• 한국지하수토양환경학회지:지하수토양환경
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• 제28권5호
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• pp.25-35
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• 2023

This study aimed to classify spring types based on the hydrogeological characteristics of springs in Yongsu-ri~Hamo-ri coastal area in western part of Jeju Island. The springs in study area can be broadly categorized into three groups: perched groundwatrer springs (soil type), perched groundwater springs (sediment type), and basal groundwater springs. The perched groundwater springs of soil type correspond to springs where groundwater seeps out from the perched aquifer formed in the soil layer due to the development of clayey Kosan Formation beneath the surface. Because of the low hydraulic conductivity of soil layer, the average of spring discharge is less than 1 m³/day. The quality of spring water is significantly influenced by agricultural activities, resulting in high nitrate nitrogen concentrations and electrical conductivity. While the perched groundwater springs (sediment type) of the Suwolbong Tuff, which are located in the upper part of Kosan Formation, exhibited relatively higher discharge rates, their water quality was similar to soil-type springs. Basal groundwater springs are located in the zone of basal groundwater, mostly near the coastline. This type of spring appears to discharge of up to 3,707 m³, and the salinity content varies with the tidal fluctuations, especially increasing significantly during dry seasons.

• Applied Microscopy
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• 제37권4호
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• pp.209-217
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• 2007

상처회복은 염증, 재상피화 그리고 기질의 재형성등이 관여하는 복잡한 과정이다. 이중 재상피화에 관여하는 각질화세포의 이동경로를 분석하기 위하여 무당개구리 피부 상처유도 후 투과전자현미경과 cytokeratin에 대한 조직면역화학법을 이용하였다. 정상조직의 cytokeratin발현은 기저층의 세포들과 선상피에서 확인되었다. 상처 유도후 3시간 조직에서, 기저세포층에서 강한 반응이 관찰되었고, 1일과 2일 사이에서는 재생되는 각질화세포에서 강한 면역반응이 확인되었다. 상처반응 중기인 7일부터 10일 사이에서도 재생된 세포의 기저층세포에서 강한 반응이 일어났다. 19일경과의 조직에서는 기저층과 유극층의 세포들에서 cytokeratin의 발현이 증가하였다. 따라서, 재상피화에 관여하는 각질화세포는 기저층의 세포로부터 시작하여 상처부위로 이동하여 과립층과 유극층으로 분화됨으로서 재상피가 진행되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제1권1호
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• pp.1-5
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• 1988

Ninety feeder steers, predominantly Herefords weighing 280 kg, were assigned at random to each of nine diets: basal (high concentrate); 25 or 50% of untreated rice straw (25- or 50 URS) or ammoniated rice straw (25- or 50 ARS); a 50:50 mixture of URS - alfalfa or ARS - alfalfa replacing a proportion of the basal at 25 and 50%. Animals were slaughtered after 154 or 161 days of feeding. The cattle fed 50% URS had the lowest (P<.05) carcass weight, dressing & external fat thickness, kidney, pelvic and heart fat, rib eye area, marbling score, quality and yield grades, followed by cattle fed 50% ARS, 50% rice straw/alfalfa, and 25% rice straw alone or 25% rice straw/alfalfa mixture. Ammoniation of rice straw improved all measured traits. A 25% substitution of basal diet with untreated or ammoniated rice straw and a 50% substitution with rice straw/alfalfa mixture did not significantly affect carcass traits compared to the basal group. Only 50% ARS and 50% URS cattle showed differences in body composition (P<.05) with lower fat and higher water and protein contents. No significant differences were found in shear value, panel tenderness, connective tissue, juiciness, flavor and overall palatability of meat from steers fed the basal, ARS or URS diets.

• 치과방사선
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• 제25권2호
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• pp.343-362
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• 1995

The purpose of this study was to investigate chronic radiation effects on the basal cell of the rat tongue epithelium according to different irradiation timing. Forty-two female rats were devided into 5 experimental groups according to different irradiation timing and were irradiated single dose of 396cGy by MK cell irradiator using Cs-137. Experimental rats were sacrificed at the 2nd week, 4th week and 6th week after birth. The specimens were examined with light microscope and transmission electron microscope. The following results were obtained. 1. The first changes after irraditation were vacuoles. The vacuoles were chiefly observed in the cytoplasm, perinuclei area, and nuclei. 2. The most severe degenerative changes in the basal cell layer were observed in all experimental groups. ; cellular disarrangement, vacuole formation, widening of intercellular space, enlarged mitochondria & rER, and chromatin clumping were seen. 3. The cellular degenerative changes were most severe at the 4th week after birth in all experimental group, and the basal cell hyperplasia was seen at the 6th week in the most of experimental groups 4. The experimental groups 3 and 4 show more severe and more prolonged cellular degeneration than experimental groups 1 and 2, which were irradiated in pregnancy, and experimental group 5, which was irradiated after tongue maturation.

