http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Growth of epitaxial C54 TiSi₂on Si(111) substrate by in situ annealing in ultrahigh vacuum
Koh, Jeoung Dae,Choi, Chi Kyu,Lee, Jeoung Ju,Kim, Kun Ho,Hong, Sung Rak,Seo, Dong Ju,Lee, Jeong Yong,Kim, Sung Chul,Nicolet, Marc A. 동의대학교 기초과학연구소 1993 基礎科學硏究論文集 Vol.3 No.1
The growth of Ti and the formation of epitaxial Ti silicide on Si(111)-7×7 were investigated by using reflection high-energy electron diffraction (RHEED) and high-resolution transmission electron microscopy (HRTEM). The growth mode of Ti is Stransky-Krastanov type when the substrate temperature is room temperature (RT). On the other hand, it is Volmer-Weber type when the substrate temperature is ∼550℃. The HRTEM lattice image and transmission electron diffraction pattern show that C54 TiSi₂ is grown epitaxially on a Si substrate when 160 ML of Ti is deposited on a Si(111)-7×7 surface at RT followed by in situ annealing at 750℃ for 10 min in ultrahigh vacuum (UHV). The TiSi₂crystallites are single crystal with matching face relationships of TiSi₂(111)∥Si(111), TiSi₂(311)∥Si(111), and TiSi₂(022)∥Si(111). A thin single-crystal Si overlayer with [111] direction is grown on the TiSi₂surface when TiSi₂/Si(111) is annealed at ∼900℃ in UHV, which is confirmed by observing the Si(111)-7×7 RHEED pattern.
이정길(Jeong-Gil Lee),고일현(Il-Hyun Koh),김형식(Hyung-Sik Kim),최윤락(Yun-Rak Choi),김성재(Sung-Jae Kim),강호정(Ho-Jung Kang) 대한견주관절의학회 2010 대한견주관절의학회지 Vol.13 No.2
목적: Mason 분류 제 2형 및 일부의 3형 요골 두 및 경부 골절에 대하여 제한적 피부절개 및 경피적 도수 정복술 시행 후 기능 및 방사선학적 평가를 통해 임상적 결과를 분석하고자 하였다. 대상 및 방법: 2001년 5월부터 2007년 2월까지 Mason 분류 제 2형 또는 3형의 요골 두 및 경부 골절로 경피적 도수 정복술을 시행받은 13명의 환자 (요골 경부 골절: 9예, 요골 두 및 경부골절: 4예)를 대상으로 하였으며, 환자의 평균 연령은 29세 (11세~59세)였고 남자는 8명, 여자는 5명 이었다. 평균 추시 기간은 1년 6개월 (12개월~2년 9개월)이었다. 요골 두 및 경부의 도수 정복술은 방사선 투시기를 사용하여 골절부위를 확인 후, 골절부위 2~3 cm 원위부에서 1 cm 정도의 피부절개 후 경막 거상기를 이용하여 압박이나 감입 (impacted)형태의 요골 경부골절 및 두부의 부분 함몰된 관절면 골편의 정복을 시행하였다. 정복 후 불안정한 3예에 대해 1예에서 골절부의 경피적 핀고정술을 시행하였고, 2예에서 근위 요척골 간에 경피적 횡 핀고정을 추가 하였으며, 나머지 10예에서는 석고 부목 고정술만 시행하였다. 결과: 방사선학적 평가상 전 예에서 골유합이 관찰되었다. 평균 골유합 기간은 6.2주였다.요골두의 각형성은 수술 전 평균 33.2도 (30도~42도)에서 수술 후 평균 7.8도 (4도~15도)로 감소하였다. 수술 직후에서 최종 추시시까지의 각변형은 0.7도 (-1도~2도) 였다. 수술 후 주관절의 운동 범위는 굴곡 평균 133.1도 (120도~140도), 신전 평균 7.3도 (0도~25도), 회내전은 80도 (72도~90도), 회외전은 84.3도 (78도~90도)였다. Mayo Elbow Performance Index는 평균 96.2점 (80점~100점), American Shoulder and Elbow Surgeons elbow score는 평균 97점 (83점~100점), Disabilities of the Arm, Shoulder and Hand score는 평균 1.2점 (0점~5.8점) 으로 우수한 결과를 얻었다. 합병증으로 각각 한 예에서 일시적인 후골간 요골 신경 마비 증상과 경도의 주관절 외반 변형이 발생하였다. 결론: 경피적 도수 정복술은 관절내 독립적인 감입이 없는 Mason 분류 제 2형 및 일부의 3형 요골 두 골절 및 경부 골절의 치료에 있어서 간단하고 합병증 발생이 적으면서 만족할 만한 결과를 얻을 수 있는 유용한 방법 중의 한가지로 생각된다. Purpose: We wanted to evaluate the result of percutaneous, mini-open reduction for the treatment of Mason II or III radial head and neck fractures. Materials and Methods: 13 patients (8 male, 5 female) with Mason II or III radial head and neck fractures were treated by 1 cm percutaneous mini-open reduction under fluoroscopy. The average age of our subjects was 29 years. Follow up duration was 18 months. Results: Union was noted in all cases. Mean radial neck angulation was decreased from 33.2 degrees to 7.8 degrees. The mean change in angulation between the immediate post-operative and last follow-up was 0.7 degrees. The mean range of motion at the elbow joint was at last follow up, 133.1 degrees in flexion, 7.3 degrees in extension, 80 degrees in pronation and 84.3 degrees in supination. Postoperatively, mean Mayo Elbow Performance Index, American Shoulder and Elbow Surgeons elbow score, and Disabilities of the Arm, Shoulder and Hand score were 96.2, 97 and 1.2. Temporary posterior interosseous nerve palsy (1 case) and minimal cubitus valgus deformity (1 case) were noted. Conclusion: Selected Mason II or III radial head and neck fractures can be treated satisfactorily with percutaneous mini-open reduction.
