25 articles in this issue
Ira Oktavia,Aidah Nur Fithriah,Nur Umriani Permatasari,Enny Ratnaningsih,Rukman Hertadi
This study examined the potential of levan from the halophilic bacterium Bacillus licheniformis BK1 as a nanoparticle system for protein immobilization. Levan produced by B. licheniformis BK1 was obtained by incubating the bacterium in the optimized Belgh... see more
Tutik Dwi Wahyuningsih,Yehezkiel Steven Kurniawan
In this study, two novel compounds, i.e., ethyl 8-(3-octyl-5,6-dioxo-1,4-dioxan-2-yl)octanoate and ethyl 8-(3-octyl-5,7-dioxo-1,4-dioxepan-2-yl)octanoate were prepared from oleic acid as the starting material. Both compounds were obtained from the esterif... see more
Akram La Kilo,Alberto Costanzo,Daniele Mazza,Muhamad Abdulkadir Martoprawiro,Bambang Prijamboedi,Ismunandar Ismunandar
BIMEVOX had the potential to play an important role in solid oxide fuel cell, especially as the electrolyte due to their high ionic conductivity. In this work, oxide ion migrations of ?-Bi2VO5.5 and BIMEVOX were simulated using density function theory (DF... see more
Lestyo Wulandari,Mellda Kusuma Candra Dewi,Nia Kristiningrum,Yashinta Nirmala Siswanti
The leaves of soursop (Annonamuricata L.) are commonly used for health because of their antioxidant activity from its highest phytochemical content, namely phenolic compound, which is influenced by the varieties of this plant. In Indonesia, there are two ... see more
Nur Azza Azyan Muin,Hawaiah Imam Maarof,Nur Alwani Ali Bashah,Nor Aida Zubir,Rasyidah Alrozi,Norhaslinda Nasuha
In this work, coconut shell activated carbon (CSAC) electrode was evaluated to remove copper ion via electrochemical processes. CSAC electrode and graphite were applied as the cathode and the anode, respectively. The reusability of the electrode, the effe... see more
Nurulhuda Amri,Ahmad Zuhairi Abdullah,Suzylawati Ismail
This work compares commercial aluminium electrode for use in the treatment of wastewater by electrocoagulation process against waste aluminium cans electrode. The applicability of the waste aluminium cans electrode was tested for decolorization of Acid Re... see more
Faraziehan Senusi,Benjamin Ballinger,Suzylawati Ismail
This paper investigates the permeability and separation performance of polyphenolic-amine coated PVDF membrane with hydrophilic (26.9 ± 5.6°) and underwater oleophobic (162.1 ± 5.1°) surface modification. Surface chemical structures, surface compositions ... see more
Emman Jassim Mohammad,Mohanad Mousa Kareem,Abbas Jasim Atiyah Lafta
This work describes the synthesis of nanocomposites of multiwall carbon nanotubes (MWCNTs) with co-oxide nanocomposite (MWCNTs)/MO. These nanocomposites were prepared using a simple evaporation and drying process. The obtained composites were characterize... see more
Zulhelmi Aziz,Nancy Dewi Yuliana,Partomuan Simanjuntak,Mohamad Rafi,Syamsudin Abdillah
Smallanthus sonchifolius [Poepp. & Endl.] H. Robinson (Asteraceae) also known as Yacon or insulin plant, is traditionally used for treating diabetes. Varying geographical origins and postharvest handling, however, seem to affect quantitative and qualitati... see more
Norhusna Mohamad Nor,Nur Hidayahtul Nazrah Kamil,Amirul Izan Mansor,Hawaiah Imam Maarof
Graphene oxide with eggshells (GO/ES) adsorbent has been studied for fluoride ions (F–) removal. An adsorption study was conducted in batch experiments at different adsorption parameters, which are initial F– concentration, contact time, and temperature. ... see more
Khoiriah Khoiriah,Diana Vanda Wellia,Jarnuzi Gunlazuardi,Safni Safni
Diazinon (C12H21N2O3PS) is an effective pest controller that has been frequently used by farmers in agriculture. It is a nonspecific and highly toxic pesticide having low persistence in the environment and categorized as moderately hazardous class II. The... see more
Yusuf Bramastya Apriliyanto,Sri Sugiarti,Sulistioso Giat Sukaryo
A bearing material in an artificial knee joint has to have good thermal and mechanical properties to prevent wear in order to be used as a tibial tray. Despite its well-known good properties, ultrahigh molecular weight polyethylene (UHMWPE) still needs to... see more
Noraini Razali,Ahmad Zuhairi Abdullah