• 한국산림과학회지
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• 제96권2호
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• pp.138-144
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• 2007

This study was undertaken to compare the biomass of Abies koreana growing at two sites. A $10{\times}10m$ plot was established in each site of a natural stand in Mt. Jiri and a plantation in Gyeongsan nursery. Five trees of A. koreana were randomly selected in each site. The following traits were investigated from each tree : height, basal diameter, age, weight of stem, branches, and needles as above-ground traits and weight of total roots, horizontal roots, and vertical roots as below-ground traits. In Gyeongsan nursery, age of sample trees was negatively correlated with both height and weight of total stem, while height was highly correlated with weight of horizontal roots. There was high correlation between the basal diameter and weight of total stem, and between the basal diameter and weight of roots. In Mt. Jiri stand, most of the above-ground traits except age were significantly correlated with the below-ground traits. The linear regression equation between the cross section area of base (X) and the weight of total stem (Y) in Gyeongsan nursery was Y=12.66X-12.92, and correlation was significant ($R^2=0.89$). The linear regression equation between the cross section area of base(X) and the weight of total branches (Y) in Mt. Jiri stand was Y=25.51X+6.00, and correlation was highly significant ($R^2=1.0$).

• 한국연초학회지
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• 제4권1호
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• pp.51-59
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• 1982

This experiment was conducted to investigate the effects of fertilization level, additional dressing time and form of nitrogen on the growth and formation of Alkaloid in flue-cured tobacco. The results are abstracted as follows. Length and width of harvested leaves, area of a leaf, leaf area per plant, number of harvested leaves, weight of a leaf, and leaf weight of a plant were larger in the $NO_3$-N plot than $NH_4$-N plot. Length, width and area of the middle leaves increased by additional dressing on 7 days before topping, but the dry weight Per unit leaf area of those was decreased. Leaf shape was broaden in additional dressing plots in comparison with 100% of basal dressing plot, but there is no difference among the additional dressing plots. And the smallest leaf shape index was shown at upper leaves in 100% of basal dressing Plot. Leaf weight of a Plaint was the highest in 12kg/10a Plot among $NO_3$-N form and in 12kg/10a plot among $NH_4$-N form. Total Alkaloid content was higher in $NH_4$-N plot between fertilization forms, and highest in 15kg/10a plot among fertilization levels and at the position of middle and upper leaves in the plot of 7 days before topping among additional dressing times.

• 한국산림과학회지
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• 제84권2호
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• pp.186-197
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• 1995

경기도 양평 지역에 생육하고 있는 리기다소나무, 낙엽송, 졸참나무 임분의 지상 부위 생체량과 엽면적을 추정하기 위해 흉고직경, 흉고단면적, 변재단면적, 변재부피 등의 변수를 이용하는 회귀식을 조제하였다. 지상 부위 생체량과 엽면적은 흉고직경, 흉고단면적, 변재단면적, 변재부피 등과 각각 통계적으로 유의한 상관 관계를 보였으며, 비슷한 직경급에서 3수종 모두 유사한 수간목부 생체량을 보였다. 그러나 수피, 잎, 가지와 지상 부위 총생체량과, 단위건중량당 엽면적 그리고 엽면적 변재단면적의 비에 있어 수종 간 차이가 뚜렷하였다. 생체량과 엽면적 추정을 위한 회귀식은 대상 수중의 잎의 습성과 수병에 영향을 받는 것으로 보이며, 이들 영향을 보다 확실하게 구명하치 위해서 상세한 연구가 필요한 것으로 사료된다.

