• Applied Biological Chemistry
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• 제49권1호
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• pp.49-54
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• 2006

쌀 전분에 phosphorus oxychloride$(POCl_3)$를 단계별(전분 고형분 대비 $0.005{\sim}0.06%$)로 2시간 반응시켜 가교화 쌀 전분을 제조하고, 변성된 쌀 전분의 용해도, 팽윤력, RVA, DSC, X-ray 특성을 연구하였다. 팽윤력은 일반 쌀 전분 보다 다소 낮은 온도에서 증가되기 시작하였으나 그 이후는 모두 낮은 수치를 보여 가교화 쌀 전분이 일반 쌀 전분보다 완만한 상승을 나타내었다. 용해도는 가교화 쌀 전분이 일반 쌀 전분보다 전체적으로 낮은 결과를 나타내었고 $POCl_3$ 함량에 따른 유의적인 차이는 보이지 않았다. RVA 분석결과 가교화 쌀 전분이 일반 쌀전분보다 pasting temperature와 최고점도는 낮아졌고 holding strength와 final viscosity는 높은 경향을 나타내어 breakdown과 setback 은 낮은 것으로 나타났다. DSC 분석 결과 가교화 쌀 전분이 일반 쌀 전분보다 $T_o$, $T_p$, $T_c$가 감소하였으나 ${\Delta}H$의 경우 큰 차이가 나타나지 않았다. X-ray 회절분석 결과 일반 쌀 전분 보다 $POCl_3$ 함량에 따라 상대적 결정화도가 소폭 감소되는 결과를 나타내었으나 95% 신뢰도 수준에서 유의적인 차이는 없는 것으로 나타났다. 따라서 가교화 쌀 전분의 경우 전분입자가 $POCl_3$ 의해 강한 공유 결합을 형성함으로써 내열성, 내전단성의 성질이 생겨 호화가 일어난 후에 점도가 많이 낮아지지 않은 것으로 판단되며 전분의 결정형태에는 크게 영향을 미치지 않으나 전분의 무정형 부분에 영향을 주어 쌀 전분의 팽윤력, 용해도 및 pasting property등의 물리화학적 성질에 변화를 주는 것으로 판단되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제8권2호
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• pp.187-194
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• 1995

Genetic variants of ${\alpha}s_1$-casein, ${\beta}$-casein, ${\kappa}$-casein and ${\beta}$-lactoglobulin were investigated by starch urea gel electrophoresis in milk samples of 280 Korean native cattle. A new ${\beta}$-casein variant, designated ${\beta}$-casein $A^4$, was found in milk samples of Korean native cattle. It has a much slower electrophoretic mobility than the ${\beta}$-casein $A^3$ variant in acid gel. This new variant appeared together with either ${\beta}$-casein $A^1$, $A^2$ or B variant. Gene frequencies and genotypic frequencies were estimated. Gene frequencies of four milk protein loci in Korean native cattle were compared with those of imported cattle breeds raised in Korea and Japanese brown cattle. Gene frequencies were ${\alpha}s_1$-casein B .846, ${\alpha}s_1$-casein C .154; ${\beta}$-casein $A^1$ .216, ${\beta}$-casein $A^2$ .666, ${\beta}$-casein $A^4$ .048, ${\beta}$-casein B .070; ${\kappa}$-casein A .648, ${\kappa}$-casein B .352; ${\beta}$-lactoglobulin A .148, ${\beta}$-lactoglobulin B .852. The population was in Hardy-Weinberg equilibrium at all milk protein loci. Gene frequencies of Korean native cattle were very similar to those of Japanese brown cattle. Interestingly, a new variant, ${\beta}$-casein $A^4$, was found only in Korean native cattle and Japanese brown cattle. These results support the hypothesis that Korean native cattle were used in the development of the Japanese brown cattle.

• 동아시아식생활학회지
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• 제18권4호
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• pp.524-530
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• 2008

본 연구는 감귤 부산물 첨가 사료를 급여한 토종닭 고기의 이화학적 특성 및 기호도를 파악하기 위하여 실시하였다. 토종닭은 감귤 부산물을 급여하지 않고 산란계 배합 사료로 39주령까지 사육한 것(T0구), 그리고 17주령부터 감귤 부산물을 급여한 것(T1구)으로 나누어 각각 54마리씩 3반복 사육하였다. T1구의 사료는 16주령까지 T0구와 동일하고, $17{\sim}39$주령에는 T0구에 감귤 부산물을 4% 첨가하여 제조하였다. 토종닭($1.30{\pm}0.5kg$) 고기는 도계 후 냉장 2일째 실험에 이용하였다. 가슴살 빛 다리살의 명도($L^*$), 적색도($a^*$), 황색도($b^*$), 보수력, 동결 감량, 해동 감량 및 가열 감량은 모두 감귤 부산물 급여에 의한 유의적 차이가 없었다. 물성에 있어서 탄성, 응집성, 뭉침성 및 씹힘성은 가슴살과 다리살 모두 감귤 부산물 급여에 의한 유의적 차이가 없었으나, 경도와 전단력은 감귤 부산물을 급여한 T1구가 유의하게 낮았다(p<0.05). 산가 및 과산화물가는 T0구보다 T1구가 다소 낮게 나타났으나 유의적 차이가 아니었다. 항산화력은 T0구보다 T1구가 좋은 현상을 보였다. 생육의 관능적 색깔 및 냄새는 T0구와 T1구의 차이가 없었으나 가열육의 기호성은 T1구가 유의하게 (p<0.05) 우수하여 감귤 부산물의 급여 효과가 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제12권7호
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• pp.1011-1014
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• 1999

