• 대한의용생체공학회:의공학회지
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• 제13권3호
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• pp.245-252
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• 1992

Air pressure decay (APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those reused in patients several times. C-DAK 4000 (Cordis Dow) and CF 15-11 (Baxter Travenol) reused dialyzers obtained (rom the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAK dialyzers had a larger APD($11.70{\pm}1.32$mmHg/min) compared to CF dialyzers($4.32{\pm}0.55$mmHg/min) (p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHg/min)on the reused dialyzers(2 out of 40 CF and 5 out 26 C DAK) were attributed to the possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD Is a more son sitive test than UFR test to evaluate the integrity of the fibers.

• 대한의용생체공학회:의공학회지
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• 제6권2호
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• pp.63-68
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• 1985

Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70$\pm$1.32mmHg/min)compared to CF dialyzers(4.32$\pm$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers.

• 한국결정성장학회지
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• 제21권6호
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• pp.230-234
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• 2011

$CF_4$ Ar 및 $SF_6$/Ar 유도결합 플라즈마을 이용하여 ZnO 박막의 고이온밀도 플라즈마 식각을 수행하였다. $10CF_4$/5Ar, $10SF_6$/5Ar 유도결합 플라즈마에서 최고 ~1950 ${\AA}$/min과 ~1400 ${\AA}$/min의 식각 속도를 확보하였다. 대부분의 조건 하에서 식각된 ZnO 표면은 식각 전보다 더 낮은 표면조도 값들을 나타내었다. $10CF_4$/5Ar 유도결합 플라즈마에서 Ni mask는 ZnO에 대해 최고 11의 높은 식각 선택도를 나타낸 반면에 Al은 이보다 낮은 1.6~4.7 범위의 식각선택도를 나타내었다.

• 생약학회지
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• 제37권4호
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• pp.314-319
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• 2006

This research was investigated the effect of the Ginseng Radix plus Crataegi Fructus (Gin-CF) on Alzheimer's disease. Specifically, the effects of the Gin-CF extract on $IL-1\beta,\;TNF-\alpha$ of BV2 microglia cell line treated with LPS. The Gin-CF extract suppressed the over-expression of $IL-1\beta$ protein, $TNF-\alpha$ protein, MDA, and CD68/CD11b, in the mice with Alzheimer's disease induced by ${\beta}A$. These results suggest that the Gin-CF extract may be effective for the prevention and treatment of Alzheimer's disease. Investigation into the clinical use of the Gin-CF extract for Alzheimer's disease is suggested for future research.

• KCI Concrete Journal
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• 제11권3호
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• pp.65-77
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• 1999

A portland cement was reinforced by incorporating carbon fiber(CF), silica powder, and impregnating the pores with styrene monomers which were polymerized in situ. The effects of type, length, and volume loading of CF, mixing conditions, curing time and, curing conditions on mechanical behavior as well as freeze-thaw resistance and longer term stability of the carbon-fiber reinforced cement composites (CFRC) were investigated. The composite Paste exhibited a decrease in flow values linearly as the CF volume loadings increased. Tensile, compressive, and flexural strengths all generally increased as the CF loadings in the composite increased. Compressive strength decreased at CF loadings above approx. 3% in CFRC having no impregnated polymers due to the increase in porosity caused by the fibers. However, the polymer impregnation of CFRC improved all the strength values as compared with CFRC having no Polymer impregnation. Tensile stress-strain curves showed that polymer impregnation decreased the fracture energy of CFRC. Polymer impregnation clearly showed improvements in freeze-thaw resistance and drying shrinkage when compared with CFRC having no impregnated polymers.

• Journal of Acupuncture Research
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• 제27권2호
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• pp.11-21
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• 2010

