Nucleic acid-functionalized metal-organic framework for ultrasensitive immobilization-free photoelectrochemical biosensing.

预同步策略可提高定时人工授精（TAI）妊娠率，但更简单方案可降低成本。601头泌乳荷斯坦牛随机分为两组，随后均接受Ovsynch-56方案进行首次TAI。Double-Ovsynch（DO）组（n=306）采用改良Ovsynch预同步：53±3泌乳天数（DIM）注射GnRH，7 d后PGF2α，3 d后GnRH，于Ovsynch-5...