잣나무 毬果무게 및 毬果當種子무게에 미치는 몇개 氣象因子의 影響

朱榮特,全尙根 경희대학교 부설 식량자원개발연구소 1988 硏究論文集 Vol.9 No.-

This study was conducted to know the effect of some meterological factors on the weight of cone and seed per cone in Korean white pine (Pinus koraiensis SIEB. et ZUCC.). The weight of cone and seed per cone for 7 years from l974 to 1980 on 45(1974) year-old trees and some meterological-factors for 9 years form l972 to 1980 were surveyed in Hongcheon-Gun region, Gangweon-Do. Simple correlations and multiple regression between weight of cone and seed per cone and some meterological factors were analyzed. The results obtained from the above experiments were as follows ; 1. Positive correlations were found between weight of cone and X₂, X_(10), X_(11), as well as X_(22) respectively. 2. There were negative correlations between weight of cone and X₃, X₄, X_(5), X_(6), X_(7), X_(8), X_(9), X_(13) as well as X_(14). 3. Positive correlations between weight of seed per cone and X_(5), X_(6), X_(7), X_(11) as well as X_(12) were found. 4. Negative correlations were recognized between weight of seed per cone and X₂, X₃, X₄, X_(9), X_(10), X_(13) as well as X_(14). 5. The equations estimated from multiple regression among weight of cone and some meterological factors were as follows ; Y_(i)=378.73462+5.17899 X₂-9.79481 X₃ Y_(i)=-62.08844-7.41643 X_(9)-0.55197 X_(10)-10.13006 X_(11)-11.41351 X_(12)+7.60457 X_(13) Y_(i)=359.76071-3.80000 X₃-1.92589 X_(5)-0.73423 X_(6)-0.51902 X_(8)+0.20864 X_(14) Y_(i)=199.86570+2.83985 X₂-2.46432 X₃-0.5199 X_(5)+6.28469 X_(7)-0.53510 X_(9) Y_(i)=9.31631+0.12641 X_(11)+0.12641 X_(11)+5.18549 X_(12)-1.23839 X_(13) 6. The equations estimated from multiple regression among weight of seed per cone and some meterological factors were as follows ; Y_(i)=125.74375-3.87758 X₂-3.04731 X₃ Y_(i)=128.59011-1.35191 X₃-26.01429 X₄+0.65898 X_(5)-2.89627 X_(6)+2.83274 X_(7) Y_(i)=105.30285-0.70249 X_(10)-0.83589 X_(8)+0.31191 X_(7)-17.25096 X₄-1.26644 X₂ Y_(i)=86.97105-0.99237 X_(10)-0.83444 X_(8)+2.45465 X_(7) Notes ; Dependent and independent variables used for statistical analysis were as follows ; Y_(i) ; Weight of cone. X₂ ; Monthly mean temperature of Feburary in the flower bud differentiation year. X₃ ; Monthly mean temperature of August in the flowering year. X₄ ; Wind speed of April in the flower bud differentiation year. X_(5) ; Number of clear days of December in the flowering year. X_(6) ; Number of annual cloudy days of the flowering year. X_(7) ; Number of precipitation days of June in the flowering year. X_(8) ; Number of annual precipitation days of the flowerign year. X_(9) ; Number of annual cloudy days of March in the cone production year. X_(10) ; Number of annual hoarfrost days of the cone production year. X_(11) ; Monthly mean temperature of May in the cone production year. X_(12) ; Monthly mean temperature of July in the cone production year. X_(13) ; Number of annual cloudy days from Mach to October in th flowering year. X_(14) ; Number of precipitation from March to October in the flowering year. Y_(i) ; Weight of seed per cone. X₂ ; Monthly mean temperature of January in the flowering year. X₃ ; Monthly mean temperature of August in the flowering year. X₄ ; Wind speed of April in the flower bud differentiation year. X_(5) ; Number of hours with sunshine duration of June in the flowering year. X_(6) ; The percentage of sunshine duration of June in the flowering year. X_(7) ; Number of clear days of June in the flowering year. X_(8) ; Number of clear days of December in the flowering year. X_(9) ; Number of annual cloudy days of the flowering year. X_(10) ; Number of precipitation days of June in the flowering year.

