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시설재배지에서 바이오차 활용을 통한 아산화질소(N₂O) 배출 효과
김소희(So-Hui Kim),강세원(Se-Won Kang),윤진주(Jin-Ju Yun),조한나(Han-Na Cho),박재혁(Jae-Hyuk Park),이승규(Seung-Gyu Lee),조주식(Ju-Sik Cho) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
지속적인 지구온난화로 인해 우리나라 연평균 기온이 2001년부터 2020년까지 0.6℃ 상승하였고, 우리나라에서도 바나나와 같은 아열대 농작물 재배 가능 지역으로 자리잡고 있다. 지구온난화의 주요 원인은 온실가스로 알려져 있으며, 아산화질소(N₂O)는 강력한 지구온난화 지수를 가진 기체 중 하나이다. 바이오차는 토양에 적용 시 탄소 격리 가능성이 있는 것으로 보고되었지만, 바이오차의 종류에 따라 토양에 어떻게 영향을 미치는지는 아직 불분명하다. 이 연구는 시설재배지에서 바이오차의 종류별 활용 시 아산화질소(N₂O) 배출에 어떤 영향을 미치는지 평가하기 위해 진행되었다. 토양은 시설재배지(TS) 토양을 이용하였으며, 수분 보수력을 70%로 유지하였다. 바이오차는 왕겨 바이오차(RB)와 농업 부산물과 함께 펠릿화 시킨 바이오차(PB)를 사용하였다. 두가지 바이오차는 각각 0, 5, 10, 20 t ha<SUP>-1</SUP> (대조군, RB5, RB10, RB20, PB5, PB10, PB20)으로 적용하였다. 그 결과, TS-RB20 처리조건에서 배출된 N₂O는 TS-RB5와 TS-RB10 처리 조건에 비해 약 4% 및 14% 감소 되었으며, RB의 함량이 증가할수록 N₂O 배출량이 감소하는 것을 확인하였다. 반면에 RB 처리구의 경우에는 RB20>RB10>RB5 순으로 N₂O 배출량이 많았다. 따라서 시설재배지에서 RB 처리를 하는 것은 N₂O 저감에 효과적이며, 향후, 바이오차 종류에 따른 온실가스 배출량에 대한 평가가 추가로 필요한 것으로 판단된다.
Airway foreign body occurs unintentionally during anesthetic management of patient with asthma
Cho, Woo Jin,Yun, So Hui,Choi, Yun Suk,Lee, Bang Won,Kim, Mi Ok,Park, Jong Cook Institute for Medical Science 2019 The Journal of Medicine and Life Science Vol.16 No.2
Intraoperative delivery of salbutamol (${\beta}_2$ agonist) through a breathing circuit may be performed in asthma patient. A 28-year-old woman with a history of asthma was diagnosed with chronic sinusitis and bilateral nasal polyps, and an endoscopic sinus surgery was performed. The patient was recommended salbutamol nebulization every 4 hours during the perioperative period because of the risk of asthma attack. At the end of the operation, when salbutamol was sprayed through the tube before extubation and the connector tip went inside the tube during injection. The patient was immediately referred to the pulmonary medicine department for bronchoscopy, where the foreign body was removed safely without any complications. When general anesthesia is performed on a patient who usually uses an inhaler for asthma, caution is required because the tip that connects the inhaler and the breathing circuit can aspirate into the endotracheal tube and enter the lungs when applying the inhaler before waking up the patient.
Wound Healing Potential of Low Temperature Plasma in Human Primary Epidermal Keratinocytes
Hui Song Cui,Yoon Soo Cho,So Young Joo,Chin Hee Mun,Cheong Hoon Seo,June-Bum Kim 한국조직공학과 재생의학회 2019 조직공학과 재생의학 Vol.16 No.6
BACKGROUND: Low temperature plasma (LTP) was recently shown to be potentially useful for biomedical applications such as bleeding cessation, cancer treatment, and wound healing, among others. Keratinocytes are a major cell type that migrates directionally into the wound bed, and their proliferation leads to complete wound closure during the cutaneous repair/regeneration process. However, the beneficial effects of LTP on human keratinocytes have not been well studied. Therefore, we investigated migration, growth factor production, and cytokine secretion in primary human keratinocytes after LTP treatment. METHODS: Primary cultured keratinocytes were obtained from human skin biopsies. Cell viability was measured with the EZ-Cytox cell viability assay, cell migration was evaluated by an in vitro wound healing assay, gene expression was analyzed by quantitative real-time polymerase chain reaction, and protein expression was measured by enzyme-linked immunosorbent assays and western blotting after LTP treatment. RESULTS: Cell migration, the secretion of several cytokines, and gene and protein levels of angiogenic growth factors increased in LTP-treated human keratinocytes without associated cell toxicity. LTP treatment also significantly induced the expression of hypoxia inducible factor-1a (HIF-1a), an upstream regulator of angiogenesis. Further, the inhibition of HIF- 1a expression blocked the production of angiogenic growth factors induced by LTP in human keratinocytes. CONCLUSION: Our results suggest that LTP treatment is an effective approach to modulate wound healing-related molecules in epidermal keratinocytes and might promote angiogenesis, leading to improved wound healing.
