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Lim, Seong-Rin,Park, Jong Moon Elsevier 2009 Journal of environmental management Vol.90 No.11
<P><B>Abstract</B></P><P>Life cycle impact assessment (LCIA) is performed to quantitatively evaluate all environmental impacts from products, systems, processes and services. However, LCIA does not always provide valuable information for choosing among alternatives with different specifications, functionalities and lifetimes. The objectives of this study are (1) to propose environmental indicators to evaluate environmental efficiency and value qualitatively and quantitatively on the basis of analogies to financial and economic indicators, and (2) to present the application of the indicators. Incremental evaluation using a reference is employed to obtain the environmental indicators. The environmental efficiency indicators are conceptually based on the ratios of reduced environmental burdens returned to environmental burdens required: environmental return on investment, environmental payback period and environmental internal rate of return. The environmental value indicator is the sum of all reduced and required environmental burdens: i.e., environmental net present value. All the environmental indicators can be used to compare and rank the environmental efficiencies or values of alternatives. The environmental efficiency indicators can be applied to a new environmental labeling. The concept of eco-efficiency labeling is developed by combining the environmental efficiency indicators with financial indicators. A case study is performed to illustrate the necessity and importance of the environmental indicators. These environmental indicators can help easily communicate LCIA results in the field of environmental management.</P>
( Seong-rin Lim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
To commit to the global challenges of climate change and energy security, our society needs to use various renewable energy resources. Among them, a diverse range of combustible wastes are readily utilized because waste-to-energy technology is mature and has been well established. However, waste-to-energy has the potential to incur environmental and human health concerns related with toxic heavy metals in combustible wastes during ashes disposal and recycling as well as waste combustion Thus, this study suggests a practical methodology to screen toxic combustible wastes and to identify priority heavy metals to be targeted for pollution prevention. The methodology is based on the assessment of toxicity potentials (i.e., cancer, non-cancer, and eco-toxicity potentials) from heavy metals in combustible wastes on a per-energy basis. The toxicity potential is quantified by using the heavy metal contents and low heating value (LHV) of a combustible waste and the characterization factors accounting for the fate, exposure, and effect of heavy metals. This study can be used for energy facilities to practically screen less toxic fuels from locally available combustible wastes and to easily select post-treatment processes for the removal of priority heavy metals.
Environmental and economic analysis of a water network system using LCA and LCC
Lim, Seong‐,Rin,Park, Jong Moon American Institute of Chemical Engineers 2007 AIChE Journal Vol.53 No.12
<P><B>Abstract</B></P><P>Water network synthesis has been used to conserve water resources and reduce costs. The objective of this study was to verify the higher eco‐efficiency of a water network system (WNS), and to identify principal contributors to environmental burdens and economic costs using life cycle assessment (LCA) and life cycle costing (LCC). The WNS was compared to the conventional water system (CWS). LCA and LCC results showed that the total environmental burdens and life cycle cost of the WNS were lower than those of the CWS. The consumptions of industrial and ionized water were principal contributors to the environmental and economic burdens. The third principal contributor to the environmental burdens was electricity consumption, but that to the economic costs was piping cost. These principal contributors can be employed to obtain the simple and practical mathematical optimization models synthesizing the most environmentally friendly, economical, or sustainable WNSs. © 2007 American Institute of Chemical Engineers AIChE J, 2007</P>
Tae-Rin Kwon,Dong Wook Moon,Jungwook Kim,Hyoung Jun Kim,Seong Jae Lee,Yunhee Han,Hee Won Dan,Sang Hoon Chi,Hwan Mo Seong,Hee Jung Kim,Guei-Sam Lim,Jungkwan Lee 대한의학레이저학회 2021 MEDICAL LASERS Vol.10 No.2
Background and Objectives: Skin aging is reportedly associated with regulation in collagen and elastin synthesis. This study investigated the potential of combining light-emitting diode (LED) treatments using a 630-nm and 850-nm LED with simultaneous microcurrent application. Materials and Methods: The dorsal skin of female pigs was treated with a home-use device. We examined the treatment effects using photography, thermocamera, microscopic pathology, and histological examination to determine the mechanism of action, efficacy, and safety of the procedure. A histological observation was performed using hematoxylin and eosin, Masson’s trichrome, Victoria blue, and immunohistochemical staining. We also used the Sircol soluble collagen and elastin assay kit to measure the amounts of collagen and elastin in the porcine back skin tissue after 2 and 6 weeks. Results: Evaluation by visual inspection and devices showed no skin damage or heat-induced injury at the treatment site. Histological staining revealed that accurate treatment of the targeted dermis layer effectively enhanced collagen and elastin deposition. Collagen type I, a protein defined by immunohistochemical staining, was overexpressed in the early stages of weeks 2 and 6. Combined therapy findings showed the superior capability of the 630-nm and 850-nm LED procedures to induce collagen; in contrast, elastin induction was more pronounced after microcurrent treatments. Conclusion: The home-use LED device, comprising a combination of 630-nm and 850-nm LEDs and microcurrent, is safe and can be used as an adjunctive treatment for self-administered facial rejuvenation.
