BERKALA SAINSTEK最新文献_第6页

The Assessment of Climate Change Impact on Meteorological Draught Susceptability on Sampean Watershed 气候变化对Sampean流域气象干旱易感度的影响评价

BERKALA SAINSTEK Pub Date : 2021-12-06 DOI: 10.19184/bst.v9i4.25065

Masita Ratih, G. Halik, R. U. A. Wiyono

{"title":"The Assessment of Climate Change Impact on Meteorological Draught Susceptability on Sampean Watershed","authors":"Masita Ratih, G. Halik, R. U. A. Wiyono","doi":"10.19184/bst.v9i4.25065","DOIUrl":"https://doi.org/10.19184/bst.v9i4.25065","url":null,"abstract":"Drought disasters that occur in the Sampean watershed from time to time have increased, both the intensity of events and the area affected by drought. The general objective of this research is to develop an assessment method for the impact of climate chan ge on vulnerability to drought disasters based on atmospheric circulation data. The specific objectives of this study are to model rainfall predictions based on atmospheric circulation data, predict rainfall in various climate change scenarios (Intergovernm ental Panel on Climate Change, IPCC – AR5), and assess vulnerability to drought disasters using a meteorological approach. The Standardized Precipitation Index (SPI) is one way to analyze the drought index in an area which was developed previous researcher. The Standardized Precipitation Index (SPI) is designed to quantitatively determine the rainfall deficit with various time scales. The advantage of the Standardized Precipitation Index (SPI) is that it is enough to use monthly rainfall data to compare drou ght levels between regions even with different climate types. To facilitate the presentation of the data base on the identification of d rought susceptibility, we need a system that can assist in building, storing, managing and displaying geographically ref erenced information in the form of spatial mapping. This research facilitates monitoring of the area of drought-prone areas, predicts drought levels, prevents future drought disasters, and prepares plans for rebuilding drought-prone areas in the Sampean watershed.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115291629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decomposition Rate of Avicennia lanata in Bakau Kecil Mangrove Forest Area, Mempawah District 孟帕瓦区Bakau Kecil红树林地区白杨的分解速率

BERKALA SAINSTEK Pub Date : 2021-12-06 DOI: 10.19184/bst.v9i4.27198

Asri Mulya Ashari, W. Warsidah

引用次数: 0

TiO2-rGO Composite for Photocatalytic Decolorization of Methylene Blue Under the Visible Light Illumination 可见光下TiO2-rGO复合材料对亚甲基蓝的光催化脱色研究

BERKALA SAINSTEK Pub Date : 2021-12-06 DOI: 10.19184/bst.v9i4.27602

Ulfa Farizka Hidayati, A. B. Aritonang, L. Destiarti

{"title":"TiO2-rGO Composite for Photocatalytic Decolorization of Methylene Blue Under the Visible Light Illumination","authors":"Ulfa Farizka Hidayati, A. B. Aritonang, L. Destiarti","doi":"10.19184/bst.v9i4.27602","DOIUrl":"https://doi.org/10.19184/bst.v9i4.27602","url":null,"abstract":"Titanium dioxide-reduced graphene oxide (TiO2-rGO) was synthesized by hydrothermal method using TiO2 powder and rGO precursor from graphite rod by modified Marcano Method. The obtained TiO2-rGO photocatalyst was characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), and Diffuse reflectance UV (DRUV). Based on XRD diffractogram, it is known that TiO2 has an anatase crystal phase. In the FTIR spectrum, it was observed that there was an absorption peak at the wavenumber of 1630 cm-1 from the vibration (C=C) as an indication that the C atom was incorporated into the TiO2 structure. The incorporation of C atoms into the TiO2 structure to form TiO2-rGO causes the bandgap energy to decrease from 3.29 eV to 3.20 eV. The photocatalytic activity was tested against decolorization of methylene blue solution for 180 minutes under visible light illumination from a 50 watt LED lamp. Every 10 minutes, absorbance was measured using a UV-Vis spectrophotometer at a wavelength of 664 nm. TiO2-rGO photocatalyst has better photocatalytic activity with %D of 96.39% under UV light and 84.32% under visible light illumination, while TiO2 is only able to degrade 93.87% and 36.55%, respectively.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122070118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis The Effect of Coconut Shell Charcoal Mixed Doses and Adhesive In Characteristics Jamu Dregs Briquettes 椰壳炭混合剂量及黏合剂对蚕木渣成型性能的影响分析

