• Journal of Nutrition and Health
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• 제34권5호
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• pp.485-492
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• 2001

The prevalence of type 2 diabetes mellitus has been rapidly increased in parallel with the westernization of eating behavior in Korea. Increased consumption of animal fat and simple sugar can be potential contributors for insulin resistance. The purpose of the study was to determine whether Western-(WD) and Korean-style(KD) diets altered insulin secretion and insulin resistance in male Sprague Dawley rats. Rats weighing 98$\pm$5g were provided by KD(77 En% of starch, 5 En% of corn oil and 13 En% of gluten plus 5 En% of casein), WD(42 En% of starch, 40 En% of butter and 18% of casein) or control diet(62 En% of starch, 20 En% of corn oil and 18% of casein) for 12 weeks. Body weights were lower in KD compared to WD. Fasting blood glucose levels were not different among diets. Insulin secretion from the beta cells was higher by 2.2$\pm$0.4 folds in WD than KD at baseline. In hyperglycemic clamp insulin secretion was higher in WD than KD and CD. Whole body glucose disposal rates referred to the state of insulin sensitivity were lowest in WD among groups. Glycogen deposits in soleus and quadriceps muscles were lowest in WD among all groups, but their triglyceride contents were highest. GLUT4 contents and glycogen synthase were lowest in WD in both muscles. In conclusions, westernization of diets needed more insulin to normalization of blood glucose levels due to increased insulin resistance. Thus, WD would lead to increased prevalence of diabetes mellitus when increased insulin resistance could not be compensated by insulin secretion in the case of elevated blood glucose levels. (Korean J Nutriton 34(5) : 485~492, 2001)

• 한국식품위생안전성학회지
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• 제28권2호
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• pp.181-187
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• 2013

전분의 사용원료를 확인하는 방법은 전분입자의 크기 또는 형태 등으로 분류하는 이화학적인 방법이 연구되었으나 원료별 또는 동일한 원료라도 품종에 따른 차이점으로 인하여 명확하게 확인하기 어려운 단점이 있어 유전자분석법을 시도하였다. 시료는 고구마 전분, 감자 전분, 옥수수 전분 및 타피오카 전분 등 총 11종을 사용하였으며, 유전자추출은 DNeasy plant mini 키트, magnetic DNA purification system 및 CTAB 방법으로 하였으며 추출유전자의 증폭을 위하여 WGA 키트로 처리하였다. 그리고 고구마, 감자, 옥수수 및 타피오카 검출을 위한 유전자 부위는 SSR (simple sequence repeat, ib-286-F/ib-286-R), 자당합성효소(potato sucrose synthase, Pss 01n-5'/Pss 01n-3'), 전분합성효소(starch synthase, SSllb 3-5'/SSllb 3-3') 및 SSR (SSRY26-F/SSRY26-R)를 각각 사용하였다. 그 결과 대부분의 경우 WGA를 처리한 경우에는 사용원료의 확인이 가능하였다.

• 한국식품과학회지
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• 제26권3호
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• pp.305-309
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• 1994

이축압출성형기를 사용하여 붉은 통팥과 옥수수전분을 원료로 하여 압축성형하고 이를 건조, 분쇄, 배합하여 즉석팥죽 분말을 제조하였으며 이때의 제조공정과 제품의 품질을 검토하였다. 원료의 수분함량 $24{\sim}26%$, 압출성형온도 $150{\sim}155^{\circ}C$, 스크류의 회전속도 350 rpm 및 원료투입량 60 kg/hr의 압출성형조건으로 제품을 생산하였을 경우 팥죽 고유의 냄새와 색상을 유지하는 제품을 얻을 수 있었다. 압출성형중 분말원료에 가해지는 가수량이 6 kg/hr에서 2 kg/hr로 감소됨에 따라서 압출성형온도는 $150^{\circ}C$에서 $198^{\circ}C$로, 기계적소모에너지는 134 kwh/ton에서 144 kwh/ton으로 증가하였다. 건조분말상태에서 caking이 형성이 되지 않는 수분함량인 4% 이하로 건조되는 열풍건조 조건은 건조온도 $80^{\circ}C$ 에서는 4시간, $100^{\circ}C$ 에서는 1.5시간 이었다. 압출물의 분쇄후 분말의 입도분석은 체목이 0.5 mm인 것을 사용하였을 경우 약 80%가 65 mesh 체를 통과하였고, 1 mm인 체목인 경우는 약 65%가 65 mesh 체를 통과하였다. 최종배합제품의 수분흡수속도는 설탕배합구가 100% RH하에서 13시간이 경과된 후 caking이 형성되었다. 팥압출물분말, 옥수수전분 및 설탕의 배합비를 달리한 제품의 기호도 검사에서 팥의 함량이 줄어듬에 따라 팥죽냄새가 감소하여 기호성이 저하되었다.

