Pub Date : 2020-05-18DOI: 10.35799/JMUO.9.2.2020.28565
Saadah D. Rachman, Tysza Ainnunnisa Maulidya Putri, Agus Safari, N. I. Anggraeni, M. Fadhlillah, S. Ishmayana
Selama proses fermentasi bioetanol, ragi Saccharomyces cerevisiae terpapar berbagai cekaman lingkungan. Ion logam yang berpotensi untuk meningkatkan kinerja fermentasi dan toleransi sel terhadap cekaman ialah ion logam besi II (Fe2+) yang berperan sebagai kofaktor dalam berbagai proses metabolisme. Tujuan dari penelitian ini adalah mempelajari pengaruh suplementasi ion Fe2+ dalam media fermentasi terhadap kinerja fermentasi, serta toleransi sel ragi terhadap cekaman etanol, oksidatif, asam lemah dan tekanan osmotik. Penelitian diawali dengan melakukan fermentasi glukosa menggunakan S. cerevisiae A12 selama 120 jam dengan pengambilan sampel dengan interval waktu 6 jam untuk 24 jam pertama serta 12 jam untuk sisanya. Masing-masing sampel ditentukan nilai OD600nm, persentase sel hidup, jumlah sel hidup, kadar glukosa, kadar etanol. Pada jam ke 24, sel diuji daya tahannya terhadap cekaman. Hasil penelitian menunjukkan bahwa suplementasi ion logam Fe2+ hanya mampu meningkatkan laju produksi etanol, tetapi tidak mempengaruhi parameter lain.During bioethanol fermentation process, Saccharomyces cerevisiae yeast cells are exposed to various environmental stress factors. One of metal ions that have potency for improving fermentation performance and yeast stress tolerance is ferrous ion (Fe2+) that acts as cofactors in various metabolism process. The present study was directed to investigate the effect of ferrous ion supplementation to the fermentation media on fermentation performance, improving yeast stress tolerance against ethanol, oxidative, weak acid and hyperosmotic stresses. The fermentation was conducted by fermenting glucose using S. cerevisiae strain A12 for 120 hours. The sampling was performed every 6 hours during the first 24 hours and 12 hours for the rest of fermentation. The sample was examined for their OD600nm, total cell number, viable cell number, glucose content and ethanol content. At 24 hours the cell was examined for their stress tolerance. The result of the present study indicates that supplementation using ferrous ion improve the rate of ethanol production, but not other parameters.
{"title":"Pengaruh Suplementasi Ion Logam Besi Terhadap Kinerja Fermentasi dan Toleransi Sel Ragi Saccharomyces cerevisae terhadap Cekaman Lingkungan","authors":"Saadah D. Rachman, Tysza Ainnunnisa Maulidya Putri, Agus Safari, N. I. Anggraeni, M. Fadhlillah, S. Ishmayana","doi":"10.35799/JMUO.9.2.2020.28565","DOIUrl":"https://doi.org/10.35799/JMUO.9.2.2020.28565","url":null,"abstract":"Selama proses fermentasi bioetanol, ragi Saccharomyces cerevisiae terpapar berbagai cekaman lingkungan. Ion logam yang berpotensi untuk meningkatkan kinerja fermentasi dan toleransi sel terhadap cekaman ialah ion logam besi II (Fe2+) yang berperan sebagai kofaktor dalam berbagai proses metabolisme. Tujuan dari penelitian ini adalah mempelajari pengaruh suplementasi ion Fe2+ dalam media fermentasi terhadap kinerja fermentasi, serta toleransi sel ragi terhadap cekaman etanol, oksidatif, asam lemah dan tekanan osmotik. Penelitian diawali dengan melakukan fermentasi glukosa menggunakan S. cerevisiae A12 selama 120 jam dengan pengambilan sampel dengan interval waktu 6 jam untuk 24 jam pertama serta 12 jam untuk sisanya. Masing-masing sampel ditentukan nilai OD600nm, persentase sel hidup, jumlah sel hidup, kadar glukosa, kadar etanol. Pada jam ke 24, sel diuji daya tahannya terhadap cekaman. Hasil penelitian menunjukkan bahwa suplementasi ion logam Fe2+ hanya mampu meningkatkan laju produksi etanol, tetapi tidak mempengaruhi parameter lain.During bioethanol fermentation process, Saccharomyces cerevisiae yeast cells are exposed to various environmental stress factors. One of metal ions that have potency for improving fermentation performance and yeast stress tolerance is ferrous ion (Fe2+) that acts as cofactors in various metabolism process. The present study was directed to investigate the effect of ferrous ion supplementation to the fermentation media on fermentation performance, improving yeast stress tolerance against ethanol, oxidative, weak acid and hyperosmotic stresses. The fermentation was conducted by fermenting glucose using S. cerevisiae strain A12 for 120 hours. The sampling was performed every 6 hours during the first 24 hours and 12 hours for the rest of fermentation. The sample was examined for their OD600nm, total cell number, viable cell number, glucose content and ethanol content. At 24 hours the cell was examined for their stress tolerance. The result of the present study indicates that supplementation using ferrous ion improve the rate of ethanol production, but not other parameters.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89749693","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}
Pub Date : 2020-05-06DOI: 10.35799/JMUO.9.2.2020.28348
D. Pandara, Ferdy Ferdy, Guntur Pasau, V. Suoth
Lokon eruption Degassing Hibrid Earthquake LP Earthquake Percursor It is interesting to study of the dynamics of Lokon volcano eruption on September 12, 2014 because they were different from previous eruptions. This research was conducted to investigate the seismic precursors triggered the eruption. Seismovolcanalysis software was used to classify type and number, dominant frequency, duration and energy of earthquakes between September 1-12, 2014. Result showed the Hybrid and LP events play an important role as a precursor eruption. Increasing Hybrid and LP events allegedly associated with increased degassing process in the conduit. A further study is needed to investigate source mechanism of the LP and Hybrid events.
