ChaNaN [Part 1 - Basic Halacha] (Bitul and Blios #4 - Shulchan Aruch YD 92:3-4)
Rabbi Dovid Cohen
Chatichah Na'aseis Neveilah (חנ"נ) [Part 1] Basic Halacha Basar b'chalav; Sha'ar issurim; Hefsed merubah (examples); Lach and yavesh (לח ביבש, לח בלח, יבש ביבש, powdered stabilizer blend); Safek issur (five opinions); Steam systems; Yedias Hata'aroves. See seforim by Rabbi Cohen at www.kashrushalacha.com