農家所得增大를 위한 土地利用改善에 關한 調査硏究 : -中間地帶를 中心으로-

金文植,朱奉圭 서울大學校 農科大學 1977 서울대농학연구지 Vol.2 No.2

A study on land utilization characteristics has been made chiefly on general description of farming scale, type of farming, land productivity and cropping patterns and so on. However, a study on land utilization related to family labor earnings and economic land rent has not been undertaken. From this point, attempt was made on comparative study between family labor earnings and economic land rent on land utilization. In short, the comparative research result between family labor earnings and economic land rent on land utilization can be summarized as follows. 1) A final goal on land utilization in semi-plain crop region depend upon family labor earning than economic land rent. This means that land utilization is related to subsistence rather than commercial type. 2) There are the differential economic returns by crops. This means that the differential economic returns by crops depend upon the adequate or non-adequate crop choice based on same soil fertility condition. Therefore, it is very important subject on crop choice. 3) As size of farm increase, economic land rent per tanbo is higher than family labor earnings per tanbo. This means that the larger size of farm was adopted in farm machinery. 4) In comparing with family labor earning and economic land rent between single cropping system and double cropping system. However, family labor earnings on double cropping system is higher than single cropping system. 5) It appears thar a larger proportion of semi-plain crop fields is allocated for food crop and single cropping systems, while a smaller proportion of semi-plain crop field is utilized for cash crop and double cropping system. To suggest the further research on land utilization characteristics technical coefficient should be studied and over-all allocation models related to land resource allocation should be developed near future.

에틸렌디아민 四酢酸과 4,4'-디아미노비페닐의 縮合重合

金鳳植 嶺南大學校附設 基礎科學硏究所 1985 基礎科學硏究 Vol.5 No.-

Poly(2, 6-piperazinedione) was obtained by condensation polymerization of ethylenediaminetetraacetic acid with 4,4'-diaminobiphenyl. The yields of polymers from polymerization were than 83% and the melting points of polymers were in the range of 250 to 280℃. The polymer obtained from equimolar ratio of monomers at higher temperature was more thermostable than that at lower.

Cr₂O₃와 ZrO₂ 세라믹 용사 코팅재의 마모 특성

김귀식,이봉길 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.1

This paper reports the wear characteristics of two types of coating materials, which are Cr_(2)0_(3) and Zr0_(2), coated plasma thermal spray method. The wear test was carried out under air, grease, and bearing fluid conditions. The wear testing machine of a pin-on disk type were used to measure friction coefficients and the weight losses of the coating specimens on the various sliding velocity and loading condition. The wear surface of specimens were observed by scanning electron microscope (SEM) photographs.

수용성 및 가식성 콩 단백질/�틴 블렌드 필름 제조 및 물성 연구

김성철,신용섭,정세환,유성구,박인식,김봉식,신부영 한국공업화학회 2003 응용화학 Vol.7 No.2

The manufacture of edible/biodegradable films or coatings can potentially add value to soy protein, Such films can find using as edible or nonedible food packaging materials. The effect of soy protein film-forming solutions on film formation, tensile properties of soy protein/pectin blend films were changed significantly by the amount of glycerol and the ratio of soy protein/pectin. Moreover mechanical properties of soy protein/pectin-montmorillonite clay have been studied. Tensile strength and modulus decreases as the relative humidity increased while with increasing relative humidity elongation at break increased.

동방결절의 부위별 전기적 특성에 관한 연구

김봉식,조성일,방효원,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1986 中央醫大誌 Vol.11 No.1

In order to investigate the regional eiectrophysiological characteristics of the rabbit SA node, the node was tied with fine silk threads into small preparations(0.5XO.5mm in size) and electrotonic connection between them was insulated. The preparations were divided into three groups, as peripheral, transitional and central areas. Three glass microelectrodes were inserted into the cells in each area and the data were collected when transmembrane potentials of each area was recorded simultaneously. 1. As the Na^+ concentration of the solution was reduced to 80, 60, and 40% of control, the beating frequency, the maximum diastolic potential(MDP), overshoot and the maximum upstroke velocity(Vmax) were decreased. The decrease of the beating frequency was more marked in the central area, and the spontaneous beating was arrested by the reduction of Na^+ concentration more than 60%. 2. In the peripheral area, MDP was decreased as the 2mM K^+ concentration reduced to 1 mM. At high K^+ concentration(12mM), the spontaneous beating of the central area was stopped in the 50% of preparations. 3. The decrease of the spontaenous beating frequency, due to Ach(Acetylcholine) was more prominent in the central area. The increase of the MDP was marked in the central area, however, the decrease of overshoot was distinct in the peripheral area. 4. The peripheral area was the most sensitive to TTX(Tetrodotoxin). The effects of epinephrine which changed the parameters of the action potential were more marked in the central area, but the effects were more marked in the peripheral area when the preparations were pre-treated with TTX. 5. The amplitude of the Na^+-K^+ pump activity of the peripheral area was larger and decreased in the transitional and the central area in sequence. The electrophysiological characteristics of the SA nodal cells have shown various differences by the locations. Especially, the central area which considered as the leading pacemaker are generally more sensitive to the various interventions.