• 한국식품과학회지
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• 제17권2호
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• pp.114-120
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• 1985

한국 고유의 튀김식품으로서 유지(油脂)함량이 약 20%인 약과(藥菓)를 시료로, 튀김기름(기름의 종류와 가열처리여부)과 저장조건(온도, 습도, 형광등 조사여부)을 각각 달리하여 20주동안 저장하면서 산값, 과산화물값, 관능검사를 실시한 결과는 다음과 같다. $5^{\circ}C$저장 실험에서 산값, 과산화물값은 완만하게 증가하였고 13주후에도 과산화물값은 20 meq/kg에 미달하였다. $40^{\circ}C$에서는 산값과 과산화물값은 다소 급격한 증가를 보였으며 산패(酸敗)진행속도가 빠르게 나타났다. 약과의 텍스쳐 변화를 보면 저장습도가 낮은 곳(RH25%)에서는 탈습(脫濕)되어 매우 딱딱한 느낌을 주었고 저장습도가 높은 곳(RH80%)에서는 흡습(吸濕)되어 다소 눅눅해졌다. 튀김기름의 종류에 따른 영향은 저장기간이 경과함에 따라 옥수수기름, 유채유, 콩기름군이 각각 다른 순으로 높은 산값과 과산화물값을 나타냈다. 저장후기에는 유채유-형광등 조사군(照射群)이 모든 실험군 중애서 가장 높은 산값과 과산화물값을 나타냈다. 형광등 조사군은 어두운 곳 저장군에 비해 높은 값을 나타냈고 신선한군에 비해 가열(加熱)처리군이 높은 값을 나타냈다. 관능검사(官能檢査) 점수를 보면 저장기간이 경과함에 따라 산패취(酸敗臭)가 점진적으로 증가하였다. 튀김기름의 종류, 저장조건, 가열처리에 따른 산패취의 차이는 유의적(有意的)으로 나타나지 않았다. 산값과 관능검사 점수사이에는 비록 낮기는 하지만 저장 전기간에 걸쳐 정(正)의 상관관계(相關關係)를 볼 수 있었고 저장기간이 경과할수록 상관계수는 점차 커졌다. 과산화물값과 관능검사 점수사이에는 저장 6주까지는 정(正)의 상관관계가 인정되었으나 저장 9주에는 부(負)의 관계를 나타냈다.

• 농업과학연구
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• 제26권1호
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• pp.12-20
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• 1999

The purpose of this study was to research the change of the forest in Myungseo-lee Sanchuk-myun, Chungju where most of the area managed the Swidden Agriculture(Shifting cultivation). The mountainous district should be used and developed the multi-purposing source among the agricultural field, grassland, forest, a recreational area, and an industrial site, and should be presupposed the establishment of synthetic and efficient change system. This study began to pay attention to observe the peculiarity of Swidden Agricultural area in terms of forest aspects and to broaden the outlook of Swidden Agriculture. In the status of Myungseo-lee, prior to the Project to Rehabilitate the Illegal Swidden, from 1973 to 1976, the private forest gets 110.9ha (23ha for Seodae-village, 26ha for Dooduk-village, 6ha for Myungdol-village, 41ha for Chungam-village, 14.9ha for Pangdae-village). In Myungseo-lee. millet and corn were harvested, and they performed the rotation of planting and temporary resting by changing the field. The cultivated acreage per a house of total 5 villages in Myungseo-lee was just 0.4ha in average. The 70ha of the Swidden in Dooduk-village. Myungseo-lee, was sold to the Miwon corp. and the 342ha of that in Myungseo-lee was sold to Seohae-devlp.(SK forest). Those areas afforested. As the regulation plan for the Swidden began, the people in the site got paid for 300,000won as a migration fee. The special feature of the Swidden in Myungseo-lee was that the whole migration village was already established before the regulation plan for the Swidden began, and the yield was harvested by more than other villages the use of chemical fertilizer. And, in the Swidden agriculture, it showed the well-cultivated aspect, and the major harvest was various grains. The regulation Swidden in Myungseo-lee started in 1974.

