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.

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.

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.

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.

두개기저골 골절 160예에 대한 임상적 고찰 : Clinical Analysis of 160 Cases

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

Although the presence of a linear skull fracture involving the cranial vault is very often of no clinical significance, the same is not true of fracture of the base. The authors analyzed 160 cases of basal skull fracture treated in the department of Neurosurgery, presbyterian Medical center from May 1980 to Apr 1985. Clinical features and radiological findings were reviewed, analyzed and correlated each other. The result of the analysis are summarized as follow: 1) The basal skull fractures were more common in man than woman the ratio of 13:3. 2) Clinical features were otorrhea (61.2%), racoon eye (22.5%), and hearing loss (20%) etc in decreasing order. 3) Combined pathologies were skull fracture (45%), subdural hematoma (13.7%), epidural hematoma(11.2%), and pneumocephalus(10%) etc. in decreasing order. 4) The facial nerve, vestibule- cochlear nerve, and olfactory nerve were most common cranial nerves injured. 5) Among the visible fractures in simple X-ray, longitudinal fractures were more common than transverse fractures. 6) CSF leakage were noted in 126 cases, and among them immediate type was far more common (93.6%) than delayed type. 7) Incidence of meningitis was 5%, and most of them were associated with CSF leakage. 8) The infection rate was higher when the CSF leak persisted over 7 days.

n형 4H-SiC의 Cu/Si/Cu 오옴성 접합

정경화,조남인,김민철 선문대학교 ·중소기업기술지원연구소 2002 선문공대 연구/기술 논문집 Vol.7 No.1

n형 Sic를 이용한 오옴성 접합을 알아보고자 Cu/Si/Cu 형태의 접합실험을 실시하였다. 오 옴성 접합의 형성을 위하여 Cu/Si/Cu를 증착 하고 열처리를 시행하였다. 열처리는 RTP를 이용한 진공상태의 2-step 방법으로 시행하였다. 접합에 계산을 위하여 TLM구조로, 면 저항(R_S), 접촉저항(R_C), 이동거리(L_T), 패드간거리(d), 저항(R_T)값을 구하면 접합비저항(ρ_C) 값을 알 수 있다. 이로 인한 결과 값은 접촉저항 값은 2Ω이었고, 이동간 거리는 1㎛이었으며 접합비저항(ρ_C)=1.0×10 exp (-6) Ω㎠ 값을 얻을 수 있었다. 물리적 변화를 AES 및 XRD를 이용하여 알아보았다. SiC 계면 상에 Cu의 변화로 인한 silicide형성이 이루어짐을 알 수 있었다. Characteristics of Cu/Si/Cu ohmic contacts to n-type 4H-SiC were investigated systematically. The ohmic contacts were formed by rf sputtering of multi layer Cu/Si/Cu sputtered sequentially. The annealings were performed with 2-step using RTP in vacuum ambient. The specific contact resistivity(ρ_C), sheet resistance(R_S), contact resistance(R_C), transfer length(L_T) were calculated from resistance(R_T) versus contact spacing(d) measurements obtained from TLM(transmission line method) structure. Best results were obtained for a sample annealed at vacuum as ρ_C = 1.0×10 exp (-6) Ω㎠, R_C = 2Ω and L_T = 1㎛. The physical properties of contacts were examined using XRD and AES. The results showed that copper silicide was formed on SiC and Cu was migrated into SiC.

제주매조의 주당본수에 따른 주요형질 사초수량 및 조성분 변화

조남기,송창길,김인식,조영일,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.6

본 연구는 제주지역에서 주당 본수(1, 2, 3, 4, 5 및 6본)에 따른 제주매조(Setaria italica Beauvois)의 주요형질, 수량성 및 사료가치를 검토하고, 가축의 조사료로 이용하기 위하여 2000년 5월 13일부터 8월 14일까지 수행하였으며, 그 결과를 요약하면 다음과 같다. 이삭 출현일수는 83일에서 87일로 주당본수간에 큰 차이가 없었으나, 본수가 많을수록 이삭출현일수는 지연되는 경향이었다. 초장은 주당 1본에서 183.3㎝였던 것이 주당 3본에서 187.1㎝로 길어졌으나, 본수가 그 이상으로 증가되면 점차적으로 짧아져서 주당 6본에서 초장은 163.9㎝였다. 엽장, 엽폭, 엽수, 절수, 경직경 및 엽록소 측정치는 주당 본수가 1본에서 6본으로 많아질수록 왜소한 경향이었다. 생초수량, 건물수량, 조단백질 수량 및 TDN 수량은 주당 3본 파종구에서 각각 55.02MT/ha, 15.38MT/ha, 1.68MT/ha, 7.18MT/ha으로 가장 높았으나, 그 이상과 그 이하의 본수에서는 점차적으로 감수되었고, 주당 6본에서는 TDN 수량이 4.07MT/ha로 감수되었다. 주당 본수가 1본에서 6본으로 많아짐에 따라 조단백질 함량은 10.4%에서 12.0%로, 조지방 함량은 1.5%에서 1.6%로, 가용무질소물은 36.8%에서 38.2%로, TDN 함량은 45.9%에서 48.2%로 직선적으로 증가된 반면 조회분 함량은 9.2%에서 8.4%로, 조섬유 함량은 36.2%에서 33.7%로 감소되는 경향이었다. Jeju Itallian millet was grown at six plants per hill (1,2,3,4,5,6) from May 13 to Aug. 14, 2000 at Jeju island to determine influence of plants per hill on agronomic characters, forage yield and quality. Days to heading was increased as number of plants per hill was decreased. Plant height with three plants per hill (187.1㎝) was the longest, while with six plants per hill (163.9㎝) was the shortest. Leaf length, leaf width, the number of leaves, the number of nodes, stem diameter and SPAD reading values gradually decreased as the number of plants per hill was increased. Fresh forage yield, dry matter (DM) yield, crude protein (CP) yield and total digestible nutrient (TDN) yield were the greatest (55.02, 15.38, 1.68, 7.18MT/ha) at the three plants per hill. TDN gradually decreased to 4.07MT/ha in six plants per hill. Crude protein content increased from 10.4 to 12.0%, ether extract content from 1.5 to 1.6%, nitrogen free extract content from 36.8 to 38.2 and TDN content from 45.9 to 48.2%, but crude fiber content decreased from 36.2 to 33.7% and crude ash content from 9.2 to 8.4% as the number of plants per hill was increased.

마이크로 센서용 다채널 전해질 분석기의 샘플챔버 개선 및 샘플상호간의 간섭현상 보정

박준경,성기웅,배상곤,진경찬,김명남,손병기,조진호 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

In this paper, the sample chamber for multichannel electrolyte analyzing system was designed and the correction algorithm for interference among samples was proposed. The sample chamber was designed to replace the ISFET sensor more easier. The principles of design were the structural independency of each channel and the shield of sample solution from air contact. The correction algorithm could reject the interference effect of mixed sample solution and compensate the voltage difference between single electrolyte solution and mixed electrolyte solution. To approve the proposed algorithm, the several experiments were carried out under the condition of mixed samples. We acknowledged that with our proposed algorithm, the sensor output influenced by mixed electrolyte solution was improved with measurement accuracy.