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요소엽면살포(尿素葉面撒布)에 따른 수도(水稻)의 질소영양에 관한 연구
조성진 한국농화학회 1968 Applied Biological Chemistry (Appl Biol Chem) Vol.9 No.1
This experiment was carried out as a part of the studies on reasonable application of nitrogen in rice plant to determine: (Ⅰ) Nitrogen absorption. and rooting of rice seedlings as affected by urea foliar application at late seedling stage (Ⅱ) Effect of leaf prunning and foliar application of urea at late heading stage on the maturation and yield of rice (Ⅲ) Effect of foliar application of urea and its time during the stage of ear formation on yield of rice plant. Results obtained are summarized as follows. Exp.I: Nitrogen absorption and rooting of rice seedlings as affected be urea foliar application at late seedling stage. 1 : The foliar application of urea plots(T₁,T₂) snowed mare N-content than non-urea foliar application plot(T0) at lane seedling stage, being significant among treatments and foliar application of urea seemed more effective in increasing the N-content of seedlings. and promoted root settlement and early growth alter the transplanting. 2 : The carbon contents of the plants of T₁, and T₂ at late seedling stage increased than T_0, and the carbon contents. of T₁ and T₂ plots became higher in amount in proportion to the nitrogen absorption as compared with those of T0. 3 : C/N ratio appeared significant among soil application plots(N₁, N₂) and foliar application of urea plots (T₁, T₂ and T_0). C/N ratio was lower in case of increased amount of nitrogen. The higher contents of nitrogen and carbon and lower C/N ratio resulted in the increment of root numbers and root lengths. Exp.II: Effect of leaf prunning and foliar application of urea at late heading stage on the maturation and yield of rice. 1 : There was a highly significant decrease in the maturing rate by severe leaf prunning. In the mean time, significant increase in maturing rate was observed with urea foliar application and it was found the more frequent application the more effective for higher maturing rate with a moderate significance. A correlationship between the level of prunning and maturing rate was enumerated to 0.961 of correlation coefficient, which indicated an increased maturing rate by the increased number of remaining leaves. 2 : The 1.000 grain weight, grain weight and hulled rice yield increased by leaf prunning in order (plot a$lt;b$lt;c$lt;d$lt;e) at the plots where upper single(a), two(b), three(c), four(d) and five leaves(e) remained, respectively, as compared with control plot(f), thus the high significance were observed among the leaf prunning. Correlation coefficient(r) of 0.925, 0.971 and 0.989, respectively, showed highly significant corrlationship between the level of leaf prunning. In the mean time, the 1000 grain weight, gram weight and hulled rice yield increased in oder at one time urea foliar application plot(B) and two times foliar application plot (A) as compared with the .yield of control plot (C), and the high significance were observed among those treatments. Hulling ratio also showed the same tendency among those treatments(C,B and A plots in order). 3 : The nitrogen and carbon contents of both panicles and leaves in the foliar application of urea were increased. C/N ratio showed a higher level only in the leaves at the urea spray plot. In the mean time, it was found a higher degree of correlationship between the hulled rice yield(0.937),the contents of nitrogen(0.952) and carbon(0.946), and C/N ratio, indicating that the higher the contents of nitrogen and carbon, and C/N ratio the higher the yield of hulled rice. Exp. III: Effect of foliar application of urea and its time during the stage of ear formation on yield of rice plant. 1 : The difference in average number of grains per ear was significant between the time of ear fertilization, showing a tendency of increase of grain number in accordance with earlier treatments although no significance was seen between methods of ear fertilization. Number of grain of 2.0% urea solution foliar application plot, 10% urea solution soil application plot, 2.0% urea solution soil application plot and the control are 65.9, 65.6, 64.4 and 63.9 grains, respectively, indicating the largest grain number in the 2.0% urea foliar application plot among the others. 2 : Maturing rates showed a significance between time of ear fertilization, showing a tendency of increase in the rate with the time lagging until 7 days before Baring. Those of A₁, A₃, A₂ and A_0 were 89.8%. 89,4% 87.8% and 87.5% respectively, showing the highest of rate in A₁ and A₃ in methods of ear fertilization and being highly significant between its treatment. 3 : 1000 grain weights were highly significant between time of application, showing a tendency of increase of weights with the time lagging until days before earings as that of maturing rates. High significance was recognized between methods of ear fertilization, showing the highest in A₂ 23.18 gr. 4 : Yields per 3.3㎡ were not significant between time of ear fertilization, whereas were highly significant between methods of ear fertilization. Those of A₁, A₃, A₂ and A_0 were 1.486 ㎏, 1.491 ㎏, 1.381 ㎏ and 1.328 ㎏, respectively, showing the highest in A₁ and A₃. 5 : Hulling ratios showed significant different between time of ear fertilization, showing the highest in T₂, whereas those of methods of ear fertilization were highly significant between its treatment, Those of A₁, A₃, A₂ and A_0 were 84.72%, 84.06%, 83.29%, and 82.56% respectively, showing the highest m A₂ and A₃ among others. 6 : Yields of hulled rice per 3.3 ㎡ showed significant different between time of ear fertilization, showing the highest in T₁, 1.192 ㎏. Whereas, those were highly significant between methods of ear fertilization. Those of A₁, A₃, A₂ and A_0 were 1.259 ㎏, 1.254 ㎏, 1.149 ㎏ and 1.095 ㎏, respectively, showing the highest in A₁ and A₂. 7 : Contents of nitrogen on rice plant increased in case of nitrogen application as ear fertilizer and showed that the case of urea foliar application was more effective than that of soil application, showing the increased nitrogen content of rice plant was accompanied by carbon content.
