• Title/Summary/Keyword: stroma

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Effects of Subatmospheric Pressure Storage on Ultrastructural Changes in the Chloroplasts of Apple Fruit (사과과실 엽록체의 초미세구조 변화에 미치는 감압저장의 영향)

  • Ha, Young-Sun;Sohn, Tae-Hwa
    • Applied Biological Chemistry
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    • v.28 no.3
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    • pp.174-181
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    • 1985
  • Ultrastructural changes in the chloroplast of apple fruits was examined with Malus Pumila Mill var. Fugi harvested during preclimacteric stage the subatmospheric pressure storage condition at 380mmHg, $20^{\circ}C$. Electron micrographs obtained from the fruits stored at 760mmHg, $20^{\circ}C$ indicated that the initiation of ultrastructural changes is in parallel with the onset of respiratory climacteric. Chloroplast of the apple fruits stored for 25 days is vacuolated and the lamellar system are a little disorganized. Chloroplast of the apple fruits stored for 50 days is showing extensive vacuolation, the lamellar system are completely disorganized and the plasma membrane has pulled away from the cell wall. In the case of subatmospheric presssure storage caused to delay the onset of ultrastructural changes in chloroplast such as vacuolation, disorganization of lamellar system and dispersal of stroma lamella about 2 months. These results suggested that ripening of apple fruits is correlated not only to the activity of respiration but to the involvement of ultrastructural changes in fruit cells. The evidences obtained here led to the conclusion that subatmospheric pressure treatment extends storage life of apple fruits by inhibiting ultrastructural changes of cell organelles in concomitance with respiratory activity.

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Pulmonary Blastoma -A Case Report- (폐아세포종 -수술치험 1례-)

  • 금동윤
    • Journal of Chest Surgery
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    • v.27 no.10
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    • pp.868-873
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    • 1994
  • We experienced a very rare case of pulmonary blastoma in a 29 year old female. She complained of left chest pain and dyspnea for 1 month. The characteristic feature of this tumor is it`s biphasic pattern consisting of a spindle cell stroma containing glandular structures. A serial check of simple chest X-ray and computed tomography revealed a growing huge lung mass occupying whole left thorax. We successfully removed the upper lobe of left lung with a huge tumor mass. Pathologic study revealed this tumor as pulmonary blastoma. We report a case with review of literature.

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Ocular Drug Delivery (수의학강좌 I: 점안 안약의 전달)

  • Choe, Hui-Yeon
    • Journal of the korean veterinary medical association
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    • v.47 no.1
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    • pp.42-46
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    • 2011
  • 임상에 있어 눈에 적용하는 약물의 적용은 정상적인 조직을 손상시키지 않으면서 원하는 안구 조직에 목표로 하는 용량의 안약을 전달하는 것이 목적이라고 할 수 있다. 그러나 이러한 간단한 목적도 실제로 환자의 성격, 안구 조직의 민감성, 그리고 친지질성 각막 외피세포(lipophilic corneal epithelium), 친수성 각막 그리고 공막의 간질층(hydrophilic corneal and sclera stroma), 결막의 임파 조직, 맥락막의 혈관 등, Blood-ocular barrier등 안구의 조직 자체의 장벽들로 인해 어려움을 내포하고 있는 것 역시 사실이다. 평소에 처방하고 있는 안약들을 조금 더 효과적으로 전달하기 위해 필요한 눈에 대한 이해에 대해 다루어 보도록 한다.

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Nephroblastoma of the Avian Leukosis/Sarcoma Group (닭 백혈병(白血病)-육종군(肉腫群)의 신배아종(腎胚芽腫))

  • Lim, Chang Hyeong;Mun, Hi Cheol
    • Korean Journal of Veterinary Research
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    • v.14 no.1
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    • pp.49-51
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    • 1974
  • Nephroblastoma of avian leukosis/sarcoma group was encountered in a Shaver pullet. The tumor, measuring $10{\times}5mm$ in base and 5 mm in height, was located on the surface of anterior lobe of the left kidney. The tumor mass was irregular in shape, firm in consistency and greyish white in color. Histologically, the neoplastic tissues consisted of embryonal uriniferous tubules and fibrosarcomatous stroma.

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Ecophysiology of Photosynthesis 1: Effects of Light Intensity and Intercellular $CO_2$ Pressure on Photosynthesis (광합성의 생리생태(1) - 광도와 엽육내 $CO_2$분압 변화에 대한 광합성 반응 -)

  • 김판기;이은주
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.3 no.2
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    • pp.126-133
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    • 2001
  • 녹색식물과 같이 독립영양생물이 빛에너지를 이용하여 $CO_2$와 물로 탄수화물을 만드는 일련의 반응을 광합성이라 한다. 그 일련의 반응 중에서(그림 1) 반응 I과 II는 틸라코이드(thylakoid)에서, 반응 III은 스트로마(stroma)에서, 반응 IV는 엽록체내와 세포질에서 일어나는 반응의 상호작용에 의하여 나타난다. 과거에는 반응 I과 II를 명반응, 반응 III과 IV를 암반응이라 부르기도 하였다.(중략)

