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Inter-industry Spillover of R&D, Technological Opportunities, and Productivity Growth
Somi Seong 서울대학교 경제연구소 1995 Seoul journal of economics Vol.8 No.1
This paper attempts to examine the empirical significance of the technological opportunities and spillover effects in the relationship between industrial R&D and productivity growth. Estimation results are in favor of the general hypothesis that a given level of investment in knowledge stock will have a greater effect in industries with relatively rich technological opportunities. However, The explicit consideration of the spillover effects does not lead to a significant improvement in estimation results. Analytically, as Scherer(1982) argues, spillover effects should play an important role in explaining output elasticity. but the results of empirical tests in this paper suggest that the information in the spillover effects is embodied in its own R&D.
성소미(Seong SoMi) 한국토지공법학회 2007 土地公法硏究 Vol.36 No.-
Recently, a bill requesting introduction of new ways of housing supply for the purpose of providing low-priced houses was submitted to the National Assembly. This is the very discussion on introduction of land lease housing and repurchase housing.<BR> With the way of land lease housing, public sector rents out land area of houses, and those who possess a house for installment sale have ownership only for building area. By leasing land area, this system makes it possible not only to provide housing consumers with apartments at half price but also to prevent windfall income resulted from value increase in land values.<BR> On the other hand, repurchase housing method restricts housing consumers in doing free transactions of selling the houses if they want to do by making them resell to public institution, the subject of housing supply. Through repurchasing houses by subject of supply, this method aims to prevent gaining possession caused by difference of market conditions repurchasing<BR> In the meantime, in spite of having developed constant policies to decrease sale in lots such as a sale in lots price upper limit system and sale in lots prime cost opening to the public, house price has risen steadily and real estate market has been unstable continuously.<BR> Providing people with houses for installment sale under these two systems, lease and repurchasing housing, has a significant meaning in terms of alleviating the common people"s burden on housing expenses by supplementing reduction policy of sale in lots and preventing real estate speculation.<BR> However, it may be difficult for people to accept these two supply ways that have restrictions on entire ownership and disposal of property right under such dominant understanding that a house means "ownership" not "residence". Other than this, there are more aspects that need to be investigated prior to the final decision of employing these two systems. For example, securing building land to construct housing as per new supply systems, planning financial resources, and so forth.<BR> This thesis is a basic study as to introduction of new systems of housing supply and aims to analyze each pont at issue on the basis of the bill submitted to the National Assembly. Besides, I would like to insist that introduction of new systems has to be preceded by substantial analysis and thorough examination, expecting that the current discussion on new systems would be sincere consideration on real estate policy not a political issue.
고소미(Somi Koh),김해섭(Hae-Seop Kim),조영철(Young-Chul Cho),강성국(Seong-Gook Kang),김정목(Jeong-Mok Kim) 한국식품영양과학회 2009 한국식품영양과학회지 Vol.38 No.6
전복의 대량 양산 체제에서 전복을 활용도를 높이기 위하여 다양한 형태의 전복 가공품 개발이 필요하다. 본 연구에서는 전복을 생전복, 구운전복, 증숙전복의 형태로 전처리하고 얇게 슬라이스를 한 후 이를 고추장과 함께(1:3 w/w) 섞어 제조한 후 20℃에서 숙성시키면서 각각의 이화학적 특성을 조사하였다. 제조된 생전복, 구운전복, 증숙전복을 첨가한 고추장을 1일 숙성 후, 고추장에서만의 수분(43%)은 각각 57.9%, 53.7%, 50.8%로 증가하였고, 2주후에는 모든 제품에서 수분함량이 약 53~54%에 도달하였다. 고추장의 색도는 밝기에 해당하는 L-값과 적색도인 a-값, 황색도인 b-값 모두 점진적으로 증가하였다. 고추장 숙성전복제품의 초기 일반미생물은 고추장에서 각각 5.74, 5.70, 5.83 log CFU/g로 검출되었고, 숙성 28일후에는 0.28, 0.30, 0.11 log CFU/g 정도만 증가하였다. 고추장 숙성 증숙전복에서 전복육의 산도는 숙성이 진행됨에 따라 pH의 저하와 함께 14일째는 5.40으로 최대치를 보인 후 점차 감소하였다. 원료인 생전복, 구운 전복, 증숙전복육의 초기 휘발성염기질소는 각각 약 1.4 ㎎%, 0.9 ㎎%, 2.7 ㎎%로 나타났으나, 고추장전복을 제조하여 숙성 1일 후에 전복에서는 각각 14.0 ㎎%, 13.8 ㎎%, 11.6 ㎎% 나타났다. 숙성 8일 후 전복육의 휘발성염기질소는 각각 15.5 ㎎%, 13.3 ㎎%, 11.3 ㎎%로 보통 선도의 어육에 해당되는 값을 나타내었고, 증숙전복육이 가장 낮은 값을 보여주었다. 결과적으로 고추장전복을 제조할 때 전처리 가공방법은 증숙전복이 가장 효과적이었다. The physicochemical characteristics of abalone meat aged in Kochujang at 20℃ were studied. Moisture contents of Kochujang, which contained raw, roasted, and steamed abalone, increased to 14.9, 10.7, and 7.8%, respectively, compared to control at day 1. The moisture contents of all products were equilibrated at 53.5% approximately after 2 weeks. Hunter's L, a, and b values increased in all products. Total microbial counts were 5.74, 5.70, and 5.83 log CFU/g in the products and increased to 0.28, 0.30, 0.11 log CFU/g, respectively, after 28 days storage at 20℃. After 8 days, the pH in the steamed abalone meat decreased gradually from 5.48 to 5.16 and the titratable acidity was the highest at day 14. Volatile base nitrogens of raw, roast, and steamed abalone were 1.4, 0.9, and 2.7 ㎎%, but the values in the Kochujang products were 14.0, 13.8, and 11.6 ㎎% at day 1, and 15.5, 13.3 and 11.3 ㎎% at day 8, respectively. Quality of the product prepared with steamed abalone was the most acceptable by sensory evaluation.