• Asian-Australasian Journal of Animal Sciences
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• 제33권6호
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• pp.913-920
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• 2020

Objective: The objective of this experiment was to compare conventional antioxidants and plant extracts for oxidative stress control in lambs fed a high-concentrate diet. Methods: Forty-eight male Dorper×Santa Ines lambs with an initial weight of 20±1.49 kg and 60 days of age, were used to evaluate the effects of feeding a combination of Macleaya cordata and Magnolia officinalis plant extracts (0 vs 320 mg/kg dry matter [DM]) in combination with selenium+vitamin E (0 vs 100 IU/kg DM of vitamin E and 0.1 mg/kg DM of selenium) in a completely randomized block design in a 2×2 factorial arrangement. The animals were housed in individual pens and received a high-concentrate diet consisting of 80% whole corn and 20% protein pellet for 60 days. The animals were weighed at the beginning of the experiment and every 14 days for performance monitoring. Three blood samplings were performed during the experimental period for the evaluation of oxidative and protein parameters. Results: The treatments with vitamin E and selenium as additives had a positive influence on final weight, daily weight gain, carcass weight, and selenium content in longissimus muscle (p = 0.01). Plant extracts tended to improve final weight (p = 0.064) and daily weight gain (p = 0.059), showing similar effect as selenium and vitamin E. There was no effect of treatment on blood proteins, indicating that the animals were healthy throughout the experiment. Conclusion: The use of plant extracts had a similar effect as the addition of selenium and vitamin E, with dietary inclusion of additives resulting in better performance of lambs but both supplements did not have strong influence on oxidative stress.

• 한국식품저장유통학회지
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• 제12권3호
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• pp.235-240
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• 2005

곡류의 기능성 소재를 바탕으로 칼로리가 낮고 조직감이 우수한 편의식 형태의 아침대용식 제품을 개발하기 위하여 9가지 곡물(옥수수, 통밀, 멥쌀, 흑미, 현미, 수수, 발아현미, 검은콩, 율무)을 이용하여 선식형과 퍼핑형 씨리얼바 2종류를 제조하여 수분함량, 색도, 조직감 등의 품질변화를 측정하였다. 씨리얼바의 제조는 9가지의 곡류 배합${\to}$부재료의 크림화${\to}$반죽${\to}$성형틀에 투입${\to}$굽기${\to}$냉각${\to}$견과류 토핑의 단계로 이루어졌다. 수분함량은 선식형 씨리얼바가 $9.4\%$, 퍼핑형 씨리얼바가 $10.1\%$였으며 색도 측정 결과 L값은 퍼핑형이 선식형보다 높았으며 a값은 프락토올리고당을 첨가한 선식형의 씨리얼바가 가장 강했으며 b값은 시료간에 유의적 차이를 보이지 않았다. 조직감에 있어 경도는 선식형보다 퍼핑형이 더 컸으며 선식형 씨리얼바의 경우에 프럭토올리고당을 첨가한 군이 가장 경도가 높았다. 관능검사 결과 전반적인 바람직성에 있어서 퍼핑형 씨리얼바가 선식형 씨리얼바보다 높은 기호도를 나타내었다.

