• Title/Summary/Keyword: Insertion reaction

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Impaction of a continuous glucose monitoring sensor

  • Park, Kyong Chan;Choi, Hwan Jun
    • Archives of Plastic Surgery
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    • v.48 no.4
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    • pp.392-394
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    • 2021
  • A 33-year-old man presented to the plastic surgery department for foreign body removal 1 month after the insertion of a continuous glucose monitoring (CGM) sensor (Dexcom G5) in the left upper arm. The patient had used the CGM system for 5 years, and the insertion was done in the usual manner. The entire sensor wire was visible on simple radiography and ultrasonography. In the operating room, and the sensor wire was identified in the intermuscular septum and removed. No foreign body reaction or inflammatory signs were found around the CGM, and the extracted wire measured 2.5 cm. Thus, it was assumed that the whole sensor wire was detached from the transmitter, not fractured. No remnant foreign body was observed on follow-up simple radiography.

Conceptual Safety Design Analyses of Korea Advanced Liquid Metal Reactor

  • Suk, S.D.;Park, C.K.
    • Nuclear Engineering and Technology
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    • v.31 no.6
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    • pp.66-82
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    • 1999
  • The national long-term R&D program, updated in 1997, requires Korea Atomic Energy Research Institute(KAERI) to complete by the year 2006 the basic design of Korea Advanced Liquid Metal Reactor(KALIMER), along with supporting R&D work, with the capability of resolving the issue of spent fuel storage as well as with significantly enhanced safety. KALIMER is a 150 MWe pool-type sodium cooled prototype reactor that uses metallic fuel. The conceptual design is currently under way to establish a self-consistent design meeting a set of major safety design requirements for accident prevention. Some of the current emphasis includes those for inherent and passive means of negative reactivity insertion and decay heat removal, high shutdown reliability, prevention of and protection from sodium chemical reaction, and high seismic margin, among others. All of these requirements affect the reactor design significantly and involve extensive supporting R&D programs. This paper summarizes some of the results of conceptual engineering and design analyses performed for the safety of HAMMER in the area of inherent safety, passive decay heat removal, sodium water reaction, and seismic isolation.

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Delayed Foreign Body Reaction around the Absorbable Implants in Facial Bone Fracture: A Case Report (안면부 골절에 사용된 흡수성 보형물의 지연성 이물반응: 증례보고)

  • Suh, Yong-Hoon;Kim, Young-Joon
    • Archives of Plastic Surgery
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    • v.38 no.6
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    • pp.875-878
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    • 2011
  • Purpose: Absorbable implants are frequently used to fix facial bone fractures, because they are radiolucent and compatible with magnetic resonance imaging (MRI). Despite their increasing usage, however, there have been few reports about their long-term side-effects. In this paper, a case in which absorbable implants led to a foreign body reaction 17 months after their insertion is presented. Methods: A previously healthy 19-year-old male fell from a flight of stairs and visited the authors' hospital with right periorbital pain. Zygomaticomaxillary fracture involving right orbital floor was detected via a facial bone computed tomography (CT). Internal fixation with absorbable implants was followed by open reduction. 17 months after the surgery, the patient complained of localized periorbital swelling. Removal of the granulomatous lesion including the absorbable implants along with their biopsy and culture was performed. Results: The granulomatous lesion around the implants was firm and extended into the maxillary sinus. The histologic finding showed a microabscess with a foreign body reaction. Methicillin-sensitive Staphylococcus aureus growth was confirmed in the culture. No definite abnormal symptoms ensued after the complete removal. Conclusion: A microabscess-forming granulomatous lesion around the absorbable implant can cause delayed symptomatic foreign body reaction despite its rare occurrence. Complete removal of the lesion including implants is expected to have a successful outcome if it is encountered.

