Pengaruh homogenisasi dan penambahan nitrogen dalam medium pertumbuhan pada teknik hidrolisis terhadap penghilangan selubung mucilage strain-strain cyanobacteria filamen lurus = The effect of homogenization and addition of nitrogen in growth medium in hydrolysis techniques on mucilage sheath removal of filamentous cyanobacteria strains

Produksi biomassa leptolyngbya (cyanobacteria) HS-16 pada medium BBM dan medium NPK = Biomass production of leptolyngbya (cyanobacteria) HS-16 in bold's basal medium and NPK medium

Pengaruh kapur terhadap kandungan nitrogen pada manur ayam broiler(pedaging)

Pengaruh variasi suhu terhadap berat biomassa leptolyngbya (cyanobacteria) HS-16 dan HS-36 pada medium BG-11 = The effect of temperature variation to biomass weight of leptolyngbya (cyanobacteria) HS-16 and HS-36 in BG-11 medium

Studi senyawa nitrogen penyebab perubahan warna pada fraksi heavy kerosene refinery Unit II Dumai dan alternatif solusinya = Study of nitrogen compounds causes of color instability in heavy kerosene fraction refinery Unit II Dumai and alternative solution.