What items are not batil bele,selling chavis nesech that's been mixed in another chavis, and cleaning out nesech from a barrel when you have to do different cleansing 

min bmino with yayin nesech and batul bshishim 

right of first refusal on properties with a kinya,nitzuk chibur or aino chibur, and drinking from straws with a goy

Is mishicha koina by a goy machlokes ameimar and Rav ashi

10 cases of Rava being meikel on yayin nesech due to mirtas 

Three cases of a machlokes tana Kama and Reb shimon Ben Gamliel of how long one has to be worried about a goy being left alone with wine

where the machlokes Reb Meir and Reb shimon is in regards to noisan Tam lifgam and the Halacha when a rat falls into beer

Machlokes Reb Meir and Reb shimon is nosson tam lifgam asur or mutar and where they learn it from. 

When new wine nesech gets mixed into grapes is it asur with a drop or nosein tam and is the smell of something considered significant in Halacha all machlokes abaya and rava

Story with rava and bar shishach,working a job and also yayin nesech when is it muta,and what to do when yayin nesech spills on food