bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water infiltration rate of illegal mining sites in Bukit Soeharto Forest Park, East Kalimantan Province
Authors: Rafi M , Aipassa M I , Sarminah S , Hardwinarto S , Kristiningrum R , Soenarto  , Kristina F , Ruslim Y , Siahaya ME 
Published: December 2023

Abstract
Infiltration is a component of the hydrological cycle which functions as a source of groundwater, minimizing flooding and distributing water evenly throughout the rainy and dry seasons. This study aims to determine the rate of water infiltration or infiltration and permeability values in 2 (two) land conditions for ex-illegal mining sites, namely at KM 68 and KM 48, and the location of undisturbed land in KM 54 secondary forest area of the Bukit Soeharto Forest Park (BSFP). The research method used a double ring infiltrometer, then tested at the Kalimantan Bioresources Laboratory. Infiltration rate shows that secondary forest area of the KM 54 location was 275.2 mm/hour which was included in the very fast class, while in the former mining sites KM 68 and KM 48 respectively it was 244.6 mm/hour, and 145.7 mm/hour which is included in the fast class. Laboratory analysis shows that the soil permeability value in the secondary forest area of KM 54 location was 6.41 cm/hour which was included in the rather fast class, while the permeability value in the ex-mining land area of KM 68 and KM 48 respectively was 6. 26 cm/hour and 3.66 cm/hour which are included in the medium class. This is due to the physical soil properties such as soil texture, soil structure, bulk density, and soil porosity which are the factors that cause differences in infiltration rates in several land conditions.
Alternatives of plant species for forest and land rehabilitation and their potential carbon dioxide absorption in the Wain Watershed, East Kalimantan, Indonesia
Authors: Afdaliyah G S , Hardwinarto S , Karyati  
Published: December 2023

Abstract
This research was conducted in the Wain Watershed in East Kalimantan, Indonesia. The area of the Wain Watershed is around 11,225.68 ha, which includes the Sungai Wain Protection Forest area of 10,025 ha. The objective of this research was to obtain some alternatives of plant species for Forest & Land Rehabilitation and they have the potential to absorb carbon dioxide (CO2) based on the conditions of land cover types, land systems, and land criticality in the Wain watershed. The results of this research indicated that the types of land cover in the non-critical land category were primary dryland forest, secondary dryland forest, and primary mangrove forest; while the potentially critical land cover categories were secondary dryland forest, secondary mangrove forest, mixed dryland agriculture, dryland agriculture, and settlements; slightly-critical land categories, namely shrubs, mixed dryland agriculture, and open land; critical land category was open land. The alternatives of recommended plant species suitable for Forest and Land Rehabilitation, which have the potential to absorb carbon dioxide in the Wain watershed include groups of endemic plant species, multi-purpose tree species, and fast growing species.
Potential utilization of Indonesian plant extracts for biothermicide to control subterranean termite attack (Coptotermes spp.): a review article
Authors: Rizqullah M A , Erwin  , Budiarso E , Harmonis  , Guswenrivo I , Kuspradini H 
Published: December 2023

Abstract
The control of subterranean termite Coptotermes spp. infestation of low-durability wood species still depends on synthetic chemicals and has a negative impact because it is difficult to degrade into the environmental. Mega-biodiversity of Indonesia’s tropical rainforests presents a rich variety of plants with potential utilization, especially plant extracts that have anti-termite properties. The application of plant extracts with potential anti-termite bioactivity can be a more environmentally friendly alternative for natural wood preservation. This research uses the literature review method. The data obtained came from a search of national journal studies published on Google Scholar in the last 10 years. The results showed that the plant extracts used from the preservative formulation at the optimum concentration can produce the largest percentage of mortality and the smallest weight loss. Preserving wood with plant extracts from low durability class wood species used as test wood such as sengon, rubber, bayur, and durian can increase the classification of wood resistance becoming to grade I-II, indicate resistant and strongly resistant for subterranean termite attack. The three major secondary metabolite compounds from extracts plant used as wood preservatives are alkaloids, flavonoids and terpenoids. These components have the potential to provide toxic properties to wood destroying organisms.
Assessing the phenolic content and antimicrobial properties of Cinnamomum porrectum, Dioscorea bulbifera, and Tristaniopsis whiteana extracts for anticaries agent
Authors: Kuspradini H , Putri A S , Larasati A G , Zulfa N A , Rosamah E , Egra S 
Published: December 2023

