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Inhye Park,Jina Leem,Hoo-Yong Lee,민요셉 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
When atomic layer deposition (ALD) is performed on a porous material by using an organometallic precursor, minimum exposure time of the precursor for complete coverage becomes much longer since the ALD is limited by Knudsen diffusion in the pores. In the previous report by Min et al. (Ref. 23), shrinking core model (SCM) was proposed to predict the minimum exposure time of diethylzinc for ZnO ALD on a porous cylindrical alumina monolith. According to the SCM, the minimum exposure time of the precursor is influenced by volumetric density of adsorption sites, effective diffusion coefficient, precursor concentration in gas phase and size of the porous monolith. Here we modify the SCM in order to consider undesirable adsorption of byproduct molecules. TiO2 ALD was performed on the cylindrical alumina monolith by using titanium tetrachloride (TiCl4) and water. We observed that the byproduct (i.e., HCl) of TiO2 ALD can chemically adsorb on adsorption sites, unlike the behavior of the byproduct (i.e., ethane) of ZnO ALD. Consequently, the minimum exposure time of TiCl4 (~16 min) was significantly much shorter than that (~ 71 min) of DEZ. The predicted minimum exposure time by the modified SCM well agrees with the observed time. In addition, the modified SCM gives an effective diffusion coefficient of TiCl4 of ~1.78 × 10−2 cm2/s in the porous alumina monolith.
Characterization of an activation-tagged mutant with delayed flower abscission in Arabidopsis
Inhye Lee,Soon-Ki Park,Moon-Soo Soh 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Toward molecular understanding of flower senescence/abscission, we have identified a mutant, designated as dea1-1D (dealyed abscission1-1D), with delayed flower senescence/abscission syndrome from activation-tagged pools. Phenotypic analysis revealed pleiotropic effects of dea1-1D mutation including delayed flowering as well as smaller serrated leaves. Genetic analysis showed that it is a dominant mutation. Molecular analysis on the flower senescence syndrome indicated that dea1-1D might define novel regulatory branch of flower abscission, controlling expression of ethylene-responsive AP2 transcription factor. On the contrary, triple responses was not affected by dea1-1D mutant. Though the penetrance was not complete, the mutant phenoytpes was shown to be tightly linked with the T-DNA selection marker, BASTA-resistance. We identified the T-DNA insertion site through molecular cloning of the T-DNA flanking genomic DNA and found that a neighboring gene was overexpressed in the dea1-1D mutant. Together with gene expression analysis, we will discuss possible function of DEA1 during flower senescence and abscission.
Thalassobius litorarius sp. nov., isolated from a tidal flat
Park, Inhye,Cha, In-Tae,Seo, Myung-Ji Microbiology Society 2016 International journal of systematic and evolutiona Vol.66 No.-
<P>A Gram-stain-negative, aerobic, non-motile and rod-shaped bacterium, belonging to the family Rhodobacteraceae, designated strain MME-075(T), was isolated from a tidal flat. Strain MME-075(T) grew with 1-5 % (w/v) NaCl at 20-35 degrees C and at pH 7-9. Optimal growth occurred with 2 % (w/v) NaCl at 25-30 degrees C and at pH 7. The dominant respiratory quinone was ubiquinone-10, whereas summed feature 8 (C-18 : 1 omega 7c and/or C-18 : 1 omega 6c), 11-methyl C-18 : 1 omega 7c, and C-16 : 0 were the major fatty acids. The major polar lipids were phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and an unidentified lipid. The genomic DNA G+C content was 62.1 mol%. The highest 16S rRNA gene sequence similarity values were between strain MME-075(T) and Thalassobius aestuarii, Thalassococcus lentus, Thalassobius maritimus and Shimia marina and were 97.6, 97.5, 97.2 and 96.2 %, respectively. Neighbour-joining, maximum-likelihood and maximum-parsimony phylogenetic trees, based on 16S rRNA gene sequences, revealed that strain MME-075(T) clustered with species of the genus Thalassobius. Based on phenotypic and phylogenetic taxonomic properties, this strain is proposed as a representative of a novel species of the genus Thalassobius, for which the name Thalassobius litorarius sp. nov. is proposed. The type strain is MME-075(T) (=KCCM 43143(T) =JCM 30758(T)).</P>