물과 Micelle 용액에서 Benzaldehyde의 전기화학적 환원에 대한 연구

金日光,金潤根,金峯元,印權植 圓光大學校 基礎自然科學硏究所 1988 基礎科學硏究誌 Vol.7 No.3

The electrochemical reduction of benzaldehyde in 10% ethanol-water solution contained surfactants has been studied by direct current (DC) differential pulse (DP) polarography, cyclic voltammetry (CV) and controlled potential coulometry (CPC). A totally irreversible electrode reaction processes of benzaldehyde reduction proceeded by one electron transfer to form anion radical which undergoes both protonation and a second one electron reduction to give benzyl alcohol as a major product. The cathodic reduction wave was seperated by inhibition of sodium lauryl sulfate due to selectivity and effect of anionic charged micelle. The possible reduction mechanism with controlled pH range was suggested.

고랭지 성토지 감자-호맥 작부체계하의 토양개량이 감자 생육에 미치는 영향

허봉구,김춘식,김주현 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.4

고랭지에서 척박한 모재토를 성토한 포장에서 감자를 재배한 후 후작으로 호밀을 재배하는 작부체계 하에서 대조구, 화학성개량구, 제오라이트구 등 3개 처리를 두고 감자 파종 전 성장하고 있는 호밀을 경운, 매몰하여 감자를 1999년부터 2년간 재배하면서 몇 가지 토양개량 처리한 것을 조사 분석한 결과는 다음과 같다. 1. 성토재료용 모재토는 양질사토로서 유기물과 인산함량 등 이화학성이 매우 낮은 척박토이었다. 2. 감자의 지상부 생육은 대조구에 비하여 제오라이트구와 화학성개량구가 좋았으며 감자수량도 2.1~4.5% 증수되었다. 3. 감자 수확 후 토양이화학성은 시험 전에 비해 점차 증가하였으며 호맥재배로 토양 유기물과 인산함량 증가가 컸다. 4. 호맥은 감자 파종 1주일 전에 경운, 매몰하였으며 그 효과는 토양 중 유기물함량 0.5~3.5g/㎏정도 지력 증진효과가 있었다. This study was conducted to investigate the changes of crop growth and soil properties under potato-rye cropping system in highland mounding-soil. Experimental plots were designed with control, chemical improvement and zeolite+chemical improvement plot during 1999 to 2000year. Mounding-soil were low in the contents of soil chemical properties that organic matter contents etc., and that soil texture was loamy sand soil. The growth and yield of potato in the chemical improvement and zeolite plots were higher than that of control plot by 2.1~4.5%. After harvesting, the contents of soil chemical properties increased than those of experiment before. Increasing ratios of soil organic matter and phosphate contents were higher than other soil properties by rye cultivation. Rye residues were buried and tilled before potato planting at 1 week. Rye residues burying deep under the ground increased by 0.5~3.5g/㎏ to soil organic matter contents.

