http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Polydispersity 조건에서 Crossflow 방식 정밀여과 공정의 케이크 형성 특성
김수한,박희경 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6
Cake formation at polydisperse condition has been studied experimentally and compared with that at monodisperse condition reported in previous researches. Kaolin and two kinds of CaCO₃ are used as particles and polysulfon hollow fiber microfilter is used as membrane for the experiment. This study evaluates the effects of particle size and shear rate which affect cake formation in crossflow microfiltration. EDSD (Effective Diameter for Shear-induced Diffusion) is used as a representative particle size for particles with various sizes. At polydisperse condition, the effect of shear rate on cake formation IS similar to those at monodisperse condition. Cake formation increases with the decrease of shear rate and the increase of feed concentration. But polydispersity makes the quantitative differences of the effects between monodisperse and polydisperse condition. Comparing all the effects of particle size and shear rate on cake formation, this study indicates that particle size is a crucial influential factor for cake formation at polydisperse condition and suggests that increasing particle size is the most efficient way to decrease cake formation.
침전극 저주파 자극이 흰쥐 중뇌수도주위 회색질의 nNOS 면역반응세포 변화에 미치는 영향
김수한,김지성,송치원,Kim, Su-Han,Kim, Ji-Sung,Song, Chi-Won 대한물리치료과학회 2003 대한물리치료과학회지 Vol.10 No.2
Acupuncture has been used as a clinical treatment in Oriental medicine for various diseases. In the present study was carried out to investigate the effects of acupuncture and electrical stimulation on the change neuronal nitric oxide synthase(nNOS) immunoreactive cells in the periaqueductal gray(PAG) area of the male SD rats. Enhanced expression of nNOS was detected in the dorsolateral-PAG(DL-PAG) area of rat with stress by fixed body, and acupuncture and needle electrode electrical stimulation groups at Hapgok like acupoint decreased the stress-induced enhancement in the expression of nNOS. The present results demonstrate that acupuncture and needle electrode electrical stimulation is effective in the modulation of expression of nNOS in the DL-PAG area under stress conditions.