• 한국식품과학회지
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• 제16권2호
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• pp.235-241
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• 1984

배추로부터 얻은 펙틴에스테라제 조효소액을 DEAE-셀를로오스 이온교환 수지를 통과시켜 두개의 분획F-A와 F-B를 분리했으며. 그중 주종을 이루고 있는 F-A는 DEAE-셀룰로오스 이온교환수지. CM-셀를로오스 이온교환수지를 통과시켜서 약 340배 정제하였다. F-A와 F-B는 비슷한 염효과를 나타내었는데, 최적 염농도는 $Ca^{++}$ $Mg^{++}$등 2가 양이온의 경우 $20{\sim}50mM$ $K^{+}$, $Na^{+}$등 1가 양이온의 경우 250mM부근이었다. 최적pH는 F-A와 F-B에 대해서 각각 8.0 및 $7.5{\sim}8.0$이였으며. 이들 두 분획은 pH $5.0{\sim}8.0$에서 적어도 한 시간동안 안정했다. F-A에 대한 Km은 펙틴기질에 대해서 0.01%이었다. F-A와 F-B의 최적온도는 각각 $48^{\circ}C$와 $55^{\circ}C$이었으나 $55^{\circ}C$에서 급격히 역가가 감소되었다. 열불활성화 경향은 1차반응을 나타내었으며 $35^{\circ}C{\sim}55^{\circ}C$사이에서 F-B의 D-Value는 F-A보다 커서 F-B가 F-A보다 열에 더 안정한 것으로 나타났다. 한편 Z-value는 F-A 의 경우 $10.5^{\circ}C$, F-B의 경우 $8.3^{\circ}C$이었다.

• 한국가축번식학회지
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• 제11권1호
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• pp.22-25
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• 1987

This study was carried out to investigate the effects of imported pellet frozen semen on sperm motility and NAR acrosomes after thawing, and the farrowing rates, litter sizes and preweaning body weights after artificial insemination. A total of 28 sows of Landrace, Large White and Duroc were inseminated at the Chungnam Provincial Animal Breeding Station. The results obtained are summarized as follows: 1. Landrace andLarge White had higher sperm motility than Duroc by about 20% and had higher NAR acrosomes by about 10%. 2. The farrowing rates of Landrace, Large White and Duroc were 63.6, 55.6 adn 50.0%, respectively. The number of pigs born alive per litter were larger in Landrace and Large White as compared with Duroc (p<.01). 3. Duroc had the highest mean pig weight at birth, followed by Landrace and Large White (p<.01). The mean pig weights at 21 days and 56 days had no significant differences between the breeds.

• Asian-Australasian Journal of Animal Sciences
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• 제14권11호
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• pp.1645-1646
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• 2001

The objective of this study was to develop an in vitro digestion technique to estimate bioavailable energy values of different corn hybrids in swine and poultry. A total of 21 samples were investigated; 18 normal corn (NC) and 3 high-oil corn (HOC) hybrids. One step-two enzymes digestion system was introduced to develop the in vitro technique. The gross energy (GE) values of NC hybrids were correlated with the in vitro disappearing energy values (IVE; r=0.85, p<0.01), the in vitro energy digestibilities (IVED; r=0.70, p<0.01), and the in vitro DM digestibilities (IVDM; r=0.55, p<0.05). It appears, however, that IVE values of NC and HOC hybrids were not significantly different according to the one step-two enzyme digestion system. Results of in vivo and in vitro estimates suggested that there was no significant correlation between them in poultry. The IVE value was regressed linearly with ME and DE values in swine with low regression coefficient (34 and 41%, respectively).

