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이계영,민경인,정수일,박재범,안재진,김도균,김철환 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.4
Soft tissue expansion is widely used technique in oral & maxillofacial reconstruction and provide new method of reconstruction in posttraumatic alopecia, post burn, wide scar, congenital deformity, benign tumor, tattoo, etc. Expanded tissue flaps have the advantage of increased vascularity, proximity to the defect, and similarity of color and texture. They also preclude the need to advance flaps from distant sites. Tissue expansion can be used to form a well vascularized cavity to accomodate and nourish bone grafts. The following report describes the uses of tissue expanders by allowing bone grafting to correct both soft and bony defects of mandibular region
Yongsik Kim,Minkyung Bae,Woojoon Kim,Dongsik Kong,Hyun Kwang Jung,Hyungtak Kim,Sunwoong Kim,Dong Myong Kim,Dae Hwan Kim IEEE 2012 IEEE transactions on electron devices Vol.59 No.10
<P>A combination of the multifrequency <I>C</I>- <I>V</I> and the generation-recombination current spectroscopy is proposed for a complete extraction of density of states (DOS) in amorphous InGaZnO thin-film transistors (a-IGZO TFTs) over the full subband-gap energy range (<I>EV</I> ≤ <I>E</I> ≤ <I>EC</I>) including the interface trap density between the gate oxide and the a-IGZO active layer. In particular, our result on the separate extraction of acceptor- and donor-like DOS is noticeable for a systematic design of amorphous oxide semiconductor TFTs because the former determines their dc characteristics and the latter does their threshold voltage (<I>VT</I>) instability under practical operation conditions. The proposed approach can be used to optimize the fabrication process of thin-film materials with high mobility and stability for mass-production-level amorphous oxide semiconductor TFTs.</P>
김배환 ( Bae Hwan Kim ),이준혁 ( Joon Hyuk Lee ),백두산 ( Du San Baik ),윤승욱 ( Seoung Wook Yun ),김지환 ( Ji Hwan Kim ),공재환 ( Jae Hwan Kong ),김석배 ( Seok Bae Kim ) 대한소화기학회 2007 대한소화기학회지 Vol.50 No.6
Gastrointestinal stromal tumor (GIST) is an uncommon mesenchymal tumor of the gastrointestinal tract and is generally located in the stomach and small intestine. They usually present with abdominal pain, gastrointestinal bleeding, and palpable mass. Some patients present with rare symptoms that are more common in malignant GIST. Malignant GIST combined with a liver abscess has not been reported yet in the literatures. We report a case of 67-year-old woman who suffered from liver abscess combined by malignant GIST with central necrosis and fistula in the ileum. She complained of fever, chills, and abdominal pain. Abdominal CT scan showed huge liver abscess and ileal mass with air pocket. Small bowel series showed contrast material filling into the ileal GIST mass. An operation was performed and the final diagnosis was malignant GIST of the ileum with invasion into the sigmoid colon and urinary bladder. (Korean J Gastroenterol 2007;50:393-397)
Solvent-dependent structure of molecular iodine probed by picosecond X-ray solution scattering
Kim, Kyung Hwan,Ki, Hosung,Lee, Jae Hyuk,Park, Sungjun,Kong, Qingyu,Kim, Jeongho,Kim, Joonghan,Wulff, Michael,Ihee, Hyotcherl The Royal Society of Chemistry 2015 Physical chemistry chemical physics Vol.17 No.14
<P>The effect of solute–solvent interaction on molecular structure and reaction dynamics has been a target of intense studies in solution-phase chemistry, but it is often challenging to characterize the subtle effect of solute–solvent interaction even for the simplest diatomic molecules. Since the I<SUB>2</SUB> molecule has only one structural parameter and exhibits solvatochromism, it is a good model system for investigating the solvent dependence of the solute structure. By using X-rays as a probe, time-resolved X-ray liquidography (TRXL) can directly elucidate the structures of reacting molecules in solution and can thus determine the