실리콘 빔이 실리콘 고무 멤브레인에 삽입된 빗살형 차압센서의 설계 및 제조
박정용(Jeong Yong Park),공성수(Sung Soo Kong),서창택(Chang Taeg Seo),신장규(Jang Kyoo Shin),고광락(Kwang Rak Koh),이종현(Jong Hyun Lee) 한국센서학회 2000 센서학회지 Vol.9 No.6
A novel differential pressure sensor has been developed with silicon beams embedded in a silicone rubber membrane. The transducer is usable for most applications involving exposure to harsh media. A piezoresistive differential pressure sensor using silicone rubber membrane has been fabricated on the selectively diffused (100)-oriented n/n+/n silicon substrates by a unique silicon micro-machining technique using porous silicon etching. The pressure sensitivity is about 0.66 μV/mmHg and the non-linearity is less than 0.1%.
Formation of Ultrathin NiSi₂Films and Heteroepitaxial Growth of epi-NiSi₂/Si(111)
CHOI,Chi Kyu,BOO, Sung Eun,KOH,Keoung Dae,HONG,Sung Rak,LEE,Jeong Yong,KIM,Sang Ki,LEE, Sang Hwan,CHO,Kyoung Ik,KIM,Kun Ho 濟州大學校 基礎科學硏究所 1994 基礎科學硏究 Vol.7 No.1
Single-crystal NiSi₂layers of either thpe-A or type-B orientation were grown on a Si(111) substrate by solidphase epitaxy. Epitaxial type-B NiSi₂was grown by deposition of Ni(<20Å) on a Si(111)-7×7surface at room temperature followed by in situ annealing at 650℃ for 20min. At a thickness of ~50Å, a layered structure of type-B NiSi₂(111)/type-A NiSi₂(111)/Si (111) was formed. Pure type-A NiSi₂layer was grown by in situ annealing the Ni(200Å)/Si(111)-7×7 sample at 750℃ for 20min. The minimum yields (X??) of Ni in 2-MeV⁴, He ion back scattering spectrometry for the type-A and type-B NiSi₂were about 4 and 10%, respecitively. The epitaxial orientations were mainly dependent on the Ni thickness and the annealing temperature. Single-crystal NiSi₂layers of either type-A or type-B orientation were grown on a Si(111) substrate by solidphase epitaxy. Epitaxial type-B NiSi₂was grown by deposition of Ni(<20Å) on a Si(111)-7×7surface at room temperature followed by in situ annealing at 650℃ for 20min. At a thickness of ~50Å, a layered structure of type-B NiSi₂(111)/type-A NiSi₂(111)/Si (111) was formed. Pure type-A NiSi₂layer was grown by in situ annealing the Ni(200Å)/Si(111)-7×7 sample at 750℃ for 20min. The minimum yields (χ???) of Ni in 2-MeV⁴, He ion backscattering spectrometry for the type-A and type-B NiSi₂were about 4 and 10%, respectively. The epitaxial orientations were mainly dependent on the Ni thickness and the annealing temperature.
