• Journal of Applied Biological Chemistry
• /
• 제53권2호
• /
• pp.87-90
• /
• 2010

This study consisted of a quantitative analysis of five phenolic ingredients in differently sized unripe apple extracts, and their tyrosinase inhibitory effects were examined. In the HPLC analysis of phenolic ingredients, small ($4{\pm}1\;g$ per one) unripe apple extracts were observed to have significantly higher quercetin content than larger ($8{\pm}1\;g$ per one) unripe apple and ripe apple extracts. The amount of catechin, epicatechin, p-coumaric acid and chlorogenic acid contents were similar in both the small and large unripe apple extracts. For the results of the tyrosinase assay, small unripe apple extracts provided a potent tyrosinase inhibitory effect, showing 89.2% at 1000 ppm. The tyrosinase inhibitory effects of large unripe apple and ripe apple extracts were weaker than those of the small unripe apple extract. These results suggest that the small unripe apple extract could be useful for de-pigmenting material, while quercetin could be responsible for the potent tyrosinase inhibitory properties of small unripe apple extracts.

• 원예과학기술지
• /
• 제28권4호
• /
• pp.552-560
• /
• 2010

$GA_{4+7}$+BA는 유목의 측지 발생 및 과실비대를 목표로 사용되는 생장조절제로써 본 실험에서는 밀식 과수원의 '갈라' 사과품종을 공시하여 4년 동안 여러 가지 살포방법을 이용하여 과실비대 및 영양생장에 미치는 영향을 조사하였다. $GA_{4+7}$+BA 처리시 과실 종경, 과중, L/D율은 증가되나 가용성 고형물 함량 및 산 함량, 엽면적, 엽록소함량 등은 변화가 일정하지 않았다. 과실 내 종자 수는 처리에 따른 차이가 없었으나 미발육 종자의 수가 증가하는 것으로 나타났다. 고농도 수관전체 살포는 신초생장을 증가시켰으나 착과 부위에만 살포시에는 영향이 없었다. 살포시기에 있어서는 과실 세포분열이 끝나는 시점인 5월말에서 6월초에 살포하는 것이 과실비대에 가장 효과적이었다. 그러나 고농도 $GA_{4+7}$+BA처리는 과실의 경도를 감소시켜 과실의 저장성을 떨어뜨리기 때문에 '갈라' 같은 소과종에 있어 고농도의 $GA_{4+7}$+BA 살포는 주의가 필요할 것으로 판단되었다.

• 한국식품저장유통학회지
• /
• 제30권1호
• /
• pp.78-87
• /
• 2023

본 연구는 소과종 '루비에스' 사과를 수확한 후 1-MCP를 0.5 및 1 µL/L의 농도로 처리한 다음 0℃에서 6개월간 저장하면서 과실품질을 조사하였다. 무처리 과실의 경도는 수확 시 85.4 N이었고, 저장 6개월 후에는 46.5 N으로 급격히 감소되었으나, 1-MCP 처리 과실들은 59.1와 59.5 N으로높은 경도를 보였다. 산 함량은 수확 시 0.42%에서 저장기간 동안 서서히 감소하여 저장 6개월 후 무처리 과실은 0.24%였으나 1-MCP 처리 과실들은 0.26와 0.27%로 높게 유지되었다. 그리고 가용성 고형물 함량은 차이가 없었고, 당산비는 1-MCP 처리 과실들이 무처리 과실과 비교하여 적은 변화율을 나타내었다. 에틸렌 발생량은 무처리 과실의 경우 저장 6개월 후 47.0 µL/kg/h로 급격히 증가하였으나, 1-MCP 처리 과실들은 1.4와 1.7 µL/kg/h로 매우 낮은 에틸렌 발생량을 보였다. 그리고 저장기간 동안 중량감소율은 처리 간 차이가 없었고, 저장 3개월 후부터는 3.0% 이상의 중량감소율을 보였다. 과피의 착색도는 양광면과 바탕색 모두 처리 간 차이를 보이지 않았다. 따라서 소과종 '루비에스' 사과의 저온저장 시 유통한계기는 무처리 과실은 2개월 정도로 판단되지만, 1-MCP 처리 과실은 중량감소율을 제외한다면 6개월까지도 가능할 것으로 판단되었다. 특히, 적정 1-MCP 처리농도는 0.5 µL/L가 효율적이라고 판단되었다.

• 유통과학연구
• /
• 제11권2호
• /
• pp.45-55
• /
• 2013

Purpose - The development and implementation of OSS (Open Source Software) led to a dramatic change in corporate IT infrastructure, from system server to smart phone, because the performance, reliability, and security functions of OSS are comparable to those of commercial software. Today, OSS has become an indispensable tool to cope with the competitive business environment and the constantly-evolving IT environment. However, the use of OSS is insufficient in small and medium-sized companies and software houses. This study examines the need for OSS Intermediaries in the Software Distribution Channel. It is expected that the role of the OSS Intermediary will be reduced with the improvement of the distribution process. The purpose of this research is to prove that OSS Intermediaries increase the efficiency of the software distribution market. Research design, Data, and Methodology - This study presents the analysis of data gathered online to determine the extent of the impact of the intermediaries on the OSS market. Data was collected using an online survey, conducted by building a personal search robot (web crawler). The survey period lasted 9 days during which a total of 233,021 data points were gathered from sourceforge.net and Apple's App store, the two most popular software intermediaries in the world. The data collected was analyzed using Google's Motion Chart. Results - The study found that, beginning 2006, the production of OSS in the Sourceforge.net increased rapidly across the board, but in the second half of 2009, it dropped sharply. There are many events that can explain this causality; however, we found an appropriate event to explain the effect. It was seen that during the same period of time, the monthly production of OSS in the App store was increasing quickly. The App store showed a contrasting trend to software production. Our follow-up analysis suggests that appropriate intermediaries like App store can enlarge the OSS market. The increase was caused by the appearance of B2C software intermediaries like App store. The results imply that OSS intermediaries can accelerate OSS software distribution, while development of a better online market is critical for corporate users. Conclusion - In this study, we analyzed 233,021 data points on the online software marketplace at Sourceforge.net. It indicates that OSS Intermediaries are needed in the software distribution market for its vitality. It is also critical that OSS intermediaries should satisfy certain qualifications to play a key role as market makers. This study has several interesting implications. One implication of this research is that the OSS intermediary should make an effort to create a complementary relationship between OSS and Proprietary Software. The second implication is that the OSS intermediary must possess a business model that shares the benefits with all the participants (developer, intermediary, and users).The third implication is that the intermediary provides an OSS of high quality like proprietary software with a high level of complexity. Thus, it is worthwhile to examine this study, which proves that the open source software intermediaries are essential in the software distribution channel.