Abstract
In this study, we have assessed the phenolic content and antimicrobial properties of three plants (Cinnamomum porrectum, Dioscorea bulbifera, and Tristaniopsis whiteana) against S. mutans and S. sobrinus, bacteria known to contribute to dental caries. The study focused on investigating the antimicrobial properties using the nutrient broth dilution method. Phytochemical screeing was performed using quantitative analysis, which revealed the total polyphenol and total tannin content in the studied plants. The results of the antimicrobial activity test prove that extracts from T. whiteana exhibibited strong inhibition activity against S. sobrinus and S. mutans. The inhibition rates were measured at 76.3% and 72.18%, repectively. These findings suggest that extracts from T. whiteana have the potential to be effective antimicrobial agent against these bacteria. Based on these results, the study concluded that the tested plant extracts have proven antimicrobial efficacy, supporting their potential use as natural antimicrobial. The study highlighted T. whiteana as the promising candidate among tree plants in this study, by demonstrating strong potential as an anticaries agent against microorganisms responsible for dental caries. Furthermore, research and exploration of these plant extracts may supply valuable insight into their mechanisms of action and their potential application in the field of medicine.
Antibacterial and Antioxidant activity of Leaf and Fruit from Jatropha curcas
Authors: Egra S , Syaputra M R , Rosamah E , Kuspradini H , Putri A S , Yamauchi K 
Published: December 2023

AbstractJatropha curcasis often used as a medicinal plant by traditional ethnic to treat skin and dental diseases. This study aims to reveal the antibacterial and antioxidant activities of leaves and fruit. The antibacterial activity was determined using the agar well method withStreptococcus sobrinusand the antioxidant activity of DPPH free radical scavengers. Inhibition of bacteriaS. sobrinusdid not appear to be significant with concentrations of 10, 20, 40 µg/ml, on the other hand antioxidant activity with the highest inhibition was found in methanol leaves with a value of 53.5% and 51.9% methanol in fruit with concentration 100 ppm. IC50 value on the leaves and fruit ofJ. curcaswith a value of 50%.J. curcasleaf and fruit have good activity in transferring protons in DPPH activity. There needs to be further research in isolate the compounds that play a role in balancing these free radicals.
Phytochemical and Bioactivity of Propolis Extracts Produced by Stingless Bee Heterotrigona itama from Two Cultivation Locations
Authors: Rusman R , Arung E T 
Published: December 2023

AbstractPropolis produced by the stingless bee is one of the non-timber forest products that currently has great potential to be developed. This research aimed to analyze the phytochemical present in propolis and to investigate the bioactivities ofHeterotrigona itamapropolis. Propolis samples were collected from cultivation locations in the Faculty of Forestry at Mulawarman University and cultivation locations at Mangkurawang Sub District at Kutai Kartanegara. Propolis was extracted with ethanol and methanol for a mixture of propolis and olive oil. Phytochemical analysis was carried out qualitatively and quantitatively. Antioxidant activity was performed using the radical scavenging assay against DPPH. The antimicrobial activity was determined using the agar-well diffusion method. The preliminary phytochemical analysis showed the presence of alkaloids, flavonoids, tannins, carbohydrates, and coumarins. The results showed that the highest antioxidant activity was found in propolis ethanol extract from Mangkurawang with an IC50value of 112.53 μg/ml, followed by ethanol extract from Fahutan with an IC50of 165.382 μg/ml. Furthermore, the ethanol extract from Mangkurawang showed antimicrobial activity againstStaphylococcus epidermidis, Cutibacterium acnes, andCandida albicans. This present study displayed the potential uses of propolis as an antioxidant and antimicrobial agent.
Potential Biological Activities of Honey from Heterotrigona itama and Its Phytochemicals
Authors: Reskiani S , Rahmawati N R , Arung E T 
Published: December 2023

