Molecular genetic analysis of the Hoplolaiminae and prediction of secondary structure using D2 and D3 expansion segments of 28S gene of rRNA

Chang‐Hwan Bae 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.05

The subfamily Hoplolaiminae included economically important plant parasitic nematodes and consisted of more than 400 species, all having the diagnostic characters of a strongly annulated cuticle and a large stylet. Among the Hoplolaiminae genera, the genus Hoplolaimus species include species such as H. columbus, and H. galeatus that cause serious damage to crops and turf grass in the Southeastern United States. Traditional identification of species has been approached by interspecific variation of phenotypic traits that rely on morphological and morphometric characters. However, these taxonomic criteria are sometimes not practical because of their limited ability to discriminate species among closely related groups due to overlapping of important taxonomic characters. The exact species identification is needed to control target nematode and also quarantine. Therefore, genetic studies for development of molecular diagnostics, population biology, and disease management are required. In recent years, many molecular diagnostic methods have been used for the identification of plant parasitic nematodes. Advanced molecular techniques have been used that test traditional identification methods. In our studies, Hoplolaimus species showed that high genetic divergence in rDNA sequence is combined with low morphological diversity. Based on genetic information, we developed multiplex PCR for H. columbus, H. galeatus, and H. magnistylus and successfully amplified mixed populations. In molecular phylogeny, the subfamily Hoplolaiminae is an important out‐group of the Heteroderidae, a notorious plant parasite nematode group. Molecular phylogeny of the Hoplolaiminae will help us understand of pathways of pathogenesis. In our phylogenetic analysis using D2 and D3 expansion segments of 28S gene, the molecular data supported morphological based taxonomic schemes. To reconstruct more reliable phylogenetic analysis, correct assignment of each nucleotide within multiple sequence alignment is an important step. Sequence alignments based on secondary structure have been proposed as new alternative methods to obtain this goal. We predicted the secondary structure of D2 and D3 domain using computational predictions method such as the minimization energy method and comparative sequence analysis (co‐variation). Predicted secondary structure included 18 species with two outgroup species, Globodera rostochiensis, Rotylenchulus reniformis. Consensus secondary structure was obtained from closely related and distantly related species. Phylogenetically informative characters were distributed in the stem region (86.7%). These results support the effectiveness of stem and loop regions for phylogenetic analysis of the Hoplolaiminae.

카드뮴 측적량과 붕어(Carassius auratus) 아가미 조직 변화의 상관성에 관한 연구

배희경,김은경,남성숙,문창규,전성환,나진균,박광식 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.1

Histopathological changes and cadmium accumulations in the gills were investigated in crucian carp (Carassius auratus) exposed to 0, 0.01, 0.1, 0.5 mg/l cadmium (Cd)concentrations for 25 days. After 25 days of exposure, cadmium accumulations increased in each of the different exposure concentrations. Histopathological changes in the gills of curcian carp exposed to cadmium included the acidification of mucous cell, the terminal clubbing of lamellae, the hyperplasia of epitherial cell and the curved of secondary lamellae. The similar histopathological changes were observed once the accumulations of cadmium reached the similar levels found in the present study with the different exposure schemes. Also the acidification of mucous cell in gills appeared when cadmium accumulations reached 5 ㎍/g and more. These results suggested that histopathological changes in the gills, an appearance of mucous cell acidification, be used to estimate the relation between toxic effect and cadmium accumulations in the gills.

중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화

서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops

온도변화에 따른 파이버 브래그 격자 필터의 특성에 관한 연구

손용환(Yong-Hwan Son),이종윤(Jong-Youn Lee),허주옥(Ju-ok Huh),배창환(Chang-Hwan Bae),정진호(Jin-Ho Jung) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

In this paper, we present thermal characteristics of a fiber Bragg grating(FBG) filter, including peak reflectivity and FWHM bandwidth by various refractive index change. The reflection spectrum of a FBG filter with refractive index change is affected by its thermal stability.

