The effects of noncrystalline calcium phosphate glass on the healing of 1-wall intrabony defects in beagle dogs

백동훈,황성준,김창성,이용근,조규성,채중규,김종관,최성호,Baik, Dong-Hoon,Hwang, Sung-Joon,Kim, Chang-Sung,Lee, Yong-Keun,Cho, Kyoo-Sung,Chai, Jung-Kiu,Kim, Chong-Kwan,Choi, Seong-Ho The Korean Academy of Periodontoloy 2004 Journal of Periodontal & Implant Science Vol.34 No.1

연구목적 : 이번 실험의 목적은 외과적으로 형성된 성견의 1면 골내낭에 새롭게 제조된, Ca/P 비율이 0.6인 비결정성 calcium phosphate를 적용하였을 때 치주조직의 재생에 미치는 영향을 평가하는 것이다. 연구방법 : 6마리 성견의 양측 하악 제2소구치의 원심면, 제4소구치의 근섬면에 외과적으로 1면 골내낭을 형성하여 치은박리소파술을 시행한 부위를 대조군으로, calcium phosphate만을 이식한 부위를 실험 1군, calcium phosphate와 GTR을 동반한 부위를 실험 2군으로 설정하고 실험하여 술 후 8주에 치유결과를 조직학적으로 관찰하였다. 결론 : 1. 접합상피의 치근단 이동은 대조군에서 결손부 깊이의 30.90 ${\pm}$ 9.92%, 실험 1군에서 결손부 깊이의 24.08 ${\pm}$ 9.12%, 실험 2군에서 결손부 깊이의 38.68 ${\pm}$ 12.22%로 나타났으며 대조군과 실험 1,2군간에 통계적 유의차는 없었다. 2. 결합조직 유착은 대조군에서 결손부 깊이의 36.38 ${\pm}$ 9.03%, 실험 1군에서 결손부 깊이의 26.96 ${\pm}$ 4.24%, 실험 2군에서 결손부 깊이의 27.87 ${\pm}$ 9.70%로 나타났으며 대조군과 실험 1,2군간에 통계적 유의차는 없었다. 3. 신생백악질 형성은 대조군에서 결손부 깊이의 32.92 ${\pm}$ 10.51%, 실험 1군에서 결손부 깊이의 49.16 ${\pm}$ 12.70%, 실험 2군에서 결손부 깊이의 39.62 ${\pm}$ 12.14%로 나타났으며 대조군과 실험 1군간에 통계적 유의차가 있었다. 4. 신생골 형성은 대조군에서 결손부 깊이의 27.24 ${\pm}$ 7.49%, 실험 1군에서 결손부 깊이의 43.51 ${\pm}$ 13.34%, 실험 2군에서 결손부 깊이의 36.47 ${\pm}$ 15.11%로 나타났으며 대조군과 실험 1, 2군간에 통계적 유의차는 없었다. 이상의 결과에서 볼 때, calcium phosphate glasses는 신생골 형성에는 통계적으로 유의차는 없었지만 상당히 증가된 양상을 보였고 신생백악질 형성에는 크게 기여함을 알수 있었다.

치은 염증 상태에 따른 치주낭 측정 깊이와 방사선학적 측정 깊이, 외과적 측정 깊이의 비교 연구

백동훈,채중규,조규성,김종관,Baik, Dong-Hoon,Chai, Jung-Kiu,Cho, Kyoo-Sung,Kim, Chong-Kwan 대한치주과학회 1994 Journal of Periodontal & Implant Science Vol.24 No.2

