농업기술 - 겨울철 인기 만점 포인세티아 재배관리요령

장정희,Jang, Jeong-Hui 전국농업기술자협회 2009 농업기술회보 Vol.46 No.1

크리스마스를 상징하는 화려한 포인세티아는 겨울철의 대표적인 분화이다. 포인세티아 수요는 매년 괄목할 만한 성장을 하여 겨울 꽃시장의 주요 상품으로서 자리 매김을 하고 있지만 그동안 외국 품종에 대한 높은 로열티 지불로 화훼농가 경영에 큰 부담이 되었다. 농촌진흥청에서는 포인세티아 신품종을 육성, 보급하여 로열티 경감과 화훼농가의 안정적인 소득 증대를 위해 노력하고 있다. 포인세티아는 단일성 식물로 보통 자연일장이 줄어드는 10월부터 이듬해 3월 중순까지 꽃눈을 형성한다. 이 시기는 일장단축과 함께 온도도 영향을 미치며 일장조절에 의한 연중출하가 가능하다. 겨울철 출하를 목표로 재배중인 포인세티아는 적정 온도유지, 환기에 의한 습도관리, 병해충 방제 등 환경관리에 특별히 유의해야 한다.

일반강의식 수업에서 교수·학습 방법에 관한 연구

장정희,서종진,Jang, Cheong Hee,Seo, Jong Jin 한국학교수학회 2021 한국학교수학회논문집 Vol.24 No.3

과거에서 현재까지 교양 수학 수업에서 교육 환경의 변화를 추구하였으나 현재에도 대학 교육 여건으로 말미암아 일반강의식 수업이 이루어지고 있다. 이에 본 연구에서는 일반강의식 수업에서 학생들에게 도움이 되는 교수·학습 방법을 찾고자 하였다. 개별 과제와 피드백 및 수업 내용을 필기하는 방법이 동일 과제와 피드백을 제공하는 방법이나 동일 과제와 피드백 제공 및 수업 내용을 필기하도록 하는 방법보다는 학생들의 학습에 도움이 되는 것으로 나타났다.

ICP/MS를 이용한 축산물의 유해중금속 분석방법 및 숙련도 검증

장정희,김동규,권현정,임채미,손성완,김미경,Jang, Jung-Hee,Kim, Dong-Gyu,Kwon, Hyun-Jeong,Lim, Chae-Mi,Son, Seong-Wan,Kim, MeeKyung 대한수의학회 2012 대한수의학회지 Vol.52 No.2

The analytical method of trace toxic metals in livestock products was confirmed and validated through certified reference material (CRM) and the international proficiency tests. There are some difficulties to determine low levels of toxic metals in livestock products because of interferences due to the matrix. The recoveries of CRM (NIST 1577c) ranged from 73.9 to 119% for lead and from 86.4 to 111% for cadmium in bovine liver. The international proficiency tests were carried out with the milk powder and cocoa powder samples including metals provided by Food Analysis Performance Assessment Scheme (FAPAS$^{(R)}$, UK). The test samples were prepared by microwave digestion using solution of $HNO_3:H_2O_2:H_2O$ (v/v/v = 5 : 2 : 4) and analyzed by ICP/MS. The analytical result of cadmium in milk powder was $121{\mu}g/kg$ with -0.3 of the z-score compared to the assigned value of $131{\mu}g/kg$ by FAPAS$^{(R)}$. The analytical results of lead and cadmium in cocoa powder were $29.2{\mu}g/kg$ and $97.6{\mu}g/kg$, respectively, which satisfied the assigned values of $34.2{\mu}g/kg$ for lead and $126{\mu}g/kg$ for cadmium by FAPAS$^{(R)}$. It is verified that the analytical method is accurate and reliable to determine trace lead and cadmium in livestock products by microwave digestion and ICP/MS.

