남조류의 체외 대사부산물이 다른 조류의 광합성에 미치는 타감작용

김범철,허우명,황길순,안태석,심재형 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

The effect of cyanobacterial extracellular byproducts upon the aIgal photosynthesis was assessed to elucidate the allelopathic effect of algal blooms in eutrophic lake. Algal cultures were filtered with 0.2μm membrane filters to remove algal cells and sterilized. 0 to 30m1aliquots of filtrate were added to 25m1 culture suspensions of other algal species, and the (14)^C uptake rates wert measured. The filtrates of cyanobacterial cultures(Anabaena flos-aquae, Phormidium sp.) inhibited the photosynthesis of green algae(Selenastrum capricornutum and Scenedesmus brasiliensis), while the filtrate of Selenastrum capricornutum and Scenedesmuns brasiliensis did not inhibit Anabaena flos-aqiae. In the autoinhibition test Anabaena flos-aquae, Selenastrum capricornutum, and Scenedesmus brasiliensis showed positive, negative, and no effects, respectively.

미국 금융정책변경이 한국경제에 미치는 영향

成範鎔,金汶姬 홍익대학교 경영연구소 2001 경영연구 Vol.26 No.-

한강수계 인공호의 부영양화에 관한 비교 연구

김범철,안태석,조규송 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

Trophic states were surveyed in reservoirs of the Han River. Trophic states were assessed from chlorophyll a concentration, Secchi sisc transparency, total phosphorus andprimary productivity in recent several years. Trophic state indices(TSI)sere calculated from the summer-time average of water quality data. TSIs were in the rage of mesotrophy to eutrophy, from 40 to 55. The highest TSI of all the frservoirs of the Han River was observed at the inlet of the south Han River in Lake Paldang. TSI varied with year because of such event as turbid flood inflow, water bloom, and descending water level. The correlation ceofficients between the six TSIs were high, but the probabilities of paired T-test were very low, which means significant differences in the absolute dimensions of the TSIs. The correlation between TSI (SD) and TSI (TP) was highest and TSI(Chl) showed lower correlation with TSI(SD) and TSI(TP)

소결된 기어부품의 플라즈마 질화처리에 관한 연구

김범석,이상율,김광석 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-

본 실험에서는 Fe합금으로 소결된 기어부품을 특성향상을 위해 여러 조건에서 플라즈마 질화 처리를 실시하여 특성을 평가하였다. 특성평가는 광학현미경, XRD, 비커스경도계, 표면조도계를 이용하여 실시하였다. 특성평가 결과 질소의 분율이 높아질수록 화합물층의 두께는 증가하였고 질화처리 온도가 증가할수록 표면의 경도도 약 Hv150에서 Hv300, Hv400 으로 증가하였고 표면의 조도(Ra)값도 0.33㎛에서 0.57㎛로 증가하였다. XRD 측정결과 모든 조건에서 Fe4N상이 나타나는 것을 볼 수 있었고 처리온도가 올라갈수록 Fe4N상이 성장하는 것을 볼 수 있었다. Sintered Fe-alloy gear parts were plasma nitrided, and the influence of nitriding treatment condition(temperature, gas mixture, duty ratio)on the surface layer microstructure, compound layers properties of the gear part has been studied. Properties of the nitrided layer were analysed by using optical microscope, X-ray diffractometer(XRD), micro-vickers hardness tester, roughness tester. It was found that compound layer thickness increased with increasing ratio of N2 gas mixture and surface hardness, roughness increased with increasing nitriding temperature.

