식물성 세포벽에 함유된 Ca과 P의 Rooster에 있어서 소화율에 관한 연구

김종쾌,김영규,김대진 東亞大學校 1992 東亞論叢 Vol.29 No.1

본 연구는 綠葉중에서 ladino clover 잎, alfalfa 잎, 칡잎, 아카시아잎, 싸리잎 등을 5월과 6월의 生育시기를 두 시기로 하여 동물 체내에서 Ca과 P 그리고 NDF에 결합된 Ca과 P의 이용성을 조사하였다. 실험에 사용된 동물은 10개월된 재래 숫탉(rooster)으로서 이들 綠葉은 체중 kg당 약 1% 강제 급여(forced feeding) 한 후 36시간 동안의 배설물을 채취하였으며, 이와 동시에 대사성 糞과 내인성 뇨로 분비되는 Ca과 P을 보정하기 위하여 36시간 절식시켜서 배설물을 채취하였다. 생체내 Ca과 P의 이용성 실험은 세번 반복을 하였으며, 대사성 분과 내인성 뇨 실험도 다섯번 반복을 실시하였는데 그 결과를 요약하면 다음과 같다. 1. NDF 含量에 있어서 綠葉(ladino clover잎, alfalfa 잎, 칡잎, 아카시아잎, 싸리잎)은 5월 예취가 30.42%-37.28% 범위였으며, 6월 예취는 45.43-59.36% 점위로 生育이 進行됨에 따라 增加하였다. (p<0.05). 2. 眞正 DM 消化率(TDMD)에 있어서 綠葉은 5월 예취가 24.75-47.24%의 범위였으며, 6월 예취는 23.31-42.20% 범위로 生育이 進行됨에 따라 減少하였다(p<0.01). 3. 眞正 이용 Ca(TACa)에 있어서 綠葉은 5월 예취가 7.94-56.65%의 범위였으며, 6월 예취는 4.02-51.09% 범위로 生育이 進行됨에 따라 alfalfa 잎은 增加하였으나, ladino clover 잎은 減少하였고(p<0.05), 칡잎, 아카시아잎은 뚜렷한 변화가 없었다. 4. 眞正 이용 P(TAP)에 있어서 綠葉은 5월 예취가 8.52-4.89%의 범위였으며, 6월 예취는 24.86-42.6%로 生育이 進行됨에 따라 增加하였으나 ladino clover 잎에서는 減少하였다(p<0.05). 5. NDF에 결합된 Ca의 이용율에 있어서 綠葉은 5월 예취가 4.04-15.80%의 범위였으며, 6월 예취는 3.23-8.11%로 生育이 進行됨에 따라 減少하였으나 (p<0.05), ladino clover 잎, 싸리잎은 뜨렷한 변화가 없었다. 6. NDF에 결합된 P의 이용율에 있어서 綠葉은 5월 예취가 3.97-17.01% 범위였으며, 6월 예취는 4.06-14.93%로 生育이 進行됨에 따라 ladino clover잎, 칡잎, 아카시아잎은 減少하였으나(p<0.05), la-dinl clover 잎과 싸리잎은 뚜렷한 변화가 없었다. 7. 綠葉에 있어서 TDMD(Y) 含量과 NDF 含量(X) 사이에는 Y=53.5-0.42X의 回歸式과 r=-0.50의 相關關係를 보였다(p<0.01). 8. Ladinl clover 잎의 P-D(Y)와 P 含量(X) 사이에는 Y=84.5-85.1X의 回歸式과 r=-0.91의 相關關係를 보였다(p<0.01). 9. Alfalfa 잎의 Ca-D(Y)와 Ca含量(x) 사이에는 Y=18.9+13.0X의 回歸式과 r=0.99의 相關關係를 보였다(p<0.01). 10. 칡잎의 P-D(Y)와 P含量(X) 사이에는 Y=139-368X의 回歸式과 r=-0.95의 相關關係를 보였다(p<0.01). 11. 아카시아잎의 P-D(Y)와 P含量(X) 사이에는 Y=87.8-229X의 回歸式과 r=-0.98의 相關關係를 보였다(p<0.01). 12. 싸리잎의 Ca-D含量(Y)과 Ca含量(X) 사이에는 Y=17.9-12.8X의 回歸式과 r=-0.83의 相關關係를 보였다(p<0.01). This experiment was conducted to evaluate the Ca and P bioavailabilities of green leaf meal by roos-ter. The cell wall binding Ca and P of green leaf meal such as ladino clover, alfalfa, kudzu, acacia and bush clover were collected by two stage of cutting for May and June 1990. Rooster employed in the present experiment were fed about one percentage of body weight by forced feeding of ingredient. Collection of excreta as fed after 36 hous and did not given ingredient during the determinate of urinary endogenous and metabolic fecal Ca, P and excreta for 36 hours. The feeding experiment was conducted triplication for bioassay of Ca and P and was give five repli-cation for composition of metabolic and endogenous material. The results obtained are summarized as follows : 1. The contents of neutral detergent fiber(NDF) of several green leaves meal were ranged from 30.42% to 37.28% for cutting of May and were ranged from 45.43% to 59.36% for cutting of June, there-fore NDF were decreased by abvanced stages of maturity(p<0.05). 2. The true dry matter digestibility(TDMD) of several green leaves meal were ranged from 24.57% to 42.24% for cutting of May and were ranged from 23.31% to 42.20% for cutting of June and TDMD was decreased by advanced stages of maturity(p<0.05). 3. The true available clacium(TACa) of several green leaves meal were ranged from 7.94% to 56.65% for cutting of May and were ranged from 4.02% to 51.09% for cutting of June, exception of alfalfa among other did not show increase by advanced stages of maturity(p<0.05). 4. The true avilable phosphorus(TAP) of several green leaves meal were ranged from 8.25% to 46.89% for cutting of May and were ranged from 24.86% to 42.6% for cutting of June and TAP was increased but decreased only ladino clover by advanced stages of maturity(p<0.05). 5. NDF binding of avilable calcium(NDF+Ca) of several green leaves meal were ranged from 4.04% to 15.80% for cutting of May and were ranged from 3.23% to 50 8.11% for cutting of June and they were decreased by advanced stages of maturity(p<0.05) but ladino clover and bush clover did not changed by advanced stage of maturity. 6. NDF binding of avilable phosphorus(NDF+P) of several green leaves meal were ranged from 3.97% to 17.01% for cutting of May and were ranged from 4.06% to 14.93% for cutting of June and they were decreased by advanced stages of maturity(p<0.05) but alfalfa and bush clover did not changed by advanced stage of maturity. 7. Regression equation and correlation coefficients of several green leaves meal between TDMD(Y) and NDF(X) were Y=53.5=0.42X and r=-0.50(p<0.01). 8. Regression equation and correlation coefficients of ladino clover leaf meal between digestible phos-phorus(Y) and phosphorus(X) were Y=84.5-85.1X and r=-0.91(p<0.01). 10. Regression euqation and correlation coefficients of kudzu leaf meal between digestible phosphours(Y) and phosphours(X) were Y=139-368X and r=-0.95(p<0.01). 11. Regression euqation and correlation coefficients of acacia leaf meal between digestible phosphours(Y) and phosphours(X) were Y=87.8-229X and r=-0.98(p<0.01). 12. Regression euqation and correlation coefficients of bush clover leaf meal between digestible calcium(Y) and calcium(X) were Y=17.9-12.8X and r=-0.83(p<0.05).

