16 articles in this issue
Saprizal Hadisaputra,Harno Dwi Pranowo,Ria Armunanto
The structures, energetic and thermodynamic parameters of crown ethers with different cavity size, electron donating/withdrawing substituent groups and donor atoms have been determined with density functional method at B3LYP level of theory in gas and sol... see more
Iqmal Tahir,Mohd Noor Ahmad,AKM Shafiqul Islam,Dachyar Arbain
Sinensetin-like molecules have been searched virtually to find a dummy template for Molecular Imprinted Polymer (MIP) synthesis. The aim of this study is to find a novel adsorbent for Solid Phase Extraction (SPE) of sinensetin based on tailored method usi... see more
Choiril Azmiyawati,Nuryono Nuryono,Narsito Narsito
Adsorption of Mg(II) and Ca(II) on disulfonato-silica hybrid (DSSH) in the aqueous solution has been studied. The hybrid was synthesized by sol-gel process with sodium silicate solution from rice hull ash, chloroprophyltrimethoxysilane (CTS) and 4-amino-5... see more
Rahmayeni Rahmayeni,Syukri Arief,Yeni Stiadi,Rianda Rizal,Zulhadjri Zulhadjri
Magnetic nanoparticles of TiO2-(x)NiFe2O4 with x = 0.01, 0.1, and 0.3have been synthesized by mixture of titanium isopropoxide (TIP) and nitric metal as precursors. The particles were characterized by XRD, SEM-EDX, and VSM. XRD pattern show the peaks at 2... see more
Suherman Suherman,Hanif Budi Prayitno
This research aims to investigate the quality of the Tambelan island waters as primary information to support these islands as a marine conservation area. Some chemical properties of seawater such as pH and DO (Dissolved Oxygen) were identified by portabl... see more
Andi Hairil Alimuddin,Sabirin Matsjeh,Chairil Anwar,Mustofa Mustofa
Synthesis of 7-O-carboxymethyl-3',4'-dimethoxyisoflavone from 7-hydroxy-3',4'-dimethoxyisoflavone derived from eugenol had been done. 7-hydroxy-3',4'-dimethoxyisoflavone was first converted into 7-O-ethoxycarbonylmethyl-3',4'-dimethoxyisoflavone via subst... see more
Dyah Iswantini,Tuti Hayati Ramdhani,Latifah K Darusman
The objective of this study was to determine the inhibition effect of celery extracts toward xanthine oxidase by in vitro method, and its active compounds. Roots and herb of celery were extracted using water and ethanol solvents. Results indicated that th... see more
Budy Rahmat,Imas Siti Setiasih,Roni Kastaman
This research was aimed to study the effect of glycerol separation on palm oil transesterification. Objectives of this study were to suppress the use of excess methanol and shorten the processing time. This research consisted of: design-build reactor, the... see more
Nuraini Harmastuti,Rina Herowati,Dyah Susilowati,Harno Dwi Pranowo,Sofia Mubarika
Chalcone, an a,ß-unsaturated ketone, has been shown have many biological activities such as anticancer and antifungi. This research was conducted to synthesize the chalcone derivatives and to obtain their cytotoxic activity on human cervix cancer cell lin... see more
Latifah K Darusman,Mohamad Rafi,Wulan Tri Wahyuni,Rizna Azrianiningsari
A new ultraviolet derivative spectrophotometry (UVDS) method has been developed for determination of reserpine in antihypertension tablets. A first-order UVDS based on the measurement of the distance between peaks to baseline (DZ) at the wavelength of 312... see more
Nova Syafni,Deddi Prima Putra,Dayar Arbain
3,4-dihydroxybenzoic acid (1) and 3,4-dihydroxybenzaldehyde (2) have been isolated from ethyl acetate fraction of methanolic fractions of leaves, stems and roots of the fern Trichomanes chinense L. (Hymenophyllaceae). These two compounds also showed signi... see more
Nuryono Nuryono,Ali Agus,Sri Wedhastri,Y.M.S. Maryudhani,Deni Pranowo,Yunianto Yunianto,Ebrahim Razzazi-Fazeli
A study on adsorption of AFB1 in corn (kernel and grained) on natural zeolite and bentonite has been investigated. The first work was adsorption in a batch system of standard AFB1 solution on adsorbents. Some factors such as contact time, concentration of... see more
Barlah Rumhayati,Chasan Bisri,Chasan Bisri,Heni Kusumawati,Faridah Yasmin
Phosphate and nitrate ions removal from drinking water has been conducted using acrylamide-ferrihydrite gel. The gel was prepared by mixing the ferrihydrite paste and acrylamide gel solution followed by casting at temperature 42-46 °C for at least one hou... see more
Sitti Rahmawati,Bunbun Bundjali
Vitamin C or ascorbic acid is needed by the human body but it is already damaged by the rise in temperature due to be oxidized to L-dehydroascorbic acid. This research aims to determine the kinetics of oxidation of ascorbic acid due to an increase if temp... see more
Astin Lukum,Fajriyanto Djafar
The aim of this research is to remove Pb(II) from waste water of Tolangohula sugar factory, Gorontalo. In this study, coagulation technique was developed using chitosan as coagulant. Chitosan was obtained from Peneaus monodon shell. The effect of coagulan... see more
Tri Joko Raharjo,Winda Cahyaningtyas,Surajiman Surajiman,Istini Istini,Deni Pranowo
PCR-RFLP technique to detect porcine contamination in chicken nugget has been developed and validated in this research. Various concentrations of pork were fortified during preparation of the nugget. DNA was then isolated from the nugget followed by PCR e... see more