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이도현 ( Lee¸ Do-hyeon ),장민기 ( Jang¸ Min-ki ),유리나 ( Yoo¸ Li-na ) 한국식품유통학회 2021 한국식품유통학회 학술대회 Vol.- No.하계
본 연구는 우리나라 필수 양념채소인 마늘(난지), 양파 재배농가의 생산효율성을 제고 시키기 위한 요인을 밝히고 있다. 자료포락분석 결과 마늘(난지), 양파 재배농가 모두 비효율의 원인이 순수 기술적 요인이 크게 작용하는 것으로 나타났다. 비효율 요인을 찾기 위해 실시한 Tobit 분석 결과에서 마늘 재배농가의 경우 농약비가, 양파 재배농가의 경우 수도광열비와 자가노동비가 생산효율성에 부정적인 영향을 미치는 것으로 나타났다. 이를 통해 순수 기술효율성 제고를 위한 투입 요소의 전반적인 재점검이 필요한 시기임을 시사한다.
Laser Edge Isolation for High-efficiency Crystalline Silicon Solar Cells
Dohyeon Kyeong,Muniappan Gunasekaran,김경해,Heejae Kim,Taeyoung Kwon,Inyong Moon,김영국,Kyumin Han,이준신 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
Edge isolation is an important step in industrial type solar cell processes. The POCl3 emitter diffusion technique makes thin n-doped layers on all of the surfaces of the device, including the edges and the rear surface. The front and the back contacts are connected to this n-layer around the edge, which results in shunts. In this research, we used laser edge isolation to remove these shunts, thus obtaining results on the solar cell parameters. Usually, edge isolation is carried out at the end of the solar cell process; however, we altered the process steps so that the edge isolation was carried out before the SiNx deposition. This passivates the laser-induced damage. Various laser edge isolation conditions were studied by comparing the final solar cell efficiencies. From our results, we confirmed that laser edge isolation prior to SiNx deposition is good. Edge isolation is an important step in industrial type solar cell processes. The POCl3 emitter diffusion technique makes thin n-doped layers on all of the surfaces of the device, including the edges and the rear surface. The front and the back contacts are connected to this n-layer around the edge, which results in shunts. In this research, we used laser edge isolation to remove these shunts, thus obtaining results on the solar cell parameters. Usually, edge isolation is carried out at the end of the solar cell process; however, we altered the process steps so that the edge isolation was carried out before the SiNx deposition. This passivates the laser-induced damage. Various laser edge isolation conditions were studied by comparing the final solar cell efficiencies. From our results, we confirmed that laser edge isolation prior to SiNx deposition is good.
Non-B, Non-T Acute Lymphoblastic Leukemia in a Cat
DoHyeon Yu 한국임상수의학회 2023 한국임상수의학회지 Vol.40 No.4
A 7-year-old neutered male, domestic shorthair cat presented anorex- ia and lethargy. The complete blood cell count revealed severe non-regenerative anemia, lymphocytic leukocytosis, neutropenia, and thrombocytopenia. On the peripheral blood smear examination, medium to large lymphoblastic cells with moderate amounts of basophilic cytoplasm were observed in up to 70% of peripheral leukocytes. Feline leukemia and immunodeficiency viruses were not detected using a commercial diagnostic kit. While splenomegaly and blunt mar- gins of the caudoventral liver were observed in abdominal radiography, changes in the intra-abdominal lymph nodes were not remarkable. Ultimately, flow cy- tometric immunophenotyping from the peripheral blood revealed a negative for B-cell markers (CD21–/CD79a–) and T-cell markers (CD3–/CD4–/CD5–/CD8–). Based on the hematological examination and the immunophenotyping assay, the cat was diagnosed with non-B, non-T acute lymphoblastic leukemia. Here, we report a rare case of non-B, non-T acute lymphoblastic leukemia to raise awareness and provide information on clinical symptoms and laboratory test and immunophenotyping analysis results.
