ORCID Profile
0000-0002-0112-0982
Current Organisation
Badan Riset dan Inovasi Nasional Republik Indonesia
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Universitas Gadjah Mada
Date: 31-08-2018
DOI: 10.22146/MOT.34871
Abstract: Faloak (Sterculia quadrifida R.Br) is a medicinal plant used by people in the province of East Nusa Tenggara to treat hepatitis. This study aims to determine the acute toxicity of faloak (Sterculia quadrifida R. Br) bark ethanol extract in Sprague-Dawley (SD) male white rats. The method used is experimental using post-test only control group design. In this study the parameters used are body weight, clinical symptoms, clinical biochemistry (ALT & AST), histopathology of liver organ and mortality in rats. Twenty male Sprague-Dawley rats were randomly assigned to 5 groups, group 1 as control, group 2 was administered orally faloak bark ethanol extract at dose of 40 mg / kg body weight, group 3 at dose of 200 mg / kg body weight, group 4 at dose of 1000 mg / kg body weight and group 5 at dose of 5000 mg / kg body weight. Results of observation for 24 hours there are no dead rats, so the value of LD50 extract ethanol faloak is 5,000 mg / kg body weight. Observations were conducted for 14 days to observed delayed occurrence of toxic effects. Oral administration of the faloak bark ethanol extract reduced the level of AST and ALT. The histopathology observation of rats liver cells showed liver cell necrosis at treatment doses of 200 - 5,000 mg / kg body weight.
Publisher: IOP Publishing
Date: 11-2021
DOI: 10.1088/1755-1315/909/1/012014
Abstract: The increasing need for agricultural land has led to a shift in the cultivation of vegetation on peatland especially food crops. Agricultural activities on peatland require careful planning, appropriate technology application, and proper management due to the marginal and the fragile peatland ecosystem. Research and development are needed to evaluate the carrying capacity of environmental impacts on peatland use. This study aimed to obtain information on the water quality of peat domes, primary canals, and secondary canals of Block C, Pulang Pisau Regency. The study area is now mostly used for agricultural activities. The analysis was carried out in a descriptive qualitative manner based on water parameter testing results to assess the water quality of peat domes, primary canals, and secondary canals of each type of peatland use in Buntoi, Garung, and Kanamit Barat Village. The results indicated that five chemical parameters exceeded the water quality criteria for Class II PP No. 22/2021 namely BOD, COD, free chlorine, zinc, and lead in Buntoi. Further, in Garung, six chemical parameters exceeded the water quality criteria: DO, BOD, COD, free chlorine, lead, and copper. Meanwhile, in Kanamit Barat Village, seven chemical parameters exceeded the criteria: DO, BOD, COD, free chlorine, zinc, lead, and copper. Based on this research, therefore, agricultural activities on this peatland area should consider the natural characteristics of peat water and the selection of suitable plants.
Publisher: Innovare Academic Sciences Pvt Ltd
Date: 15-05-2019
DOI: 10.22159/AJPCR.2019.V12I7.33261
Abstract: Objective: Sterculia quadrifida R. Br. of Sterculiaceae family is locally known as “Faloak” in East Nusa Tenggara Province, Indonesia. S. quadrifida is used in folk medicine to treat hepatitis, rheumatism, and to recover stamina. The aim of this study was to determine the total flavonoids, total phenolic content (TPC), and antioxidant activity of extracts from different plant parts of S. quadrifida. Methods: The s led parts of S. quadrifida were non-stripped stem bark, new regrown stem bark, old regrown stem bark, root bark, branch bark, and leaves. Stem bark was classified into three categories, namely, bark that has never been peeled (non-stripped stem bark), old regrown stem bark (estimated to be months after debarking), and new regrown stem bark (estimated to be months after debarking). Total flavonoid content (TFC) was determined by colorimetric aluminum chloride method and TPC was measured using Folin–Ciocalteu’s reagent. Antioxidant activity was determined with 2,2-diphenyl-1-picrylhydrazyl (DPPH). Results: The concentrations of flavonoids in S. quadrifida extracts from different plant parts varied from 0.58±0.13 to 1.25±0.10 mg QE/g. The TPC in the extracts of different plant parts ranged between 8.61±0.09 and 10.43±0.08 mg GAE/g. Branch bark has the highest total flavonoid and phenolic content. The extract of new regrown stem bark exhibited potent antioxidant activity with inhibitory concentration (IC50) values of 2.51±0.03 μg/ml. Conclusion: This study demonstrated for the first time that extracts from different plant parts of S. quadrifida exhibited strong antioxidant activity. However, the total phenolic and flavonoid contents in S. quadrifida only indicated a weak correlation with its antioxidant activity.