Integral domains with finitely many spectral semistar operations

Chang, G. W.,Oh, D. Y. John Wiley Sons, Ltd 2017 Frontiers of mathematics in China Vol.12 No.1

<P>Let D be a finite-dimensional integral domain, Spec(D) be the set of prime ideals of D, and SpSS(D) be the set of spectral semistar operations on D. Mimouni gave a complete description for the prime ideal structure of D with SpSS(D) = n + dim(D) for 1 aecurrency sign n aecurrency sign 5 except for the quasi-local cases of n = 4, 5. In this paper, we show that there is an integral domain D such that SpSS(D) = n+dim(D) for all positive integers n with n not equal 2. As corollaries, we completely characterize the quasi-local domains D with SpSS(D) = n+dim(D) for n = 4, 5. Furthermore, we also present the lower and upper bounds of SpSS(D) when Spec(D) is a finite tree.</P>

When D((X)) and D{{X}} are Prufer domains

Chang, G.W.,Oh, D.Y. North-Holland Pub. Co 2012 Journal of pure and applied algebra Vol.216 No.2

Let D be an integral domain, X be an indeterminate over D, and D[[X]] be the power series ring over D. For f@?D[[X]], let c<SUB>D</SUB>(f) denote the ideal of D generated by the coefficients of f. Let N={f@?D[[X]]|c<SUB>D</SUB>(f)=D}, N<SUB>t</SUB>={f@?D[[X]]|c<SUB>D</SUB>(f)<SUB>t</SUB>=D}, D((X))=D[[X]]<SUB>N</SUB>, and D{{X}}=D[[X]]<SUB>N't</SUB>. We show that D is a Krull domain if and only if D{{X}} is a Prufer domain, if and only if D[[X]]<SUB>P[[X]]</SUB> is a valuation domain for each maximal t-ideal P of D, if and only if D[[X]] is a PvMD in which each t-ideal is divisorial. We also show that D is a Dedekind domain if and only if D((X)) is a Prufer domain, if and only if D[[X]]<SUB>M[[X]]</SUB> is a valuation domain for each maximal ideal M of D.