몇個 樹種의 針葉樹 苗木에 對한 SO₂가스의 被害에 關한 硏究

朱榮特,金英彩,李壬均 경희대학교 부설 식량자원개발연구소 1993 硏究論文集 Vol.14 No.-

本 硏究에서 使用된 3個樹種의 供試木인 잣나무, 전나무, 주목의 3∼4年生 苗木에 대한 5개 수준(0, 0.5, 1, 2, 4ppm)의 亞黃酸가스 處理 實驗을 통하여 供試木의 可視的被害 發見 및 葉中 水溶性 硫黃含量 그리고, 體內 葉綠素의 含量, 樹皮酸度, 葉中水分含量을 測定하였던 바 다음과 같은 結果를 알 수 있었다. 1. 亞黃酸가스 處理에 대한 被害症狀의 程度를 가장 敏感하게 나타낸 數種은 供試木中 전나무, 그리고 주목의 順으로 나타났다. 被害樣相은 處理 濃度 2ppm 以下의 低濃度에서는 被害症勢가 發見되지 않았으나, 4ppm의 高濃度 處理에서는 그에 대해 나타나는 被害症勢가 24時間 經過後 잎의 선단부 부터 發見되기 始作하였다. 2. 供試樹種間의 濃度別 葉中 水溶性 硫黃 含量은 亞黃酸가스 濃度가 높아질수록 점차 增加하였고, 樹種別 平均 葉中 水溶性 硫黃 含量은 전나무가 0.076±0.026%로 이들 3개 樹種의 供試木을 통하여 가장 많이 나타났으며, 그 외에 주목은 0.0711±0.018%, 그리고 잣나무는 0.0704±0.019%의 順을 보였다. 3. 供試樹種間의 亞黃酸가스 處理의 濃度別 葉綠素 含量은 Gas의 濃度가 높아질수록 점차 減少하였는데, 樹種別 Total 葉綠素 含量은 주목이 4.704±1.33 ㎎/g으로 가장 많았으며, 전나무는 3.597㎎0.82 ㎎/g, 잣나무는 3.028±0.72 ㎎/g등을 나타내었다. 4. 供試樹種間의 濃度別 樹皮酸度는 亞黃酸가스濃度가 높아질수록 점차 減少하였는데 全體 平均酸度는 전나무가 pH 4.774±0.33으로 가장 높았으며, 주목은 pH 4.556±0.25, 잣나무는 pH 4.486±0.31의 結果를 나타내었다. 5. 供試樹種間의 濃度別 葉中水分含量은 亞黃酸가스의 濃度가 높아질수록 점차 減少하였는데 全體 平均 葉中水分含量은 주목이 62.74±2.1%로 가장 많았으며, 잣나무가 60.20±2.2%, 전나무가 57.70±2.5%의 結果를 나타내었다. This study was carried out to obtain information for the effect of sulfur dioxide on some seedlings as Taxus cuspidata, Pinus koraiensis, and Abies bolopbylla. Selected seedlings put in chamber(85×85㎝) were treated by sulfur dioxide at five levels(0, 0.5, 1, 2, 4ppm) for four hours. The results obtained from this research as follows: 1. Visible damages of sulfur dioxide were showed from margin of leaves, at high concentration(4 ppm) about 24 hours later and that orders were Pinus koraiensis, Abies bolophylla, and Taxus cuspidata. 2. It was appeared that the water soluble sulfur contents of among tree species increased with increasing concentration of sulfur dioxide and soluble sulfur contents of Abies bolophylla(0.0796±0.026%) were higher than those of Taxus cuspidata(0.0711±0.018%) and Pinus koraiensts(0.0704±0.019%). 3. Leaf chlorophyll contents of among tree species decreased with increasing concentration of sulfur dioxide. It showed that leaf chlorophyll contents were the heighest in Taxus cuspidata(4.704±1.33㎎/g) follow by Abies bolophylla(3.597±0.82㎎/g) and Pinus koraiensts(3.028±0.72㎎/g). 4. Bark acidity of among tree species decreased with increasing concentration of sulfur dioxide and bark acidity of Abies bolophylla(pH 4.774±0.33) were higher than those of Taxus cuspidata(pH 4.55±0.25) and Pinus koraiensif(pH 4.486±0.31). 5. Leaf water contents of among tree species decreased with increasing concentration of sulfur dioxide. It showed that leaf water contents was the highest in Taxus cuspidata(62.74±2.1%) follow by Pinus koraiensis(60.20±2.2%) and Abies bolophylla(57.70±2.5%).

