• Asian Pacific Journal of Cancer Prevention
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• 제16권13호
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• pp.5541-5547
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• 2015

Background: The role of surgical resection for patients with single large (${\geq}5cm$) and/or multinodular (${\geq}2$) hepatocellular carcinoma (HCC) is still controversial. This systematic review was performed to evaluate the safety and efficacy of resection for patients with single large and/or multinodular HCC. Materials and Methods: Databases (the PubMed, Web of Science, Embase, and Cochrane databases) were systematically searched to identify relevant studies exploring the safety and efficacy of resection for single large and/or multinodular HCC, published between January 2000 and December 2014. Perioperative morbidity and mortality, overall survival, and disease-free survival of the resection group were calculated. In addition, these outcome variables were also calculated for the control group in the included studies. Results: One randomized controlled trial and 42 nonrandomized studies involving 9,580 patients were eligible for analysis. Eight (1,594 patients) of the 43 studies also reported the outcomes of transarterial chemoembolization (TACE). Although 51.4% of patients featured cirrhosis, 90.7% of them demonstrated Child-Pugh A liver function in the resection group. The median rates of morbidity (24.5%) and mortality (2.5%) after resection were significantly higher than that of TACE (11.0%, P<0.001; 1.9%, P<0.001). However, patients who underwent resection had significantly higher median one-, three-, and five-year overall survival (76.1%, 51.7%, and 37.4%) than those who underwent TACE (68.3%, 31.5%, and 17.5%, all P<0.001). The median 1-, 3-, and 5-year DFS rates after resection were 58.3%, 34.6%, and 24.0%, respectively. Conclusions: Although tumor recurrence after resection for patients with single large and/ or multinodular HCC continues to be a major problem, resection should be considered as a strategy to achieve long-term survival.

• 한국의학물리학회지:의학물리
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• 제29권2호
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• pp.59-65
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• 2018

This paper describes the clinical use of the dose verification of multileaf collimator (MLC)-based CyberKnife plans by combining the Octavius 1000SRS detector and water-equivalent RW3 slab phantom. The slab phantom consists of 14 plates, each with a thickness of 10 mm. One plate was modified to support tracking by inserting 14 custom-made fiducials on surface holes positioned at the outer region of $10{\times}10cm^2$. The fiducial-inserted plate was placed on the 1000SRS detector and three plates were additionally stacked up to build the reference depth. Below the detector, 10 plates were placed to avoid longer delivery times caused by proximity detection program alerts. The cross-calibration factor prior to phantom delivery was obtained by performing with 200 monitor units (MU) on the field size of $95{\times}92.5mm^2$. After irradiation, the measured dose distribution of the coronal plane was compared with the dose distribution calculated by the MultiPlan treatment planning system. The results were assessed by comparing the absolute dose at the center point of 1000SRS and the 3-D Gamma (${\gamma}$) index using 220 patient-specific quality assurance (QA). The discrepancy between measured and calculated doses at the center point of 1000SRS detector ranged from -3.9% to 8.2%. In the dosimetric comparison using 3-D ${\gamma}$-function (3%/3 mm criteria), the mean passing rates with ${\gamma}$-parameter ${\leq}1$ were $97.4%{\pm}2.4%$. The combination of the 1000SRS detector and RW3 slab phantom can be utilized for dosimetry validation of patient-specific QA in the CyberKnife MLC system, which made it possible to measure absolute dose distributions regardless of tracking mode.

• 한국산림과학회지
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• 제89권1호
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• pp.126-134
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• 2000

본 연구는 문화재용 목재의 수급 및 유통 실태를 파악하는데 목적을 두었다. 문화재용 목재는 문화성, 공공성, 고품질성이라는 특성을 갖고 있으며, 이 특성으로 인해 일반용재에 비해 매우 높은 가격에 거래되고 있다. '98년 문화재용 목재 수요는 약 1.8만$m^3$이며, 그 중 특수재 및 특대재는 총 수요의 35.5%인 6.3천 $m^3$로 추정되었다. 문화재용 목재공급은 주로 국유림(16.7%) 및 강원도 민유림(65.7%)에서 생산된 것으로 추정되며, 최근 강원도로 집중되는 경향을 보였다. 그러나 소나무 대경목의 자원 부족으로 문화재 수리 시 외재가 일부 대체목으로 사용되고 있다. 또한 문화재수리업자는 문화재용 목재수요는 증가할 것이나 대경재 공급은 어려울 것으로 인식하고 있었다. 결국 문화재용 목재수급을 통한 목조건축문화재의 전통을 계승하기 위해서는 소나무 대경재 생산을 목표로 한 산림경영계획이 절실히 필요하다고 할 수 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제31권4호
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• pp.529-536
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• 2018

