25 articles in this issue
Fitri Khoerunnisa,Hendrawan Hendrawan,Yaya Sonjaya,Rizki Deli Hasanah
Electrically conductive nanocomposites polymer of poly(vinyl alcohol)/PVA, glutaraldehyde (GA) and multiwalled carbon nanotubes (MWCNT) has been successfully synthesized. The polymer nanocomposites were prepared by mixing PVA, GA (crosslinker), and MWCNT ... see more
Salma Ilmiati,Jana Hafiza,Jaka Fajar Fatriansyah,Elvi Kustiyah,Mochamad Chalid
Lignin is one of the most abundant biopolymer on earth. It has polar and non-polar side due to its hyperbranched structure, but the polarity of lignin has a higher tendency than non-polarity. Lignin has potential to be compatibilizer if the portion of non... see more
Aprilina Purbasari,Tjokorde Walmiki Samadhi,Yazid Bindar
Geopolymer as a Portland cement substitute had been synthesized from alkaline activation of co-combustion residuals of bamboo and kaolin. Types of used alkaline activators were NaOH solution, KOH solution, a mixture of NaOH solution-water glass, and a mix... see more
Eko Sri Kunarti,Indriana Kartini,Akhmad Syoufian,Karolina Martha Widyandari
Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated w... see more
Deni Swantomo,Kris Tri Basuki,Sigit Sigit,Yadi Yunus
In order to achieve high performance of electrochemical properties, numerous efforts have been devoted to the development of advanced multi-component hybrid double network hydrogel materials. In this research, the double network hydrogels were synthesized... see more
Dian Susanthy,Sri Juari Santosa,Eko Sri Kunarti
A study to examine the performance of p-aminobenzoic acid as both reducing agent for silver nitrate to silver nanoparticles (AgNPs) and stabilizing agent for the formed AgNPs has been done. The synthesis of AgNPs was performed by mixing silver nitrate sol... see more
Endang Tri Wahyuni,Roto Roto,Firda Ainun Nissa,Mudasir Mudasir,Nurul Hidayat Aprilita
In the present research, cetyltrymethyl ammonium bromide (CTAB)-modified silica from Kelud’s volcanic ash has been prepared and examined as adsorbent for removal of the hazardous Cr(VI) anion. The research was initiated with purification of SiO2 from the ... see more
Agustina Sus Andreani,Suyanta Suyanta,Eko Sri Kunarti,Sri Juari Santosa
Reductive adsorption of [AuCl4]-– by using ascorbic acid immobilized on Mg/Al hydrotalcite (Mg/Al HT) and synthesis of gold nanoparticles (AuNPs) from the reduced gold using sodium citrate have been conducted. Mg/Al HT was synthesized by co-precipitation ... see more
Wega Trisunaryanti,Triyono Triyono,Iip Izul Falah,Andreas David Siagian,Muhammad Fajar Marsuki
The synthesis of Ce/mesoporous silica (Ce/MS) and its lifetime determination for the hydrocracking of waste lubricant has been carried out. The MS was synthesized using tetraethyl orthosilicate (TEOS) and gelatin extracted from bovine bone as a template. ... see more
Samin Samin,Susanna Tuning Sunanti
The synthesis method of in-house zircon minerals certified reference material (CRM) from Kalimantan (Tumbang Titi), and Bangka has been studied with statistical method of ISO 13528-2008 and ISO 35-2006. Zircon Minerals weighing of 10 kg, and it was dried ... see more
Diah Dwiana Lestiani,Revi Apryani,Linda Lestari,Muhayatun Santoso,Eko Prabowo Hadisantoso,Syukria Kurniawati
The eruption of Mount Kelud that occurred on February 13, 2014, ejected a huge plume of ash and sand exceeding 26 km into the air which moved west over the island. The elements content in volcanic ash is important information for further study such as the... see more
Barlah Rumhayati,Catur Retnaningdyah
The aims of the research were to perform an integrative assessment of high metal pollution in Porong Estuary by determining (i) the distribution of heavy metals fraction in sediment, (ii) the potential risk of sediment to the metal bioavailability, and (i... see more
Venty Suryanti,Sri Hastuti,Tutik Dwi Wahyuningsih,Mudasir Mudasir,Dian Kresnadipayana,Inge Wiratna