( Dohyeon Lee ),( Sunho Park ),( Daun Kim ),( Hyeun Nam ),( Jangho Kim ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.1
Biocompatible capsules have recently been highlighted as novel delivery platforms of any “materials” (e.g., drug, food, agriculture pesticide) to address current problems of living systems such as humans, animals, and plats in academia and industry for agriculture, biological, biomedical, environmental, food applications. For example, biocompatible alginate capsules were proposed as a delivery platform of biocontrol agents (e.g., bacterial antagonists) for an alternative to antibiotics, which will be a potential strategy in future agriculture. Here, we proposed a new platform based on biocompatible alginate capsules that can control the movements as an active target delivery strategy for various applications including agriculture and biological engineering. We designed and fabricated large scale biocompatible capsules using alginates and custom-made nozzles as well as gelling solutions. To develop the active target delivery platforms, we incorporated the iron oxide nanoparticles in the large scale alginate capsules. It was found that the sizes of large scale alginate capsules could be controlled via various working conditions such as concentrations of alginate solutions and iron oxide nanoparticles. As a proof of concept work, we showed that the iron oxide particles-incorporated large scale alginate capsules could be moved actively by the magnetic fields, which would be a strategy as active target delivery platforms for agriculture and biological engineering (e.g., controlled delivery of agriculture pesticides and biocontrol agents).
( Dohyeon Lee ),( Sunho Park ),( Daun Kim ),( Woochan Kim ),( Hoon Seonwoo ),( Jangho Kim ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2
Biocompatible capsules have recently been highlighted as novel delivery platforms of any “materials” (e.g., drug, food, agriculture pesticide) to address current problems of living systems such as humans, animals, and plants in academia and industry for agriculture, biological, biomedical, environmental, food applications. For example, biocompatible alginate capsules were proposed as a delivery platform of biocontrol agents (e.g., bacterial antagonists) for an alternative to antibiotics, which will be a potential strategy in future agriculture. Here, we proposed a new platform based on biocompatible alginate capsules that can control the movements as an active target delivery strategy for various applications including agriculture and biological engineering. In this study, we developed large-scale iron oxide nanoparticle-incorporated alginate capsules and investigated the movement performances of capsules under magnetic fields. The capsules described in this work were generated from ionically cross-linked alginate, and various concentrations of iron oxide nanoparticles were inserted into the capsules. It was found that the sizes of large scale alginate capsules could be controlled via various working conditions such as concentrations of alginate solutions and iron oxide nanoparticles. As a proof of concept work, we showed that the iron oxide particles-incorporated large scale alginate capsules could be moved by the magnetic fields, which would be a strategy as active target delivery platforms for agriculture and biological engineering.
( Dohyeon Lee ),( Kyoung Soon Choi ),( Daun Kim ),( Sunho Park ),( Woochan Kim ),( Kyoung-je Jang ),( Ki-taek Lim ),( Jong Hoon Chung ),( Hoon Seonwoo ),( Jangho Kim ) 한국농업기계학회 2017 바이오시스템공학 Vol.42 No.4
Purpose: Biocompatible capsules have recently been highlighted as a novel platform for delivering various components, such as drug, food, and agriculture pesticides, to overcome the current limitations of living systems, such as those in agriculture, biology, the environment, and foods. However, few active targeting systems using biocompatible capsules and physical forces simultaneously have been developed in the agricultural engineering field. Methods: Here, we developed an active targeting delivery platform that uses biocompatible alginate capsules and controls movements by magnetic forces for agricultural and biological engineering applications. We designed and fabricated large-scale biocompatible capsules, using custom-made nozzles ejecting alginate solutions for encapsulation. Results: To develop the active target delivery platforms, we incorporated iron oxide nanoparticles in the large-scale alginate capsules. The sizes of alginate capsules were controlled by regulating the working conditions, such as concentrations of alginate solutions and iron oxide nanoparticles. Conclusions: We confirmed that the iron oxide particle-incorporated large-scale alginate capsules moved actively in response to magnetic fields, which will be a good strategy for active targeted delivery platforms for agriculture and biological engineering applications, such as for the controlled delivery of agriculture pesticides and biocontrol agents.