Objective: Fresh sugarcane has been a new roughage source for ruminant's in semiarid regions, a function of the decline of sugar and alcohol industry in recent years. However, there is little data published regarding lambs fed sugarcane associated with spineless cactus. This study evaluated the effect of sugarcane replacement with spineless cactus (0%, 33%, 66%, and 100%) in the diet of Santa $In\hat{e}s$ lambs on carcass characteristics. Methods: Thirty-six non-castrated Santa Ines lambs at four months of age and an initial body weight of $22{\pm}2.3kg$ were assigned in a randomized block design and slaughtered after 70 days of confinement. The effects of spineless cactus as a replacement for sugarcane in the diet of the lambs on the carcass characteristics, commercial cut weight and yield, leg tissue composition, and carcass measurements were studied. Results: The study revealed quadratic behavior in slaughter body weight, and hot and cold carcass weight, with maximum values of 38.60, 18.60, and 18.11 kg and replacement levels of 40.18%, 44.42%, and 43.14%, respectively. The cold carcass yield presented an increasing linear behavior. The compactness index of carcass and leg presented a quadratic effect, with estimated maximal values of 0.28 and 0.57 kg/cm and replacement levels of 43.37% and 45.5%, respectively. The weights of commercial cuts of leg, loin, shoulder, and breast showed quadratic behavior, with maximum values of 2.79, 0.852, 1.46, and 1.30 kg and replacement levels of 49.5, 45.32, 39.0, and 40.7, respectively. For tissue composition, quadratic behavior was verified for leg weight, subcutaneous fat, and total fat. Conclusion: The replacement of sugarcane by spineless cactus at level 44% is recommended for finishing lambs considering that this level improved most of the carcass characteristics, weights, and yields of commercial cuts and leg tissue composition.

• Asian-Australasian Journal of Animal Sciences
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• 제30권10호
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• pp.1396-1404
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• 2017

Objective: This study was determined the influence of virginiamycin supplementation on growth-performance and characteristics of digestion of cattle with decreasing dietary net energy value of the diet for maintenance ($NE_m$) from 2.22 to 2.10 Mcal/kg. Methods: Eighty crossbred beef steers ($298.2{\pm}6.3kg$) were used in a 152-d performance evaluation consisting of a 28-d adaptation period followed by a 124-d growing-finishing period. During the 124-d period steers were fed either a lesser energy dense (LED, $2.10Mcal/kg\;NE_m$) or higher energy dense (HED, $2.22Mcal/kg\;NE_m$) diet. Diets were fed with or without 28 mg/kg (dry matter [DM] basis) virginiamycin in a $2{\times}2$ factorial arrangement. Four Holstein steers ($170.4{\pm}5.6kg$) with cannulas in the rumen (3.8 cm internal diameter) and proximal duodenum were used in $4{\times}4$ Latin square experiment to study treatment effects on characteristics of digestion. Results: Neither diet energy density nor virginiamycin affected average daily gain (p>0.10). As expected, dry matter intake and gain efficiency were greater (p<0.01) for LED- than for HED-fed steers. Virginiamycin did not affect estimated net energy value of the LED diet. Virginiamycin increased estimated NE of the HED diet. During daylight hours when the temperature humidity index averaged $81.3{\pm}2.7$, virginiamycin decreased (p<0.05) ruminal temperature. Virginiamycin did not influence (p>0.10) ruminal or total tract digestion. Ruminal (p = 0.02) and total tract digestion (p<0.01) of organic matter, and digestible energy (p<0.01) were greater for HED vs LED. Ruminal microbial efficiency was lower (p<0.01) for HED vs LED diets. Conclusion: The positive effect of virginiamycin on growth performance of cattle is due to increased efficiency of energy utilization, as effects of virginiamycin on characteristics of digestion were not appreciable. Under conditions of high ambient temperature virginiamycin may reduce body temperature.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.363-363
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• 2014

