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PURIFIKASI MINYAK GORENG BEKAS DENGAN PROSES ADSORBSI MENGGUNAKAN ARANG KULIT KACANG TANAH (ARACHIS HYPOGAEA L.)
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.733
M. Mardiana, Tri Santoso
{"title":"PURIFIKASI MINYAK GORENG BEKAS DENGAN PROSES ADSORBSI MENGGUNAKAN ARANG KULIT KACANG TANAH (ARACHIS HYPOGAEA L.)","authors":"M. Mardiana, Tri Santoso","doi":"10.22487/me.v16i1.733","DOIUrl":"https://doi.org/10.22487/me.v16i1.733","url":null,"abstract":"Absorbents have been widely used in purification of used cooking oil to improve the oil quality. This study aimed to determine the quality of used cooking oil after adsorbed using activated charcoal from peanut shells based on the best purification time in accordance with SNI 01-3741-1995. Oil quality parameters used are color, free fatty acid content, peroxide number, iodine number, water content, and oil density. The best results were obtained at 120 minutes purification time with an absorbance value of 0.023 A, free fatty acid content of 0.22%, peroxide number of 1.83 meq/kg, iodine number of 43.40, moisture content of 0.19% and oil density of 0.924 g/mL Only iodine number and oil density from the six parametersthat have not yet met the SNI cooking oil quality requirements.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130610342","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: 2
ANTIOXIDANT ACTIVITY TEST OF LIDAH MERTUA (SANSEVIERIA TRIFASCIATA P.) LEAVES EXTRACT USING 1,1-DIPHENIL-2-PIKRILHIDRAZIL 三叶莲的抗氧化活性试验叶提取物使用1,1-二苯-2-吡唑肼
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.735
Rihanah Rihanah, M. R. Jura
{"title":"ANTIOXIDANT ACTIVITY TEST OF LIDAH MERTUA (SANSEVIERIA TRIFASCIATA P.) LEAVES EXTRACT USING 1,1-DIPHENIL-2-PIKRILHIDRAZIL","authors":"Rihanah Rihanah, M. R. Jura","doi":"10.22487/me.v16i1.735","DOIUrl":"https://doi.org/10.22487/me.v16i1.735","url":null,"abstract":"Antioxidant activity test of lidah mertua (Sansevieria trifasciata P.) leaves extract using 1,1-diphenil-2-picrylhydrazyl has been carried out. The purpose of this study was to determine the antioxidant activity of ethanol extracts of old and young leaves of lidah mertua (Sansevieria trifasciata P.). The radical concentration of 1,1-diphenil-2-picrylhydrazyl (DPPH) after the addition of ethanol extracts of old and young leaves of lidah mertua was determined using a UV-Vis spectrophotometer. The concentrations used in the ethanol extracts of old and young leaves of lidah mertua were 20 ppm, 40 ppm, 60 ppm, 80 ppm and 100 ppm. The IC50 values obtained ​​of ethanol extracts of old and young leaves of lidah mertua were 131.336 ppm and 144.568 ppm respectively, while IC50 value ​​of vitamin C as a comparison was 65.433 ppm. It can be seen that the antioxidant ethanol extracts of old and young leaves of lidah mertua are moderate compared to vitamin C.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122758521","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: 2
PERBEDAAN PEMAHAMAN KONSEP FISIKA PADA PENERAPAN MODEL PEMBELAJARAN GUIDED DISCOVERY BERBANTUAN KOMIK DAN TANPA BANTUAN KOMIK PADA SISWA KELAS VIII SMP AL-AZHAR MANDIRI PALU 物理概念上的差异在于将漫画模式应用于GUIDED DISCOVERY学习模式，而不是漫画学生在自己八年级的爱资哈尔自己的帕拉上
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.729
Sofwiyatul Banat, M. Muslimin, Sahrul Saehana
