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식물병원성세균의 약제저항성에 관한 연구 III. 벼 흰빛잎마름병균에 있어서 Streptomycin 내성균주의 몇 가지 변이
조원철,심재욱,Cho W. C.,Shim J. W. 한국응용곤충학회 1977 한국식물보호학회지 Vol.16 No.4
선발에 의하여 얻은 벼 흰빛잎마름병균 Xanthomonas oryzae의 Streptomycin 내성균에 대하여 병원성, 배지내에서의 생장량 및 자외선 감수성에 대한 변이성을 조사하여 다음과 같은 결과를 얻었다. (1) SM 내성균은 Wase-Aikoku-3, Rant Emas-2 황옥 및 Kimmase의 4개 판별품종에 대한 병원성 비교에서 75-6의 내성균주가 황옥에 대하여 감수성 반응이 모균과 달리 중정도의 저항성을 나타내었다. 2) SM-내성균은 정상배지에서 모균보다 약간 높은 생장량을 보였고 100ug/ml Agrepto 첨가 배지에서는 접종후 60시간까지 생장이 조지되었으나 70시간 이후에는 모균의 생장량을 능가하였다. (3) SM-내성균은 254mu 파장의 자외선 조사에서 모균과 동일한 감수성을 나타내어 내성인자는 안정된 것으로 생각되었다. The experiments were contucted to investigate the variability of pathogenesity, growth amount and UV-sensitibity on the streptomycin resistant isolate of the rice bacterial leaf blight pathogen, Xanthomonas oryzae, which selected by the stepwise transfer in 100, 3,000 and 10,000 ug/ml Argepto contained media. And the results obtained were as follows. (1) The SM-resistant isolates were tested the pathogenesity on the differential variety of rice, wase-Aikoku-3, Rant Emas-2, Hwang ok, and Kimmase. And the SM resistant isolate, obtained from 75-6 isolate, showed the reaction of moderately resistant to the differential variety of Hwang ok instead of susceptible reaction with its parental isolate. (2) The growth amount of the SM-resistant isolate was slightly higher than that of parental isolate, on the normal media. And the growth was inhibited on the 100ug/ml Agrepto contained media until 60 hours after transfer, however, its growth exceeded than parental isolate in the normal media, after 70 hours of transfer. (3) It is considered that the resistance factor might be stable character, since the sensitivity to UV irradiation (with 254 mr wave length) of the resistant isolate was the same as that of its parental isolate.
전방향 동요 시 압력중심의 기구학적 특성을 통한 하이힐 착용 여성의 자세균형회복 메커니즘에 관한 고찰
조원학(W. H. Cho),서민좌(M. J. Seo),최현기(H. K Choi) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
High-heeled women have been identified with balance control problems. The purposes of this study were to objectively quantify the displacements and velocities of center-of-pressure (COP) of body during waist pulling and to compare the differences between barefooted and high-heeled situations. We used a waist pulling system which has three different magnitudes to sway the subjects. We found that the kinematic information of barefooted and high-heeled women"s COP is very important in understanding the mechanism of postural balance control of women in every-day life. In the high-heeled’s case, the displacement of COP increases in 200% as against bare footed. Also the velocity variation of COP grows three times than the bare footed. COP analysis in postural balance study of high-heeled women is also considered useful in development of the safety systems that prevent high-heeled women from falling.
유지혈액투석 환자에 있어 영양상태와 염증지표의 관계에 대한 연구
한상엽(S. Y. Han),조상경(S. K. Jo),윤종우(J. W. Yoon),신진호(J. H. Shin),이소영(S. Y. Lee),차대룡(D. R. Cha),권영주(Y. J. Kwon),조원용(W. Y. Cho),표희정(H. J. Pyo),정태시(T. S. Jung) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.2
N/A Malnutrition is known to be an independent risk factor of morbidity and mortality in hemodialysis patients. The causes of malnutrition were obsucure. Several catabolic cytokines such as interleukin-1β(IL-1β), interleukin-6(IL-6), and tumar necrosis fac-tor-α(TNF-α) were reported to be elevated in hemo-dialysis patients with malnutrition, To evaluate the nutritrional status and relationship among cytokines IL-1β, TNF-α, and various parameters, we performed a cross-sectional study in maintenance hemodialysis patients who have undergone for six months at least. Patients who were taking steroid. showed any sign of infection, or had residual renal function were excluded from the study. Nutritional status was classified into well nourished(A), mild to moderate malnutrition(B), and severe malnutrition(C) by using subjective global assessment(SGA). Patients were divided into two groups (I: A, II: B and C) based on SGA. The level of IL-10, TNF-a were estimated by ELISA. Total patients were 23(M/F:15/8 mean age 52.0±1.56yrs). There were significant differences in weight changes for 6 months, CRP, and SGA between two groups based on the level of serum albumin(using 4.0g/dL as a cutoff value). Moreover, based on SGA, there were significant differences in age, BMI, CRP, and albumin between the group I and IL Serum albumin levels was directly correlated with transferrin(r=0.302, p=0.04), and was inversly correlated with age(r=-0.329, p=0.007). TNF- u was inversly correlated with Kt/Vueea(r=-0.291, p= 0.047), and directly correlated with the duration of maintenance hemodialysis(r=0,346, p=0.036), BMI(r-0.453, p<0.05). These data support the fact that albumin and CRP can be a good marker of nutritional status in maintenance hemodialysis patient. However cytokines and transferrin might not be related to nutritional status.