• Journal of the Society of Cosmetic Scientists of Korea
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• v.31 no.3 s.52
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• pp.273-277
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• 2005

This study was performed to develop new cosmeceutical agents with sebosuppressive activity from native plant extracts in Korea. Inhibitory efforts of the extracts on $5{\alpha}-reductase$ (5-AR) were evaluated by enzyme kinetics analysis using UV-spectrophotometric method. Two kinds of enzyme suspensions as 5-AR sources were prepared from rat liver tissue and cultured hSG cells. The sebosuppressive effects were determined by measuring the total lipid quantity produced in cultured hSG cells after incubation with the extracts. As a result, Pinus thunbergii extracts showed the most potent 5-AR inhibitory effects. Its $K_i$ values were 0.0002% and 0.0014% for rat liver 5-AR and human sebaceous gland 5-AR, respectively. Addition of Pinus thunberii extract to hSG cells showed 48% reduction in total lipid production at 0.005% concentration. In conclusion, Pinus thunbergii extracts can be used as a cosmeceutical agent to regulate sebum production and to alleviate the sebum-involved skin diseases, such as acne and seborrheic dermatitis.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.4
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• pp.271-280
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• 2010

Ultraviolet radiation (UV) is a major cause of photodamages to human skin and the immediate responses of the skin to UV include the erythema and edema. In an attempt to find effective UV-protecting agents to be used in cosmetics, a number of plant extracts were screened in the cell-based assays. Among the total of 38 plant extracts tested, 3 plant extracts derived from Sasa quelpaertensis, Althaea rosea, and Dryopteris crassirhizoma attenuated the UVB-induced cytotoxicity as well as melanin synthesis in cultured human epidermal melanocytes. The anti-inflammatory effects of these plant extracts were further examined in animal models. A control or test cream containing 1% of a plant extract was topically applied to ears of a C57BL/6 mouse or the dorsal skin of a SKH-1 hafirless mouse before and after the exposure to UVB. The change in ear thickness or dorsal skin redness due to UVB exposure was determined to monitor edema and erythema, respectively. All three test creams exhibited anti-inflammatory effects in both experiments. The creams containing Sasa quelpaertensis, Althaea rosea or Dryopteris crassirhizoma extract alleviated the UVB-induced edema response on day 4 by 53.8 %, 56.4 % and 31.1 %, respectively. They also inhibited the erythema formation on day 2 by 45.7 %, 34.1 % and 20.5 %, respectively. This study suggests that the selected plant extracts formulated in cosmetics may attenuate skin inflammation caused by overexposure to UV.

• Korean Journal of Medicinal Crop Science
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• v.6 no.3
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• pp.181-187
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• 1998

This study was carried out to investigate the antioxidative activities of medicinal plants. Through the examination of methanol extracts from 30 species for radical scavenging effects using DPPH method, the extracts from Rhus javanica Linne, Smilax china Linne and Polygonum cuspidatum Siebold et Zucarinii showed strong antioxidative activity. Because of its highest antioxidative activity among 30 medicinal plants, radical scavenging effects of 4 different extract compartments (n- Hexane, EtOAc, BuOH and $H_2O$ extracts) from Galla Rhois MeOH extract of Rhus javanica Linne were examined by DPPH method and antioxidant effects on the 4 different extract compartments were tested by Ferric-Thiocyanate method. Antioxidative activities of n- Hexane, EtOAc and BuOH extracts were similar or even higher than that of natural (tocopherol) or synthetic antioxidants (BHA), suggesting that major fractions for the antioxidative activity of Rhus javanica Linne were the n- Hexane, EtOAc and BuOH extract compartments.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.50-50
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• 2018

