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( Wonjun Choi ),( Jinsook Seok ),( Inyoung Choi ),( Jikwon Park ),( Jeongkyu Shin ),( Soonae Lee ),( Wonyoung Paik ),( Jonghak Lee ) 대한산부인과학회 2015 Obstetrics & Gynecology Science Vol.58 No.5
Revascularization is critical for successful ovarian tissue transplantation. Vascular endothelial growth factor (VEGF) and angiopoietin-2 (angpt-2) are the principal mediators of neovascularization. This study was designed to assess VEGF and angpt-2 levels in cryopreserved ovarian tissue after heterotopic autotransplantation.Ovarian tissues harvested from ICR mice at 5 to 6 weeks of age were stratified as follows: no cryopreservation (controls, group I); vitrification in VFS-40 (vitrification, group II); and gradual freezing in dimethyl sulfoxide (slow-freezing, group III). Frozen specimens were thawed at room temperature, assaying VEGF and angpt-2 levels 1 week after cryopreservation and 2 weeks after autotransplantation.VEGF and angpt-2 protein levels were significantly lower in cryopreserved ovaries of groups II and III than in controls (group I, P<0.05), whereas groups II and III did not differ significantly in this regard. After autotransplantation of cryopreserved ovarian tissue, VEGF and angpt-2 protein levels did not differ significantly by technique but tended to be lower than corresponding levels in controls.Expression of angiogenic factors in ovarian tissue is thought to vary by method of cryopreservation. Our findings indicate that levels of angiogenic factors expressed in cryopreserved ovarian tissue after autotransplantation do not differ appreciably from control levels, regardless of cryopreservation technique.
최원준(Wonjun Choi),신태범(Taebeom Shin),나종성(Jongseong Na) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Non-volatile byte addressable memories in Engine Management Systems are becoming more common, and are increasingly used for user specific data that must not be lost. The NVRAM strategy how to keep and update the user-specific data need to be concerned in case of Heavy Duty and Medium Duty since many drivers can be changed on a vehicle. Existing NVRAM management system in Heavy duty/Medium duty do not include features that manage each pages according to each users. It means EMS could not save and update the user specific data. A-NVM has been designed to address these problems by providing software function in order to monitor and manage multiple users by memory page management. A-NVM uses a special user identification procedure by UDS to identify drivers, making it possible to periodically send the user identification message when driver identified by the display interface on vehicles. A-NVM will get the user specified message and do memory page loading by the identification from driver. It also checks integrity on every operation to ensure that the file system is consistent.