Kang Nam Seon,Jo Chang Rak,Koh Young Ho,Kim Sun Young,Jeong Hyeon Gyeong 한국해양과학기술원 2024 Ocean and Polar Research Vol.46 No.4
Green algae have potential applications in various industries, such as biofuels, nutraceuticals, and pharmaceuticals, owing to their adaptability and bioactive compounds. However, the taxonomy and phylogenetic understanding of green algae are incomplete because of challenges in morphological differentiation and limited DNA sequencing. In this study, a unicellular green alga designated as Tetraselmis marina MP0060 was axenically isolated from seawater off the Dokdo Islands in Korea. The taxonomic, genetic, physiological, and biochemical properties of this strain were characterized, and its optimal growth conditions were explored. Comprehensive morphological and molecular analyses confirmed the taxonomic placement of the strain within T. marina. This strain showed robust growth across a wide temperature range (8–30°C) with optimal conditions at 21°C and 88 µmol m-2 s-1 photon flux density. It was rich in palmitic acid (41.84%) and nutritionally important ω-3 fatty acids, including α-linolenic acid (17.49%) and eicosapentaenoic acid (14.04%). This study is the first to report this species in Korea, and its findings suggest that the biomass of T. marina MP0060 can serve as a viable feedstock for biodiesel production and as a valuable source of ω-3 fatty acids.
Growth of epitaxial C54 TiSi_2 on Si(111) substrate by in situ annealing in ultrahigh vacuum
Kim, Kun Ho,Lee, Jeoung Ju,Seo, Dong Ju,Choi, Chi Kyu,Hong, Sung Rak,Koh, Jeoung Dae,Kim, Sung Chul,Lee, Jeong Yong,Nicolet, Marc A. 慶尙大學校 기초과학연구소 1992 基礎科學硏究所報 Vol.8 No.-
The growth of Ti and the formation fo epitaxial Ti silicide on Si(111)-7×7 were investigated by using reflection high-energy electron diffraction (RHEED) and high-resolution transmission electron microscopy (HRTEM). The growth mode of Ti is Stransky-Krastanov type when the substrate temperature is room temperature (RT). On the other hand, it is Volmer-Weber type when the substrate temperature is ∼550℃. The HRTEM lattice image and transmission electron diffraction pattern show that C54 TiSi_2 is grown epitaxially on a Si substrate when 160ML of Ti is deposited on a Si(111)-7×7 surface at RT followed by in situ annealing at 750℃ for 10min in ultrahigh vacuum (UHV). The TiSi_2/Si interface is somewhat incoherent, but the developed TiSi_2 crystallites are single crystal with matching face relationships of TiSi_2(111)∥Si(111), TiSi_2(311)∥Si(111), and TiSi_2(022)∥Si(111). A thin single-crystal Si overlayer with[111] direction is grown on the TiSi_2 surface when TiSi_2/Si(111) is annealed at ∼900℃ in UHV, which is confirmed by observing the Si(111)-7×7 RHEED pattern.
Eum Da-Young,Lee Chaeyoung,Tran Cong So,Lee Jinyoung,Park Soon Yong,Jeong Mi-So,Jin Yunho,Shim Jae Woong,Lee Seoung Rak,Koh Minseob,Vasileva Elena A.,Mishchenko Natalia P.,Park Seong-Joon,Choi Si Ho,C 한국독성학회 2024 Toxicological Research Vol.40 No.3
Echinochrome A (Ech A), a marine biosubstance isolated from sea urchins, is a strong antioxidant, and its clinical form, histochrome, is being used to treat several diseases, such as ophthalmic, cardiovascular, and metabolic diseases. Cancerassociated fibroblasts (CAFs) are a component of the tumor stroma and induce phenotypes related to tumor malignancy, including epithelial–mesenchymal transition (EMT) and cancer stemness, through reciprocal interactions with cancer cells. Here, we investigated whether Ech A modulates the properties of CAFs and alleviates CAF-induced lung cancer cell migration. First, we observed that the expression levels of CAF markers, Vimentin and fibroblast-activating protein (FAP), were decreased in Ech A-treated CAF-like MRC5 cells. The mRNA transcriptome analysis revealed that in MRC5 cells, the expression of genes associated with cell migration was largely modulated after Ech A treatment. In particular, the expression and secretion of cytokine and chemokine, such as IL6 and CCL2, stimulating cancer cell metastasis was reduced through the inactivation of STAT3 and Akt in MRC5 cells treated with Ech A compared to untreated MRC5 cells. Moreover, while conditioned medium from MRC5 cells enhanced the migration of non-small cell lung cancer cells, conditioned medium from MRC5 cells treated with Ech A suppressed cancer cell migration. In conclusion, we suggest that Ech A might be a potent adjuvant that increases the efficacy of cancer treatments to mitigate lung cancer progression.