Hello?n nay ??a ch? IN24H.VN là m?t trong nh?ng ??a ch? in ?n t?i Hà N?i ?ang ???c r?t nhi?u ng??i tin t??ng b?i ch?t l??ng tuy?t v?i.Secondary fixation: To increase the contrast with the moment constructions In the specimen and provides additional stability, a secondary fixation is carried out employing osmium tetroxide (OsO4).A vacuum method