Park, Inhye,Leem, Jina,Lee, Hoo-Yong,Min, Yo-Sep Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
When atomic layer deposition (ALD) is performed on a porous material by using an organometallic precursor, minimum exposure time of the precursor for complete coverage becomes much longer since the ALD is limited by Knudsen diffusion in the pores. In the previous report by Min et al. (Ref. 23), shrinking core model (SCM) was proposed to predict the minimum exposure time of diethylzinc for ZnO ALD on a porous cylindrical alumina monolith. According to the SCM, the minimum exposure time of the precursor is influenced by volumetric density of adsorption sites, effective diffusion coefficient, precursor concentration in gas phase and size of the porous monolith. Here we modify the SCM in order to consider undesirable adsorption of byproduct molecules. $TiO_2$ ALD was performed on the cylindrical alumina monolith by using titanium tetrachloride ($TiCl_4$) and water. We observed that the byproduct (i.e., HCl) of $TiO_2$ ALD can chemically adsorb on adsorption sites, unlike the behavior of the byproduct (i.e., ethane) of ZnO ALD. Consequently, the minimum exposure time of $TiCl_4$ (~16 min) was significantly much shorter than that (~71 min) of DEZ. The predicted minimum exposure time by the modified SCM well agrees with the observed time. In addition, the modified SCM gives an effective diffusion coefficient of $TiCl_4$ of ${\sim}1.78{\times}10^{-2}\;cm^2/s$ in the porous alumina monolith.
Groundwater productivity potential mapping using evidential belief function.
Park, Inhye,Kim, Yongsung,Lee, Saro Water Well Journal Pub. Co 2014 Ground Water Vol.52 No.suppl1
<P>The evidential belief function (EBF) model was applied and validated for analysis of groundwater-productivity potential (GPP) in Boryeong and Pohang cities, agriculture region in Korea using geographic information systems (GIS). Data about related factors, including topography, lineament, geology, forest, soil, and groundwater data were collected and input into a spatial database. Additionally, in the Boryeong area, specific capacity (SPC) data not lower than 4.55 m3 /d/m were collected, corresponding to 300 m3 /d yield from 72 well locations. In the Pohang area, SPC data of 6.25 m3 /d/m were collected, corresponding to a yield of 500 m3 /d from 44 well locations. By using the constructed spatial database, 19 factors related to groundwater productivity were extracted. The relationships between the well locations and the factors were identified and quantified by using the EBF model. Four relationships were calculated: belief (Bel), disbelief (Dis), uncertainty (Unc), and plausibility (Pls). The relationships were used as factor ratings in the overlay analysis to create GPP indices and maps. The resulting GPP maps showed 83.41% and 77.53% accuracy in Boryeong and Pohang areas, respectively. The EBF model was found to be more effective in terms of prediction accuracy.</P>
RIX-MAC: An Energy-Efficient Receiver-Initiated Wakeup MAC Protocol for WSNs
( Inhye Park ),( Hyungkeun Lee ),( Seokjoong Kang ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.5
This paper proposes RIX-MAC (Receiver-Initiated X-MAC), a new energy-efficient MAC protocol based on an asynchronous duty cycling. RIX-MAC improves energy efficiency through utilizing short preambles and adopting the receiver-initiated approach, where RIX-MAC minimizes sender nodes` energy consumption by enabling transmitters to predict receiver nodes` wake-up times. It also reduces receiver nodes` energy consumption by decreasing the number of control frames. We use the network simulator to evaluate RIX-MAC`s performance. Compared to the prior asynchronous duty cycling approaches of X-MAC and PW-MAC, the proposed protocol shows a remarkable improvement in energy-efficiency and end-to-end delay.