{"title":"PERBEDAAN PEMAHAMAN KONSEP FISIKA PADA PENERAPAN MODEL PEMBELAJARAN GUIDED DISCOVERY BERBANTUAN KOMIK DAN TANPA BANTUAN KOMIK PADA SISWA KELAS VIII SMP AL-AZHAR MANDIRI PALU","authors":"Sofwiyatul Banat, M. Muslimin, Sahrul Saehana","doi":"10.22487/me.v16i1.729","DOIUrl":"https://doi.org/10.22487/me.v16i1.729","url":null,"abstract":"Penelitian ini bertujuan untuk mengetahui perbedaan pemahaman konsep fisika antara kelas yang menggunakan model pembelajaran guided discovery berbantuan komik dengan kelas yang menggunakan model pembelajaran guided discovery tanpa bantuan komik pada siswa kelas VIII SMP Al-Azhar Mandiri Palu. Penelitian ini tergolong penelitian Quasi Experimental dengan desain Non-Equivalent Control Group. Sampel penelitian ini adalah 47 siswa. Data pemahaman konsep dikumpulkan dengan memberikan tes pemahaman konsep yang terdiri dari 5 soal uraian. Uji hipotesis dilakukan dengan menggunakan uji dua pihak. Berdasarkan hasil uji hipotesis, diperoleh bahwa terdapat perbedaan pemahaman konsep fisika antara kelas yang menggunakan model pembelajaran guided discovery berbantuan komik dengan kelas yang menggunakan model pembelajaran guided discovery tanpa bantuan komik (nilai  thitung = 4,35 > nilai = 2,01). Gain Score kedua kelas tersebut berada pada kriteria sedang. Oleh karena itu, dapat disimpulkan bahwa terdapat perbedaan pemahaman konsep fisika yang kurang signifikan antara kelas yang menggunakan model pembelajaran guided discovery berbantuan komik dengan kelas yang menggunakan model pembelajaran guided discovery tanpa bantuan komik pada siswa kelas VIII SMP Al-Azhar Mandiri Palu.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121870823","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
PENGARUH PENGGUNAAN MEDIA PEMBELAJARAN VIRTUAL LAB BERBASIS ANDROID TERHADAP HASIL BELAJAR FISIKA SISWA KELAS VIII SMPN 3 PALU 以ANDROID为基础的虚拟学习媒体对八年级学生物理学习成绩的影响
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.728
W. Anggraeni, Unggul Wahyono, Darsikin Darsikin
{"title":"PENGARUH PENGGUNAAN MEDIA PEMBELAJARAN VIRTUAL LAB BERBASIS ANDROID TERHADAP HASIL BELAJAR FISIKA SISWA KELAS VIII SMPN 3 PALU","authors":"W. Anggraeni, Unggul Wahyono, Darsikin Darsikin","doi":"10.22487/me.v16i1.728","DOIUrl":"https://doi.org/10.22487/me.v16i1.728","url":null,"abstract":"Penelitian ini bertujuan untuk mengetahui ada tidaknya pengaruh penggunaan media pembelajaran virtual lab berbasis android terhadap hasil belajar fisika siswa kelas VIII SMP N 3 Palu. Jenis penelitian yang digunakan adalah kuasi eksperimen dengan desain the non equivalent pretest-posttest design. Sampel penelitian yaitu kelas VIII-J sebagai kelas eksperimen dan kelas VIII-I sebagai kelas kontrol. Instrumen yang digunakan berupa tes hasil belajar dalam bentuk pilihan ganda yang telah divalidasi oleh validator. Dari analisis data, untuk kelas eksperimen diperoleh nilai rata-rata skor posttest adalah 9,57 dengan standar deviasi sebesar 3,35. Sedangkan kelas kontrol diperoleh nilai rata-rata posttest adalah 7,19 dengan standar deviasi sebesar 3,08. Berdasarkan uji hipotesis (uji-t dua pihak) diperoleh thitung = 2,69 dan t0,95(60) = 1,67 pada taraf nyata  = 0,05. Hal ini berarti H0 ditolak dan H1 diterima. Dengan demikian dapat disimpulkan bahwa ada pengaruh penggunaan media pembelajaran virtual lab berbasis android terhadap hasil belajar fisika siswa kelas VIII SMP N 3 Palu.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132698552","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: 1
ARANG AKTIF SERBUK GERGAJI KAYU JATI (TECTONA GRANDIS L.F) SEBAGAI BAHAN ADSORBEN PADA PEMURNIAN MINYAK JELANTAH
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.732
Nusratullah Nusratullah, Sitti Aminah
