Cho S.R.;Choi S.H.;Kim H.J.;Choe C.Y.;Jin H.J.;Son D.S.
Journal of Embryo Transfer
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v.21
no.2
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pp.163-168
/
2006
The present study was carried out to investigate in vitro development and post-thawed survivability of bovine embryos according to different ovary transport temperatures. Bovine ovaries were collected at a local slaughterhouse and were transported at 4 different temperature categories to laboratory: $7{\sim}10^{\circ}C\;(T1),\;11{\sim}17^{\circ}C\;(T2),\;18{\sim}25^{\circ}C\;(T3)$ and above $26^{\circ}C$ (control group). The cumulus-oocyte-complexes aspirated from ovaries were in vitro matured, fertilized and cultured. The rates of maturation (to metaphase II), cleavage and development to blastocysts were compared among treatment groups. Furthermore, frozen-thawed blastocysts were in vitro cultured to compare the survivability among groups. The maturation rates in the T1, T2 and T3 groups ($60.0{\sim}68.2%$) were significantly lower than that in the control group (81.8%, p<0.05). The cleavage rates in the T1 and T2 groups (52.6 and 54.5%) were significantly lower than that in the control group (83.6%, p<0.05). However, there was no difference in the development rate to blastocysts among all groups ($27.9{\sim}33.0%$, p>0.05). The survivability of frozen-thawed embryos was significantly lower in the T1 group (46.2%) than those in the T2, T3 and control groups ($68.8{\sim}7.13%$, p<0.05). In conclusion, the results suggest that ovary transport temperature at $26^{\circ}C$ may be optimal for the better in vitro development and the survival of frozen-thawed embryos produced in vitro Furthermore, exposure of ovary to temperature below $10^{\circ}C$ during transport may significantly decrease both in vitro development and survivability of frozen-thawed blastocysts.
Kim, Kwang-Hyung;Jeong, Yeo Min;Cho, Youn-Sup;Chung, Uran
Korean Journal of Agricultural and Forest Meteorology
/
v.18
no.1
/
pp.42-54
/
2016
It is highly anticipated that warming temperature resulting from global climate change will affect the phenological pattern of kiwifruit, which has been commercially grown in Korea since the early 1980s. Here, we present the potential impacts of climate change on the variations of flowering day of a gold kiwifruit cultivar, Haegeum, in the Jeonnam Province, Korea. By running six global climate models (GCM), the results from this study emphasize the uncertainty in climate change scenarios. To predict the flowering day of kiwifruit, we obtained three parameters of the 'Chill-day' model for the simulation of Haegeum: $6.3^{\circ}C$ for the base temperature (Tb), 102.5 for chill requirement (Rc), and 575 for heat requirement (Rh). Two separate validations of the resulting 'Chill-day' model were conducted. First, direct comparisons were made between the observed flowering days collected from 25 kiwifruit orchards for two years (2014-15) and the simulated flowering days from the 'Chill-day' model using weather data from four weather stations near the 25 orchards. The estimation error between the observed and simulated flowering days was 5.2 days. Second, the model was simulated using temperature data extracted, for the 25 orchards, from a high-resolution digital temperature map, resulting in the error of 3.4 days. Using the RCP 4.5 and 8.5 climate change scenarios from six GCMs for the period of 2021-40, the future flowering days were simulated with the 'Chill-day' model. The predicted flowering days of Haegeum in Jeonnam were advanced more than 10 days compared to the present ones from multi-model ensemble, while some individual models resulted in quite different magnitudes of impacts, indicating the multi-model ensemble accounts for uncertainty better than individual climate models. In addition, the current flowering period of Haegeum in Jeonnam Province was predicted to expand northward, reaching over Jeonbuk and Chungnam Provinces. This preliminary result will provide a basis for the local impact assessment of climate change as more phenology models are developed for other fruit trees.
Journal of the Korean Society of Food Science and Nutrition
/
v.38
no.4
/
pp.451-461
/
2009
The purpose of this study is to provide fundamental information for snack development contributing to physical growth of children with cerebral palsy. The study was conducted on the children with cerebral palsy of age 1 to 7 by investigating their food behavior, physical growth development, nutritional status, and snack intake. As a result of assessing physical growth by WLI (Weight-Length Index), the proportions of the children with cerebral palsy were the following: underweight 45.5%, normal 45.5%, overweight 6.0%, and obesity 3.0%. The mothers of the children with cerebral palsy mainly bought milk and dairy products for their children's snacks (43.5%) as well as fruits (33.3%). They wanted development of new snacks that helped growth development (50.5%), and preferred more development of the following snacks: Korean rice cakes (47.5%), biscuits (24.2%), bread (22.3%). The result of dietary intake showed that the percentage of RI in zinc and folic acid did not reach the RI in every age categories. The proportion of subjects with less than 75% of RI was 76.8% for the zinc and folic acid, and 52.4% for the calcium and iron. These results indicate that children with cerebral palsy had slower physical development and lesser nutrition intake than normal children. Hence, this study provided the basis to develop the snack for the malnutrition state children with cerebral palsy which helped their physical development. The shape of new snack considered was a rice cake which included zinc and folic acid that were insufficient in RI in children with cerebral palsy.
