• 제목/요약/키워드: Bps

검색결과 373건 처리시간 0.031초

Implant failure associated with oral bisphosphonate-related osteonecrosis of the jaw

  • Shin, Eun-Young;Kwon, Young-Hyuk;Herr, Yeek;Shin, Seung-Il;Chung, Jong-Hyuk
    • Journal of Periodontal and Implant Science
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    • 제40권2호
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    • pp.90-95
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    • 2010
  • Purpose: The aim of this study is to report a case of oral bisphosphonate-related osteonecrosis of the jaw (BRONJ) resulting in implant failure. Methods: A patient suspected of having BRONJ was referred to the Department of Periodontology, Kyung Hee University School of Dentistry for the evaluation and treatment of exposed bone around implants. Results: The patient, who had been taking oral bisphosphonates (BPs) for about a year, was successfully treated with systemic antibiotics, chlorhexidine mouth rinse, explantation, and surgical debridement of necrotic bone. Conclusions: The results of this case suggest that a patient taking BPs orally should be treated cautiously. Appropriate management including cessation of BPs and respective dental treatment may reduce the development of BRONJ.

Bronchopulmonary Sequestration with Dual Arterial Supply from Celiac Artery and Thoracic Aorta

  • Kim, Won-Hak;Jeong, So-Hee;Ha, Kyung-Won;Lee, Woo-Sung;Kim, Dong-Chan;Chon, Gyu-Rak
    • Tuberculosis and Respiratory Diseases
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    • 제68권2호
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    • pp.101-104
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    • 2010
  • Bronchopulmonary sequestration (BPS) is a rare congenital malformation of the lower respiratory tract. Most intralobar BPSs are provided with an arterial blood via the thoracic or abdominal aorta but such a supply is rarely found in patients older than 50 years. We report a case of an intralobar BPS with a dual arterial supply from the celiac artery and thoracic aorta in a 50-year-old man presenting with a respiratory tract infection and haemoptysis. To our knowledge, this is the first case report of a BPS supplied by the celiac artery and thoracic aorta in a 50-year-old man.

Endocrine Disruption Potentials of Bisphenol A Alternatives - Are Bisphenol A Alternatives Safe from Endocrine Disruption?

  • Ji, Kyunghee;Choi, Kyungho
    • 한국환경보건학회지
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    • 제39권1호
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    • pp.1-18
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    • 2013
  • Objectives: Although a great body of knowledge is available on the toxicity of bisphenol A (BPA), little is known about that of BPA alternatives, such as bisphenol analogues (BPs) or $Tritan^{TM}$ copolyesters. This review provides a summary of the available information on the toxicity of BPs and three components of $Tritan^{TM}$, with a special focus on endocrine disruption. Methods: We collected from the literature a battery of in vitro and in vivo assay data developed to assess endocrine disruption of four BPs (bisphenol AF, B, F, and S) and three major components of $Tritan^{TM}$ ((di-methylterephthalate (DMT), 1,4-cyclohexanedimethanol (CHDM), and 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD)). Results: Several alternative compounds were identified as possessing comparable or even greater endocrinedisrupting effects than BPA in in vitro and in vivo studies. Conclusions: Potential endocrine disruption of BPA alternatives requires further studies on health consequences in experimental animals and in humans following longer term exposure.

GC-MS 를 이용한 하천수 중 Bisphenol계 화합물의 동시분석 및 모니터링 (Simultaneous Determination and Monitoring of Bisphenols in River Water using Gas Chromatography-Mass Spectrometry)

