Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Eva Oktavia"'
Autor:
Eva Oktavia Ningrum, Suprapto Suprapto, Saidah Altway, Warlinda Eka Triastuti, Afan Hamzah, Agus Surono, Lulu Sekar Taji, Erlangga Ardiansyah
Publikováno v:
Indonesian Journal of Chemistry, Vol 24, Iss 1, Pp 23-37 (2024)
In this study, the anionic and cationic gels were synthesized separately using copolymerization between N-isopropylacrylamide (NIPAM) and acrylic acid or chitosan through a polymerization reaction using N,N'-methylenebisacrylamide (MBAA) as a cross-l
Externí odkaz:
https://doaj.org/article/94f2208e644a4aa39e1cd59dd814cc90
Autor:
Eva Oktavia Ningrum, Ianatul Khoiroh, Hanifah Inas Nastiti, Ryan Anindya Affan, Achmad Dwitama Karisma, Elly Agustiani, Agus Surono, Heri Suroto, S. Suprapto, Lulu Sekar Taji, Sinung Widiyanto
Publikováno v:
International Journal of Technology, Vol 14, Iss 4, Pp 749-760 (2023)
In the presented work, the formation of anodic oxide film on Ti-6Al-4V ELI (Extra Low Interstitial) alloy in 0.02 M trisodium phosphate (Na3PO4) electrolyte solution using various voltages were investigated. The color produced by the anodizing, the
Externí odkaz:
https://doaj.org/article/cc36b944457b4a72ad092afef1641c92
Autor:
Eva Oktavia Ningrum, Agung Subyakto, Wirawan Ciptonugroho, Shania Lorensa, Devianti Anggraini Ramadhani, Agus Surono
Publikováno v:
Indonesian Journal of Chemistry, Vol 23, Iss 1, Pp 33-43 (2023)
Despite the widespread use of ionic polymer flocculants in sugar refineries, there is still insufficient knowledge on the relationship between the polymer properties and the efficiency of flocculation. This paper describes the performance of poly(sod
Externí odkaz:
https://doaj.org/article/ff7fc6355c4944ab8b971e11c12131b9
Autor:
Eva Oktavia Ningrum, Eva Lestiana Pratiwi, Isyarah Labbaika Shaffitri, Suprapto Suprapto, Mentari Rachmatika Mukti, Ely Agustiani, Niniek Fajar Puspita, Achmad Dwitama Karisma
Publikováno v:
Indonesian Journal of Chemistry, Vol 21, Iss 5, Pp 1298-1315 (2021)
Zwitterionic polymers are material families characterized by high dipole moment and highly charged groups. Zwitterionic materials simultaneously possess an equimolar number of cationic and anionic moieties, maintaining overall electroneutrality and h
Externí odkaz:
https://doaj.org/article/fae810dfe76b43bdba5292ff5dc7cd5f
Autor:
Daril Ridho Zuchrillah, Lily Pudjiastuti, Niniek Fajar Puspita, Afan Hamzah, Achmad Dwitama Karisma, Agus Surono, Saidah Altway, Liana Ardiani, Nur Azizatur Rohmah, Eva Oktavia Ningrum
Publikováno v:
CHEESA, Vol 3, Iss 1, Pp 33-41 (2020)
Kemasan plastik banyak digunakan pada industri makanan dan minuman di Indonesia karena praktis dan mudah. Namun, disisi lain ini merupakan bencana bagi lingkungan karena plastik merupakan bahan yang sulit terurai (nondegradable). Edible film merupaka
Externí odkaz:
https://doaj.org/article/4fdf15faa387441aae9944ccc8c189aa
Autor:
Suprapto, Takehiko Gotoh, Nurlaili Humaidah, Renna Febryanita, Muhammad Sa’i Firdaus, Eva Oktavia Ningrum
Publikováno v:
International Journal of Technology, Vol 11, Iss 2, Pp 299-309 (2020)
This study explored the ion adsorption of heavy metals using a copolymer gel containing zwitterionic betaine N,N'-dimethyl(acrylamidopropyl)ammonium propane sulfonate (DMAAPS) as the ion adsorbent agent and N-isopropylacrylamide (NIPAM) as the the
Externí odkaz:
https://doaj.org/article/c05946d1f7c04efab4ad8758e07e8713
Publikováno v:
Indonesian Journal of Chemistry, Vol 20, Iss 2, Pp 324-335 (2020)
The properties of N-isopropylacrylamide copolymerized with N,N-dimethyl(acrylamidopropyl)ammonium propane sulfonate [poly(NIPAM-co-DMAAPS)] prepared with various monomer ratios such as transition temperature, molecular structure, viscosity were syste
Externí odkaz:
https://doaj.org/article/16c86efaea5849e8be52cf934a7c46fb
Publikováno v:
International Journal of Technology, Vol 10, Iss 3, Pp 443-452 (2019)
This study was conducted to examine the ion absorption behavior of zwitterionic sulfobetaine type N,N-dimethyl(acrylamidopropyl) ammonium propane sulfonate (DMAAPS) gels. In addition, it also examines the effect of salt solution concentration and
Externí odkaz:
https://doaj.org/article/1a17e84dd4ad43a1bcd52567bfa50ead
Autor:
Eva Oktavia Ningrum, Takehiko Gotoh, Wirawan Ciptonugroho, Achmad Dwitama Karisma, Elly Agustiani, Zela Marni Safitri, Muhammad Asyam Dzaky
Publikováno v:
Gels, Vol 7, Iss 4, p 273 (2021)
Zwitterionic betaine polymers are promising adsorbents for the removal of heavy metal ions from industrial effluents. Although the presence of both negative and positively charged groups imparts them the ability to simultaneously remove cations and a
Externí odkaz:
https://doaj.org/article/df50a00ee7d6488eaf08b8bb8a01b9dc
Autor:
Eva Oktavia Ningrum, Agus Purwanto, Eka Octaviyatna Mulyadi, Dinny Islamiah Dewitasari, Sumarno Sumarno
Publikováno v:
Indonesian Journal of Chemistry, Vol 17, Iss 3, Pp 446-452 (2017)
Adsorbent gel with the ability to absorb and to desorb Na+ and NO3− ions simultaneously with temperature swing was synthesized by free radical copolymerization reaction of N-isopropylacrylamide (NIPAM) and N,N-dimethyl-(acrylamidopropyl)ammonium pr
Externí odkaz:
https://doaj.org/article/6cad3c44057c4317a022b2d9144f0c20