Chemical hybridization agent Pop! Artist Series (CHA)-induced male sterility is an important tool in crop heterosis.To demonstrate that CHA-SQ-1-induced male sterility is associated with abnormal tapetal and microspore development, the cytology of CHA-SQ-1-treated plant anthers at various developmental stages was studied by light microscopy, scanni

IntroductionIn Spain, graduates in medicine take a state exam which, depending on their result, enables them choose a speciality in a specific hospital.Becoming a specialist in dermatology involves 4 years of training in a hospital.The content of the speciality is government regulated, although it can vary slightly in different hospitals.Feedback a

The passive semi-strapdown roll stabilized platform is an inertial platform, which can isolate the rolling of a projectile body by a special mechanical device.In the passive semi-strapdown roll stabilized platform, the bearing device plays an important role in isolating the rolling of the projectile body.The smaller the friction moment of bearing,

The classification of hidden dangers in urban gas pipelines plays a vital role in the smooth operation of urban gas pipelines and in solving the problem of hidden safety dangers in urban gas pipelines.In recent years, the number and proportion of polyethylene (PE) pipelines in urban gas pipelines are increasing day by day, but the current classific