다공성 탄소층이 코팅된 하이브리드 표면 구조를 갖는 산소 환원 반응용 PtCo 합금 나노 촉매

장정희,모니카 샤르마,성후광,김순표,정남기,Jang, Jeonghee,Sharma, Monika,Sung, Hukwang,Kim, Sunpyo,Jung, Namgee 한국재료학회 2018 한국재료학회지 Vol.28 No.11

During a long-term operation of polymer electrolyte membrane fuel cells(PEMFCs), the fuel cell performance may degrade due to severe agglomeration and dissolution of metal nanoparticles in the cathode. To enhance the electrochemical durability of metal catalysts and to prevent the particle agglomeration in PEMFC operation, this paper proposes a hybrid catalyst structure composed of PtCo alloy nanoparticles encapsulated by porous carbon layers. In the hybrid catalyst structure, the dissolution and migration of PtCo nanoparticles can be effectively prevented by protective carbon shells. In addition, $O_2$ can properly penetrate the porous carbon layers and react on the active Pt surface, which ensures high catalytic activity for the oxygen reduction reaction. Although the hybrid catalyst has a much smaller active surface area due to the carbon encapsulation compared to a commercial Pt catalyst without a carbon layer, it has a much higher specific activity and significantly improved durability than the Pt catalyst. Therefore, it is expected that the designed hybrid catalyst concept will provide an interesting strategy for development of high-performance fuel cell catalysts.

과체중 소아의 부비동염에 대한 한방 치료 2례

장정희,박준홍,Jang, Jung-Hee,Park, Jun-Hong 대한한방안이비인후피부과학회 2016 한방안이비인후피부과학회지 Vol.29 No.2

Objectives : The purpose of this clinical study is to investigate effectiveness of oriental medical treatment for sinusitis in the two overweight children. Methods : This study was performed for two 5-years old of age and overweight (BMI>90th percentile) children with sinusitis who visited the clinic. The symptoms of sinusitis are rhinorrhea, poor sleep due to nasal congestion, cough, sputum. Oriental herb medicines(Kami-Hyunggyeyungyotang and Kami-Cheonggeumganghwatang), moxibustion, nebulizer and aroma nasal spray were treated to two children. The progress of treatment for sinusitis was evaluated through the subjective symptoms and endoscope inspection. Results & Conclusions : After oriental medical treatment, the subjective symptoms and endoscope inspection were improved in all two children. Our results suggested that oriental medical treatment have effective to alleviate the symptoms of sinusitis in overweight children.

2008-2009년 국내 폐사 야생조류 및 동물 체내의 잔류농약 분석

장정희,봉영훈,김동규,김미경,정갑수,손성완,Jang, Jung-Hee,Bong, Young-Hoon,Kim, Dong-Gyu,Kim, MeeKyung,Chung, Gab-Soo,Son, Seong-Wan 대한수의학회 2010 대한수의학회지 Vol.50 No.3

Pesticides are useful to eliminate harmful insects and grow crops however, misuse and abuse of pesticides may cause a death of wild birds, livestock, and companion animals. We analyzed residual pesticides in the ingesta and tissues from the dead wild birds, livestock, and companion animals which were suspected pesticide poisoning based on the diagnosis of the Animal Disease Diagnostic Center of National Veterinary Research and Quarantine Service (NVRQS). The samples were primarily brought to NVRQS from local communities and veterinary diagnostic laboratories. The 231 suspicious samples of pesticide poisoning based on the necropsy were analyzed by GC/NPD, GC/FPD, GC/ECD, or GC/MSD in 2008 and 2009. Pesticides were identified from the 55 samples of total 143 samples analyzed in 2008 and from the 34 samples of total 88 samples analyzed in 2009. The pesticide identification rates in 2008 were higher than the rates in 2009. It may have relevance to the increased samples with the outbreak of avian influenza in 2008 in Korea. The concentrations of pesticides found in the dead animals varied and exceeded the respective $LD_{50}$ of pesticides in many cases. Monochrotophos, phosphamidon, and methomyl were the most common pesticides found and those pesticides are high rank sales in Korea. The cause of pesticide poisoning in animal is assuming a misuse and an abuse of commonly used pesticides in Korea.

