Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Ronn Goei"'
Autor:
A. Muhammad Afdhal Saputra, Marpongahtun, Andriayani, Diana Alemin Barus, Ronn Goei, Alfred Tok, Muhammad Ibadurrahman, H.T.S Risky Ramadhan, Muhammad Irvan Hasibuan, Ton Peijs, Saharman Gea
Publikováno v:
Materials Science for Energy Technologies, Vol 8, Iss , Pp 66-81 (2025)
This study employs a cost-efficient method to create a pliable BC/rGO-NiCo-LDH electrode film on a bacterial cellulose base. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy
Externí odkaz:
https://doaj.org/article/9028723c74ee476aaa6557d936d45d63
Autor:
Lisnawaty Simatupang, Rikson Siburian, Elfrida Ginting, Binsar Maruli Tua Pakpahan, Kristian Adinata Pratama Simatupang, Dea Gracella Siagian, Edward Relius Laoli, Ronn Goei, Alfred Iing Yoong Tok
Publikováno v:
International Journal of Technology, Vol 15, Iss 4, Pp 880-889 (2024)
This study investigated the potential of porous silica material extracted from volcanic ash of Mount Sinabung, Indonesia, as a corrosion inhibitor. The new material was subjected to comprehensive analysis using the X-Ray Diffraction (XRD), Fourier
Externí odkaz:
https://doaj.org/article/44bcf243485a476bbfd9aea7a266d952
Autor:
Habib Hernando, Marpongahtun, Elisa Julianti, Arif Nuryawan, Suci Aisyah Amaturrahim, Averroes Fazlur Rahman Piliang, Muhammad Rafiq Yanhar, Ronn Goei, Nattakan Soykeabkaew, A. Muhammad Afdhal Saputra, Saharman Gea
Publikováno v:
Case Studies in Chemical and Environmental Engineering, Vol 10, Iss , Pp 100839- (2024)
Biodegradable bioplastics provide a promising solution to mitigate environmental harm from petroleum-based plastics. This study focuses on optimizing bioplastic films made from oil palm trunk starch (OPTS), using glycerol (10, 20, and 30 % v/w) as a
Externí odkaz:
https://doaj.org/article/82872f772dd84fa184647c2de49930fe
Autor:
Sri Rahayu, Basuki Wirjosentono, Evi Oktavia, Cut Fatimah Zuhra, Khatarina Meldawati Pasaribu, Averroes Fazlur Rahman Piliang, Nico Setyawan Sihotang, Juliati Br Tarigan, Jonathan Siow, Ronn Goei, Alfred Iing Yoong Tok, Saharman Gea
Publikováno v:
Case Studies in Chemical and Environmental Engineering, Vol 10, Iss , Pp 100779- (2024)
This research explores utilizing abundant and economical cassava as a raw material for producing cationic starch in Indonesia. Cationic starch was synthesized by etherifying cassava starch with CHPTAC monomer at 50–90 °C. Successful cationic modif
Externí odkaz:
https://doaj.org/article/a77823a8abfe4fce873c8bfa528f43fe
Autor:
Matlal Fajri Alif, Riska Astin Fitria, Syukri Arief, Shelly Triandini, Maykel Manawan, Purba Purnama, Ronn Goei
Publikováno v:
Sustainable Chemistry for the Environment, Vol 6, Iss , Pp 100105- (2024)
Peatlands covers a vast area globally and used as drinking water source in some parts of Indonesia. Peat water, commonly found in swampy areas, stands out for its striking color intensity, acidic pH levels, and its high affinity for metal binding. De
Externí odkaz:
https://doaj.org/article/c0eb37ce8883432ca6340b8db4db76a8
Autor:
Rayland Jun Yan Low, Pengfei He, Junianto, Ningyu Qiu, Amanda Jiamin Ong, Hong Han Choo, Yosia Gopas Oetama Manik, Rikson Siburian, Ronn Goei, Stephen F. Burns, Alfred Iing Yoong Tok, Vitali Lipik, Boon Peng Chang
Publikováno v:
Molecules, Vol 29, Iss 20, p 4798 (2024)
Far infrared radiation (FIR) within the wavelength range of 4–14 μm can offer human health benefits, such as improving blood flow. Therefore, additives that emit far infrared radiation have the potential to be incorporated into polymer/fabric matr
Externí odkaz:
https://doaj.org/article/c526be0de422428b85274faf031862a6
Autor:
Aniza Salviana Prayugo, Marpongahtun, Saharman Gea, Amru Daulay, Mahyuni Harahap, Jonathan Siow, Ronn Goei, Alfred Iing Yoong Tok
Publikováno v:
Biosensors and Bioelectronics: X, Vol 14, Iss , Pp 100363- (2023)
A facile synthesis method involving a one-step solvothermal method is demonstrated in producing fluorescent nitrogen-doped carbon dots (N-CDs) by employing biomass waste (Jengkol peels) and ethylenediamine as a source for carbon and nitrogen. The syn
Externí odkaz:
https://doaj.org/article/f3f2d5039bef4257b3267f290a6c5969
Autor:
Vivi Purwandari, Martha Rianna, Marpongahtun, Isnaeni Isnaeni, Yiming Zou, Mahyuni Harahap, Gratianus Halawa, Ronn Goei, Alfred Iing Yoong Tok
Publikováno v:
Materials Science for Energy Technologies, Vol 6, Iss , Pp 282-289 (2023)
The synthesis of graphene nanosheets (GNs) from sub-bituminous coal aims to increase the added value of coal in a cheap, easy and proclaimed this method on an industrial scale. The addition of biocatalyst (BFS) in the pyrolysis process can reduce the
Externí odkaz:
https://doaj.org/article/ed9144fc8d934140965856feca28e15d
Autor:
Mahyuni Harahap, Yurika Almanda Perangin-Angin, Vivi Purwandari, Ronn Goei, Alfred ling Yoong Tok, Saharman Gea
Publikováno v:
Heliyon, Vol 9, Iss 3, Pp e14556- (2023)
The electrospinning of acetylated lignin/polyvinyl alcohol (PVA) nanofibres was carried out to expand the application of lignin materials obtained from oil palm empty fruit bunches (OPEFB). Lignin was isolated by the steam explosion method and subseq
Externí odkaz:
https://doaj.org/article/a9fef83d7ace45d6aebf2937a48f88f7
Autor:
Yuanyuan Guo, Yiming Zou, Chunyu Cheng, Leyan Wang, Riko I Made, Ronn Goei, Kwan Wee Tan, Shuzhou Li, Alfred Iing Yoong Tok
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Metal alloys are usually fabricated by melting constituent metals together or sintering metal alloy particles made by high energy ball milling (mechanical alloying). All these methods only allow for bulk alloys to be formed. This manuscript
Externí odkaz:
https://doaj.org/article/a5da5f6ddf6b4bec99563de686fcdac2