AbstractStingless bee honey is a nutritional source that is more popular presently as a substitute for forest honey, which is now limited to its natural sources. This study evaluates the potential biological activities and phytochemical contents ofHeterotrigona itamahoney obtained from 2 harvesting periods. The agar-well diffusion method was used for measuring the antibacterial activity, while DPPH free radical scavenging activity was used to measure the antioxidant activity. The phytochemical content of honey is analyzed based on the total phenolic and flavonoid contents. The results revealed that the honey collected during harvesting period 1 contained a total of 65.115 mg GAE/g honey and 136.03 mg CE/mg honey, while in period 2, it yielded 53.94 mg GAE/g honey and 181.08 mg honey, respectively. The results showed that honey samples at two harvesting periods had low free radical scavenging ability. Antibacterial assay againstPropionibacterium acnesindicated that the honey obtained from 2 harvesting periods possessed good antibacterial potential.
Production of bioelectricity from palm oil mill effluent through a dual chamber-microbial fuel cell system with the addition of Lactobacillus bulgaricus
Authors: Febriawan SD , Febriana AP , Yuniarto A , Purwanto M 
Published: December 2023

Abstract
Palm oil liquid waste has been successfully developed to produce bio-electricity with a dual chamber-microbial fuel cell system. This study utilized the Lactobacillus bulgaricus bacteria as a support for the substrate samples prepared in the anode chamber. Meanwhile, in the cathode chamber, KMnO4 electrolyte solution is used as an electroactive species that can capture electrons well. In addition, salt bridges fabricated from agar have a role as ion-exchange media in microbial fuel cells. The test results showed that the best performance was obtained in samples of palm oil wastewater with the addition of 10% Lactobacillus bulgaricus (LS/B-10) bacteria with current, voltage, and power density values of 0.9640 mA, 0.6760 V, and 248.04 mW/m2, respectively. The MFC system has also been proven to be able to reduce COD (Chemical Oxygen Demand) and TSS (Total Suspended Solid) levels, with the results of a reduction percentage of 42.6% and 7.2%, respectively, in the LS/B-10 variable treatment. All test results show that palm oil wastewater with the addition of Lactobacillus bulgaricus bacteria is promising for producing bioelectricity with a microbial fuel cell system.
The effectiveness of alkaline and thermo hydrolysis pretreatments in the bioethanol production from Calliandra calothyrsus wood
Authors: Nasriati N , Ufa M , Ningrum A F , Haqiqi M T , Suwinarti W , Amirta R 
Published: December 2023

Abstract
The demand in energy is increasing along with the development of technology. However, the utilization of fossil energy as the main current energy sources creates various environmental problems. Hence, it is important to search other energy sources which are environmentally friendly. One of the renewable energy sources is bioethanol produced from woody biomass. The purpose of this study was to investigate the suitability of Calliandra calothyrsus wood under development of alkaline and thermohydrolisis pretreatments. These pretreatments included the variations of 15, 30, 45 and 60 min at 121°C with NaOH concentration of 1, 2, and 3% (w/v). The chemical component analysis was conducted by using the TAPPI method, while the percentage of reducing sugar after saccharification was carried out by the Nelson-Somogy method. The results showed that the highest holocellulose content 60,62%, and the highest α-cellulose content was 64,30%. The highest pulp saccharification test results were obtained from 60 min pretreatment of 3% concentration of NaOH, which was 42,82% and 32,99% wood basis. The highest yield of ethanol potential was obtained from 36 hours saccharification, which was 139 L/Ton. Finally, it is suggested to do additional treatments with variations in concentration and temperature in order to obtain more optimal results.
Quality of Charcoal Briquettes from Sawdust Waste of Ulin (Eusideroxylon zwageri) and Coconut Shell (Cocos nucifera) Based on Variations in Ratio and Particle Size
Authors: Handayani S A , Widiati K Y , Putri F 
Published: December 2023