• 치과방사선
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• 제27권1호
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• pp.55-71
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• 1997

Digora/sup (R)/ an intraoral digital radiography system utilizing image plate (IP) - has a dynamic range of exposure time which allows it to decrease the patient's exposure time and to increase diagnostic ability through image processing, transmission and storage. The purpose of this study was to evaluate the Digora/sup (R)/ system by assessing the effects of various exposure times on the detectability on the tip of the endodontic file. Examining the root canals of 45 extracted sound premolars, K -files No. 10, 15, and 20 were placed at slightly varying distances from the apex. The teeth were glued onto resin-plaster blocks. Five exposure times varying between 0.01 seconds and 0.25 seconds were used. Four observers were asked to measure the distance between the tip of the file and a reduction of crown portion, and obtained mean errors (subtracting true file length from the measured file length), comparing Digora/sup (R)/ monitors with E-plus films, which were both obtained under the same geometrical positions. The results were as follows : 1. Comparing E-plus film with Digora/sup (R)/ at 0.01 seconds, the mean errors in E-plus film showed -4.453 nun, -4.497 nun, and -3.857 nun, while the mean errors in Digora/sup (R)/ showed 0.065 nun, 0.607 nun, and 0.719 mm according to the file groups. Therefore there was a significant difference between E-plus film and Digora/sup (R)/(p<0.05). 2. By comparison of mean errors according to the various exposure times in the Digora/sup (R)/ system, the mean error at 0.01 seconds was significantly lower than that at 0.12 and 0.25 seconds in the No. 10 file group(p<0.05). And the standard deviation was the highest at 0.01 seconds. 3. Comparing E-plus film at 0.25 seconds with the Digora/sup (R)/ system, the mean errors showed a significant difference between E-plus film at 0.25 seconds and the Digora/sup (R)/ system at 0.25 seconds in No. 10 and 20 file groups(p<0.05). 4. Comparing E -plus film at 0.25 seconds with other exposure times, the mean errors showed a significant difference between E-plus film at 0.25 seconds and E-plus film at 0 .. 01 and 0.03 seconds in 10 file group(p<0.05). In the No. 15 and 20 file groups, there was a significant difference between E-plus film at 0.25 seconds and E-plus film at 0.01 seconds(p<0.05). In conclusion, Digora/sup (R)/ was better than E-plus film in detectability on the tip of the file at the exposure time of 0.01 seconds in all file groups. And we concluded that Digora/sup (R)/ can shorten exposure times up to 4％ of 0.25 seconds (0.01 sec), which is adequate exposure time for premolar in E-plus film using No. 15 and 20 files.

• Asian-Australasian Journal of Animal Sciences
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• 제8권1호
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• pp.83-88
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• 1995

An experiment was conducted to study the comparative performance of cattle fed young or mature guinea grass (Panicum maximum Jacq. ecotype A) and urea supplemented rice straw. Evaluation was based on intake and digestibility parameters. Twelve crossbred bulls calves weighing $90{\pm}15$ kg were offered young (4 weeks regrowth) or mature (9 weeks regrowth) grass in the long or chopped (10-15 cm) form, and rice straw supplemented with urea. The diets were offered 30-60% in excess of voluntary intake, and the experiment consisted of two periods. The crude protein content of the young grass, mature grass and the straw offered were 12.2, 5.4 and 7.7%, respectively, and the refusal was 10.1, 3.9 and 7.0%, respectively. The organic matter digestibility of the young grass (69%) was significantly higher than the mature grass (62.5%) and straw (55.8%) diets. The organic matter intake (kg/100 kg LW/day) of the unchopped and chopped grass diets were 2.6 and 3.3 respectively, and these values were significantly higher (p < 0.01) than the young grass (2.3) and straw (2.1) diets. The digestible organic matter intake (DOMI) of the mature grass diet offered in the chopped form (2.1 kg/100 kg LW/day) was significantly higher (p < 0.01) than the other three diets. The DOMI of the young and mature grass offered in the long form was similar (1.6 kg/100 kg LW/day), but were significantly better (p < 0.01) than the urea supplemented straw diet.