소양호의 DOC와 POC의 분포

김범철,최광순,김철구,이유희,김동섭,박제철 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

Seasonal and vertical distributions of dissolved and particulate organic carbon were investigated from May 1995 to March 1997 in n deep mesotrophic reservoir, Lake Soyang, POC contentrations at the dam site ranged from 0.1 to 1.8 mgC/L and DOC concentrations ranged from 1.4 to 4.9 mgC/L. POC concentrations in the surface layer were higher in the season of cyanobacterial bloom, July to September. High POC was observed at the depth of 30 to 60m after storm runoff in summer monsoon season. Turbid storm runoff formed intermediate current laden with much particulate materials from terrestrial sources. The vertical and seasonal variation of DOC was smaller than POC. Higher DOC was observed near the lake bottom which implies sedimentation and degradation of much organic detritus at the bottom. The ratio of DOC : POC varied from 2 to 60, and the ratio was lowest in September 1995 when algal density was highest. DOC : POC ratio of the main inflowing river, the Soyang River, varied from 1 to 10, and the ratio was low in storm runoff when the POC concentration was high.

The Hypolimnetic Anexie zone and the Metalimnetic Oxygen Minimum Layer in a Deep Reservoir, Lake Soyang

김범철,조규송 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

소양호의 용존산소 수직분포를 1985년 7월부터 1989년 7월까지 1∼2개월 간격으로 조사하였다. 전반적으로 용존산소농도가 매년 감소하는 추세를 보이고 있으며, 특히 1988년에는 심층에 무산소층이 형성되어 순환기 직전에는 저층으로부터 15m 높이까지 확대되었다. 이는 1980년대초까지 빈영양호이었던 소양호가 부영양화되고 있음을 보여주는 것이며 무산소층에서는 저층으로부터 용출된 무기인산염과 암모니아의 농도가 매우 높아 앞으로 영양염용출 증가에 의해 소양호의 부영양화는 가속될 것으로 예상된다. 또한 최근 수년간 겨울기온이 높았던 것도 수직혼합을 감소시킴으로써 용존산소 감소에 기여했을 것으로 보인다. 매년여름 수심 10∼20m에서 중층 산소최저층이 나타나고 있는데 이것은 국내 대형 저수지에서의 전형적인 분포형태인 것으로 보인다. 산소최저층이 표층의 혼합층 바로 아래에 형성되고, 수심이 깊어지면서 다시 서서히 산소가 증가하는 것으로 볼때 형성원인은 표층의 수온이 높아 산소비율이 크고 표층의 혼합층까지만 산소가 공급되기 때문인 것으로 보인다. 또한 장마철에 중층으로 유입되는 유입수에 현탁물이 많이 포함되어 있으며 산소최저층은 새로이 형성되는 중간츠으이 상부와 수심이 일치하고 있고 항상 여름의 우기에 형성되는 것으로 보아 우기의 유입수와 관련이 있을 수도 있다. The seasonal and vertical dissolved oxygen distributions were surveyed from July 1985 to July 1989 in a warm monomictic dendritic-shape reservoir, Lake Soyang. DO content showed the general trend of decrease from year to year, implying the advance of eutro· phication. HypoUmnetic anoxic zone began to develop in 1988 reaching upto 15 m from the bottom, which is an epoch·making event in Lake Soyang, well-known as a clear oligotrophich lake until early 1980s. In anoxic zone phosphate and ammonia concentration were very high, and nitrate depleted, which is expected to accelerate eutrophication of Lake Soyang. Insufficient cooling of surface waters in warm winters of 1986 to 1988 seems to have enhanced the DO decrease by reducing the duration of turnover. Metalimnetic 00 minimum layer appearing every late summer at the depth 15∼20m is a remarkable feature of DO distribution which is thought to be the typical pattern in large Korean reservoirs. The mechanism of the formation of metalimnetic oxygen minimum is further to be studied. However, it seems to be caused by the higher rate of oxygen consumption in epilimnion due to high temperature and the oxygen supply limited to only surface mixed layer, since it is formed just below the mixed layer and dissolved oxygen increase gradually in deeper layer. The intermediate current of storm runoff laden with organic debris of terrestrial origin might be the alternative cause.

