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Combined Endoscopic/Microscopic Cochlear Implantation Through the Oval Window
Cantore Italo 대한청각학회 2022 Journal of Audiology & Otology Vol.26 No.2
Standard round window (RW) cochlear implantation is a well-described technique. Implantation might be difficult in patients with inner and middle ear anomalies, in some cases because of not achieving adequate exposure to the RW, with a related higher risk of complications such as facial nerve injury. It is proposed a combined microscopic/endoscopic oval window approach in a 63 year old man affected by bilateral Menière disease, with bilateral severe sensorineural hearing loss, speech discrimination score for bysillabic words under 40% and a hidden RW by anomalous facial nerve course. All electrodes entered the cochlear with good freefield thresholds and auditory ability results. A partial marginalis nerve palsy occurred at the second postoperative day and completely reversed at 2 months from surgery. Endoscopicassisted oval window cochlear implantation may be a safe alternative surgical technique in cases where surgeons are not able to access RW.
용탕단조법으로 제조한 2024/20% SiC 휘스커 복합재의 미세 구조 및 열처리 거동에 대한 연구
이호인,오규환,Cantor, B 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.8
Microstruture of squeeze cast 2024/20% SiC whisker composite was studied using transmission electron microscopy with energy dispersive spectrometry. Microstructure was oberserved at as-cast, solution treated. In as-cast condition, S', θ', S phase was observed in the matrix and at the interface Al_(15)(Fe, Mn)₃Si₂, θ, S phase was observed. After solution treatment, previous phase in the matrix were dissolved and Al_(20)Cu₂Mn₃ shape precipitate was observed in the matrix. Al_(15)(Fe, Mn)₃Si₂ phase which was formed in the casting stage was unchanged and Al_(20)Cu₂Mn₃ precipitate was observed at the interface.
급냉응고시킨 Al-Li 합금에서 준결정상의 형성에 관한 연구
이호인,김도향,Cantor,B. 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.9
The formation of quasicrsatals in rapidly solidified Al-Li alloys have been investigated by detailed transmission electron microscopy, including a combination of bright and dark field imaging, selected area diffraction pattern analysis and energy dispersive X-ray microanalysis. Al-Cu-Li, Al-Cu-Li-Mg and 2024-2Li alloys rapidly solidified by melt spinning consist of various types of solidification microstructure, ranging form a fine columnar grain structure near the chilled ,surface to a coarse cellular structure near the unchilled surface, depending upon the wheel rotation speed during melt spinning and the local cooling rate through the thickness of the ribbon. Fine scale δ' precipitates during melt spinning in Al-Cu-Li, Al-Cu-Li-Mg and 2024-2Li alloys. The intercellular particles in as-melt spun Al-Cu-Li alloys are the T_8, Θ or T_2 icosahedral phases, depending upon the alloy composition, but in as-melt spun Al-Cu-Li-Mg and 2024-2Li alloys are always the icosahedral phase. Addition of Mg is effective in stabilizing the icosahedral phase in Al- Cu-Li alloys. The icosahedral phase forms as a second solidification product and is located at primary α-Al cell or dendrite boundaries, with strong dependence of icosahedral particle size upon the melt spinning wheel speed and local cooling rate. The composition of the icosahedral phase in rapidly solidified Al-Li alloys is not stoichiometric. Thus, the composition of the icosahedral phase in as-rapidly solidified Al-Cu-Li-Mg and 2024-2Li alloys can be expressed as (Al, Si)_6 (Cu, Fe, Mn)(Li, Mg)₃, assuming Si, Mg and (Mn, Fe) replacing Al, Li and Cu respectively in the Al_6CuLi₃ icosahedral structure.
Quantitative Analysis of Nucleic Acids - the Last Few Years of Progress
Ding, Chunming,Cantor, Charles R. Korean Society for Biochemistry and Molecular Biol 2004 Journal of biochemistry and molecular biology Vol.37 No.1
DNA and RNA quantifications are widely used in biological and biomedical research. In the last ten years, many technologies have been developed to enable automated and high-throughput analyses. In this review, we first give a brief overview of how DNA and RNA quantifications are carried out. Then, five technologies (microarrays, SAGE, differential display, real time PCR and real competitive PCR) are introduced, with an emphasis on how these technologies can be applied and what their limitations are. The technologies are also evaluated in terms of a few key aspects of nucleic acids quantification such as accuracy, sensitivity, specificity, cost and throughput.
Vitrification of Gladiolus Shoot Tips from Cormels
Hyang Young Joung,Maria Cantor,David Ellis,Kathryn Kamo 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.4
Gladiolus shoot tips, 1-2 ㎜, were excised from in vitro and greenhouse-grown cormels of cultivar ‘Peter Pears,’ in vitro-grown cormels of ‘Jenny Lee,’ field-grown cormels of the breeding lines 02-943A, 02-900, 02-926, and field-grown cormels of the cultivar ‘Double Deligh’. The major factors that affected growth of shoot tips following vitrification were size and dormancy of the excised shoot tip, cultivar, and time in Plant Vitrification Solution 2 (PVS2). The highest survivals of shoot tips was achieved using either greenhouse-grown ‘Peter Pears’ (77%) and field-grown 02-943A (55%). Recovery of viable shoot tips was best with incubation times of 30 and 60 minutes in PVS2 for ‘Jenny Lee’ and 02-943A, respectively. All shoots that have grown following vitrification were phenotypically normal in the greenhouse.