• Korean Journal of Agricultural Science
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• v.14 no.1
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• pp.51-60
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• 1987

The study was conducted to estimate the heritabilities, genetic and phenotypic correlations on preweaning body weight and postweaning traits. The data analysis were the record of 253 male pigs produced from 54 boars of Landrace, Hampshire, Large Yorkshire and Duroc purebreds raised at National Animal Breeding Institute from 1978 to 1983. The results obtained in this study are summarized as follows. 1. The heritabilities of body weight at birth, 21days and 56days were $0.233{\pm}0.160$, $0.485{\pm}0.185$ and $0.758{\pm}0.214$, respectively, and the heritabilities estimated on postweaning traits were $0.270{\pm}0.164$ for average daily gain, $0.350{\pm}0.174$ for feed requirement, $0.272{\pm}0.165$ for backfat thickness, $0.887{\pm}0.221$ for days to 90Kg and $0.565{\pm}0.195$ for selection index. 2. Genetic correlations of body weight at birth with 21 days and 56 days were 0.349 and 0.19& and body weight at 21 days with 56 days was 0.907, and daily gain with feed requirement, backfat thickness, days to 90 Kg and selection index were -0.552, 0.107, -0.903 and 0.716, and feed requirement with backfat thickness, days to 90Kg and selection index were -0.058, 0.699 and -0.942, and backfat thickness with days to 90 Kg and selection index were -0.237 and -0.025, respectively. 3. Phenotypic correlations of body weight at birth with 21 days and 56 days were 0.342 and 0.287, and body weight at 21 days with 56 days was 0.893 and daily gain with feed requirement, backfat thickness, days to 90Kg and selection index were -0.062, 0.093, -0.651 and 0.540, and feed requirement with backfat thickness, days to 90Kg and selection index were 0.105, 0.601 and -0.613, and backfat thickness with days to 90Kg and selection index were -0.040, -0.416, respectively.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.44 no.2
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• pp.159-162
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• 1999

This study was carried out to determine the optimum harvest date of unshelled immature peanuts and dried kernels from 60 to 120 days after flowering. Fresh pod yield of spanish-type variety, 'Shaedl-tangkong(SD)' reached a peak of 9,140kg/ ha at 70 (days after flowering(Aug. 13) while that of virginia-type variety, 'Daepoongtangkong(DP)' reached a peak of 8,820kg/ha at 90 days(Sept. 11) after flowering. SD and DP showed maximum fresh kernel yield of 6,090 and 6,470kg/ha at 90 days after flowering (Sept. 11), respectively, while dry kernel yield reached a peak of 3,300 and 3,720kg/ha at 110 days(Oct. 1), respectively. Oil content of SD and DP were the highest at 90 days and 100 days after flowering, respectively and the oil content of two varieties increased rapidly from 60 to 90 days. Tannin content of the seed hull of SD increased continuously until 110 days after flowering while that of DP maximized at 100 days. The tannin content of the two varieties increased rapidly from 60 to 100 days. Total sugar of SD and DP showed highest content at 60 days and 70 days after flowering, respectively and suger content decreased very rapidly until 80 days and after that sugar content kept nearly constant. Oil, tannin and total sugar content of spanish-type SD were higher than those of virginia-type DP.

• Journal of Animal Science and Technology
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• v.49 no.2
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• pp.195-202
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• 2007

The growth traits in swine are economically important, which are measured by gain in weight during test period or by age of days to certain weight. However, the difference in growth rate due to individual performance and also other factors occurs. The more reasonable estimation of the measurements of these traits provides the less error in genetic evaluation of pigs. The data from 1,576 heads being weighed periodically of Gyungnam-heugdon(Berkshire) were analyzed to estimate the growth curve which is used to decide average daily gain and days to 90kg. It may not be possible to directly compare accuracy between the conventional methods and the alternative methods. However, the alternative methods by growth curve would be superior to the conventional methods not only in theoretical background, but also in acceptability for diverse factors such as breed, sex and age. The theoretical superiority of the alternative methods comes from estimation at same age in daily gain and calculation of additional days from measuring date to days to 90kg by growth curve of individual. Also this can be easily adopted in a computer system according to breed and sex.