Blood protein polymorphism of fowls in Laos was analyzed by electrophoresis. Blood samples were collected in the area of Viangchan, Louangphrabang and Pakxe. Out of 17 loci, polymorphism was detected at the following seven loci; ES-1, Amy-1, Akp-akp, Akp-2, Alb, Tf and Pas. The other ten loci; Amy-3, LDH, 6-PGD, PGM, PHI, To, MDH, Es-D, Hb-l, Hb-2 were noted to be monomorphic. The proportion of polymorphic loci $(P_{poly})$, the expected average heterozygosity per individual ($\bar{H}$), and the subdivision index $(G_{ST})$ of the native fowl in Laos was $0.412{\pm}0.123$, 0.106 and 0.026, respectively. Genetic distance between native fowls in Laos, Bangladesh, and Nepal was clustered in one group.

• Asian-Australasian Journal of Animal Sciences
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• 제27권4호
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• pp.518-523
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• 2014

There are multiple experiments conducted with male Korean native ducks (KND) to evaluate the optimal levels of limiting amino acids (AA). In Exp. 1, a total of 450 one-d-old male KNDs were divided into five groups with six replicates and fed experimental diets with varying levels of lysine, total sulfur amino acids (TSAA) and threonine (T1, 0.90/0.74/0.70%; T2, 1.00/0.82/0.77%; T3, 1.10/0.90/0.85%; T4, 1.20/0.98/0.93%; T5, 1.30/1.07/1.01%) to 21 d of age. In Exp. 2, one-d-old male KND were received and fed commercial starter diet from hatching to 21 d of age, and then divided into five groups with six replicates and fed one of five diets varying levels of lysine, TSAA, and threonine (T1, 0.73/0.62/0.54%; T2, 0.80/0.68/0.60%; T3, 0.87/0.74/0.65%; T4, 0.94/0.80/0.70%; T5, 1.01/0.86/0.75%) during 22 to 56 d of age, respectively. The BW gain was linearly increased as dietary limiting AA levels increased to 1.20% lysine, 0.98% TSAA and 0.93% threonine. There were no significant differences in feed intake, gain:feed and uniformity among groups. In Exp. 2, the BW gain and gain:feed were not affected by dietary limiting AA levels. There were no significant differences in carcass characteristics and meat quality among groups. The growth performance and carcass characteristics did not show the significant response to increasing dietary limiting AA levels in KND during 22 to 56 d of age. In conclusion, the levels of lysine, TSAA and threonine necessary to maximize growth for starter phase were at least 1.20%, 0.98%, and 0.93%, respectively. On the other hands, KND require relatively low levels of limiting AA for late growth and carcass yield. The dietary levels of 0.73% lysine, 0.62% TSAA and 0.54% threonine appear to be adequate during growing phase.

• 대한수의학회지
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• 제30권4호
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• pp.473-478
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• 1990

This survey was conducted to observe the prevalence of blood parasites in slaughtered cattle included Korean native cattle, Charolias, Hereford, Aberdeenangus and Holstein breeds in the Western area of Kyeongnam. The results obtained are summarized as follows: 1. The prevalence of T sergenti was shown 71.8% as 395 heads of a total of 550 heads examined and from Jaunary to November the monthly prevalence of T sergenti was shown the range of 61.1% to 84% except 38.5% in December. The other blood parasites included Babesia and Anaplasma were not detected from the blood samples except Setaria spp microfilariae. 2. The distribution of parasitaemia levels of T sergenti in positive cattle was shown 93.9% in the range of 1~10/1000 rbc, 4.1% in 11~20, 1.3% in 21~30 and 0.8% above the range of 31. 3. The pervalence of T sergenti by breeds of slaughtered cattle was shown 71.2% in Korean native cattle, 72.7% in Charolias, 78.3% in Hereford and 81. 8% in others (Aberdeen-angus and Holstein) respectively. Also the parasitaemia levels in these cattle were shown higher levels in imported cattle included Charolias, Hereford, Aberdeen-angus and Holstein breeds comparing with Korean native cattle. 4. The prevalence of Setaria spp microfilariae in slaughtered cattle was shown 6.9% and by monthly prevalence of the parasite was shown higher in March, April and May compared with June, July, August and October. But in the winter season included January, February, November and December the parasite was not detected from the blood samples. 5. The distribution of parasitaemia levels of Setaria spp microfilariae per ml of blood was shown 65.8% in the range of 1~50, 13.2% in 51~100 and 10.5% in 101~200 and above the range of 201, respectively.