Park, Seong Ji,Lee, Seung Koo,Lim, Chae Rin,Park, Hye Won,Liu, Fang,Kim, Seong-Jin,Kim, Byung-Chul Academic Press 2018 Biochemical and biophysical research communication Vol. No.
<P><B>Abstract</B></P> <P>Heme oxygenase-1 (HO-1) has been implicated in tumor progression, but the underlying molecular mechanisms remain largely unknown. Transforming growth factor-β1 (TGF-β1) exhibits cytostatic and apoptotic effects in hepatocytes and several types of hepatocellular carcinoma (HCC) cell lines, and deregulation of its signaling pathway is linked to hepatic tumorigenesis. In the present study, we observed that HO-1 is expressed at higher levels in HCC tissues than in paired normal tissues. Moreover, TGF-β1-induced cell cycle arrest and up-regulation of cyclin-dependent kinase inhibitors in HCC cell lines were significantly attenuated by overexpression of HO-1 or treatment with tricarbonyldichlororuthenium(II) dimer ([Ru(CO)<SUB>3</SUB>Cl<SUB>2</SUB>]<SUB>2</SUB>, suggesting an inhibitory role of the HO-1/CO axis in TGF-β signaling to growth inhibition in HCC cell lines. Interestingly, we observed that [Ru(CO)<SUB>3</SUB>Cl<SUB>2</SUB>]<SUB>2</SUB> inhibits TGF-β1-induced Smad3-dependent reporter activity without affecting its C-terminus phosphorylation, complex formation with Smad4, and nuclear translocation. Additional experiments revealed that HO-1/CO axis selectively induces phosphorylation of Smad3 at Thr-179 residue in the linker region through activation of extracellular signal-activated kinase (ERK) 1/2. Transfection with a phospho-deficient Smad3 (T179A) mutant or treatment with FR180204, a specific inhibitor for ERK1/2, significantly reversed the inhibitory effects of HO-1 and [Ru(CO)<SUB>3</SUB>Cl<SUB>2</SUB>]<SUB>2</SUB> on cell cycle arrest induced by TGF-β1. These findings for the first time demonstrate that HO-1/CO axis confer resistance of HCC cells to TGF-β growth inhibitory signal by increasing Smad3 phosphorylation at Thr-179 via ERK1/2 pathway.</P> <P><B>Highlights</B></P> <P> <UL> <LI> HO-1/CO axis inhibits TGF-β1-induced growth inhibition in human HCC cell lines. </LI> <LI> HO-1/CO axis inhibits TGF-β1-induced Smad3 activation. </LI> <LI> HO-1/CO axis selectively induces Smad3 phosphorylation at Thr179. </LI> <LI> Smad3 Thr179 phosphorylation mediates the inhibition of TGF-β responses by HO-1. </LI> <LI> ERK1/2 mediates HO-1 or CO-induced Smad3 phosphorylation at Thr179. </LI> </UL> </P>
Highly efficient capture of naphthalene by nonionic surfactants in hydrogel capsules
Chatterjee, Sudipta,Lim, Seong-Rin,Lee, Min W.,Woo, Seung H. Elsevier 2017 JOURNAL- TAIWAN INSTITUTE OF CHEMICAL ENGINEERS Vol.78 No.-
<P><B>Abstract</B></P> <P>The impregnation of Triton X-100 (TX100) in chitosan capsules (TCC) via an anionic surfactant gelation method was investigated for the sorption of naphthalene (NAP) from aqueous solutions. Impregnation with TX100 enhanced NAP sorption at all tested concentrations of TX100, ranging from 0.1 to 10g/l. The highest NAP sorption capacity (68.7mg/g) was obtained at 2g/l of TX100, a capacity 5.1-fold higher than that of chitosan capsules without TX100 impregnation (CC) (13.4mg/g). The highest molar sorption ratio of capsule (<I>MSR<SUB>C</SUB> </I>) was 12.23mol NAP/mol TX100 at 0.1g/l, which was much higher than the <I>MSR<SUB>B</SUB> </I> for beads (0.70) and the <I>MSR<SUB>W</SUB> </I> for the aqueous phase (0.11). Thus, when a nonionic surfactant is present in a hydrogel capsule, the ability of the surfactant to solubilize organic chemicals can be significantly increased compared to the surfactant in water or in hydrogel beads.</P> <P> <UL> <LI> Highlights </LI> </UL> <ce:list id='celist0002'> <ce:list-item id='celistitem0002'> <ce:label>•</ce:label> <ce:para id='para0002' view='all'>Chitosan hydrogel capsules were formed by a surfactant gelation method.</ce:para> </ce:list-item> <ce:list-item id='celistitem0003'> <ce:label>•</ce:label> <ce:para id='para0003' view='all'>Impregnation of a nonionic surfactant in hydrogel capsules enhanced naphthalene sorption.</ce:para> </ce:list-item> <ce:list-item id='celistitem0004'> <ce:label>•</ce:label> <ce:para id='para0004' view='all'>The effect of a nonionic surfactant impregnation was much higher in capsules than in beads.</ce:para> </ce:list-item> <ce:list-item id='celistitem0005'> <ce:label>•</ce:label> <ce:para id='para0005' view='all'>Nonionic surfactants in hydrogel capsules can be used as separate-phase surfactants.</ce:para> </ce:list-item> </ce:list> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>