히스타민 및 항히스타민제가 L_(1210)백혈병세포계증식에 미치는 영향에 관한 실험적 연구

염범우,이대일,백승룡 고려대학교 의과대학 1986 고려대 의대 잡지 Vol.23 No.1

There is close relationship between growth of tumor cell and immunologic function of the host. And growth of tumor cell also partially depends on histamine which indirectly modulate degree of immunologic response of the host. However, there is no report on direct effect of histamine on the growth of tumor cell. Therefore, to evaluate direct effect of histamine on growth of tumor cell, histamine and Hz-receptor antagonist (cimetidine) were added in Fischer's culture media in concentration of 10^(-3)M , 10^(-4)M and 10^(-5)M and cultured L1:10 leukemic cell for 24,72 and 96 hours. The results are as followings; 1. Histamine iii high concentration(10^(-3)M) inhibited the proliferation of L_(1210) cell lines. 2. H2-receptor antagonist showed no inhibitory activity on the proliferation of L_(1210) leukemic cell lines a t each concentration and (10^(-3), 10^(-4) and 10^(-5)). 3. The combination of histamine and H2-receptor antagonist showed temporary inhibitory effect on the L(1210) leukemic cell lines at 24 hours culture. Above results suggest that histamine show inhibitory activity to growth of L_(1210) leukemic cell lines through H2-receptor.

協議離婚에 關한 小考

鄭範錫 건국대학교 1975 樂圓誌 Vol.10 No.1

이혼은 부부의 생존 중에 당사자의 의사에 의하여 손인을 해소하는 것을 말한다. 생각컨대 혼인은 남녀의 종생적 결합을 목적으로 하는 것이므로 인위적으로 이것을 해소한다는 것은 본래의 의도에 어긋나는 것이다. 종교적, 도덕적인 면만이 아니고 일반사회적인 면으로도 바람직한 것은 아니다. 그렇다고 도저히 계속될 수 없는 혼인관계를 법률상 강제로 유지하여 당사자를 구속해 보아도 오히려 더 잔혹할 경우가 있다. 그리하여 근대각국에서는 이혼제도를 인정하게 되었다. 역사적으로 볼 때 이혼은 금지주의에서 제한주의로 제한주의에서 자유주의로 발전하여 오고 있다고 할 수 있다. 우리 현행민법에는 협의이혼과 재판이혼의 두 가지 이혼제도를 받아들이고 있다. 우리나라의 이혼은 95%를 상하하여 협의이혼에 의하고 있음을 고려할 때, 이혼제도가 본래의 입법취지와 같이 올바르게 공평하게 운영되고 있느냐의 여부는 협의이혼의 성과에 크게 매였다고 할 수 있다. 그런데, 실제에 있어서는 부혼의 실력에 차가 크기 때문에 협의이혼을 악 이용하여 부가 처를 축출 이혼하는 경우가 많음을 알 수 있다. 그러므로 법개정을 하든지 법운영에 특별한 입법을 강구하여 이러한 이혼제도의 악이용을 막아야한다. 그러나 우리는 강자의 축출이혼을 막아야 할 뿐만 아니라 약자의 이혼제도 악이용도 동시에 막아야 한다. 이혼제도는 결코 부만 위하거나 처만 위하는 것이 아니기 때문이다. 본에서는 협의이혼을 함에 있어서 당사자 일방이 무제한하고 자유로이 이혼의사를 철회할 수 있느냐의 여부를 검토하여 잘못이 있을 때 그 대안을 제시하여 이혼제도의 올바른 운명을 기하고자한다.

