Natural Science: Journal of Science and Technology最新文献

{"title":"Diversity of Hymenoptera Insect in Cowpea (Vigna sinensis L.) Agricultural Area at Martapura District, Banjar Regency, South Kalimantan","authors":"M. Trianto, Fajri Marisa","doi":"10.22487/25411969.2020.v9.i2.15174","DOIUrl":"https://doi.org/10.22487/25411969.2020.v9.i2.15174","url":null,"abstract":"Hymenoptera is one Order of insect which helpful for plant pollination, produces honey and wax, also can eliminate pests, one of which is in cowpea plants. This study aims to determine the diversity of Hymenoptera insects in cowpea (Vigna sinensis L.) agricultural area at Martapura District, Banjar Regency, South Kalimantan. Hymenoptera insect collection is carried out in the villages of Bincau, Labuan Tabu and Indra Sari with two kinds of methods, namely swep net during the day and light trap at night. The results showed that the cowpea agricultural area in Labuan Tabu village had the highest diversity value with a value of H '= 2.58, while the lowest value of H' was 2.28 in Indra Sari Village.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125086901","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}

{"title":"Exploration of Terresterial Fern (Pteridophyta) in Mt. Rore Kautimbu Area Lore Lindu National Park","authors":"Z. Zainudin, Ramadanil Ramadanil","doi":"10.22487/25411969.2020.v9.i2.15017","DOIUrl":"https://doi.org/10.22487/25411969.2020.v9.i2.15017","url":null,"abstract":"The study entitled \"Exploration of Terrestrial Ferns in Mountain of Rore Katimbu, Lore Lindu National Park\" has been carried out from March to September 2019. This study was aimed to describe the species of terrestrial ferns in Mountain of Rore Kautimbu, Lore Lindu National Park. The method was used botanical exploration methods. The results showed that there were 19 species consisted of 13 families of terrestrial ferns. Mostly, ferns were distributed in the tropics and subtropics area. Species that only distributed naturally in Sulawesi dan Maluku was Alsophila celebica (Blume) Mett.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132399222","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}

{"title":"Formation and Characterization of mini-emulsion P3HT PCBM Nanoparticles","authors":"D. Darwis","doi":"10.22487/25411969.2020.v9.i2.15248","DOIUrl":"https://doi.org/10.22487/25411969.2020.v9.i2.15248","url":null,"abstract":"This report presents the synthesis of nanoparticulate suspensions of P3HT:PCBM  for organic photovoltaic active layer through  a mini-emulsion process with the used of sodium dodecyl sulphate (SDS) as the surfactant. A series of characterization for the nanoparticles using Dynamic Light Scattering (DLS), Ultraviolet–visible spectroscopy, (UV-VIS), Photolumination (PL), Transmission, Electron Microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) also demonstrated. The  P3HT/PCBM nanoparticle performances are comparable to P3HT/PCBM solution in chloroform and met the requirement for use in organic Photovoltaic fabrication","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"43 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114112693","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}