• 한국식품저장유통학회지
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• 제19권5호
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• pp.703-711
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• 2012

양파는 건강기능성이 우수한 농산물이지만 수확기가 우기와 겹쳐 비에 젖은 상태로 수확되거나 높은 수분함량으로 인하여 저장성이 낮아 양파의 저장 및 가공방법에 대한 연구가 필요하다. 본 연구는 양파의 증숙 및 건조를 위한 증숙시간($X_1$, 5~25 min), 건조온도($X_2$, $55{\sim}70^{\circ}C$) 및 건조 시간($X_3$, 4~20 hr)을 모니터링함으로서 품질이 우수한 건조양파 소재를 얻고자 하였다. 수분함량과 수분활성도에 대한 회귀식의 $R^2$는 0.9514 및 0.9455로 1% 이내에서 유의성이 인정되었으며, 건조온도와 건조시간의 영향을 받는 것으로 나타났다. 색도(Hunter's L, a & b value)에 대한 회귀식의 $R^2$가 각각 0.9419, 0.8818, 0.9360으로 5% 이내에서 유의성이 인정되었으며, 모두 건조온도와 건조시간의 영향을 주로 받았으나 b값은 증숙의 영향이 다소 있는 것으로 나타났다. 관능검사 결과 전반적인 기호도에 대한 회귀식의 $R^2$가 0.8867로 5% 이내에서 유의성이 인정되었다. 전반적인 기호도는 최적 증숙 및 건조 조건인 증숙시간 13.14 min, 건조온도 $63.11^{\circ}C$ 및 건조시간 14.49 hr에서 5.92로 나타났다.

• Journal of Nutrition and Health
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• 제55권4호
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• pp.492-505
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• 2022

본 연구에서는 콩고기에 대한 인식으로 집단을 나누어 이에 따른 식생활 정체성을 파악함으로써, 이를 통해 향후 콩고기 시장 진입을 위한 기초자료로서 국내 소비자의 지속 가능한 식품 선택을 위한 활용에 기여하고자 하였다. 국내 소비자 260명을 대상으로 수집된 자료를 SPSS 통계 프로그램을 이용하여 분석을 진행하였다. 군집 별 국내 소비자를 대상으로 콩고기 인식에 따른 인구 통계학적 분석과 식생활 정체성에 관한 연구 결과는 다음과 같다. 콩고기 인식에 따라 '소극적인 소비자 집단', '적극적인 소비자 집단'으로 군집을 나누었으며, 콩고기 인식에 따른 인구통계학적 분석은 연령, 결혼여부, 교육수준, 가족구성원의 항목에서 유의적인 차이가 나타났다. 콩고기 인식별 식생활 정체성의 결과로는 '친사회적동기 (p < 0.01)', '중심성 (p < 0.01)', '사적 규범 (p < 0.05)', '개인적 동기 (p < 0.001)'에서 유의적인 차이가 나타났다. 유의한 차이가 나타난 4가지 요인 모두 '소극적인 소비자 집단'이 상대적으로 낮은 점수로 나타났다. 본 연구의 결과는 향후 국내 채식주의자의 특성을 정의하는데 활용될 수 있을 것이며, 건강과 환경 등 다양한 국내 소비자의 지속가능 한 삶을 위해 콩고기 시장 확대에도 도움될 것으로 판단된다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권1호
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• pp.45-55
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• 2011

A feeding trial was conducted to study the replacement value of concentrates with Barhar (Artocarpus lakocha) leaves on growth performance of kids fed a mixed jungle grass-based diet. Fifteen Sikkim local kids, about 4 months of age and body weight ranging from 5.8 to 9.2 kg, were randomly distributed into three groups of five. Kids were stall fed ad lib with mixed jungle grass collected from the nearby forest and native scrubland. The kids in group I received supplementary concentrate (Maize 35%, mustard cake 32%, rice bran 30%, mineral mixture 2% and common salt 1%) at approximately 2% of BW. For groups II and III, 25 and 50% of the concentrate was replaced with Barhar (Artocarpus lakocha) leaves, respectively. Total dry matter intake (DMI) was not significantly different among groups. Digestibility of CP decreased (p<0.05) and that of NDF increased (p<0.01) with increasing level of Barhar leaves in the diet. Digestibility of ADF (p<0.01), hemi cellulose (p<0.05) and cellulose (p<0.01) was higher in groups II and III than in group I. Ruminal pH and TVFA concentration were not significantly different among groups. Rumen ammonia-N concentration decreased (p<0.01) with increased level of Barhar leaves in the diet. Similarly, plasma urea nitrogen and blood glucose levels were reduced (p<0.05) with increasing level of Barhar leaves in the diet. Replacement of concentrate with Barhar resulted in reduced Hb and lower serum iron concentration. Levels of other serum metabolites including minerals were not altered by the replacement. Average daily gain (ADG) was 53.3, 54.4 and 41.8 g/d in groups I, II and III, respectively. ADG was not adversely affected when the level of replacement was restricted to 25%. However, at 50% of replacement ADG was significantly lower than the control (p<0.05). Thus, it was concluded that Barhar leaves might replace 25% of the supplemental concentrate for growing Sikkim local kids fed on a mixed jungle grass-based diet.