Publisher: Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia
Date: 30-04-2022
DOI: 10.20886/IJFR.2022.9.1.49-62
Abstract: Kancilan Flores (Pachycephala nudigula nudigula) is an iconic bird of Kelimutu National Park. The bird has a unique characteristic with the ability to make a wide variety of song. The local people call this bird 'Garugiwa' and also 'burung arwah' or 'spirit bird' because it is small and hard to spot but has a loud chirp. Some literature mentions this bird with different scientific names. This study aimed to identify this bird to rectify this misnaming scientifically and to observes Kancilan Flores behavior, habitat, and population. Kancilan Flores is an attractive fauna for tourists. Therefore, this study also recommended potential birdwatching locations for Kancilan Flores. This study used a transect line and direct observation methods. The results showed that the estimated population size of Kancilan Flores in the Kelimutu National Park was 1,667 in iduals with a population size range of 1,245–2,089 in iduals. The population density of Kancilan Flores was estimated at 0.53 in iduals per hectare. The Kancilan Flores is most commonly found at an altitude of 1,500–1,600 m a.s.l. Recommended areas as bird watching locations for Kancilan Flores, namely the Edelweiss Garden, Perekonde, the lower Arboretum, and the Kancilan Flores middle Arboretum. Therefore, it is necessary to protect the population of Kancilan Flores by strictly prohibiting hunting and destruction of their habitat.
Publisher: IOP Publishing
Date: 12-2021
DOI: 10.1088/1755-1315/948/1/012021
Abstract: The Rote snake-necked turtle ( Chelodina mccordi Rhodin, 1994) or Kura-kura Leher Ular Rote is an endangered species endemic to Rote Island, East Nusa Tenggara. It is listed as Critically Endangered by the IUCN. However, based on surveys in recent years, C. mccordi was presumed extinct in the wild. Ex-situ conservation is one alternative to conserve C. mccordi . The purpose of this paper is to describe the reproductive biology of the Rote snake-necked turtle in captivity. Three (one male and two female) C. mccordi were observed in Oelsonbai captivity, Kupang, from 2009 to 2020 to obtain data on the species’ reproductive biology. The first mating behaviour was observed when the turtles were six years old. Hatches occurred two or three times a year, with clutch size varied from five to twenty eggs. Egg hatchability was 75-100 percent, with an incubation period of 76 to 102 days. Female size when mature straight-line carapace length (SCL) 178 mm, carapace width 145 mm, and plastron length 142 mm. Male size straight-line carapace length (SCL) 190 mm, carapace width 150 mm, and plastron length 143 mm.
Publisher: IOP Publishing
Date: 11-2020
DOI: 10.1088/1755-1315/591/1/012044
Abstract: The information on the population size and habitat condition of the Saltwater crocodile ( Crocodylus porosus ) in East Nusa Tenggara is unavailable. The present paper discusses preliminary data on population and habitat characteristics of the Saltwater crocodile in three conservation areas in Timor island, namely Teluk Kupang Marine Nature Tourism Park, Menipo Nature Tourism Park, and Maubesi Mangrove Forest Nature Reserve. Spotlight surveys and vegetation analyses were carried out in each location. The crocodile encounter rate was calculated as in iduals detected per km surveyed. The encounter rates in Teluk Kupang, Menipo, and Maubesi were 0.3 crocodiles/km, 0.4 crocodiles/km, and 0.6 crocodiles/km, respectively. Hatchlings, juveniles, and adult saltwater crocodiles were found in Maubesi, and only hatchlings were found in Menipo. Hatchlings were found in paddy fields, and adults were found in mangroves, estuaries, and rivers. Mangrove densities in Teluk Kupang, Menipo, and Maubesi were 127 trees/ha, 124 trees/ha, and 186 trees/ha, respectively. These are the first systematic surveys in the areas studied, and additional work is needed to characterize the population and habitat of the saltwater crocodile in East Nusa Tenggara.
