Toxicity of compounds identified in Cnidium officinale Rhizome to Bemisa tabaci (Hemiptera: Aleyrodidae)

Song-Hwa Chae,Soon-Il Kim,Si-Woo Lee,Young-Joon Ahn 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

The toxicity of materials derived from rhizome of Cnidium officinale Makino to adults from B and Q biotype of Bemisia tabaci was examined using a leaf-dipping bioassay. Results were compared with those of two currently used insecticides: acetamiprid and thiamethoxam. The active principles of C. officinale rhizome were identified as butylidenephthalide (1), ligustilide (2), and 3-butylphthalide (3) by spectroscopic analysis. These compounds exhibited 100% mortality against both B and Q biotype adults at 2.5 mg/ml. At a concentration of 1.25 mg/ml, butylidenephthalide produced 88 and 92% mortality against B and Q biotype adults, respectively. 3-butylphthalide showed 100 and 89% mortality against B and Q type adults, respectively. Ligustilide exhibited 97 and 100% mortality against B and Q type adults, respectively. The toxicity of these compounds to B type adults was almost equal to that of thiamethoxam and acetamiprid, whereas two insecticides exhibited 40% mortality to Q biotype. C. officinale rhizome-derived materials merit further study as potential insecticides for the control of B. tabaci populations due to global efforts to reduce the level of highly toxic synthetic pesticides.

Strategies of constructing the second phase eco-industrial parks in Korea

Song-Hwa Chae 한국환경경영학회 2010 한국환경경영학회 학술대회 Vol.2010 No.-

Adulticidal Activity of Phthalides Identified in <i>Cnidium officinale</i> Rhizome to B- and Q-Biotypes of <i>Bemisia tabaci</i>

Chae, Song-Hwa,Kim, Soon-Il,Yeon, Seong-Hum,Lee, Si-Woo,Ahn, Young-Joon American Chemical Society 2011 Journal of agricultural and food chemistry Vol.59 No.15

<P>The residual contact toxicity of three benzofuranoids (<I>Z</I>)-butylidenephthalide (<B>1</B>), (3<I>S</I>)-butylphthalide (<B>2</B>), and (<I>Z</I>)-ligustilide (<B>3</B>) identified in the rhizome of <I>Cnidium officinale</I> (Apiaceae) to B- and Q-biotype females of <I>Bemisia tabaci</I> was evaluated using a leaf-dip bioassay. Results were compared with those of eight conventional insecticides. Based on 24 h LC<SUB>50</SUB> values, (<I>Z</I>)-butylidenephthalide (254 ppm) and (<I>Z</I>)-ligustilide (268 ppm) were more toxic than (3<I>S</I>)-butylphthalide (339 ppm) against B-biotype females, whereas (<I>Z</I>)-ligustilide (254 ppm) and (3<I>S</I>)-butylphthalide (338 ppm) were more toxic than (<I>Z</I>)-butylidenephthalide (586 ppm) against Q-biotype females. Thiamethoxam, imidacloprid, and acetamiprid differ significantly in toxicity between the B- and Q-biotype females (LC<SUB>50</SUB>, 1.7 to 11.6 vs 364.5 to >3000 ppm). This original finding indicates that the phthalides and the neonicotinoids do not share a common mode of action or elicit cross-resistance. Structure–activity relationship indicates that the presence of conjugation rather than aromaticity appeared to play an important role for phthalide toxicities to the B-biotype females. Global efforts to reduce the level of highly toxic synthetic insecticides in the agricultural environment justify further studies on <I>C. officinale</I> rhizome-derived materials as potential insecticides for the control of <I>B. tabaci</I> populations.</P>

High-throughput screening of DeNOx catalyst using artificial neural networks

Song Hwa Chae,Sang Hun Kim,Sunwon Park 제어로봇시스템학회 2006 제어로봇시스템학회 국제학술대회 논문집 Vol.2006 No.10

Toxicity of melissa and savory essential oil constituents against Bemisia tabaci

Song-Hwa Chae,Jun-Ran Kim,Sang-Gyeu Lee,Soon-Il Kim,Young-Joon Ahn 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.10

The toxicity of melissa and savory essential oil constituents against adult Bemisia tabaci was examined using vapor-phase toxicity bioassay. Results were compared with those following the treatment with currently used insecticide dichlorvos. As judged by 24 h LC50 values, thymol (0.59×10-3 mg/cm3) was the most toxic constituent, followed by cavacrol (0.60×10-3 mg/cm3). These compounds were slightly less toxic than dichlorvos (LC50, 0.20×10-3 mg/cm3). Strong activity was also obtained from borneol (LC50, 1.06×10-3 mg/cm3), α-terpineol (1.22×10-3 mg/cm3), geraniol (1.23×10-3 mg/cm3), linalool (1.33×10-3 mg/cm3), lavendulol (1.44×10-3 mg/cm3), nerol (1.52×10-3 mg/cm3), β-citronellol (1.81×10-3 mg/cm3), terpinene-4-ol (1.87×10-3 mg/cm3), 1-octen-3-ol (2.06×10-3 mg/cm3), and citral (2.34×10-3 mg/cm3). The melissa and savory essential oil-derived compounds, particularly thymol and carvacrol, merit further study as potential insecticides for the control of B. tabaci.

