국내산 어류의 사료가치에 관한 시험

이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4

To serve as a basic information in using domestic fish meals instead of imported one in chick ration, two feeding trials were carried out with broilers for eight weeks each. 1. The content of crude protein and essential and non-essential amino acids except valine in the foreign fish meal was superior to that of ten kinds of domestic fishes.(Harengula zunasi, Chasmichthys gulosus, Clupanodon punctatus, Arctoscopus japonicus, lagre anchovy, medium anchovy, small anchovy, anchovy heads, fish heads and mixed fishes). 2. No statistical differences were noted among 5 domestic fishes (Harengula zunasi, Chasmichthys gulosus, medium anchovy, small anchovy and mixed fishes), 7 domestic fish meals (Arctoscopus japonicus, Harengula zunasi, Engraulis japonica, Ammodytes personatus, Trichiurus haumela, Monacanthus cirrhifer and small Alaska pollack.) and imported fish meal in weight gain, feed consumption and feed efficiency. It was thus concluded that all of the domestic fishes and fish meals used in these experiments were just as effective as the imported one when used to supply comparable amounts of protein in broiler rations.

Formation of Poly(vinylidene difluoride) Membranes with Various Pore Sizes by a Phase Inversion Process and Membrane Performance of Aqueous and Non-aqueous Solution System

이규호,김인철,Lee Kew-Ho,Kim In-Chul The Membrane Society of Korea 2005 멤브레인 Vol.15 No.1

비대칭 폴리비닐리덴플루오라이드(PVDF) 막을 상전환법으로 제조하였다. 도포용액은 PVDF를 용매인 N-ethyl-2-pyrrolidone (NMP)와 비용매인 1,4-dioxane, diethyleneglycol dimethyl ether (DGDE), acetone, (equation omitted)-butyrolactone(GBL)의 혼합용매에 녹여서 제조한다. 여러 첨가제가 도포용액 특성, 투과특성과 막 구조에 미치는 영향을 조사하였다. 응고제인 물과 1,4-dioxane, DGDE, acetone과의 상용성이 NMP보다 낮아서 기공크기가 작아진다. 첨가제의 양을 조절하여 기공크기를 변화시켰다. 혼합용매(수계 및 비수계)가 막의 투과성능에 미치는 영향을 살펴보았다. 용액점도뿐만 아니라 표면장력도 용매 투과특성에 영향을 끼침을 알 수 있었다. Asymmetric PVDF membranes were prepared by the phase inversion from casting solutions containing PVDF, NMP as solvent and 1,4-dioxane, DGDE, acetone, or GBL as additives by immersing them in water. The effects of various additives on the casting solution properties, permeation properties, and membrane structures were investigated. Low miscibility of 1,4-dioxane, DGDE and acetone with the coagulant (water) compared with NMP resulted in reducing the membrane pore size. When DGDE is used as an additive, the pore size was reduced because of its incipient sharp interface formation in the water. GBL increased membrane pore size because of its polarity compared to that of NMP. The PVDF membranes with various pore sizes could be obtained by controlling the amount of additive. The effect of mixed solvent (aqueous and non-aqueous solution) on permeation through membrane was investigated. Not only solution viscosity but surface tension affected solvent permeation.

육성기 사료의 양적 제한급여가 육용종계의 발육 및 산란성에 미치는 영향

이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4

The effect of feed restriction during the rearing period on sexual maturity, performance in the laying house and economy was studied using 305 birds of broiler breeder pullet. During the rearing period(7∼24 weeks of age) feed was offered 80%, 75%, 70%, and 65% of feed consumption of full fed group. From 25 weeks of age all groups were fed ad libitum The results obtained are summarized as follows: 1. Body weight of 65% restricted group at 24 weeks of age was 73% of that of ad libitum group. At 45 weeks of age it was 85% of that of full fed group and not yet recovered completely. 2. Feed consumption of restricted groups from 25 to 50 weeks of age was somewhat more that of control group. However, there was no significant difference. 3. The degree of sexual maturity examined by weight of reproductive organ, length of fallopian tube and weight of comb and wattle at 21 weeks of age was extremely delayed with groups of feed restriction. The skeleton, however, almost equally developed between ad libitum and restricted groups. 4. The first egg production (days to 50% egg production) was delayed 1∼2 weeks with the restricted feeding. 5. Hen-day egg production was improved as the degree of restriction became intensive and 65% restricted group had the best result. The production of egg over 53g(hatchable egg) showed the same tendency. 6. Egg size was not affected by treatment. 7. Feed cost required for lkg egg production was the highest with the ad libitunz group and was decreased as the degree of feed restriction increased. The same tendency was obtained for the feed cost for 1 hatchable egg (over53g) Summarizing all of the da-ta, it was suggested that in broiler breeder the feed restriction should be below 65% of ad libitum group during the rearing period(7∼24 weeks of age), and the body weight at 24 weeks of age should be kept at the level of less than 70% of the control in order to get better performance during the laying period.

