http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초소형 고감도 나노 바이오 센서의 연구개발 및 시장 동향
박형기,국준원,최권영,이재현,Hyeong Gi Park,Jun-Won Kook,Kwon-Young Choi,Jae-Hyun Lee 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.6
This paper presents the development and market trends of nano biosensors. These biosensors must possess high sensitivity and selectivity to effectively detect diseases. Presently, many research groups are focusing on the field-effect transistor aspect of nano biosensors, which can identify diseases such as Down syndrome, bladder cancer, breast cancer, and numerous other cancers, utilizing graphene and transition metal dichalcogenide materials. In the case of in-vitro diagnostics, the use of nano biosensors has been rapidly growing since the onset of the COVID-19 pandemic. This paper also discusses market trends and the outlook for both national and international enterprises engaged in the nano biosensor field. Nano biosensors are expected to play a beneficial and significant role soon, contributing to the early diagnosis of diseases and subsequently improving patient outcomes.
도계의 전기실신 조건이 육계 흥육의 품질에 미치는 영향
박형기,양명호 한국축산학회 2000 한국축산학회지 Vol.42 No.1
This study was conducted to investigate the effect of electrical stunnings on bleeding rate and quality of broiler breast meat during slaughtering. Sixty broiler chicks were stunned by 0, 40 and 63 voltage with the same electrical frequency and stunning time at Halim Co. LTD. Total bleeding rate(%), bleeding rate(for the first 30 seconds) and bleeding time were recorded. Carotid or jugular veins of five broilers were manually cut and deboned in each treatment. The color value, pH, water holding capacity(WHC) and VBN were measured at 0, 2 and 3 days after storage at 4±1℃. Chicks treated with 65V, 255㎐, 15s showed the highest total bleeding rate(3.89±0.06%) and bleeding rate after 30s(79.84±0.80%) of all treatments. Lightness(L-value) and yellowness(b-value) of the color value were also significantly higher under the slaughtering of 65V, 255㎐, 15s than those of other treatments(P$lt;0.05). In contrast, redness(a-value) was the highest in non-stunning groups. After 3 days storage, pH and WHC of breast meat treated with 65V, 255㎐, 15s was higher than those of other treatments, whereas VBN was significantly lower compared to that of other treatments(P$lt;0.05). The results of this experiment confirmed that broiler chicks treated with 65V, 255㎐, 15s maximized bleeding rate and indicated that most blood was removed at the beginning of bleeding. The breast meat of this treatment also exhibited highest lightness(L-value) and yellowness(b-value) of color value. Thus, bleeding rate would be related with bleeding time, color value, pH, WHC and VBN.
폴리우레탄 스프링 복원형 디스크 받침의 동적거동에 대한 실험 및 해석적 연구
박형기,이유인,정대유 한국지진공학회 2011 한국지진공학회논문집 Vol.15 No.2
이 논문에서는 근래에 널리 사용되는 면진 장치인 폴리우레탄 스프링 복원형 디스크 받침의 동적거동에 영향을 미치는 구성재료의 인자에 대한 분석을 수행한 후, 그 결과를 이용하여 받침의 거동을 예측하여 거동 시험결과와 비교하였다. 여기서 동적거동에 영향을 미치는 인자로는 속도와 접촉압력에 따라 변하는 불소수지판(PTFE, PolyTetraFluoroEthylene, 폴리테트라플루오로에틸렌)의 마찰계수와 변형률에 따라 변화하는 폴리우레탄 스프링의 탄성계수가 고려되었다. 불소수지판은 W-PTFE virgin 제품을 사용하였고, 폴리우레탄 스프링은 직접 제작한 것을 사용하였다. 접촉압력, 속도에 따른 마찰계수 변화와 변형률에 따라 변하는 폴리우레탄 스프링의 탄성계수를 모사하는 식은 각각의 시험결과로부터 역추정 하여 사용하였다. 동특성 영향인자를 고려한 거동의 예측 결과는 동특성이 고려되지 않고 정적 인자만을 고려한 예측 결과보다 시험결과와 더 적절한 일치성을 보여주었다. In this paper, the factors affecting the dynamic characteristics of a polyurethane spring restoring disk bearing are analysed to predict the dynamic behavior of the bearing. The prediction results and the test results are compared. The Young's modulus of the polyurethane spring, which varies according to strain of spring and the friction coefficient, of PTFE (PolyTetraFluoroEthylene), which varies according to the velocity and pressure of PTFE, are considered as the factors influencing the dynamic characteristics. W-PTFE virgin products are used and polyurethane springs are produced for the tests. The equation related to changing the friction coefficient and the modulus of elasticity are obtained through an inverse estimation of the test results. The estimation results, considering the factors affecting the dynamic characteristics, simulate the test results more appropriately than the estimation without the consideration of those factors.
Review of Stereotactic Radiosurgery for Intramedullary Spinal Lesions
박형기,장재칠 대한척추신경외과학회 2013 Neurospine Vol.10 No.1
Stereotactic radiosurgery (SR) represents an increasingly utilized modality in the treatment of intracranial and extracranial pathologies. Stereotactic spine radiosurgery (SSR) uses an alternative strategy to increase the probability of local control by delivering large cumulative doses of radiation therapy (RT) in only a few fractions. SSR in the treatment of intramedullary lesions remains in its infancy - this review summarizes the current literature regarding the use of SSR for treating intramedullary spinal lesions. Several studies have suggested that SSR should be guided by the principles of intracranial radiosurgery with radiation doses placed no further than 1-2mm apart, thereby minimizing exposure to the surrounding spinal cord and allowing for delivery of higher radiation doses to target areas. Maximum dose-volume relationships and single-point doses with SSR for the spinal cord are currently under debate. Prior reports of SR for intramedullary metastases, arteriovenous malformations, ependymomas, and hemangioblastomas demonstrated favorable outcomes. In the management of intrame- dullary spinal lesions, SSR appears to provide an effective and safe treatment compared to conventional RT. SSR should likely be utilized for select patient-scenarios given the potential for radiation-induced myelopathy, though high-quality literature on SSR for intramedullary lesions remains limited.