Abstract
The industrial revolution and the improvement in living standards of developing countries have caused serious environmental problems. Energy consumption has been steadily increasing over the years due to the increasing world population. Alternative energy is energy that does not come from fossil fuels. Charcoal briquettes are an alternative fuel made mostly from biomass. Charcoal briquettes, a mixture of sawdust waste of ulin and coconut shells, are alternative energy substitutes for fossil fuels. This study aims to determine the benefits of ulin and coconut shell as renewable energy such as charcoal briquettes, as well as determine the effect of variations in the ratio and particle size of ulin charcoal and coconut shell charcoal on the quality of charcoal briquettes. The research method uses a Factorial Experiment Design with 3 repetitions for testing moisture content, volatile substance levels, ash content, and fixed carbon levels. As for testing the calorific value, 2 repetitions were carried out. The results showed charcoal briquettes with optimal results were found in A1B5 treatment (particle size 40 mesh with a ratio of 100% coconut shell particle) with a moisture content value of 5.27%, ash content of 1.37%, and a calorific value of 6998.19 cal/g. The content, ash content, and calorific value produced from the briquettes have met SNI No. 01-6235-2000 standards.
The Impact of Land Cover Density on the Water Infiltration Process in the Nyadeng Lake Area, Merabu Village Berau District, East Kalimantan
Authors: Marjenah  , Matius P , Aprillius D , Mulyadi R 
Published: December 2023

Abstract
The sustainability of water resources depends on the state of the nearby forest. Land cover is essential for sustaining life systems in a region; the higher the quality of the land cover or forest vegetation, the greater the biodiversity value of the region. This research attempts to determine whether or not the vegetation in the Merabu Village area of Nyadeng Lake has the capacity to process the infiltration rate. The vegetation was sampled using simple random sampling, and a 20 m x 20 m plot was used to represent the area under investigation. Data collection was accomplished by establishing research plots that can represent the entire area or research area, with the size of the plot varying according to plant class. This research utilized a total of six plots. Three plots on the west and three on the east were laid out at a distance of five meters from the lake’s shore. The infiltration rate was measured by creating 0.5 m x 0.5 m infiltration subplots with five replicates per sample plot. These locations have been established approximately five metres away from the shore of the lake. High vegetation cover has a tremendously positive effect on infiltration. The coefficient of determination, with a value of 72%, indicates that the infiltration ability is influenced by the existence of vegetation to a significant degree.
Ameliorant application promotes growth performances of Calliandra calothyrsus Meissn. planted on post-coal mining land
Authors: Junaidi M , Syahrinudin  , Kiswanto  , Sudarmadji T , Ruchaemi A , Hartati W 
Published: December 2023

AbstractGrowth performances of plants raised on post-coal mining lands are highly hampered by the unfavourable environment conditions of plant root zones. This study was carried out to find out if the improvement of plan root environment conditions by the application of ameliorants may boost the growth performance (diameter and height) ofCalliandra calothyrsusduring 6 months after plantation. Twenty-seven replicates of 3 levels of ameliorant treatments (0%v + 0%v, 10%v + 20%v, and 20%v + 10%v of solid decanter + biochar for the M1, M2, and M3, respectively) were applied in compatible arrangement with completely randomized design (CRD) procedure. In each replication, 30 seedlings were planted at 1 m x 2 m spacing. Plant diameter and height were census, a normal distribution test was employed prior to the anova test and mean different was defined by the LSD test. Results showed that diameter growths were significantly affected by the treatment applied. M1, M2, and M3treatments gave a 1.32 cm, 1.29 cm, and 1.69 cm diameter growth, respectively; and gave a 147.4 cm, 142.6 cm, and 161,9 cm height growth, respectively. We conclude that M3treatment is a promising ameliorant application to develop further in raisingC. calothyrsuson post-coal mining lands.
Enriched biochar enhances height growth performance of Anthocephalus cadamba on severely degraded Spodosols in East Kalimantan
Authors: Putra MOPS , Syahrinudin  , Hartati W , Kiswanto  , Sudarmadji T , Sofyan FPM , Hapsari MT 
Published: December 2023