조기 천장골염의 자기공명영상 소견

김태환 ( Tae Hwan Kim ),전재범 ( Jae Bum Jun ),심승철 ( Seung Cheol Shim ),장대국 ( Dae Kook Chang ),고회관 ( Hee Kwan Koh ),정성수 ( Sung Soo Jung ),이인홍 ( In Hong Lee ),배상철 ( Sang Cheol Bae ),유대현 ( Dae Hyun Yoo ),전의용 대한류마티스학회 1998 대한류마티스학회지 Vol.5 No.2

목적: 천장골염의 유무가 척추 관절염의 진단에 중요한데 단순 골반 검사에서 변화가 없는 환자를 대상으로 MRI를 이용하여 천장골염의 조기변화 소견 및 MRI방법에 따른 장점을 비교하고자 하였다. 대상 및 방법: 단순 골반 검사에서 천장골염 유무가 확실하게 구분되지 않은 혈청 음성 척추 관절염 환자 26명을 대상으로 MRI를 시행하고 염증의 주침범위치를 천측과 장측, 관절의 상하로 구분하고, MRI방법에 따른 변화를 비교하였다. 결과: 모든 예에서 조영 증강되는 판누스를 관찰할 수 있었고, Grade I 이하에서는 장골측과 관절하부, 인대성 관절보다 활막성 관절을 더 많이 침범하였다. Grade II 이상에서도 장골측과 관절 하부에 더 많았으나 인대성 관절을 Grade I이하에서보다 더 많이 침범하였다. 관절 주변 지방 침착역시 장골측과 관절 하부에 더 주로 침범하였고 Grade II 이상에서 약간 더 많았다. 관절 주변 골염은 Grade 0에서는 없었고, Grade I에서는 주로 장골측과 관절 하부에서 92%가 양성이었고, Grade II에서는 93%에서, Grade III에서는 64%에서 양성으로, 장골측을 주로 침범하였으나 관절 상하부의 구분은 없었다. 인대성 천장골 관절은 Grade I 이하에서 38%, II 이상에서는 94%에서 침범하였다. 관절 주변 골염과 지방 침착, 그리고 판누스의 관찰에는 MPGR보다 스핀에코 영상이 좋았고, 관절면의 불규칙성 또는 관절강의 확대와 관절 강직여부의 관찰에는 스핀에코에 비해 MPGR 영상이 좋았고, 연골하 경화는 비슷하였다. 천장골염의 정도와 ESR, CRP와의 연관성은 없었다. 걸론: 천장골 관절에서 염증의 시작은 주로 장골 측과 관절의 하부에서 먼저 시작되고, 관절이 진행될수록 장골측에서 천골측까지로 범위가 확대 되었다. MRI방법에 의한 차이로 초기단계에는 스핀에코 영상이 관절염을 확인하는데 도움이 되고 관절면이 불규칙하게 되고 경화가 되어 병이 진행된 상태에서는 MPGR영상이 진단에 더 도움이 되었다. 염증성 배부 동통이 있는 경우 단순 골반 검사에서 이상이 없는 환자인 경우에도 MRI 검사를 시행하여 천장골염의 유무를 확인하는 것이 중요하다. Objective: The early detection of sacroiliitis on X-ray is important to diagnose spondyloarthropathy(SpA). The conventional radiography, bone scan, and computer tomogram have the problems of sensitivity, specificity, and side effects. We examined sacroiliitis using MR imaging in patients who had inflammatory back pain, but no definite changes in conventional radiogrphy. Other radiologic techniques were compared in detection of early sacroillitis. Methods: Twenty six patients with SpA were examined. The MRI findings of both sacroiliac joints were evaluated in every patients, such as pannus, periarticular osteitis and fat accumulation, subchondral sclerosis, and joint space changes(irregularity, ankylosis). Also we analyzed the changes of sacroiliac joints in sacroiliitis. Results: The predominant sites of involvement were upper aspect and iliac surface of sacroiliac joint in subchondral sclerosis, lower and iliac in pannus, periarticular fat accumulation, and iliac in periarticular osteitis. The MPGR images were superior to spin echo images in evaluation of joint space changes(irregularity, and ankylosis). Conclusions: Sacroiliitis is initiated in iliac side and lower portion of sacroiliac joints. MRI can detect early changes of sacroiliitis in patients with no conventional radiographic changes. MRI seems to be needed in patients with inflammatory back pain.

