• Applied Microscopy
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• 제29권2호
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• pp.201-209
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• 1999

무당개구리 상처치유 과정 중 재생되는 피부 상피세포의 형태학적 특성을 관찰하기 위하여 투과전자현미경을 이용하였다. 상처유도 추 재형성과정 중의 표피는 재생되는 상피세포에 의해 $3\sim4$층을 형성하였으며, 세포들의 크기는 상충에서 하층으로 갈수록 크게 신장되어 있음이 관찰되었다. 세포 간격 또한 세포층의 기저부를 향할수록 넓어졌다. 기저층에 위치한 세포는 세포질 돌기들을 내어 데스모소옴이 형성되어 있었고, 원주형이었다. 기저막이 형성된 세포들 사이에는 원기세포들이 위치하고 있었으며, 이 세포들은 불규칙한 난형 또는 타원형으로 세포의 크기는 다른 세포들에 비해 작게 관찰되었다. 따라서, 상피조직은 재생될 때 원기세포들의 분열과 이동이 동반되어야 하므로, 무당개구리 상피는 시간이 경과함에 따라 정상조직과 동일하게 재생될 수 있을 것으로 생각된다. 본 연구에서 상처가 치유된 시점으로 확인된 31일 경의 상피조직의 관찰 결과 역시 추측했던 점과 일치되어 정상과 동일한 조직학적 구성을 이루고 있었다. 또한 재형성 과정 중 상피는 피부가 정상조직으로 형성되기 전까지 수분유실을 막는 방어벽으로서의 기능과 허물을 벗는데 관여하는 것으로 확인되었다.

• 한국임상수의학회지
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• 제32권6호
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• pp.548-550
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• 2015

1세령 암컷 고슴도치의 앞다리 피하에서 종괴가 발견되어 내원하였다. 육안적으로 앞다리 피하종괴는 직경 약 4 cm 크기로 융기되어 있었다. 종괴의 단면상에서 중심 부위는 암적색이었으며, 그 주위에 유백색 결절이 무수히 매몰되어 있었다. 병리조직학적으로 진피층에는 다량의 종양세포들이 불규칙한 줄 또는 시트형태를 이루고 있었다. 대부분의 종양세포들은 기저막에 울타리 모양으로 배열되어 있었으며, 종양세포무리의 중심부에서는 건락괴사를 관찰할 수 있었다. 또한 종양세포들은 주변조직으로의 침습성을 보이고 있었다. 면역조직화학염색을 실시한 결과, 종양세포들은 vimentin에는 음성반응을 보인 반면, pancytokeratin에는 강한 양성반응을 보였다. 이상의 육안적인 특징, 병리조직학적 소견 및 면역조직화학적 검사를 바탕으로 본 증례는 기저세포암종으로 진단하였다.

• 대한한방내과학회지
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• 제21권5호
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• pp.805-811
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• 2000

Objectives : To determine the effects on blood flow of vertebrobasal vascular system in cerebral infarction, Methods : We altered 33 normal patients and 12 patients who were diagnosed cerebral infarction on Rt. middle cerebral artery(MCA) region and 8 patients who were diagnosed cerebral infarction on Lt, MCA region, and measured the mean velocity, systolic to diastolic rate(SD rate), asymmetrical index(A/I) by TCD. Results : The mean velocity of posterior cerebral artery(PCA), vertebral artery was increased in same direction as infarcted site and the mean velocity of basal artery was more increased than control, and the SD rate of PCA, vertebral artery, basal artery was larger than control. The A/l of PCA, vertebral artery was revealed that mean velocity of vertebrobasal vascular system is increase the same direction as infarcted area. Conclusion : TCD examination within 7 days(acute stage) after stroke can help to predict the infarcted direction.

• Journal of Korean Neurosurgical Society
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• 제30권3호
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• pp.384-388
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• 2001

A 51-year-old woman presented with sudden severe headache, vomiting, and right hemiparesis at first admission. Computed tomography(CT) scans revealed an hemorrhagic density at left basal ganglia. Preoperative cerebral angiography showed no vascular lesion. Under the diagnosis of hypertensive intracerebral hemorrhage(ICH), total extirpation of hematoma was done. The postoperative neurological condition improved gradually and discharged without any neurological sequelae. Two months later, she revisited with headache, vomiting and progressive right hemiparesis. CT scans at second admission showed an irregular rim enhanced mass with central low density with surrounding edema at the initial bleeding area. Repeated craniotomy was performed and the mass was partially removed. The histopathological diagnosis of the specimen was confirmed as glioblastoma. The authors report a glioblastoma, which occurred at initial ICH site and regarded as a brain abscess with literature review.

