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김주엽,이기명,박규식 慶北大學校農業科學技術硏究所 1997 慶北大農學誌 Vol.15 No.-
과채류의 재배에 있어서 접목은 작물의 안정적인 생산과 품질 향상을 위해 없어서는 안되는 기술이다. 그러나 지속적인 숙련 노동력의 감소와 농촌 인구 노령화 등으로 나타나는 노동력 부족 현상은 접목묘의 대량생산 공급에 어려움이 되고 있다. 본 연구에서는 기계접목에 있어서 접목법이 간단하며 접합부자재가 불필요한 삽접법을 이용하는 기계접목 메카니즘 개발의 기초연구를 수행하였다. 트레이상의 육묘상태에서 자동으로 접목하기 위한 기계접목의 기초연구로써 1본씩 수동 공급하는 반자동 기계삽접의 메카니즘 개발에 관한 연구로서 얻어진 결과를 요약하면 다음과 같다. 1. 접합부자재를 사용하지 않고 대부분 과채류에 적용가능한 삽접 기계접목장치의 메카니즘을 구성하였다. 2. 오이를 접수로 하고 신토좌와 흑종을 대목으로 하는 기계접목시험에서 모두 98%의 접목성공율을 나타냈다. 3. 1본 수동 공급에 의한 기계접목 시스템을 10초 정도로 접목 성능은 저조하지만 기계접목 메카니즘의 가능성을 확인하였다. Grafting is an important skill for the stable supply and production of high quality. However, the shortage of skillful labor has become great difficulty for a mass production of grafting-seedling. In this study, a suitable mechanism for a grafting machine was developed. The following summarize the results of this study: 1. An insertion method was selected for mechanism of the grafting machine without bonding agent, clip, pin. This insertion-grafting method can be applicable to general vegetables and a mass production system. In addition to, this method is suitable for developing the grafting mechanism. 2. Growing point was removed while remaining both cotyledons on rootstock. The productivity of this system was five fold greater than the one of an experienced labor. 3. The rootstock processing was placed on left and scion processing unit was placed on right of the system, then processed rootstock and scion graft by rotating 180˚. 4. The efficiency tests on mechanical grafting rate showed 98%.
Investigation of Color Effects in Lepton-Pair Collisions
Kim, Sung Kyu,Lee, Hyun Kyu,Kim, Yup 울산대학교 1980 연구논문집 Vol.11 No.2
color의 효과를 실험과 비교하기 위해서 깨어진 color규격이론의 입장에서 등 광양자 근사법에 전자쌍 충돌에서의 고에너지 p , jet 생성미분 산란단면적을 계산했다. 이 산란 단면적은 Parameter에 관계없었다. 또 이 결과를 정확한 color규격이론의 산란단면적과 비교한 결과 깨어진 쪽의 것이 정확한 쪽보다 상당히 큰 것을 알아냈다. The differential cross section of the high P jet production is claculated using the equivalet-photon approximation in the framework of the broken color gauge sysmmetry theory to investigate color effects. The cross section is found to have no parpmeter at all. And the results are compared with tat of the exact dolor sysmmetry and it is found that the cross section of the broken color sysmmetry is larger than that of the excat color sysmmetry theory.
Protective effect of berberine chloride against cisplatin-induced ototoxicity
Kim Jong-Heun,Baek Jeong-In,Lee In-Kyu,Lee In-Kyu,김예리,Lee Kyu-Yup 한국유전학회 2022 Genes & Genomics Vol.44 No.1
Background: Cisplatin (CP) is an effective anticancer drug broadly used for various types of cancers, but it has shown ototoxicity that results from oxidative stress. Berberine has been reported for its anti-oxidative stress suggesting its therapeutic potential for many diseases such as colitis, diabetes, and vascular dementia. Objective: Organ of Corti of postnatal day 3 mouse cochlear explants were used to compare hair cells after the treatment with cisplatin alone or with berberine chloride (BC) followed by CP. Methods: We investigated the potential of the anti-oxidative effect of BC against the cisplatin-induced ototoxicity. We observed a reduced aberrant bundle of stereocilia in hair cells in CP with BC pre-treated group. Caspase-3 immunofluorescence and TUNEL assay supported the hypothesis that BC attenuates the apoptotic signals induced by CP. Reactive oxygen species level in the mitochondria were investigated by MitoSOX Red staining and the mitochondrial membrane potentials were compared by JC-1 assay. Results: BC decreased ROS generation with preserved mitochondrial membrane potentials in mitochondria as well as reduced DNA fragmentation in hair cells. In summary, our data indicate that BC might act as antioxidant against CP by reducing the stress in mitochondria resulting in cell survival. Conclusion: Our result suggests the therapeutic potential of BC for prevention of the detrimental effect of CP-induced ototoxicity.
Hayeon Kim(Hayeon Kim),Bumhee Park(Bumhee Park),Shin-Young Kim(Shin-Young Kim),Jiyea Kim(Jiyea Kim),Bora Kim(Bora Kim),Kyu-In Jung(Kyu-In Jung),Seung-Yup Lee(Seung-Yup Lee),Yerin Hyun(Yerin Hyun),Bung 대한정신약물학회 2022 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.20 No.4
Objective: This research measures the regional GMV (rGMV) of the cerebellum, attention, Executive Function (EF) and we aimed to identify their correlation and sex differences in children and adolescents. Methods: Subjects comprised 114 children (male = 62, female = 52, 12.44 ± 2.99 years old) from South Korea. Participants were divided into three groups by age (age 6−9, 10−13, and 14−17). The Stroop Color and Word Test (SCWT), Wisconsin Card Sorting Test (WCST), and Advanced Test of Attention (ATA) were used to estimate executive function. Magnetic resonance imaging (MRI) images were analyzed with Regional Voxel-Based Morphometry Analysis. Results: The correlations between cerebellar rGMV and SCWT, WCST, and ATA subcategories showed difference by age and sex. In 6−9 age group, girls showed more overall correlations with cerebellar regions than boys, in WCST Categories Completed and ATA results. In age 10−13 group, more regions of cerebellum corresponded to SCWT subcategories in girls. Nevertheless, more correlation between cerebellar rGMV, WCST subcategories and some ATA subtests were observed in boys in the same age group. In the adolescent group, aged 14−17, boys showed more correlation with cerebellar rGMV, while girls showed little correlation. Conclusion: This study highlights that sex-different cerebellum maturation in adolescence might be correlated with EF and attention. These results provides evidence that cerebellum modulates higher cognitive functioning during child development.