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Kim, Jiye,Lew, Dae Hyun,Roh, Tai Suk,Lee, Won Jai by Mutaz B. Habal, MD. 2017 JOURNAL OF CRANIOFACIAL SURGERY - Vol.28 No.7
ABSTRACT: The selection of materials for orbital wall reconstruction has been a matter of debate. This study aimed to evaluate the effectiveness of an acellular allogenic dermal matrix (ADM) as an orbital wall reconstruction material and to compare the results of orbital wall reconstruction with the ADM to those of reconstruction with the more widely used absorbable mesh plate and porous polyethylene. We retrospectively reviewed the clinical charts and computed tomography images of 73 patients who underwent orbital reconstruction at 1 institution between March 2013 and February 2014. In the ADM group, the mean defect size of 29 patients was 2.89 cm. After orbital wall reconstruction with ADM, patients with preoperative enophthalmos (7 patients), limited range of eyeball movement (6 patients), and diplopia (12 patients) showed improvements. In the comparative study, the 3 groups showed no significant differences with respect to age distribution (P = 0.522), defect size (P = 0.455), and preoperative findings such as enophthalmos (P = 0.811), diplopia (P = 0.357), and limited range of eyeball movement (P = 0.795). All the preoperative symptoms improved in every group, and in the ADM group, no complication was observed during the postoperative follow-up. ADM is a biocompatible material that combines the flexibility and rigidity required to support the orbital soft tissue. Therefore, it could be an excellent alternative material for orbital wall reconstruction.
Kim, Seoni,Kim, Jiye,Kim, Seonghwan,Lee, Jaehan,Yoon, Jeyong The Royal Society of Chemistry 2018 Environmental science Vol.4 No.2
<P>Lithium has become one of the most important elements due to the rapid development of mobile devices and electronics lately. There has been a steep increase in the global demand for lithium, and developing an economic supply of lithium is thereby important for battery industries. This study presents a new method for recovering lithium in wastewater from battery recycling plants, in which a considerable amount of lithium (∼1900 mg L<SUP>−1</SUP>) is discarded. There was a significant amount of organic pollutants present in the wastewater (∼300 mg L<SUP>−1</SUP> of dissolved organic carbon), and so to resolve this, we proposed an electrochemical system containing a lithium-recovering electrode (lithium manganese oxide, LMO) and an oxidant-generating electrode (boron-doped diamond, BDD) to simultaneously recover lithium and decompose organic pollutants. Repeated operation of the electrochemical system demonstrated highly efficient and reliable lithium extraction and organic material removal from wastewater. After the lithium recovery system operation, a lithium-rich solution (98.6 mol% lithium among cations) was obtained, and the organic pollutants in the wastewater decreased by 65%. Furthermore, the electrochemical behavior of LMO and BDD was investigated under various operating conditions to provide useful insights into the industrial applications of our LMO/BDD system.</P>
Ectopic pleomorphic adenoma on subcutaneous plane of the cheek
Kim, Yong Hun,Yoon, Hyung Woo,Kim, Jiye,Kim, Sug Won Korean Cleft Palate-Craniofacial Association 2019 Archives of Craniofacial Surgery Vol.20 No.1
Pleomorphic adenoma is the most common benign tumor of the salivary gland. Pleomorphic adenoma occurs most commonly in the parotid gland but it may involve other salivary gland such as submandible or lingual. We report an ectopic pleomorphic adenoma in the subcutaneous layer of the face. A woman presented with a mass of the nasolabial fold. After excision of the mass, it was revealed as an pleomorphic adenoma pathologically. An ectopic pleomorphic adenoma which was located in the subcutaneous layer of the face is very rare in medical literature.