Publisher: Universitas Indonesia, Directorate of Research and Public Service
Date: 30-12-2021
Publisher: Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia
Date: 30-04-2023
DOI: 10.59465/IJFR.2023.10.1.47-60
Abstract: Sterculia quadrifida R.Br. Bark decoction is used to treat hepatitis and consumed as a tonic by Timorese in the East Nusa Tenggara Province, Indonesia. Raw herbal materials are susceptible to fungi contamination, have limitations in transportation, and have low economic value. Processing the bark into powder packed in tea bags is expected to overcome these obstacles. Stevia, ginger, and mint leaves are herbs often added to herbal drink formulas. This study aimed to evaluate the antioxidant capacity, total flavonoid content (TFC), total phenol content (TPC), physicochemical properties, and sensory properties of six formulas, namely: (F1) pure S. quadrifida bark (F2) bark of S. quadrifida and leaves of stevia (F3) stem bark of S. quadrifida and ginger (F4) bark of S. quadrifida, stevia, and ginger (F5) bark of S. quadrifida and mint leaves (F6) bark of S. quadrifida, stevia, and mint. Total phenolic content was measured using the Folin-Ciocalteu method, and total flavonoids were determined using the AICI3 method. Antioxidant activity was measured using the 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) method. The TPC of S. quadrifida tea ranged from 14.09±0.7 to 68.20±0.95% Gallic Acid Equivalent (GAE), and the TFC ranged from 0.03±0.005 to 0.09±0.004% QE. The Ascorbic acid Equivalent Antioxidant Capacity (AEAC) of F1, F2, F5, and F6 were insignificantly different. F1 contained the highest levels of antioxidants (1,044.3±28.48 ppm Ascorbic Acid Equivalent (AAE)). Formulas with the addition of stevia, mint, and ginger showed weaker antioxidant activity than pure S. quadrifida. F1 and F2 have the potential to be developed as commercial herbal teas
Publisher: Universitas Indonesia, Directorate of Research and Public Service
Date: 30-12-2021
Publisher: IOP Publishing
Date: 12-2019
DOI: 10.1088/1755-1315/407/1/012005
Abstract: Changes of socio-economic and land use in the water catchment area are factors that affect the water quality of a lake. This study quantified the impact of socio-economic factors and the dynamics of land covers of Lake Toba water catchment area on the total suspended solid (TSS) parameter, one of the parameters in water quality indicators. Statistical analysis was run by using multiple linear regressions. Parameters observed were TSS, socioeconomic related data and land use in Samosir, Tobasa, Simalungun, Dairi, Humbang Hasundutan and North Tapanuli Regencies in 2008, 2012 and 2016. The results indicated that the water quality of Lake Toba was slightly polluted in 2016 and in 2017. Based on the regression analysis, it was found that some factors significantly affected the concentration of TSS, namely shrubland and dryland farming at 99% confidence level the number of populations, Location Quotient (LQ) for dry land paddy field and soybean production at 95% confidence level and settlement land area, geographic population density, LQ for rice and corn production at 90% confidence level. Managing shrubland through a land rehabilitation program and encouraging a rotational cropping system are recommended strategies to manage the increasing TSS in the Lake Toba.
Publisher: IOP Publishing
Date: 12-2019
DOI: 10.1088/1755-1315/407/1/012008
Abstract: Microplastics are small plastic particles less than five millimeters in size. Microplastic is dangerous because it becomes a medium for other pollutants such as heavy metals and harmful bacteria to attach on. This study aims to determine the presence of microplastic in the digestive tracts of fishes in Jakarta Bay. The number of fish s les obtained was 25 fishes consisting of several species, namely, Siganus sp., Albula forsteri, Lutjanus sp., Parastromateus sp ., Plicofollis argyropleuron, P us argenteus , Paraplotosus albilabris , Sardinella fimbriata , and Platycephalus indicus . The s les were grouped into three categories based on the length of their body, namely small fish with a length of 13-24 cm, medium fish 25-36 cm, and large fish 37-90 cm. The method used to identify microplastics in the fishes digestive tract is optical microscopy. Microplastics were found in 19 fish (76%), those identified as fiber is 73%, identified as films is 18%, and identified as fragment 9%. The larger the size of fish the higher the microplastic content of all types. This implies that microplastic bioaccumulation occurs through the food chain.
