질소 시비량이 정예피의 생육특성 , 수량 , 및 조성분 함량에 미치는 영향

조남기,강영길,조영일,부창훈 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.2

A native cultivar of Japanese millet [Echinochloa crusgalli var. frumentacea (Roxb.) W. F. Wight) was grown with N rates of 0, 50, 100, 150, 200, and 250 ㎏/㏊ from 31 May to 6 September in 1999 to determine the optimum N rate for forage production in a volcanic ash soil of Jeju island. Half of N fertilizer rate was applied at planting and half at 60 days after planting. Days to heading increased from 84 to 90 days as nitrogen rate increased from 0 to 250㎏/㏊. Plant height increased from 144 to 183 cm with increasing nitrogen rate. However, there was no significant difference between 200 and 250 ㎏ N/㏊ for the two characteristics. Increasing N rate from 0 to 250 ㎏/㏊ increased dry matter (DM) yield from 6.76 to 12.67 MT/㏊, crude protein yield from 0.47 to 1.21 MT/㏊, and total digestible nutrients (TDN) yield from 3.46 to 7.18 MT/㏊. However, no significant differences in these yields were found between 200 and 250 ㎏ N/㏊. Nitrogen uptake increased from 75.1 to 194.2 ㎏/㏊ but N use efficiency decreased from 90.0 to 65.2 ㎏ DM/㎏ N with increasing N from 0 to 250 ㎏/㏊. As N rate increased from 0 to 250 ㎏/㏊, CP and TDN contents increased from 6.9 to 9.6% and from 51.3 to 56.7%. respectively. while crude fiber content decreased from 39.5 to 35.9%. Ether extract and nitrogen free extract contents increased up to 200 ㎏ N/㏊ and then did not significantly increase with the further increase in N rate. Crude ash content decreased up to 200 ㎏ N/㏊ and then did not significantly decrease with the further increase in N rate. Based on the these findings, the optimum N rate for forage production of Japanese millet seems to be about 200 ㎏/㏊ in volcanic ash soils of Jeju island.

제주지역에서 질소분시에 따른 귀리의 생육특성 , 사초수량 및 조성분 변화

조남기,조영일,송창길,송승운,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.4

This study was conducted at a volcanic ash soil of Jeju island from 1997 to 1998 to determine the optimum frequency of split N application for forage production of oats. Nitrogen fertilizer was applied with 240㎏ N/ha, and frequencies of the split applications were 1, 2, 3, 4 and 5 times. Days to heading increased from 160 to 163 days as N was split-applied from one to five applications. Plant height was greatest(195.7㎝), followed by nitrogen application of at five applications. Generally plant height was shortest as the number of splitting nitrogen application treatments was decreased. This pattern held for leaf length, leaf width, and culm length which were greatest in four and five applications respectively, but no. of grains per panicle and No. of spikelet per panicle which were increased in three applications with 54.0 and 22.2 respectively. Fresh forage yield increased from 36.63 to 51.70MT/ha, dry matter(DM) yield from 6.47 to 8.43MT/ha, crude protein(CP) yield from 0.75 to 1.20MT/ha, total digestible nutrients(TDN) yield from 3.22 to 4.65MT/ha as N was split-applied from one to four applications, and then decreased to 51.07, 7.63, 1.12 and 4.48MT/ha respectively, in five split applications. Grain yield increased from 4.70 to 5.67MT/ha as N was split-applied from one to three applications and then decreased to 5.07MT/ha in five applications. This pattern held for test weight and 1,000 grains weight which were heaviest in three applications with 366.5 and 37.8g, respectively. Nitrogen uptake increased from 120 to 191.2㎏/ha as N was split-applied from one to four applications, and then decreased to 178.7㎏/ha in five split applications. Nitrogen use efficiency decreased from 53.9 to 42.7 ㎏ DM/kg N with increasing split N applications. Crude protein content increased from 11.6 to 14.6%, ether extract content from 2.3 to 4.0%, nitrogen free extract content from 39.7 to 41.6%, and TDN content from 49.8 to 57.4%, but crude ash content decreased from 8.7 to 6.1% and crude fiber from 31.6 to 27.4% as N was split-applied from one to five applications. These results indicate that the optimum frequency of split N applications is oats in volcanic ash soils of Jeju island.