• Journal of fish pathology
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• v.6 no.2
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• pp.163-175
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• 1993

1. By feeding on high Peroxidation Value(POV : 90.4mEq/kg) diets for 180 days, the cultured flounder were induced ceroidosis antificially. 2. The supplementation of glutathione to the diets having POV of 15.5mEq/kg improved the growth of the flounder that had shown depressed by the previous high POV diets(90.4mEq/kg). However, we found very much the same degree of improvement on growth by the supplemented diets of glutathione from 10mg/kg/day to 40mg/kg/day. 3. After 7 days, the flounder fed on the diets supplemented with 10, 30mg/kg/day glufthione start the recover from the accumulated ceroid and damaged tissues. These treated flounders with glutathione showed completely normal histlogical signo after 21 days. The effect of glutathione treatment with high concentration(30mg/kg/day) was better than that of low concentration(10mg/kg/day).

• Journal of Bio-Environment Control
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• v.10 no.4
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• pp.219-224
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• 2001

This experiment was conducted to evaluate net mineralization and nitrification in rain shelter soil incorporated with wine sludge. Net mineralization and nitrification rates varied among treatments during pepper growing periods. In general, net mineralization increased up to 90 days after transplanting before its decrease during the rest growing periods. Maximum net mineralization and nitrification in upper 0-15 cm layer soil were observed in T4 at 90 days after transplanting. The greatest amount of mineralization in upper layer soil was 272.5 mg.kg$^{-1}$ at 30 days in the control and 843.3 mg.kg$^{-1}$ at 90 days after transplanting in T4. Overall, both net mineralization and net nitrification were greater in the upper layer soil than in the lower 15-30 cm layer soil.

• Horticultural Science & Technology
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• v.32 no.3
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• pp.289-295
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• 2014

This research was conducted to investigate a difference in quality according to control of fruit load and cluster weight when seeded 'Heukboseok' grape was grown in a conventional cultivation system. Clusters per vine were set to harvest 1,500 kg, 1,800 kg, and 2,200 kg grapes per $990m^2$. In p lots t reated t o produce 1,800 kg grapes, clusters were set to 3 grades produce grapes with 350 g, 500 g, and 700 g in cluster weight. Based on color chart (National Institute of Horticultural & Herbal Science, Rural Development Admnistration) which show maturation stage for 'Kyoho' grape, grapes with higher than grade 9 were harvested at 80 and 90 days after full bloom, and the r est of them were harvested a t 100 days after full bloom. The final yield of 'Heukboseok' grape was the lowest in target yield of 1,800 kg with 700 g clusters with 75.5% of target yield, but 92.1%-100.1% of target yield were harvested in other treatments. Among treatments with several fruit setting, 83.3% of grapes harvested in treatment to produce 1,500 kg grapes as a target yield at 90 days after full bloom. Among the treatments with different cluster weights, 93.5% grapes were harvested in the treatment with 350 g in cluster weight. 'Heukboseok' grape showed rapid maturation pattern with no significant difference in either soluble solids content or acidity between 90 days from 80 days after full bloom. Therefore, to prevent flesh softening, it is appropriate to harvest fruit at 90 days after full blooms, and both yield and cluster weight were important factors influencing the quality of the fruits in 'Heukboseok' grape. It is confirmed that coloring and firmness was influenced by the final yield and weight per cluster, respectively. Therefore, the yield should be set as grape of 1,500 kg per $990m^2$ in target yield, and cluster weight should be adjusted to 350 g to produce grape of 1,800 kg with the fruits of high quality. It is considered to be hard to produce grape of high quality with 700 g in cluster weight in 'Heukboseok' grape.

• Journal of Veterinary Clinics
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• v.19 no.4
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• pp.391-396
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• 2002

cows, in order to suggest a means for the improvement of milk production. A total of 30 Holstein cows (3rd to 5th of parity) were used and assigned to two groups according This study investigated blood biochemical values between high and low yielding dairy to milk production levels at 15, 30, 60 and 90 days postpartum. Milk production of group A was less than an average of 27 kg/day and that of group B was an average of 30 kg/day. Blood samples were collected by jugular venipuncture from each cow six times at 15 days before the anticipated calving date, within 12 hours postpartum (0 days) and at 15, 30, 60 and 90 days after calving. In serum mineral concentrations, group B was consistently higher than group A in both Mg and Ca. Inorganic phosphorus concentrations showed a little fluctuation between the groups at antepartum and at postpartum, but group B was significantly higher than group A at 15 and 30 days after calving (p < 0.05). In serum biochemical values cholesterol concentrations were consistently higher in group B except at 0 days. BUN and glucose concentrations did not differ between the groups. The concentration of vitamin A of group B was significantly higher than group A at 15 days before the anticipated calving date and at 15 days postpartum (p < 0.01), but at 30, 60 and 90 days postpartum vitamin A concentration of both groups were similar. Vitamin E concentration did not differ between the groups during the experimental period. Results of this study suggest that raising the levels of Mg, Ca, Pi and vitamin A in serum would be effective in increasing milk production of low producing cows.