Anti-leukemic effects of PPARγ ligands
Ryu, Somi,Kim, Dae Seong,Lee, Myoung Woo,Lee, Ji Won,Sung, Ki Woong,Koo, Hong Hoe,Yoo, Keon Hee Elsevier 2018 Cancer letters Vol.418 No.-
<P><B>Abstract</B></P> <P>The peroxisome proliferator-activated receptor (PPAR) γ, a subtype of PPARs, is a member of the nuclear receptor family. PPARγ and its ligands contribute to various types of diseases including cancer. Given that currently developed therapies against leukemia are not very effective or safe, PPARγ ligands have been shown to be a new class of compounds with the potential to treat hematologic malignancies, particularly leukemia. The capability of PPARγ ligands to induce apoptosis, inhibit proliferation, and promote differentiation of leukemia cells suggests it has significant potential as a drug against leukemia. However, the specific mechanisms and molecules involved are not well-understood, although a number of PPARγ ligands with anti-leukemic effects have been identified. This may explain why PPARγ ligands have not been widely evaluated in clinical trials. To fill the gaps in the lack of understanding of specific anti-leukemic processes of PPARγ ligands and further adapt these molecules as anti-leukemic agents, this review describes previous studies of the anti-leukemic effects of PPARγ ligands.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PPARγ ligands show a variety of anti-leukemia effects (e.g., inducing apoptosis). </LI> <LI> With other compounds, PPARγ ligands possess enhanced anti-leukemia activities. </LI> <LI> PPARγ ligands are particularly promising as anti-leukemic agents. </LI> </UL> </P>
Isolation of Anticancer Compounds from Peucedanum japonicum Thunb. Roots
Jun, Neung Jae,Kim, Seong-Cheol,Song, Eun-Young,Jang, Ki Chang,Lee, Dong Sun,Cho, Somi K. The Plant Resources Society of Korea 2014 한국자원식물학회지 Vol.27 No.3
This study was conducted to isolate a compound with anticancer properties from the roots of Peucedanum japonicum Thunb. (Umbelliferae), and to evaluate the efficacy of that compound's anticancer activity. The $CHCl_3$ layer was purified via repeated column chromatography and recrystallization. The two compounds isolated from $CHCl_3$ layer were identified via NMR spectroscopic analysis as (10E) 1,10-heptadecadiene-4,6-diyne-3,8,9-triol (Comp. I) and anomalin (Comp. II). (10E) 1,10-heptadecadiene-4,6-diyne-3,8,9-triol was the first report from the roots of P. japonicum. MTT assays were conducted to evaluate the in vitro cytotoxic activities of Compounds I and II against the following human cancer cell lines: HeLa, HepG2, SNU-16, and AGS. Comp. I evidenced the most profound cytotoxic activity against HepG2 cells ($IC_{50}=6.04{\mu}g/mL$), and Comp. II exhibited the most profound cytotoxic activity against SNU-16 cells ($IC_{50}=18.24{\mu}g/mL$) among the human cancer cell lines tested in this study. However, no significant cell death was observed in the CCD-25Lu human normal lung fibroblast cells. Quantitative analysis using UPLC (Ultra Performance Liquid Chromatography) showed that the roots of P. japonicum contained 0.015 (Comp. I) and 1.69 mg/g (Comp. II) of these compounds.
The field application and test of insect pollinators in 5 fruit and vegetable crops
Kyeong Yong Lee,Hee Chul Lee,Somi Lee,Jeonghyeon Lim,Sun-young Lee,Young Uk Park,Young Bo Lee,Heeji Kim,Su-bae Kim,Bosun Park,Sujin Lee,Kyu-Won Kwak,Seong Hyun Min,Dong Hee Lee 한국응용곤충학회 2024 한국응용곤충학회 학술대회논문집 Vol.2024 No.04
국내 원예작물에서 화분매개곤충의 의존도는 해마다 증가하고 있다. 우리는 사과, 딸기 등 화분매개곤충의 의존도가 높은 주요 과수와 시설작물에 대하여 화분매개곤충의 사용기술을 개발하고 이를 현장에 적용하는 연구를 수행하고 있다. 2021년부터 2022년까지 딸기, 키위 등 5가지 주요 농작물에서 화분매개벌을 적용한 결과, 딸기에서 뒤영벌의 적용결과 기존 꿀벌과 통계적으로 같은 수준의 화분매개효과를 나타내었으며, 하우스에서 농약적용시 하우스 밖으로 벌통을 위치시키는 것이 방치보다 벌의 소실을 20% 더 감소시킬 수 있었다. 인공수분 에 의존하고 있는 씨없는 수박에서 수분수 식재와 꿀벌을 이용함으로 기존 벌 방사보다 16% 착과율을 향상시킬 수 있었다. 시설고추에서 꿀벌과 뒤영벌의 혼합사용시 기존 꿀벌 방사보다 고추 수량이 10% 향상되었고, 토마토 에서 660㎡당 뒤영벌의 봉군량을 1.5배 증가시 토마토 수량은 4.4% 향상되었다. 키위는 꿀벌로 기존의 인공수분 을 충분히 대체할 수 있었고, 인건비가 60%이상 절감되었다. 또한 현재 시판중인 30종의 살충제와 27종의 살균제 에 대하여 24시간내 반수치사를 보인 농약은 각각 살충제 6종와 살균제 4종 이었다. 이어서 2023년부터 참외, 멜론, 사과, 단감에 대한 현장적용연구가 진행되고 있다.