기후변화와 키메라현상에 대한 계층 간의 관계인식

백정애(Jungae Baik),김인경(In Kyoung Kim),김진영(Jin Yung Kim),노용환(Yong Hwan Noh),배선영(Sunyoung Bae),우명원(Myoung Won Woo),장혁기(Hyukki Chang),조성돈(Sung Don Cho),장매희(Maehee Chiang) 인간식물환경학회 2011 인간식물환경학회지 Vol.14 No.3

This study was investigated to research the basis of interdisciplinary fusion through the survey on the basis of the answers of professionals and general public, gender, humanities, science and engineering about the question of climate change and chimera which is one of the various phenomena that affect the human life. All respondents’ perceptions of climate change was high and natural disasters was showed the most destruction according to climate change. The answer of awareness of climate change and the damage, chimerism was significant differences between age groups sex, specialized domain-specific individuals. In addition, a group of respondents for science and engineering professionals was higher for awareness of climate change and the chimerism and heir negative opinion for chimerism was relatively low in comparison of other research groups.

前腕部 經穴 取穴에서 骨度分寸法과 一夫法의 比較 硏究

박히준,채윤병,차웅석,박종배,이혜정,이향숙,인창식,고형균,김수영,최일환,김강식,문정배,배기태,유경환,육근영,정병주,손인철,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

Background : The cun measurement System, an essential and convenient method in locating acupoints, has been widely used in the practice of acupuncture. However, traditional cun measurement has been criticized for its lack of reliability. Objectives : The purposes of this study are to determine if one cun measured by the directional methods have a consistency with that of proportional methods and to investigate which factors are related with these differences, especially in forearm. Methods : The distance between the elbow crease and the wrist crease of forearm was compared to a reference value of one cun obtained by the directional method. In this method, one cun is one third of the distance between index finger and Small finger of a subject, measured at proximal interphalangeal joint. In addition, to investigate the factors influencing the differences between these two methods, we measured the height and body weight and calculated body mass index (BMI). Finally we analyzed the factors correlated with these lengths by linear regression test. Results : The results showed that one cun obtained by the directional methods were significantly different from one cun by the proportional methods in forearm. It was demonstrated that the length acquired with the directional method was more correlated with body weight and body mass index, while the length obtained by the proportional method was more correlated with the height.

Development of vitrification protocol in Rubia akane (nakai) hairy roots using a systematic approach.

Park, Sang-Un,Kong, Hyunjung,Shin, Dong-Jin,Bae, Chang-Hwan,Lee, Sheong-Chun,Bae, Chang-Hyu,Rha, Eui-Shik,Kim, Haeng-Hoon Royal Veterinary College 2014 Cryo letters Vol.35 No.2

<P>A solution-based vitrification protocol is a process of sequentially changing-solutions from which both influx of cryoprotectants (loading) and efflux of water (dehydration) were accomplished before cryo-exposure. Hence, we need to properly control the concentration /composition of the cryoprotectant solutions.</P>

對時變動慣性系인 航空機의 縱의 動安定解析 : 第1報, Mass Parameter Vector의 導入 1st Report, Method of Analysis due to the introduced Mass Parameter Vector

裵昌煥 연세대학교 산업기술연구소 1974 논문집 Vol.5 No.1

One of the problems in practical applications of the dynamic stability characteristics and flying qualifications and adaptive controls of aircraft is to vary the mass, components of inertia tensor and C.G. position in fore and aft. However, the effects due to such variations are only considered in the problems of design and control of aircraft, partially. Therefore, in this study, 1). Mass parameter vector ??⊂Ω(its apreciable domain composed of every parameters) to correspond their time-varying elements was newly defind, and then introduced into the equations of motion. 2). The result of root locus solution to the time-varying longitudinal characteristics equation was represented to be able to consider a locus of ??: a set of roots ⊂?: root space as a set of images due to the mapping of ??. 3). Also, the result of a calculation for the example airplane was discussed on the basis of above analytical method.

對時變動慣性系인 航空機의 運動方程式

裵昌煥 연세대학교 대학원 1974 延世論叢 Vol.11 No.1

In this investigation, the non-linear equations of motion are formulated on the basis of the Euler's equations of motion for aircraft under the conditions of so-called "the time-varying mass parameters" which the mass, the components of inertia tensor and the center of gravity for aircraft are specified to be varied with time. And then, they were discussed on the effects due to the mechanisms of separation of consummed manses, and also modified throughout the simplification of the equations of Motion. Finally, according to analize of the dynamic stability in this case, it was represented to be able to develope by the numerical analysis method due to parametric change of its parameters. Consequently, above method is useful in engineering design and control problems for new aircraft.