The purpose of this study was to assess the genetic variation and establish the relationship amongst breeds and strains using 7 chicken specific microsatellite markers. A total of 317 DNA samples from four Korean native chicken (KNC) strains (KR: Korean Native Red chicken strain, KY: Korean Native Yellow chicken strain, KL: Korean Native Black chicken strain, KO: Ogol chicken strain) and three introduced endemic chicken breeds (LE: Leghorn chicken breed, RI: Rhode Island Red chicken breed, CO: Cornish chicken breed). The size of microsatellite markers was decided using GeneMapper Software (v.4.0) after being analyzed using an ABI 3130 Genetic Analyzer. Frequencies of microsatellites markers were used to estimate heterozygosities and genetic distances. The lowest distance (0.074) was observed between the KY and KL breeds and the highest distance (0.779) between the KL and LE breeds. The KNC strains (KR, KY, KL) have comparatively near genetic distance each other. On the other side, each individual was not ramified to different groups and were spread evenly in phylogenetic dendrogram about all the KNC of each strain populations. But the endemic breed populations (LE, RI, CO) were ramified to different groups. The microsatellite polymorphism data were shown to be useful for assessing the genetic relationship between Korean native strains and other foreign breeds.
Ko Y. M.;Kim D. W.;Kim K. E.;Shin S. C.;You S. J.;Ahn B. K.;Kang C. W.
Korean Journal of Poultry Science
/
v.31
no.4
/
pp.245-253
/
2004
This study was conducted to investigate the effects of dietary yeast culture containing rPST on growth performances and the characteristics of body compositions in broiler chickens. A total of 460 Ross male broiler chicks aged 2-day-old were fed one of five experimental diets; Control(devoid of all), TI (with $0.1\%$ antibiotics; chlorotetracycline), T2 (with $0.1\%$ rPST-yeast culture), T3 (with $0.2\%$ rPST-yeast culture) or T4 (with $0.2\%$ SC yeast culture) for 6 weeks. Feed consumption and body weights were measured weekly. At week 5 of the experiment, 10 chicks were randomly selected and sacrificed. The relative weights of each organ and the chemical composition of edible meat were measured. The enzyme activity, total cholesterol, Ca and P were also determined. Tibial weight, bone strength and chemical composition were investigated. There were no significant differences in feed intake and feed conversion ratios among the treatments throughout the experimental period. Body weight gains tended to be increased by feeding of diets containing rPST-yeast culture. The relative weight of breast muscle in T3 group was significantly higher than that of the control (P<0.05). The moisture contents of breast meat in groups fed diets containing rPST-yeast culture or SC yeast culture were significantly increased as compared with those of the control and n. However, the contents of crude protein and ether extract were not affected by feeding of rPST-yeast culture. There were no significant differences in GOT, total cholesterol, Ca and P. The relative weight and strength and proximal composition of the tibia were also not affected by dietary treatments. These results indicated that dietary rPST-yeast culture may be a valuable alternative for optimizing growth performances, particularly for improving the yield of breast muscle.
Journal of The Korean Society of Grassland and Forage Science
/
v.19
no.2
/
pp.159-166
/
1999
This study was conducted to investigate the effects of application of the dolomite particle and the shell powder on soil characteristics, dry matter yield and nutritive value of forages in loam soil at the experimental field of National Livestock Research Institute, Suwon, from 1994 to 1996. Application treatments were control, lime, dolomite 0.5, 2.0, 4.0mm, and shell powder in mixed pasture. Rate of dust occurrence was greatly decreased according to dolomite application and the dissolving rate in soil was highest in shell powder application among treatments. Although there was no significant difference, average dry matter yield of forages for 3 years was slightly increased with the application of lime, shell powder, dolomite 0.5mm, 4.0mm, 2.0mm and control in order. Both Ca and Mg contents of forages were no differences among treatments in 1994. However, all treatments were higher than those of control in 1995. And K and Na contents of forages were no differences among treatments. Lime requirement was greatly increased from 2,630 to 6,150kg per ha with the lapse of time. Although soil hardness was optimum level at first, it was likely to become hard little by little after treatments. Solid phase of soil was lowered a little except for control. Organic matter and available $P_2O_5$ contents of soil were highest in shell powder application among treatments, and K, Ca and Mg contents of soil were no differences among treatments. Ca content was increased a little in 1995, but decreased a little in 1996 compared to that of soil before treatments in 1994. AIso, Mg content was lowered than that of soil before experiment in 1995 and 1996. The results demonstrated that use of dolomite and shell powder as lime substitutes could be reduced dust problem and coast pollution as well as soil improvement. Therefore, it is desirable to apply the dolomite and the shell powder every 3 years in loam soil.