BERKALA SAINSTEK Pub Date : 2021-12-06 DOI: 10.19184/bst.v9i4.27326

Arinda Dwi Arafah, S. Harsono

{"title":"Analysis The Effect of Coconut Shell Charcoal Mixed Doses and Adhesive In Characteristics Jamu Dregs Briquettes","authors":"Arinda Dwi Arafah, S. Harsono","doi":"10.19184/bst.v9i4.27326","DOIUrl":"https://doi.org/10.19184/bst.v9i4.27326","url":null,"abstract":"Briquette is an alternative simple fuel that has a relatively high calorific value, so it has the potential to reduce the use of firewood and fuel oil (BBM). Herbal waste is one of the biomass materials that came from the rest of the material in the production of herbal medicine made from medicinal plants. Utilization of herbal dregs as briquettes has been implemented by PT. Industri Jamu dan Farmasi Sido Muncul. Tbk, as fuel for boiler engines. Making briquettes from biomass requires the addition of materials, one of which is coconut shell charcoal and adhesives such as molasses and tapioca flour to improve the physical properties of the briquettes. Briquettes with good quality have a maximum moisture content and ash content of 8%, a heating value of more than 5000 cal/gram, a constant combustion temperature of 350℃ for a long period of time and is easily flammable. The purpose of this study was to determine the characteristics of briquettes based on the value of water content, ash content, combustion temperature, combustion rate, and calorific value. Variable treatment with the addition of coconut shell charcoal with several doses of 10%, 20%, and 30% and variations of adhesive materials. Data analysis was performed by using two-factor ANOVA statistical test. The results showed that briquettes with tapioca flour adhesive and 30% coconut shell charcoal composition had the best characteristics of briquettes compared to other variations.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124451589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Inventory of Butterfly (Lepidoptera: Rhopalocera) at Agrotechno Park The University of Jember 浙江大学农业科技园蝴蝶(鳞翅目:蛱蝶亚目)调查

BERKALA SAINSTEK Pub Date : 2021-11-27 DOI: 10.19184/bst.v10i1.20349

P. Purwatiningsih, Widyantari Anggreini, R. Setiawan

{"title":"Inventory of Butterfly (Lepidoptera: Rhopalocera) at Agrotechno Park The University of Jember","authors":"P. Purwatiningsih, Widyantari Anggreini, R. Setiawan","doi":"10.19184/bst.v10i1.20349","DOIUrl":"https://doi.org/10.19184/bst.v10i1.20349","url":null,"abstract":"The exploration of the butterfly on The University of Jember has been conducted. The objective of this study is to explore the diversity of butterfly on UPT Agrotechno Park The University of Jember. The research has been done during August to September 2020. Sampling was carried out by scanning methods in the fields with sweeping net. The results revealed the existence of 18 genus with four belonging to the families Papilionidae, Pieridae, Nymphalidae, and Lycaenidae. Moreover 24 species had been identified namely Papilio sp. 1, Papilio sp. 2, Troides sp., Graphium sp., Appias sp., Catopsilia sp., Delias sp. 1, Delias sp. 2, Eurema sp.1, Eurema sp. 2, Leptosia sp., Euthalia sp. 1, Euthlia sp. 2, Dophla sp., Elymnias sp., Euploea sp. 1, Euploea sp. 2, Hypolimnas sp., Junonia sp. 1, Junonia sp 2, Discophora sp., Acraea sp., Zizina sp. dan Lampides sp. Butterflies use plants as host plants and food plants. High host plant diversity is directly proportional to the diversity of butterfly species. The UPT Agrotechnopark Universitas Jember has 1 hectare of land in which there are collections of fruit, vegetable, ornamental, medicinal and food plants. The high diversity of host and forage plants in the UPT Agrotechnopark is a good habitat for butterflies. However, identification to the species taxa are further needed.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116433502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Evaluation of Mechanical Properties of Concrete Due to The Use of Glass Waste as Partial Substitution of Fine Aggregate 玻璃废料部分替代细骨料对混凝土力学性能的影响