Publisher: MDPI AG
Date: 06-02-2023
DOI: 10.3390/F14020321
Abstract: The management of natural resources based on socio-economic and ecology development has led to a focus on the bioeconomy in the policy discourse of non-timber forest products (NTFPs). Honey is an important NTFP with high socio-economic value, and its production involves millions of Indonesians. This article reviews the current status of honey-producing bee management, cultivation and harvesting system, marketing and socio-economic values, and the industry’s environmental function in Indonesia. This research utilized a meta-narrative review method to collect data and information from Google Scholar, Scopus, Science Direct, ResearchGate, Sinta, and Garuda. The study showed that the four bee species, namely Apis mellifera, Apis cerana, Apis dorsata, and stingless bee, are the most common species in honey production in Indonesia. The four species have specific characteristics based on habitat, production capacity, derivative products, management intervention to meet honey product standards, and sustainable livelihoods. The value chain of bees’ major products, such as honey, propolis, pollen, royal jelly, wax, and other derivative products, involves the distribution of honey to all involved communities, including beekeepers, honey gatherers/hunters, intermediate traders, and the processing industry. This study also found a significant association between environmental sustainability statutes that affects functional sustainability and economic function. The finding parallels the global trends that put forward a forest-based bioeconomy approach to forest resource management. The policy must be strengthened in managing relationships among supporting actors for sustainable honey production.
Publisher: National Research and Innovation Agency
Date: 31-07-2019
Abstract: ABSTRACTThe population growth rate in big cities such as Jakarta and its satellite cities has a correlation that is directly proportional to the level of clean water consumption. The biggest consumption of clean water is generally used for domestic household needs. However, the use of clean water is still not efficient. Therefore, the efficiency of water-saving needs to be carried out by utilizing sources that have not been optimally used, for ex le, greywater and rainwater. The purpose of this study is to determine the level of water usage in 3 (three) types of housing and the level of efficiency of utilization of domestic wastewater (greywater) and rainfall (CH) in reducing the use of clean water. This research was performed in the Villa Bintang Mas residential area in the City of South Tangerang, the Villa Bintang Mas residential area in the City of Depok, and the Selakopi Hijau/Forestry residential area in the City of Bogor. Data collection was conducted by a series of surveys using a questionnaire on the s le of a household. The results show that the data processing needs of clean water in three residentials range of values between ± 158.84 Liters erson/day up to ± 215.38 Liters erson/day. The level of efficiency of the utilization of greywater and rainwater in reducing the usage of clean water in three housing ranges from 21.12% to 58.47%.Keywords: Domestic Waste, the Use of Clean Water ABSTRAKTingkat pertumbuhan penduduk di kota-kota besar seperti jakarta dan kota-kota satelitnya memiliki korelasi yang berbanding lurus dengan tingkat konsumsi air bersih yang dimanfaatkan oleh masyarakat. Konsumsi air bersih terbesar adalah untuk kebutuhan domestik rumah tangga. Penggunaan air bersih saat ini masih belum mengikuti kaidah efisiensi dalam penggunaannya, untuk itu efisiensi penghematan air perlu segera dilakukan dengan memanfaatkan sumber-sumber lain yang belum termanfaatkan, antara lain air limbah domestik rumah tangga (grey water) dan air hujan. Tujuan dari penelitian ini adalah mengetahui tingkat pemakaian air di 3 (tiga) tipe perumahan,serta tingkat efisiensi pemanfaatan air limbah domestik rumah tangga (grey water) serta curah hujan (CH) dalam menurunkan pemakaian air bersih. Penelitian ini dilaksanakan di Perumahan Villa Bintang Mas, Kota Tangerang Selatan, Perumahan Permata Depok, Kota Depok, dan Perumahan Selakopi Hijau/Kehutanan, Kota Bogor. Pengambilan data dilakukan dengan cara survei menggunakan kuesioner pada rumah tangga yang menjadi s el. Hasil pengolahan data memperlihatkan bahwa kebutuhan air bersih di tiga perumahan berkisar pada rentang nilai antara ±158,84 Liter/Orang/Hari s ai dengan ± 215.38 Liter/Orang/Hari. Tingkat efisiensi pemanfaatan grey water dan air hujan dalam mengurangi pemakaian air bersih di tiga perumahan berkisar antara 21,12% hingga 58,47%.Kata kunci: Limbah Domestik, Penggunaan Air Bersih
Publisher: Institute of Research and Community Services Diponegoro University (LPPM UNDIP)
Date: 29-05-2019
DOI: 10.14710/JIL.17.1.113-119
Abstract: The increasing frequency of flood events is an indication of the failure of watershed management. Natural resource utilization activities in the Solo watershed tend to be intensive from upstream to downstream, cause a decrease in the carrying capacity of the watershed. To restore the carrying capacity of the watershed, efforts are needed to monitor and evaluate watersheds. The initial stage that needs to be done is to ensure the accuracy of the flood-prone areas by determining priority areas. The purpose of the study is to determine the flood-prone areas in the Solo watershed based on the level of flood vulnerability. Flood vulnerability is influenced by topographic conditions. The Topographic Wetness Index (TWI) method was used to determine the flood-prone areas. The high TWI value indicates that the area has high flood vulnerability and is associated with flat topography with high flow density. This method is based on raster data was derived from DEM 30 m data which is reduced to slope through spatial analysis tools and the accumulation flow is analyzed using Watershed Delineation Tools (WDT). Based on the results of the analysis, the priority of flood handling is determined in the criterion-very vulnerable area with TWI 11.65-38.30 identified as 387098.23 ha (39.68%). Flood handling in the Solo watershed is prioritized on 1) Bojonegoro Regency covering 105215.13 ha, 2) Ngawi (56810.68 ha), 3) Madiun (44102.06 ha), 4) Tuban covering an area of 43072.06 ha, and 5) Ponorogo (35853.62 ha).
