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쌍별귀뚜라미(Gryllus bimaculatus) 산란방법 및 알 저장조건
김성연,김도익,구희연,김정은,김현진,이유범,김지수,김호혁,한연수,김영철,Kim, Seong-Yeon,Kim, Do-Ik,Koo, Hui-Yeon,Kim, Jung-Eun,Kim, Hyun-Jin,Lee, Yu-Beom,Kim, Ji-Soo,Kim, Ho-Hyuk,Han, Yeon-Soo,Kim, Young-Cheol 한국응용곤충학회 2020 한국응용곤충학회지 Vol.59 No.2
2016년에 쌍별귀뚜라미는 식품의약품안전처 식품공전에 등록된 식품원료로 가장 큰 장점은 월동 없이 연중 대량 사육이 가능하다는 것과 60% 이상의 단백질 함량이다. 본 연구에서는 사육공간, 인건비 등의 문제로 인하여 귀뚜라미 사육이 불가능할 때를 대비하여 저장조건을 설정하였으며, 산란율이 높은 산란처 선발과 알의 동종포식률을 조사하였다. 산란은 상토 산란처에서 가장 선호도가 높았으며(p < 0.05), 알의 동종포식률을 보았을 때 10 L 당 종령 약충 62마리 이하, 1일 동안 산란을 받는 것이 가장 적합한 것으로 판단되었다(p < 0.05). 알의 저온 저장을 하였을 때는 28℃에서 10일간 보관 후 16℃에서 10일간 저온 저장했을 때 부화율이 가장 높았고, 저장을 하지 않았을 때와 비교하였을 때 12~14일 부화를 연장할 수 있었다(p < 0.05). 쌍별귀뚜라미의 산란처, 산란 방법 및 알 저장조건을 설정함으로써 효율적인 생산방법을 제시하였다. In 2016, the two-spotted cricket was approved as a general food ingredient by the Korean Ministry of Food and Drug Safety. Additionally, the two-spotted crickets have high protein content (60%) and can be reared throughout the year even during the overwintering period. In this study, storage conditions were set in case cricket breeding was not possible due to problems such as breeding space and labor costs, and selection oviposition mats to determine high fecundity rates and low cannibalism rates for the eggs were investigated. The oviposition mat was mostly composed of soil (p < 0.05). Less than 62 crickets per 10 litters were found to be best suited for 1 day of spawning, based on the cannibalism rate of the eggs during the egg laying period. The results from the hatched eggs indicated that the hatching extended 12 to 14 days, and the best hatching rate was approximately 85% when stored at low temperatures(16℃) for 10 days. An efficient production proposed method that established the best oviposition mat and egg storage method for the cricket.
Butylacrylate의 셀룰로오스 섬유에의 무촉매 Graft 중합 -제1보 Dioxane-물 混合용매중에서의 Graft 중합-
김성연,유효선,이영수,Kim, Seong-Yeon,Yu, Hyo-Seon,Lee, Yeong-Su 한국섬유공학회 1976 한국섬유공학회지 Vol.13 No.1
Graft polymerization of B. A. onto cellulose fabrics have been carried out in the mixed solution of dioxane and water in the absence of an initiator under nitrogen atmosphere. Some factors influencing the grafting have been studied and the properties of B.A. grafted rayon fabrics have been also observed, The results of this study are: B.A. is grafted onto rayon without difficult and weight increase attains up to 40%, but difficulty onto ramie and rarely onto cotton. Pre-treating with acidic solution promotes efficiency of grafting and the most favorite concentration is found to be 0.02-N HNO₃. The existence of water is an important factor for graft polymerization and the weight increase proportionally related with the amount of water in polymerization medium. The amount of grafting increases with increasing concentration of B.A. up to it's critical solubility in dioxance-water solvent. The weight increase is roughly proportional to reaction time at early stage, and becomes equilibrium over 8 hrs. for rayon and 4 hrs. for ramie. A little amount of homopolymer is produced with rayon, while large amount of homopolymer is produced with ramie at temperature over 60℃. It suggests that ramie has some factor initiate addition polymerizatin. The moisture regain of grafted rayon is decreased and the tensile stregth, elongation at break and abrasion resistance are increased with increasing weight gain.
항공기용 차폐 케이블의 구조에 따른 RTCA DO-160G Sec. 22 간접낙뢰 영향성 분석
김성연(Sung-Yeon Kim),김태현(Tae-Hyeon Kim),김민성(Min-Seong Kim),이왕상(Wang-Sang Lee) 항공우주시스템공학회 2023 항공우주시스템공학회지 Vol.17 No.6
In this paper, we analyze the influence of indirect lightning strikes based on the structure of shielded cables used in an aircraft and propose a cable structure to enhance shielding effectiveness. Cables in an aircraft account for the largest proportion among components and play a crucial role in connecting aircraft frames and electronic devices; thus, making them highly influential. In particular, indirect lightning strike noise can lead to malfunctions and cause damage in aircraft electronic equipment, making the utilization of shielded cables essential for mitigating damage caused by indirect lightning strike noise. We conducted an analysis of the impact of indirect lightning strikes on aircraft shielded cables considering factors, such as the presence of shielding layers, core, and insulation in the cable structure. Furthermore, we validated our findings through simulations and experiments by applying the internationally recognized standard for indirect lightning, RTCA DO-160G Sec. 22.