본 연구는 국내 생육이 확인된 미기록 외래식물을 보고하고 그 특성을 기술하고자 한다. 가는잎가시상추(Lactuca saligna)는 국화과 다년생 초본이며 높이 10~65cm에 까지 자란다. 줄기에 난 잎은 피침형, 좁은피침형이며, 기부는 이저(耳底), 줄기를 반쯤 감싼다. 유라시아원산으로 지중해, 유럽온대까지 넓은 생육범위를 보인다. 한국에서는 부산, 울산 해안가 주변 공터에서 생육이 확인되었다. 부산, 울산 해안가 저지대를 중심으로 신속한 분포확산이 예상된다. 근연종인 가시상추의 국내 분포확산, 위해성 등을 고려할 때 가는잎가시상추에 대한 주의가 요구된다. 좀전동싸리(Melilotus indicus)는 해안 초지에 생육하는 일년초이며 높이 60cm까지 성장한다. 잎은 우상 3소엽, 소엽은 도란형~좁은도란형, 길이는 1~2.5cm이며 거치가 있다. 좀전동싸리는 국내생육하는 전동싸리와 매우 유사한 형태적 특성을 보인다. 좀전동싸리는 꽃의 길이 2~3mm 개화기는 4~5월이며, 전동싸리는 꽃의 길이 4~7mm 개화기는 7~11월로 차이를 보인다. 지중해, 유럽 남서부 원산으로 전세계적으로 온대 전역에 유입된 것으로 알려져 있다. 국내에서는 제주시 한림읍 옹포리 일대 해안가 저지대 공터 및 초지에서 생육이 확인되었다. 넓은 면적에서 분포하며 제주도에 정착된 것으로 판단된다. 나도뿔이삭풀은(Hainardia cylindrica) 해안 초지에 생육하는 일년초이며 높이 5~35cm까지 성장한다. 수상화서는 25cm에 이르며, 쇠뿔모양으로 단단하다. 소수는 화서 중축에 파인곳을 메우고 있으며, 길이 5~8mm 1개의 소화를 포함한다. 초형은 혁질이며 예두이다. 남아메리카원산으로 북아메리카, 호주 일본 등에 귀화되어 있다. 한국에서는 전라남도 완도군 신지면 신리 해안가 일대 공터 및 초지에 생육이 확인되었다. 나도뿔이삭풀속 Hainardia 은 국내 처음 보고되는 속이며, 뿔이삭풀과 유사한 형태적 특성으로 인해 국명을 신칭하였다.

• Korean journal of applied entomology
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• v.56 no.4
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• pp.427-434
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• 2017

The susceptibility of Dermanyssus gallinae adults, collected from poultry farms in 5 regions, to 11 acaricides was investigated. When bifenthrin and formic acid with pyridaben were diluted 100 times, bifenthrin showed 100% acaricidal activity; however, formic acid with pyridaben showed less than 20% acaricidal activity for poultry farms in 3 regions (Gyeongju, Chilgok, and Geumsan) except Yeoncheon and Anseong. The carbamate compound, carbaryl showed 100% acaricidal activity in most of the regions, except Gyeongju. A phosphorus compound, dichlorvos showed 100% activity in most of the regions, yet 66.7% acaricidal activity in Yeoncheon. The susceptibility of D. gallinae from poultry farms in Yeoncheon and Anseong to most acaricides was high; however, in the other farms, the susceptibility of D. gallinae varied depending on the acaricide. Clothianidin, thiamethoxam, fenitrothion, and formic acid with pyridaben showed differences in acaricidal activity among regions. Therefore, farmers should concentrate during the selection of these acaricides. However, carbaryl, cartap hydrochloride, dichlorvos, and bifenthrin showed high activity against D. gallinae collected from poultry farms in five regions. Therefore, these acaricides could be used in most of these regions. To control D. gallinae effectively, the alternation of acaricides is necessary, and indiscriminate pesticide use should be avoided. Therefore, this study can serve as a basis for controlling D. gallinae.

• Korean journal of applied entomology
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• v.59 no.3
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• pp.203-207
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• 2020

Monitoring about nine high risk insect pests, Aceria diospyri, Bactrocera dorsalis, Bactrocera minax, Bactrocera tsuneonis, Cydia pomonella, Lobesia botrana, Proeulia sp., Solenopsis invicta and Stephanitis takeyai, were carried out in seven regions from April to October in 2019. A total of 12,285 traps/visual scouting were investigated in 288 points of 87 local sites of seven regions, resulting the nine species, A. diospyri, B. dorsalis, B. minax, B. tsuneonis, C. pomonella, L. botrana, Proeulia sp., S. invicta, and S. takeyai, were not detected. This study have been carried out from 2018, and we established the nationwide monitoring system and secured a bridgehead for monitoring invasive insect pests passing the border.