Publisher: Research, Development and Innovation Agency, Ministry of Environment and Forestry
Date: 12-2018
Publisher: AIP Publishing
Date: 2021
DOI: 10.1063/5.0053057
Publisher: IOP Publishing
Date: 12-2019
DOI: 10.1088/1755-1315/407/1/012001
Abstract: Disposable plastic bags have already become global environmental problems due to their long durability. Plastic bags can be decomposed into microplastic and become more harmful to the environment. This paper will describe socio-economic factors that determinate plastic bag consumption and willingness to pay (WTP) for compostable shopping bags in Yogyakarta. Respondents were chosen using simple random s ling adopting Slovin formula. At a critical value of 4,82%, the s le size was 450 households. Socio-economic factors affecting the use of plastic bags are tested by employing multiple regressions. The result showed that the average use of plastic bags in Yogyakarta is 8 bags/household/week. Factors that influence the usage of plastic bags were the intensity of shopping in the supermarkets/grocery/convenience store, monthly shopping expenditure, and the intensity of the use of non-degradable plastic bags. WTP for compostable shopping bags is IDR 615 per bag. Since the traditional market was the first choice of respondents for daily or weekly shopping, plastic bag levy policy that applied in supermarkets has a limited impact on reducing plastic bag usage.
Publisher: MDPI AG
Date: 10-12-2021
DOI: 10.3390/F12121743
Abstract: Non-Timber Forest Products (NTFPs) management can lead to various benefits for community livelihood and forest sustainability. However, such management has not been carried out optimally and sustainably in Indonesia, due to various limiting factors including ineffective policies, undeveloped cultivation technologies, and inadequate innovation in processing technologies. Further, the ersity of NTFPs species requires that policy-makers determine the priority species to be developed. Agarwood (Aquilaria spp. and Gyrinops spp.), benzoin (Styrax spp.), sandalwood (Santalum album L.), and cajuput (Melaleuca cajuputi Powell) are aromatic NTFPs species in Indonesia that forest-dwellers have utilized across generations. This paper reviews the current governance, cultivation systems, processing and valuation, and benefits and uses of these species. We also highlights the future challenges and prospects of these NTFPs species, which are expected to be useful in designing NTFPs governance, in order to maximize the associated benefits for the farmers and all related stakeholders.
Publisher: Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia
Date: 30-04-2023
DOI: 10.59465/IJFR.2023.10.1.61-74
Abstract: Cratoxylum formosum (Jack) Benth. & Hook.f. ex Dyer is one of the plant species that have the potential to be developed into an antibacterial and antioxidant essential oil product. This study was conducted to determine the value of organoleptic tests and the consumers' willingness to pay (WTP) for the three variants of Cratoxylum formosum essential oil products. For the parameters of colour, hedonic test values and score tests showed good results panellists did not mind the pure and mixed Cratoxylum formosum essential oil colours. However, for fragrance parameters, the hedonic test showed a dislike score. Most panellists disliked the strong "scent of leaves" of pure C. formosum oil. The score test showed satisfactory values, the panellists accept the fragrance of Cratoxylum formosum essential oil, but it is necessary to add a more preferred scent mixture to reduce the strong original fragrance of the oil. The cost of production of Cratoxylum essential oil is Rp.7,259.23 (USD 0.48)/mL or Rp.72,592.30 (USD 4.84) for every 10 mL. Based on the cost ofproduction, the appropriate selling value for every 10 mL of Cratoxylum essential oil is a minimum of USD 4.84.
Location: Indonesia
Location: Indonesia
Location: Indonesia
No related grants have been discovered for Grace Serepina Saragih.