The purpose of this study was to evaluate relationship of probing attachment levels, radiographic measurements and surgical measurements according to gingival inflammatory condition. Patients with incipient to moderate periodontitis were selected. Upper and lower premolar and molar teeth excluding third molars were measured. At first visit, gingival index and bleeding on probing were taken, and subjects were grouped into 4 categories as follows : Experimental group I : gingival index 1 and no bleeding on probing. Experimental group II : gingival index 2 and no bleeding on probing absent. Experimental group III : gingival index 1 and bleeding on probing present. Experimental group IV : gingival index 2 and bleeding on probing present. Probing attachment levels were measured with manual probe on mesial and distal surfaces from cementoenamel junctions to terminal ends of probe. Radiographic measurements were made to assess bone loss by measuring the distance from cementoenamel junction to the alveolar crest. After thorough scating, a flap was raised exposing the alveolar bone and surgical measurements were made from cementoenamel junction to alveolar bone. The results were as follows: 1. Differences between probing attachment level and radiographic measurements showed $1.01{\pm}0.73mm$ for experimental group I, $0.98{\pm}0.48mm$ for experimental group II, $0.59{\pm}0.66mm$ for experimental group III, $0.98{\pm}0.38mm$ for experimental group IV and with no significant difference between groups. 2. Differences between probing attachment level and surgical measurements showed $1.36{\pm}0.80mm$ for experimental group I, $1.47{\pm}0.54mm$ for experimental group II, $1.06{\pm}0.39mm$ for experimental group III, $1.41{\pm}0.40mm$ for experimental group IV and with no significant difference between groups. 3. Differences between surgical and radiographic measurements showed $0.36{\pm}0.48mm$ for experimental group I, $0.51{\pm}0.54mm$ for experimental group II, $0.57{\pm}0.72mm$ for experimental group III, $0.41{\pm}0.49mm$ for experimental group IV and with significant difference between experimental group I and experimental group II, III, IV(P<0.05).

지붕자동개폐식 축사 및 톱밥우상이 한우의 생산성 및 생력사양관리에 미치는 영향

백동훈(Dong Hoon Baik),최호성(Ho Sung Choi),송주엽(Joo Youb Song),최금홍(Keum Hong Choi),태광섭(Kwang Sub Tae) 전북대학교 농업과학기술연구소 1996 농업생명과학연구 Vol.27 No.-

N/A

계란의 내용물과 난각의 특성에 관한 연구

최진호,강원준,백동훈,박홍석 ( Jin Ho Choi,Won Joon Kang,Dong Hoon Baik,Hong Suk Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6

A total of 999 eggs, randomly collected from a flock of 2,000 hens of White Shaver strain that had been in production for seven months was tested to investigate interrelationships between egg weight and weight of each fraction of egg and between egg weight and shell quality. Egg weight, weights of yolk, albumen and shell, specific gravity of egg and sheaf thickness were measured for each egg. Percentages of fraction weights out of egg weight were calculated and designated respectively as % yolk, % albumen and % shell. Correlations were also investigated among four parameters involved in shell quality. Following results were obtained. 1. Mean (±SD) weight of total eggs tested was 58.72±4.80 g. and mean weights of fractions were 17.08 g. for the yolk, 35.22 g. for the albumen and 5.21 g. for the shell which were equivalent to approximately 30, 60 and 9% respectively of egg weight. 2. Correlation coefficients of egg weight were 0.89 with albumen weight, 0.54 with yolk weight and 0.53 with shell weight, indicating that variation in egg weight was mainly due to variation in albumen weight and egg weight was less influenced by yolk and shell weights. 3. As egg weight decreased weights of all three fractions also decreased. However, the pace of changing was much greater in albumen weight than in yolk weight, resulting in that % yolk increased as egg weight decreased. 4. There were found positive correlations between egg weight and both shell thickness and egg specific gravity, indicating that as egg size decreased shell quality decreased. 5. High correlation coefficients were observed between any pair of four parameters of shell quality measured, which were shell weight, % shell, shell thickness and egg specific gravity.

면양의 산모량 (産毛量)에 영향을 미치는 요인

신원집(Won Jib Shin),백동훈(Dong Hoon Baik) 전북대학교 농업과학기술연구소 1984 농업생명과학연구 Vol.15 No.-

돼지의 임신기간과 산자성비에 미치는 몇가지 환경요인의 효과

김용환(Yong Hawn Kim),신원집(Won Jib Shin),백동훈(Dong Hoon Baik) 한국축산학회 1988 한국축산학회지 Vol.30 No.7

This study was carried out to investigate the effect of breed, parity, year, season of farrowing and age of sire on gestation length and sex ratio at birth in swine. The data were obtained from 831 litters of Duroc, Hampshire, Landrace and Yorkshire raised at the Swine Breeding Station, National Livestock Cooperatives Federation from 1983 to 1987. This results obtained are summarized as follows: 1. Gestation length was shortest (113.5±.022 days) in Hampshire and longest (115.6±0.16) in Yorkshire (p$lt;0.01). Sex ratio showed no significant differences among the breeds studied. 2. Gestation length was 114.5±0.19 days for the 1st parity, which was significantly different from 115.7±0.14 days for the 7th parity only in Landrace. 3. Gestation length was significantly different among years in Landrace (p$lt;0.01) and Yorkshire (p$lt;0.05). 4. Effect of season on gestation length was significant in Landrace and tended to be longer in spring and summer than others. 5. Gestation length appeared to be longer as the age of the sire increased in Yorkshire.