Pepsin - Cellulase 에 의한 국내산 주요 조사료의 DMD 에 관한 연구 (3) 주요목초의 세포벽 구성물질과 건물소화율 (乾物消化率)

김대진(D . J . Kim),김영길(Y . K . Kim),황태기(T . K . Hwang),맹원재(W . J . Maeng) 한국영양사료학회 1989 韓國營養飼料學會誌 Vol.13 No.4

비타민 D3 의 경구투여 또는 자외선 조사가 브로일러 병아리의 증체 및 비타민 D3 대사에 미치는 영향

장윤환(Y . H . Chiang),황선일(S . I . Hwang),김중달(J . D . Kim),M . F . Holick(M . F . Holick) 한국영양사료학회 1995 韓國營養飼料學會誌 Vol.19 No.6

Implication of intracellular ROS formation, caspase-3 activation and Egr-1 induction in platycodon D-induced apoptosis of U937 human leukemia cells

Shin, D.Y.,Kim, G.Y.,Li, W.,Choi, B.T.,Kim, N.D.,Kang, H.S.,Choi, Y.H. Masson Pub. USA, Inc 2009 BIOMEDICINE AND PHARMACOTHERAPY Vol.63 No.2

Platycodon D is a major constituent of triterpene saponins found in the root of Platycodon grandiflorum, Platycodi Radix, which is widely used in traditional Oriental medicine for the treatment of many chronic inflammatory diseases. The results of previous studies have shown that this compound has in vitro growth-inhibitory activity in human cancer cells, however, the mechanism by which this action occurs is poorly understood. In this study, we examined the effects of platycodon D on the production of reactive oxygen species (ROS) and evaluated the association of these effects with apoptotic tumor cell death using a human leukemic U937 cell line. The results of this study demonstrate that platycodon D mediates ROS production, and that this mediation is followed by a decrease in mitochondrial membrane potential (MMP, ΔΨ<SUB>m</SUB>), activation of caspase-3, and cleavage of poly (ADP-ribose) polymerase (PARP). Both the cytotoxic effects and apoptotic characteristics induced by platycodon D treatment were significantly inhibited by z-DEVD-fmk, a caspase-3 inhibitor, which demonstrates the important role that caspase-3 plays in the observed cytotoxic effect. Additionally, the transcription factor early growth response-1 (Egr-1) gene was transcriptionally activated and the levels of non-steroidal anti-inflammatory drug (NSAID)-activated gene-1 (NAG-1) protein were elevated in platycodon D-treated U937 cells. However, the quenching of ROS generation in response to treatment with a ROS scavenger, N-acetyl-l-cysteine, reversed the platycodon D-induced apoptosis effects via inhibition of Egr-1 activation, ROS production, MMP collapse, and the subsequent activation of caspase-3. Although further studies are needed to demonstrate that increased expression of Egr-1 by platycodon D leads directly to NAG-1 induction and subsequent apoptosis, our observations clearly indicate that ROS induced through Egr-1 activation are involved in the early molecular events involved in the platycodon D-induced apoptotic pathway.

Effects of calcium doping on the superconducting properties of top-seeded melt growth processed Y_1.5Ba_2-xCa_xCu₃O_y superconductors

Park, S.D.,Kim, H.J.,Park, B.J.,Han, Y.H.,Jun, B.H.,Lee, J.S.,Kim, C.J. North-Holland 2011 Physica. C, Superconductivity Vol.471 No.21