• Food Science and Preservation
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• v.20 no.3
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• pp.429-434
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• 2013

This study was designed to investigate the formation of ethyl carbamate (EC) during the ripening of Maesil with sugar and Soju (19.5~35% alcohol contents) using a homemade method. Maesil, sugar and Soju were purchased at ordinary market in June of 2012. The preparation of sample for analysis was conducted by method of Henry et al. The analysis of GC/MS was used SIM mode (m/z 89, 74, 62). Quantification was performed in terms of the 62 ion and was based on an internal standard procedure. Good linearity was obtained with a regression coefficient ($r^2$ = 0.993). Low detection limits (LOD) was achieved 4.31 ug/kg and recovery for alcohol was 74.8%. During 90 days, fermentation with sugar was not detected EC (under LOQ). 15 days ripened Maesil wine contained EC between non detected~32.7 ug/kg and 90 days ripened Maesil wine was 19.7~87.4 ug/kg. Higher proportion of Maesil and Soju increased EC contents. EC levels were increased 32.7 ug/kg to 87.4 ug/kg in the ratio of Maesil to 35% alcohol-Soju (1:1). In the ratio of Maesil to 35% alcohol-Soju (1:3) was increased non detected to 69.7 ug/kg. After 90 days, Maesil wine was filtered Maesil through a seive and ripened by 180 days to investigate the formation of EC compared with non filtered. Treatment of filtered, EC contents was much higher level compared with non filtered. Therefore, this result showed that alcohol contents contribute to increase EC formation more than Maesil.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.3
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• pp.305-308
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• 2004

The purpose of this study was to estimate the genetic parameters for backfat thickness at shoulder, mid back and loin and days to 90 kg using a derivative-free REML procedure. Data were collected from 6,146 boars and gilts of purebred Durocs, Landraces and Large Whites performance tested at breeding farms of National Agricultural Cooperatives Federation in Korea from 1998 to 2001. Estimated heritability for backfat measurements at shoulder, mid-back and loin and an average of those backfat measurements were 0.14, 0.32, 0.22 and 0.25 in Durocs, 0.34, 0.50, 0.42 and 0.46 in Landraces and 0.33, 0.52, 0.43 and 0.49 in Large Whites. Heritabilities of backfat measurements estimated were hightest in mid-back and lowest at shoulder. Phenotypic variances of backfat measurements estimated were largest at shoulder and smallest at mid-back. Estimated heritabilities for days to 90 kg were 0.37 in Durocs, 0.42 in Landraces and 0.54 in Large Whites. Genetic correlations among backfat measurements at shoulder, mid-back and loin and an average of those backfat measurements estimated were positive and very high. Genetic correlations of days to 90 kg with the backfat measurements estimated were _0.19 ~ _0.30 in Durocs, _0.04 ~ _0.17 in Landraces and _0.10 ~ _0.13 in Large Whites.

• The Korean Journal of Food And Nutrition
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• v.15 no.3
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• pp.267-271
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• 2002

We have studies in 38 subjects (19 control and 19 experiment) for development of functional food for postpartum body control. Mean age of control and experimental subjects were each other 30.4 and 29.0 years old, and mean body mass index were 20.2 and 21.4. Total weight gain during pregnancy of control and experimental subjects were 14.0kg and 19.8kg. We measured change of weight and liver activity after parturition for 3 months. It shows that weight not reduced until 30 days in postpartum but significantly decreased during 30 days to 90 days. The mean weight of control and experimental subjects were decreased 3.15kg and 6.46kg at 60 days(p<0.05), 4.47kg and 7.44kg at 90 days(p<0.05). In this study, hemoglobin, GOT and CPT level were not changes before and after of experiment, respectively.