• 농업과학연구
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• 제50권2호
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• pp.295-304
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• 2023

Synbiotics help to improve gut health by promoting the growth of beneficial bacteria while glyconutrients provide a source of energy for the gut bacteria and may also have immunemodulating effects. The aim of the present study was to assess the effect of this combination on fatty acid and meat quality characteristics of growing pigs. In a five-week experiment, 804 growing three-way crossbred ([Landrace × Yorkshire] × Duroc) pigs with an initial body weight of 31.90 ± 2.6 kg on average were assigned to two treatments: 1) CON (basal diet) and 2) TRT1 (basal diet + 0.3% glycozyme [synbiotics and glyconutrient]), each consisting of 402 pigs. The TRT1 groups showed significantly higher values of palmitoleic acid (C16:1), capric acid (C10:0), myristic acid (C14:0), lauric acid (C12:0), elaidic acid (C18:1, t), pentadecylic acid (C15:0), gondoic acid (C20:1), lignoceric acid (C24:0), and omega-6 : omega-3 in fat than the CON groups. Moreover, in the lean tissues of the pig, the levels of C12:0, C14:0, C17:0, and C20:1 were significantly higher in TRT1 than in CON. However, significant differences were not observed after glycozyme addition in pH, water holding capacity, cooking loss, longissimus muscle area, drip loss, meat color, and sensory evaluation parameters. To conclude, the positive results of the fatty acid composition indicate that glycozyme may be an effective pig feed additive.

• Journal of Animal Science and Technology
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• 제52권2호
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• pp.103-110
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• 2010

본 연구는 약용식물(Artemisia, Acanthopanx and Garlic)이 함유된 배합사료 급여시 돼지의 생산성에 미치는 영향을 알아보기 위해 실시하였다. 시험 1은 모돈 90두 공시하였다. 시험 설계는 1) CON (basal diet), 2) BM1 (basal diet +약용식물 0.1%) 및 3) BM2 (basal diet +약용식물 0.2%)로 3개 처리로 하였다. 등지방두께 변화량은 대조구에 비해 약용식물 급여 처리구가 낮은 감소량을 나타내었다(P<0.05). 자돈의 증체량은 대조구에 비해 약용식물 급여처리구가 높은 증체량을 나타내었다(P<0.05). 하지만, 모돈 사료섭취량, 직장온도 및 자돈의 생존율에서는 처리구간 차이를 나타내지 않았다. 시험2는 비육돈에 약용식물 급여시 생산성이 미치는 영향을 알아보기 위해 실시하였다. 시험 개시시 체중이 $65.21\;{\pm}\;0.04\;kg$인 3원 교잡종(Landrace ${\times}$ Yorkshire ${\times}$ Duroc)의 비육돈 60두를 공시하였으며, 8주간 사양시험을 실시하였다. 시험 설계는 1) CON (basal diet), 2) BM1 (basal diet +약용식물 0.1%) 및 3) BM2 (basal diet +약용식물 0.2%)로 3개 처리를 하여 처리당 5반복, 반복당 4두씩 완전임의 배치하였다. 4~8주와 전체기간에서 일당증체량에서 약용식물처리구가 대조구에 비해 유의적으로 높게 나타내었다(P<0.05). 등심의 pH와 가열감량에서는 CON 처리구가 BM1 처리구에 비해 유의적으로 높게 나타내었다(P<0.05). 보수력과 육즙감량에서는 대조구에 비해 약용식물 처리구가 유의적으로 높게 나타내었다(P<0.05). 육색, 지방산패도 및 등심단면적에서는 처리구간 차이를 나타내지 않았다. 결론적으로 비육돈에서는 일당 증체량, 보수력 및 가열 감량에서 효과를 나타내었으며, 모돈에서는 등지방두께 감소율과 복당증체량에 효과를 나타내었다.

• Journal of Ecology and Environment
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• 제39권1호
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• pp.1-10
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• 2016

Despite it has been mentioned that the successful restoration in landscape level was achieved in the Young-il soil erosion control project, quantitative evaluation of restored plant communities (Alnus firma as introduced species and Pinus thunbergii as native species) was hardly founded. Light availability, litter and woody debris cover, and forest structure and composition were determined for 500 m² band-quadrat in three forest types. Abiotic factors of Q. serrata stands, as reference forest, and A. firma stands were similar but not for P. thunbergii stands. There were no significant difference on mean stem density (stems ha^-1, H = 3.6, p = 0.162), and the mean basal area of each stand had marginal significance (m² ha^-1, H = 5.7, p = 0.058) among stands as total basal area was higher with the order of A. firma (21.4 m² ha^-1), P. thunbergii (19.8 m² ha^-1) and Q. serrata (16.2 m² ha^-1). Restoration of vegetation structure was more effective in fast-growing and N-fixing A. firma, as introduced species plantation. However, result of MRPP, NMS ordination and ISPAN for herbaceous layer, not for tree and shrub species composition, indicated that restoration of ground vegetation was likely influenced highly from local environment. Propagule availability from landscape context such as connectedness to natural vegetation and management practices in restored isolated stands are available explanations for restoration effects and gaps between restored plantations and secondary oak forest.

