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임경란 ( Kyoung Ran Yim ),김현철 ( Hyeon Chul Kim ),문명진 ( Myoung Jin Moon ),강석호 ( Suk Ho Kang ),안은희 ( Eun Hee Ahn ),장성운 ( Sung Woon Jang ),신승주 ( Seung Joo Shin ),김광일 ( Kwang Il Kim ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.11
Fetal bilateral renal agenesis is a lethal congenital anomaly characterized by bilateral pulmonary hypoplasia, deformities and death due to severe oligohydramnios. This syndrome is associated with malformations of genitourinary tract, cardiovascular system, vertebral bodies or imperforated anus in more than half of the affected individuals. An early and reliable prenatal diagnosis is extremely important because it may offer options for pregnancy termination as early as possible. The criteria for the ultrasonographic diagnosis of bilateral renal agenesis are severe oligohydramnios, nonvisualization of the bladder, empty renal fossae. But poor sonographic resolution of severe oligohydramnios makes it difficult to diagnose the disease. We present a case of bilateral renal agenesis diagnosed at the 18th weeks gestation by using Transvaginal Ultrasonography and Color Doppler.
Luminescent properties of SrZnO2:Tb3+ hybrid thin film phosphors grown by pulsed laser deposition.
Jung, Ye Ran,Yang, Hyun Kyoung,Moon, Byung Kee,Choi, Byung Chun,Jeong, Jung Hyun,Choi, Haeyoung,Kim, Jung Hwan,Kim, Kwang Ho American Scientific Publishers 2011 Journal of Nanoscience and Nanotechnology Vol.11 No.1
<P>Novel green-light-emitting Tb(3+)-doped SrZnO2 phosphor thin films were grown via the pulsed-laser-deposition technique. The films were grown at various substrate temperatures and oxygen pressures. The crystallinity and surface morphology of the films were investigated via X-ray diffraction (XRD) and atomic-force microscopy (AFM), respectively. The luminescence properties were analyzed by measuring the excitation and photoluminescence spectra. The thin films showed a green emission radiated by the transitions from the 5D4 excited states to the 7FJ (J = 3-6) ground states of the Tb3+ ions found under ultraviolet excitation with a 272 nm wavelength. The crystallinity, surface morphology, and photoluminescence spectra of thin-film phosphors were found to be highly dependent on the deposition conditions, particularly the substrate temperature and oxygen pressure. The surface roughness and photoluminescence intensity of the films showed similar behaviors as a function of the substrate temperature and oxygen pressure.</P>
Suppression of pine wilt disease by an antibacterial agent, oxolinic acid
Kwon, Hyeok Ran,Choi, Gyung Ja,Choi, Yong Ho,Jang, Kyoung Soo,Sung, Nack-Do,Kang, Mun Seong,Moon, Yilseong,Lee, Seung Kyu,Kim, Jin-Cheol John Wiley Sons, Ltd. 2010 PEST MANAGEMENT SCIENCE Vol.66 No.6
<P>BACKGROUND: Pine wilt disease (PWD) is very complex and has been reported to be caused by pine wood nematode, Bursaphelenchus xylophilus (Steiner & Buhrer) Nickle, and its accompanying bacteria. However, there is no report on the control of PWD by antibacterial agent. The present study was performed to investigate disease control efficacy of antibacterial agents against PWD.</P><P>RESULTS: Among six antibacterial antibiotics tested, oxolinic acid (OA) showed the strongest antibacterial activity against five bacteria isolated from three strains of pine wood nematode. In in vivo assay, it effectively suppressed the development of PWD in three-year-old seedlings of Pinus densiflora Sieb. & Zucc.; it showed 71% control when injected at 3 mg per seedling. A mixture of OA and the nematicidal agent abamectin (Ab) showed higher disease control efficacy against PWD than either OA or Ab alone. In addition, OA alone and a mixture of OA and Ab also controlled PWD in approximately 20-year-old pine trees under field conditions.</P><P>CONCLUSION: This is the first report on the suppression of PWD by OA. The result strongly indicates that PWD could be controlled by antibacterial antibiotic alone and a combination of antibacterial and nematicidal agents. Copyright © 2010 Society of Chemical Industry</P>
Suraj Adhikari,Kyoung-Ran Moon,Wonjae Lee 한국생물공학회 2021 KSBB Journal Vol.36 No.1
The present study aimed to evaluate the antidiarrheal and superoxide scavenging activities of ethanolic extract of Stenochlaena palustris, an edible fern from Blechnaceae family. The antidiarrheal activity was determined against castor oil induced diarrhea model, gastrointestinal transit and enteropooling tests in Swiss albino mice. The test groups received various doses (100, 200, and 400 mg/kg, body weight) of the extract, whereas positive control received loperamide (3 mg/kg, b.w.) and negative control was supplied with 1% tween-80 in distilled water (10 mL/kg, b.w.). At three test doses (100, 200 and 400 mg/kg), the extract showed significant (p < 0.001) and dose dependent antidiarrheal activity in all models. The delay and reduction in the onset, frequency, and weight of diarrheic feces as well as inhibition of the gastrointestinal transit and intraluminal fluid accumulation were observed in all models and highly comparable to the standard loperamide. The extract also exhibited high inhibitory ability to scavenge superoxide anion (O₂<SUP>• –</SUP>). The highest percentage inhibition of superoxide anion was found to be 84.32 ± 0.15% at the concentration 800 μg/mL.