• Journal of Plant Biology
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• 제24권1호
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• pp.47-57
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• 1981

1979년 및 1980년에 경기도 광릉과 양주군 수동면에서 저적면적계의 빈도분포의 skewness와 kurtosis를 검정하기 위하여 총 46개의 단일종 조림지에서 개목의 주변장을 흉고에서 재었다. 이들 조림지는 10~50년된 것이며 수종은 잣나무, 낙엽송, 전나무 및 리기다소나무이다. 각 지소에서의 측정수는 70~110이며 저적면적계의 수는 Sturge의 방식에 따랐으며, 5~10계였다. 수동에 있어서 나이(년)와 개목 저적면적($\textrm{cm}^2$)은 각각 10~20 및 27.60~383이었으며, 광릉에서는 15~47 및 102.15~619.14이었다. 한 곳을 제외하고 모든 곳에서 +g$_1$값을 나타냈고, 6개소를 제외하고는 그 값이 0.3~2.2였다. 23곳에서는 유의한 +g$_1$값을 나타냈다. 이들의 저적면적계수는 6~9였다. 이상의 사실은 종내경쟁이 약 10년된 조림지에서도 시작되며 약 50년까지도 계속됨을 시사한다. 24개소에서 -g$_2$값을 나타내며 이들의 값은 -0.12~-0.83의 범위였다. 약 20곳에서는 +g$_2$값을 나타냈으며 그 범위는 +0.13~+3.841이었다. 22개의 +g중 11채는 매우 유의한 것이었다. 단지 5만이 유의한 Kolmogorov-Smirnov 검정결과를 나타냈다. 4종중 낙엽송이 가장 나이 어린 시절에 종내경쟁을 시작하고 그 다음이 전나무 그리고 잣나무의 순으로 경쟁을 시작하는 것 같다. 이 자료는 저적면적계의 빈도분포를 통하여 종내경쟁을 탐지하고자 할 때 적정 계(급)수는 12이상이 아니고 6~9이며 적정 관측목수는 100이상이 아니고 약 80임을 시사한다. 필자는 저적면적의 빈도분포가 종내경쟁이 있을 때에는 bimodal 분포라기 보다는 trimodal 분포를 나타내고 있다고 생각하며 또한 종내경쟁이 약화되어 저적면적빈도분포가 정상분포 단계에 도달되기 전에 바로 platykurtic분포로 되는 것이 아니고 leptokurtic 분포적 단계를 거친다고 본다

• 대한두개안면성형외과학회지
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• 제18권3호
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• pp.191-196
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• 2017

Basal cell carcinoma (BCC) comprising several lesions is not uncommon, but nonsyndromic multiple BCCs with parotid invasion are rare entities. We present two cases of multiple sporadic, nonsyndromic BCCs, and one of these cases is a unique case of parotid invasion associated purely with actinic keratosis. In Case 1, a 79-year-old female presented with multiple skin lesions on the face and left hand. All lesions were completely removed by surgery. The pathologic results showed lesions consistent with BCC and some lesions consistent with actinic keratosis. After 8 months, the patient presented with skin lesions in bilateral temporal areas and left cheek area. Surgical excision of the lesions was performed, and the biopsy results were squamous cell carcinoma in situ and actinic keratosis. In Case 2, a 43-year-old woman presented with multiple skin lesions on the face, scalp, right chest, abdomen and right leg. All lesions were completely removed by surgery. Pathologic evaluation confirmed the diagnosis of BCC. BCC is rarely metastatic, but it can lead to severe disfiguration or destruction. It is important to diagnose and treat BCC at an early stage.

• Imaging Science in Dentistry
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• 제32권3호
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• pp.141-145
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• 2002

Purpose : The purpose of this study was to propose standard values for alveolar and basal bone in normal adult mandibles, and radiologically analyze the remodeling process of the edentulous mandible by examining molar areas and comparing them to the established normal values. Materials and Methods : Panoramic and CT scans of mandible were performed on 20 normal adults and 20 edentulous or partially edentulous adults. In both groups, arch half diameter and distance of alveolar bone were measured. Also the distance from the mandibular canal to the caudal edges, the buccal and lingual external borders of basal bone, were measured. A statistical comparison between the mean values of normal and edentulous mandibles was carried out in the selected areas. Results : There was evidence of decreasing arch half diameter and distance in the edentulous mandible, but statistically no significant change was seen between the normal and edentulous alveolar bone. There was evidence of decreasing buccal basal bone and increasing in the lingual basal bone in the edentulous mandible. A statistically significant difference between normal and edentulous mandibles was noted in the buccal basal bone. Conclusion: There was an inward and forward atrophic change of the edentulous mandibular molar area compared to the control. CT scanning required the use of sophisticated and expensive procedures to analyze the remodeling process of edentulous mandibles. Consequently, the development and application of a more simplified and objective radiographic procedure for broad and long-term study of remodeling procedures of edentulous mandible was recommended.