• Journal of Ecology and Environment
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• 제44권2호
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• pp.90-97
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• 2020

Background: Natural forests are generally considered to be less prone to biological invasions than other modified ecosystems, particularly when canopy cover is high. Few decades of management of degraded forests by local communities in Nepal has increased canopy cover and altered disturbance regimes. These changes might have reduced the abundance of invasive alien plant species (IAPS) in forests. To understand the status of IAPS in such forests, we studied two community managed Shorea robusta forests (Sundari and Dhusheri) of Nawalpur district in central Nepal. In these two forests, vegetation sampling was done using circular plots 10 m radius at forest edge, gaps, and within canopy. Variation of IAPS richness and cover across these microhabitats were compared, and their variation with tree canopy cover and basal area analyzed. Result: Altogether 14 IAPS were recorded in the study forests; among them Chromolaena odorata, Ageratum houstonianum, and Lantana camara had the highest frequency. Mikania micrantha was at the early stage of colonization in Sundari Community Forest (CF) but absent in Dhuseri CF. Both IAPS cover and richness was higher at forest edge and gap than in canopy plots and both these attributes declined with increasing canopy cover and tree basal area. Conclusion: The results indicate that increase in canopy cover and closure of forest gaps through participatory management of degraded forests can prevent plant invasions and suppress the growth of previously established IAPS in Shorea robusta forests of Nepal. This is the unacknowledged benefit of participatory forest management in Nepal.

• Journal of Oral Medicine and Pain
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• 제9권1호
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• pp.11-22
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• 1984

The authors administered KCN, NaF,AS2O3 orally to rabbits and caused acute and chronic poisoning, then studied the teeth, jaw bones, and other oral tissues histopathologically. The results were as follows : 1. There was no significant difference between acute poisoned group by NaF and control group. But, vasodilatation in the connective tissues, esepcially marginal area of jaw bone, atrophy and destrution of glandualr cells was observed. 2. Chronic poisoned group by NaF showed degeneration and thicking of subcutanece fibrosis ective tissues, atrophy and degeneration of subcutaneous connective tissues, atrophy and degeneration of muscle fibers, vasodilation of subcutaneous in bone cavities(lacunae), and degeneration of odotlblasts in pulp tissue. 3. Acute poisoned group by KCN showed almost similar appearances as control group, and chronic poisoned group showed hyperplasia of baal layer in epitheilium, degeneration of subcutaneous connective tissues, vasodilation and huperemia, severe hemorrhage of marginal area of jaw bone. hyperplasia of salivary gland ducts, but normal arrangement of muscle fibers and narrow bone carity(lacunae) due to active osteoblastic action, osteodentin were observed. 4. Acute poisoned group by AS2O3 showed degeneration of basal cell, atrophy of blood vessels in palatal muscosa. Chronic poisoned group showed irregular cell arrangement and degeneration, reduction of capillaries in palatal mucosa. Osteoclasts in jaw bone were observed. 5. In Masson's Trichrome and Van Gieson Staining, chronic poisoned group by NaF showed thicking and loosening of subcutaneous connective tissues. Hyperplasia of intermuscular connective tissue was observed in chronic poisoning by KCN and NaF. In PAS staining, negative reation in outer layer of palatalmucosa, positive reaction in keratin layer and mild reaction of basal layer in palate and tongue mucosa was observed.

• 한국광물학회지
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• 제19권3호
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• pp.139-151
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• 2006

캐나다 온타리오주 코발트지역에는 시생대의 화산암을 부정합으로 피복하고 있는 원생대의 휴로니안 퇴적암 내에는 황화물이 농집된 광화작용이 발달한다. 황화광물들은 원생대에 발달했던 퇴적분지에 쌓인 기저역암 내에 농집되어 있다. 황화광물은 기저역암과 Coleman 역암에서는 파편형태로, 퇴적암 전체에서는 광범위한 산점상 형태, 그리고 Ag-Co-Ni-As 탄산염맥 주변의 산점상 형태 등으로 산출된다. 황화광물 파편들의 형태가 모가 나있고 사암과 이질암에서 점이적 퇴적구조를 나타내고 있는 것으로 보아 황화광물들이 기계적 운반작용에 의해 이동된 후 퇴적암 내에서 광화작용을 이루었음으로 시사한다. 한편, 탄산염맥 근처에서 발견되는 산점상 광석광물들은 열수작용에 의해 형성된 것으로 추정된다. 기반암인 시생대 화산암에 발달한 대규모의 화산성 황화물 광상이 퇴적암에 존재하는 광석광물의 공급원이었음을 알 수 있다. 사암 및 이질암에 존재하던 광석광물들은 후기에 관입한 휘록암에 수반된 열에 의해 재결정작용을 받았다.