Preparation of poly(vinyl alcohol)-coated Composite Nanofiltration Membranes on Various Support Membranes

이규호,김인철,Lee Kew-Ho,Kim In-Chul The Membrane Society of Korea 2005 멤브레인 Vol.15 No.1

Poly(vinyl alcohol) (PVA)이 폴리술폰 한외여과 막, 술폰화된 폴리에테르술폰, 폴리아미드 나노 막 위에 코팅된 나노 복합막을 가압법에 의해서 제조되었다. PVA는 글루터알데하이드 수용액으로 가교되었다. 모든 지지층위에 PVA 희박용액이 성공적으로 코팅되어 나노복합막이 제조되었다. 지지막 위의 친수화도가 높아짐에 따라 수투과 유량이 증가하였다. 특히 음하전을 띠는 폴리아미드 나노 복합막의 제타전위는 PVA로 코팅함으로서 감소되었다. 막 오염 실험은 양이온을 띠는 계면활성제, 휴민산, 휴민산과 칼슘이온 복합체 및 bovine serum albumin을 사용하여 실행하였다. PVA로 코팅되지 않은 폴리아미드 나노복합막은 각각의 오염물질에 의해서 심하게 오염되었다. 휴민산과 단백질에 의한 오염은 오염물질의 등전점에서 가장 심하게 발생하였다. 휴민산에 이가 양이온을 첨가함으로서 오염이 심각하게 일어났다. PVA 수용액으로 폴리아미드 나노 복합막을 코팅함으로서 막 오염이 감소되었다. PVA로 코팅된 폴리아미드 나노 복합막은 산, 염기용액에 대해 저항성을 보였다. The poly(vinyl alcohol) (PVA)-based thin film composite nanofiltration (NF) membranes were prepared by coating polysulfone ultrafiltration membranes, sulfonated polyethersulfone and polyamide NF membranes with aqueous PVA solution by a pressurizing method. The PVA was cross-linked with aqueous glutaraldehyde solution. The NF membranes coated with a very low concentration of PVA on all the support membranes was successfully prepared. With increasing the hydrophilicity of the support membranes, the water flux increased. Especially, ζ-potential of negatively charged polyamide NF membrane was reduced by coating the membrane with PVA. A fouling experiment was carried out with positively charged surfactant, humic acid, complex of humic acid and calcium ion and bovine serum albumin. A non-coated polyamide NF membrane was significantly fouled by various foulants. The fouling process when using humic acid and protein occurred at the isoelectric point. There was severe fouling when using humic acid and adding bivalent cations. By coating the polyamide NF membrane with aqueous PVA solution, fouling was reduced. The polyamide NF membrane coated with PVA was resistant to the acidic and basic solution.

GZO 타겟 결정성에 따른 박막의 전기적 광학적 특성

이규호,김경환,Lee, Kyu-Ho,Kim, Kyung-Hwan 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.2

In this research, we prepared Ga doped zinc oxide(ZnO:Ga, GZO) targets each difference sintering temperature $700^{\circ}C$, $800^{\circ}C$, and doping rate 1 wt.%, 2 wt.%, 3 wt.%. The characteristics of thin film on glass substrates which deposited by facing target sputtering in pure Ar atmosphere are reported. Ga doped zinc oxide film is attracted material through low resistivity, high transmittance, etc. When prepared target powder's structure was investigated by scanning electron microscope, densification and coarsening by driving force was observed. For each ZnO:Ga films with a $Ga_2O_3$ content of 3 wt.% at input power of 45W, the lowest resistivity of $9.967{\times}10^{-4}{\Omega}{\cdot}cm$ ($700^{\circ}C$) and $9.846{\times}10^{-4}{\Omega}{\cdot}cm$ ($800^{\circ}C$) was obtained. the carrier concentration and mobility were $4.09{\times}10^{20}cm^{-3}$($700^{\circ}C$), $4.12{\times}10^{20}cm^{-3}$($800^{\circ}C$) and $15.31cm^2/V{\cdot}s(700^{\circ}C)$, $12.51cm^2/V{\cdot}s(800^{\circ}C)$, respectively. And except 1 wt.% Ga doped ZnO thin film, average transmittance of these samples in the range 350-800 nm was over 80%.

