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All Journal Bioscientist : Jurnal Ilmiah Biologi SPEKTRA: Jurnal Kajian Pendidikan Sains
Euis Nursa’adah
Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences

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Analisis Kandungan Asam Sianida (HCN) pada Rebung Bambu Kapal (Gigantochloa schortechinii) sebagai Bahan Makanan Roleka Julia Marcellina; Bhakti Karyadi; Rendy Wikrama Wardana; Euis Nursa’adah; Afrizal Mayub
SPEKTRA: Jurnal Kajian Pendidikan Sains Vol. 11 No. 2 (2025): SPEKTRA: Jurnal Kajian Pendidikan Sains
Publisher : Physics Education Study Program, Faculty of Education and Teacher Training, UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/spektra.v11i2.9702

Abstract

This study aims to determine the effect of different lengths of soaking on cyanide acid (HCN) content in ship bamboo shoots (Gigantochloa schortechinii) which are the main ingredient in making Lemea. Lemea is a specialty food of the Rejang tribe in Bengkulu Province where the main ingredient of Lemea is fermented chopped bamboo shoots (young bamboo). This study used a completely randomized design (CRD) with five repetitions and four treatment levels, namely. A = no treatment/control, B = 4 days soaking, C = 5 days soaking, D = 6 days soaking and E = 7 days soaking. The results of the analysis showed that different lengths of soaking time had an effect on reducing cyanide acid (HCN) content. The highest to lowest average cyanide acid (HCN) content was obtained from treatments A (70.066 ppm), B (53.759 ppm), C (42.374 ppm), D (29.739) and E (16.458 ppm). The best cyanide acid (HCN) content was obtained in the immersion treatment for 7 days with an average HCN content of 16.458 ppm, this result is highly recommended because the HCN content is safe for consumption according to FAO (Food and Agriculture Organization).
Potensi Biomassa Pohon dan Emisi Karbondioksida Untuk Menilai Keseimbangan Karbon di Lingkungan Endah Tri Wahyuningsih; Bhakti Karyadi; Rendy Wikrama Wardana; Euis Nursa’adah; Afrizal Mayub
Bioscientist : Jurnal Ilmiah Biologi Vol. 13 No. 4 (2025): December
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.v13i4.16620

Abstract

This study aims to analyze carbon emissions from motor vehicles and the potential for carbon absorption by vegetation on four main roads in Bengkulu City: Padang Jati, Hibrida, Pagar Dewa, and Sukarami. The approach used is quantitative-descriptive, with data collected through traffic surveys and direct measurements of vegetation parameters during the observation period. Emissions are calculated using emission factors based on IPCC/KLHK standards according to vehicle type, while tree biomass is analyzed using allometric equations based on trunk diameter, track length, and vegetation type. Carbon analysis on four roads in Bengkulu City shows a significant imbalance between vehicle emissions and vegetation absorption. Sukarami recorded the highest emissions (751,813 kg CO₂) with a biomass of only 24,053 kg (absorption of 40,607 kg), making it a carbon source. Conversely, Padang Jati had the largest biomass (881,578 kg) compared to emissions of 431,889 kg CO₂, making it a carbon sink with absorption of 344%. Hibrida and Pagar Dewa showed intermediate conditions, with emissions of 424,145–570,063 kg CO₂ and absorption of 544,349–947 kg, indicating an unbalanced absorption capacity. These results emphasize the need to increase vegetation cover and manage green spaces as strategies for mitigating urban climate change.
Co-Authors Afrizal Mayub Bhakti Karyadi Rendy Wikrama Wardana Roleka Julia Marcellina Wahyuningsih, Endah Tri