• Journal of the Korean Society for Precision Engineering
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• v.9 no.4
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• pp.36-43
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• 1992

This paper presents a hierarchical real-time operation control and monitoring scheme of the FMS/CIM center which has been implemented at the Automation and Systems Research Institute of Seoul National University. The hierarchical structure of the whole scheme consists of three lavers. The upper layer is in charge of on-line scheduling, computer network control, shop-floor monitoring and command generation for AGV dispatching, machining, assembly, inspection, set-up, etc. The middle layer has six modules, which are installed in the FMS host computer with the upper layer and run on the multi-tasking basis. Each module is connected to one of six cell controllers distributed in the FMS model plant and transfers operation command down to each cell controller through the Ethernet/TCP-IP local area network. The lower layer is comprised of six cell control software modules for machining cell, assembly cell, inspection cell, set-up stations. AS/RS and AGV. Each cell controller reports the status of the manufacturing facilites to the middle layer as well as ecxecuting the appropriate sequence control of the manufacturing processes.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.2
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• pp.274-278
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• 1996

토마토 과실의 연화현상의 주 원인으로 판단되는 세포벽의 형태적 변화를 조사하기 위하여 성숙 단계별로 취하여 과실의 경도, 세포벽 구성 성분의 변화 및 세포벽의 변화를 조사하였다. 과육의 경도는 적숙기 이후부터 급셕한 감소를 나타내었다. 세포벽 함량은 성숙 중에 감소하였고 가용성 펙틴의 증가와 불용성 펙틴의 감소는 적숙기와 식용 적기 사이에서 가장 현저했으며, 총 펙텐의 함량은 다소 감소하는 경향을 나타내었다. 성숙에 따른 토마토 과육의 세포 및 세포벽의 형태적 변화를 현미경으로 관찰한 결과, 수확기까지의 토마토에서는 middle lamella와 세포내 기관들이 잘 관찰되었으나, 연화가 진행됨에 따라 식용 적기의 토마토에는 middle lamella를 관찰할 수 없었으며 과숙기 에서는 middle lamella의 가용화와 함께 세포벽의 부분적인 분해와 세포분리현상이 관찰되었다.

• Journal of Korean Neurosurgical Society
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• v.30 no.10
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• pp.1229-1232
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• 2001

A rare case of tenosynovial giant cell tumor of invading left temporomandibular joint(TMJ) extending the middle cranial fossa is reported. Report of this entity in the temporomandibular joint is rare. A 39-year old male patient presented with mild discomfort and swelling in preauricular area. MR image demonstrated a destructive lesion of the left TMJ, with bony erosion of temporal bone and extension into middle cranial fossa. The patient underwent radiotherapy as adjuvant therapy to prevent recurrence, followed by resection. The histological and radiological features of this tumor are discussed along with a brief description of the disease entity.

• YAKHAK HOEJI
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• v.43 no.6
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• pp.709-715
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• 1999

Polyphenol oxidase (PPO) activity in 200×g (cell wall), 4,000×g (plastid), 100,000×g (mitochondrial) and soluble fractions of the perilla leaves was monitored in the upper, middle and lower sections of the plant. In the course of plant growth, PPO activities in plastid and mitochondrial fractions were decreased, while those in cell wall fraction were maintained. During growing process, specific activities and PPO activities of each fraction were decreased, while total phenol content were decreased in middle (middle) and then increased in later stage (lower). Cell wall, plastid, mitochondrial (pellet) and soluble fraction had slightly different pH optima and substrate specificities. Isoenzyme patterns were identical in two bands for PPO activity in different subcellular fractions. Their molecular weights were 37KD and 48KD respectively.

• Food Science and Preservation
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• v.3 no.1
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• pp.93-104
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• 1996

The cell wall components of fruit include cellulose. hemicellulose, pectin, glycoprotein etc., and the cell wall composition differs according to the kind of fruit. Fruit softening occurs as a result of a change in the cell wall polysaccharides : the middle lamella which links primary cell walls is composed of pectin. and primary cell walls are decomposed by a solution of middle lamella caused due to a result of pectin degradation by pectin degrading enzymes during ripening and softening, During fruit ripening and softening, contents of arabinose and galactose among non-cellulosic neutral sugars are notably decreased, and this occurs as a result of the degradation of pectin during fruit repening and softening since they are side-chained with pectin in the form of arabinogalactan and galactan Enzymes involved in the degradation of the cell wall include polygalacturonase, cellulose, pectinmethylesterase, glycosidase, etc., and various studies have been done on the change in enzyme activities during the ripening and softning of fruit. Among cell wall-degrading enzymes, polygalacturonase has the greatest effect on fruit softening, and its activity Increases during the maturating and softening of fruit. This softening leads to the textural change of fruit as a result of the degradation of cell wall polysaccharides by a cell wall degrading enzyme which exists in fruit.