solvent-dependent structural change with atomic resolution. Here, by applying TRXL, we characterized the molecular structure of I<SUB>2</SUB> in methanol and cyclohexane with sub-angstrom accuracy. Specifically, we found that the I–I bond length of I<SUB>2</SUB> is longer in the polar solvent (methanol) by ∼0.2 Å than in nonpolar solvents (cyclohexane and CCl<SUB>4</SUB>). Density functional theory (DFT) using 22 explicit methanol molecules well reproduces the longer I–I bond of molecular iodine in methanol and reveals that the larger bond length originates from partial negative charge filled in an antibonding σ* orbital through solvent-to-solute charge transfer.</P> <P>Graphic Abstract</P><P>Time-resolved X-ray liquidography reveals the molecular origin of the solvent-dependent bond length of iodine in solution. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5cp00536a'> </P>
Kim Jin Seok,Jang Jun Ho,Jo Deog-Yeon,Ahn Seo-Yeon,Yoon Sung-Soo,Lee Je-Hwan,Kim Sung-Hyun,Choi Chul Won,Shin Ho-Jin,Kim Min-Kyoung,Lee Jae Hoon,Mun Yeung-Chul,Kong Jee Hyun,Hyun BokJin,Nam HyunSun,Ki 대한의학회 2023 Journal of Korean medical science Vol.38 No.41
Background: Paroxysmal nocturnal hemoglobinuria (PNH) is a rare hematologic disorder characterized by uncontrolled terminal complement activation. Eculizumab, a monoclonal antibody C5 inhibitor was introduced in Korea in 2009 and has been the standard treatment option for PNH. Methods: This study assessed the long-term efficacy/safety of eculizumab in PNH using real-world data from the Korean Health Insurance Review and Assessment Service. Eighty patients who initiated eculizumab from 2009–2020 were enrolled. Results: At eculizumab initiation, the median age was 51.5 years, lactate dehydrogenase (LDH) 6.8 × upper limit of normal, and granulocyte clone size 93.0%. All patients had at least one PNH-related complication before eculizumab initiation, including renal failure (n = 36), smooth muscle spasm (n = 24), thromboembolism (n = 20), and pulmonary hypertension (n = 15). The median (range) duration of eculizumab treatment was 52.7 (1.0, 127.3) months (338.6 total treated patient-years). Despite high disease activity in the study population before treatment initiation, overall survival was 96.2% and LDH levels were stabilized in most patients during treatment. PNH-related complications at treatment initiation were resolved in 44.4% of patients with renal failure, 95.8% with smooth muscle spasm, 70.0% with thromboembolism, and 26.7% with pulmonary hypertension. Extravascular hemolysis occurred in 28.8% of patients (n = 23; 0.09 per patient-year) and breakthrough hemolysis in 18.8% (n = 15; 0.06 per patient-year). No treatment discontinuation cases related to eculizumab were observed. Conclusion: These data provided evidence for the long-term efficacy and safety of eculizumab in Korean PNH patients with high disease burdens.
Morphology transformation of patterned, uniform and faceted GaN microcrystals
Kim, Tae Woong,Hong, Young Joon,Yi, Gyu-Chul,Kwon, Ji-Hwan,Kim, Miyoung,Han, Heung Nam,Kim, Do Hyun,Oh, Kyu Hwan,Kong, Ki-jeong,Kwon, Young-Kyun Institute of Physics [etc.] 2008 Journal of physics. D, applied physics Vol.41 No.1
<P>We report on the growth and characterization of patterned and uniformly distributed GaN microcrystals with well-defined facets and epitaxy. The microcrystals were grown on a mask patterned by lithography. The GaN microcrystals were formed by selective-area epitaxy using metal-organic chemical-vapour deposition. The GaN microcrystals have similar sizes and shapes. Each microcrystal consists of an upper and a lower part, which are rotated by 30?. Transmission electron microscopy shows that there is a rather clear interface between the two parts of the crystal, suggesting a sudden change in the growth direction. We performed <I>ab initio</I> calculations for the surface energies of hexagonal GaN, and the growth morphology is explained based on surface energy considerations.</P>