상업용 드론 투자 현황 분석

채송화(Chae Song Hwa),김현중(Kim Hyoun-joong) 한국통신학회 2016 한국통신학회 학술대회논문집 Vol.2016 No.6

추천석사논문 : 『을병연행록』과 여성 독자

채송화 ( Song Hwa Chae ) 민족문학사학회·민족문학사연구소 2014 민족문학사연구 Vol.55 No.-

이 논문은 담헌 홍대용의 한글 연행록인 『을병연행록』을 여성 독자와 관련하여 분석하고, 이를 통해 『연기』를 비롯한 담헌의 다른 한문 연행 기록들과는 상이한 특징들을 해명함으로써 그 독자적 가치를 부각하는 것을 목적으로 한다. 『을병연행록』은 홍대용이 자신의 집안 여성들을 위해 집필했으며, 그가 남긴 여러 연행 기록들 중 비교적 초기에 완성된 것으로 추정된다. 홍대용은 『을병연행록』에서 중국 여성들의 일상을 포착하여 조선 여성 독자들의 관심사를 부각시켰다. 물론 여성의 부덕을 강조한 대목들에서 그의 보수적인 여성관이 드러나 있기는 하지만, 홍대용이 관찰 대상에 중국 여성들을 포함하고 여성들의 주요 관심사를 집중적으로 다룬 점은 독특한 의의가 있다. 또한 자신의 중국 견문 내용을 여성 독자들에게 효과적으로 전달하기 위해 다양한 글쓰기 방식들을 구사하여 높은 문예성을 성취하였다. 여성들의 관심사와 직결되는 중국 문물들을 상세하게 묘사했으며, 낯선 용어나 한시 등에는 해설을 덧붙이고, 학술적인 내용은 축소하기도 했다. 다음으로는 소설적인 기법을 적극적으로 구사하여 중국 여행 체험을 생생하게 재현하고자 했다. 이는 홍대용이 『수호전』 등 중국 소설에 대한 조예를 갖추었기 때문에 가능한 것이었다. 『을병연행록』을 비롯한 한글 연행록은 조선 후기에 여성 독자들의 주요 독서물이었으므로 여성문학적 관점에서 분석하는 작업이 필요하다고 본다. This study aims for the analysis of a travelogue, Eul-Byeong-Yonhaengrok(乙丙燕行錄) by Hong Dae-yong(洪大容, 1731~1783), writing under the pen name of Damheon(湛軒) from the view point of the relationship with female readers. Especially the analysis focuses on unraveling and identifying the uniqueness of this travelogue, as compared to his other travelogues, such as Yon-Gi(燕記). Eul-Byeong-Yonhaengrok, -estimated as one of his early works, was written for his female family members. In the travelogue, Hong Dae-yong stimulated an interest of female readers’-in Joseon(朝鮮), by describing a daily life of females in China. Even though a conservative view against female, womanly virtue in partic-460 ular, is found, it is a distinctive difference that he observed and wrote about Chinese females and their major interest. In addition, he achieved his own literary creativeness to effectively deliever what he experienced and observed in China to female readers in Korea through various writing styles. He described the Chinese products, of women’s interest in depth, annotated Chinese poem and difficult vocabulary, and cut down academic content. He also used the novelistic techniques to lively visualize his travel experience to China. His profound erudition of the Chinese novel, as Shui-Hu-Zhuan (水滸傳) made it possible. I think that the analysis of travelogues on China written in Korean needs to be performed in womens’ view point because travel essays written in Korean including Eul-Byeong-Yonhaengrok were the major reading matters for females in the late Joseon dynasty.

