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남현빈,정세진,구민석,오예진,김용민,이훈희,윤수정,임정균 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2
In addition to the development of functional cosmetics, technology to increase percutaneous absorption rate when applied to the skin is an important task. In this experiment, oleic acid was used as a skin absorption promoter, and its effect on transdermal permeability of adenosine was studied and analyzed using a skin-like membrane. As a result of the experiment, it was investigated that the permeability coefficient and concentration of adenosine are proportional to the content of oleic acid. This indicates that a high proportion of oleic acid is effective as a skin absorption promoter.
Establishment of particulate matter-induced lung injury model in mouse
Se Yong Park,Kyu Sup An,Buhyun Lee,Ju-Hee Kang,Hyun Jin Jung,Min Woo Kim,Hyeon Yeol Ryu,Kyu-Suk Shim,Ki Taek Nam,Yeo Sung Yoon,Seung Hyun Oh 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
Particulate matter (PM) is one of the principal causes of human respiratory disabilities resulting from air pollution. Animal models have been applied to discover preventive and therapeutic drugs for lung diseases caused by PM. However, the induced severity of lung injury in animal models using PM varies from study to study due to disparities in the preparation of PM, and the route and number of PM administrations. In this study, we established an in vivo model to evaluate PM-induced lung injury in mice. PM dispersion was prepared using SRM2975. Reactive oxygen species were increased in MLE 12 cells exposed to this PM dispersion. In vivo studies were conducted in the PM single challenge model, PM multiple challenge model, and PM challenge with ovalbumin-induced asthma using the PM dispersion. No histopathological changes were observed in lung tissues after a single injection of PM, whereas mild to moderate lung inflammation was obtained in the lungs of mice exposed to PM three times. However, fibrotic changes were barely seen, even though transmission electron microscopy (TEM) studies revealed the presence of PM particles in the alveolar macrophages and alveolar capillaries. In the OVA-PM model, peribronchial inflammation and mucous hypersecretion were more severe in the OVA+PM group than the OVA group. Serum IgE levels tended to increase in OVA+PM group than in OVA group. In this study, we established a PM-induced lung injury model to examine the lung damage induced by PM. Based on our results, repeated exposures of PM are necessary to induce lung inflammation by PM alone. PM challenge, in the presence of underlying diseases such as asthma, can also be an appropriate model for studying the health effect of PM.
인공호흡기 적용환자에서 폐쇄형 기도흡인 전·후 과환기와 과산소 적용의 효과
신현주,김정아,권은옥,노화경,김미영,노진숙,권영옥,권정아,손희경,김세현,서미희,김선영,이영진,남지현,우정희,김명애 병원간호사회 2006 임상간호연구 Vol.12 No.2
Purpose: The purpose of this study was to identify the effects of hyperventilation and hyperoxygenation before and after endotracheal suctioning using closed-suction system on mechanically ventilated patients. Method: We selected 20 patients who were mechanically ventilated and randomly assigned into 4 groups according to the type of treatments using repeated measure. We applied 3 types of treatment, hyperventilation, hyperoxygenation, hyperventilation+hyperoxygenation, and no treatment and measured physiologic effects-SpO_(2), HR and, mena BP. Result: There were no significant differences between the group with no treatment and the group with hyperventilation, before and after endotracheal suctioning using closed-suction system(SpO_(2)(p=.693), HR(p=.970) and mean BP(p=.638)). There were no significant differences between the group with no treatment and the group with hyperoxygenation before and after endotracheal suctioning using closed-suction system(SpO_(2)(p=.693), HR(p=.970) and mean BP(p=.638)). There were no significant differences between the group with no treatment and the group with hyperventilation hyperoxygenation before and after endotracheal suctioning using closed-suction system(SpO_(2)(p=.693), HR(P=.970) and mean BP(P=.638)). Conclusion: As the results, all of the methods, hyperventilation, hyperoxygenation, and hyperventilation hyperoxygenation can be used when nurses apply endotracheal suctioning using closed-suction systems. In case of hypoxemic patients, hyperoxygenation is recommended for prevention of deoxygenation due to endotracheal suctioning using closed-suction systems.
Jang, Se Hyeon,Jeong, Hae Jin,Lim, An Suk,Kwon, Ji Eun,Kang, Nam Seon The Korean Society of Phycology 2016 ALGAE Vol.31 No.1
To explore the feeding ecology of the newly described heterotrophic dinoflagellate Aduncodinium glandula in the family Pfiesteriaceae, its feeding behavior and prey species were investigated. Additionally, the growth and ingestion rates of A. glandula on the mixotrophic dinoflagellates Heterocapsa triquetra and Akashiwo sanguinea, its optimal and suboptimal prey, respectively were measured. A. glandula fed on prey through a peduncle after anchoring to the prey using a tow filament. A. glandula ate all algal prey and perch blood cells tested and had the most diverse prey species in the family Pfiesteriaceae. Unlike for other pfiesteriacean species, H. triquetra and A. sanguinea support the positive growth of A. glandula. However, the cryptophytes Rhodomonas salina and Teleaulax sp. and the phototrophic dinoflagellate Amphidinium carterae did not support the positive growth of A. glandula. Thus, A. glandula may have a unique kind of prey and its optimal prey differs from that of the other pfiesteriacean dinoflagellates. With increasing mean prey concentration, the growth rates of A. glandula on H. triquetra and A. sanguinea increased rapidly and then slowed or became saturated. The maximum growth rates when feeding on H. triquetra and A. sanguinea were 1.004 and 0.567 d<sup>−1</sup>, respectively. Further, the maximum ingestion rates of A. glandula on H. triquetra and A. sanguinea were 0.75 and 1.38 ng C predator<sup>−1</sup> d<sup>−1</sup>, respectively. There is no other pfiesteriacean species having H. triquetra and A. sanguinea as optimal and suboptimal prey. Thus, A. glandula may be abundant during blooms dominated by these species not preferred by the other pfiesteriacean dinoflagellates.