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.26628

Ga Hayu, K. Dewi, A. G., Rivald Akbar

{"title":"The Evaluation of Mechanical Properties of Concrete Due to The Use of Glass Waste as Partial Substitution of Fine Aggregate","authors":"Ga Hayu, K. Dewi, A. G., Rivald Akbar","doi":"10.19184/bst.v9i3.26628","DOIUrl":"https://doi.org/10.19184/bst.v9i3.26628","url":null,"abstract":"Increasing human awareness of the importance of protecting the environment and conserving natural resources requires concrete innovation as an environmentally friendly and sustainable material. Accumulated of solid waste begins to be processed and reused, one of which is as a constituent of concrete. Among the various types of solid waste, glass waste is considered as an alternative that can be used as a substitute for fine aggregate (sand), coarse aggregate (split stone) and cement. This study investigated the use of mix coloured glass waste consisting of clear, green, and brown as partial substitution of sand in concrete. Although the glass colors were mixed, the proportion of each color had been determined in this study, namely 25%, 25%, and 50%. The purpose of determining these proportions is to find out which type of color glass has the most effect on concrete mix. The target characteristic strength of 25 MPa was produced by replacing sand with 20% of mix coloured waste glass. Three combinations of concrete mixes were prepared for this study. Compression tests were conducted at 7, 14, and 28 days. Workability of fresh concrete, density, compressive strength, and failure mode were investigated in this study. Results showed that the use of waste glass was able to increase the workability of fresh concrete. K1, K 2, and K3 obtained slump values which were 4%, 6,7%, and 1,3% higher than normal concrete. Normal concrete and all combinations exhibited similar density values. Only normal concrete achieved the characteristic strength of 25,7 MPa at 28 days. Meanwhile K1, K2, and K3 achieved strengths of 22,4 MPa, 22,1 MPa, and 24,7 MPa, respectively. It was evident that as workability values increased, the compressive strengths were noticed to reduce.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116790262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Total Phenol and Antioxidant Activity of Ethanol Extract and Water Extract from Claw Uncariaa gambir Roxb 钩藤醇提物和水提物的总酚含量及抗氧化活性

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.27179

Lucky Hartanti, Asri Mulya Ashari, W. Warsidah

{"title":"Total Phenol and Antioxidant Activity of Ethanol Extract and Water Extract from Claw Uncariaa gambir Roxb","authors":"Lucky Hartanti, Asri Mulya Ashari, W. Warsidah","doi":"10.19184/bst.v9i3.27179","DOIUrl":"https://doi.org/10.19184/bst.v9i3.27179","url":null,"abstract":"Uncaria gambier Roxb is a plant from the Rubiaceae family, belongs to the Bajakah group and has been used empirically in the treatment of various types of diseases in the community. Besides being one of the industrial plants and export commodities produced in Sumatra and Kalimantan, gambier leaves is also used frequently in Indonesia, both for the pharmaceutical and cosmetic industries. As a result, market demand both nationally and internationally have increased. The aim of this research are determination of antioxidant activity of ethanol extract and aqueous extract of gambir claw using 1,1-diphenil-2-picrylhydrazyl (DPPH) and determination of total phenol using Calcetau folin reagent. Gambier plant samples were taken in the forest area around the Tanjungpura University campus, the claws were separated and dried at room temperature, then powdered and extracted by maceration using 70% ethanol pa and aquadest, then the extract was concentrated until it was ready to be tested for antioxidant activity and determination of total phenol. The total phenolic ethanol extract and aqueous extract of gambir claw were 224.66 mg GAE/g extract (GEA : Gallic Acid Eqivalent) and 299.08 mg GAE/g extract, respectively, while the antioxidant potential (IC50) was 39.566 μg/mL and 65.140 μg/mL, and the IC50 for comparison of Vitamin C was 7.02 μg/mL.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129682806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of NTF-3 (Neurotrophic Factor 3) Gene Information in Columbidae by In Silico 利用计算机研究耧菜科植物NTF-3(神经营养因子3)基因信息