Lipie peroxide formation, antiperoxidative s system and body adaptability for handling lipid p peroxide were examined in the first and second g generations of rats fed fish oil. Mackerel oil(MO) was used and four other dietary oils and fat, i.e. soybean oil(SO), perilla oil(PO), rapeseed oil(RO) and beef tallow(BT) were also employed to compare the effect of fish oil. Synthetic diets containing these five dietary fats at the level of 1O%(w/w), were given to the correspondm ing groups of male and female rats weighing about 70 grams. After 34 days of feeding, male a and female rats were mated and their offsprings were raised throughout suckling (17, 26 days) and weanling (39 days) periods. Liver lipid perox xide level was highest in MO group of both first (mother rats after lactation) and second generat tions of 17 and 26 days old, but not of 39 days old. During suckling period, liver lipid peroxide level was well matched to total unsaturation of dietary fat. Brain lipid peroxide levels were not different among five groups. Liver $alpha$-tocopherol a and reduced glutathione (GSH) levels were lowest in MO fed first generation. In second generation, $alpha$-tocopherol level was also low in MO group, although the effect was less pronounc ced, but GSH level was not different from other groups. Oxidized glutathione (GSSG) level did not consistently vary by change in dietary fat. Glutathione peroxidase activity increased as young rats grew up to 39 days. Superoxide d dismutase activity change was insignificant by a age, but was shown as lowest in MO group. At the age of 26 and 39 days, liver glutatione peroxidase activity was increased as was level of lipid peroxide, suggesting that this is the one of the mechanisms responsible for body adaptab bility for protection against the accumulation of lipid peroxide.
In dieser Arbeit ist zum ersten allgemeiner $\ddot{U}$berblick auf die Verschuldensprinzip, das grunds$\ddot{a}$tzlich f$\ddot{u}$r die Unfalls-Haftung im Bereich der medizinischen Behandlungsfehler noch immerhin gelten, in aller K$\ddot{u}$rze angef$\ddot{u}$hrt und zugleich in rechtsvergleichender Weise auf die sozialrechtliche Typenentwicklung in Bezug auf die haftungsrechtlich motivierte Entsch$\ddot{a}$digung. Gem$\ddot{a}{\ss}$ dem ${\S}$ 46 Gesetzes zur Abhilfe f$\ddot{u}$r medizinische Besch$\ddot{a}$digungenund auf die Mediation-Schlichtung f$\ddot{u}$r medizinische Streitigkeiten ist die rechtssystematische Bedeutung des Kompensations-Zusicherungsgeschafts als eine Art institutioneller Fremdversorgung zu erfassen. Demzufolge geht es h$\ddot{a}$uptsachlich um die Problematik von tatbest$\ddot{a}$ndlichen Merkmalen der Kompensation im ${\S}$ 46 obigen Gesetzes (unten 1) und im Bezug auf die im voraus von GF-Ministerium bekanntgegebene AO (provisorische Fassung) von 8. 