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Economic response models for membrane design
Kwon, Soojin,Hwang, Sungwon,Binns, Michael Elsevier 2017 Journal of membrane science Vol.544 No.-
<P><B>Abstracts</B></P> <P>Membrane processes are typically analyzed to determine the most energy efficient and cost effective configurations and operating conditions. This can be achieved through simulation and optimization to identify the optimal designs for each case. In this study, a new approach is suggested for the visual analysis and comparison of the economic performance of different membrane configurations. The new methodology generates response surfaces for each configuration that can be used to show ranges of possible solutions. These solution surfaces can then be compared to show the conditions, under which each configuration become beneficial. This is demonstrated here through a case study using hollow fiber membrane separation systems to reduce the concentrations of CO<SUB>2</SUB> in natural gas.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hollow fiber membrane system for natural gas treatment is mathematically modeled. </LI> <LI> Response surface method for economic analysis of various membrane configurations. </LI> <LI> Interaction between the ROI, CH4 recovery and membrane area ratio is proposed. </LI> <LI> Economic performance is analyzed based on membrane configurations. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kwon, SooJin,Ki, Soo Mi,Park, Sang Eon,Kim, Min-Jeong,Hyung, Brian,Lee, Na Kyung,Shim, Sangmi,Choi, Byung-Ok,Na, Duk L,Lee, Ji Eun,Chang, Jong Wook Elsevier 2016 Molecular therapy Vol.24 No.9
<P>The role of Wharton's jelly-derived human mesenchymal stem cells (WJ-MSCs) in inhibiting muscle cell death has been elucidated in this study. Apoptosis induced by serum deprivation in mouse skeletal myoblast cell lines (C2C12) was significantly reduced when the cell lines were cocultured with WJ-MSCs. Antibody arrays indicated high levels of chemokine (C motif) ligand (XCL1) secretion by cocultured WJ-MSCs and XCL1 protein treatment resulted in complete inhibition of apoptosis in serum-starved C2C12 cells. Apoptosis of C2C12 cells and loss of differentiated C2C12 myotubes induced by lovastatin, another muscle cell death inducer, was also inhibited by XCL1 treatment. However, XCL1 treatment did not inhibit apoptosis of cell lines other than C2C12. When XCL1-siRNA pretreated WJ-MSCs were cocultured with serum-starved C2C12 cells, apoptosis was not inhibited, thus confirming that XCL1 is a key factor in preventing C2C12 cell apoptosis. We demonstrated the therapeutic effect of XCL1 on the zebrafish myopathy model, generated by knock down of a causative gene ADSSL7. Furthermore, the treatment of XCL1 resulted in significant recovery of the zebrafish skeletal muscle defects. These results suggest that human WJ-MSCs and XCL1 protein may act as promising and novel therapeutic agents for treatment of myopathies and other skeletal muscle diseases.</P>
츠카모토 신야의 <鐵男>(1989)을 통해 살펴 본 기계적-몸 이미지
권수진(Soojin Kwon),권하진(Hajin Kwon) 한국콘텐츠학회 2015 한국콘텐츠학회논문지 Vol.15 No.6
본 연구는 츠카모토 신야의 영화 <철남>(1989)의 기계적-몸 이미지에 대한 연구로 탈인간화 하는 몸 그리고 욕망에 대한 해석을 시도 하였다. <철남>에서 살펴본 기계적-몸 이미지는 초현실주의적 이미지, 그로테스크적 이미지, 그리고 에로스적 이미지로 관찰되었다. 기계적-몸의 초현실주의적 이미지는 <철남>의 변화과정에서 보이는 변용, 파괴, 착란, 그리고 환상에 대한 과장으로 파악되었고, 그로테스크적 이미지는 인물의 일상적인 공간에서 기괴한 형태로의 변형으로 인간의 내재된 실체를 보여줌으로써 엽기성과 나약함이 혼합된 이미지로 관찰 되었다. 그리고 에로스적 이미지는 불완전한 존재가 완전함을 추구하고자 하는 욕망에 의해 스스로의 파괴와 재탄생을 이루는 과정에서 나타났다. 위의 세 가지 이미지 유형에 대한 분석은 세계정복을 꿈꾸는 과부화된 인간의 욕망이 탈인간화된 기계적-몸으로서 비유기체로의 시각화로 귀결된다. This article analysis the aesthetics of metal-body of <Tetsuo: The Iron Man>(1989) and its metamorphosis of dehumanization through visual desires expressed by body images. This paper suggests theoretical analysis based on aesthetic views to understand the underlying meanings. The research categorizes three types of images; surreal image, grotesque image and eros image from the metamorphosis of dehumanization and transformation throughout the film. As the surreal image, the metamorphic process of transformation, demolition, derangement, illusion, and human desire continues to reflect the evil side of a human in everyday life. It also visualizes the images of exaggeration through weakness and bizarre side of metal-body. The grotesque image of body metamorphosis displays and symbolizes double-sides of bizarre and weak side of human in the everyday environment when malformation reaches its peak when Tetsuo finally shows his transforming figure. Finally, the eros image is analogized as a man’s inner self and self-destruction in surreal world and a grotesque figure when overwhelming desire of transforming into rebirth of a perfect metal-body, Tetsuo. The surreal image, grotesque image, and eros image portraits human desires inner and outer-self into visualized image and that represents the means of excessive desire for dreaming of world domination with merging non-organic medium of metal and organic body to create a perfect body-image.