Objectives : We tried to investigate the effects of Carthami Semen(CF) pharmacopuncture and Bovis Calculus Fei Ursi(BU) pharmacopuncture on the heart rate variability(HRV) in adult men. As well as we tried to observe how CF pharmacopuncture and BU pharmacopuncture effect on the balance of the autonomic nervous system. Methods : We investigated on 40 healthy volunteers consisted of 20 subjects in CF pharmacopuncture group and 20 subjects in BU pharmacopuncture group respectively. We ruled out subjects whose vital sign isn't in normal range, yet they had taken a rest. The study established by a randomized, single-blind clinical trial. CF pharmacopuncture and BU pharmacopuncture was applied on each group. We measured HRV 7 times : baseline measurement and every 5 minutes for 30 minutes after injection. The SPSS 15.0 for Windows was used to analyze the data by the paired t-test(in group) and Independent sample t-test(between the groups). Results 1. After injection of CF pharmacopuncture, SDNN, Ln(TP), Ln(VLF) and Ln(LF) increased significantly, and Complexity, pNN50 decreased significantly. 2. After injection of BU pharmacopuncture, RMSSD, SDSD and HRV-index increased significantly. Conclusions : We suggest that CF pharmacopuncture activate sympathetic nervous system and BU pharmacopuncture tend to activate the autonomic nervous system.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1062-1067
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• 2003

In this study, corrosion fatigue characteristics of CF8M and CF8A steel were investigated on the simulated PWR condition(Temp.:$316^{\circ}C$, Pres.: 15:MPa). To make the simulated PWR condition. the special test machine consisted of INSTRON, Autoclave, LOOP and Measurement system was developed. As ${\Delta}K$ is ranged from 11 to $20MPa{\sqrt{m}}$, Crack growth rate of PWR condition is faster than air condition. Above $20MPa{\sqrt{m}}$, the crack growth rate of PWR and air condition is similar. Corrosion fatigue characteristics regardless of the ferrite contents($10{\sim}25wt.%$) is not different. After the test, the fracture surface of specimens was examined. It was difficult to verify the fracture modes such as striation, intergranular crack and cleavage and so on. As the ferrite content of CF8M is increased, the more particles covered fracture surface were peeled.

• Journal of Acupuncture Research
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• 제21권6호
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• pp.291-298
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• 2004

Objective : This study was designed to investigate the effect of Carthami Flos Herbal-Acupuncture(CF) on Subluxation of the Head of the Radius. Methods : CF was administered one time per 2days. The following points were selected : TE10(天井), LI11(曲池), LI10(手三里). After CF administration conventional body-acupuncture was performed at the same points. We evaluated the patient through Visual Analogue Scale(VAS) and Elbow Range of Motion(ROM). Results : After 6 times of treatment, the patient showed that clinical symptoms was disappeared, VAS changed from 10 to 1 and there was no limitation of ROM. Conclusions : According to the results, CF and early Exercising may have rapid effects on the Subluxation of the Head of the Radius. But further studies are required to prove the effect of CF on Subluxation of the Head of the Radius.

• 충청수학회지
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• 제16권2호
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• pp.11-21
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• 2003

In this paper, we solve the following functional equation $$af\(\frac{x+y+z}{b}\)+af\(\frac{x-y+z}{b}\)+af\(\frac{x+y-z}{b}\)+af\(\frac{-x+y+z}{b}\)=cf(x)+cf(y)+cf(z)$$, and prove the Hyers-Ulam-Rassias stability of the functional equation as given above.

• 한국환경농학회지
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• 제31권1호
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• pp.30-36
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• 2012

BACKGROUND: The resistance of rice bakanae disease pathogens against the fungicide prochloraz has been reported. Understanding the resistance mechanisms is an important for better control of the pathogens. In the present study, we investigated the resistance mechanisms of Fusarium fujikuroi CF337 (CF337) against prochloraz. METHODS AND RESULTS: Morphological changes in the cell wall of CF337 grown in potato dextrose broth (PDB) with or without prochloraz was investigated by transmission electron microscopy. Growth inhibition of CF337 was examined in PDB containing prochloraz or an ABC transporter inhibitor or both of them. Cell wall thickness of CF337 grown in PDB with prochloraz was significantly increased from $80.73{\pm}1.99nm$ to $193.11{\pm}7.07nm$. Significant inhibition in the growth of CF337 was observed in the presence of both prochloraz and the inhibitor, but no growth inhibition was observed in the presence of the inhibitor or prochloraz. Sequence analysis of ATP-binding cassette transporter (ABC) gene of CF337 showed 70 to 80% similarities to the genes of the pathogens resistant to other fungicides. CONCLUSION: Efflux transporter system and changes in cell wall thickness were suggested as resistance mechanisms of CF337 against prochloraz.