韓國의 工業化와 農地制度

鄭範錫,金炳台 건국대학교 1974 學術誌 Vol.17 No.1

1 The history of human life is the process of pursing the condition of better life, under which technology has improved and social institution changed. Any social institution which is not adaptable to, or detrimental to, technological improvement is bound to be reformed or discarded. Good eoamples can be seen in land reforms which several countries carried out in the wake of World war II. The primary cause of the Land Reform in Korea was to get rid of the feudal factors which had checked agricultural development. It was undertaken to keep step with improving industrial society, to make the most effective use of natural resources, to promote the public welfare and help contribute to the welfare of the people. Since the Reform introduced about 20 years age. the industry has developed to a higher level, while agriculture has made slow progress. As a result, the gap between agriculture and industry has grown evenmore, which is now an obstacle to the industrial development. Therefore, the peasant's land-owner-ship system breeded from the Land reform has shown its limit to the agricultural development. 2 In Korea, the land Reform in 1950 eliminated a parasitic large-landowner ship-system. As a result, a total of 767,320 hectares of farm land was the tenant farmers were put in place of the landed through the compensatory purchase and distribution, that is, because of the distribution of 567,320 ha farm lands to 1,646,180 houses did the tenant farmers disappear. Not long after the farm lands were distributed, however, the heavy burden of repayment, the continued low grain price policy, and the resulting penury of farmers which was the Land Reform and, moreover, even mire aggravated during the Korean War in 1950 forced them to resell the dstributed lands to become another tenant farmers. The farmers who thus again turned landless now account for about 26.5% of the total farmers, while about 20% of the total farm land area, or 460,000 hectares, are put under tenant system, though it may not be defined as "feudalistic." Moreover, once they became free from the tenant system, they also became free from any protection as well. Thus, they got poorer than before the Land Reform, and the fertility of soil decreased even more. The average size of farm household dicreased to 0.92ha compared with 1.08 at the end of 1945. The new land ownership system, thus, became an important factor deterrent to both the growth of productivity and the improvement of technology in the agricultural fetor, resulting in a wider gap between the industrial and agricultural fetors. 3 All of these considerations stress the urgent need to introduce a new reform with regard to the landownership system. Basically, such a reform should be related to the reassesment of the principle of self-supporting, independent farmers. More urgent problem, however, is to check the resurrection of tenant farmers, by means of introducing new laws. And pending such a legislation, some counter-measures must be made to protect the deprived farmers. And the judicial bodies are required to produce new cases. Such cases might be to recognize the vested rights of the farmers over the land they cultivate on lease. Though the depriviation of poor farmers are basically due to the shortfalls of the Law, such judicial decisions might be of much help in improving the present situation until a new law is enacted. Eventually, however, the marginal tams should be consolidated in to cooperative farms in order to do away with their penury and to male them better adapt to the industrial development. In short, the new land reform law should include the following; (1) A cooperative, or a farmers, corporation(which is to be operated by the farmers themselves) shall be entitled to the farm management, (at present, a cooperative, prohibited from engaging in management, there is no law permitting a farmers corporation.) (2) Such a corporation shall be allowed to have its own farm-land and at the same time be exempted from the present limitation to the size of farmland. (3) The individual farm lands in vested in the corporation shall not be transferee to others without the consent of the corporate body, who will be given the priority in purchasing them. (4) The State shall finance the farming of such a corporation, as well as its purchasing of farmlands. (5) The Corperation may not refuse the buying of the farm land should any individual farmer so request. (6) If a member of the cooperation ,rants to quit the membership and to restore his own land instead of receiving the price for it, the corporation shall return has such land to him if its management is not seriously interrupted by that; but if it is, the corporation shall purchase a similar land and return it to him. (7) The lands invested in the Cooperation shall be capitalized; the rent shall act as dividends the members of the corporation be guaranteed to be paid a 20% share dividend of an average out put; it being fixed permanrtly. (8) The Cooperation shall have the right to mortage the lands of its members. (9) The allotment in profit shall be shared in such order as; the first, the rent of land; the second, capital; and the third, labour. (10) All kinds of the tenancy shall be prohibited, and the today's landlords and tenant farmers, be welcomed to join the Cooperative management. (11) A Farm Land Committee shall be reorganized and strengthened; the landlords shall be prohibited from selling off their lands, while those who are not farmers from obtaining the lands. Finally, there is one thing we must be careful. The Cooperation mustbe promoted, but not enforced, by the Government; it must be a voluntary body of farmers.

常虛先生의 片貌

鄭範錫 건국대학교 1976 學術誌 Vol.20 No.1