Stimulation of Cell Growth by Erythropoietin in RAW264.7 Cells: Association with AP-1 Activation
Seong Seu-Run,Lee Jae-Woong,Lee Yong-Kyoung,Kim Tae-Il,Son Dong-Ju,Moon Dong-Cheol,Yun Young-Won,Yoon Do-Young,Hong Jin-Tae The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.3
Erythropoietin (EPO), a hematopoietic factor, is required for normal erythrocyte developments, but it has been demonstrated to have many other functions, and its receptor is localized in other tissues. In the present study, we investigated whether EPO can promote other cell proliferation and possible molecular mechanisms. EPO restored the inhibition of the RAW264.7 and PC12 cell growth by fetal bovine serum (FBS) withdrawal in a dose dependent manner, but not that of other cell types tested. The restoring effect of EPO was completed when the RAW264.7 cells were cultured in the medium containing as low as 3% of FBS, and 10 U/mL EPO could replace FBS. The restoring effect of EPO in the RAW264.7 cells was associated with the increased of c-Fos and c-Jun expression as well as AP-1 activation. These data demonstrate that EPO can stimulate RAW264. 7 cell as well as PC12 cell growth even when the cells were cultured without FBS or in the presence of small amounts of FBS in the medium, and this stimulating effect is associated with the activation of AP-1 transcription factor.
김영란(Kim, Young Ran),배성문(Bae, Sung Moon),박경숙(Bark, Kyoung Sook) 한국유아교육·보육복지학회 2016 유아교육·보육복지연구 Vol.20 No.3
본 연구의 목적은 만 0세∼만 5세의 영․유아가 스마트폰 사용으로 인한 사회적 발달의 문제 등을 조사하고, 영․유아 자녀를 둔 어머니들의 영․유아의 스마트폰 과다사용에 인식 및 사용 실태를 알아봄으로써 취학 전 영․유아들을 위한 스마트폰 사용에 대한 교육적 방안을 제시해 보고자 하였다. 연구결과 첫째, 영․유아의 스마트폰 사용에 대한 어머니의 인식을 본 결과 영․유아의 스마트폰의 필요 여부에서는 스마트폰이 필요하지 않음으로 나타났다. 필요한 이유에서는 학습적인 면과 시대적 흐름에 맞추기 위해서 스마트폰의 필요하다고 하였다. 무엇보다도 스마트폰의 장시간 사용은 영․유아의 신체발달, 인지발달에 저해되며 시각장애가 우려되기 때문에 필요 없음으로 나타났다. 둘째, 어머니가 인식하는 영․유아의 스마트폰 사용 실태는 영․유아의 스마트폰 사용 첫 시작은 36개월 이상으로 가장 높았으며 영․유아의 스마트폰 일주일 사용 횟수를 살펴본 결과, 영․유아의 일주일 동안 사용횟수에 있어 1회∼2회가 가장 많았다. 또한 영․유아가 스마트폰을 사용할 경우 1회 평균 사용 시간에서는 20분 이하가 높게 나타났다. 최근(3개월 이내) 스마트폰 1회 사용 시간의 변화에서는 변화가 없음이 가장 많았으며, 영․유아의 스마트폰의 사용 시간대에서는 주말동안이 가장 많았다. 영․유아의 스마트폰을 알려주는 대상으로는 혼자 스스로 터득한 경우가 가장 많았다. 스마트폰 사용 시 함께 하는 대상으로는 부모가 옆에 앉아 아이와 함께 하는 편이 가장 높게 나타났다. 이와 같은 결론은 영․유아의 스마트 기기 사용으로 인한 발달에 미치는 영향 및 교육적 접근의 필요성을 시사하고 있다. The purpose of this study is only the spirit of 0 years old-only 5 years old, children are recognized in investigating such issues of social development, and the spirit, the spirit of the mother of an infant child, using smartphone plethora of infants caused by the use of smartphones and by spring out usage evaluate the present educational plan for smartphone use for infants, pre-school spirit. Results First, zero, resulting in the need for the recognition of mothers of infants to use smartphone in children appeared not need a smartphone. The reason why it was necessary to meet the current needs of the times and learning aspect smartphones. Above all, prolonged use of smart phones to inhibit physical development, cognitive development of young children, and had no need to fear the ttyaemun become visually impaired. Second, the mother recognizes the spirit, smartphone use status of a toddler is zero, infants smartphone uses the first start was the highest in 36 months, a result of examining the smartphone week using the number of children, the spirit, the week of infant there once to 2 times, the most common use for a number of times. Also, if you are using a smartphone Young, infants, the average use per hour is higher than 20 minutes. Recent (within 3 months) had no change in the two most common variations of the smartphone use one time, in the spirit of the time, the use of smart phones over the weekend were the most children. To inform the spirit of smartphones, infants were the most frequent target if the target itself alone learned that when used together, young children, the smartphone has appeared to side with the highest child sitting next to a parent. Such conclusions suggest the need for impact, educational approach to the development of smart devices due to the use of the spirit, baby.