11. 2011. um die Analyse einer Reihe von KHG-Entscheidungen $\ddot{u}$ber $\ddot{a}$rztliche Geburtsbehandlungsfehler (unten 2). Dabei ist noch die Geltungsbereich mit entsprechendem Kompensationssystem in Japan zu vergleichen (unten 3). 1. Der terminologische Sinn von "h$\ddot{o}$here Gewalt" ist sowohl semantisch wie auch juristisch-rechtstechnisch eine negative Vorausaussetzung f$\ddot{u}$r haftbar machende Gef$\ddot{a}$hrdungstatbestand. Nicht nur im Inhalt und Umfang vertr$\ddot{a}$gt dieser Rechtsbegriff sich nicht mit dem anderen tatbest$\ddot{a}$ndlich parallell zu erf$\ddot{u}$llenden Merkmal, also "die Besch$\ddot{a}$digung aus unverschuldeter $\ddot{a}$rztlicher Geburtsvorsorge", weil die jene enger als die diese auf dem Begriffsfeld ist, sondern auch im dogmengeschichtlichen, auch doch rechtstechnichen Sinne ist die Terminologie von "h$\ddot{o}$here Gewalt" ungeeignet, f$\ddot{u}$r den kompensatorischen Tatbetand als ein positives Merkmal, zu sein, statt derer, m. E. sollte der Begriff von "unkontrollierbarer Zuf$\ddot{a}$lligkeit" als L$\ddot{o}$sungsansatz verwendet werden. Dazu ist auch die ratio legis zur institutionellen Einf$\ddot{u}$hrung des obigen Kompensations-Zusicherungsgesch$\ddot{a}$fts, das sich auf die Entsch$\ddot{a}$digung des f$\ddot{u}$r Patienten unertr$\ddot{a}$glichen Verlustes gerichtet, d. h. gerade die Augabe des nachteilsausgleichenden Einstehens f$\ddot{u}$r Ungl$\ddot{u}$ck, nicht f$\ddot{u}$r Unrecht, zu ber$\ddot{u}$cksichtigen. 2. Die Typen der KHG-Entscheidungsf$\ddot{a}$llen im Bereich von Gyn$\ddot{u}$kologie k$\ddot{o}$nnten diagnostisch bzw. therapeutisch im folgenden differenziert sein werden; je nach der Kriterien von der Weise und dem Zeitpunkt zur Geburtshilfe, technischen Behandlungsfehlern beim Geburtsvorgang, und Besorgungsfehlern nach dem Geburt u. dgl. 3. Die japanische verschuldensunabh$\ddot{a}$ngige Kompensation ist eigentlich eine Art institutionelle Vorsorge, die anders als koreanische Versorgungssystem auf Grund privatsicherungsfinaler Vorleistung gew$\ddot{a}$rleistet wird. Der kompensatorische Bereich beschr$\ddot{a}$nkt sich auf die schwere infantile Zerebralparese (Cerebralparese) beim medizinischen Geburtsbehandlung. Schlie${\ss}$lich w$\ddot{u}$rde diese Arbeit erw$\ddot{u}$nscht sein, zur Konkretisierung des Voraussetzungen f$\ddot{u}$r die Kompensation nach ${\S}$ 46 Abs. 1 u. 4 des obigen Gesetzes beitragen zu k$\ddot{o}$nnen, welcher spatestens am 8. 4. 2013. zur Geltung gebracht sein sollte.