AbstractTropical Spodosols are highly fragile and disturbed Spodosols remain unproductive at conventional management practices due to the inherent infertility of the soils. These soils developed from quartz rocks and are characterized by the presence of E albic and B spodic horizons. This study was conducted to determine the effect of enriched biochar application on height growth of jabon (Anthocephalus cadamba) stands planted on spodosols. Research plots were arranged to comply with a 2-factors completely randomized design (CRD) procedure – 3 levels of rate of biochar treatment (A1= 0%v, A2= 2%v and A3= 5%v) and 2 levels of liquid organic fertilizer enrichment (B0= without enrichment and B1= with enrichment). There were 3 replicates for each treatment consisted of 28 Jabon (Anthocephalus cadamba) plants at 2.5 m x 3 m spacing, therefore a total of 504 plants were observed in this study. Results showed that the rate of biochar and nutrient enrichment gave a significant effect on the height growth of jabon plants (A. cadamba), the best height growth was obtained at the enriched biochar treatment rate of 5%v (A3B1).
Silvicultural decisions to formulate forest restoration strategies using geospatial approaches
Authors: Kiswanto  , Mardiany  , Ariyanto  , Tsuyuki S 
Published: December 2023

Abstract
Restoring deforested and degraded forests is mandatory to guarantee the future of tropical forests. In this study, we formulated silvicultural strategies for restoring tropical forest ecosystems using geospatial approaches to detect deforested and degraded forests based on landscape circumstances. Depending on the overlaid map of the current land cover and its land status, we categorized our forest restoration activity map into three main groups: reforestation, forest rehabilitation, and none. Based on the forest vulnerability, as evidenced by slope and erosion risk, we also allocated the ranks of restoration location into three priorities: first, second, and third. We believe that geospatial modeling maps can assist decision-makers in selecting locations and the most important goals for reforestation in order to reduce greenhouse gas (GHG) emissions in land-based sectors. In order to exactly convey the geospatial data of forest at more detailed landscape scales, such as sub-district and village levels, as well as forest management units, these study need to be enhanced using high-resolution satellite or aerial imageries.
Good practices of post mining land rehabilitation works in the southern region of East Kalimantan, Indonesia
Authors: Sudarmadji T , Hartati W 
Published: December 2023

AbstractOpen-pit/cut/cast mining is a method of extracting coal directly from the surface using a series of level benches to reach the deposit close to the surface overlain by relatively thin vegetation, topsoil, and rocks. During the year of 2010 - 2017 PT Kideco Jaya Agung (KJA) has rehabilitated post mining land 1.379,54 ha in area. The objective of this study was to examine practices of degraded land rehabilitation works and understand good practices of post mining land rehabilitation at minedout forest lands. A number of 750 plots (25mx40m) were established in 2022 to evaluate practices of land arrangement, soil erosion and sedimentation control, and land revegetation works. Rehabilitation activities that have been going well based on established plan were: waste dump arrangement, topsoil spreading, cover crops planting, plant growth rate, number of plant per-Ha, and plant health. However, rehabilitation works that still require improvement were slope stabilization, number and benefits of soil and water conservation infrastructures, excessive soil eronsion, and the composition of long life and fast growing plant species. The evaluation score of post mining rehabilitation works was 22,5 for land arrangement, 17,5 for soil erosion and sedimentation control, and 48 for land revegetation respectively with the total score 87,5. The total score indicates that forest rehabilitation works has been carried out properly based on good practices of coal mining principles.
Soil organic carbon stores in the mangrove forest restoration of ex-ponds in the Salo Palai Village of Kutai Kartanegara
Authors: Jansi B T , Kiswanto  , Mardiany  , Diana R 
Published: December 2023

Abstract
Mangrove forests in the Mahakam Delta have traditionally been used by people for a variety of purposes, including fuel, hut construction, and charcoal production. Such use is still acceptable as long as it does not reach commercial scale. Where mangrove forests have greater potential for carbon absorption when compared to dry land. In this study, several analyses of bulk density, soil carbon (%), total soil organic carbon (g/cm2), total soil organic carbon (tonnes/ha) were analysed from 3 points with 3 depths (0-50.50-100.100- 150). Then an analysis was carried out using the t test to test whether there was a very significant difference or not. The results of this study showed that ponds without rehabilitation had a total bulk density value of 7.16 g/cm2 with a total soil organic carbon store of 0.34 tons/ha. In the former ponds the rehabilitation area has a total bulk density value of 8.64 g/cm2 with a total soil organic carbon store of 1.01 tons/ha. Based on the results of the t test analysis, it shows that t count > t (0.01) so that it can be said that rehabilitated former ponds provide a very significant difference to carbon storage.