H₂O₂ 촉매 전환에 의해 생성된 건식산화제를 이용한 NO 산화에 관한 연구

장정희,한기보,Jang, Jung Hee,Han, Gi Bo 한국응용과학기술학회 2016 한국응용과학기술학회지 Vol.33 No.1

In this study, the NO oxidation using dry oxidant produced by catalytic $H_2O_2$ conversion was conducted. It was shown that Mn-based $Fe_2O_3$ support catalyst has the best performance in the catalytic $H_2O_2$ conversion and its combined-NO oxidation. The reaction characteristics of NO oxidation was investigated by the various operation conditions such as $H_2O_2$ amount, oxidation temperature and space velocity. As a results, the oxidation efficiency of NO greatly depends on the oxidation reaction temperature, $H_2O_2$ amount and space velocity. The performance of NO oxidation was increased with increasing the oxidation temperature and $H_2O_2$ amount. Also, the performance of NO oxidation was decreased with increasing the space velocity.

동물자원을 이용한 차세대 바이오연료 생산기술 가능성 고찰

장정희(Jung Hee Jang) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

관리형매립지의 식생지수를 활용한 식생관리방법

장정희(Junghee Jang),박장춘(Jangchun Park),고영일(Youngil Ko),송승현(Seunghyun Song),박희등(Heedeung Park) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

방정환과 어린이 문학·문화의 국제적 교류 -1920년대 『어린이』지를 중심으로-

장정희 ( Jang Jeung-hee ) 방정환연구소 2019 방정환연구 Vol.1 No.1

방정환(1899∼1931)은 한국의 어린이 문학과 어린이운동의 선구자이다. 그는 31세로 요절했지만, 동화, 어린이 잡지, 어린이 예술 분야에 큰 업적을 남겼다. 어린이날 제정(1922), 최초의 어린이 문제 연구 <색동회> 창립(1923), 『어린이』 잡지 창간(1923), 세계어린이예술전람회(1928) 개최 등이다. 20개국 어린이 예술 작품을 전시한 <세계어린이 예술전람회>는 어린이들에게 ‘예술을 통한 세계 평화의 정신’을 보여 주었다. 『어린이』지에는 “씩씩하고 참된 소년이 됩시다. 그리고 늘 서로 사랑하며 도와 갑시다”라는 표어가 실렸다. 방정환은 어린이들에게 정의, 용기, 유머에 대한 가치를 전하고자 했다. 불의에 대해서는 용기 있게 맞서 싸우는 한편, 서로 협력하며 정의를 이루도록 했다. 또 아무리 암울한 일제 식민지라 할지라도 『어린이』에 어린이들이 재미와 웃음을 잃지 않는 유익한 이야기를 많이 실었다. 어린이를 독자로 둔 ‘아동 잡지’, 1920년대 『어린이』는 동서양 어린이 문학과 문화번역의 수용, 교류사에 역할을 하였으며, 적지 않은 사회적 반향을 일으켰다. Bang, Jung-Hwan(1899∼1931) was a pioneer of children’s literature and children’s movement in KOREA. He passed away at the age of 31 years. But he did a lot of things for children such as writing fairy tales, publishing magazines, art exhibition and so on. < The 1^st Children’s Day >(1922), < SaekDongHoi >(1923), 『Eorini』(1923), < The World Children’s Art Exhibition >(1928). 『Eorini』include the following motto: “Let us be true and true boys. And let’s always love each other and help.” He has written about values of Justice, honesty, compassion, and faithfulness. And he did not overlook the importance of the element of ‘laughter’ in children’s literature. There are lots of funny stories in children ‘s magazines. Bang, Jung-Hwan wrote that ‘The world is a house’, ‘The world is connected to each other’, ‘The world affects each other.’ Bang, Jung-Hwan and < The World Children’s Art Exhibition > became the seed of the idea for “Peaceful Cooperation” of the world. He provided a hint to what we should do for children generation called ‘little giants’.