A study on the ground reaction forces and plantar pressure variables in different safety shoes and applying insole during walking (안전화 형태와 Insole 착용 유무에 따른 보행동작시 하지부위에 대한 지면반발력과 압력분포 부하)

  • Kim, Jung-Jin;Choi, Sang-Bock;Cha, Sang-Eun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.17 no.2
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    • pp.131-143
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    • 2007
  • The purpose of this study was to compare the ground reaction forces and plantar pressure variables among three different safety shoes (Type 1: ergonomically designed and high quality shoes, 2: curved and cushioned safety hoes, and 3: regular safety shoes) and to find the effect of insole during walking. Ten healthy subjects were recruited for this study. The ground reaction force was measured using a 3 dimensional motion analysis system. Plantar pressures were measured Pedar Mobile foot pressure scan system. The ground reaction force variables were not significantly different among three different shoe types and insole conditions. After insertion insole, plantar pressure distributions were improved. These results suggest that the type 1 safety shoes was superior than other safety shoes in the statistics, and applying insole could be a possible method to prevent fatigue of lower extremity and musculoskeletal disorders. Further studies are needed to find the effect of ergonomically designed safety shoes design and insole on practical value prevention of musculoskeletal disorder, fatigue and satisfaction of workers.

Identification of Genes for Growth with Oxygen in Escherichia coli by Operon Fusion and Southern Blot Techniques

  • Kim, Il-Man;Lee, Yong-Chan;Won, Jae-Seon;Choe, Mu-Hyeon
    • Journal of Microbiology and Biotechnology
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    • v.13 no.6
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    • pp.976-983
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    • 2003
  • Seven Escherichia coli cells defective with aerobic growth were isolated by the insertion of ${\lambda}placMu53$, a hybrid bacteriophage of ${\lambda}$ and Mu, which created a transcriptional fusion to lacZY. These insertion mutant cells were tested on an XG ($5-bromo-4-chloro-3-indolyl-{\beta}-D-galactopyranoside$) medium for anaerobic expression of lacZ by fusion to a promoter. The chromosomal DNA from these strains were digested by EcoRI, and the EcoRI fragments that contained the fused gene and lacZ sequence were identified by Southern hybridization, using lacZ containing plasmid as a probe. The EcoRI fragment from each strain was cloned and sequenced. The sequence data were compared with the GenBank database. The mutated gene of three strains, CYT4, CYT5, and OS11, was found to be identical, and it was nrdAB that encoded ribonucleoside diphosphate reductase. The gene nrdAB was at min 50.5 on the Escherichia coli linkage map and 2,348,084 on the physical map, and is involved in hemAe-related reduction-oxidation reaction. OS6 and OS14 mutant strains had insertion at min 8.3 and the mutated gene was hemB. The hemB encodes 5-aminolevulinate dehydratase or porphobilinogen synthase. The OS3 mutant had insertion in cydB at min 16.6. The cydAB encodes cytochrome d oxidase. In the case of OS1, the fusion was made with sucA, the E1 component of ${\alpha}-ketoglutarate$ dehydrogenase.

The Effects of Simultaneous Hand Washing by Nurse and Child Before IV Injection (아동과 간호사의 손씻기 프로그램이 정맥주사와 관련한 아동의 불안, 동통과 피부손상에 미치는 효과)

  • Lee, Ae-Ran;Park, Min-Im;Lee, Hyo-Soon;Kim, So-Hyun;Park, Jin-Kyong;Kim, Ji-Soo
    • Child Health Nursing Research
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    • v.14 no.2
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    • pp.129-137
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    • 2008
  • Purpose: To examine the effects on skin injury, pain, and anxiety when nurses and children simultaneous wash their hands before IV injections. Method: A nonequivalent control group, non-synchronized design study was used with 61 children. For a month and a half, children in the experimental group(30) following hand-washing guidelines, washed their hands with nurses before IV insertion. Anxiety and pain were observed and recorded during IV insertion using the Anxiety Reaction Scale and FACES pain scale. After 48-72 hours on IV therapy with an arm-board, skin condition was checked by a research assistant according to guidelines for assessing skin injury developed by the researcher. t-test, ${\chi}^2$-test, Pearson correlation, and Kendall's tau b were used to analyze data with the SPSS program. Results: Children who washed their hands with the nurse before IV insertion showed less pain (p =.021) and skin injury (p <.001) compared to the control group. Conclusion: This finding suggests that simultaneous hand washing by nurse and child before IV injection has a strong effect on skin injury caused by arm-boards used to maintain IV therapy as well as on pain during IV insertion. This program demonstrates an effective intervention to prevent skin injuries in children on IV therapy.

