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All Journal Biodiversitas Journal of Biological Diversity
RICO RAMADHAN
Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga. Jl. Mulyorejo, Surabaya 60115, East Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Diversity and honey properties of stingless bees from meliponiculture in East and North Kalimantan, Indonesia SYAFRIZAL; RICO RAMADHAN; IRAWAN WIJAYA KUSUMA; SAAT EGRA; KUNIYOSHI SHIMIZU; MAMORU KANZAKI; Enos Tangkearung
Biodiversitas Journal of Biological Diversity Vol. 21 No. 10 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d211021

Abstract

Abstract. Syafrizal, Ramadhan R, Kusuma IW, Egra S, Shimizu K, Kanzaki M, Arung ET. 2020. Diversity and honey properties of stingless bees from meliponiculture in East and North Kalimantan, Indonesia. Biodiversitas 21: 4623-4630. Kalimantan Island in Indonesia is covered by tropical rain forests that are rich in biodiversity. Species, include a stingless bee (Trigona spp.). Recently, stingless bee beekeeping (Meliponiculture) in this region has become popular because the honey has a unique taste, a mix of sweet, sour, and bitter which is highly valued. The objective of this study was to determine the diversity of stingless bee species, the number of colonies, type of hive, and honey properties such as taste, acidity, color, phytochemicals, and radical scavenging activity or antioxidant in meliponiculture in selected areas of Eastern and Northern Kalimantan, Indonesia. The area studied included Samarinda, Balikpapan, Penajam, Bontang, Sangatta, and Tarakan. The study conducted by visiting the farmers, collecting the stingless bees species and bee products (honey, propolis, and bee pollen), pH, color and taste determination, phytochemical screening, and DPPH assay. We found 12 species, with Heterotrigona itama and Tetragonula laeviceps being the main ones cultivated by people in all research areas, except Balikpapan. We counted 111 colonies of T. laeviceps and 99 of H. itama in the meliponiculture. There were three types of hive used by farmers in meliponiculture. Most of the honey tasted sweet and sour with acidity or pH ranging from 3-4, and color from dark brown to light yellow. The phytochemicals contained tannin, alkaloid, flavonoid, triterpenoid, carotenoid, coumarin, saponin, and carbohydrate. The Tetragonula sarawakensis honey was the most potent in term radical scavengers. Our findings showed that stingless bee honey contains antioxidants with phytochemicals that are very useful for human health.
The potency of selected ethnomedicinal plants from East Kalimantan, Indonesia as antidiabetic agents and free-radical scavengers RICO RAMADHAN; PREECHA PHUWAPRAISIRISAN; RUDIANTO AMIRTA; MUHAMMAD FADIL BAGAS DARMAWAN; KAUTSAR UL-HAQ; IRAWAN WIJAYA KUSUMA; HERY SUWITO; NURLITA ABDULGANI; AHMAD MUKHDLOR; SAPARWADI SAPARWADI
Biodiversitas Journal of Biological Diversity Vol. 23 No. 4 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230458

Abstract

Abstract. Ramadhan R, Phuwapraisirisan P, Amirta R, Darmawan MFB, Ul-Haq K, Kusuma IW, Suwito H, Abdulgani N, Mukhdlor A, Saparwadi. 2022. The potency of selected ethnomedicinal plants from East Kalimantan, Indonesia as antidiabetic agents and free-radical scavengers. Biodiversitas 23: 2225-2231. Ten ethnomedicinal plant extracts from East Kalimantan flora, traditionally used to treat blood sugar levels and other diabetes-related diseases, were examined in vitro for their antidiabetic and free radical scavenging activities by inhibiting rat alpha-glucosidase and several free radicals such as DPPH, ABTS, and Nitric oxide respectively. Out of the ten plant species investigated for their antidiabetic activity against maltase and sucrase rat alpha-glucosidase, three exhibited the strongest ?-glucosidaseinhibitory activity with maltose as a substrate, namely extracts of Garcinia nervosa, Syzygium caudatilimbum, and Shorea balangeran with IC50 values of 0.046; 0.037; 0.045 mg/mL. Meanwhile, quercetin as a positive control appeared to have a comparable IC50value. Furthermore, among the ten extracts, Syzygium caudatilimbum, Shorea balangeran, and Ixora javanica showed good inhibition against sucrase rat alpha-glucosidase. Moreover, the antioxidant test showed that the ten methanol extracts of plants from East Kalimantan have an antioxidant activity indicated by IC50values. The present study confirms that the ethnopharmacological use of selected plants from East Kalimantan might have potential as an antidiabetic and natural antioxidant.
Short Communication: Analysis of the ultimate wood composition of a forest plantation species, Eucalyptus pellita, to estimate its bioelectricity potency MUHAMMAD TAUFIQ HAQIQI; DUDU HUDAYA; HELMI ALFATH SEPTIANA; RICO RAMADHAN; YULIANSYAH YULIANSYAH; WIWIN SUWINARTI; RUDIANTO AMIRTA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 5 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230516