The batch removal of Cu(II), Cd(II) and Pb(II) from individual heavy metal ion aqueous synthetic solution using biosurfactants produced by Pseudomonas aeruginosa with corn oil as substrate was investigated. The metal ion removal process of crude preparati... see more
Sagir Alva,Aiman Sajidah binti Abdul Aziz,Mohd Ismahadi bin Syono,Wan Adil bin Wan Jamil
The Ag/AgCl reference electrode based on the Arabic Gum (AG) hydrogel films was successfully developed. The Arabic Gum concentration used in this study was 10–40% (w/v) with an optimum concentration of 20% (w/v). In this study, reference electrode perform... see more
Hari Sutrisno,Ariswan Ariswan,Dyah Purwaningsih
Undoped titanium dioxide (TiO2) and a series of chromium(III) doped TiO2 (Cr-doped TiOfig. 12) with various %wt Cr atom were prepared by a reflux technique. The undoped TiO2 and Cr-doped TiO2 of 1.1, 3.9, 4.4 %wt Cr atom have been successfully analyzed bo... see more
Rini Dwiastuti,Marchaban Marchaban,Enade Perdana Istyastono,Florentinus Dika Octa Riswanto
Lipid nanoparticles, one of nanoparticle technology results has been developed both as a drug delivery system and as a research object. Complex lipid nanoparticle, in the drug delivery system development, has an advantage due to its less toxicity. It is i... see more
Naseer Inuwa Durumin Iya,Zaini Bin Assim,Isa Bin Ipor,Ajoke Omonrinoye Omolayo,Isaac John Umaru,Binta Hadi Jume
This study was to investigate survival, growth and accumulation potential of Acalypha wilkesiana in phytoextraction of heavy metals contaminated soil. Acalypha wilkesiana was tested to evaluate its tolerance and phytoextraction capacity in soils contamina... see more
Akyunul Jannah,Aulanni`am Aulanni`am,Tri Ardyati,Suharjono Suharjono
Rice bran is the waste product of rice milling which is abundant in Indonesia, it can be used as a raw material for the manufacture of bioethanol by fermentation. Before being fermented, rice bran must be hydrolyzed into glucose by biomass degrading. This... see more
Ala Yahya Sirhan
A method for the determination and analysis of benzoic acid and sorbic acid in yogurt and dried-yogurt products has been developed. This method was based on the use of a simple solid-liquid extraction method, followed by the high-performance liquid chroma... see more
Dwi Setyawan,Sukma Adhi Permata,Ahmad Zainul,Maria Lucia Ardhani Dwi Lestari
The aim of the study was to improve the in-vitro dissolution rate of quercetin (Qu) using cocrystallization of quercetin. Cocrystals of quercetin (Co Qu) were produced with malonic acid (Ma) as coformer at ratio 1:2 using solvent evaporation method. Cocry... see more
Melahat Göktas,Guodong Deng
Poly(methyl methacrylate)-b-poly(N-isopropylacrylamide) [PMMA-b-PNIPAM] block copolymers were obtained by a combination of redox polymerization and atom transfer radical polymerization (ATRP) methods in two steps. For this purpose, PMMA macroinitator (ATR... see more
Supandi Supandi,Yahdiana Harahap,Harmita Harmita,Rizka Andalusia
6-Mercaptopurine is a chemotherapeutic agent of the antimetabolite class. This study aims to analyze simultaneous validation of 6-mercaptopurine (6-MP), 6-methylmercaptopurine (6-MMP), and 6-thioguanosine-5’-monophosphate (6-TGMP) in dried blood spot (DBS... see more
Heri Budi Wibowo,Widhi Cahyo,Ratih Sanggra
A study on bulk polymerization kinetics of HTPB (Hydroxy Terminated Polybutadiene) and TDI (Toluene Diisocyanate) with infrared (IR) spectroscopy has been conducted. The investigations included the molar ratio of 2,4-TDI to 2,6-TDI isomers, the initial mo... see more
Phiciato Phiciato,Ika Monika,Arie Hardian
A medium temperature pitch obtained from atmospheric fixed-bed gasifier was distilled at a various time (1, 2, 3 and 4 h) to induce polymerization and the results were compared with a commercial pitch. Aromaticity level of pitches was examined using infra... see more
Armi Wulanawati,Harry Noviardi,Muhamad Sholehuddin Malik Ibrohim
Pancreatic cancer arises when cells in the pancreas begin to multiply out of control. In pancreatic cancer, over expression of heat proteins (Hsp70, Hsp 90), constitutive activation of NF?B, and Bcl-2 family are closely linked with resistance to apoptosis... see more