양이온의 층간 반응에 의한 텅스텐 산화막과 전해질 계면에서의 전기화학적 특성에 관한 수치해석
孫太源,趙成鎭 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2
In this study, optical density for tungsten oxide film is investigated by equation of diffusion derived for cation diffusion into film. Current is calculated for one case; reversible case that reaction rate is very fast. Dimensionless parameter ξ, ratio of diffusion coefficient in electrolyte and inside of film, and ζ, include exchange current density, are defined. Optical density is calculated with distribution of cation concentration that is calculated for dimensionless parameters in film. In reversible case, concentration of interfacial of electrolyte and film is very high and it takes long time to distribute uniformly. Change of optical density is great for change of diffusion coefficient.
趙成鎭,卞珠燮,陸昌洙 충북대학교 엽연초연구소 1974 煙草硏究 Vol.2 No.-
With the aim of surveying soil characteristics of main Y.S.A-producing fields, the results obtained from the soils in the Cheungju-Cheungwon-gun producers' cooperative area are summarized as follows : 1.The results obtained from the present survey of soils were not consistent with the originalgrades designated as A, B and C by the producers' cooperative. 2.Particularly in terms of the relationship between cultivation periods(yrs) and yields, the yields in normal-productive soils decreased gradually with time, whereas no such tendency was observed in the low-productive soils. Pest damages were noticeable in the case of the low-productive fields. 3.Physical properties showed that the depths of surface soils were, on average, over 20cm in both normal and low-productive fields, the former being a little deeper. In soil texture, in general most of them were coarse sandy soils, low-productive fields abounding in clayey soils. 4.Chemical properties indicated that both normal and low-productive soils were strongly acidic, Mostly the latter having lower pH's than the former to be pH 4.6~5.0. Proportionally, exchangeable base and degree of base saturation of low-productive soils were lower than those of normal soils. This seems to be the cause of low-productivity in terms of soil itself. Contents of total nitrogen, available phosphorus, and humus were very low and far below the average contents of field soils of this country. No difference was recognized between normal and low-productive soils.
불소가 유산균의 증식과 포도당 대사에 미치는 영향에 관한 생체외 연구
조성진 大韓小兒齒科學會 1990 大韓小兒齒科學會誌 Vol.17 No.2
Yakult lactobacilli were selected for the study because of their high growth speed in caries activity test medium. The complete inhibition level of fluoride was 160-330 ppm in solid medium, 1500-2000 ppm for growth in liquid medium, and 2500-3000 ppm for glucose metabolism in liquid medium. The inhibition rate of 50 ppmF in solid medium was about 80%, and that of 500 ppmF in liquid medium was about 40% for growth and about 60% for glucose metabolism. In liquid medium, the number of bacteria was reduced when F concentration was above 2000 ppm and the pH of medium rised when F concentration was above 3000 ppm. Constituents and pH of the medium, culturing conditions, the type of fluoride salt, strains of bacteria, tolerance development, and ecologic relationship with other bacteria should be considered in interpretation of results and in next studies.
범죄피해와 지역무질서의 자영업자 범죄두려움 영향 분석 - 경찰신뢰 조절효과를 중심으로 -
조성진,박상진 한국범죄심리학회 2022 한국범죄심리연구 Vol.18 No.3
범죄두려움의 주요 영향요인을 찾기 위한 연구와 논의는 꾸준히 수행되고 있다. 하지만 자영업자를 대상으로 한 연구는 찾아보기 어렵다. 자영업자를 특정하여 범죄피해를 집계하지 않고, 피해조사가 활발히 이뤄지지 않았기 때문이다. 하지만, 자영업자의 범죄피해 심각성은 매우 높은 상황임으로 이에 대한 학문적 연구가 필요하다. 이 연구는 자영업자 범죄두려움에 미치는 영향 요인을 범죄피해모델과 지역무질서모델, 경찰신뢰모델을 적용하여 살펴보았다. 연구 데이터는 한국형사정책연구원이 실시한 「전국 사업체 안전실태조사」 자료를 일부 활용하였다. 전체 표본 8,140개 가운데 사업주 5,080개를 추출하여 분석한 결과, 지역무질서와 범죄피해경험은 자영업자 범죄두려움을 통계적으로 유의하게 증가시키는 것으로 나타났다. 특히 자영업자 범죄두려움에 대한 지역무질서의 영향정도가 범죄피해경험보다 더 컸다. 경찰신뢰는 지역무질서와 자영업자 범죄두려움 간 관계 수준을 유의하게 조절하였다. 특히 경찰신뢰가 높은 집단이 지역무질서 정도가 커질 때 범죄두려움이 가중되는 것으로 나타났다. 이러한 결과를 바탕으로 연구의 한계와 자영업자 범죄두려움을 줄일 수 있는 정책적 시사점을 제안하였다.
조성진,이광희 원광대학교 치의학연구소 1990 圓光齒醫學 Vol.1 No.1
Four kinds of barley beverages and two kinds of colas were studied for their relative cariogenicity. Enamel specimens were made from four first bicuspids of one teenager. They were immersed in the beverages for two hours at 37℃, and then enamel microhardness was tested by microhardness tester. Barley beverages showed lower demineralizing potential than colas. Synthetic hydroxyapatite was demineralized by same method, and dissolved calcium concentration was measured by ion analyzer with calcium electrode using direct calibration. There was no significant difference between two beverages. Demineralized hydroxyapatite was analyzed by X-ray diffractometer, and there was also no significant difference in half width of peaks between two beverages. Spearman's rank correlation coefficient was 0.986(p<0.01) between calcium dissolution and X-ray diffractogram data in six beverages.