The Relationship between Microbial Characteristics and Glomalin Concentrations of Controlled Horticultural Soils in Gyeongnam Province

김민근,이영한,김혜란,옥용식,허재영,최시림,이상대,신현열,김제홍 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.2

Glomalin has been suggested as an enhancer for soil stability by promoting the aggregation. In this study, weexamined the concentrations of glomalin and microbial characteristics in 25 controlled horticultural soilssampled from Gyeongnam Province. Total glomalin had a significant positive correlation with soil organicmatter (p < 0.01), soil microbial biomass carbon (p < 0.05), and dehydrogenase activity (p < 0.05) in controlledhorticultural soils. In addition, the total glomalin had a significant positive correlation with concentrations oftotal fatty acid methyl esters, Gram-negative and Gram-positive bacteria, fungi, and arbuscular mycorrhizalfungi in controlled horticultural soils (p < 0.001). In conclusion, the concentration of total glomalin could bean indicator of microbial biomass richness for sustainable agriculture in controlled horticultural soils.

Poorly Differentiated Adenocarcinoma in the Injured Mandible Metastasized from Lung Cancer

김민근,이상신,심은주,강길현,이석근,석현,김성곤 대한구강악안면병리학회 2012 대한구강악안면병리학회지 Vol.36 No.3

A 78 year-old male complained of mild pain at a gingival mass on his anterior mandible, injured and ulcerated by autobicycle accident six months ago. He had suffered from uncontrolled diabetes. The tumor specimens from his chin and gingiva were examined by immunohistochemical method, and their microsections showed poorly differentiated polygonal tumor cells, occasionally formed ductal structures. The tumor cells grew infiltratively into adjacent fibromuscular tissue with frequent atypical mitosis, exhibiting the features of poorly differentiated adenocarcinoma. However, in the computed tomography(CT) view a tumor mass was also found in his lung, and diagnosed lung cancer. In the immunohistochemical observation the tumor cells were strongly positive for thyroid transcription factor 1(TTF-1), cytokeratin 7, PCNA, p53, and PIM-1, occasionally positive for p63, but sparsely positive for survivin. The tumor cells were almost negative for S-100, cytokeratin 14, and α-SMA, while the vascular structures in the tumor tissue were conspicuously demarcated by the stains of α-SMA. Taken together, the present case was finally diagnosed poorly differentiated adenocarcinoma,metastasized from lung adenocarcinoma. And it was presumed that the metastatic tumor cells tended to be anchored in the traumatized area of anterior mandible, where the wound healing was undergoing with de novo angiogenesis and the activation of different cytokines and growth factors.

A Case of Pseudosarcomatous Nodular Fasciitis in Cervical Area Mimicking Metastatic Tumor

김민근,송지영,김성곤,박영욱,윤종상,이석근,이상신 대한구강악안면병리학회 2011 대한구강악안면병리학회지 Vol.35 No.2

The present case occurred in the cervical area of 51 years old male, who was generally healthy but recently complained of cervical swelling with mild pain. The tumor recently grew rapidly for 5 months. He was referred from local hospital in the diagnosis of metastatic tumor in cervical lymph. In the biopsy procedure, the tumor mass was ill-defined and not associated with cervical lymph node. The microsection showed a highly proliferative fibrous tissue infiltrative growth into the periphery. The spindle tumor cells were stained red in Masson trichrome stain, and strongly positive for PCNA and β-catenine, and partly positive for α-smooth muscle actin (α-SMA), but negative for S-100 and desmin. The differential diagnosis in primary biopsy examination was made as leiomyosarcoma, malignant schwannoma, and mesenchymal sarcoma. Under the diagnosis of sarcoma the patient was operated for tumor resection including cervical lymph nodes. The tumor mass was tightly attached on the lower border of left mandibular body. After the surgical operation the tumor tissue was more investigated with further immunohistochemical stainings, and discussed with several pathologists in Gangneung area. Finally the tumor was turned out to be a nodular fasciitis with pseudosarcomatous proliferation, and also confirmed that the pseudosarcomatous spindle cells belonged to the myofibroblasts originated from the fibrovascular fascial tissue. The present study demonstrated a rare case of nodular fasciitis, which should be differentially diagnosed from the malignant head and neck tumors.

표고 톱밥배지에서 분리한 배양 진균의 다양성 분석

김민근,심순애,최시림,홍광표 한국버섯학회 2019 한국버섯학회지 Vol.17 No.4

This study was conducted to investigate the diversity of culture-dependent fungal species in the sawdust media of Lentinula edodes. A total of 405 fungi were isolated from the specimens and identified to belong to 24 genera and 42 species. Among the identified 42 species of fungi, 26.2% belonged to Penicillium sp., 9.5% belonged to Trichoderma sp., and 64.3% belonged to others. Especially, Trichoderma harzianum, which is a causal agent of fungal disease in mushroom, was found on all the farms, and showed the highest frequency among the identified fungi. Community analysis showed that the fungal diversity patterns of the samples were similar to each farm and many kinds of fungi existed in the sawdust media at high levels. These results showed that the management of internal environments would be required for the stable cultivation of Lentinula edodes.