Park, In Sook;Park, Song Kyoung;Naing, Aung Htay;Hwang, Yoon Jung;Kang, Si-Yong;Lim, Ki Byung
FLOWER RESEARCH JOURNAL
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v.18
no.3
/
pp.165-170
/
2010
This study was carried out to investigate the effect of three different growth retardants for applying pot or bedding plant with 'Rialto', 'Elodie', and 'Raizan'. Ancymidol, uniconazole, and paclobutrazol were applied as a drench at various concentrations. In Oriental hybrid lily 'Rialto', no changes were observed not only plant height but also leaves and flowers in paclobutrazol treatment. But the growth of plant treated with ancymidol was inhibited above 30% compare to control regardless of concentrations. However, numbers of leaf and flower per plant were similar to those of controls. Plant height was similar to nontreated control in $1mg{\cdot}L^{-1}$ uniconazole treatment but that reduced about 30% in drench application of 5 and $10mg{\cdot}L^{-1}$ uniconazole. Asiatic hybrid lily 'Elodie' was not different in growth between application of paclobutrazol and nontreatment as 'Rialto'. While, in all ancymidol treatments, plant height was 50~60% shorter than that of control. Also, numbers of leaves were reduced and days to flowering were slightly delayed in $30mg{\cdot}L^{-1}$ ancymidol treatment as compared with the control. All traits except plant height of $1mg{\cdot}L^{-1}$ uniconazole were similar to control but there were differences of statistical significance between 5, $10mg{\cdot}L^{-1}$ uniconazole drench and nontreated control. Lilium ${\times}$ formolongi 'Raizan' like above two cultivars had no dwarf effect on height in paclobutrazol treatment. In drench application of ancymidol, plant height reduced over 60% than that of control regardless of concentrations. Especially, days to flowering were a little delayed with $30mg{\cdot}L^{-1}$ paclobutrazol treatment. Plant height of $10mg{\cdot}L^{-1}$ uniconazole was about 26% shorter than that of control, but other traits were no differences between uniconazole treatment and control. In result, the drench application of ancymidol and uniconazole was pretty effective for usage as pot lily without great changes of quantitative traits.
Park, C.G.;Lee, M.H.;Yoo, J.K.;Lee, J.O.;Choi, B.R.
Korean journal of applied entomology
/
v.34
no.4
/
pp.360-367
/
1995
The relative toxicity of abamectin was assessed to the predatory mite Amblyseius womersleyi Schicha and to dicofol-resistant and -susceptible twospotted spider mite (TSM) Tetranychus urticae Koch in the laboratory. Abamectin was much les toxic to the predator than to the spider mite. At 0.12 and 0.6 ppm, all TSM adult females of the tow strains were killed within 48 h after dipping n the solutions. The lower concentrations (0.06 and 0.012 ppm) killed more than 77% of TSM female adults of the two strains at 120 h after treatment. However, abmectin did not significantly affect the survival and mobility of A. womersleyi female adults at a concentration of 0.12 ppm but the mortality was slightly increased up to 20~23% at 0.6 and 6 ppm. Abamectin did not significantly affect hatchability of one-day old TSM eggs at 0.06~0.6 ppm. The Four-day old eggs were much more susceptible to abamectin than one-day old eggs were. Within 0.006-6 ppm, abamectin did not affect the hatchability of A. womersleyi eggs and the development of resulting immature predators. When the predator female adults were dipped in 0.6 and 0.12 ppm solution, their reproduction was not affected, but at 6 ppm it was decreased by 35%. However, the reproduction of TSM reduced significantly at concentrations between 0.006 and 0.6 ppm. The differential toxicity of abamectin between TSM and the predator could be of practical importance in managing spider mite populations in the field. Abamectin at selective sublethal concentrations (i.e., 0.012~0.06 ppm) could be of value in adjusting predator/prey ratios in integrated management of spider mites.