{"title":"ARANG AKTIF SERBUK GERGAJI KAYU JATI (TECTONA GRANDIS L.F) SEBAGAI BAHAN ADSORBEN PADA PEMURNIAN MINYAK JELANTAH","authors":"Nusratullah Nusratullah, Sitti Aminah","doi":"10.22487/me.v16i1.732","DOIUrl":"https://doi.org/10.22487/me.v16i1.732","url":null,"abstract":"Used cooking oil can increase the potential for cancer in the body. Therefore, used cooking oil processing efforts were made to improve its quality by using activated charcoal adsorbent of Tectona Grandis L. F sawdust. This study aimed to improve the quality of used cooking oil through refinign by using charcoal adsorbent of Tectona Grandis L.f sawdust. used cooking oil samples were obtained from Ogoamas 1 Village, Sojol Utara District, Donggala Regency. Based on the results of testing the quality of the oil obtained, the water content was 0.22%, free fatty acid content was 0.25% peroxide number was 1.83 meq / Kg, the iodic number was 45, specific gravity was 0.900 g / mL and oil color clear oil with absorbance value was 0.031 A. Based on the quality of several parameters of cooking oil using activated  charcoal of Tectona Grandis L.f sawdust, it has fulfilled the  quality requirements of cooking oil according to SNI 3741-1995.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":" 25","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132010606","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
ANALISIS KUALITAS AIR TANAH DI PETOBO 对PETOBO地下水质量的分析
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.731
P. Hasanah, Irwan Said
{"title":"ANALISIS KUALITAS AIR TANAH DI PETOBO","authors":"P. Hasanah, Irwan Said","doi":"10.22487/me.v16i1.731","DOIUrl":"https://doi.org/10.22487/me.v16i1.731","url":null,"abstract":"The purpose of this study was to determine groundwater quality based on parameters of pH, COD, and BOD levels. These parameters are in accordance with Government Regulation No. 82 the year 2001 that concern the management of water quality and control of water pollution. pH meter was used for pH measurement. For COD concentration, the titrimetric titration was used while the iodometric titration for BOD concentrations. The results showed that the pH value of water was 7.9, the COD level was 7.84 mg/L and the BOD level was 1.68 mg/L. According to Government Regulations No. 82 the year 2001, it states that the level of COD based on its class is 10 mg/L (class I), and BOD based on its class is 2 mg/L. Therefore, the result of the COD and BOD concentrations are below of class 1 standards, it means the groundwater quality for two parameters in the Petobo area is still suitable for daily use.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114238416","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: 1
ANALISIS KADAR KALSIUM OKSIDA (CaO) PADA BATU KARANG DI DAERAH PESISIR BAYANG DAMPELAS DONGGALA
Media Eksakta Pub Date : 2020-05-31 DOI: 10.22487/me.v16i1.734
Annisa Dian Islamiyati, Paulus Hengky Abram
{"title":"ANALISIS KADAR KALSIUM OKSIDA (CaO) PADA BATU KARANG DI DAERAH PESISIR BAYANG DAMPELAS DONGGALA","authors":"Annisa Dian Islamiyati, Paulus Hengky Abram","doi":"10.22487/me.v16i1.734","DOIUrl":"https://doi.org/10.22487/me.v16i1.734","url":null,"abstract":"Coral reefs are classified as coral or coral limestone. These corals contain of a high level of calcium purity with more than 90%. These clacium are in the from calcite (CaCO3). Calcite can be used in the industrial sector wich can be processed into a catalyst and use as a mixture 0f portland cement.its economic value increases by converting CaCO3 to CaO trough the calcination process at high temperatures. The coral sampels were taken from the coastal area of Bayang, Dampelas Donggala wich consisted of 2 samples. i.e coastal and montain coral reefs. The CaO levevls contained in coral reefs wer determined by qualitative and quantitative analysis method using XRF (X-Ray Fluorescence). XRF result showed that were CaO compounds in each coral reef sample. The CaO level in the coastal reef was 92,08% before calcination and 92,11% after calcination. Whereas the CaO level in te mountain coastal reef was 94,51% before calcination and 96,77% after calcination.","PeriodicalId":279720,"journal":{"name":"Media Eksakta","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121380741","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
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