Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Fredy KURNIAWAN"'
Autor:
Suyanta Suyanta, Sunarto Sunarto, Regina Tutik Padmaningrum, Karlinda Karlinda, Illyas Md Isa, Rahadian Zainul, Qonitah Fardiyah, Fredy Kurniawan
Publikováno v:
Indonesian Journal of Chemistry, Vol 24, Iss 3, Pp 652-660 (2024)
This work developed a selectively modified electrode for measuring the Fe(II) ions in continuous integration using voltammetry techniques. The study assessed various aspects, such as linearity, scan rate, repeatability, and real sample analysis. The
Externí odkaz:
https://doaj.org/article/9fa29cd11b4a4b61b5440ca35e104fa8
Autor:
Kartika A. Madurani, Soraya Firdausi, Harmami Harmami, Ita Ulfin, Erika Shinchi, Shaimah Rinda Sari, Masato Tominaga, Fredy Kurniawan
Publikováno v:
Applied Surface Science Advances, Vol 22, Iss , Pp 100620- (2024)
Many organic inhibitors have been proposed for corrosion protection of 304 stainless steel (SS), but its effectiveness in acidic and high temperature environment is challenged. We utilized Tithonia diversifolia (Hemsl) A. grey leaf extract (TDLE) as
Externí odkaz:
https://doaj.org/article/8cfadcfb582d42d691dc6b89ba71b191
Autor:
Muji Harsini, Ainy Nur Farida, Erna Fitriany, Denok Risky Ayu Paramita, Afaf Baktir, Fredy Kurniawan, Satya Candra Wibawa Sakti, Yudhi Dwi Kurniawan, Bernadeta Ayu Widyaningrum
Publikováno v:
Indonesian Journal of Chemistry, Vol 24, Iss 1, Pp 38-53 (2024)
Modification of electrode using polymelamine (PM) and gold nanoparticles (AuNPs) has been successfully developed via electropolymerization and electrodeposition onto carbon paste electrode (CPE) using cyclic voltammetry (CV) technique. The modified e
Externí odkaz:
https://doaj.org/article/755a7ad85292479eb0c1b32f0b70cf8b
Autor:
Tri Paus Hasiholan Hutapea, Kartika A. Madurani, Muhammad Yudha Syahputra, Moh. Nuril Hudha, Andi Nina Asriana, Suprapto, Fredy Kurniawan
Publikováno v:
Journal of Science: Advanced Materials and Devices, Vol 8, Iss 2, Pp 100549- (2023)
Albumin is a water-soluble protein that has attracted attention due to its characteristics, including biocompatibility, biodegradability, non-immunogenicity, long half-life, minimal toxicity, good stability, and good reactivity. These good characteri
Externí odkaz:
https://doaj.org/article/a4e9977a187a4f09b09ce3f4f7d0a150
Autor:
Femiana Gapsari, Putu H. Setyarini, Fredy Kurniawan, Ahnaf Ahnaf, Moch.Syaiful Anwar, Ulul Khairi Zuryati
Publikováno v:
South African Journal of Chemical Engineering, Vol 41, Iss , Pp 223-232 (2022)
Nephelium lappaceum peel Extract (NPE) is effective to control carbon steel weldment corrosion in acidic solution.This study analyzes NPE performance (0 to 60 ppm) as corrosion inhibitor on weldment in 3.5% NaCl. Potentiodynamic polarization was used
Externí odkaz:
https://doaj.org/article/e02344a7600a474197236a2645bcf0e2
Autor:
Ika Puspita, Ninik Irawati, Kartika Anoraga Madurani, Fredy Kurniawan, Sekartedjo Koentjoro, Agus Muhamad Hatta
Publikováno v:
Photonic Sensors, Vol 12, Iss 4, Pp 1-10 (2022)
Abstract A rapid and high-performance sensor for lard adulterant in edible oil was developed using the tapered plastic optical fiber (POF) coated with graphene and multi-walled carbon nanotubes. The coating material was deposited onto a tapered POF w
Externí odkaz:
https://doaj.org/article/eb65f511e25e4bfe85ea0cd180058e3e
Autor:
Kartika A. Madurani, Suprapto, Muhammad Yudha Syahputra, Ika Puspita, Abdul Hadi Furqoni, Listya Puspasari, Hafildatur Rosyidah, Agus Muhamad Hatta, Juniastuti, Maria Inge Lusida, Masato Tominaga, Fredy Kurniawan
Publikováno v:
Arabian Journal of Chemistry, Vol 15, Iss 8, Pp 104020- (2022)
Considering the limitations of the assays currently available for the detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and its emerging variants, a simple and rapid method using fluorescence spectrophotometry was developed to
Externí odkaz:
https://doaj.org/article/1057e6b79f6841c0b75bd86f7e09ae3c
Autor:
Fredy Kurniawan, Ari Nugroho, Rangga Aji Baskara, Lourentia Candle, Diwasasri Pradini, Kartika A. Madurani, Raden Djarot Sugiarso, Hendro Juwono
Publikováno v:
Heliyon, Vol 8, Iss 5, Pp e09401- (2022)
Rapid analysis to distinguish porcine and bovine gelatin using a modified Quartz Crystal Microbalance (QCM) sensor has been studied. The PANI was deposited on the sensor surface using electropolymerization, and then nickel nanoparticles were deposite
Externí odkaz:
https://doaj.org/article/1d951d3283db4a0c90758079beec7325
Publikováno v:
Arabian Journal of Chemistry, Vol 13, Iss 12, Pp 8888-8897 (2020)
The species Andrographis paniculata L. Ness, family Acanthaceae grows in many parts in the island of Java in Indonesia. In this research, new potentials of photoprotective agents from A. paniculata plant extracts, along with their characteristics, we
Externí odkaz:
https://doaj.org/article/c22aae3479554c3bafadbdf6b03a1f5b
Autor:
Veer Bhatt, Ke Shi, Daniel J. Salamango, Nicholas H. Moeller, Krishan K. Pandey, Sibes Bera, Thomas E. Bohl, Fredy Kurniawan, Kayo Orellana, Wei Zhang, Duane P. Grandgenett, Reuben S. Harris, Anna C. Sundborger-Lunna, Hideki Aihara
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020)
Integration of the reverse-transcribed viral DNA into host chromosomes is a critical step in the life-cycle of retroviruses such as the human T-cell leukemia virus type-1 (HTLV-1). Here the authors describe the structural role of the host co-factor p
Externí odkaz:
https://doaj.org/article/aa9b53faafb14e34a356550f154c5e2f