The purpose of this study is to know the effects on school lunch service programme of elementary school in rural area, by using the group consisting of the sixth year students in the schools that have provided them with the lunch for six years or longer(male student:312, & female student:324), while using the comparing group consisting of the sixth year students in the schools that have not provided them with the school lunch under their similar living condition(male student: 306 & female student:322). In addition, this study was carried out by examining all continued information about their height and weight shown in the developmetal record for six years from the 1st to 6th year, and by checking their eating habits on the basis of questionnaires. The result of this study is summarized as follows. As the result of comparing the values of their height and weight grown for 6 years, it was shown that the height of the male group provided with school lunch is 27.8 cm while the male group without lunch is 27.1 cm. And the female group provided with school lunch indicated the growing value of 29.9 cm while the group without lunch did 28.4 cm. Then, it appeared that both male and female groups provided with school lunch show higher growing values of 0.7 cm, respectively, and 1.5 cm than these groups without lunch. Also, the weight of the group without lunch was 14.8 kg. Moreover, the weight of the female group provided with school lunch was 16.9 kg while the group without lunch was 17.2 kg. Then, it was shown that the male group provided with school lunch indicates heavier growing value of 0.9 kg than the group without lunch while the female group without lunch does heavier value of 0.3 kg than the group provided with school lunch. It's figure showed that although this distribution according to percentile in the 1st year is similar to the standard regular curve it is positioned in the upper group(more thatn 70%) divided centering around 50% in the 6th year, of which distribution of children provided with school lunch was higher. When comparing the values of physical status in the 6th year, it was also shown that male children with school lunch are better than these children without lunch in jumping, throwing, chinning and lifting while female children are better than these children without lunch only in jumping, which were a significant difference. In addition, the group provided with lunch showed distribution of the higher physical grade. The result of analysis on their breakfast indicated that the children with every morning breakfast account for 67.6% of the group provided with school lunch while the group without lunch for 57.8%. Regarding the reason that they do not have the breakfast, the group with school lunch answered "Because of habits"(50.7%) while the group without lunch did "Because they have no appetite"(58.9%). When comparing the degree of preference for hot or salty food, it was apparent that these children with school lunch generally tend to prefer less hot or sailty food. With respect to the frequency and place of their eating between meals, it was shown that about 70.0% of both groups has the eating between meals, more than one time a day. Then, the group with school lunch had the eating between meals at home(45.2%) while the group without lunch did it in the process of returning to home(48.4%). Regarding the degree of their preference for a certain food, it was shown that more children of the group with school lunch do not prefer a food to others. Also, their eating attitude indicated that such children as eating the food with chat after completely swallowing food and with T.V watching are larger and lower among the group with school lunch, which showed a remarkable defference from the group without lunch. With respect to their sanitary habits such as hand washing and toothing, these children who always wash their hand before eating, accounted for 84.4 % of the group provided with school lunch while the group without lunch did for 63.6%, of which the female group with school lunch indicated a remarkable difference. The actual condition of their nutrition education showed that these children who answered "Received this education" accounted for 78.0% of the group with school lunch while the group without lunch accounted for 57.5%.
Aum, Ji A;Jung, Hee Jin;Huh, Jae Won;Son, Sang Hee
Clinical and Experimental Pediatrics
/
v.50
no.6
/
pp.543-548
/
2007
Purpose : The anthropometric data of newborns published by Lubchenco et al in the 1960's have been most commonly used in Korea as a standard of newborn growth. We hypothesized that Lubchenco's data have limitations for Korean premature infants born in the 2000's. We analyzed and compared the data of birth weight, length, and head circumference. Methods : The medical records of 1,159 premature infants of 26 to 35 weeks of gestational age born at Il-Sin Christian Hospital of Busan from January 2,000 to August 2,006 were reviewed. The anthropometric data from total 1,010 premature infants were analyzed after excluding the data from infants whose gestational age were estimated by other than ultrasonogram, and infants with major congenital anomalies or chromosomal anomaly, born from foreign parent, and extreme outliers. Results : In the birth weights by gestational age, our 90 percentile values were lower than Lubchenco's 90 percentile values for all gestational age studied, particularly for less than 30 weeks the 90 percentile curve was drawn at the area as that of Lubchenco' 75 percentile. And our 10 percentile values were higher than Lubchenco's 10 percentile values for all gestational age studied. In the birth length and head circumference by gestational age, our 90 percentile values were lower than Lubchenco's 90 percentile values for all gestational age studied, and the 90 percentile curve was drawn at the area as that of Lubchenco's 75 percentile. And our 10 percentile values were higher than Lubchenco's 10 percentile values for all gestational age studied. Conclusion : It is unreasonable to apply Lubchenco's data published before 4th decades to present Korean premature infants and have a risk to underestimate intrauterine growth retardation or small for gestational age and large for gestational age. Considering for the possibility of increasing the mortality and morbidity of premature infants due to delayed diagnosis and treatment by these underestimating, our anthropometric data of premature infant is expected to contribute to lower the mortality and morbidity of premature infants.