이유시기가 한우 송아지의 발성빈도에 미치는 영향

이규호,유정원,김상욱,정왕용,이원현,이상락,Lee, Kyu-Ho,Yu, Jung-Won,Kim, Sang-Wook,Jung, Wang-Yong,Lee, One-Hyun,Lee, Sang-Rak 한국축산환경학회 2014 한국축산시설환경학회지 Vol.20 No.4

This study was conducted to investigate the effect of weaning period on the vocalization frequency of Hanwoo calf. Twelve Hanwoo calves were allocated into 4 groups, control (forced weaning on 90days) and treatment (weaning on 70, 90 and 120days with 5 adaptation days). After weaning, behavior and vocalization of Hanwoo calves were recorded on 3 consecutive days with closed circuit television (DTC-R5254, Digite Co., Ltd., Korea) and digital audio tape recorder (SR-900, Idamtech Co., Ltd., Korea). Vocalization frequency of Hanwoo calf were not significance difference with control and treatment group. Thus, additional studies of feed intake and body weight gain were needed to determine the weaning period of Hanwoo calves.

Performance of Annealed Polyacrylonitrile Nanofiltration Membrane

이규호,김인철,Lee Kew-Ho,Kim In-Chul The Membrane Society of Korea 2005 멤브레인 Vol.15 No.1

통합형 비대칭 폴리아크릴로니트릴(PAN) 한외여과막의 기공크기를 줄이기 위하여 아닐링을 하였다. 두 종류 PAN 고분자(단일중합체와 공중합체)의 화학적 구조가 아닐링에 미치는 영향을 조사하였다. PAN 고분자의 아닐링은 고분자의 화학적 구조에 큰 영향을 받는다. 공중합체가 단일중합체에 비해서 덜 강직한 구조를 지니므로 아닐링에 훨씬 큰 영향을 받는다. 아닐링을 실시하기 전에 고분자 내에 잔존하는 용매의 완벽한 제거를 위하여 분리막을 물 속에서 예열 처리하였다. 예열처리를 하지 않은 경우가 아닐링 효과가 더 컸다. 높은 온도에서 아닐링 하기 전에 예열을 하면 기공크기의 증가를 가져 왔다. 막의 표면은 약간 음전하를 띠었고 PAN 나노막의 염배제율은 다음과 같은 순서로 측정되었다: R(Na₂SO₄) > R(NaCl) > R(MgSO₄) > R(CaCl₂). Donnan 평형과 전기중성도에 의해서 염제거 거동을 설명하였다. The integrally skinned asymmetric PAN ultrafiltration membranes were annealed for reducing the pore size. The effect of the chemical structure of two PAN polymers (homo- and copolymer) on annealing was investigated. The annealing of PAN polymer was strongly affected by the chemical structure of the polymer. In other words, the annealing effect of the copolymer was much larger than that of the homopolymer due to its less rigid structure of the main chain. Before annealing, the membranes were usually preheated in water in terms of the complete removal of remained solvents in the membranes. The annealing effect was bigger when no preheating. However, the preheating of the membrane before annealing at high temperatures leads to an increase in the pore size of membranes. The surface of the membranes was slightly negative and the salt rejection of PAN nanofiltration membrane was in the following order: R(Na₂SO₄) > R(NaCl) > R(MgSO₄) > R(CaCl₂). This salt rejection behavior could be explained by the Donnan equilibrium and the electroneutrality.

육용 종계의 영양소 요구량에 관한 연구 2 . 육용 종계의 단백질 요구량에 관한 연구

이규호,한인규,이상진,강태홍,김강식 ( K . H . Lee,I . K . Han,S . J . Lee,T . H . Kang,K . S . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.3

In order to calculate the theoretical daily nutrient requirements for broiler breeder hens in relation to the weeks of age, estimates were made of daily needs for metabolizable energy, protein and amino acids using various prediction equations previously suggested by other researchers and compared each other and with the results of feeding trials. These were based on the average performance of hens on the production model calculated from the results of current studies by the author.