  • 김지현;최정희;강태우;강태구;황순홍;심재한
    • 한국환경농학회지
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    • 제36권3호
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    • pp.154-160
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    • 2017
  • 본 연구는 하천수 중 bisphenol계 화합물 종 6 (BPA, BPB, BPC, BPE, BPF, BPS)을 동시분석하기 위하여 GC-MS를 이용하였다. 또한 최적의 전처리 방법을 확립하고자 SPE 및 LLE법을 이용하여 표준시료로부터 검량선의 직선성, MDL, LOQ, 정확도 및 정밀도를 비교하였다. SPE 및 LLE 전처리 방법에 의한 MDL은 각각 $0.0005{\sim}0.0234{\mu}g/L$$0.0037{\sim}0.2034{\mu}g/L$, LOQ는 각각 $0.0015{\sim}0.0744{\mu}g/L$$0.0117{\sim}0.6477{\mu}g/L$, 검량선의 결정계수($r^2$)는 모두 0.9969이상 정확도는 각각 93.2~108%와 97.4~120%, 정밀도는 각각 1.7~4.6%와 0.7~6.5%범위로 만족한 정도관리 결과를 얻었다. 하지만 SPE법에 의한 MDL 및 LOQ 값은 LLE법보다 약 4~45배 정도 높은 감도를 보였고, 특히 BPA의 경우는 다른 화합물들보다 45배 정도 높았다. 따라서, 본 연구에서는 SPE법을 적용하여 하천수 시료를 분석하였고, 조사지점은 본류 7개, 지류 6개, 하수종말처리장 2개 지점을 선정하였다. Bisphenol계 화합물 중에서 BPB, BPC, BPE, BPF 및 BPS는 모두 불검출 되었으나, BPA 농도는 $0.0095{\sim}0.2583{\mu}g/L$ 범위로 본류 $0.0166{\sim}0.0810{\mu}g/L$, 지류 $0.0095{\sim}0.2583{\mu}g/L$, 하수종말처리장$0.0352{\sim}0.1217{\mu}g/L$으로 미량 수준이었다.

해가림자재 종류별 고려인삼의 생육과 품질특성 비교 (Comparison of Growth Characteristics and Quality of Korean Ginseng (Panax ginseng C.A. Meyer) by Different Shade Materials)

  • 성봉재;이가순;한승호;김선익;김관후;이석수;원준연;서정덕;조진웅
    • 한국작물학회지
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    • 제59권4호
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    • pp.505-510
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    • 2014
  • 고품질 우량인삼 생산을 위한 해가림자재별 인삼의 생육상황과 해가림 아래의 미기상 변화를 조사하였고, 각각의 해가림자재에서 생산된 수삼의 유효성분들을 조사 분석한 결과, 6~8월까지의 해가림자재별로 온도는 차광지>차광판>차광지 순이었고, 투광량도 차광지가 8월에 $381.7{\mu}mol/s/m^2$로 인삼포내 온도가 가장 높은 원인이었다. 2~3년 인삼의 지상부 생육은 차광망>차광판>차광지 순이었으며, 4년근은 차광판=차광지>차광망 순으로 좋았다. 4년근 인삼의 진세노사이드 총함량은 차광판>차광지>차광망 순으로 많았으며, 수삼의 색도는 차광망>차광판>차광지 순으로 높았다.

Development and Evaluation of Natural Hydroxyapatite Ceramics Produced by the Heat Treatment of Pig Bones

  • Lim, Ki-Taek;Kim, Jin-Woo;Kim, Jangho;Chung, Jong Hoon
    • Journal of Biosystems Engineering
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    • 제39권3호
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    • pp.227-234
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    • 2014
  • Purpose: The aim of this research was to develop and evaluate natural hydroxyapatite (HA) ceramics produced from the heat treatment of pig bones. Methods: The properties of natural HA ceramics produced from pig bones were assessed in two parts. Firstly, the raw materials were characterized. A temperature of $1,200^{\circ}C$ was chosen as the calcination temperature. Fine bone powders (BPs) were produced via calcinations and a milling process. Sintered BPs were then characterized using field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, and a 2-year in vitro degradability test. Secondly, an indirect cytotoxicity test was conducted on human osteoblast-like cells, MG63, treated with the BPs. Results: The average particle size of the BPs was $20{\pm}5{\mu}m$. FE-SEM showed a non-uniform distribution of the particle size. The phase obtained from XRD analysis confirmed the structure of HA. Elemental analysis using XRF detected phosphorus (P) and calcium (Ca) with the Ca/P ratio of 1.6. Functional groups examined by FTIR detected phosphate ($PO{_4}^{3-}$), hydroxyl ($OH^-$), and carbonate ($CO{_3}^{2-}$). The EDX, XRF, and FTIR analysis of BPs indicated the absence of organic compounds, which were completely removed after annealing at $1,200^{\circ}C$. The BPs were mostly stable in a simulated body fluid (SBF) solution for 2 years. An indirect cytotoxicity test on natural HA ceramics showed no threat to the cells. Conclusions: In conclusion, the sintering temperature of $1,200^{\circ}C$ affected the microstructure, phase, and biological characteristics of natural HA ceramics consisting of calcium phosphate. The Ca-P-based natural ceramics are bioactive materials with good biocompatibility; our results indicate that the prepared HA ceramics have great potential for agricultural and biological applications.

