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All Journal Jurnal Diferensial Jurnal Ilmiah Wahana Pendidikan
Rifdah Fadhilah
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Religion Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Mathematics Public Health Social Sciences Other

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Uji Kadar Formalin pada Tahu yang di Jual di Kabupaten Karawang dengan Metode Spektrofotometer Visible Rifdah Fadhilah; Vesara Ardhe Gatera; Lely Sulfiani Saula; Sakiran Sakiran
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 21 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.366 KB) | DOI: 10.5281/zenodo.7275329

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Abstract: Foods such as tofu basically do not last long to be stored, because the ingredients contain high water content. The relatively short storage of food is certainly detrimental to producers or the food industry. This study aims to detect formaldehyde in tofu and organoleptic tests on tofu in several traditional markets in Karawang Regency. The method used in this formalin analysis is the Nash reagent method. The results showed that from 5 total samples of sampling results in several traditional markets in Karawang Regency, 1 sample of them was positive for formalin with a concentration of 38.16 g/g. The results of the organoleptic test showed that the samples containing formalin had a chewy texture and had good physical condition on the 3rd day under refrigeration or room temperature storage conditions. Meanwhile, if the tofu is not formalized, it will be destroyed and only able to last one/two days. Based on the results of the study, it can be concluded that from the five tofu samples, the T1 sample was positive for formalin with a level of 38.16 g/g. Tofu containing formalin has thickening properties and has a shelf life of more than 3 days at refrigerator or room temperature. Keyword: Tofu, Nash Reagent, Formalin
TOPOLOGY INDEX OF THE COPRIME GRAPH FOR DIHEDRAL GROUP OF PRIME POWER ORDER Marena Rahayu Gayatri; Rifdah Fadhilah; Sahin Two Lestari; Lia Fitta Pratiwi; Abdurahim Abdurahim; I Gede Adhitya Wisnu Wardhana
JURNAL DIFERENSIAL Vol 5 No 2 (2023): November 2023
Publisher : Program Studi Matematika, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jd.v5i2.12462

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In the field of molecular chemistry, graph theory is utilized to represent the structure of a molecule, where the set of nodes corresponds to its chemical elements and the set of edges represents the bonds within the chemical molecule. Graph theory, a mathematical discipline, finds application in various domains, one of which is group representation. This research will delve into the topic of the topological indices of the coprime graph of dihedral groups. The methodology employed involves reviewing several references related to dihedral groups, coprime graphs, and topological indices. This study yields results in the form of Harmonic index, Harary index, first Zagreb index, Gutman index, and Wiener index.
Co-Authors Abdurahim Abdurahim I Gede Adhitya Wisnu Wardhana Lely Sulfiani Saula Lia Fitta Pratiwi Marena Rahayu Gayatri Sahin Two Lestari Sakiran Sakiran Vesara Ardhe Gatera