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Theoretical Study on the Reaction Mechanism of Azacyclopropenylidene with Epoxypropane: An Insertion Process

  • Tan, Xiaojun;Wang, Weihua;Li, Ping
    • Bulletin of the Korean Chemical Society
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    • v.35 no.9
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    • pp.2717-2722
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    • 2014
  • The reaction mechanism between azacyclopropenylidene and epoxypropane has been systematically investigated employing the second-order M${\o}$ller-Plesset perturbation theory (MP2) method to better understand the reactivity of azacyclopropenylidene with four-membered ring compound epoxypropane. Geometry optimization, vibrational analysis, and energy property for the involved stationary points on the potential energy surface have been calculated. It was found that for the first step of this reaction, azacyclopropenylidene can insert into epoxypropane at its C-O or C-C bond to form spiro intermediate IM. It is easier for the azacyclopropenylidene to insert into the C-O bond than the C-C bond. Through the ring-opened step at the C-C bond of azacyclopropenylidene fragment, IM can transfer to product P1, which is named as pathway (1). On the other hand, through the H-transferred step and subsequent ring-opened step at the C-N bond of azacyclopropenylidene fragment, IM can convert to product P2, which is named as pathway (2). From the thermodynamics viewpoint, the P2 characterized by an allene is the dominating product. From the kinetic viewpoint, the pathway (1) of formation to P1 is primary.

Numerical Analysis of Heat Transfer in Packed Bed of $Ca(OH)_2/CaO$ for Chemical Heat Pump ($Ca(OH)_2/CaO$계 화학 열펌프에 있어서 고체 반응층의 전열해석)

  • Kim, Jong-Shik
    • Solar Energy
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    • v.17 no.1
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    • pp.67-77
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    • 1997
  • To develop chemical heat pump of higher energy density and efficiency heat-release characteristics accompanied by exothermic hydration reaction in packed bed, $Ca(OH)_2/CaO$ reactor, are examined in a lab-scale unit. We have studied the enhancement effect of inserted fins in cylindical packed bed reactor. The results obtained by numerical analysis about profiles of temperature, completion time of reaction and exothermic heat amount released from the reactor read the insertion of fins in reactor can reduce the reaction completion time by half and the rate of thermochemical reaction depends on the temperature and concentration, and it is also governed by the boundary conditions and the rate of heat transfer in the particle packed bed.

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Improving Stability and Characteristic of Circuit and Structure with the Ceramic Process Variable of Dualband Antenna Switch Module (Dual band Antenna Switch Module의 LTCC 공정변수에 따른 안정성 및 특성 개선에 관한 연구)

  • Lee Joong-Keun;Yoo Joshua;Yoo Myung-Jae;Lee Woo-Sung
    • Journal of the Microelectronics and Packaging Society
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    • v.12 no.2 s.35
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    • pp.105-109
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    • 2005
  • A compact antenna switch module for GSM/DCS dual band applications based on multilayer low temperature co-fired ceramic (LTCC) substrate is presented. Its size is $4.5{\times}3.2{\times}0.8 mm^3$ and insertion loss is lower than 1.0 dB at Rx mode and 1.2 dB at Tx mode. To verify the stability of the developed module to the process window, each block that is diplexer, LPF's and bias circuit is measured by probing method in the variation with the thickness of ceramic layer and the correlation between each block is quantified by calculating the VSWR In the mean while, two types of bias circuits -lumped and distributed - are compared. The measurement of each block and the calculation of VSWR give good information on the behavior of full module. The reaction of diplexer to the thickness is similar to those of LPF's and bias circuit, which means good relative matching and low value of VSWR, so total insertion loss is maintained in quite wide range of the thickness of ceramic layer at both band. And lumped type bias circuit has smaller insertion itself and better correspondence with other circuit than distributed stripline structure. Evaluated ceramic module adopting lumped type bias circuit has low insertion loss and wider stability region of thickness over than 6um and this can be suitable for the mass production. Stability characterization by probing method can be applied widely to the development of ceramic modules with embedded passives in them.

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