관상동맥색전증에 의한 급성심근경색증 4예

김민근,주혜원,강경필,최병돈,박민석,변영섭,고충원,이건주,김병옥 인제대학교 2006 仁濟醫學 Vol.27 No.-

Acute myocardial infarction(AMI) due to coronary embolism can occur in patients with normal coronary artery. Coronary embolism is believed to be a cause of acute myocardial infarction when emergent coronary angiography shows perfectly normal coronary trees, except for the finding of coronary artery occlusion. In this report, we describe four patients with AMI due to coronary embolism who were successfully treated using a thrombus aspiration device and anticoagulation, and those patients had intracardial thrombus arising from the left atrium due to chronic atrial fibrillation and valvular heart disease. Patients with chronic or paroxysmal atrial fibrillation can present with AMI due to coronary embolism, and thrombus aspiration with percutaneous aspiration device is a feasible treatment option for these patients along with anticoagulation the rapy.

차량용 공압식 럼버서포트 시스템의 신뢰성향상에 관한 연구

김민근,배덕근,백승엽,조찬기,박상영 한국신뢰성학회 2023 한국신뢰성학회 학술대회논문집 Vol.2023 No.6

가토의 두정골 결손부 모델에서 수산화인회석에 4-hexylresorcinol을 혼합하여 만든 인공합성골이식재의 골형성효과에 대한 연구

김민근,박용태,김성곤,박영욱,이석근,채원식,Kim, Min Keun,Park, Yong Tae,Kim, Seong-Gon,Park, Young-Wook,Lee, Suk-Keun,Choi, Weon-Sik 대한악안면성형재건외과학회 2012 Maxillofacial Plastic Reconstructive Surgery Vol.34 No.6

Purpose: The aim of this study was to evaluate the effect of 4-hexylresorcinol and hydroxyapatite combination graft on bone regeneration in the rabbit calvarial defect model. Methods: Ten New Zealand white rabbits were used for this study. Bilateral round shaped defects (diameter: 8.0 mm) were created on the parietal bone. 4-hexylresorcinol and hydroxyapatite combination graft material was grafted into the right parietal bone defect area (experimental). The left bone defect area was not filled with anything (control). The animals were sacrificed at 4 weeks and 8 weeks after grafting. A micro-computerized tomography of each specimen was taken, and the specimens were stained for histological analysis. Results: The average value of bone mineral density (BMD) and Bone volume (BV) was higher in the experimental group than in the control group at 4 weeks and 8 weeks after surgery. However, the difference was not statistically significant (P>0.05) at 8 weeks after grafting. The BMD and BV in the experimental group at 4 weeks after surgery was significantly higher than those in the control group (P<0.05). Conclusion: 4-hexylresorcinol and hydroxyapatite combination graft material showed higher initial bone formation than the control, however, there was no difference at 8weeks after operation.

Influence of Chinese Milkvetch (Astragalus sinicus L.) with No-tillage on Soil Biotic Factors and Rice Yield

김민근,이영한,Tae Ho Kang,윤한대 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.6

The bacterial community, biotic factors, and rice yield of Chinese Milkvetch (Astragalus sinicus L.) with no-tillage and conventional chemical fertilizer treatment were evaluated. Analysis of bacterial isolates from each treatment plots with 16S rDNA sequences revealed 486 isolates from 18 different bacterial species. The frequency of spore-forming bacteria, including Bacillus sp. and some Actinomycetes appeared to be high under low temperature conditions, whereas Proteobacteria disappeared at low temperature. Most extracellular hydrolytic enzyme activity showing bacteria belong to low G + C Gram(+) bacteria (LGCGPB) compared to high G + C Gram(-) bacteria (HGCGPB) and Proteobacteria. In addition, the total soil carbon content in Chinese Milkvetch treated soil was higher than that of conventional tilled soil samples. Rice yield was slightly higher in the conventionaltilled field (4.13±0.08 Mg/ha) compared to the Chinese Milkvetch-treated field (3.94±0.15 Mg/ha). However, the field treated with Chinese Milkvetch followed by no-tillage was effective in sustaining LGCGP bacterial species that promote biogeochemical cycling and enrich microbial biomass on paddy soil (3.94±0.15 Mg/ha). These results showed that the Chinese Milkvetch treatment with no-tillage is effective in conserving the soil environment without significant yield loss.

경남버섯연구 현황 및 계획

김민근 한국버섯학회 2019 버섯 Vol.23 No.2

시계열 분석을 이용한 전기자동차 수요예측

김민근,장성호 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.추계

The hottest conversation topic in motor vehicle industry now is environment-friendly car. After the rapid rise of oil price in 2008, most themes of motor shows in many countries became environment-friendly car. As the global issues of oil resource depletion and global warming combined with the interest in motor vehicle industry trying to secure new growth driving power and next generation leadership, environment-friendly car is no longer a matter in the future but it became an ongoing task. Different from existing studies which used regression analysis, this study analyzed the sales data of electric car by way of time-series analysis, which is being widely applied to the demand forecast in various fields including finance, economics and trading. The sales data of electric car from 1999 till 2013 was used in the forecast of electric car demand by way of model identification, parameter estimation of the identified model and suitability test of the model. In addition, clearer electric car demand forecast was sought by analyzing the relationship with the change of oil price. The significance of this study is that it did the demand forecast of electric car by time-series analysis.