피드백 제공방식과 강화 경험이 품질관리 수행에 미치는 효과

채송화(Song-Hwa Chae),오세진(She-Zeen Oah) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.9

본 연구의 목적은 상이한 피드백 제공방식과 피드백 제공자와 수용자 간의 강화경험이 품질관리 수행에 미치는 영향을 검증하는 것이었다. C 대학 및 대학원의 재학생 100명을 대상으로 실험을 수행하였다. 본 연구에서는 컴퓨터를 사용하여 상품을 생산하는 가상의 휴대폰 조립과제를 사용하였다. 본 연구의 독립변인은 두 가지의 피드백 제공방식(면대면과 이메일)과 강화경험의 유무였으며, 종속변인으로는 참가자들의 수행 정확도를 측정하였다. 2X2 집단 간 설계가 적용되었으며 실험은 총 4회기로써 사전회기 1회기와 실험회기 3회기로 각 회기는 30분으로 구성되었다. 연구 결과 강화경험을 가지고 있는 경우 두 가지 피드백의 품질관리 정확도 향상 효과가 유사하게 나타났으나 강화경험이 없는 경우에는 면대면 피드백이 품질관리 정확도 향상에 더 효과적인 것으로 나타났다. 이러한 결과를 통해 두 가지 피드백 제공방식과 피드백 제공자와 수용자 간의 강화경험에 따라 수행에 미치는 피드백의 효과가 달라질 수 있음을 알 수 있다. This study examined the relative effects of different feedback delivery method (face-to-face vs. e-mail) and reinforcement history on work performance. Participants were asked to work on a simulated mobile phone assembly task. They performed for 30 minutes per session and attended 4 sessions. The dependents variable was the percentage of correctly completed work tasks. Of 100 participants recruited, 50 had a reinforcement history and another 50 had no reinforcement history with the feedback provider in this study. The participants in each group were randomly assigned into two experimental conditions: face-to-face feedback and e-mail feedback. The results showed that for the participants who had reinforcement history, the two feedback delivery methods did not produce a significant difference in the percentage of correctly completed work tasks. However, for those who had no reinforcement history, the two feedback methods did produce a significant difference.

IOPI 기기를 이용한 구강안면근 훈련이 마비말장애가 있는 급성기 뇌졸중 환자의 조음체계에 미치는 효과: 예비연구

채송화(Song Hwa Chae),정환윤(Hwan Yoon Jeong),김지희(Ji Hee Kim) 한국장애인재활협회 2021 재활복지 Vol.25 No.3

연구는 급성기 뇌졸중으로 인한 마비말장애가 있는 환자에게 IOPI 기기를 적용한 구강안면근 훈련이 마비말장애의 조음체계 변화에 미치는 영향을 알아보기 위한 예비연구로 시행하였다. 연구대상자는 연구 조건이 충족되는 급성기 뇌졸중 환자 14명으로 IOPI 기기를 이용한 구강안면근 훈련을 한 실험군 7명과 설압자를 이용한 구강안면근 훈련을 한 대조군 7명으로 진행하였다. 사전평가 후 3주 동안 구강안면근 훈련을 시행하고 사후평가를 통해 두 군을 비교하였다. 본 연구결과 IOPI 기기를 이용한 집단이 조음기관의 기능과 총점에서 유의한 향상을 보였다(p<.05). 또한 IOPI 기기를 이용한 집단이 /퍼/와 /커/의 반복운동속도, /퍼터커/의 일련운동속도에서 유의한 향상을 보였다(p<.05). 마지막으로 모음의 포먼트를 비교한 결과 IOPI 기기를 이용한 집단이 /아/의 F1, F2, /우/의 F2에서 유의한 변화를 보였다(p<.05). 이는, IOPI 기기를 이용한 구강안면근 훈련이 마비말장애 환자의 조음치료에 효과적인 중재방안이 될 수 있으며 이를 위한 후속연구가 필요하다는 것을 시사한다. This study was conducted to pilot study to investigate the effect of oral facial muscle training using IOPI device on the change of articulation system of dysarthria in patients with dysarthria due to acute stroke. The subjects of the study were 14 acute stroke patients who met the study conditions and 7 subjects in the experimental group who trained the oral facial muscles using the IOPI device and 7 subjects in the control group who trained the oral facial muscles using the tongue depressor. Oral facial muscle training was performed for 3 weeks after pre evaluation and the 2 groups were compared through post evaluation. As a result of this study the group using the IOPI device showed significant improvement in the function and total score of the oro-motor mechanism (p<.05). In addition the group using the IOPI device showed a significant improvement in the alternation motion rate of /pʌ/, /kʌ/ and sequential motion rate of /pʌtʌkʌ/ (p<0.5). Finally as a result of comparing the formant of the vowels, the group using the IOPI device showed significant changes in F1, F2 of /a/, F2 of /u/ (p<.05). This suggests that oral facial muscle training using an IOPI device can be effective intervention method for articulation treatment of patients with dysarthria and follow-up studies are need.

상업용 드론의 기회와 위험요소 분석

채송화(Chae Song Hwa),홍승표(정보통신기술진흥센터) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.06