• 한국방사선학회논문지
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• 제3권1호
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• pp.29-39
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• 2009

본 논문에서는 신경회로망을 이용한 의료영상의 질환부위 인식방법을 제안하였다. 질환부위 인식을 위한 신경회로망은 입력층, 은닉층, 출력층으로 구성하여 적응 오차 역전파 알고리즘으로 학습하였다. 신경회로망에 입력된 의료영상의 특징 파라미터는 웨이브릿 변환에 의하여 분해된 저주파 영역을 행렬식으로 표현하여 특성 다항식의 계수값(n+1)개로 하였다. 추출된 특징 파라미터는 탄젠트시그모이드 전달함수의 범위로 정규화하여 신경회로망의 입력 벡터로 이용하였다. 제안된 방법의 타당성을 입증하기 위해서 실험에 사용된 입력 의료영상을 가지고 모사실험을 통해 질환부위의 인식률을 평가하였다. 실험 결과 4레벨 DWT로 변환된 저주파영역 행렬의 특성 다항식 계수를 탄젠트시그모이드 전달함수의 범위로 정규화하여 신경회로망의 입력 벡터로 이용했을 때 최적의 학습 횟수를 보였다. 신경회로망의 학습은 적응 오차 역전파 알고리즘을 사용하였고, 학습계수를 0.01, 모우멘텀을 0.95로 하였을 때, 위영상에 대해서는 55회, 가슴영상은 55회, CT영상은 46회, 초음파영상은 55회 그리고 혈관영상에 대해서는 157회 등의 최적의 학습 횟수를 보이며 100%의 인식률을 보였다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권9호
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• pp.1253-1260
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• 2017

Objective: Purpose was to determine the effects of grazing system and floor type on concentrations of blood metabolites, activity of creatine kinase, body weight and carcass characteristics of castrated Nguni goats. Methods: Forty eight, 7 month old goats were randomly allocated to herding and tethering treatments from 0800 to 1300 hours and accommodated on slatted and earth floors daily. Blood samples were collected by jugular venipuncture every fifteenth day for metabolite analysis. Slaughter was done at a commercial abattoir following 5 months of monitoring. Results: Tethered goats had significantly higher concentrations of urea (5.19 mmol/L) (p<0.001), creatinine ($55.87{\mu}mol/L$) (p<0.05), total protein (64.60 g/L) (p<0.01), and globulin (49.79 g/L) (p<0.001), whereas herded goats had higher glucose (3.38 mmol/L) (p<0.001), albumin (15.33 g/L) (p<0.05), albumin/globulin ratio (0.34) (p<0.01), and body weight (24.87 kg) (p<0.001). Slatted floors caused higher (p<0.01) albumin at 15.37 g/L. The interaction of grazing system and floor type affected creatinine, total protein, globulin at (p<0.01) and albumen/globulin ratio at (p<0.01). The least creatinine concentration and albumin/globulin ratio was in herded and tethered goats that were accommodated on earth floors, respectively. The highest total protein and globulin concentrations were in serum of tethered goats that were accommodated on earth floors. The highest (p<0.05) dressing percentage (45.26%) was in herded goats accommodated on slatted floors. Conclusion: Herding of goats lowered globulin concentration, improved estimated feed intake, blood glucose and albumin concentrations, albumin globulin ratio, increased body weights and weight related carcass characteristics. Floor type had very little effects on metabolites where earth floors only reduced albumin concentration. Tethering and housing goats on earth floors resulted in double stress that increased chronic infections.