질소분시가 청예피의 생육특성 , 수량 및 조성분 함량에 미치는 영향

조남기,강영길,부창훈 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.2

This study was conducted at a volcanic ash soil of Jeju island in 1999 to determine the optimum frequency of split N application for forage production of Japanese millet [Echinochloa crusgalli var. frumentacea (Roxb.) W. F. Wight]. Nitrogen fertilizer was applied with 200 ㎏ N/㏊, and frequencies of the split applications were 1, 2, 3, 4 and 5 times. A Jeju native cultivar of Japanese millet was planted at a rate of 30 ㎏ seed/㏊ on 31 May, and harvested on 6 September. Days to heading increased from 84 to 88 days as N was split-applied from one to five applications. Plant height increased from 152 to 188 cm as N was split-applied from one to three applications and then decreased to 156 cm in five applications. This pattern held for leaf length, leaf width, and stem diameter which were greatest in three applications with 42.4, 2.6, and 0.67 ㎝, respectively. Green leaf number was 10 regardless of the treatments. Dry matter (DM) yield increased from 6.96 to 11.99 MT/㏊, crude protein (CP) yield from 0.47 to 0.89 MT/ha, and total digestible nutrients (TDN) yield from 3.80 to 6.81 MT/㏊ as N was split-applied from one to three applications, and then decreased to 7.51, 0.63 and 4.43 MT/ha, respectively, in five split applications. Nitrogen uptake increased from 75.1 to 142.9 ㎏/㏊ as N was split-applied from one to three applications and then decreased to 101.3 ㎏/㏊ in five split applications. Nitrogen use efficiency decreased from 92.8 to 74.1 ㎏ DM/㎏ N with increasing split N application. Crude protein content increased from 6.7 to 8.4%, ether extract content from 5.7 to 6.1%, nitrogen free extract content from 30.7 to 34.7%, and TDN content from 48.0 to 53.0%, but crude ash content decreased from 10.2 to 8.0% and crude fiber from 38.9 to 35.5% as N was split-applied from one to five applications. These results indicate that the optimum frequency of split N applications is three times for forage production of Japanese millet in volcanic ash soils of Jeju island.

Control of phonon transport by the formation of the Al2O3 interlayer in Al2O3-ZnO superlattice thin films and their in-plane thermoelectric energy generator performance

Park, N. W.,Ahn, J. Y.,Park, T. H.,Lee, J. H.,Lee, W. Y.,Cho, K.,Yoon, Y. G.,Choi, C. J.,Park, J. S.,Lee, S. K. Royal Society of Chemistry 2017 Nanoscale Vol.9 No.21

<P>Recently, significant progress has been made in increasing the figure-of-merit (ZT) of various nanostructured materials, including thin-film and quantum dot superlattice structures. Studies have focused on the size reduction and control of the surface or interface of nanostructured materials since these approaches enhance the thermopower and phonon scattering in quantum and superlattice structures. Currently, bismuth-tellurium-based semiconductor materials are widely employed for thermoelectric (TE) devices such as TE energy generators and coolers, in addition to other sensors, for use at temperatures under 400 K. However, new and promising TE materials with enhanced TE performance, including doped zinc oxide (ZnO) multilayer or superlattice thin films, are also required for designing solid-state TE power generating devices with the maximum output power density and for investigating the physics of in-plane TE generators. Herein, we report the growth of Al2O3/ZnO (AO/ZnO) superlattice thin films, which were prepared by atomic layer deposition (ALD), and the evaluation of their electrical and TE properties. All the in-plane TE properties, including the Seebeck coefficient (S), electrical conductivity (sigma), and thermal conductivity (kappa), of the AO/ZnO superlattice (with a 0.82 nm-thick AO layer) and AO/ZnO films (with a 0.13 nm-thick AO layer) were evaluated in the temperature range 40-300 K, and the measured S, s, and. were -62.4 and -17.5 mu V K-1, 113 and 847 (Omega cm)(-1), and 0.96 and 1.04 W m(-1) K-1, respectively, at 300 K. Consequently, the in-plane TE ZT factor of AO/ZnO superlattice films was found to be similar to 0.014, which is approximately two times more than that of AO/ZnO films (ZT of similar to 0.007) at 300 K. Furthermore, the electrical power generation efficiency of the TE energy generator consisting of four couples of n-AO/ZnO superlattice films and p-Bi0.5Sb1.5Te3 (p-BST) thin-film legs on the substrate was demonstrated. Surprisingly, the output power of the 100 nm-thick n-AO/ZnO superlattice film/p-BST TE energy generator was determined to be similar to 1.0 nW at a temperature difference of 80 K, corresponding to a significant improvement of similar to 130% and similar to 220% compared to the 100 nm-thick AO/ZnO film/p-BST and n-BT/p-BST film generators, respectively, owing to the enhancement of the TE properties, including the power factor of the superlattice film.</P>

