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MaxEnt 모델링을 이용한 기후변화 시나리오에 따른 서어나무 (Carpinus laxiflora)와 개서어나무 (C. tschonoskii)의 분포변화 예측
이민기 ( Min-ki Lee ),천정화 ( Jung-hwa Chun ),이창배 ( Chang-bae Lee ) 한국농림기상학회 2021 한국농림기상학회지 Vol.23 No.1
Hornbeams (Carpinus spp.), which are widely distributed in South Korea, are recognized as one of the most abundant species at climax stage in the temperate forests. Although the distribution and vegetation structure of the C. laxiflora community have been reported, little ecological information of C. tschonoskii is available. Little effort was made to examine the distribution shift of these species under the future climate conditions. This study was conducted to predict potential shifts in the distribution of C. laxiflora and C. tschonoskii in 2050s and 2090s under the two sets of climate change scenarios, RCP4.5 and RCP8.5. The MaxEnt model was used to predict the spatial distribution of two species using the occurrence data derived from the 6<sup>th</sup> National Forest Inventory data as well as climate and topography data. It was found that the main factors for the distribution of C. laxiflora were elevation, temperature seasonality, and mean annual precipitation. The distribution of C. tschonoskii, was influenced by temperature seasonality, mean annual precipitation, and mean diurnal rang. It was projected that the total habitat area of the C. laxiflora could increase by 1.05% and 1.11% under RCP 4.5 and RCP 8.5 scenarios, respectively. It was also predicted that the distributional area of C. tschonoskii could expand under the future climate conditions. These results highlighted that the climate change would have considerable impact on the spatial distribution of C. laxiflora and C. tschonoskii. These also suggested that ecological information derived from climate change impact assessment study can be used to develop proper forest management practices in response to climate change.
활동적 생활습관과 복합운동이 인슐린 저항성에 미치는 영향
홍창배(Chang Bae Hong),김기진(Ki Jin Kim) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.30
The aim of the current study was to examine the changes of body composition, insulin resistance, blood lipid profiles and inflammatory markers following to spontaneous or controlled exercise participation in Korean adults selected from the general population. Subjects with previous diagnosis of diabetes were divided into 2 groups based upon spontaneous exercise participation for using a cross-sectional approach as active group (n=16) and non-active group (n=16). Additionally, we analyzed the effects of a 12 week exercise intervention program by the comparison of between exercise group (n=12) and control group (n=12). We measured anthropometric factors (BMI, percent body fat, WHR, and abdominal fat area by CT scanning), BP, blood levels of glucose, lipid profiles, fibrinogen, CRP, leptin, HbA1c, PAI-1, HOMA, OGTT and physical fitness. Independent t-tests were used to assess differences between active and non-active groups. Additionally, 2-way repeated ANOVA for group and time was used to compare the changes after a 12 week exercise intervention program. Significance was accepted at p<0.05. In cross sectional comparison, active group showed significantly (p<0.05) lower in WHR, visceral fat area, VSR, blood levels of TG, HbA1c and CRP than non-active group. Active group had a lower trend for HOMA-IR than non-active group, and showed significantly (p<0.05) lower in glucose response area of OGTT than non-active group. Exercise group showed a significant (p<0.05) decrease in WHR and HOMA-IR whereas control group showed no changes. In these results, we confirmed that continuous and regular exercise participation has a positive effect on insulin resistance with the decrease of WHR, visceral fat area and blood level of TG. We think that the more long-term exercise intervention may be effective improvement on insulin resistance.
