• 한국식품과학회지
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• 제32권4호
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• pp.936-941
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• 2000

검정콩을 이용하여 제조된 청국장의 기능적 특성을 평가하기 위하여 검정콩 청국장의 메탄올 추출물에 대한 몇가지 기초적인 생리활성과 발효중 phytoestrogen화합물(daidzein, genistein)의 함량변화를 조사하였다. 대두 청국장의 추출물은 대부분의 시험균주에 대하여 거의 항균활성이 없거나 약하게 나타났으나, 검정콩 청국장의 추출물은 시험균주 모두에서 항균활성을 나타내었다. 특히, 소립 검정콩의 청국장 추출물의 항균활성이 대립 검정콩보다 강하였다. 대립 및 소립 검정콩 청국장의 수소공여능은 각각 76.4및 75.5%로서 대두 청국장의 67.3%에 비하여 더 높게 나타났다. 또한 아질산염 소거능은 각 청국장 추출물에서 대조구에 비하여 모두 90%이상을 나타내었다. Linoleic acid에 대한 과산화물 및 흰쥐의 간 지질에 대한 TBA의 수치는 청국장의 추출물을 첨가한 시험구가 첨가하지 않은 대조구에 비하여 낮았으며, 그 항산화 효과는 소립 검정콩, 대립 검정콩 및 대두 청국장의 추출물 순이었다. Daidzein 및 genistein의 함량은 청국장 발효중 점진적으로 증가하였으며, 대두 청국장에 비하여 검정콩 청국장의 함량이 훨씬 높았고, 대립 검정콩이 소립 검정콩으로 제조한 청국장의 함량보다 높게 나타났다. 또한 genistein 함량은 대체로 daidzein 함량의 2배정도였다.

• International Journal of Industrial Entomology and Biomaterials
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• 제33권2호
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• pp.54-58
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• 2016

In natural conditions, the black soldier fly, Hermetia illucens (L.) (Diptera: Stratiomyidae), colonizes in warm temperate regions, and is active in Korea from May through October. Information on black soldier fly rearing, which is affected by seasonal factors in Korea, is limited. This species colonizes and oviposits in a wide variety of decomposing vegetable and animal matter. For mass rearing of black soldier flies, the egg deposition methods are dependent on sunlight and oviposition sites. In this study, we investigated the substrates and oviposition sites preferred by black soldier fly in artificial rearing system. Our results showed that as black soldier flies prefer mating under sunlight, they prefer ovipositing at sites where adequate sunlight and food substrate are available. Further detailed research is required to develop methods for artificially rearing black soldier fly throughout the year in Korea.

• 한국재료학회지
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• 제21권9호
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• pp.477-481
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• 2011

Composites of insulating polyethylene and carbon black are widely used in switching elements, conductive paint, and other applications due to the large gap of resistance value. This research addresses the critical exponent of dielectric breakdown strength of polymer matrix composites (PMC) made with carbon black and polyethylene below the percolation threshold (Pt) for the first time. Here, Pt means the volume fraction of carbon black of which the resistance of the PMC is transferred from its sharp decrease to gradual decrease in accordance with the increase of carbon-black-filled content. First, the Pt is determined based on the critical exponents of resistivity and relative permittivity. Although huge cohesive bodies of carbon black are formed in case of being less than the Pt, a percolation path connecting the conducting phases is not formed. The dielectric breakdown strength (Dbs) of the PMC below Pt is measured by using an impulse voltage in the range from 10 kV to 40 kV to avoid the effect of joule heating. Although the observed Dbs data seems to be well fitted to a straight line with a slope of 0.9 on a double logarithm of (Pt-$V_{CB}$) and Dbs, the least squares method gives a slope of 0.97 for the PMC. It has been found that finite carbon-black clusters play an important role in dielectric breakdown.