• 한국자원식물학회지
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• 제13권3호
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• pp.202-207
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• 2000

자생식물 16종의 종자형질 특성 및 저온습윤 및 변온 처리에 의한 발아양상을 조사하기 위하여 본실험은 수행되었다. 종에 따라 종자의 길이, 넓이, 폭은 각각 1.1∼8.9, 0.7∼7.5, 0.4∼l.7mm의 범위였으며 천립중은 0.1∼8.8g의 범위였다. 무처리에서 발아율이 가장 높은 종에 있어 냉이와 익모초는 암조건에서 각각 16, 36%이었으며 장구채와 각시취는 명조건에서 각각 69, 81%이었다. 참취, 고려엉겅퀴, 곰취, 질경이, 청옥취는 저온습윤처리 명조건에서 각각 84, 29, 57, 78, 95%로 물엉겅퀴는 암조건에서 30%로 발아율이 가장 높았다. 변온처리에서 발아율이 높은 종에 있어 두릅나무와 벌개미취는 명조건에서 각각 2,57%로, 수리취는 암조건에서 52%로 가장 높았다.

• 대한영상의학회지
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• 제82권2호
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• pp.429-434
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• 2021

아밀로이드증은 세포 외 공간에 비정상적인 단백질이 축적되는 것을 특징으로 하는 전신 질환이며, 심근을 포함한 다양한 기관을 침범한다. 저자들은 심장 아밀로이드증 환자에서 항암 화학 요법 및 줄기세포 이식 후 심장 자기공명영상의 추적검사에서 조영 전 T1 및 T2 수치와 세포 외 부피 분율의 감소를 보인 사례를 보고한다. 조영 전 T1 이완시간 및 세포 외 부피 분율은 아밀로이드증 환자에서 조직의 아밀로이드 축적 정도와 밀접한 관련이 있다. 이 사례를 통해 T1 지도화 심장 자기공명영상 기법이 심장 아밀로이드증의 치료 반응 모니터링에 비침습적이며 정량적인 도구로서 큰 역할을 할 수 있는 가능성을 확인할 수 있다.

• 대한수의학회지
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• 제35권4호
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• pp.777-783
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• 1995

A monoclonal antibody(MAb), KCT-23ER, with specificity for E-rosetted T cells of Korean native cattle was prepared by cell hybridization of myeloma P3/NS-1/1-Ag-4-1 and spleen cells from BALB/c mice hyperimmunized with E-rosetted lymphocytes. The isotype of KCT-23ER to T lymphocytes was mouse $IgG_{2b}$. KCT-23ER was reacted with 53.6% to peripheral blood lymphocytes and with 67.8% to nylon wool nonadherent blood lymphocytes. And it was reacted with 72.2%, 59.2% and 35.3% to thymocytes, prescapular lymph node cells and splenocytes, respectively. Immunocytological reactive rates to E-rosetted and non-E-rosetted cells were 72.5% and 22.4%, respectively. These results indicated that KCT-23ER reacted to E-rosetted cells was one of the MAb for investigate of $CD_2$ receptor positive cell subset in the Korean native cattle.

• 자원환경지질
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• 제21권3호
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• pp.287-307
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• 1988

The Cheongju gold-silver mine is located at approximately $36^{\circ}28^{\prime}$north latitude and $127^{\circ}31^{\prime}$ east longitude in the Cheongju City of the Chung cheong bug Do, South Korea. Gold-Silver bearing hydrothermal quartz veins, occur in Cheongju Granit of Jurassic age. K-Ar isotope data for sericite in quartz vein indicate that the Au-Ag mineralization took place in early Cretaceous ($97.5{\pm}2.18$ MA. Park, et ai, 1986). Three stage of mineralization recognized anre, from early to later, (I) Sulide stage: pyrite, arsenopyrite, pyrrhotite (Hpo), sphalerite, chalcopyrite, electrum and quartz (II) Electrum stage: pyrite, sphalerite, galena, chalcopyrite, electrum and quartz. (III) Silver mineral stage: pyrite, marcasite, pyrrhotite (Mpo), sphalerite, galena, electrum, native silver argentite, fluorite, calcite and quartz. In this paper, mode of occurrences and chemical compositions of electum and native silver have been investigated by means of microscope and EPMA. Electron probe microanalysis shows that an individual grain of electrum is almost homogeneous in composition. Silver content of electrum ranges from 44.7-67.1 atom.%. Gold content of native silver ranges below 0.2 atom. %. Vicker's hardness number (VHN) of electrum and native silver ranges $78.2-81.8kg/mm^{2}$ respectively. The filling temperature of fluid inclusions in quartz ranges from $130-280^{\circ}C$. On the basis of arsenpyrite geothemometer, the equilibrium temperature and sulfur fugacity of the pyrite-arsenopyrite-pyrrhotite(Hpo) assemblage is assumed to be in ange from $300-310^{\circ}C$ and $10^{-10}$ to $10^{-11}$ atm. The estimated ore reserviors on Cheongju mine area are calculated to 8000 T/M, averaing 8.6g/t Au, 27.8 g/t Ag, 1.25% Pb, l.65% Zn.