• 제목/요약/키워드: Disease progress

검색결과 712건 처리시간 0.023초

배추 순무모자이크바이러스(TuMV)병 진전도 예측모형식 작성 (Modeling for Prediction of the Turnip Mosaic Virus (TuMV) Progress of Chinese Cabbage)

  • 안재훈;함영일
    • 한국식물병리학회지
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    • 제14권2호
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    • pp.150-156
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    • 1998
  • To develop a model for prediction of turnip mosaic virus(TuMV) disease progress of Chinese cabbage based on weather information and number of TuMV vector aphids trapped in Taegwallyeong alpine area, data were statistically processed together. As the variables influenced on TuMV disease progress, cumulative portion(CPT) above 13$^{\circ}C$ in daily average temperature was the most significant, and solar radiation, duration of sunshine, vector aphids and cumulative temperature above $0^{\circ}C$ were significant. When logistic model and Gompertz model were compared by detemining goodness of fit for TuMV disease progress using CPT as independent variable, regression coefficient was higher in the logistic model than in the Gompertz model. Epidemic parameters, apparent infection rate and initial value of logistic model, were estimated by examining the relationship between disease proportion linearized by logit transformation equation, In(Y/Yf-Y) and CPT. Models able to describe the progression of TuMV disease were formulated in Y=100/(1+128.4 exp(-0.013.CPT.(-1(1/(1+66.7.exp(-0.11.day). Calculated disease progress from the model was in good agreement with investigated actual disease progress showing high significance of the coefficient of determination with 0.710.

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유묘 뿌리썩음병 진전에 따른 이산재배 토양의 유별 (Grouping the Ginseng Field Soil Based on the Development of Root Rot of Ginseng Seedlings)

  • 박규진;박은우;정후섭
    • 한국식물병리학회지
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    • 제13권1호
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    • pp.37-45
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    • 1997
  • Disease incidence (DI), pre-emergence damping-off (PDO), days until the first symptom appeared (DUS), disease progress curve (DPC), and area under disease progress curve (AUDPC) were investigated in vivo after sowing ginseng seeds in each of 37 ginseng-cultivated soils which were sampled from 4 regions in Korea. Non linear fitting parameters, A, B, K and M, were estimated from the Richards' function, one of the disease progress models, by using the DI at each day from the bioassay. Inter- and intra-relationships between disease variables and stand-missing rate (SMR) in fields were investigated by using the simple correlation analysis. Disease variables of the root rot were divided into two groups: variables related to disease incidence, e.g., DI, AUDPC and A parameter, and variables related to disease progress, e.g., B, K and M parameters. DI, AUDPC, and DUS had significant correlations with SMR in ginseng fields, and then it showed that the disease development in vivo corresponded with that in fields. Soil samples could be separated into 3 and 4 groups, respectively, on the basis of the principal component 1 (PC1) and the principal component 2 (PC2), which were derived from the principal component analysis (PCA) of Richards' parameters, A, B, K and M. PC1 accounted for B, K and M parameters, and PC2 accounted for A parameter.

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대두잎의 성숙도가 갈색무늬병의 진전에 미치는 영향 (EFFECTS OF LEAF MATURITY ON THE DISEASE PROGRESS OF SEPTORIA BROWN SPOT IN SOYBEAN)

  • 오정행
    • 한국식물병리학회지
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    • 제3권4호
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    • pp.285-290
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    • 1987
  • 대두 갈색무늬병의 진전은 한 식물체에서 상위엽으로의 진전속도(수직감염율 : vertical progress)과 밀접한 관계가 있다. 실제로 포장에서의 갈색무늬병 진전은 주로 하위엽에서 발병하기 시작하여 상위엽에 비하여 이병정도가 높은 것이 보통이다. 이러한 현상의 원인을 구명하기 위하여 수행한 본 실험에서 갈색무늬병의 감염율은 잎의 성숙도와 정의 상관을 보였으며 이러한 유엽저항성은 접종원의 분포와는 무관한 것으로 보였다. 또 상위엽의 엽표면일출액 (leaf diffusate)은 병원균 포자발아 및 관계신장의 억제 정도가 하위엽의 일출액에 비하여 높았으며 이러한 경향은 저항성품종에서 더욱 현저하여 엽일출액의 어떤 발아억제물질이 갈색무늬병의 유엽저항성에 관여하는 것으로 추정되었다.

