17 articles in this issue
Utari Utari,Kusumandari Kusumandari,Budi Purnama,Mudasir Mudasir,Kamsul Abraha
Surface morphology of Fe(III)–porphyrin thin layers was studied using atomic force microscopy. The thin layer samples used in these experiments were deposited by spin coating methods on indium–tin-oxide substrates at room temperature under atmospheric con... see more
Maria Ulfa,Wega Trisunaryanti,Iip Izul Falah,Indriana Kartini
Wormhole-like mesoporous carbon from gelatine (WMCG) with two different pore diameters have been synthesized by adopting a modified infiltration treatment. The infiltration effect on the morphology was investigated. The results show that the WMCG sample w... see more
Dodi Irwandi,Zainal Alim Mas’ud,Komar Sutriah,Muhammad Khotib
Carbon foam from fine coal and phenolic resin mixture had been prepared by heating in nitrogen atmosphere. The composition of fine coal in a mixture was 30, 35, 40, 45 and 50%. Physical and mechanical characters of carbon foam that were determined from ea... see more
Oluwafunmilayo Florence Adekunle,Ray John Butcher,Oladapo Bakare,Joseph Anthony Orighomisan Woods,Olusegun Ayobami Odunola
Two mixed –ligand complexes [Cu(bipy)2N3(ClO4)] and [Cu(5,5’-DiMebipy)2(N3)](ClO4) have been prepared and characterized. The compounds were characterized by elemental analyses, IR and UV-Visible spectroscopy, room temperature magnetic susceptibility measu... see more
Fahimah Martak,Nuari Wahyu Dwi Cahyani,Zjahra Vianita Nugraheni,Wahyu Prasetyo Utomo
Binuclear cobalt(II) complex with 2,4,5-triphenyl-1H-imidazole ligand has been synthesized using reflux method. The yellowish green crystals with needle-like shape were obtained. Determination of molecular formula of the complex was carried out using Atom... see more
Triastuti Sulistyaningsih,Sri Juari Santosa,Dwi Siswanta,Bambang Rusdiarso
It has been examined the application of Mg/Al-NO3 hydrotalcite-magnetite synthesized mechanically (MHT) and ultrasonically (UMHT) by co-precipitation method as adsorbents for [AuCl4]– from aqueous solution. Two techniques of synthesis were conducted to de... see more
Budi Setiawan,Yusran Dani,Nurmaya Arofah
In order to understand the sorption behavior of 137Cs and 90Sr into soil sample from Rembang and Subang, it is important to estimate the effect of contact time, ionic strength and concentration of metal ion in the solution. For this reason, the interactio... see more
Azmairit Aziz,Widya Tania Artha
Terbium-161 (161Tb) is a potential radiolanthanide due to its favorable properties for treatment small size of cancer. Preliminary study on radiochemical separation of 161Tb from Gd/Tb matrix using Ln resin column based on extraction chromatography method... see more
Hartati Hartati,Didik Prasetyoko,Mardi Santoso
Porous aluminosilicate materials included microporous and mesoporous ZSM-5, hierarchical aluminosilicates, and mesoporous aluminosilicate were tested for acetalization of furfural (furan-2-carbaldehyde) with propylene glycol. The existing synthesis method... see more
Wiwit Denny Fitriana,Taslim Ersam,Kuniyoshi Shimizu,Sri Fatmawati
Moringa oleifera have been evaluated for its antioxidant activity. M. oleifera leaves were extracted with methanol, ethyl acetate, dichloromethane and n-hexane. The antioxidant activity of extracts were evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) fr... see more
Ahyar Ahmad,Harningsih Karim
An investigation on purification and characterization of amyloglucosidase enzyme from Endomycopsis fibuligera by fermentation of sago starch has been carried out. This enzyme is inductive and can be produced by fermenting sago starch in a medium containin... see more
Cahya Septyanti,Irmanida Batubara,Mohamad Rafi
Fingerprint analysis using high performance liquid chromatography (HPLC) has been developed for authentication of Kaempferia galanga from related species, such as Kaempferia pandurata and K. rotunda. By comparing the fingerprint chromatograms of K. galang... see more
Edia Rahayuningsih,Ayub Wijayanto,Putri Nurfitasari
The general objective of this study is to preserve natural colorant extract of jalawe fruit peel in water-based solution during storing. The specific objectives in this research are finding suitable type and amount of antimicrobial compound to prevent bio... see more
Aliefman Hakim,Liliasari Liliasari,Asep Kadarohman,Yana Maolana Syah
This research aims to investigate effect of learning using natural product mini project laboratory on students’ critical thinking skills. The research was conducted on sixth semester of 59 students of chemistry and chemistry education program from one of ... see more
Maya Rahmayanti,Sri Juari Santosa,Sutarno Sutarno
Salicylic acid-modified magnetite (Mag-SA) and gallic acid-modified magnetite (Mag-GA) particles were prepared by co-precipitation procedure. Characterization results showed the interaction that occurs between the surface of magnetite with salicylic acid ... see more
Bambang Rusdiarso,Rahmat Basuki,Sri Juari Santosa
Extraction and purification of humic acid from dry horse dung powder (HD-HA) was performed successfully and the purified HD-HA was then applied as sorbent to adsorb Zn2+. Extraction and purification were performed based on procedure of Stevenson (1994) un... see more
Candra Purnawan,Sayekti Wahyuningsih,Pramudita Putri Kusuma
Synthesis of graphite/PbTiO3 composite as a catalyst in photodegradation and photoelectrodegradation process of methyl orange have been conducted. The purposes of this research are to study the effect of radiation time, composition of composite, voltage a... see more