• Food Science and Preservation
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• v.22 no.5
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• pp.690-698
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• 2015

Effects of roasting on physical (weight, volume, density and color) and chemical properties (total phenol, caffeine, chlorogenic acid and antioxidant properties) of three Arabica coffee beans (Brazil Bourbon, Indonesia Mandheling and Kenya Tatu) were investigated. A steady weight loss, volume increase, and bean density decrease were observed during the roasting process. The $L^*$, $a^*$, and $b^*$ values tended to decrease as the roasting temperature and time increased. Caffeine level was approximately 0.73% in green beans, and increased to 40-67% for darker roasts. Green beans contained the highest chlorogenic acid content, which decreased as the roasting temperature and time increased. The light- and medium-roasted coffee showed the highest total phenolol contents. The antioxidant activities were measured using DPPH and ABTS. The light-roasted coffee beans showed the highest antioxidant activities, and an approximately 36-51% loss in antioxidant activity was observed after further roasting. The flavor patterns of roasted coffee beans were analyzed using an electronic nose system based on gas chromatography. This analysis demonstrated that an electronic nose system can be applied to identify the green bean variety and the degree of roasting.

• Food Science and Preservation
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• v.23 no.7
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• pp.960-966
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• 2016

This study was conducted to explore the potential for use of atmospheric pressure dielectric barrier discharge plasma (atmospheric pressure DBD plasma) as a non-thermal sterilization technology for microorganisms in dried red pepper. The effects of key parameters such as power, exposure time and distance on the sterilization efficiency and the quality of red dried pepper by the atmospheric pressure DBD plasma treatment were investigated. The results revealed that the plasma treatment was very effective for sterilization of Staphylococcus aureus, with 15 min of treatment at 1.0 kW and 20 mm sterilizing 82.6% of the S. aureus. Increasing the power or exposure time and decreasing the exposure distance led to improved sterilization efficiency. The atmospheric pressure DBD plasma treatment showed no effect on the ASTA (American spice trade association) value or hardness of dried red pepper. Furthermore, no effects of atmospheric pressure DBD plasma treatment were observed on the sensory properties of dried red pepper. To assess the storage stability, the dried red pepper was treated with atmospheric pressure DBD plasma (1.5 kW power, 15 min exposure time and 10 mm exposure distance), then stored for 12 weeks at $25^{\circ}C$. Consequently, the ASTA value, hardness and capsaicin concentration of dried red pepper were maintained.

• The Journal of the Korean bone and joint tumor society
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• v.12 no.2
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• pp.112-117
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• 2006

Purpose: The purpose of this study was to investigate on primary bone tumors of fibula. Materials and Methods: Patients who received operative treatment from January 1993 to December 2005 for primary bone tumors of fibula were analyzed for clinical outcomes. Results: There were 17 patients(10 males, 7 females) who were diagnosed for primary bone tumors of fibula. Osteochondroma was the most common diagnosis and others were osteosarcoma, fibrous dysplasia. The malignant bone tumors were 10.5% of all fibula tumors. There were 12 cases on proximal, 4 cases on mid shaft, and 1 cases on distal part of fibula. At the final follow up, 14 patients reported patient satisfaction of either excellent or good. Conclusion: Bone tumor of fibula doesn't need reconstruction after the resection unless it invades tibia or its site distal, which enables easy surgical resection. However, generally it is rare and accompany with vague symptoms, so careful approach to diagnosis is necessary because late diagnosis can mean the needs for amputation.

• The Korean Journal of Pesticide Science
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• v.15 no.1
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• pp.15-21
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• 2011

Monitoring or follow-up surveying pesticide residues in agricultural commodities is the key to meet the international regulations and to enhance international competitiveness of Korean agricultural commodities. Six neonicotinoid insecticides, acctamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, and thiamethoxam were monitored in 95 paprika samples collected from Gyeongnam area. Thc pesticide residues were extracted by EN 15662 buffer based on the QuEChERS method, clean-upped with dispersive solid-phase extraction method to remove interfering pigments, and analyzed using UPLC-MS/MS. The neonicotinoid pesticides were detected in 90.5% of the paprika samples. Two or more pesticides were detected in 82.3% of samples. Although detection frequencies were high, all samples complied with the maximum residue limits (MRLs) set by both the Korea Food and Drug Administration (KFDA) and Japanese Ministry of Health, Labour and Welfare.