• Korean journal of food and cookery science
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• v.23 no.2 s.98
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• pp.245-251
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• 2007

The purpose of this study was to examine how potato glycoalkaloid(PGA) contents changed as storing temperatures and periods changed for potatoes(Superior) cultivated in Korea. Some potatoes were stored at $5^{\circ}$C for 80 days, and others were stored at $20^{\circ}$C for 40 days. PGA contents were measured every 20 days for the potatoes stored at $5^{\circ}$C and 10 days for those stored at $20^{\circ}$C. The results can be summarized as follows. The amounts of a-chaconine and a-solanine measured on the first day of storage were 54.22 mg/100 g and 26.57 mg/100 g, respectively. Thus, the a-chaconine content was almost twice as much as the a-solanine content. The sprouts of potatoes stored at $5^{\circ}$C grew by 0.4 cm in 20 days, 1 cm in 40 days, 1.8 cm in 60 days, and 5.2 cm in 80 days. Furthermore, the PGA content increased by 3.5% in 20 days, 11.6% in 40 days, 23.4% in 60 days, and 41.4% in 80 days, compared to the PGA content on the first day. The sprouts of potatoes stored at 20 grew by 0.5 cm in 10 days, 2.3 cm in 20 days, and 7.4 cm in 40 days. Furthermore, PGA content increased by 12.5% in 10 days, 36.6% in 20 days, 44.8% in 30 days and 48.4% in 40 days, compared to the PGA content on the first day. Thus, we determined that potatoes stored at $20^{\circ}$C showed faster sprout growths and faster increases in PGA content than those stored at $5^{\circ}$C.

• Food Science and Preservation
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• v.23 no.6
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• pp.839-847
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• 2016

The changes of approximate composition, antioxidant activity and melatonin content in rapeseed were monitored during 10 days germination to choose the optimum sprouts with beneficial functionalities. The moisture content of seeds increased from 3.23% to 17.50% during 10 days germination period, while ash content was similar (4.03~4.91%). The fat content was reduced from 38.18% to 22.65%, however, protein content increased from 21.43% to 26.72%. The carbohydrate content increased from 32.71% to 35.84% at 8th day. The reducing sugar and fiber contents reached 10.47% and 15.12% at 6th day from 4.04% and 12.82%, respectively. Eighth day sprouts contained highest level of polyphenol (gallic acid equivalent, 19.2 g/kg). Germination increased antioxidant activities (trolox equivalent, mmol/kg) of seeds with slight difference depending on assay. That is, antioxidant activity was highest at 6th day in DPPH radical scavenging (55.9), 10th day both in ABTS radical scavenging (71.6) and Fe(III) reducing (125.3), and 4th day in peroxy radical scavenging (116.7) assay. Melatonin content of seeds ($0.85{\mu}g/kg$) also increased and reached up to $14.93{\mu}g/kg$ at 6th day. In conclusion, germination more than 4 days raised antioxidant activity of seeds highly, and 6th day sprouts had additional benefit in terms of melatonin, reducing sugar and crude fiber contents.

• Korean journal of applied entomology
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• v.51 no.1
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• pp.67-72
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• 2012

This study was conducted to evaluate the scouting methods for larva and adults of the alfalfa weevil, $Hypera$ $postica$ Gyllenhal on Chinese milkvetch, $Astragalus$ $sinicus$ L. in the field. Three sampling methods, shake-bucket, shake-picking, and a sweeping net were evaluated for collecting alfalfa weevil larvae. We found significant differences among scouting methods and date in all survey fields. Sweep-net sampling was less able to detect small larvae than large larvae, which were not detected until early April whereas the shake-bucket, and shake-picking methods efficiently collected larvae from middle March. A Pitfall trap with three different baits - no bait, kidney bean seeds and sprouting kidney beans were compared for collection efficiency of alfalfa weevil adults. Collection efficiencies were significantly different by bait(p<0.018). Traps baited with sprouting kidney beans were the most efficient for collecting the alfalfa weevil. The number of alfalfa weevil caught was not significantly different between kidney bean seed and no bait in the pitfall trap. Therefore, the shake-bucket method for larvae and a pitfall trap baited with sprouting kidney beans for adults are recommended for scouting of the alfalfa weevil in a Chinese milkvetch field.

• The Korean Journal of Mycology
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• v.12 no.4
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• pp.153-157
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• 1984

In order to investigate an etiological characteristics of the pepper anthracnose fungus infected with Collectotrichum dematium, this experiment was undertaken. Isolation percent of the fungus was 55.3% from the seed sample of Jewon and 0.3% from that of Eumsung Kun, according to seed health blotter method. Although the acervulus was similar to the known two Colletotricum species, C. acutatum and C. gloeosporioides, setae was not only straightly extended above the acervulus, but also shaped as falcate conidia ranging $12{\sim}31.2{\times}2.4{\sim}4.8{\mu}m$. Acervului of the fungus were evenly scattered on the surface of pepper seed coat, and caused seedling blight after seed germination. Pre-and post-emergence seedling blight as well as foliar lesion and fruit rot was confirmed by inoculating conidial suspension. No typical anthracnose sysmptom was obtained from soybean seedlings, welsch onion and spinach seedlings upon inoculation. Therefore, this fungus is said to the undescribed form species of the fungus of pepper in Korea (Colletotricum dematium f. sp. capsicum).