말라리아박멸을 위한 조사연구 : 1. 말라리아 유행지역 주민의 항체보유율 변화 1. The study for the malaria eradication 1. The seasonal changes of antibodies of inhabitants lived in malaria epidemic areas

김동수,이형우,조신형,인태숙,이혜정,이욱교,김남렬,신민철,문승욱,임현정,고승연,이종수 국립보건연구원 2000 국립보건원보 Vol.37 No.-

제주도에서 차풀의 파종기 이동에 따른 생육반응 수량 및 사료가치 변화

조남기,조영일,송창길,오은경,고지병 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.5

This study was conducted to determine the influence of seeding date on growth, characteristic yield and chemical composition of Cassia mimosoides var. nomame from March 11, 1998 to December 1998 in Cheju Province. Days to flowering were lessened as seeding date was delayed. The plant height of Cassia mimosoides var. nomame was the longest when seeded on 31 March(99㎝) than at the other seeding date. When seeded before 31 March, stem diameter, number of leaves increased as seeding date was late, while number of branches remained constant. And numbers of withering leaves were increased as seeding date was earlier. Fresh forage yield per ha, for Cassia mimosoides var. nomame was the greatest (46.60MT) at 31 March seeding, the second was 43.97 MT at 10 April seeding and the reduced the 34.73MT at 11 March seeding. Also dry matter yield, crude protein yield and total digestible nutrient(TDN) yield per ha was nearly the same tendency. Crude protein, crude fat percent were the greatest at 31 March seeding and than decreased with further increased at seeding date. Crude ash and crude fiber percent tended to decrease as seeding date was delayed. Nitrogen free extract (NFE) and TDN percent tended to increase as seeding date was delayed.

Effect of contrast-induced nephropathy on cardiac outcomes after use of nonionic isosmolar contrast media during coronary procedure

Cho, J.Y.,Jeong, M.H.,Hwan Park, S.,Kim, I.S.,Park, K.H.,Sim, D.S.,Yoon, N.S.,Yoon, H.J.,Park, H.W.,Hong, Y.J.,Kim, J.H.,Ahn, Y.,Cho, J.G.,Park, J.C.,Kang, J.C. Japanese College of Cardiology 2010 Journal of cardiology Vol.56 No.3

Contrast-induced nephropathy (CIN) has been increasing and seems to be associated with clinical outcomes in ischemic heart disease. This study aimed to assess the incidence, predictors, and cardiac outcomes of CIN when nonionic isosmolar contrast media (iodixanol, Visipaque<SUP>(</SUP>R), GE Healthcare, Cork, Ireland) was used. Between January 2005 and July 2008, 510 patients (69.2+/-9.0 years of age, 384 men) undergoing diagnostic coronary angiography (CAG) or percutaneous coronary intervention (PCI) were divided into two groups according to the development of CIN (CIN group: n=74; non-CIN group: n=436). CIN developed in 74 patients (14.5%). They were more likely to have diabetes (55.4% vs. 42.9%, p=0.045), decreased left ventricular ejection fraction (LVEF) (50.1+/-12.6% vs. 57.7+/-13.9%, p<0.001), and lower baseline hematocrit level (32.4+/-5.3% vs. 36.6+/-5.5%, p<0.001). Multiple logistic regression analysis revealed baseline hematocrit (odds ratio 0.900, 95% confidence interval 0.851-0.952, p<0.001), decreased LVEF (odds ratio 0.967, 95% confidence interval 0.949-0.986, p=0.001), and baseline creatinine level (odds ratio 2.317, 95% confidence interval 1.252-4.286, p=0.007) as independent predictors of CIN. At 1-year follow-up, patients with CIN were found to have more adverse outcomes than without CIN in Cox proportional hazards analysis (hazard ratio 13.068, 95% confidence interval 2.425-70.434, p=0.003). CIN was mostly associated with baseline creatinine level rather than CM amount using nonionic isosmolar CM. We found that patients with CIN had worse event-free survival than patients without CIN after multifactorial adjustment.