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.24163

S. Suprianto, I. Budiarsa, F. Dhafir, Ni Kadek Dewi Permatasari, Gusti Ayu Kadek Yunita Safitri

{"title":"Study of NTF-3 (Neurotrophic Factor 3) Gene Information in Columbidae by In Silico","authors":"S. Suprianto, I. Budiarsa, F. Dhafir, Ni Kadek Dewi Permatasari, Gusti Ayu Kadek Yunita Safitri","doi":"10.19184/bst.v9i3.24163","DOIUrl":"https://doi.org/10.19184/bst.v9i3.24163","url":null,"abstract":"Neurotrophin Factor 3 (NTF3) is one of the genes that plays an important role in the regulation of the neural systems of vertebrate animals, this gene has a special function in explaining the survival factors of some vertebrate animals. Based on the information obtained from GenBank, the nucleotide sequence of the NTF-3 gene in several vertebrate animals has been known and some of the data obtained have not been studied further for research purposes in adding information related to the molecular character of the NTF-3 gene, such as the NTF-3 gene in Columbidae. Columbidae is a group of birds that have quite diverse species variations, the number of species in columbidae will be very helpful in obtaining data on comparisons of the genetic character of the NTF3 gene. The purpose of this study was to analyze and describe the information on the NTF-3 gene (Neurotrophic Factor 3) in Columbidae through the in silico approach with computational methods. The NTF3 gene nucleotide sequences in Columbidae showed a fairly high level of similarity to the base sequences. This illustrates the fairly close proximity between each species. Geotrygon Montana is a species of Columbidae which has variations of the Base sequence which is quite different from other species. Evaluation of the model structure shows good stability of each target protein, all evaluation results describe a good structure, meaning that the conformation of each target sequence is in accordance with the sequence, so that the structure that is built has high accuracy with the actual model. The results of this research study can be a special description in explaining the genetic characteristics of several Columbidae species for the purposes of conservation measures or efforts to preserve Columbidae species at the molecular and population genetic levels.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133891496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Black Scholes Method in Determining Agricultural Insurance Premium Based On Climate Index Using Historical Burn Analysis Method Black Scholes方法在历史烧伤分析法中基于气候指数确定农业保险费中的应用

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.22920

Aminatus Sholiha, M. Fatekurohman, I. Tirta

引用次数: 0

Total Phenolic Content, Antioxidant and Antibacterial Activities of Sargassum polycystum of Ethanol Extract from Waters of Kabung Island 加邦岛水马尾藻乙醇提取物的总酚含量及抗氧化和抗菌活性

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.27199

I. Safitri, W. Warsidah, M. Sofiana, A. A. Kushadiwijayanto, T. Sumarni

{"title":"Total Phenolic Content, Antioxidant and Antibacterial Activities of Sargassum polycystum of Ethanol Extract from Waters of Kabung Island","authors":"I. Safitri, W. Warsidah, M. Sofiana, A. A. Kushadiwijayanto, T. Sumarni","doi":"10.19184/bst.v9i3.27199","DOIUrl":"https://doi.org/10.19184/bst.v9i3.27199","url":null,"abstract":"Sargassum policystum is one of the genus Sargassum from the brown macroalgae group which has an abundance of chemical constituents of fucoidan, fucoxanthin, phenolic acids and alginate which have important biological activities, such as antioxidants and antibacterials. This species thrives in the waters of Kabung Island, Bengkayang, West Kalimantan and has not been exploited so that it tends to act as a marine weed. This study aimed to determine the total phenolic content of the ethanolic extract of S. policystum and its antioxidant and antibacterial activity. Determination of the total content of phenolic compounds using the Folin Ciocalteu method, antioxidant testing using the DPPH method (2,2-diphenyl-1-picrylhydrazyl) and the indicator of sample color change with the addition of these radicals was measured by UV-Vis spectrophotometer. Antibacterial testing was carried out by the test sample diffusion method and the inhibition of the growth of the test bacteria Staphylococcus aureus and Escherichia coli as test bacteria was indicated by the formation of a clear area around the sample wells. The results showed that the phenol content of the ethanolic extract of S. policystum was 79.8 mg/g extract, its antioxidant activity (IC50) was 98.903 ppm, classified as a strong antioxidant, while the comparison antioxidant, Vitamin C, had an IC50 of 6.26 ppm. The inhibitory ability of the ethanol extract against the test bacteria used was indicated by the formation of the largest inhibition diameter on S. aureus of 12.4 mm and E. coli of 12.0 mm.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124218594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3