• 패션비즈니스
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• 제5권2호
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• pp.1-14
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• 2001

The purpose of this research is for confirming the aesthetics of 'little black dress' as one of the important items in contemporary women's fashion lives. Through the work, what is the aesthetic value that women really needed can be found. This research was processed by literal material with fashion photos, fashion books and articles which were related fashion trend from 1920 to 1990. The results are as follows ; The birth period of little black dress was 1920s to 1930s. Freedom and modernity was represented by little black dress. European elegance and American smartness were expressed on this item through 1950s to 1960s. In the end of 20th century, 'little black dress' has diversity just like fashion trend. As the aesthetics characteristics of little black dress, (1) contemporary woman's identity through chic and modernity (2) strong power of passing image (3) dual values of temptation and tatoo were found. Therefore this research can be useful to extent the meaning of little black dress in fashion study and to recognize contemporary women's needs.

• 한국재료학회지
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• 제19권12호
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• pp.644-648
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• 2009

Temperature dependency of resistivity of the carbon black-polyethylene composites below and above percolation threshold is studied based on the electrical conduction mechanism. Temperature coefficient of resistance of the composites below percolation threshold changed from minus to plus, increasing volume fraction of carbon black; this trend decreased with increasing volume fraction of carbon black. The temperature dependence of resistivity of the composites below percolation threshold can be explained with a tunneling conduction model by incorporating the effect of thermal expansion of the composites into a tunneling gap. Temperature coefficient of resistance of the composites above percolation threshold was positive and its absolute value increased with increasing volume fraction of carbon black. By assuming that the electrical conduction through percolating paths is a thermally activated process and by incorporating the effect of thermal expansion into the volume fraction of carbon black, the temperature dependency of the resistivity above percolation threshold has been well explained without violating the universal law of conductivity. The apparent activation energy is estimated to be 0.14 eV.

• Preventive Nutrition and Food Science
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• 제4권4호
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• pp.231-235
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• 1999

Three black rices(Suwon 415, Iksan 427 and Sanghaehyanghyeolla) harvested in Korea were examined in their pasting characteristics, and minor nutrients(vitamins and minerals) in comparison to those of a brown rice (Dongjinbyo), whereas Iksan 427 and Sanghaehyanghyeolla were waxy rices(0.4 and 0.6%, respectively). Iksan 427 and Sanghaehyanghyeolla showed similar viscosity pattern with significantly low pasting temperatures and viscosity. Brown rice showed higher pasting viscosity and pasting temperature than black rices, and its viscosity pattern was similar to Suwon 415. Brown rice and Suwon 415 displayed higher hardness but lower adhesiveness of their gels. Black rices contained more non-carbohydrate components and dietary fiber than brown rice. From the amino acid analysis, black rices contained more acid amino acids (aspartic and glutamic acids) than brown rice. Among the black rices, Suwon 415 had the highest content of total essential amino acids(4.3%). Black rices also contained higher amounts of vitamin B complexes (thiamin, riboflavin and niacin) and minerals(K, Mg and Ca) than brown rice. Sanghaehyanghyeolla showed an exceptionally high amount of Ca (12mg%).

• 헤리티지:역사와 과학
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• 제34권
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• pp.4-18
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• 2001

Paekche black potteries are earthenwares begun to be produced at the beginning of Paekche Dynasty, around 3-century. They have typical Paekche style. Representative Paekche earthenwares are burnished black pottery, long oval shaped pots and shoulder pots. Among these, burnished black potteries are limited to Paekche in the occurrence site and age. Their numbers are a few. To reproduce black pottery, their compositions were analyzed. As a result of X-Ray analysis, quarts, feldspar, illite, muscovite, and anorthite were found on their surfaces and imsides spinel and vermiculite were found on their surfaces. Since same constituent minerals were found on surfaces and their insides, special other materials were not added to make surface black. With the showing vermiculite, they were made higher than $800^{\circ}C$. As a result of analysis, fine grained clay bad been influenced by the black smoke. Its luster was appeared by polishing with a big flat wooden spoon. The black color was made of smoking when the hot pot taken off from burning oven was covered with the wet pine leaves.