Urea 박테리아 전극에 관한 연구

인권식,최창진,김봉원,손무정,김인탁 圓光大學校 基礎自然科學硏究所 1987 基礎科學硏究誌 Vol.6 No.2

Proteus vulgaris 를 ammonia와 carbon dioxide gas-sensor에 고정시켜 감응도와 재현성이 우수한 요소에 대한 박테리아 전극을 직접 제조하여 pH, 온도, 완충용액, 박테리아의 양, 여러 가지 아미노산 및 무기염류에 대한 영향과 전극의 수명 등에 관하여 조사하였다. 먼저 ammonia-박테리아 전극은 25℃에서 pH 7.4인 0.05M phosphate 완충용액을 사용하였을 때가 최적이었으며, 7.0 ×10 exp (-4) -3.0 ×10 exp (-2)M 내에서 직선을 나타내었고, 이때 감응도는 116.7mV/decade였다. 한편, carbon dioxide-박테리아 전극은 30℃, pH7.0, 0.1M phosphate 완충용액에서 가장 우수한 감응을 보였다. 이 경우는 7.0 ×10 exp (-4) - 5.0 ×10 exp (-2)M 내에서 45.4 - 45.7mV/decade를 나타내었다. 이들 두 전극중에서 carbon deoxide-박테리아 전극을 이용하여 요소를 정량한다면 방해물질들의 방해가 최소화되었다. 실제 임상적 응용에서 분광 광도법과 비교한 결과 실험과정이 간단하고 편리하여 신속하게 많은 양의 시료분석이 가능하다. Bio-electrodes for urea have been constructed by immobilizing the Proteus vulgaris on ammonia and carbon dioxide gas-sensors. The bacteria containing urease convert each molecule of urea into two molecules of ammonia and one molecule of carbon dioxide gas. Ammonia-bacterial electrode based on ammonia gas-sensor has linearity in the range of 7.0 ×10 exp (-4) - 3.0 ×10 exp (-2)M urea in pH 7.4, 0.05M phosphate buffer solution at 25℃. While carbon dioxide-bacterial electrode based on carbon dioxide gas-sensor has linearity in the range of 7.0 ×10 exp (-4) - 5,0 ×10 exp (-2)M urea in pH 7.0, 0.1M phosphate buffer solution at 30℃. These electrodes were investigated for the effects of pH, temperature, buffer solutions, bacterial amounts and interferences, and life time. As the clinical applications, urea in urine was determined by these devices and was compared with spectrophotometric method. As the results, those methods were by far more simple and rapid than these method.

사후분해 시체에 대한 법의학적 접근

최영식,이상용,김유훈,조갑래,이봉우,양경무,정낙은,서중석,이한영,이원태,강현욱 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

Disposal of a homicide victim by dismemberment is rare, but individual cases are on record in most major medicolegal departments. Recognition of postmortem mutilation may be of importance in the interpretation of certain murders committed by sexual perverts and other mentally deranged individuals and sometimes performed for the sole reason of easier disposal of the body. Postmortem dismemberment is usually readily recognizable as such; The edges of the injuries are dry and lack evidence of bleeding. The joints may be disarticulated without fracture, or the use of an axe or saw may be evident from examination of bones. Parallel horizontal or oblique furrows in the bone surface are caused by skipping of the saw prior to establishing depth. Such patterns on the bone may assist in identifying the particular saw involved. So we report 25 dismembered corpses that autopsied in National Institute of Scientific Investigation. This paper can help in attempting to establish not only the first criminal investigation steps but also the medicolegal approach methods in unidentified and dismembered deaths.

솔잎혹파리에 의해 피해를 받은 松林에 關한 硏究

朴奉奎,金潤植 梨花女子大學校 韓國生活科學硏究院 1976 韓國生活科學硏究院 論叢 Vol.17 No.-

全南 務安郡의 松林이 솔잎혹파리에 依한 과거의 被害가 점차로 回復되어가는지 또는 그렇지 않은지에 관한 연구결과는 아직 밝혀지지 않은 상태이다. 그러나 현재 忠南의 서천군은 가장 피해가 심하고, 全北의 고창군은 그 피해가 中間정도이며, 全南 무안군은 그 피해가 회복되어 가는 것같이 外觀上으로는 나타나고 있다. 本調査는 赤松林과 黑松林을 對象으로 各地域마다 조사를 실시했다. 3개 조사지역의 정도는 삼림식생, 임상식생 및 환경구배의 類型에 뚜렷한 차이가 있어 다음 몇가지의 요인에 대한 정밀조사연구가 필요하다고 사료된다. 1) 個體占有面積과 密度 2) 落葉堆의 두께, 식피율, 토양水分含量, 토양 유기물함량, 상대습도 및 個體當의 總基底面積 3) 地理的인 方位, 참나무類의 占有度 및 出現頻度 The writer has investigated conditions of damage wrought by the needle midges, The codiplosis japonensis, upon the pine forests in Chun-nam and Choong-nam and Choong-nam Provinces, Korea. It os evident that degrees of the damage vary according to the following situations: 1) Individual occupied area and density of the forest. 2) Depth of litter, vegetational coverage, soil moisture, humus, and reltice humidity. 3) Total basal area per trees. 4) Geographical direction.