Vol. 2 No. 2 (2019): July 2019

Articles

• Synthesis and Characterization Nanomagnetite by Co-precipitation

  Rahimah Rahimah, Ahmad Fadli, Yelmida Yelmida, Nurfajriani Nurfajriani, Zakwan Zakwan

  90-96

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• Using Water Hyacinth Fiber ( Eichhornia Crassipes) as Heat Absorbers Media In Wall

  Muhammad Rahmatullah Amin, Sefri Wahyu Fernando Gultom, Fitrisia Krisa Bella, Putri Lynna A. Luthan

  97-103

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• Red Spinach (Alternanthera amoena voss) as an Environmental Friendly Acid Base Indicator

  Sri Adelila Sari, Suriati Nilmarito

  104-107

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• Combination of Sinabung Volcanic Ash and Humic Acid Against Characteristics of Humid Silica Fertilizers

  Veny Apriyani, Thomson A.S Girsang, Ribka Sirait, Lisnawaty Simatupang

  108-110

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• Utilization of Glycerol from Used Oil as an Ester Glycerol Surfactant

  Dian Wardana, Ahmad Ramadhan, Dinda Prihatini Fitri Amne, Eddiyanto Eddiyanto

  111-120

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• Application of Humid Silica Plus Fertilizer with Various Combinations of Planting Media

  Thomson A.S. Girsang, Veny Apriyani, Desti S.N Pasaribu, Lisnawaty Simatupang

  121-124

• Synthesis of Biodiesel From Rubber Seed Oil with Acid and Base Activated Natural Zeolite Catalyst

  Tiamina Nasution, Akhir Mauludin Pulungan, Yuli Asih Wiliranti, Junifa Layla Sihombing, Ahmad Nasir Pulungan

  125-130

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• Pb(II) and Oil Contamination Analysis of Belawan Sea, Medan City, North Sumatera

  Lili Nur Indah Sari Tarigan, Nurul Qodri, Septi Lumongga Duma rangkuti, Moondra Zubir

  131-135

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• Effect of Dragon Fruit Juice Addition on Changes in Peroxide Numbers and Acid Numbers of Used Cooking Oil

  Sri Adelila Sari, Tika Rahayu Putri, Muhammad Rudi AR

  136-141

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