{"title":"Molecular Diagnosis of Schistosomiasis in Feces Samples From Napu Valley Community of Poso Regency, Central Sulawesi, Indonesia","authors":"Nur Indang","doi":"10.22487/25411969.2020.v9.i1.15018","DOIUrl":"https://doi.org/10.22487/25411969.2020.v9.i1.15018","url":null,"abstract":"Schistosomiasis is infection caused by Schistosoma worms. Schistosomiasis in Indonesia caused by a worm of Schistosoma japonicum, which is an endemic disease and it is only found in Central selawesi, in high land of Napu Valley, Lindu, and Bada villages. Prevalence of schistosomiasis during 2001-2010 experienced fluctuation, which the lowest prevalence was in 2003, it was 0.70%, and the highest prevalence was in 2010, it was 5.68%. In 2012, the proportion of schistosomiasis case in Napu was 1.44%. From 15 Sub-districts examined in Napu Highland area, there were 12 sub-districts which had the prevalence above the WHO standard of 1%. Routine inspection was conducted by the Department of Health-Central Sulawesi microscopically based on Kato-Katz method. Target of this study is to find out comparation accuration data resulted from molecular examination by PCR method, compare to the results of microscopic examination based on Kato-Katz method. This research was an observational descriptive research. Molecular examination by PCR method was done using primers sequencing of forward 5’-TCT AAT GCT ATT GGT TTG AGT-3’ and reverse 5’-TTC CTT ATT TTC ACA AGG TGA-3’. The target umplification was DNA of SjR2 gene, at 230 bp band. Preserved feces samples was done using ethanol 96% at Dodolo village, that have been previously examined microscopically using Kato-Katz method. Based on microscopic examination on 70 samples, 19 sample was positive infected by the worm of S japonicum, and 51 sample of them was  shown negative result. Upon further investigation molecularly by PCR, there were 40 people positively detected for infection by the worm S. japonicum, which was shown by appearing on the target band of 230 bp, while 30 others samples were declared negatively. Molecular examination data showed two times more likely in detecting schistosomiasis, compared to microscopic examination by the Kato-Katz method. Our data also showed that Molecular examination using PCR method can be used for 70-96% ethanol-preserved facel samples.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121875123","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}

{"title":"Process of Activated Carbon form Coconut Shells Through Chemical Activation","authors":"E. Saputro, Varadilla Dwi Retno Wulan, Bellani Yunfa Winata, R. Yogaswara, N. K. Erliyanti","doi":"10.22487/25411969.2020.V9.I1.15042","DOIUrl":"https://doi.org/10.22487/25411969.2020.V9.I1.15042","url":null,"abstract":"Carbon or charcoal can be made from biomass or cellulose-containing materials such as coconut shells or candlenut shells using a thermal process. One of the thermal process is pyrolysis, which in this process, the material is converted to carbon. The results of pyrolysis are in the form of three types of products namely solids (charcoal / carbon), gas (fuel gas) and liquid (bio-oil). Other products are gases such as carbon dioxide (CO2), methane (CH4) and some gases that have small contents. In general, the pyrolysis process takes place at temperatures above 300 ° C within 4-7 hours. Carbonized carbon or pyrolysis does not have a large adsorption capacity because the pore structure does not develop, so it is need activation process. One way to activate carbon is chemical activation. There is a need to know the best material for activating carbon through chemical process. This article aims to discuss the advantages and disadvantages of various types of chemical activation and to determine the promising chemical for activation. From various methods of chemical activation, the activator that promises to make activated carbon is Phosphoric Acid (H3PO4) because it can produce activated carbon which has a maximum micropore at operating conditions <450oC with a weight percent ratio between activator and sample around 29 - 52%.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125708197","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}

{"title":"Weed Plant in Cacao and Clove Plantations in Lakatan Village, Tolitoli Regency, Central Sulawesi","authors":"M. Iqbal, H. Hairil","doi":"10.22487/25411969.2020.v9.i1.15037","DOIUrl":"https://doi.org/10.22487/25411969.2020.v9.i1.15037","url":null,"abstract":"Diversity of weeds in Cacao plantations and Clove plantations at Lakatan Village, Tolitoli Regency, Central Sulawesi was conducted in May to August 2019. The method used is a double plot method with 16 plots and divided into two parts, 8 plots on cacao plantations and 8 plots on clove plantations randomly placed. Each type of weed contained in the plot was recorded and collected for the manufacture of herbarium specimens, identification was carried out at the Plant Biosystematics Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, Tadulako University. The results showed 17 families with 29 species of weed in both plantation areas, 21 species in cacao plantations and 23 species in clove plantations. Families that are often found in both  are Asteraceae and Poaceae.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122059063","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}