Helicobacter pylori 항원을 이용한 면역우유 생산 및 항체특성에 관한 연구
배만종,김수정,예은주,김병기,박창호,김미경 경산대학교 생명자원개발연구소 2003 생명자원과 산업 Vol.7 No.-
본 연구는 위염, 위궤양, 위림프종 및 위암과 같은 소화기 질환의 원인균으로 알려진 Helicobacter pylori균을 항원으로 하여 젖소에 면역시킨 후 생산된 우유의 anti-H. pylorigkdcp의 생성능을 검토하고, 백신투여량과 항체 생성과의 관계, 항원 항체의 특이성, H. Pylori균 응집력, 항체의 산과 열에 대한 안정성, 그리고 백신투여가 젖소에 미치는 영향을 알아보았다. 1. 백신 투여량에 따른 혈청과 유청내의 anti-H. pylori항체의 함량은 10㎖, 20㎖, 30㎖ 백신투여 모든 군에서 대조구에 비해서 높은 양의 항체 생성을 확인하였다. 유의적인 차이는 없었으나 20㎖투여가 항체 생성이 가장 많은 것으로 조사되었다. 백신 투여량에 따른 유청내의 anti-H. pylori항체 생성량은 혈청에서 나타난 결과와 유사한 양상으로 형성되었다. 2. Anti-H. pylori항체의 SDS-PAGE에 의한 분자량측정 결과 heavy chain은 50kDa정도, light chain은 24kDa정도로 확인 되었다. 3. H. pylori항원 단백질의 분자량측정 결과 12개의 band가 형성되었다. Anti-H. pylori의 항원 특이성을 알아보기 위해 western bloting을 한 결과 혈청, 혈청정제, 유청, 유청 정제 모두 7개의 항원성 물질을 확인할 수 있었고, 주 항 원성 물질은 분자량이 97, 66, 34kDa 이었다. 4. 응집반응결과 유청속의 anti-H. pylori항체가 H. pylori균에 대해 1/10의 응집가를 나타내었다. 5. Anti-H. pylori항체의 산·알칼리에 대한 안정성 실험에서는 pH 5 ∼ pH 10 범위에서 안정한 상태로 100%의 활성을 나타내었다. 6. Anti-H. pylori항체의 열에 대한 안정성 실험에서는 60℃에서 60분간 안정한 상태를 보였고, 70℃에서도 비교적 안정한 상태였으나 60분 경과후 40%정도 활성이 감소하였다. 80℃에서는 4분간 처리했을 때 77%의 활성을 유지하였고, 100℃에서도 1분간은 비교적 안정한 상태였다. 7. 백신투요로 인하여 유량이 12% 감소하는 경향을 나타냈고, 최장 1주일 정도 지나면서 회복되었다. 8. 백신투여 후 젖소의 체온을 측정한 결과 대조구에 비해 정상적인 범위 내에서 체온이 상승하는 경향을 나타내었다. This study has been to examine bio-function of anti-H. pylori antibodies of milk produced from cows immune with antigen germ of Helicobacter pylori and search the relation between vaccine dosage volume and antibody formation, peculiarity of antigen antibody, cohesion of H. pylori germ, stability about add and heat of antibody, and impact of vaccine dosage on cows. The content of serum and Anti-H. pylori antibody within whey in accordance with vaccine dosage volume has confirmed the formation of high-quantified antibody compared to the controlled conditions in all groups vaccine dosages of 10㎖, 20㎖, and 30㎖. It has been turned out that the antibody was farmed most in 20㎖ dosage on while there was no attention difference. The molecular weight of Anti-H. pylori antibody measured by SDS-PAGE were turned out as about 50kDa in the heavy chain and about 24kDa in the light chain. 12 bands were formed as the result of measured molecular weight of antibody protein. The western blotting was performed in order to examine the antigen peculiarity of Anti-H. pylori that all 7 antigen substances including serum, serum refining, whey and whey refining could be confirmed and the main antigen substances were 97, 66, 34kDa of molecular weight. As a result of cohesive response Anti-H. pylori antibody in whey showed 1/10 cohesive rate about H. pylori germ. In stability test about acid and alkali of antibody there was 100% activated in the range of pH 5-pH 10. In stability test about heat it showed stable condition in 60℃: for 60 minutes and comparatively stable condition in 70℃, but reduced activation to 40% after 60 minutes. It maintained 77% activation in 80℃ for 4 minutes and comparatively stable in 100℃ for I minute. It was inclined to reduce to 12% of flow caused by vaccine injection, but recovered after about maximum 1 week. In measurement of body temperature of cows after vaccine injected, it was inclined to rise with the normal scope in comparison with the controlled conditions.
장두상,조인술,이기풍,배한수 영남이공대학 1996 論文集 Vol.25 No.-
The aim of this study is to modify the surface of poly(ethylene terephthalate) (PET) films by using low temperature plasma of starting materials such as hexafluorobenzene(HFB), 1,1,1,5,5,5-hexafluoro-2,4-pentanedione(HFPD), hexafluoroglutaric anhydride(HFGA), hexafluoroacetone trihydrate (HFATH), acrylic acid(AA), and acrylonitrile(AN). Plasma system made for this study was used in modifing PET films. PET films were treated by plasma and contact angles of modified film were measured according to Busscher method, and also the work of adhesion worked out as Young-Dupre' equation. The results were as follows. The effect of plasma treatment on the work of adhesion of PET films depend upon the kinds of the starting material, PET films treated by HFB, HFPD, and HFGA plasma were appeared relatively lower the work of adhesion than the untreated its, while PE-I' films treated by HFATH and AA plasma are showed higher than untreated its. But the PET film treated by AN plasma has been had the same work of adhesion of the untreated it. And the liquid group proposed by Busscher are not suitable to the assess in the high work of adhesion according to the Young-Dupre' equation.