김수진(Soojin Kim),이상윤(SangYoon Lee),한종권(Jong-Kwon Han),이재권(Jae-Kwon Lee),최미정(Mi-Jung Choi) 한국식품과학회 2015 한국식품과학회지 Vol.47 No.5
본 연구에서는 분무건조법을 이용하여 젖산세균을 녹말로 캡슐화한 분말을 제조하고, 제조한 젖산세균 코팅 분말을 이용하여 다양한 수분활성도에 따른 평형수분함량을 측정하여 등온흡습곡선을 확립하고, pH 및 상대습도, 온도에 따른 젖산세균의 보호효과를 알아보고자 하였다. 젖산세균 코팅 분말의 등온흡습곡선은 수분활성도에 따라 평형수분함량이 빠르게 증가하는 sigmoid 형을 나타내었으나 시료간의 유의적인 차이를 나타내지 않았다. 상대습도에 따라 20, 30, 40℃에서 저장하였을 때, 상대습도가 낮을수록, 저장 온도가 낮을수록 젖산세균의 생존율이 높았으며, 시료들 중 생강을 첨가하여 코팅한 젖산세균 분말의 생존율이 가장 높았다. 75%의 상대습도에서 20℃와 35℃에서 각 4주간 저장실험한 결과, 코팅하지 않은 젖산세균은 1주 후 사멸한 반면, 코팅한 젖산세균은 유지되었으며 특히 생강을 첨가하였을 경우 젖산세균 보호 효과가 가장 높았다. 소화 모방 실험을 통해 위액의 낮은 pH에서 녹말 코팅의 보호막 효과를 확인하였다. 이를 통해 녹말로 코팅한 젖산세균 분말은 식품 조성물, 식품 첨가용 조성물로 이용 가능하다. 한편, 프로바이오틱스 제품 제조 시 젖산세균이 8-10 log CFU/g 이상 존재해야 하는데, 본 연구에서는 분무건조 후 약 7-8 log CFU/g로 다소 감소하였지만 이는 사료 조성물 또는 사료 첨가용 조성물로 응용이 가능하다고 생각된다. Lactobacillus is a probiotic that suppresses the growth of pathogens while preventing constipation, diarrhea, and intestinal inflammation. However, various environmental conditions such as pH and temperature affect the growth of Lactobacillus. In this study, Lactobacillus plantarum was encapsulated with starch using a spray dryer to protect the viability of the organism during storage and to increase its acid tolerance. The lower water activity and storage temperature resulting from this method influenced the survival of L. plantarum. In encapsulated Lactobacillus powders, viability of Lactobacillus was increased during storage at 20℃ relative to that of L. plantarum stored at 35℃ in the same water activity conditions. Furthermore, L. plantarum encapsulated in starch with ginger showed increased viability when compared to non-encapsulated L. plantarum stored without treatment. Finally, based on a simulated digestion test, encapsulated L. plantarum survived at a pH of 2, whereas the non-encapsulated L. plantarum did not. Thus, coating the encapsulated powder with these materials was effective in maintaining Lactobacillus viability.