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성기승,윤칠석,이남형,한찬규,이복희 한국축산학회 2000 한국축산학회지 Vol.42 No.1
The experiment was conducted to determine the effects of various commercial feed additives on specific components in shell egg and to develop a new type of brand egg. Forty-four week old ISA Brown layers were randomly assigned to 8 treatments. Hens of each treatment were 300 and treatment was replicated 3 times. Experimental period was 10 weeks. The 8 treatments were as follows: astarich^ⓡ 2%(B), astarich^ⓡ 5%(C), chitin+chitosan 2%(D), omega-3 powder 2%(E), pyrogreen 1%(F), greenpia 0.2%(G), hydrogenated soy oil 3%(H) and commercial layer feed(A). Eggs were collected at day 0, 7, 14, 40 and 70 for chemical analyses. Chemical analyses were done for vitamins A and E, cholesterol and fatty acid profile of egg yolks. During the experimental period, the contents of vitamin A increased overall. Astarich^ⓡ 5%(C) group showed the highest amounts of vitamin A (11.14±3.93 ㎍/g yolk) whereas commercial layer feed goup(A) showed the lowest amounts of vitamin A(8.65±1.97 ㎍/g yolk). Vitamin E contents were significantly different among treatments at day 7, 40, and 70 (p$lt;0.05). Mean value of vitamin E (99.66±8.30 ㎍/g yolk) was the highest in omega-3(E) group and the lowest in pyrogreen (F) group (53.49±11.36 ㎍/g yolk). Yolk cholesterol contents tended to increase, although the fluctuation existed somewhat depending on the day of measurement. The highest value of yolk cholesterol(11.71±0.50㎎/g yolk) was observed in astarich^ⓡ 2%(B) group and the Lowest value(9.45±2.32㎎/g yolk) in pyrogreen (F) group. The mean compositions of yolk fatty acids during the experimental period were 37.3∼39.6% for saturated fatty acids(SFA), 39.3∼41.3% for monounsaturated fatty acids(MUFA), 16.2∼18.9% for omega-6 fatty acids and 2.20∼5.36% for omega-3 fatty acids. In general, the concentrations of SFA and omega-6 fatty acids decreased, while those of MUFA tended to increase. On the other hand, eicosapentaenoic acid(C_(20:5) ω6, EPA) and docosapentaenoic acid(C_(22:5) ω3, DPA) were detected only in astarich^ⓡ 5%(B) and omega-3(E) groups where the docosahexaenoic acid(C_(22:6) ω3, DHA) concentration was over twice higher than those of other group. The study proved both astarich^ⓡ and omega-3 powder were suitable to produce brand eggs specially high in certain components.
임신토끼에 있어서 새로운 Recombinant Human Granulocyte Colony - Stimulating Factor ( YHB6211 ) 의 배 , 태자 발생독성평가
황재식(Zai Zhi Huang),이수해(Su Hae Lee),신지순(Ji Soon Sin),신장우(Jang Woo Sin),최연식(Yeon Shik Choi),김대중(Dae Joong Kim),장호송(Hu Song Zhang),정은용(Eun Yong Jung),서동석(Dong Suk Seo),안경규(Kyoung Kyu Ahn),남상윤(Sang Yoon N 한국응용약물학회 2001 Biomolecules & Therapeutics(구 응용약물학회지) Vol.9 No.4
N/A YHB6211, a newly developed recombinant human granulocyte colonystimulating factor, was administered at dose levels of 0, 3, 15, and 75 ㎍/㎏/day intravenously to the pregnant New Zealand White rabbits (20 rabbits per group) during the organogenetic period, days 6 to 18 of gestation. All dams were subjected to Caesarian section on day 28 of gestation and their fetuses were examined for external, visceral, and skeletal abnormalities. No abnormalities in clinical signs, body weight changes, gross findings, mortality, and external appearance were found in all dams and fetuses exposed to 0, 3, and 15 ㎍/㎏/day of YHB6211. However, in the group treated with 75 ㎍/㎏/day of YHB6211, maternal body and uterine weights, fetal body weights and length, and the number of live fetuses were significantly decreased and further fetal mortality was remarkably increased. It is suggested that YHB6211 may have no side effect up to the dose level of 15 ㎍/㎏/day, and there would be no teratogenicity for fetuses of rabbits up to 75 ㎍/㎏/day even if it may have some toxic effects over 75 ㎍/㎏/day for dams and fetuses of rabbits.
회전식 열풍건조기를 이용한 하수슬러지의 건조특성에 관한 연구
고현웅,윤선영,정병길,김대용,박성현,박종순,성낙창 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1
The objective of this study was investigated the drying characteristics of sewage sludge by rotary hot air dryer. The rotary hot air dryer was manufactured a lab-scale and designed to use the waste heat source in incinerator. This study was shown that the drying characteristics of rotary hot air dryer mainly depended on the inlet hot air temperature and impeller speed.
In Eun Jin,Min Kyung Joo,Bak Sang-In,Kim Do Yoon,함철민,Shim Chungbo,Zhou Yujie,Hong Seung-Woo,Park Tae-Sun,Shin Jae Won,Bhoraskar V. N. 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.9
The cross sections of 89Y(n,3n)87m,87gY and 209Bi(n,4n)206Bi reactions at a neutron energy of 30 MeV are measured by making use of neutron beams of continuous energy spectra and a subtraction method. By impinging proton beams of 30 and 35 MeV to a thick beryllium target, neutron beams of continuous and broad energy spectra are produced and are guided to Y and Bi sample targets. The difference between the two neutron spectra generated by two neighboring proton energies is found to be peaked in a narrow energy range and thus can be regarded as quasi-monoenergetic, which can be used to extract (n,xn) cross sections. The uncertainty in the neutron fluence is reduced by analyzing the activities of aluminum and niobium reference samples placed on top of the Y and Bi samples. The use of a subtraction method by employing neutron beams of continuous energy spectra gives us the 89Y(n,3n)87m,87gY and 209Bi(n,4n)206Bi cross sections in fair agreement with the existing experimental data and nuclear data libraries.
Sung, Y.T.,Kim, Y.S.,Lee, Y.K.,Kim, W.N.,Lee, H.S.,Sung, J.Y.,Yoon, H.G. Wiley Subscription Services, Inc., A Wiley Company 2007 Polymer engineering and science Vol.47 No.10
<P>The effects of clay on the morphology of the poly(acrylonitrile-butadiene-styrene) (ABS)/polypropylene (PP) nanocomposites were investigated. From the studies of wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM) analysis of the ABS/PP (70/30) nanocomposites with clay, it was observed that most of the clay existed in the ABS matrix because of the good affinity between the ABS and clay which contained benzyl group. From the studies of the scanning electron microscopy (SEM) analysis, the size of the PP droplet decreased with clay from 16.7 to 5.6 μm when the clay was added up to 4.0 phr. When the clay content was increased, the droplet of the dispersed phase (PP) was shown to elongated structure. The elongated structure could be explained by the decrease of the viscosity ratio of the PP and continuous phase (ABS) with clay, which corresponded to the increase of the viscosity of the continuous phase (ABS/clay). From the results of the SEM, TEM, and WAXD analysis, it is suggested that the increase of the viscosity of the continuous phase (ABS/clay) is mainly due to the location of clay in the ABS matrix. POLYM. ENG. SCI., 47:1671–1677, 2007. © 2007 Society of Plastics Engineers</P>