This study investigated the effects of changes to the pulsation factor of pulsed direct currents on wound healing. Patients with a pressure ulcer at a care hospital for the elderly were randomly divided into three groups: Group 1 involved the application of 100㎲ in pulse duration, 10 ㎳ in pulse period, 100 pps in a pulsation factor, 15 ㎃ in pulse amplitude, and polarity red+ by using pulsed direct currents; Group 2 involved a change of pulse period to 8 ms; and Group 3 received general wound management. Although there were no statistically significant differences in the changing stages of pressure ulcers among the groups, all the groups dropped in numerical stages. In the two groups to which pulsed direct currents were applied, there was a statistically significant reduction in the stages of pressure ulcers from the initial assessment to the 12-week assessment (p<.05). Even though there were no statistically significant differences in changes to the area of pressure ulcers among the groups, a statistically significant decrease was found in pulsed direct current group 2 whose pulse period was shortened (p<.05). There was no difference in the healing rate of pressure ulcers among the groups, but it made a numerical increase in pulsed direct current group 1 and group 2 and a numerical decrease in group 3. There were no significant differences in the characteristics of those who had a full recovery among the groups. Those findings indicate that pulsed direct currents have positive effects on the wound healing of patients with a pressure ulcer and that a treatment with pulsed direct currents whose pulsation factor is raised by reducing the pulse duration is especially effective.

보리종실의 샐리적 특성을 포장출아력과 비교함으로써 포장유묘출아율과 수량의 예측에 적합한 검정방법을 구명하고자 맥주보리 2품종과 쌀보리 2품종을 인위노화처리시켜 고온발아검정(warm germination test), 저온발아검정(cold germination test), Tetrazolium 유모세검정(TZ vigor test), 전기전도도검정(electroconductivity test)의 결과를 포장출아율 및 수량과 비교 검토 하였다. 고온발아검정과 저온발아검정이 포장출아율 예측에 효과적인 검정법으로 나타났으며, 이들의 관계는 맥주보리에서는 Y(포장출아율)=-2.962+0.229X1 (% warm germination) -0.001X2 (vigor, WGT) +0.354X3 (vigor, CT) -0.558X4 (% cold germination)으로 나타났다. 다중화귀방정식의 결정계수는 맥주보리의 경우 고온발아검정에서의 발아율만으로 포장출아율을 64%예측할 수 있었다. 고온발아유묘세, 저온발아유묘세, 저온발아율은 각각 4, 7, 9%씩 결정계수를 높혔다. 네가지 검정치의 누가적 예측효율은 맥주보리에서 84%, 쌀보리 54%였다. 수량에서는 포장출아율에서 보다 맥주보리, 쌀보리 공히 예측효과가 낮게 나타났다.