Ruthenium (Ru) has attractive material properties due to its promising characteristics such as a low resistivity ($7.1{\mu}{\Omega}{\cdot}cm$ in the bulk), a high work function of 4.7 eV, and feasibility for the dry etch process. These properties make Ru films appropriate for various applications in the state-of-art semiconductor device technologies. Thus, it has been widely investigated as an electrode for capacitor in the dynamic random access memory (DRAM), a metal gate for metal-oxide semiconductor field effect transistor (MOSFET), and a seed layer for Cu metallization. Due to the continuous shrinkage of microelectronic devices, better deposition processes for Ru thin films are critically required with excellent step coverages in high aspect ratio (AR) structures. In these respects, atomic layer deposition (ALD) is a viable solution for preparing Ru thin films because it enables atomic-scale control of the film thickness with excellent conformality. A recent investigation reported that the nucleation of ALD-Ru film was enhanced considerably by using a zero-valent metallorganic precursor, compared to the utilization of precursors with higher metal valences. In this study, we will present our research results on the synthesis and characterization of novel ruthenium complexes. The ruthenium compounds were easy synthesized by the reaction of ruthenium halide with appropriate organic ligands in protic solvent, and characterized by NMR, elemental analysis and thermogravimetric analysis. The molecular structures of the complexes were studied by single crystal diffraction. ALD of Ru film was demonstrated using the new Ru metallorganic precursor and O2 as the Ru source and reactant, respectively, at the deposition temperatures of $300-350^{\circ}C$. Self-limited reaction behavior was observed as increasing Ru precursor and O2 pulse time, suggesting that newly developed Ru precursor is applicable for ALD process. Detailed discussions on the chemical and structural properties of Ru thin films as well as its growth behavior using new Ru precursor will be also presented.

• 대한의용생체공학회:의공학회지
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• 제23권3호
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• pp.189-196
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• 2002

피부를 통한 약물 전달 방법은 국소 병변 부에 직접적으로 약물을 전달할 수 있는 장점을 가졌으나 피부의 가장 바깥 층인 각질층의 장벽기능으로 인해 약물 전달 능력에 제한이 있다. 본 연구에서는 산소 압력 방법과 초음파 방법을 결합하는 방법을 시도하여 약물 전달 능력의 향상 정도를 검증해 본다. 흡수 물질로는 수분을 사용하였고 수분의 흡수도를 측정하기 위해 피부 임피던스 방법을 선택하였다. 실험은 총 42명을 대상으로 각각 대조군(13명) 초음파군(13명), 산소 압력군(6명). 초음파와 산소압력 결합군(10명)으로 나누어서 시행하였다. 각 군마다 다른 약물 전달방법을 손등 부위에 적용하여 20분간 피부 임피던스 변화를 측정 한 값을 PC에 저장하였다. 수분을 적용한 대조군의 경우 피부 임피던스의 변화가 거의 일어나지 않고. 초음파를 적용한 군과 산소를 적용한 군은 수분을 적용한 군보다 25-30배정도 높은 수분 홉수를 보였으며. 초음파와 산소 압력을 결합한 방법은 수분을 적용한 군보다 70배정도 높은 수분 흡수를 보였다. 이러한 평균의 타이를 반복 측정된 분산방법(Repeated Measures Analysis of Variance)의 다변량 검증과 다중비교를 통해 변화량간의 차이를 검증하여 유의성을 확인하였다

• Archives of Plastic Surgery
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• 제36권4호
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• pp.411-416
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• 2009