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유기농 감자재배지에서 감자역병에 의한 병 진전 및 수량감소 (Disease Progress and Yield Loss of Potato Late Blight Caused by Pntytophthora Infestans in Organic Farming Fields)

  • 류경열;지형진;최두회;천정욱;김종태;김병섭
    • 식물병연구
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    • 제11권2호
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    • pp.122-127
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    • 2005
  • Late blight of potato caused by Phtophthora infestans is one of the most destructive disease in organic farming as well as in the conventional cultivation in Korea. Incidence and progress of the disease largely depend on climatic conditions around the fields. However, the disease completely destroys whole leaves of the plant within two weeks in organic farming fields. While, potato leaves in conventional farming fields remain healthy for 5 weeks after the first symptom appearance, because fungicides were applied four times in average to control the disease. Area under disease progress curve (AUDPC) of organic farming fields ranged from 2314 to 2421 and quickly expanded compare to that of conventional farming fields. The tuber yield in the organic farming fields ranged from 0.96 ton per 10a to 1.5 ton per 10a, while it was 2.7 ton per 10a in conventional farming fields. Tuber yields were reduced to $42\~63\%$ by the infection of late blight and the reduction rate was closely related with the time of first occurrence of the disease in organic farming fields. Physiological races of the pathogen were diversified with R0,1,3,4,5,7,10,11 in organic farming fields at Hongchun area. Pathogen races were distributed with similar pattern at different areas of organic farming fields.

Biochemical Changes in Sorghum Leaves Infected with Leaf Spot Pathogen, Drechslera sorghicola

  • Khan, A.J.;Deadman, M.L.;Al-Maqbali, Y.M.;Al-Sabahi, J.;Srikandakumar, A.;Rizvi, S.G.
    • The Plant Pathology Journal
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    • 제17권6호
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    • pp.342-346
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    • 2001
  • The physiological changes in sorghum (Sorghum vulgare Pers.) leaves infected with Drechslera sorghicola were investigated through five recognizable stages of disease development. Water-soaked yellowish brown spots developed two days after inoculation, turned brown with yellow halo, enlarged and coalesced at later stages of disease development. Healthy and infected leaves were analyzed for different biochemical constituents. The chlorophyll contents were decreased significantly with the progress of infection. The levels of reducing and total sugars increased while non-reducing sugars decreased to a significant extent with the progress of disease. The concentration of total phenolics, orthodihydroxy phenols, free and glycosidic phenols showed significant changes due to infection, whereas basic and acid phenols showed little or no change with disease development. Levels of phenolic compounds increased four days after inoculation and decrease thereafter, but the concentration was higher at every stage of disease development relative to healthy tissues. Polyphenol oxidase and peroxidase enzyme activities increased to varying degrees at different stages of infection. Analysis of protein fractions showed a significant increase with the progress of disease.

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"온병조변(溫病條辨)"에 나타난 맥진(脈診) 연구(硏究) (A Study of Pulse Diagnosis in "Onbyeongjobyeon(溫病條辨)")

  • 권정현;백유상
    • 대한한의학원전학회지
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    • 제23권3호
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    • pp.23-48
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    • 2010
  • Onbyeong(溫病) is called an acute epidemic febrile disease caused by warm pathogen, a major symptom of Onbyeong is high fever. Doctrine of Onbyeong is a study of an occurrence, progress and treatments of an acute epidemic febrile disease. Doctrine of Onbyeong is valid in the Cheong Dynasty at China. Now, a theory of doctrine of Onbyeong at China and Korea is being applied in not only an acute febrile disease but also many other lifestyle diseases. Onbyeongjobyeon is a book written by Oguktong(吳鞠通). Oguktong was influenced by Jangjung-gyeong(張仲景) "Sanghanron(傷寒論)". Oguktong had organized Seopcheonsa(葉天士)'s medical thoughts and Oguktong's medical experiences. A Samcho(三焦) deteriorated case is divided into three groups - Upper, Middle and Lower-energizer - that is discussed of a vertical progress of Onbyeong. And a Wigiyeonghyeol(衛氣營血) deteriorated case is divided into four groups - Wi, Gi, Yeong and Hyeol - that is discussed of a horizontal progress of Onbyeong. In Korean medicine, there are four types of diagnosis which are watching, listening, asking and taking. Informations, got by four types diagnosis are synthesized and classified for medical treatments. A pulse diagnosis belongs to a method by taking a wrist among four diagnosis. A Korean Medicine doctor makes a conclusion of cause, region and condition of disease by taking a pulse. Because all organs in human body are connected by a meridian system. organs conditions are reflected in a meridian system. So by taking a pulse, a progress and a prognosis of disease is diagnosed In this thesis, by taking a pulse on "Onbyeongjobyeon(溫病條辨)", a location and a feature of disease's cause with weakness and strength of a vital force are examined, and a character of a pulse diagnosis of Onbyeong is examined.