산성배수 발생저감을 위한 황철석 표면의 철인산염 피막형성 연구

이규호,김재곤,김탁현,이진수,Lee Gyoo Ho,Kim Jae Gon,Kim Tack Hyun,Lee Jin-Soo 대한자원환경지질학회 2006 자원환경지질 Vol.39 No.1

암석 또는 광미시료에 포함되어 있는 황철석의 산화에 의해 발생하는 산성배수를 저감하기 위하여 황철석 표면에 철인산염 피막을 형성시킬 수 있다. 첫 단계로 표준황철석을 이용한 실내실험을 통하여 최적의 피막형성 조건을 도출하였다. 피막형성제와 황철석을 24시간 반응시킬 때 최적조건은 $10^{-2}M\;KH_2PO_4,\;10^{-2}M\;H_2O_2$, PH 6으로 결정되었으며, 이 조건으로 황철석을 피막처리한 후 반사현미경, 주사전자현미경, 에너지분산분광기로 피막의 형성을 확인하였다. 피막의 내구성을 검증하기 위하여 온도 pH, 산화제의 농도변화에 따른 인산염의 용출을 조사한 결과, $4^{\circ}C$와 $70^{\circ}C$에서 온도의 영향은 거의 없었으며, 강산 또는 강알칼리 환경에서 $3.4\%$미만, 산화제의 농도별 조건하에서 $1.0\%$미만의 인산염이 피막으로부터 용출되었다. 실험 결과는 암석 또는 광미시료의 철인산염 피막형성 연구의 기초자료로 활용될 수 있을 것이다. Acid drainage occurs when sulfide minerals are exposed to an oxidizing environment. The objective of this study was to examine the optimum condition for creating a phosphate coating on standard pyrite surfaces for reduction of pyrite oxidation. The solution of $10^{-2}M\;KH_2PO_4,\;10^{-2}M\;H_2O_2$ was identified as the best phosphate coating agent for the reduction of pyrite oxidation. The formation of an iron phosphate coating on pyrite surfaces was confirmed with ore microscope and scanning electron microscope equipped with energy dispersive spectroscopy. The temperature did not significantly affect the formation of phosphate coating on the surface of pyrite. However, the phosphate coating was less stable at higher temperature than at lower temperature. The phosphate coating was quitely stable at wide range of pH and $H_2O_2$ concentration. The less than $3.4\%$ of phosphate was dissolved at pH 2.79 and 10.64 and less than $1.0\%$ of phosphate was dissolved at 0.1M $H_2O_2$. On the basis of these results, the phosphate coating can effectively reduce the negative environmental impact of acid rock drainage.

RSM 법에 의한Li₂O-Al₂O₃-SiO₂ (LAS) 유리의 소결 거동과 결정화에 대한 연구

이규호,김영석,정영준,김태호,서진호,류봉기,Lee, Kyu-Ho,Kim, Young-Seok,Jung, Young-Joon,Kim, Tae-Ho,Seo, Jin-Ho,Ryu, Bong-Ki 한국세라믹학회 2007 한국세라믹학회지 Vol.44 No.8

This paper presents results and observations obtained from a study of sintering behavior and crystallization in $Li_2O-Al_2O_3-SiO_2$ (LAS) Glass by screen printing method. The variable experimental conditions were determined carefully by Thermal-Mechanical Analyzer (TMA), Differential Thermal Analyzer (DTA) for setting the optimum transparent sintering conditions in LAS glass system, $10.5Li_2O-14.7Al_2O_3-58.1SiO_2-16.7B_2O_3(wt%)$, such as glass-ceramics which usually have low crystallization temperatures. Crystallization glasses generated during sintering was observed from diffraction patterns by X-Ray Diffraction (XRD), transmittance by UV-Vis spectrometer. Finally, the optimum sintering condition of LAS glass and the relation between factors and results in several sintering conditions were given by using Response Surface Methodology (RSM). From this study, we confirmed that crystallization interrupted densification during glass powder sintering. Furthermore, we observed that main effect of factors in glass powder sintering with concurrent crystallization depended on experimental conditions from main effects plot by MINTAB-14.