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Carcinosarcoma of the Lung - Report of a case - (폐암육종 1예고)

  • 이필수
    • Journal of Chest Surgery
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    • v.22 no.3
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    • pp.498-502
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    • 1989
  • Carcinosarcoma is the group of neoplasms possessing both carcinomatous parenchyma and sarcomatous stroma. These tumors are relatively uncommon and may arise in variable organs. In this case, a 62-year-old male patient was admitted to our department due to left chest pain and general weakness of three months duration. The chest x-ray revealed egg-sized, relatively well defined lobulated soft tissue mass in left paracardiac area. Left lower lobectomy was performed under the preoperative impression of lung cancer. Pathologic examination of the resected lung revealed carcinosarcoma without regional lymph node metastasis. Patient is doing well at present without any chemotherapy.

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Gastric calcifying fibrous tumor of the stomach presenting as a subepithelial tumor

  • Jang, Bogun;Ha, Chang Won
    • Journal of Medicine and Life Science
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    • v.16 no.1
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    • pp.27-30
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    • 2019
  • We describe a case of a 48-year-old Korean woman who had a subepithelial mass incidentally discovered by endoscopic examination. Endoscopic mucosal resection revealed a well-circumscribed whitish solid mass within the submucosal space. Microscopically, the tumor was comprised of sparse spindle cells in the dense collagenous stroma with several calcifications and lymphoid aggregates. Immunohistochemical analysis showed that the tumor cells are negative for c-kit, smooth muscle actin, desmin, S-100 and CD34. Based on these findings, the tumor was diagnosed with calcifying fibrous tumor.

Environmental endocrine disruptors and endometriosis

  • Joung, Ki-Eun;Kim, Ji-Sun;Song, Hye-Weon;Sheen, Yhun-Yhong;Hong, Seung-Kwon;Kang, Soon-Beom;Kim, Ho;Cho, Sung-Il
    • Proceedings of the PSK Conference
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    • 2003.04a
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    • pp.183.1-183.1
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    • 2003
  • Endometriosis is classically defined as the growth of endometrial glands and stroma at extra-uterine sites. Although it is a common gynecological problem accompanied by chronic pelvic pain, infertility, and adhesion formation, the etiology of this disease is unknown. Endometriosis pathogenesis may involve endocrine and immune dysregulation since uterine endometrial growth is regulated by sex hormone in concert with bioactive mediators produced by uterine immune and endocrine cells. (omitted)

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ORAL MANIFESTATIONS OF THE AXENFELD-RIEGER SYNDROME (Axenfeld-Rieger 증후군의 치과적 소견)

  • Kang, Tae-Sung;Choi, Byung-Jai;Kim, Seong-Oh;Lee, Jae-Ho
    • Journal of the korean academy of Pediatric Dentistry
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    • v.30 no.3
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    • pp.510-514
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    • 2003
  • The Axenfeld-Rieger syndrome is a rare autosomal dominant disorder characterized by dental and ocular abnormalities. The essential ocular features include partial or complete bilateral hypoplasia of the iris stroma, abnormalities of the angle structures with congenital iris adhesions, and anterior displacement of Schwalbe's corpuscles. Common oral findings are hypodontia(especially in anterior maxillary segment), microdontia, misshaped teeth, delayed eruption of the teeth. Additionally, other systemic symptoms can be seen and early detection by the pedodontist through dental diagnosis should prevent visual impairment.

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Overexpression of Periostin Protein in Non-Small Cell Lung Carcinoma is Not Related with Clinical Prognostic Significance

  • Park, Won-Young;Shin, Dong-Hoon;Kim, Jae-Ho;Lee, Min-Ki;Lee, Ho-Seok;Lee, Chang-Hun
    • Tuberculosis and Respiratory Diseases
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    • v.72 no.2
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    • pp.132-139
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    • 2012
  • Background: Periostin is preferentially expressed in periosteum, indicating a potential role in bone formation. Recently, there have been emerging controversies about its role in invasion and metastasis of human malignancies. We attempted to determine the clinicopathological significance of periostin expression in non-small cell lung carcinoma (NSCLC). Methods: Immunohistochemical staining of periostin protein from 91 cases of NSCLCs was performed using tissue microarray blocks. The results were correlated with clinicopathological parameters. Results: Positive reaction to periostin was predominantly noted in the tumor stroma. The strongest reaction presented as a band-like pattern just around the tumor nests. Non-neoplastic lung tissue and most in-situ carcinomas did not show a positive reaction in their stroma. With respect to tumor differentiation, moderate to poor differentiated tumors (47/77) revealed even higher periostin expression than the well-differentiated ones (4/14) (p=0.024). High periostin expression was positively correlated with E-cadherin and p53 expression, but was not related with patient age, sex, tumor type, PCNA index, b-catenin, cyclin D1, pTNM-T, pTNM-N, stage, and patient survival (p>0.05). Conclusion: These results suggest that periostin might play a role during the biological progression of NSCLC, but may not be related to the clinical prognostic parameters.