돼지의 초산월령에 미치는 환경요인의 효과

최광수(Kwang Soo Choi),신원집(Won Jib Shin),백동훈(Dong Hoon Baik) 전북대학교 농업과학기술연구소 1990 농업생명과학연구 Vol.21 No.-

지붕자동개폐식 축사 및 톱밥우상이 한우의 생산성 및 생력사양관리에 미치는 영향

백동훈,최호성,송주엽,최금홍,태광섭 전북대학교 농업과학기술연구소 1996 農大論文集 Vol.27 No.1

This study was carried out to investigate the effects of auto-switchgear at roof on growth performance and raising management, and to determine the adequate depth of sawdust bedding down at barn in Korean Native Cattle. For this study, a total of 25 heads of Korean Native Cattle were fed at the farm located in Imsil district of Chunbuk province. Treatments were consisted of 5 groups (control :conventional barn 0cm sawdust bedding:T1 :auto-switchgear barn, 0cm;T2:auts-switchgear barn, 10cm;T3:auto-switchgear barn, 20cm;T4:auld-swichgear barn,30cm). The results of the study were as follows ; 1. Overall means for weight gain of the steers at a control and treatment 1 through 4 were 141. 0, 159.4, 162.8, 148.4 and 153.2kg, and for daily gain were 0,654.0,754.0.687 and 0.709kg, respectively. 2. Average days of reaching slush of wastes at a control and T1 unbedded down with sawdust were 10.2 and 15 days, respectively. Average time for the elimination of slush is shorter at T1 than at a control. The coats of animals at T1 were cleaner than those of a control. 3. For the comparison among the sawdust thickness, the T4 in the average days to slush condition, the 72 in the elimination per unit hour and T4 in the cleanness of the body of animals, respectively. 4. As for the results of chemical analysis of manure with feces and sawdust, the organic matter was lowest as 32% in the control highest as 38% in the T3. The amounts of organic matterrs, phosphate, potassium were adequate to utilize as organic fertilizer, However, the nitrogen content was estimated 0.26-0.55 % and needed to be added.

육우와 한우의 경제형질

백동훈 제주대학교 농과대학 제주도축산문제연구소 1987 畜産論叢 Vol.2 No.1

Economically important traits in beef and Korean native cattle are defined and several exotic beef breeds are evaluated for those traits. To choose breeds or crosses for beef production, we need to consider economic traits according to the production systems, feed resources available and market requirements. The economically important traits are growth rates, weights at weaning and slaughter, reproductive performances and carcass quality and they need to be standardized to measure. The breeds with high growth rate tend to be good in feed efficiency but poor in reproductive performances. Charolais is excellent in pre- and post-weaning growth and shows very high incidence of dystocia in both pure - and cross-breds. Angus produces top quality carcass. Brahman and Santa Gertrudis stand against harsh environment and resist external parasite like ticks and flies. Male calves of Holstein show faster growth but need to be assessed for the improvement in carcass quality infuture. For Korean native cattle. we need to improve growth rate, milk for nursing calf and quality and quantity of carcass.

韓牛 種牡牛의 體重에 對한 環境要因의 影響

宋柱葉,白東勳,崔淏盛 全北大學校 1996 論文集 Vol.42 No.-

This study was carried out to investigate overall performance and to estimate effects of the environmental factors on body weights of the bull in Korean Native Cattle. Data used for this study included a total of 545 heads of Korean Native Cattle recorded from 1981 to 1990 at Alpine Experiment Station located in Kangwon province. The effects of year of birth, age of dam, parity of dam and season of birth were estimated by means of least squares method. Overall least squares means and standard errors for the body weights of the bull at birth, 4, 6, 12 and 18 months of ate were 26.8±0.13, 99.3±0.58, 142.4±0.80, 338.0±1.34 and 484.2±2.00㎏, respectively. The effects of year of birth showed significant differences on birth weigh and highly significant differences on the other traits. The effects of age of dam showed significant differences on 4 months of age. The effects of season of birth showed significant differences on all of the traits. the calves born in winter or spring were heavier than those born in summer or fall.