Guangzhou Science, Technology and Innovation Commission

To systematically analyze the potential of embryo implantation through comparison between the number of surviving blastomeres, the growth, and implantation rate.Retrospective analysis on implantation rate and the growth of prefreeze-postthaw embryos with different blastomeres in 1487 frozen embryo transfer cycles.In groups of postthaw embryos without damage, implantation rate and the average number of blastomere growth increased significantly with increasing number of blastomeres. The implantation rate and the number of blastomeres of embryos with 8-8c (the number of blastomeres in prefreeze embryo-the number of blastomeres in postthaw embryo) continued to grow at a significantly higher rate than that of 5-5c and 6-6c (P < .05). In groups of embryos with the same number of blastomeres before freezing and with partial damage after resuscitation, the implantation rates were lower and the average numbers of blastomere growth reduced as the number of damaged blastomeres increased. For embryos with good quality before freezing, 1 to 3 damaged blastomeres in postthawed embryos did not affect the development and implantation rate. Both implantation rate and growth rate of embryos with 8-6c were significantly higher than those of embryos with 6-6c (P < .05).The number of surviving blastomeres and growth in frozen-thawed embryos could be important index to predict embryo development potential and clinical outcome of implantation. For embryos with good quality, a small amount of damaged blastomeres would not weaken embryo development potential and implantation rate after being thawed.

A wireless sensor network (WSN) node is designed for monitoring rice field in order to solve the existing problems of poor real-time performance, Low system stability and large monitoring area, etc.The node uses a STM32F103VET6 as a processing core, and a WLK01L39 RF chip is used in wireless communication module, while the sensor module is composed of the air temperature and humidity sensor, Light intensity sensor and soil moisture sensor.uC/OS-II is applied as operation system to realize multitask scheduling running.The sensor node applies a mechanism as sleeping and waking up work modes to reduce power consumption.The mean current consumption of sensor nodes raged from 23.24mA to 32.82mA under operating mode and 0.026mA under sleeping mode.The results of a two-week networking experiment indicated that the average PLR (Packet Loss Rate) of network was 0.76%.In conclusion, the design of sensor node is suitable for effective monitoring of rice field.