• Asian-Australasian Journal of Animal Sciences
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• 제28권9호
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• pp.1335-1344
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• 2015

A set of prediction equations to estimate the nitrogen-corrected apparent metabolizable energy (AMEn) of individual ingredients and diets used in the poultry feed industry was evaluated. The AMEn values of three energy ingredients (maize, sorghum and defatted maize germ meal), four protein ingredients (soybean meal, maize gluten meal 60% crude protein, integral micronized soy and roasted whole soybean) and four diets (three containing four feedstuffs, complex diets, and one containing only corn-soybean meal, basal diet) were determined using a metabolism assay with male broilers from 1 to 7, 8 to 21, 22 to 35, and 36 to 42 days old. These values were compared to the AMEn values presented in the tables of energy composition or estimated by equation predictions based on chemical composition data of feedstuffs. In general, the equation predictions more precisely estimated the AMEn of feedstuffs when compared to the tables of energy composition. The equation AMEn (dry matter [DM] basis) = 4,164.187+51.006 ether extract (% in DM basis)-197.663 ash-35.689 crude fiber (% in DM basis)-20.593 neutral detergent fiber (% in DM basis) ($R^2=0.75$) was the most applicable for the prediction of the energy values of feedstuffs and diets used in the poultry feed industry.

• 한국농공학회지
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• 제17권3호
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• pp.3885-3893
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• 1975

This work was intended to study the cutting graph and vibratory phenomina of a newly developed mower which may be suitable for mowing agricultural product having large and hard stems like corn and sugar beet. The system consists of cutter-bar having Curvilinear-translation motion, which attached to drag-crank mechanism. The motion of equation developed for experimental vibratory system which equipped with the cutter-bar system was established and the parameters defining the system's vibratory motion were experimentally determined. The optimum balancing weight for the cutter-bar am vibratory characteristics of the cutter-bar for various counterweight were analyzed to provide the design and operational conditions. The results of the study are summarized as follows; (1) The cutting graph by the new cutter-bar system depends upon the magnitude of ratio of forward travel(Vm) to crank speed (R$\omega$); The cutting pitch for Vm/R$\omega$ 1 (whole cycle cutting) and Vm/R$\omega$=2/$\pi$ (a half cycle cutting) are 2$\pi$ Vm and 4R, respectively. (2) The experimental vibratory system had been proved to function adequately so that it can be used in determining the required counterweight to minimize the vibratory motion of cutter-bar. (3) Experimentally determined counterweight to give the least vibratory motion was a little greater than the theoretically determined one. With the optimum counterweight it was possible to reduce up to about 87% of the amplitude without counterweight, which may be considered to be within safe operational region. (4) To avoid the actual operation of the cutter-bar at resonance which occured in low frequency ratio, it was considered that the rotational speed of the crank for a specific design of mower should be determined separately in connection with the desired cutting graph.

• 한국가금학회지
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• 제22권2호
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• pp.77-84
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• 1995

In order to investigate the effect of feeding live yeast culture on the performance of laying hens, a feeding trial was conducted with 96 20-wk-old Hy4ine brown layers during their laying period of 60 wk. The live yeast culture used was a product from Saccharomyces cerevisiae that was cultured on the corn-based substrate followed by careful drying of whole material not to lose the viability of yeast. Three levels of yeast culture as 0.5, 1.0, and 2.0% for three treatments and 0% for the control were included in the experimental diets. The feeding trial was carried out for 60 wk from August 26, 1992 to October 26, 1993. To evaluate the performance of layers during cold or hot periods as affected by the yeast culture feeding, data from the 12-wk winter period and 12-wk summer period were separated and analyzed accordingly. During 60 wk of laying period hen-day egg production was slightly but significantly(P<.05) improved by feeding the yeast culture. The average egg weight and daily egg weight(g /day) were also increased by the yeast culture. Feeding the yeast culture did not increase feed intake but feed efficiency was improved significantly (P<.05). No significant difference was detected in egg or eggshell qualities between control and yeast culture-treated groups. Feed intake and egg weight were not affected by the yeast culture feeding under both cold and hot period, but egg production and feed efficiency during hot summer improved significantly by its feeding. This result indicates that the effectiveness of the yeast culture feeding is greater during summer than winter for laying hens.