Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Bioma : Jurnal Biologi Indonesia Bioscientist : Jurnal Ilmiah Biologi
Diannita Harahap
Universitas Islam Negeri Ar-Raniry
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Analysis of Formaldehyde Content in Tofu Products as an Indicator of Food Safety in Pidie Regency Zulfajriana; Arif Sardi; Diannita Harahap
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 1 (2026): March
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i1.20037

Abstract

This study aimed to identify the presence of formaldehyde in white tofu circulating in Pidie Regency as an indicator of food safety. The research employed a descriptive design with an exploratory approach, using qualitative testing through two techniques: the use of red dragon fruit peel filtrate as a natural indicator in the initial stage and a rapid test kit as a confirmatory method. The samples consisted of 48 white tofu samples collected from 12 sub-districts, with each sub-district represented by four samples obtained from different producers. Sampling was conducted purposively by considering market activity level, number of vendors, and ease of site access. The samples were prepared through a homogenization process prior to testing. The presence of formaldehyde was determined based on color change, reaction time, and color intensity observed during the testing process. The results showed that 12 samples (25%) were positively detected as containing formaldehyde, while the remaining 36 samples (75%) tested negative. Positive samples were generally found in areas with relatively high distribution and trading activity. Based on these findings, it can be concluded that formaldehyde is still present in a proportion of white tofu sold in Pidie Regency. Therefore, enhanced monitoring and education for business actors are needed. In addition, red dragon fruit peel filtrate shows potential as a simple, economical, and environmentally friendly preliminary screening method.
Formulation and antibacterial evaluation of kombucha bar soap with varying concentrations of patchouli essential oil, Pogostemon cablin (Blanco) Benth. (Lamiaceae) against Staphylococcus aureus ATCC 25923 (Staphylococcaceae) Meutia Khalida; Diannita Harahap
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.67892

Abstract

The demand for natural antimicrobial agents in personal care products has grown as consumers seek safer and more sustainable alternatives to synthetic formulations. This study examined the development of kombucha-based bar soap incorporating varying concentrations of patchouli essential oil (0–3 %) using a Completely Randomised Design. Physicochemical properties, including pH, moisture content, foam height, and foam stability, were evaluated. Antibacterial activity against Staphylococcus aureus ATCC 25923 was assessed through inhibition zone measurements, while bioactive compounds were identified using Gas Chromatography–Mass Spectrometry (GC–MS). All formulations met the Indonesian National Standard (SNI). The resulting soap has an average pH of 8.0, a water content below 1 %, a foam height of between 5,80–6,50 cm and foam stability of between 77,5–91,5 %. The strongest antibacterial effect was observed with an inhibition zone of 10.67 mm. GC–MS analysis revealed patchouli alcohol and dodecanoic acid as the principal constituents, whose synergistic interaction is presumed to enhance antibacterial activity and product stability. The incorporation of kombucha and 3 % patchouli oil produced a formulation with favourable foaming properties, reliable stability, and promising potential for commercial application.
Co-Authors Arif Sardi, Arif Meutia Khalida Zulfajriana