Purpose: Malignant melanoma is recognized as the most serious skin cancer. We examined anatomical distribution and 5 - year survival rate of each stage of malignant melanoma on lower leg. Methods: We retrospectively analyzed the medical records of 91 patients(46 males and 45 females) with malignant melanoma on lower leg from 1985 to 2008. Age, sex, anatomical distribution and 5 - year survival rates of each stage of malignant melanoma on lower leg were investigated. Also, 5 - year survival rates of each stage and invasion depth of malignant melanoma on heel pad were investigated. Results: On lower leg, most frequently 32 cases(35.1%) occurred on heel pad, 27 cases(29.7%) occurred on dorsum of foot, 18 cases(19.8%) in toe and 14 cases(15.4%) on others in lower leg. We used the excision margin as 3 ~ 5 cm. After wide excision, in stage III, IV, the patients underwent the immunologic / chemo - therapy. The incidences of each stage were 22 cases(24.2%) in stage I, 47(51.6%) in II, 17(18.7%) in III and 5(5.5%) in IV. The 5 - year survival rates of each stage were 85%, 53.2%, 47.1% and 40%. On heel pad, the incidences of each stage were 5 cases(15.6%) in stage I, 19 cases(59.4%) in II, 7 cases(21.9%) in III and 1 case(3.1%) in IV. The 5 - year survival rates of each stage were 80%, 63.2%, 42.9% and 100%. On heel pad, incidence of local recurrence was 2 and 5 - year survival rate of this case was 100%. And systemic recurrence was 9 and 5 - year survival rate of this case was 55.6%. Conclusion: The 5 - year survival rate of malignant melanoma on heel pad was higher than previous study. To maintain the weight - bearing function of foot, we recommend the active reconstructive surgery for heel pad reconstruction after wide excision of heel pad malignant melanoma.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.205-211
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• 1998

저자들은 상완골 근위부의 골절탈구로 일차성 견관절 반치환술로 치료받은 환자 25례중 14례를 대상으로 치료결과를 분석하여 다음과 같은 결론을 얻었다. 1. 전례에서 동통은 소실되거나 완화되었으나 Neer의 평가에 따라 총 14례중 5례에서만 만족할만 한 결과를 믿었으며 나머지 9례에서는 불만족한 결과를 보였다. 2. 수상시 상완곤두의 분쇄상이 심하거나, 수술이 지연되어 골편치 연화가 심한 경우 상완골 길이와 humeral offset의 유지가 힘들었으며, 견관절 반치환술 시팽한 측이 정상측보다 1cm 이상 단축을 보인 경우가 5례였으며 이 경우 능동적 견관절 운동범위가 정상측보다 감소되었다. 3. 견관절 반치환술은 분쇄상 상완골 근위부 골절에서 사용되어지며 동통의 감소와 기능의 호전은 있으나 완전한 회복은 어려우며 수술시 연부조직 손상이 적고 적당한 후염각, 결절의 재건 과 회전근개의 수복은 필수적이다. humeral offset과 길이의 유지는 술 후 능동적 견관절 운동 범위의 향상에 영향을 미치며 아울러 환자의 협조하에 체계적인 재활운동이 필요할 것으로 사료된다.

• Journal of Plant Biotechnology
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• 제29권2호
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• pp.99-104
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• 2002

Suppression subtractive hybridization (SSH)를 통해 저온에 의해 발현이 유도되는 cDNA들을 분리하였고, 그 중 하나인 slti182는 asparaginase 유전자들과 높은 유사성을 보였다. Slti182의 전체 cDNA인 GmASP1은 1258 bp 길이에 326개 아미노산으로 구성된 긴 Open reading frame (ORF)를 포함하고 있었다. GmASP1 단백질은 애기장대의 putative asparaginase (AB012247)와 84%의 유사성을 보였으나, 애기장대의 다른 isoform(Z34884)와는 55%의 유사성을 나타내었다. GmASP1 유전자는 저온 처리 후 3시간째부터 발현이 유도되어 6시간째에 최대발현을 나타내었고, 이후 점차 감소하여 48시간에는 저온처리전 수준으로 되돌아왔다. 또한, 식물체를 저온에서 48시간 둔 후에 다시 상온으로 옮겼을 때, 정상수준으로 떨어진 GmASP1의 발현이 다시 증가하는 양상을 보였다. 이러한 결과로 볼 때, GmASP1이 저온 스트레스에 반응 초기의 단백질 합성 촉진에 중요한 역할을 할 것으로 사료된다.