11 articles in this issue
Aulia Husna Rabbani, Alimuddin -, Chairul Saleh
The research of desalination the sea water by utilization of the strach bump a “Pisang Ambon (Musa paradisiaca var sapientum)” modification has been done. Modification of starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” had be a ability better ... see more
Eka Apriska S Kusuma, Aman Sentosa Panggabean, Yasser Arafat
The research on optimization of analytical performance in the determination of phosphorous as P2O5 content in the coal ash with visible spectrophotometer method has been done. In this research was conducted validation visible spectrophotometer method to e... see more
Erwin -, Muhammad Asfian Nur, Aman Sentosa Panggabean
The study of potential use of extracts and fractions of purple cabbage (Brassica oleracea L.) as an indicator of acid-base has been conducted. This research aims to determine the color change at a certain pH to extract total, n-hexane, ethyl acetate and m... see more
Kalmud Nia Tekha, Erwin -, Rudi Kartika
The phytochemical tests and toxicity test extract from petals of kepok banana flowers (Musa paradisiaca Linn.) have been researched. The method used is Brine Shrimp Lethality Test (BSLT). According the results of phytochemicals test from petals of the kep... see more
Marlinawati -, Bohari Yusuf, Alimuddin -
The research of adsorption cadmium (II) metal ions in the solution by activated carbon from durian peel has been done. Adsorption process is done by using a variation of pH (1, 2, 3, 4, 5 and 6), variation of contact time (15, 30, 45, 60, 75 dan 90 menit)... see more
Nadhirah -, Alimuddin -, Chairul Saleh
The research about analysis of caffeine content on coffee Sumatera and coffee Flores with cycle variations using spectrophotometer UV-Vis has been done. Coffee extract obtained through soxhletation with ethanol 96% and variation cycles used is 3, 6, 9, 12... see more
Novalien Fiergiyanti, Erwin -, Syafrizal -
The phytochemical, brine shrimp lethality and activity antioxidant test and secondary metabolits of bee pollen have been conducted. The pollen samples are extract with solvent ethanol by masseration method and that is concentrated by using rotary evaporat... see more
Nur Aini Haryati, Chairul Saleh, Erwin -
A research aims to know the toxicity of Pucuk Merah (Syzygium myrtifolium Walp.) red leaves extracts against brine shrimp Artemia salina Leach and its bioactivity against Escherichia coli and Staphylococcus aureus has been carried out. The dried samples w... see more
Tria Annisa Rizky, Chairul Saleh, Alimuddin -
The research about analysis of caffeine content on coffee Robusta (Toraja) and coffee Arabika (Jawa) with cycle variations using spectrophotometer UV has been done. Coffee extract obtained throughsoxhletation with ethanol 96 % and variation cycles used is... see more
Yulianti Kartika, Aman Sentosa Panggabean, Rahmat Gunawan
The reduction of chromium concentration in Samarinda sarong wastewater by electrocoagulation method has been carried out. The research used Atomic Absorption Spectrophotometer (AAS) as an instrument determination level. To determination the optimum levels... see more
Agustin Pratiwi, Bohari Yusuf, Rahmat Gunawan
The analysis of changes in levels of copper (Cu) on the addition of silver ions (Ag) with electrocoagulation method has been researched by using Atomic Absorption Spectrophotometer (AAS) as an instrument for the determination of levels. The addition of io... see more