[Effects of ultrasound on the germination and seedling growth of three aged forage seeds.] / è¶ å£°æ³¢å¯¹3种老化牧草种子萌发和幼苗生长的影响.

To examine the effects and physiological mechanisms of ultrasound treatment on the germination and seedling growth of naturally aged seeds, an [L9(34)] orthogonal matrix experiment was carried out, which included ultrasound time, ultrasound temperature, output power and seed soaking time with tall fescue Festuca arundinacea stored for one year and five years at room temperature, perennial ryegrass (Lolium perenne, stored for five years), and Russian wildrye (Psathyrostachys juncea, stored for six years) as test materials. The results showed that ultrasound temperature was the most important factor for the germination of aged seeds. The appropriate ultrasound treatment promoted germination percentage and significantly enhanced root and shoot length in aged seeds of tall fescue (stored for five years) and Russian wildrye. The positive effect of ultrasound was not significant on the germination of aged seeds of tall fescue (stored for one year) and perennial ryegrass, but was significant on the root length. Ultrasound treatment reinvigorated aged seeds by increasing superoxide dismutase (SOD) and peroxidase (POD) activities and reducing malondialdehyde (MDA) content. A regression model analysis was performed to determine the final optimal ultrasound condition for aged grass seeds that resulted in ultrasound time of 22 min, at 26 ℃, output power of 254.29 W and a seed soaking time of 2.89 h.

Efficacy of different irrigation solutions on the early debridement of open fracture in rats.

Contaminating bacteria are only found on wound surfaces in the initial stages of open fractures; therefore, effective debridement is critical for bacterial infection prevention and the reduction of inflammatory reactions. Various irrigation solutions are currently being used; however, a comprehensive study on their efficacy is lacking. In the present study, a comparison of the effects of normal saline, iodophor and hydrogen peroxide as the irrigation solutions for debridement of open femur fractures in rat models was conducted. It was revealed that all three solutions were comparably effective in bacterial removal while normal saline was superior in minimizing adverse wound inflammation; therefore, the use of normal saline for routine debridement is recommended in the early-stage treatment of open fractures in the trauma clinic and in relief fieldwork.