A scanning electron microscopic study was performed to observe the surface ultrastructures of the third-stage larvae of Gnathostoma hispidun. The early third-stage larvae (EL3) were collected from the viscera of Chinese loaches by the artificial digestion method . The advanced third-stage larvae (AdL3) were recovered from mice experimentally infected with EL3. Both larval worms were fixed with 2.5% glutaraldehyde, dehydrated in graded alcohol. dryad in critical point dryer, and coated with gold. The specimens were observed with a SEM (DS- l30C). On the head bulb of both larval stage, the mouth had a pair of lateral lips of equal size and of half moon shape. Each lip had a couple of labial papillae and a small amphid located between the two papillae. The hooklets on the head bulb had single-pointed tips and curved posteriorly. The cuticular spines of EL3 were larger and more densely distributed in the anterior area (about 1.8 Mm in length) and gradually decreased in size and number posteriorly. The cuticular spines in the anterior area of AdL3 were sharp-pointed and about 4.5 Mm in length, and those in the middle area were about 1.75 Mm. The velvety cuticular folds and dot-like cuticular spines were distributed in the posterior area. A cervical papilla was located between the 7th and 8th transverse striations. A dome-like body papilla was located at the posterior 1/4 of body. An ellipsoidal excretory pore was located between the 17th and 18th striations. From the above results, it is suggested that the characteristic SEM findings obtained from this study may be helpful on the species identification of larval Gncthostomn.
Enlow's counterpart analysis explains the complex with anatomic and developmental characteristics where craniofacial aspect of individuals has been developed. The analysis does not compare individual measurement with the normal value from the average of majority but analyzes by comparison of values that each individual has. This study was to clarify the Korean craniofacial skeletal pattern using Enlow's counterpart analysis considering the fact that the craniofacial skeletal pattern has racial and regional variations. This research will be helpful in the future for growth research and research of the orthognathic surgery. For this study, the samples were consisted of 100 Korean adult subjects(50 males and 50 females) who had normal occlusion and pleasing face. Measurement points and lines were established using Enlow's counterpart analysis and they were statistically evaluated. The results indicated that : 1. The average angle between PCF and PMV was $38.54^{\circ}$ in males and $38.43^{\circ}$ in females, and the average Wits' appraisal was -2.51 in males and -2.3 in females. The ramus alignment(R4) was 1.89 in males and 2.36 in females. 2. It shows that females have a longer ramus than the PCF compared to the males, because there was a significant difference in Ramus/PCF horizontal dimensions (Skeletal A3-B3) between female and male subjects 3. It shows that males have a longer mandibular corpus than the maxilla compared to the females, because there was a significant difference in Maxillary/Mandibular arches(Skeletal A4-B4) between male and female subjects 4. In cranial floor+maxilla/ramus+corpus at A and B points(Al-Bl), which represents difference in total horizontal length between the maxilla and mandible, there was no significant difference between males and females. In conclusions, compared to Caucasian, Korean have more depressed midface, prognathic mandible, and ramus that rotates inferioposterior. Also, we observe that Korean women have target ramus posterior cranial base, as compared with Korean men. Consequently, the total length of maxilla and mandible does not show any difference, because man's mandible is longer than maxilla in comparison with woman's one.
Although there is a severe underlying skeletal deformity, the dentition has often maintained some occlusal contact and interdigitation by the teeth compensating in their positions for the skeletal problem, and these dental compensations are manifested in all three planes of space. The purposes of present investigation were 1) to study the pattern of dentoalveolar compensation of hyperdivergent skeletal pattern , and 2) to compare the dentoalveolar compensations of hyperdivergent skeletal pattern in children with adults. The samples selected for this study were consisted of 60 subjects in normal group, 60 subjects in hyperdivergent group. Each was divided into two subgroups by age ; child groups($8\~12yr$ old) and adult groups(17yr old over). The findings of this study were as follows; 1. In child, hyperdivergent subjects had smaller posterior lower facial height(p<0.01) and slightly longer anterior lower facial height than normal ones. In adults, they still expressed smaller posterior lower facial height and much longer anterior lower facial height than normal ones(p<0.01). 2. Hyperdivergent subjects had larger amount of upper and lower incisor relative eruption to their basal bone length than normal ones(p<0.05). In adult, relative eruption of upper incisor was increasing(p<0.05), although relative eruption of lower incisor remained the same as the child. 3. In child, there was no difference between hyperdivergent group and nomal one in the upper and lower molar relative eruption to their basal bone length. In adult, hyperdivergent group had target amount of upper molar relative eruption than normal ones(p<0.01), but relative eruption of lower molar was similar to normal ones. 4. Hyperdivergent group had larger angle between lower occlusal plane and mandibular plane than normal group(p<0.01). Upper occlusal plane of adult groups rotated more antero-superiorly than child groups, and adult hyperdivergent group had sleeper upper occlusal plane than normal group(p<0.05).
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