• Journal of Plant Biology
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• v.36 no.3
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• pp.285-292
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• 1993

Cellular compatibility in the self-parasitism of Cuscuta australis R. Brown was studied at the ultrastructural level. The front cells of the haustorium penetrated the host stems independently grew within the host tissues and transformed into elongate, filamentous hyphae. Each hyphal cells contained a large nucleus and dense cytoplasm with abundant cell organelles. Multilamellar structures were contained in the cytoplasm and cell walls of the penetrating hyphal cells. When the hyphal cells did not yet invade the host cells, the middle lamella and the fused cellulosic cell walls of the two partners at the host-parasite interface were preserved well. As the invasion of the parasitic hyphal cells progressed, however, the middle lamella was not found at the interface and the host cell walls and plasma membranes were partially broken down. A hyphal cell penetrated deeply into the host cell had a more darkly stained cytoplasm with numerous of cell organelles. In the host cells attacked by the hyphal cells the limiting membranes of plastids were broken down and several vesicles were arrayed near the cell walls. No plasmodesmatal connections between the host and parasite cell walls were found; however, half-plasmodesmata were observed frequently on the side of the hyphal cell walls. These results suggested that the compatibility response in the self-parasitism of Cuscuta was expressed by cell walls, not by plasmodesmata, between the host and the parasite cells.

• Journal of the Korea Convergence Society
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• v.11 no.10
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• pp.155-162
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• 2020

This study wanted to confirm the relevance between body mass index(BMI) and insulin resistance and beta-cell function based on abdominal obesity in obese middle-aged men. This study targeted 797 obese middle-aged men who had undergone health checkups at general hospitals in Gyeonggi-do from January 2018 to June 2020. There were 327 in the group with abdominal obesity and 470 in the group without abdominal obesity. Glucose(p<0.001), HbA1c(p=0.003), insulin(p<0.001), HOMA-IR(p<0.001) was different between groups. BMI was a factor affecting insulin resistance and beta cell function regardless of the with or without of abdominal obesity. BMI was associated with the onset of disease of insulin resistance and beta cell functional degradation regardless of the with or without of abdominal obesity. Therefore, it is considered necessary to manage the indicators of the BMI through exercise programs and regular checkups for health management of middle-aged obese men.

• Journal of Korean Foot and Ankle Society
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• v.6 no.1
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• pp.117-120
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• 2002

We experienced 1 case of the giant cell tumor of the tendon sheath penetrating the middle phalanx of the third toe. Patient had painless huge mass all around the third phalanx of the foot which made a penetrating hole through the middle phalanx of the third toe in plain radiography. The period from the onset of the symptom until operation was about several years. The mass extended to the base of the distal phalanx and compressed digital nerves and vessels. Patient presented with a chief complaint of the pain on the plantar aspect of the toe and limitation of the motion of the distal interphalangeal joint. Giant cell tumor of the tendon sheath was cured by total en block resection.

• Journal of Chest Surgery
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• v.27 no.10
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• pp.878-881
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• 1994

Primary malignant lymphomas of the lung are rare and known often to be localized, solitary pulmonary lesions, in chest radiograph. Because they are highly treatable contrast to the other primary lung cancer, the distinction is important. A 35-year old man who was admitted for a solitary pulmonary nodule in the right middle lobe. Percutaneous needle aspiration disclosed diffuse, small cell lymphoma. Bone marrow biopsy showed no evidence of neoplastic lymphoid cell infiltration. There were a walnut sized mass involving right middle lobe with a small satellite nodule at 2cm distal to the right upper lobe bronchial orifice. The histopathology of the bilobectomized specimen showed diffuse, small cell, malignant, non-Hodgkin`s lymphoma. Immunologic subtype was defined as B-cell type.

• The Korean Journal of Malacology
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• v.16 no.1_2
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• pp.1-9
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• 2000

The visceral ganglion and the right parietal ganglion of the African giant snail, Achatina fulica, consists of two hemispheres, each in left and right side, respectively, like a butterfly. The surface of cortex and medulla in the two ganglions are crowded with nerve cells, but nerve fibers form a network at the middle portion. The nerve cells in the cortex and medulla of the visceral ganglion and the right parietal ganglion are classified into the following four classes according to their sizes: giant (above 200 ${\mu}{\textrm}{m}$, in diameter), large (60-70 ${\mu}{\textrm}{m}$, in diameter), middle (30-40 ${\mu}{\textrm}{m}$, in diameter) and small (10-15 ${\mu}{\textrm}{m}$, in diameter) nerve cells, respectively. The giant and large nerve cells are rarely found(20-22 eas. in total) while the middle and small nerve cells are found in large quantities (middle: 400-500 eas., small: 700-800 eas.). In the AB/AY double staining, the giant nerve cell is identified as light yellow cells (LYC), while large and middle none cells as dark green cells (DGC) or yellow green cells (YGC), and small nerve cells as yellow cells (YC) or blue cells (BC), The DGC, which reacts positively to somatostatin immunostain reaction, inhibits the secretion of the growth control hormone. The giant and large nerve cells are identified to do the functions of phagocytosis as well as neurosecretion.