인공 고관절시술자환자의 중심동요 특성에 관한 연구 (Investigation of postural sway characteristics of patients after total hip replacement)

  • 강창수;신승헌;민병우
    • 대한인간공학회지
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    • 제14권2호
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    • pp.87-104
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    • 1995
  • This research investigates the possibility of using the postural sway of patients as a reference for measruing the progress of the disease and healing of patients who received total hip replacement; the progress of the disease by X-ray pictures, the pain felt by the patients, and the difficulties encountered in moving the joints. The measurements on the force platform were taken during a 25 second period standing on both feet and during a 5 second period standing on one foot with both eyes open. The result of the research showed that the trace and area of the overall length of postural sway was a good indicator which represented the healing progress of the patients who received total hip replacement, and the weakening of the muscles and the recovery process for 3 or 4 month after receiving the operation, which did not appear on X-ray pictures, were exhibited on the postural sway. Finally, standing on a single foot represented the healing progress much better than standing on both feet.

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Caucher 환자의 효소 대치요법에 따른 Chititriosidase 활성도 변화 (Change of Chitotriosidase activity in Gaucher Patients by Enzyme Replacement Therapy)

  • 유한욱;임대성;양송현
    • 대한유전성대사질환학회지
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    • 제6권1호
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    • pp.58-62
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    • 2006
  • Gaucher disease is an inherited disorder due to a deficiency in the activity of glucocerebrosidase (EC. 3.2.1.45) by genetic mutation which resulted from missense, nonsense, frameshift, deletion in long arm 21 of chromosome 1 (1q21). Gaucher disease is classified into the main three types as type 1 (nonneuronopathic), type 2 (acute neuronopathic) and type 3 (subacute neuronopathic) according to the progressive phase of manifestations and nervous system involvement. Gaucher disease patients had been treated by using the method as splenectomy and bone marrow transplantation. But enzyme replacement therapy as a more effective treatment has been available since the early 1990's. In order to treat Gaucher disease efficiently by using ERT, it is necessary to chase the progress of the therapy. In this study, therefore, we tried to chase the progress of the ERT by using the measurement of chitotriosidase activity in Gaucher disease patients.

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대두(大豆)갈색무늬병의 병진전(病進展)과 품종간저항성(品種間抵抗性) 검정(檢定) (Evaluation of Septoria Brown Spot Disease and the Disease Resistance in Soybean Cultivars)

  • 오정행
    • 한국응용곤충학회지
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    • 제24권2호
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    • pp.103-106
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    • 1985
  • 대두(大豆) 갈색무늬병에 대한 저항성(抵抗性)의 포장검정(圃場檢定)에 적합한 생육시기(生育時期)를 결정하고 수집재래종(蒐集在來種)으로부터 저항성인자원(抵抗性因子源)을 찾기 위 하여 본실험(本實驗)을 수행하였던 바, 1. 갈색무늬병에 대한 저항성(抵抗性) 품종간(品種間)에 차이(差異)가 현저하였으며 수직감염율(垂直感染率)과 병반면적율간(病斑面積率間)에는 상관(相關)이 있었다. 2. 병반면적율(病斑面積率)과 병진전곡선면적(病進展曲線面積)과의 상관도(相關度)는 대두(大豆) 생육기중(生育期中) 개화기(開花期)에서 가장 높아 포장에서의 저항성 검정시기는 개화기(開花期)가 적당한 것으로 보였다. 3. 수집재래종(蒐集在來種) 1,428계통의 저항성(抵抗性) 검정결과(檢定結果) 고도저항성(高度抵抗性) 계통(系統)은 발견할 수 없었고 중도저항성(中度抵抗性)인 4 계통(系統)을 선발할 수 있었다.

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