안구의 비색소성 모양체 상피에서 발생한 유두상 선암종 -1예 보고-

최현주,최영진,이연수,이은정,강석진,김병기,심상인 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.12

酸性이슬에 의한 京釜高速道路邊 樹木의 被害에 關한 硏究

朱榮特,金英彩 경희대학교 부설 식량자원개발연구소 1991 硏究論文集 Vol.12 No.-

Studies were conducted to investigate the effects of acid dew and dust fall on the growth of Pinus rigida and Quercus dentata planted on the Seoul-Pusan Express Way. The acidity of dew increased as the distance from the Express Way was decreased. The length of 1-and 2-year-old twigs and the number of leaves of P. rigida were increased with increasing distance from the Express Way. Chlorophyll contents were gradually increased with the increase in the distance from the Express Way, especially in P. rigida.

잣나무림의 林冠構造 및 分光特性에 關한 硏究

朱榮特,金英彩,金洪律 경희대학교 부설 식량자원개발연구소 1996 硏究論文集 Vol.17 No.-

잣나무 인공림의 林冠構造의 분석과 분광특성, 엽록소 함량을 비교 조사하기 위하여 Standard Cosine Receptor(LI-COR-1800-11)와 Portable Spectroradiometer(LI-COR-1800-22), 比色計(UV-spectrophotometer)를 이용, 경기도 광주군 퇴촌면 소재 경희대학교 연습림에 시험조사구를 설치 측정 조사한 결과를 요약하면 다음 과 같다 1. 조사대상지의 林冠構造는 평균수고 11.03±0.10(m)에 대하여 平均 樹冠長은 6.69±0.67(m)로서 약 63.4%의 수관심도를 갖는 우수한 林冠溝造를 나타내었다. 2. 樹冠構造에 따른 光合成 效率을 알아보기 위한 分光特性에서 잣나무 잎의 연령별 光反射 係敎는 당년생 잎이 가장 높은 값(0.063~0.49)를 보였으며 대체로 엽령이 높아질수록 광반사계수는 낮아졌다. 3. 또한 엽령별로 측정된 光透過率에 있어서 透過係數는 당년생 잎이 가장 높은 값(0.003~0.139)을 보였으며, 1년생, 2년생, 3년생의 葉齡別 順으로 점차 잎의 노령화에 따른 감소경향을 보이고 있었다. 4. 이상의 光透過率과 反射率에 있어서 斜面 位置別로 채취한 잎에서 나타난 결과는 항상 태양광선을 많이 받는 임목의 상부에서 가장 높은 反射率(0.06~0.47)을 보였으며, 光透過率은 斜面 中部의 잎에서 그 값이 가장 높게(0.002~0.130) 나타났다. 5. 각 조사 대상목의 잎에 대한 전체적인 葉綠素의 含量은 1년생 잎에서 Chlorophyll a : 1.59㎎/g, Chlorophyll b : 0.54㎎/g 로 제일 높게 나타났으나, 葉綠素 構成比에 있어서는 Chlorophyll a/b : 3.51 로 당면생 잎이 가장 높은 측정치 를 보였는데, 연령이 낮을수록 이들 값은 감소하는 경향을 보였다. This study was carried out to examine the variation of chlorophyll contents and spectral properties in the needle of Pinus koraiensis. The sample needles were collected from Kyung Hee Univ. experimental forest located on kyunggi province by slope gradients with lower, middle and upper levels. Clorophyll contents and spectrum analysis was conducted on current year, 1 year old, 2 years old and 3 years old needles. The best condition of forest canopy structure of investigation area was approximately 63.4% of crown depth. This study also shows the following results on the photosynthesis effiency of crown structure : (1) The higest values of reflection coefficient was 0.063∼0.490 obtained from the needle of current year. (2) The highest tansmittance coefficient was 0.003∼0.139 from the needle of current year. (3) Reflexibillity at upper position of trees and the transmittance at the middle slope had the highest values(0.06-0.47 and 0.002∼0.130, respectively). (4) The chlorophyll content of the 1 year old needle had the highest values(chlorophyll a : 1.59㎎/g), but a rate of chlorophyll content of current year showed highest values(chlorophyll a/b : 3.51).