So Young Park,Hyo Jeong Choi,Dong Hyun Kim,A Ram Cho,Sang Hui Hwang,Hye Bin Kim,Man goo Kim 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Paint peeling was found on the pedestrian road in Gongjicheon Stream. The peeled paint was introduced into the water system in the form of microplastics, which was discussed as an environmental problem in the local community. The introduced microplastics are a mixture of chemicals that can cause water and ecological health degradation and spread along the Bukhangang River water system to the Hangang River basin. In general, microplastics refer to plastics of 5 mm or less, but in this study, microplastics in the soil were analyzed, and a total of 5 research points were designated based on the size of 2 mm or less to be quantified and qualitatively analyzed. As a result of quantitative analysis, the particle size of microplastics observed in the soil was 0.000173 mm to 2 mm and 70 near Uiamho Lake in Chuncheon MBC, 13,128 in Gongjicheon Seoksa Bridge, 17,700 between Gongjicheon Toegye Bridge and Namchuncheon Bridge, 8 in Gongjicheon Recreation Area, and 205 at Gongjicheon Gongji Bridge were detected. As a result of the analysis, at least 1.1×10<SUP>9</SUP> microplastics were calculated based on a maximum particle diameter of 2 mm and a maximum of 1.1×10<SUP>17</SUP> microplastics were calculated based on a minimum particle diameter of 0.000173 mm. As a result of qualitative analysis, the same IR value was confirmed at all wave numbers except for 1550 /cm to 1200 /cm and 700 /cm. Through IR spectral analysis, matching of OH, NH, NH amide or Aldehydes and Ketones or Ester, NH amines, C=C trans, H-C=C, C=C cis or C-Cl functional group components were confirmed. Qualitative and quantitative analyzes were able to demonstrate the release of microplastics into the surrounding soil.
RAW264.7세포에서 식물 추출물 6종의 Nitric Oxide 생성 억제 효과
So Hui Jeong,Nam Woo Kwon,Jae Yeon Kim,Yong Beom Cho,Seong Sub Ku,Moon Soon Lee 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : As a part of ongoing research to elucidate and characterize anti-inflammatory nutraceuticals, six kinds of plant extracts (aerial part of Nepeta cataria, leaves of Lonicera maackii, leaves of Platycarya strobilacea, flower of Fagopyrum dibotrys, flowers and fruits of Solanum nigrum, stem of Physostegia virginiana) were tested for their ability to suppress inflammation. The anti-inflammatory has been studied in lipopolysaccharide (LPS)-stimulated RAW264.7 cells which cells synthesized nitric oxide (NO) from L-arginine by nitric oxide synthase (NOS). In this study, NO synthesis inhibitory activity of six kinds of plant extracts on LPS-stimulated RAW 264.7 mouse macrophages was evaluated. Methods and Results : Six kinds of plant extracts were parceled out from RDA (Rural Development Administration). RAW 264.7 cells (1.5×105 cells/well) were seeded onto 96-well plates with DMEM media containing 10% FBS and 1% antibiotics. The cells were pretreated with the extracts and LPS-stimulated cells for 24 h. Cellular NO production was stimulated by adding 1 μg/mL of LPS. After incubation, Griess reagent was used to determine NO production. Absorbance was measured at 520 nm by microplate reader. NO synthesis inhibitory activity potential of these extracts was evaluated by assessing NO production by LPS-stimulated RAW 264.7 cells in the presence. As a result, inhibition rate of NO production was about 40% of L. maackii, 33% of F. dibotrys, 23% of P. strobilacea and 17% of P. virginiana. Meanwhile, there was no significant results in aerial part of N. cataria and flowers and fruits of S. nigrum. Conclusion : From the above results, we be able to confirm that leaves of L. maackii and flower of F. dibotrys appeared dose-dependent NO synthesis inhibitory activity and leaves of P. strobilacea appeared NO synthesis inhibitory activity in low-concentration. As screening NO synthesis inhibition of six extracts, they may be a good candidate for delaying the progression of human inflammatory diseases and warrants further studies.
So Young Park(박소영),Hyo Jeong Choi,Dong Hyun Kim,A Ram Cho,Sang Hui Hwang,Hye Bin Kim,Man goo Kim 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Paint peeling was found on the pedestrian road in Gongjicheon Stream. The peeled paint was introduced into the water system in the form of microplastics, which was discussed as an environmental problem in the local community. The introduced microplastics are a mixture of chemicals that can cause water and ecological health degradation and spread along the Bukhangang River water system to the Hangang River basin. In general, microplastics refer to plastics of 5 mm or less, but in this study, microplastics in the soil were analyzed, and a total of 5 research points were designated based on the size of 2 mm or less to be quantified and qualitatively analyzed. As a result of quantitative analysis, the particle size of microplastics observed in the soil was 0.000173 mm to 2 mm and 70 near Uiamho Lake in Chuncheon MBC, 13,128 in Gongjicheon Seoksa Bridge, 17,700 between Gongjicheon Toegye Bridge and Namchuncheon Bridge, 8 in Gongjicheon Recreation Area, and 205 at Gongjicheon Gongji Bridge were detected. As a result of the analysis, at least 1.1×10<SUP>9</SUP> microplastics were calculated based on a maximum particle diameter of 2 mm and a maximum of 1.5×10<SUP>17</SUP> microplastics were calculated based on a minimum particle diameter of 0.000173 mm. As a result of qualitative analysis, the same IR value was confirmed at all wave numbers except for 1550 /cm to 1200 /cm and 700 /cm. Through IR spectral analysis, matching of OH, NH, NH amide or Aldehydes and Ketones or Ester, NH amines, C=C trans, H-C=C, C=C cis or C-Cl functional group components were confirmed. Qualitative and quantitative analyzes were able to demonstrate the release of microplastics into the surrounding soil.