{"title":"Spatial Logistic Regression Modeling With Inverse Weighting Distance For Open Unemployment In Districts/Cities On The Island Of Sulawesi","authors":"Broklyn Pippo Marchegiani Baebae, Nur’eni Nur’eni, I. Setiawan","doi":"10.22487/25411969.2020.V9.I1.15040","DOIUrl":"https://doi.org/10.22487/25411969.2020.V9.I1.15040","url":null,"abstract":"Unemployment is a condition where a person does not have a job, but is looking for a job. To see the unemployment situation in an area, logistic regression analysis can be used. Logistic regression is an analysis used to see the relationship between the response variable (Y) which is binary and the explanatory variable (X) which is categorical or continuous. The application of logistic regression often has a spatial influence on the model. In this study to model the open unemployment rate the spatial logistic regression method is used. Spatial logistic regression is logistic regression analysis by incorporating spatial influences into the model. Spatial dependency testing is used by Moran’s I Test. The weighting matrix used is the distance inverse weighting matrix. The results obtained, the value of Moran's I Test with a p-value of 2.14 x 10-12 <α (0.05), meaning that there is a spatial influence on the level of open unemployment on the island of Sulawesi. So the spatial logistic regression model is obtained as follows :g(x)    = 4,848 0,000002885(X1) 0,0473(X2) 0,006669(X3) 0,04263(X4) 0,269(X5) 0,1642(X6) 1,531(X7) 0,1581(X8) 0,2208(X9) 0,009732(X10) 0,01871(Z)Spatial factors affect the level of open unemployment based on the significance value <α (0.05)","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122753681","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}

{"title":"Potential Study on Soil Arthropods Diversity as Vegetation Bioindicators at Puthuk Siwur and Mount Pundak Hiking Trails District of Mojokerto","authors":"Muhibbuddin Abdillah, M. Anwar","doi":"10.22487/25411969.2020.V9.I1.15034","DOIUrl":"https://doi.org/10.22487/25411969.2020.V9.I1.15034","url":null,"abstract":"Puthuk Siwur and Mount Pundak located at Mojokerto Region. Soil athropods having important role on ecosystem including the vegetations. This study was aimed for understand the potential of soil arthropods diversity as an vegetation bioindicators. Based on the results some family having potential to correlate with the vegetations on its habitat. Formicidae Family having potential as predators at a location that some of the vegetation producing fruits. Staphinilidae Family having potential for correlated with vegetation that produce leaf debris on high amount. Entomobrydae family having potential for correlated with decomposing activity of dying vegetation bodies at high altitude.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125576338","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}

{"title":"Isolasi dan Karakterisasi Bakteri yang Bersimbiosis dengan Spons","authors":"M. Megawati, Meryany Ananda, I. N. Suwastika","doi":"10.22487/25411969.2019.v8.i3.14957","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14957","url":null,"abstract":"Bakteri  mampu bersimbiosis dengan spons karena memiliki hubungan simbiosis secara mutualisme antara spons dengan bakteri dalam  penelitian  ini bertujuan memperoleh  isolat  bakteri  dan mengetahui karakteristik bakteri yang bersimbiosis dengan spons, spons diambil di Perairan Teluk Tomini Sulawesi Tengah dengan  menggunakan pisau. Sampel kemudian dimasukkan dalam botol steril  yang diisi dengan air laut steril dan gliserol  30%. Bakteri pada sampel diisolasi pada media  SWC dengan metode spread  plate dari hasil isolasi terdapat tiga isolat,  isolat terdapat tiga yang isolat yang dilanjutkan untuk ketahap karakterisasi yakni (BS 1, BS 3 dan BS 10).","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129482913","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}

{"title":"Penerapan Artificial Neural Network Terhadap Identifikasi Wajah Menggunakan Metode Backpropagation","authors":"Mimin Hendriani, Rais, Lilies Handayani","doi":"10.22487/25411969.2019.v8.i3.14599","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14599","url":null,"abstract":"Backpropagation is one of the supervised training methods that causes an error in the output produced. Backpropagation neural networks will be carried out in 3 stages, namely feedforward from input training patterns, backpropagation from errors related to adjustment of weights. Updating the weight is done when the training results obtained have not been converged. The value of the goal error (MSE) is 0.0070579 which is achieved at epochs to 99994 from the provisions of 100000 iterations. Based on the plot regression, the training data resulted in a correlation coefficient value of up to 0.55321. The correlation coefficient value is concluded that the greater the R value produced, the better the level of accuracy in face identification carried out in this study","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122128078","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}