Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Rony Pasonang Sihombing"'
Autor:
Bambang Soeswanto, Rony Pasonang Sihombing, Joko Suryadi, Tri Hariyadi, Tifa Paramitha, Yusmardhany Yusuf, Alfiana Adhitasari
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 9, Iss 3, Pp 224-231 (2023)
This paper studies the optimal ratio that gives the highest caffeine amount and improves the efficiency and quality of extraction from Arabica Gayo coffee beans. No previous studies have explored the best ratio of Gayo Arabica coffee beans to ethyl a
Externí odkaz:
https://doaj.org/article/1e4f098902324d7a9fe466089fe3c20f
Autor:
Ninik Lintang Edi Wahyuni, Nurcahyo, Unung Leoanggraini, Robby Sudarman, Bambang Soeswanto, Emma Hermawati Muhari, Agustinus Ngatin, Rony Pasonang Sihombing
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 9, Iss 2, Pp 140-150 (2023)
Tofu wastewater contains a lot of protein therefore it is easily degraded to produce foul odors and harmful gases due to microbes. Protein levels can be reduced through the electrocoagulation method which is equipped with adsorption. The purpose of t
Externí odkaz:
https://doaj.org/article/343495d129bf4929b1b493d08a08243b
Autor:
Ninik Lintang Edi Wahyuni, Rony Pasonang Sihombing, Nurcahyo, Agustinus Ngatin, Yunus Tonapa Sarungu, Alfiana Adhitasari, Bambang Soeswanto, Emma Hermawati Muhari, retno indarti
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 9, Iss 2, Pp 107-112 (2023)
Papaya leaf extract could be used as an organic corrosion inhibitor. Corrosion inhibitors were used as a method to reduce corrosion rate. The most corrosive environment was the marine environment. The purpose of this study was to determine the best c
Externí odkaz:
https://doaj.org/article/186bf40291ae4d15904dd75fa2d7b2e4
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 8, Iss 2, Pp 113-119 (2022)
Water-based adhesive was one of the most important media for bonding substrates to one another because of their environmental friendly character. Previously, in the application of hardwood adhesives such as Ulin and Merbau, the type of adhesive used
Externí odkaz:
https://doaj.org/article/9f8012224632438aa07de59c722e56f1
Autor:
Emma Hermawati, Yunus Tonapa Sarungu, Bambang Soeswanto, Rispiandi, Alfiana Adhitasari, Sudrajat Harris Abdulloh, Rony Pasonang Sihombing, Retno Indarti
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 8, Iss 2, Pp 165-170 (2022)
Organic inhibitors in the corrosion process could be obtained from water hyacinth plant. This plant contained antioxidants such as saponins, which could bind to protective metals from corrosion. The objective of this study was to observe the corrosio
Externí odkaz:
https://doaj.org/article/eafa7276a9c84dd9af7560949ee3a8fb
Publikováno v:
Jurnal Kimia Riset, Vol 7, Iss 1, Pp 20-27 (2022)
The processing of laterite ore by pyrometallurgy requires high temperatures whereas the Atmospheric Acid Leaching (AAL) method can be performed below 100 ℃ although its nickel recovery is inconsistent. This research aims to determine the effect of
Externí odkaz:
https://doaj.org/article/14be5eaf52d648c78d20259f7a719265
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 7, Iss 2, Pp 98-102 (2021)
Acrylic-based polymer adhesive is a type of adhesive that can be used for pressure sensitive adhesive (PSA). Itaconic acid (IA) is a type of acid with 2 (two) OH groups which can form hydrogen bonds. The acrylic base can be used purely from its class
Externí odkaz:
https://doaj.org/article/5dc5d71c3c66403ca52da8d42319c92f
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 7, Iss 2, Pp 103-108 (2021)
Oil sludge resulting from crude oil processing in the petroleum industry could have a negative impact on the environment. Oil sludge could also be classified as hazardous waste and able to damage the environment and human health. Therefore, it was ne
Externí odkaz:
https://doaj.org/article/c7b93e5ed78f432f91054c8846fa7714
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 7, Iss 1, Pp 23-29 (2021)
Polyvinyl acetate (PVAc) is an applicative polymer used as an adhesive material for one to another. These polymers can be synthesized through an emulsion polymerization process. In the industrial world, the process of making adhesive still involves e
Externí odkaz:
https://doaj.org/article/a59b8f32d8424ca98028ed6022329c90
Publikováno v:
Kovalen: Jurnal Riset Kimia, Vol 6, Iss 3, Pp 177-183 (2020)
Iron rust was an iron oxide compound that was less attractive, dirty, brown in color, and could pollute the environment, causing water to turn brown. To minimize iron contamination, conversion was carried out into iron (III) sulfate which was useful
Externí odkaz:
https://doaj.org/article/881ca131200a4124820cd3fd36083588