몇개 樹木의 葉形態에 따른 吸着粉塵의 量的 比較

朱榮特,金英彩 경희대학교 부설 식량자원개발연구소 1991 硏究論文集 Vol.12 No.-

The objective of this article was to study the relationship between tree morphological characteristics and amount of dust particle on leaves of 5 tree species Pinus koraiensis, Quercus mongolica, Paulownia coreana, Cercis chinensis, and Corylus heterophylla planted in 3 different districts. The total amounts of dust trapped were ranged from 0.084mg/cm^(2) to 0.390mg/cm^(2) and increased significantly as the distance from the road was decreased. The morphological characteristics associated with the dust trapping were found to be the leaf shape, secretion from leaves, leaf pubescence, and leaf vein density. Cercis chinensis showed the highest dust traping ability followed by C. heterophylla, P. koraiensis, Q. mongolica and P. coreana in that order.

(Zn, Cd)S:Cu 형광체의 발광(PL, CL) 현상에 관한 연구

신영진,尹昌周,金富吉 全北大學校 基礎科學硏究所 1979 基礎科學 Vol.2 No.1

Photoluminescent and cathodoluminescent (Zn, Cd)S phosphors are prepared by firing at 850℃ in N_2 gas of atmospheric pressure for an hour. They are doped with (1) an activator CuS, (2) an activator CuCl, (3) a flux NH_4Cl, (4) both an activator CuCl and the flux NH_4Cl, an (5) not doped with either one. The crystal structure of ZnS phosphors powder is the mixed phase of cubic and haxagonal, while the powders of (Zn, Cd)S : Cu (Zn, Cd)S : Cu, Cl and (Zn, Cd)S phosphors are the hexagonal pattern under the same firing condition. Photoluminescent and cathodoluminescent cells are made with these phorsphors and their emission spectra are measured at room temperature after these materials are excited with 3650 A˚ light and cathode rays. These spectra are shifted from blue (green) to red wavelength as the CdS content of the phosphors is increased, The NH_4Cl flux is found to help the doping of the impurity energy level and it has SA center in SA emisson. The following two results are also observed about (Zn, Cd) : Cu;(1) the values of lattice parameter a are varied linearly with the molar fraction of (Zn,Cd) (2) the impurity changes with quadratic curve when the molar fraction is varied.

앵커볼트 인발거동의 파괴역학적 해석

조영혁,김인순,변근주,송하원 연세대학교 산업기술연구소 1996 논문집 Vol.28 No.2

Anchor bolts embedded in concrete, used to transfer local loads into structures, are important structural details. The accurate predictions of the ultimate tensile capacity of the anchor bolts governed by the concrete cone failure are very important. The objectives of this study are to predict the fracture behavior of the concrete and to obtain the tensile capacity numerically for the pull-out of anchor bolts embedded in concrete. For this purpose, the methods to evaluate the ultimate tensile capacity of the anchor bolts embedded in concrete are summarized and the fracture behavior and cracking model of concrete are studied. From the concrete fracture analysis based on finite element modeling of the pull-out test, the fracture behavior of concrete including the ultimate tensile capacity of the anchor bolt is obtained. From the comparison between the numerical results and the experimental data, it is shown that the smeared modeling for the numerical predictions of the progressive fracture of concrete due to the pull-out of anchor bolts can be improved by using the line of interface elements along the crack path.

1996學年度 新入生 實態調査

鄭永壽,朴州信,元俊載 仁荷大學校 學生生活硏究所 1997 學生生活硏究 Vol.17 No.-

생산요소가격변화와 마크업의 변동 : 1970~1995

姜周勳,鄭郁泳,盧敬來 관동대학교 경영경제연구소 2001 경영논집 Vol.20 No.-

마크업의 결정요인은 가격과 비용의 두 가지 측면에서 고려해 볼 수 있다. 본 논문은 비용 측면에서 생산요소가격의 변화가 마크업 결정에 주요 요인임을 1970∼1995년 기간에 걸쳐 실증분석을 하였다. 대부분의 제조산업에서 마크업과 요소가격은 상호 -의 상관관계가 존재하는 것으로 실증 분석되었다. 특히 1980년대 후반부터 요소가격의 변화(실질임금 상승, 환율의 변화, 해외원자재 가격의 상승, 이자율의 변화)는 산업의 특성에 따라 전반적으로 산업별 마크업을 낮추는 결과를 가져왔다.