Telomeres are essential for chromosome stability and are related with cell senescence, apoptosis and cancer. Even though telomere length and telomerase activity have been studied extensively, very little is known to analyze the telomere dynamics in chicken cells. This study was carried out to analyze the telomere distribution and telomerase activity of Korean Native Chicken cells along with aging. The cells were collected from brain, heart, liver, kidney and germinal tissues during physiological stages. Telomere distribution was analyzed by Quantitative-Fluorescence in situ Hybridization (Q-FISH) techniques using the chicken telomeric DNA probe. Telomerase activity was performed by Telomeric Repeat Amplification Protocol (TRAP) assay. In results, the telomeres of chicken were found at the ends of all chromosomes with the interstitial telomeres on chromosomes 1, 2 and 3. The amount of telomeres on chicken cells was decreased along with aging in most tissues. Furthermore, the telomere quantity was significantly different among tissues. The relative amount of telomeres in proliferous cells such as testis cells had much more than those of liver, brain, heart, blood and kidney cells. The telomerase activity was down-regulated in cells of brain, heart and liver tissues. Whereas gonadal cells showed a constitutive activity of telomerase during all stage of life. In conclusions, the telomere quantity and telomerase activity in chicken are closely relate to cell proliferation and tissue specificity during developmental stages and aging. There is also closely correlated between the amounts of telomeric DNA and telomerase activity in chicken tissues.
The insect Diplosis mori Yokoyama is causing extensive destruction of mulberry trees in Korea with a resultant loss in silk production. This study was made to determine an effective method of control. Methods and Materials Used Preliminary studies were made to determine more exactly the life cycle of the insect. Based on this information, various control measures were tested, including the use of spray methods with BHC and control of larvae by tilling. Results Obtained 1. Life cycle studies (a) In the Suwon area, this-insect has 5 generations per year. The first starts in the later part of June and the final cycle ends in the later part of September. (b) The adult insects appear about 7: 00-8: 00 P.M. and live for 2-5 days. Females live in longer periods than the male. (c) Larvae lives inside the second and third stipules (A. B.) before mulberry leaf development. They cause extensive damage to the leaves at the point where they are attached to the stem. (d) Weather conditions considerably affect the life cycle. The pupa particularly are affected and not be able to change into the moth stage when there is a long period of no rain. (e) Larvae are large......0.3 to 2.0mm......and are milky-white immediately after hatching but turn to pinkish as the worm matures. The matured worm has a jumping ability up to 15-20cm. The worm burrows into the ground 1.5 to 3.0 cm before changing into the pupal stage. (f) The pupal stage usually lasts 7-8 days, in summer weather conditions and the pupa is surrounded with a coarse cocoon. (g) These insects, as a general rule, overwinter as pupae but sometimes as larvae. 2. Control measures (a) BHC dust applied on the ground seem most effective. It should be done 4-5 days after the worm has burrowed into the ground. For this control, it is recommended that 6kg of a 2% formation Tanbo(l0ares) be used. (b) For the effective spraying against the fly, it is recommended that a formulation of liquid BHC spray terials be used at the rate of 400-600 liters per Tanbo. (c) Tillage methods which provide a cover of soil 5cm or more in depth above infested areas will effect-maively prevent the emergence of the fly from the pupal stage. 3. Conclusions Methods of control against Diplosis mori Yokoyama can be tied more closely to the life cycle of the insect with more effective results. Further studies are needed to complete information on possible controls during or after hibernation. Economic studies on the cost of these control measures are also needed.
Hwangbo J.;Hong E. C.;Nho W. G.;Lee B. S.;Bae H. D.;Choi N. J.;Chung J. Y.;Kang H. K.;Jang A. R.;Park B. S.
Korean Journal of Poultry Science
/
v.32
no.3
/
pp.195-202
/
2005
Two experiments were conducted to evaluate the effects of dietary salt levels on the performance in laying hens and broilers. In experiment 1, 108 Avian broilers of 21 days age were conducted to evaluate broiler's performance. The broilers were divided into 6 treatment groups with 6 pens (3 broilers/pen), and 134 diets with different levels of salt with 0.25 (control), 0.5, 1.0, 1.5, 2.0 and $2.5\%$, respectively, for 3 weeks $(3\~5 weeks)$. The feed intake was not affected by the treatments. However, moisture content in feces was increased as increasing levels of dietary salt (P<0.05). In experiment 2, 135 ISA Brown laying hens were used to evaluate on performance of laying hens. The dietary supplementation of salt levels were prepared at 0.25 (control), 1, 2, 3 and $4\%$, respectively, for 4 weeks. Feed intake was decreased as increasing the dietary salt levels during the experiment (P<0.05). Particularly, it was lower in $3\%\;and\;4\%$ salt level treatments compared with the control (P<0.05). As expected, water intake was increased as increasing the dietary salt levels (P<0.05). Therefore, the present results could indicate that dietary salt content need to be considered for broilers and laying hens.