이중구조 가연성독봉 설계안의 최적화 및 노심 핵설계 타당성 평가 (Design Optimization of Duplex Burnable Poison Rods and Feasibility Evaluation for Core Design)

  • 윤석균;이대진;김명현
    • 에너지공학
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    • 제13권4호
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    • pp.242-258
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    • 2004
  • 한국원자력연구소에서는 기존의 일체형 가연성 독봉과 다른 이중구조로 된 가연성독봉 개념을 제시하였다. 이중구조 가연성독봉(Erbia Duplex BP)은 내부에 Natural U+Gd$_2$O$_3$, 외부에는 Enriched $UO_2$+Er$_2$O$_3$를 배열시킨 구조이다. 이러한 독봉은 장주기 노심에서 기존의 Gadolinia BP과 동일한 반응도제어를 할 수 있을 것이라 예상된다. 이중구조 가연성독봉의 핵적 타당성을 확인하기 위해 24개월 주기용 한국표준형원자로를 비교대상으로 선정하였으며, 기존 연구된 여러 가지 독봉설계안들과 4가지 핵특성에 대하여 비교 분석하였다. 핵특성 평가 결과, 이중구조가연성 독봉은 비교대상보다 무한증배계수, 첨두봉출력인자, 반응도억제가, 감속재온도계수측면에서 모두 유리한 경향을 보였다. 설계변수에 따른 민감도분석을 통해 도출한 최적화된 핵연료집합체를 이용하여 노심적용 타당성을 확인하였다. 주기길이, 첨두출력 및 감속재온도 계수를 비교하였으며 전 노심해석결과 주기길이가 비고대상보다 4-7일 길게 나타났다. 이러한 결과는 등가의 독봉집합체를 설계했음에도 불구하고 노심에 장전되는 우라늄의 양이 서로 달라서 생기는 현상으로 판단된다. 하지만 전체적인 핵특성을 비교해보면 이중구조 가연성독봉을 장전한 노심이 비교대상노심보다 다소 유리하면서도 거의 비슷함을 알 수 있었다. 마지막으로 경제성 평가를 통해 장주기 노심에서의 이중구조 가연성독봉의 제조 가능성 및 적용 타당성이 충분히 확인되었다.

V.22bis MODEM CHIP 기술동향

  • 장동원;황건;최태구;이대기
    • 전자통신동향분석
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    • 제4권4호
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    • pp.108-134
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    • 1989
  • 본 고는 현재 공중회선망을 이용한 PC 통신에 필수장비인 모뎀을 구성하는 2,400bps Modem Chip Set을 비교하였다. 현재 널리 사용되는 Modem Chip Set들은 주로 2-3개 Chip으로 구성되며, 이것들을 사용하여 완전한 2,400bps Modem을 구성할 수 있다. 이러한 모뎀용 IC는 PC통신뿐만 아니라 휴대용 Terminal, 차량추적시스팀, 휴대용 전화기, 각종 원격검침계량기 등에서와 같이 그 사용범위가 다양화되고 있는 추세이다.

Analyses of Crypto Module for Gbps VPN System

  • Kim, Jung-Tae;Han, Jong-Wook
    • Journal of information and communication convergence engineering
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    • 제1권4호
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    • pp.213-216
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    • 2003
  • A VPN is widely used in a communications environment which access is controlled to permit peer connections only within a defined community of interest. It is constructed through some form of partitioning of a common underlying communication medium, where this underlying communications medium provides services to the network on a non-exclusive basis. In this paper, we have analyzed a variety of architecture to implement Giga bps VPN system. The proposed architecture will satisfy the needs of clients who adopt Giga bps VPN system in the various environments.

Analyses of Architecture based on Hardware for High-speed VPN System

  • Kim Jung-Tae
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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    • pp.321-324
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    • 2004
  • A VPN is widely used in a communications environment which access is controlled to permit peer connections only within a defined community of interest. It is constructed through some form of partitioning of a common underlying communication medium, where this underlying communications medium provides services to the network on a non-exclusive basis. In this paper, we have analyzed a variety of architecture to implement Giga bps VPN system. The proposed architecture will satisfy the needs of clients who adopt Giga bps VPN system in the various environments.

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