Attenuation of oxidative neuronal cell death by coffee phenolic phytochemicals

Cho, E.S.,Jang, Y.J.,Hwang, M.K.,Kang, N.J.,Lee, K.W.,Lee, H.J. Elsevier 2009 Mutation research Vol.661 No.1

Neurodegenerative disorders such as Alzheimer's disease (AD) are strongly associated with oxidative stress, which is induced by reactive oxygen species (ROS) including hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>). Recent studies suggest that moderate coffee consumption may reduce the risk of neurodegenerative diseases such as AD, but the molecular mechanisms underlying this effect remain to be clarified. In this study, we investigated the protective effects of chlorogenic acid (5-O-caffeoylquinic acid; CGA), a major phenolic phytochemical found in instant decaffeinated coffee (IDC), and IDC against oxidative PC12 neuronal cell death. IDC (1 and 5μg/ml) or CGA (1 and 5μM) attenuated H<SUB>2</SUB>O<SUB>2</SUB>-induced PC12 cell death. H<SUB>2</SUB>O<SUB>2</SUB>-induced nuclear condensation and DNA fragmentation were strongly inhibited by pretreatment with IDC or CGA. Pretreatment with IDC or CGA also inhibited the H<SUB>2</SUB>O<SUB>2</SUB>-induced cleavage of poly(ADP-ribose) polymerase (PARP), and downregulation of Bcl-X<SUB>L</SUB> and caspase-3. The accumulation of intracellular ROS in H<SUB>2</SUB>O<SUB>2</SUB>-treated PC12 cells was dose-dependently diminished by IDC or CGA. The activation of c-Jun N-terminal protein kinase (JNK) and p38 mitogen-activated protein kinase (MAPK) by H<SUB>2</SUB>O<SUB>2</SUB> in PC12 cells was also inhibited by IDC or CGA. Collectively, these results indicate that IDC and CGA protect PC12 cells from H<SUB>2</SUB>O<SUB>2</SUB>-induced apoptosis by blocking the accumulation of intracellular ROS and the activation of MAPKs.

제주지역에서 파종량 차이에 따른 귀리의 생육특성 , 사초수량 및 조성분 변화

조남기,조영일,송창길,송승운,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.4

Oats was grown at five seeding rates(90, 110, 130, 150 and 170㎏/㏊) from Nov. 8, 1998 to June 8, 1999 at Jeju island to determine influence of seeding rate on agronomic characters and forage yield and quality. Days to heading and days to maturing increased 164-166 and 206-208 days as seeding rate increased from 90 to 170㎏/㏊. The plant height increased from 118.5 to 122.6㎝ as seeding rate was increased from 90 to 150㎏/㏊ and then decreased to 122.1㎝ at a rate of 170㎏/㏊. This pattern held for leaf length, leaf width and culm length which were greatest in four seeding rate respectively, but no. of grains per panicle and no. of spikelet per panicle which were decreased as seeding rate increased from 90 to 170㎏/㏊. As seeding rate increased from 90 to 150㎏/㏊, fresh forage, dry matter, crude protein and total digestible nutrients(TDN) yield increased from 29 to 43.43, 4.77 to 8.27, 0.55 to 1.10 and 2.33 to 4.39MT/㏊, respectively, and then decreased with further increased seeding rates. Grain yield was increased from 1.33 to 6.10MT/㏊ as seeding rate was increased from 90 to 130㎏/㏊ and then decreased from 5.50 to 4.50MT/ha at the 150 and 170㎏/㏊ seeding rates. Test weight and 1,000 grains weight decreased as seeding rate was increased. Crude protein, ether extract, nitrogen free extract and TDN content increased 11.5 to 13.8%, 2.0 to 3.1%, 37.6 to 39.2%, 48.8 to 54.2% respectively, but crude fiber content decreased 35.1 to 32.2% and crude ash declined 8.5 to 6.5% as seeding rate increased from 90 to 170㎏/㏊. The optimum seeding rate to obtain the highest TDN yield was estimated to be 167.5㎏/㏊.

뇌전산화 단층촬영에 의한 뇌동맥류의 수술전 진단

정남,조기홍,김한규,조경기 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.4

The authors analyzed the computed tomography (CT) findings in 69 patients with intracranial aneurysm. The indirect evidences for the diagnosis of an aneurysm in this series consisted of subarachnoid hemorrhage (53/69), intracerebral hematoma (24/69), dilatation of ventricle (19/69). infarction (8/69), intrventricular hematoma (7/69), and subdural hematoma (1/69). Visualization of aneurysms were possible in 6 out of 69 patients. In sites of blood by CT, the suprasellar cistern was most common and the sylvian cistern next Ventricular dilatations were seen in the patients with aneurysm of internal carotid artery most commonly and next in those with anterior communicating artery The higher the CT grade was, the poorer the clinical grade was and the more severe the vasospasm. Close correlation was present between the blood in CT and vasospasm.