The selective oxidation reaction of glycerol to produce lactic acid is a high-temperature reaction, and requiring a catalyst with high thermal stability. The mixed metal oxide is one of the potential catalysts to be explored. In this study, prepared CaCe ... see more
Salih Muharam,Afria Fitri,Lela Mukmilah Yuningsih,Yulia Mariana Tessa Ayudia Putri,Isnaini Rahmawati
It is very important to develop controlled-release fertilizers to ensure efficiency and environmental protection. This study aims to make a superabsorbent hydrogel-based controlled-release urea fertilizer. Superabsorbent hydrogels were prepared from the c... see more
Vita Pramaningsih,Slamet Suprayogi,Ignasius Loyola Setyawan Purnama
The Rivers in Indonesia often accommodate pollution from all community activities. This happened due to a large number of people who use watersheds for living. One of those rivers is the Karang Mumus River in Samarinda City, East Kalimantan. This study ai... see more
Haithem Abdulhasan,Ahmed Al-Yasari,Rahman Alasadi
In this study, the structural geometry and vibrational frequencies (IR) of 1,3-Diaza-adamantane-6-ones derivatives including Adamantane (A), 1,3-Diaza-adamantan (D), 1,3-Diaza-adamantan-6-one (DO), 5-Benzyl-1,3-diaza-adamantan-6-one (BD), 5-(4-Hydroxybenz... see more
Sagir Alva,Robi Suherman,Vivi Friliandita,Deni Shidqi Khaerudini,Edy Herianto Majlan,Aiman Sajidah Abd Aziz
A preliminary study on the use of a photocurable poly-tetrahydrofurfuryl acrylate (pTHFA) has been successfully performed as an alternative membrane for application in the Ion-Selective Electrode (ISE) sensors such as Nitrate-ISE. The pTHFA membrane was s... see more
Ali Benouar,Mohammed Reda Ahmed Bacha
The electrical conductivities of salts (LiCl, LiOH) in chitosan as an electrolyte in biodegradable batteries have been measured at the concentration range 10–100 mol m–3 in the temperature range 278–308 K. The data were interpreted in terms of ion–ion and... see more
Mohamad Nor Amirul Azhar Kamis,Hamizah Mohd Zaki,Nornizar Anuar,Mohammad Noor Jalil
Cocrystallization is one of the potent methods used to modify the physicochemical properties of drugs. Cocrystal of nicotinamide (NIC):p-coumaric acid (COU) was synthesized by a slow evaporation method using acetonitrile. The cocrystals with different fee... see more
Rudiati Evi Masithoh,Hanim Zuhrotul Amanah,Byoung Kwan Cho
This research aimed at providing a fast and accurate method in discriminating tuber flours having similar color by using Fourier transform near-infrared (FT-NIR) and Fourier transform infrared (FT-IR) spectroscopy in order to minimize misclassification if... see more
Gusrizal Gusrizal,Sri Juari Santosa,Eko Sri Kunarti,Bambang Rusdiarso
Highly stable silver nanoparticles capped with p-hydroxybenzoic acid were synthesized by reducing silver ion with p-hydroxybenzoic acid and used for the detection of paraquat. The synthesized silver nanoparticles, which are yellow, exhibited an absorption... see more
Ibnu Jihad,Juhri Hendrawan,Adam Sukma Putra,Kuwat Triyana,Moh. Adhib Ulil Absor
The Rashba splitting are found in the buckled square lattice. Here, by applying fully relativistic density-functional theory (DFT) calculation, we confirm the existence of the Rashba splitting in the conduction band minimum of various two-dimensional MX m... see more
Mohammed Hadi Ali Al-Jumaili,Ahmed Solaiman Hamed,Nihat Akkurt,Lokman Torun
A new six-armed compounds consist of benzene ring as a central core substituted with aromatic ring and three rod-like armed of 2-chloro-4,6-bis(dodecyloxy)-1,3,5-triazine as the peripheral arms unit which obtained by sequential nucleophilic substitution o... see more
Sana Ullah,Chang-Gu Hyun
This work evaluates the antioxidant activity of strychnobiflavone due to the increasing demand of the antioxidant agents day by day. Various in vitro antioxidants assays such as 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazolin... see more
Erwin Abdul Rahim,Nur Istiqomah,Gilang Almilda,Ahmad Ridhay,Ni Ketut Sumarni,Indriani Indriani
This study was aimed to prepare polyeugenol with high molecular weight and to evaluate its antibacterial and antioxidant activities. First, polyeugenol was synthesized from eugenol in the presence of H2SO4-CH3COOH (4:1) as catalyst. The synthesized polyeu... see more