• Journal of Life Science
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• v.30 no.12
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• pp.1101-1108
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• 2020

Tartary buckwheat is a grain with many flavonoids, such as rutin, quercetin, kaempferol, and myricetin. This study aimed to optimize extraction conditions to maximize the rutin, quercetin, and myricetin contents of tartary buckwheat sprout extracts using response surface methodology. A BoxBehnken design containing 15 experiments was employed to evaluate the effects of extraction conditions, such as temperature (X1, 50~70℃), extraction time (X2, 5~9 hr), and ethanol concentration (X3, 60~90%). The coefficients of determination (R2) for all the dependent variables (extraction temperature, extraction time, and extraction ethanol concentration) were determined to be over 0.95, indicating significance. The p-value of the model in lack of fit was over 0.1 than means, indicating that the model was well predicted. The optimal extraction conditions for rutin, quercetin, and myricetin contents were obtained at X1 = 51.03, X2 = 6.62, and X3 = 69.16, respectively. Under these optimal conditions, the predicted rutin, quercetin, and myricetin contents were 808.467 ㎍/ml, 193.296 ㎍/ml, and 37.360 ㎍/ml, respectively. For the validation of the model, ten experiments were performed and the experimental rutin and quercetin contents were measured at 802.84±8.49 ㎍/ml, 193.76±2.80 ㎍/ml, and 34.84±0.43 ㎍/ml, respectively. The experimental rutin and quercetin contents were similar to the predicted contents, but the experimental myricetin content was lower than predicted.

• The Science & Technology
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• v.33 no.5 s.372
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• pp.76-77
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• 2000

노벨상 1백년사가 배출한 3백여명의 수상자 중 여성과학자는 불과 11명에 지나지 않는다. 그중에서도 신경발육인자(NGF)를 발견하여 미국의 스탠리 코헨과 함께 1986년도 노벨생리학 및 의학상을 탄 이탈리아의 여성과학자 리타 레비-몽탈치니는 이탈리아의 파시스트정권의 탄압을 피해 침실과 지하 그리고 산 속으로 숨어다니면서 연구를 계속했다. 그는 "만약 차별대우나 박해를 받지 않았다면 노벨상을 타지 못했을 것"이라고 말하고 있다.

• Proceedings of the Korean Society of Food and Cookery Science Conference
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• 2003.10a
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• pp.89-89
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• 2003

고사리(Pteridium aquilinum)는 봄철에 어린싹을 삶아 물에 담구었다가 먹거나 건조시켜 저장해서 이용하는데 현재 유통되고 있는 건고사리는 수확, 건조 및 저장 중에 비위생적인 관리 둥에 의해 미생물의 중식 및 해충의 발생 등으로 품질이 크게 저하되어 저장상 많은 어려움을 안고 있다. 살균, 살충을 위한 방사선의 식품에의 이용은 그 건전성과 경제적 타당성이 인정되어 여러나라에서 실용화 되고 있다. 방사선 조사된 건고사리는 선행연구에서 재수화성이 증대되었고, 조리에 의한 연화시간이 단축되어 에너지 절감의 효과가 있었다. (중략)

• Cement
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• s.198
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• pp.25-43
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• 2013

1960년대 우리나라의 시멘트산업은 폐허가 된 국토에 재건의 씨앗이 뿌려지고 희망의 싹이 움터 자라나는 것과 궤를 같이하여 성장을 거듭해 나갔다. 정부의 공업화 정책이 진행됨에 따라 철도 발전시설 항만 하천 교량 수리시설 등 사회간접자본에 대한 투자가 급진전됐다. 다수의 공장이 건설됐고 시멘트의 수요는 매년 폭증했다. 1967년부터 시작된 제2차 경제개발계획 기간 중에는 도로, 항만 등 대규모 사회간접자본의 조성이 대폭적으로 늘어났다. 이런 상황에서 시멘트업계는 생산시설의 확장을 지속적으로 꾀해나가는 한편 업계 공동발전을 위한 해결책을 꾸준히 모색해 나갔다.

• The Science & Technology
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• v.32 no.7 s.362
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• pp.78-79
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• 1999

유전공학기법으로 산삼이나 가시오갈피 등 약재를 대량 생산할 수 있는 새로운 기술을 개발하고 있는 (주)마이크로프랜츠는 주목받는 벤처기업이다. 전주에 있는 이 기업은 생약제재의 종자에서 분리한 세포를 액체 배지에서 배양한 다음 증식된 세포들을 체세포배 발생 과정을 거친 결과 뿌리와 잎을 갖춘 유식물체(싹이 튼 식물체)를 얻는데 성공했다. 이러한 조직배양 방법은 완전 무공해 약재를 생산할 수 있고 6년 걸리는 자연재배를 3개월이며 생산할 수 있는 장점을 지니고 있다.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.90-95
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• 2002

벼농사의 노력과 비용을 최소화하기 위한 한 방법으로서 직파 기술이 이용되고 있으며 2001년 직파재배 면적은 건답직파 30,000㏊, 담수직파 42,800㏊로 담수직파 재배면적이 전체 직파재배 면적의 58%를 차지하고 있다. 담수 직파작업의 파종은 대부분 동력살분무기를 이용하고 있으나 파종균일도가 낮고 송풍에 의한 최아종자의 싹이 손상되는 문제에 의해 입모율이 떨어지는 문제점이 있다. (중략)