Indium Tin Oxide (ITO) thin films were prepared by RF magnetron sputtering with different flow rates of $O_2$ gas from 0 to 12 sccm. Electrical and optical properties of these films were characterized and analyzed. ITO deposited on soda lime glass and RF power was 2 kW, frequency was 13.56 MHz, and working pressure was $1.0{\times}10^{-3}$ Torr, Ar gas was fixed at 1,000 sccm. The transmittance was measured at 300~1,100 nm ranges by using Photovoltaic analysis system. Electrical properties were measured by Hall measurement system. ITO thin films surface were measured by Scanning electron microscope. Atomic force microscope surface roughness scan for ITO thin films. ITO thin films secondary electron emission coefficient(${\gamma}$) was measured by ${\gamma}$-Focused ion beam. The resistivity is about $2.4{\times}10^{-4}{\Omega}{\cdot}cm$ and the weighted average transmittance is about 84.93% at 3 sccm oxygen flow rate. Also, we investigated Work-function of ITO thin films by using Auger neutralization mechanism according to secondary electron emission coefficient(${\gamma}$) values. We confirmed secondary electron emission peak at 3 sccm oxygen flow rate.
Kim, Seon-Gu;Kim, Chang-Guhn;Lee, Kang-Mo;Kim, Hye-Won;Min Byung-Cheol;Choi, See-Sung;Lee, Jong-Deuk;Yang, David J.;Kim, E. Edmund;Lee, Hyun-Chul;Won Jong-Jin
The Korean Journal of Nuclear Medicine
/
v.32
no.4
/
pp.374-381
/
1998
Purpose: I-131 labeled (2'-deoxy-2'-iodo-${\beta}$-D-arabinofuranosyl) adenine (IAD) may be involved in DNA synthesis during active proliferation of tumor cells. We conducted this study to find out the biodistribution of IAD and it's feasibility for scintigraphic tumor imaging. Materials and Methods: Tosyl acetyl-adenosine was dissolved in acetonitrile, and I-131-NaI was added and heated to synthesize IAD. Female Fisher 344 rats innoculated with breast tumor cells were injected with 0.27 MBq of IAD. Rats were sacrificed at 0.5, 1, 2, 4, 24h and the % of injected dose per gram of tissue (%ID/g) was determined. For scintigraphy, rats bearing breast cancer were administered with 1.11 MBq of IAD and imaging was performed after 2 and 24h. Then, rat body was fixed and microtomized slice was placed on radiographic film for autoradiography. Results: %ID/g of tumor was 0.74 (0.5h),0.73 (1h), 0.55 (2h), 0.38 (4h), and 0.05 (24h), respectively. At 1h after injection, %ID/g of tumor was higher than that of heart (0.34), liver (0.42), spleen (0.47), kidney (0.69), muscle (0.14), bone (0.33) and intestine (0.51). However, %ID/g of tumor was lower than blood (1.06), lung (0.77), and thyroid (177.71). At 4h, %ID/g of tumor in comparison with other tissue did not change. Tumor contrast expressed by tumor to blood ratio was 0.69 and tumor to muscle ratio was 5.11 at 1h. However, these ratios did not improve through 24h. On autoradiogram and scintigraphy at 2 and 24 hour, the tumor was well visualized. Conclusion: This results suggest that IAD may have a potential for tumor scintigraphy. However, further work is needed to improve localization in tumor tissue.
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