Kim, Jiye,Kim, Hyekyoung,Kim, Se Hyun,Park, Chan Eon American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.2
<P>We successfully fabricated highly stable pentacene-based bottom-contact organic field-effect transistors (OFETs) with good charge injection properties at the electrode/organic semiconductor interface, obtained by optimizing the composition of solution-processed (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate):polytetrafluoroethylene ((PEDOT:PSS):PTFE)-treated Au source/drain (S/D) electrodes. The (PEDOT:PSS):PTFE layer was deposited on the Au layer by spin-coating a mixture solution. The work function of the electrode increased from 4.84 to 5.21 eV as the PTFE concentration increased, accompanied by an interface dipole at the electrode surface. The optimized (PEDOT:PSS):PTFE (0.95:0.05)-treated electrodes significantly reduced the charge injection barrier at the electrode/semiconductor interface to achieve efficient charge transfer in the OFETs. Bottom-contact OFETs prepared with the optimized (PEDOT:PSS):PTFE-treated S/D electrodes had a field-effect mobility of 0.16 cm(2)/(V.s), which exceeded that of PEDOT:PSS-treated S/D electrodes (0.073 cm(2)/(V.s)). The operational stability of the optimized device was remarkable under gate-bias stress (V-G = -40 V over 3 h).</P>
Kim, Yebyeol,An, Tae Kyu,Kim, Jiye,Hwang, Jihun,Park, Seonuk,Nam, Sooji,Cha, Hyojung,Park, Won Jeong,Baik, Jeong Min,Park, Chan Eon The Royal Society of Chemistry 2014 Journal of Materials Chemistry C Vol.2 No.23
<▼1><P>The receptor material (OA-GO)/polymeric semiconductor (F8T2) structure is newly introduced to active layer of OFET gas sensors and demonstrated to have better sensing ability than a comparable device with a polymer-only active layer.</P></▼1><▼2><P>We report the fabrication of a gas sensor with an oleylamine-modified graphene oxide (OA-GO)/poly(9-9′-dioctyl-fluorene-<I>co</I>-bithiophene) (F8T2) composite as an active layer and demonstrate that it has better sensing ability than a comparable device with an F8T2-only active layer. OA-GO was chosen as the receptor material because of its enhanced interaction with gas analytes and its easy mixing with F8T2. OA-GO was synthesized by a simple condensation reaction between GO and oleylamine (9-octadecylamine), and characterized by Fourier transform infrared spectroscopy. The sensitivities of the gas sensors with respect to acetone and ethanol analytes were investigated by measuring the electrical parameters of the corresponding organic field effect transistor at room temperature. The sensitivity of the OA-GO/F8T2 composite device was up to 34 times that of the F8T2 device for the mobility change of acetone.</P></▼2>
Kim, Jiye,Lee, Changha,Yoon, Jeyong American Chemical Society 2018 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.57 No.33
<P>Peroxodisulfate (PDS, S<SUB>2</SUB>O<SUB>8</SUB><SUP>2-</SUP>) is one of the strong oxidants (<I>E</I>°[S<SUB>2</SUB>O<SUB>8</SUB><SUP>2-</SUP>/HSO<SUB>4</SUB><SUP>-</SUP>] = 2.12 V<SUB>NHE</SUB>), which is widely used for radical polymerization or wastewater treatment. In electrochemical PDS generation, its efficiency highly depends on the •OH generating electrode materials. A boron-doped diamond (BDD) used in electrochemical PDS generation is very expensive prompting the need for new electrode materials for PDS generation. This study reports the self-doped TiO<SUB>2</SUB> nanotube array electrodes (blue and black TNAs) for PDS generation which are cheap and effective for generating a significant amount of •OH and comparable to BDD electrodes. Blue and black TNA electrodes were excellent for PDS generation exhibiting high current efficiencies for PDS generation (46% and 22%, respectively). Similar to the BDD electrode, it was also confirmed that •OH was the key precursor to the PDS generation on the self-doped TNA electrodes from the linear relationship between the PDS generation rate and •OH generation.</P> [FIG OMISSION]</BR>