid Using Commercial Extractants and Synthesized Ionic Liquids (상용화 추출제 및 이온성액체에 의한 염산의 용매추출)

  • Nguyen, Viet Nhan Hoa;Lee, Man Seung
    • Resources Recycling
    • /
    • v.29 no.6
    • /
    • pp.79-87
    • /
    • 2020
  • The extraction and stripping of HCl from aqueous solutions by commercial extractants like LIX 63 and its mixture with TEHA/ Cyanex 923/ Aliquat 336 and ionic liquids like ALi-SCN, ALi-PC in kerosene was investigated. Among these extractants, ALi-PC showed the best extraction effectivity (above 80%), but it was difficult to strip HCl from the loaded phase. Although the extraction percentage of HCl by LIX 63 was not high, the stripping performance was above 81%. The addition of octanol to the organic phase led to negative effect on the extraction performance of HCl. The addition of C2H5OH into aqueous solutions significantly increased the extraction and stripping percentage of HCl by LIX 63, ALi-PC and ALi-SCN.

The Function of Two n-Alkane Inducible Genes (ALIl, POX18Cm) for n-Alkane Assimilating Candida maltosa (Candida maltosa에서 분리된 n-Alkane 유도성 유전자(ALI1, POX18Cm)의 n-Alkane 대사에 있어서의 기능)

  • ;;Masamichi Takagi
    • Microbiology and Biotechnology Letters
    • /
    • v.21 no.2
    • /
    • pp.181-186
    • /
    • 1993
  • The functions of n-alkane inducible genes, ALI1 and POX18Cm isolated from Canida maltosa were investigated, using it's distruptants. As a result, it is suggested that ALI1 is essential for n-alkane assimilation in C. mltosa and it regulates genes related to assimilation of n-alkane (ALI1, P450alk POX18Cm) at transcriptional level. Nuclear localization experiments indicated that ALI1 was located and functioned in the nucleus. POX18Cm is considered as a peroxisomal nonspecific lipid transfer protein gene related to n-alkane assimilation in C. maltosa also regulated by ALI1. But it had no significant effect on n-alkane assimilation in C. maltosa.

  • PDF

Role of the PLA2-Activated Neutrophilic Oxidative Stress in Oleic Acid-Induced Acute Lung Injury

  • Lee, Young-Man;Kim, Byung-Yong;Park, Yoon-Yub
    • Tuberculosis and Respiratory Diseases
    • /
    • v.68 no.2
    • /
    • pp.55-61
    • /
    • 2010
  • Background: The underlying pathogenesis of fat embolism-induced acute lung injury (ALI) has not been elucidated. In the present study, the pathogenesis of fat embolism-induced ALI was probed in association with neutrophilic oxidative stress in oleic acid (OA)-induced ALI of S-D rats. Methods: OA was injected intravenously to provoke ALI in experimental rats. Five hours later, indices of ALI were measured to confirm the role of the neutrophilic respiratory burst. The effect of an inhibition of phospholipase A2 (PLA2) was also evaluated. Results: The accumulation of neutrophils in the lung due to OA caused increased neutrophilic oxidative stress in lung, which was ameliorated by mepacrine. What were the results from inhibition of PLA2. Conclusion: Excess neutrophilic oxidative stress contributes to OA-induced ALI, which is lessened by the inhibition of PLA2.

Changes of Serum Ferritin in Acute Lung Injury Induced by Intestinal Ischemia/Reperfusion

  • Park, Sung-Dong;Park, Yoon-Yub
    • The Korean Journal of Physiology and Pharmacology
    • /
    • v.10 no.4
    • /
    • pp.187-191
    • /
    • 2006
  • Serum ferritin levels are increased in subjects at-risk for or with acute lung injury (ALI), and there are observations to suggest that increases in serum ferritin levels may help predict the development of ALI in at-risk individuals. To deepen our understanding of increases of serum ferritin and their relationship to the development of ALI, we measured serum ferritin levels before and after intestinal ischemia/reperfusion (I/R) injury in rats, and found that serum ferritin levels increased significantly following I/R. Increases in serum and lavage ferritin levels paralleled increases in lung inflammation (lavage leukocyte numbers and tissue myeloperoxidase activities) and lung leak (lavage protein levels). In contrast, pre-treatment of rats with mepacrine (60 mg/kg, i.p.), a phospholipase $A_2$ inhibitor, attenuated not only I/R-induced serum and lavage ferritin increases, but also the development of ALI. These findings indicate that, besides of human subjects with ALI, serum ferritin levels increase early on also in an animal model of ALI. Therefore, serum and lavage ferritin can be a candidate for early biomarker of ALI.

Study on the Shortest Path by the energy function in Hopfield neworks (홉필드 네트웍에서 에너지 함수를 이용한 최적 경로 탐색에 관한 연구)

  • Ko, Young-Hoon;Kim, Yoon-Sang
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.10 no.5
    • /
    • pp.215-221
    • /
    • 2010
  • Hopfield networks have been proposed as a new computational tool for finding the shortest path of networks. Zhang and Ali studied the method of finding shortest path by expended neurons of Hopfield networks. Ali Algorithm is well known as the tool with the neurons of branch numbers. Where a network grows bigger, it needs much more time to solve the problem by Ali algorithm. This paper modifies the method to find the synapse matrix and the input bias vector. And it includes the eSPN algorithm after proper iterations of the Hopfield network. The proposed method is a tow-stage method and it is more efficient to find the shortest path.The proposed method is verified by three sample networks. And it could be more applicable then Ali algorithm because it's fast and easy. When the cost of brach is changed, the proposed method works properly. Therefore dynamic cost-varing networks could be used by the proposed method.