Abstract

Abstract. Haqiqi MT, Hudaya D, Septiana HA, Ramadhan R, Yuliansyah, Suwinarti W, Amirta R. 2022. Short Communicarion: Analysis of the ultimate wood composition of a forest plantation species, Eucalyptus pellita, to estimate its bioelectricity potency. Biodiversitas 23: 2389-2394. Eucalyptus pellita F. Muell is one of the short rotation wood crop species widely planted in tropical countries, including Indonesia. Woody biomass obtained from this species is commonly utilized to produce fiber in the pulp and paper industry. Due to the growing interest in expanding E. pellita plantations, the potential application of E. pellita woody biomass to provide sustainable energy feedstock has been studied. Therefore, this study aimed to investigate the ultimate composition of E. pellita wood (carbon (C), hydrogen (H), and oxygen (O)) to estimate its higher heating value (HHV) and bioelectricity potency. The wood samples were harvested at different plant ages, from the first to the fifth year. The percentage of biomass composition, including cellulose, hemicellulose, lignin, and extractives, was also calculated. The results demonstrated that lignin in the E. pellita wood increased to align with the increased plant age. Thus, this pattern was followed by significantly increased C content in the wood since lignin contained a primary source of C. Hence, this condition might enhance the HHV and electricity potency. The ratio of H/C and O/C was found to be one of the most promising factors in improving HHV compared to the extractive/lignin ratio. In the fifth year, the electricity potency of E. pellita showed the highest value (1.71 MWh ton-1). Therefore, this study suggests that E. pellita possesses the potential to be one of the promising crops for green electricity production.
Diversity of Vachellia nilotica rhizosphere bacteria in the savanna of Baluran National Park, Indonesia and their potential for hydrolytic enzyme production NI’MATUZAHROH NI’MATUZAHROH; MOCH. AFFANDI; RICO RAMADHAN; FATIMAH FATIMAH; AGUS SUPRIYANTO; SALAMUN SALAMUN; TRI NURHARIYATI; ALMANDO GERALDI; JUNAIRIAH JUNAIRIAH; JOHAN SETIAWAN; BRIGITA NUR DIYAN AGUSTIANA; ARSY HABI PRIYATAMA; KIRANA ATMANINDYA; DELA DWI ALAWIYAH; ELVIS PERDANA PUTRA; ANA MARIATUL KHIFTIYAH; SILVIA KURNIA SARI; CHRISTOPHER CLEMENT
Biodiversitas Journal of Biological Diversity Vol. 26 No. 4 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260425

Abstract

Abstract. Ni’matuzahroh, Affandi M, Ramadhan R, Fatimah, Supriyanto A, Salamun, Nurhariyati T, Geraldi A, Junairiah, Setiawan J, Agustiana BND, Priyatama AH, Atmanindya K, Alawiyah DD, Putra EP, Khiftiyah AM, Sari SK, Clement C. 2025. Diversity of Vachellia nilotica rhizosphere bacteria in the savanna of Baluran National Park, Indonesia and their potential for hydrolytic enzyme production. Biodiversitas 26: 1754-1767. Vachellia nilotica, a leguminous plant introduced to Baluran National Park as a firebreak, is now causing environmental problems due to its invasiveness, which hinders the growth of native plants. Despite significant ecological changes, there is no data regarding the impact of this plant invasion on soil microorganisms. This study aimed to assess the bacterial diversity in the rhizosphere of V. nilotica and investigate the bacteria's ability to produce hydrolytic enzymes. The bacterial community was identified using Next-Generation Sequencing (NGS), and a conventional isolation technique. A total of 99,520 Operational Taxonomic Units (OTUs) were obtained, encompassing a rich diversity of 4,631 species. These species belonged to four phyla (i) Pseudomonadota; (ii) Actinomycetota; (iii) Bacillota; and (iv) Acidobacteriota. Additionally, 26 isolates were obtained through conventional isolation, and all of them can produce hydrolytic enzymes, including protease, lipase, amylase and cellulase. A total of 9 isolates showed highest proficiency in producing hydrolytic enzymes, of which 8 belonged to the Bacillota phylum and 1 isolate showed similar characteristic with Acidobacteriota phylum. The isolates SAV 2.NA.1.5.6 and SAV 2.NA.2.4.3 exhibited multiple enzyme activities and were classified as Bacillota. The findings indicate that the rhizosphere of V. nilotica contains a high diversity of bacteria, including those capable of producing hydrolytic enzymes. This information can serve as a foundation for managing V. nilotica and promoting sustainable development by leveraging the potential of rhizosphere bacteria in this plant. To our knowledge, no prior research has been conducted on this topic in the savanna area of BNP.
Co-Authors AGUS SUPRIYANTO AHMAD MUKHDLOR ALMANDO GERALDI ANA MARIATUL KHIFTIYAH ARSY HABI PRIYATAMA BRIGITA NUR DIYAN AGUSTIANA CHRISTOPHER CLEMENT DELA DWI ALAWIYAH DUDU HUDAYA ELVIS PERDANA PUTRA Enos Tangkearung FATIMAH FATIMAH HELMI ALFATH SEPTIANA HERY SUWITO IRAWAN WIJAYA KUSUMA IRAWAN WIJAYA KUSUMA JOHAN SETIAWAN JUNAIRIAH JUNAIRIAH KAUTSAR UL-HAQ KIRANA ATMANINDYA KUNIYOSHI SHIMIZU MAMORU KANZAKI MOCH. AFFANDI MUHAMMAD FADIL BAGAS DARMAWAN MUHAMMAD TAUFIQ HAQIQI NI’MATUZAHROH NI’MATUZAHROH NURLITA ABDULGANI PREECHA PHUWAPRAISIRISAN RUDIANTO AMIRTA RUDIANTO AMIRTA SAAT EGRA SALAMUN SALAMUN SAPARWADI SAPARWADI SILVIA KURNIA SARI SYAFRIZAL TRI NURHARIYATI WIWIN SUWINARTI YULIANSYAH YULIANSYAH