• 한국식품조리과학회지
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• 제29권5호
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• pp.581-590
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• 2013

본 연구에서는 흑임자죽의 첨가비율과 제조방법을 기존의 흑임자죽 조리법(홍진숙 등 2003)을 바탕으로 여러 번의 예비실험을 통해 결정한 $100^{\circ}C$ 15분 볶음 처리한 흑임자를 대조군과 비교하여 항산화 활성을 평가하였고, 쌀은 통쌀이나 타갠 쌀이 아닌 쌀가루를 대신하여 찹쌀가루, 찹쌀현미가루, 찰흑미 가루를 넣고 흑임자의 첨가 비율은 예비실험을 통해 0, 30, 40, 50, 60%로 정하여 흑임자죽의 품질 특성을 측정하였다. 흑임자의 일반성분 분석 결과는 $100^{\circ}C$에서 15분 볶음 처리한 흑임자 시료는 수분 0.09%, 조지방 52.18%, 조회분 4.93%, 조단백 10.75%의 함량을 보였다. 생 흑임자 보다 $100^{\circ}C$에서 15분 볶음 처리한 흑임자 시료에서 모두 sesamin, sesamolin 함량이 높게 나타났고, Lecithin을 이용하여 TBARS를 측정한 결과 $100^{\circ}C$에서 15분 볶은 처리한 흑임자 시료가 기존 천연항산화제인 Tocopherol이나 sesamol 보다는 유의적으로 높은 활성을 보였고, Hydroxyl radical 소거능을 측정한 결과 90% 이상의 높은 소거능을 보였고, 천연항산화제인 sesamol 보다는 높은 소거 활성을 보였다. 지방산 조성을 분석한 결과 $100^{\circ}C$에서 15분 볶음 처리한 흑임자 시료에서 Linoleic acid의 함량이 높았고, Palmitic acid, Stearic acid, Arachidic acid, Oleic acid의 함량은 생 흑임자와 거의 차이가 없게 나타났다. Linolenic acid는 $100^{\circ}C$에서 15분 볶은 처리한 흑임자 시료에서만 측정되었다. 흑임자죽의 품질 특성 및 관능검사 결과 찹쌀, 찹쌀현미, 찰흑미 흑임자죽 제조 시 볶은 흑임자 시료를 50% 첨가하였을 때 전반적인 기호도가 유의적으로 높게 평가되었다. 이상의 결과로 볼 때 항산화성 및 전반적인 품질 면에서 볶은 흑임자 50% 첨가하였을 때 찹쌀, 찹쌀현미, 찰흑미 흑임자죽의 최적의 제조 방법으로 사료된다.

• 한국축산식품학회지
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• 제25권1호
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• pp.71-77
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• 2005

본 연구는 재래종 세절 돼지고기의 저장 중 품질 특성을 구명하기 위하여 개량종과 비교하여 실시하였다. 시험용 돼지고기로 240일간 사육된 평균체중 75 kg의 재래돼지와 210일간 사육된 평균체중 105 kg의 개량돼지를 이용하였다. 도축 후 세절돈육을 4℃에서 9일간 저장하며 실시하였다. 일반성분의 조성을 보면 재래종 돼지고기가 개량종에 비해 조지방과 조단백질 함량이 높고, 수분과 조회분 함량은 낮았다. 재래종 돼지고기의 pH가 개량종에 비해 저장 5일부터는 낮았고, 보수력은 저장기간 내내 유의적으로 높았다(p<0.05). 재래종 돼지고기는 명도가 낮고 적색도가 높아 개량종에 비해 검붉은 색깔을 지니고 있다. 저장기간이 늘어날수록 CIE L/sup */, a/sup */, b/sup */와 h/sup O/값들은 감소하는 경향을 보였다. TBARS, POV, FOX값 모두 저장기간이 증가할수록 유의적으로 증가하였으며 특히 재래종이 저장기간이 길어질수록 현저한 증가현상을 나타내었다. 재래종 돼지고기의 지방산 조성비율을 보면 총 포화지방산과 stearic acid 함량이 개량종에 비해 유의적으로 높았다(p<0.05).

• 천문학논총
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• 제18권1호
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• pp.15-20
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• 2003

In the earlier papers we analyzed the axisymmetric, nonstationary electrodynamics of the central black hole and a surrounding thin accretion disk in an active galactic nucleus. Based on those papers we analyze the axisymmetric, nonstationary black hole magnetosphere in this paper. We concentrate on deriving the ‘Grad-Shafranov equations’; both in the force-free and non-force-free cases. In the time-independent limit our equations naturally coincide with stationary equations as they should.