Gryllus bimaculatus is one of many cricket species known as field crickets. Also known as the African or Mediterranean field cricket or as the two-spotted cricket, it can be discriminated from other Gryllus species by the two dot-like marks on the base of its wings. G.bimaculatus is a subtropical insect and widely distributed from Africa to south Asia. After into the country, The species are popular for use as a food source for insectivorous animals like spiders and reptiles kept as pets. In 2016, G.bimaculatus was approved as a general food ingredient by Korean Ministry of Food and Drug Safety. However, domestic research on G.bimaculatus is still in its study is beginning stages. G.bimaculatus is possible species to year-round rearing without storage condition. but The aim of the present study prepares for in case of problems such as breeding space, labor cost etc. In the laboratory condition at 28±2℃ and 50% relative humidity under 10h light, 12h dark photoperiod, Adult crickets oviposit at soaked flower foam for 24 hours. The experiment on the hatching of the eggs showed that eggs could be stocked at 16℃ for 10 days with 7 day pre-period after laying, representing 85% hatchability.

A commercial egg parasitoid, Trichogramma sp. Nabis101, was released into agricultural cultivating areas in Korea due to its wide host spectrum against insect pests. Moreover, an application technique has been recently developed to enhance its control efficacy by mixture treatment with a microbial control agent. Despite its expansion of commercial availability, any genetic identification on this commercial strain was not determined. Also, to meet inconsistent demands from consumers, the live parasitoids need to be stored without significant loss of their survival and parasitic activity. This study determined nucleotide sequence of internal transcribed spacer (ITS) of the wasp species. The identified ITS sequences indicate that this wasp species is most similar to T. brasiliensis. Optimal storage condition of this wasp required young parasitized stage at 10℃. Under these conditions, survival, sex ratio, longevity, and parasitic behavior were not much impaired for 5 weeks.

In this study, we examined the effects of egg yolk powder added to flour dough on the lipid oxidation of fried products during storage. The flour dough containing the egg yolk powder (0, 5, and 10%) was fried in sunflower oil at 180℃ for 90 sec. The fried products were then stored at 60℃ for 9 days in the dark. The lipid oxidation of the fried products was evaluated by fatty acid composition, peroxide values (POV), conjugated dienoic acid (CDA) contents, and thiobarbituric acid (TBA) values. The color and phospholipids (PL) contents of the fried products were also determined by colorimetry and high performance liquid chromatography, respectively. The addition of egg yolk powder to the dough decreased the POV, CDA contents, and TBA values of the fried products during storage. Although POV, CDA contents, and TBA values significantly increased in the products without egg yolk powder during storage, little change was observed in the products with egg yolk powder. The PL contents remained relatively constant in the fried products added with egg yolk powder during storage. The lightness and greenness of the fried products decreased, and the yellowness increased, as the storage time increased. The results clearly indicate that the addition of egg yolk powder to the dough improved the lipid oxidative stabiliy of the fried products during storage in the dark, and the PL in the egg yolk might have contributed to the improvements in lipid oxidative stability.

폐기되고 있는 난각을 건조(80℃) 및 회화(1,000℃) 처리하여 칼슘 소재화하고 이의 농도(0.5, 1.0, 2.0%)를 달리하여 절단배추에 처리하여 polyethylene(PE) 지퍼백에 넣어 5℃에서 6주 동안 저장하면서 선도유지 효과를 조사하였다. 난각 칼슘 소재의 칼슘 함량은 회화처리(ESP-2)가 건조처리(ESP-1)보다 2배 가량 높은 값(51.86%)을 나타내었다. 난각 칼슘 소재는 citric acid 수용액에서 높은 용해도를 나타내었으며, ESP-2가 ESP-1보다 용해도가 높았다. 절단배추의 이화학적 품질특성의 측정 결과, ESP-2 0.5% 처리구에서 중량감소율, 적정산도, 가용성 고형분 및 색차의 변화가 가장 적게 나타났다(p<0.05). 저장기간에 따른 관능평가결과 각 처리구의 유의적인 차이는 나타나지 않았다(p<0.05). ESP-2 0.5% 처리는 절단배추의 단기 저장 시 선도유지에 효과적인 것으로 사료된다.

본 연구의 목적은, 녹차의 급여가 스트레스 하에 있는 산란계가 생산한 계란의 저장성에 미치는 영향을 조사하는 것이다. 특히 농장에서 계란의 출하와 시장에서 계란이 유통되는 기간을 고려하여 산란 후 1주 그리고 5주에 계란의 품질변화를 조사하였다. 하이라인 브라운 레그혼 산란계를 3개의 처리구로 나누고, 녹차가 0.0, 0.4 및 1.0% 첨가된 사료를 2주 동안, 그 후 이들 각각의 사료에 kg 당 corticosterone 30 mg의 첨가 또는 무첨가 사료를 1 주 동안 급여하였다. 급여 5~7일에 채란된 계란을 냉장 보관하였고, 그 후 1주 및 5주째에 계란의 품질을 평가하기 위하여 난중, 난각색, 난각강도, 난황색, 난각두께, 난각무게 난백높이 및 호유니트(Haugh unit)가 측정되었다. 저장 1주째에 녹차는 난중을 증가시켰고(p<0.025) corticosterone은 난중을 감소시켰지만(p<0.0001), 녹차는 이러한 난중 감소에 영향을 미치지 않았다. Corticosterone에 의해 난각색은 유의적으로 감소된 반면(p<0.0001), 녹차는 난각강도를 유의적으로 감소시켰다(p<0.006). 그러나 난황색, 농후난백고 및 HU는 두 처리의 영향을 받지 않았다. Corticosterone의 처리로 5주간의 저장기간 동안 난중(p<0.01)과 난각색(p<0.001)은 감소되었고 난각강도는 높아졌지만(p<0.035), 녹차가 이러한 영향을 변화시키지는 못했고 녹차 그 자체의 효과도 나타나지 않았다. 본 연구의 결과, 녹차의 급여는 계란의 저장기간이 단기간인 경우 난중의 저하를 지연시키는데 기여하지만 저장기간이 길어질 경우 녹차의 효과는 인정되지 않는 것으로 사료된다.