The effect of calcium doping on the superconducting properties of top seeded melt growth (TSMG) processed Y<SUB>1.5</SUB>Ba<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>y</SUB> superconductors was studied in terms of calcium content (X<SUB>ca</SUB>). YBa<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> (X<SUB>ca</SUB>=0, 0.005, 0.01, 0.02, 0.04, 0.1, 0.3) powders were synthesized by the powder calcination method. YBa<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> powders were mixed with 0.25mole Y<SUB>2</SUB>O<SUB>3</SUB> powder and 1wt.% CeO<SUB>2</SUB> as Y<SUB>2</SUB>BaCuO<SUB>5</SUB> (Y211) refiner, and finally made into Y<SUB>1</SUB>.<SUB>5</SUB>Ba<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>y</SUB> (Y1.5)+1wt.% CeO<SUB>2</SUB> composition. The single Y123 growth on the top surface was observed up to X<SUB>ca</SUB>=0.1, while the multiple Y123 growth was observed at X<SUB>ca</SUB>≥0.1. The superconducting transition temperature (T<SUB>c</SUB>) and critical current density (J<SUB>c</SUB>) of TSMG processed Y1.5 samples were inversely proportional to X<SUB>ca</SUB>. The Y211 size increased with increasing X<SUB>ca</SUB> due to the enhancement of Y211 coarsening by calcium doping. No Y211 refining effect by CeO<SUB>2</SUB> was observed in the calcium doped samples. The T<SUB>c</SUB> and J<SUB>c</SUB> decrease by calcium doping are likely to be due to the calcium incorporation with the Y123 lattice and formation of coarse Y211 particles.

칡의 대량생산 이용과 생리활성물질에 관한 연구 (2) 당밀 , 칡즙 및 칡뿌리의 첨가가 칡사일리지의 발효품질과 사료적 가치에 미치는 영향

김대진(D . J . Kim),김영규(Y . K . Kim),맹원재(W . J . Maeng) 한국영양사료학회 1994 韓國營養飼料學會誌 Vol.18 No.2

RF 스위치 적용을 위한 박막 PZT 엑추에이터의 d<SUB>31</SUB> 구동과 d<SUB>33</SUB> 구동 특성 비교

신민재(M. J. Shin),서영호(Y. H. Seo),최두선(D-S. Choi),황경현(K-H. Hwang) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월

In this work, we present the comparison between d<SUB>31</SUB> and d<SUB>33</SUB> mode characterization using the PZT micro-actuator for large displacement. The PZT micro-actuator consisted of Si, PZT, and Pt layer on SOI wafer. The electrode shapes were laminated and interdigitated for d<SUB>31</SUB> and d<SUB>33</SUB> mode, respectively. In order to characterize the actuation mode, we measured the displacement using laser interferometer. The maximum displacement of d<SUB>31</SUB> mode was 12.2㎛ at 10V, the actuation characterization of d<SUB>31</SUB> was better than that of d<SUB>33</SUB> mode. We estimated that displacement of d<SUB>33</SUB> mode would be larger than that of d<SUB>31</SUB> above 30V.

Effects of Y₂O₃ additions on the oxygen diffusion in top-seeded melt growth processed YBa₂Cu₃O_7-y superconductors

Jun, B.H.,Jung, S.A.,Park, S.D.,Park, B.J.,Han, Y.H.,Kim, C.J. North-Holland 2011 Physica. C, Superconductivity Vol.471 No.21

To understand the effect of Y<SUB>2</SUB>BaCuO<SUB>5</SUB> (Y211)/YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-y</SUB> (Y123) interfaces on the oxygen diffusion in single grain YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-y</SUB> superconductors, single grain Y123 superconductors with 0.05 and 0.3moles of Y<SUB>2</SUB>O<SUB>3</SUB> additions were fabricated by a top-seeded melt growth (TSMG) process. Y123 compacts with Y<SUB>2</SUB>O<SUB>3</SUB> additions were subjected to melt growth heating cycles with a cooling rate of 1<SUP>o</SUP>C/h through a peritectic temperature (1015<SUP>o</SUP>C) and then annealed at 450<SUP>o</SUP>C for 200h in flowing oxygen. The superconducting temperature (T<SUB>c</SUB>) and critical current density (J<SUB>c</SUB>) were estimated for the three different regions (top surface (s), intermediate (i) and center (c)) of samples. The amount of Y211/Y123 interface area in single grain Y123 superconductors was successfully controlled by Y<SUB>2</SUB>O<SUB>3</SUB> additions. The T<SUB>c</SUB> values of s regions were higher than those of i and c regions, which indicates the presence of more oxygen at the sample surfaces. In addition, the T<SUB>c</SUB> values of i and c regions of the Y123 sample with 0.3mole Y<SUB>2</SUB>O<SUB>3</SUB> addition were higher than those of the same regions of the Y123 sample with 0.05mole Y<SUB>2</SUB>O<SUB>3</SUB> addition due to the promoted oxygen diffusion through Y211/Y123 interfaces and other related defects. In spite of the promoted oxygen diffusion by Y<SUB>2</SUB>O<SUB>3</SUB> addition, the large T<SUB>c</SUB> difference among the regions still existed, which suggests sluggish oxygen diffusion into single Y123 grains.