{"title":"Analisis Prekursor Erupsi Gunung Lokon Tanggal 12 September 2014","authors":"D. Pandara, Ferdy Ferdy, Guntur Pasau, V. Suoth","doi":"10.35799/JMUO.9.2.2020.28348","DOIUrl":"https://doi.org/10.35799/JMUO.9.2.2020.28348","url":null,"abstract":"Lokon eruption Degassing Hibrid Earthquake LP Earthquake Percursor It is interesting to study of the dynamics of Lokon volcano eruption on September 12, 2014 because they were different from previous eruptions. This research was conducted to investigate the seismic precursors triggered the eruption. Seismovolcanalysis software was used to classify type and number, dominant frequency, duration and energy of earthquakes between September 1-12, 2014. Result showed the Hybrid and LP events play an important role as a precursor eruption. Increasing Hybrid and LP events allegedly associated with increased degassing process in the conduit. A further study is needed to investigate source mechanism of the LP and Hybrid events.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72893054","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}
Pub Date : 2020-03-26DOI: 10.35799/JMUO.9.2.2020.28248
Natalia Lumentut, Hosea Jaya Edi, E. Rumondor
Penelitian ini bertujuan untuk melihat stabilitas fisik dari formulasi sediaan krim ekstrak etanol kulit buah pisang Goroho pada konsentrasi 12.5%. Evaluasi sifat fisik meliputi uji organoleptik, homogenitas, pH, daya sebar dan daya lekat. Uji stabilitas dilakukan menggunakan metode cycling test selama 6 siklus dengan menguji kembali sifat fisiknya. Hasil pengujiann sifat fisik (siklus 0) sediaaan krim yaitu uji organoleptik (bau: khas etanol buah pisang; warna: hijau; tekstur: semi solid), homogenitas (susunan homogen), pH 5.04±0.25, daya sebar 3.43±0.12 cm, daya lekat 30.55±2.09 detik, dan uji stabilitas selama cycling test (siklus 1-siklus 6) tidak ada perbedaan yang bermakna.The aim of this research was to determine the physical stability of the cream ethanol extract of Goroho banana peels at a concentration of 12.5%. Evaluation of physical properties includes organoleptic test, homogeneity, pH, dispersibility and adhesion. The stability test was carried out using the cycling test method for 6 cycles by re-testing its physical properties. Test result of physical properties (cycle 0) cream preparation, namely organoleptic test (odor: typical of banana ethanol, color: green, texture: semi-solid), homogeneity (homogeneous arrangement), pH 5.04 ± 0.25, spread capacity 3.43 ± 0.12 cm and power sticky 30.55 ± 0.12 seconds, and the stability test during the cycle test there was no significant difference.
{"title":"Formulasi dan Uji Stabilitas Fisik Sediaan Krim Ekstrak Etanol Kulit Buah Pisang Goroho (Musa acuminafe L.) Konsentrasi 12.5% Sebagai Tabir Surya","authors":"Natalia Lumentut, Hosea Jaya Edi, E. Rumondor","doi":"10.35799/JMUO.9.2.2020.28248","DOIUrl":"https://doi.org/10.35799/JMUO.9.2.2020.28248","url":null,"abstract":"Penelitian ini bertujuan untuk melihat stabilitas fisik dari formulasi sediaan krim ekstrak etanol kulit buah pisang Goroho pada konsentrasi 12.5%. Evaluasi sifat fisik meliputi uji organoleptik, homogenitas, pH, daya sebar dan daya lekat. Uji stabilitas dilakukan menggunakan metode cycling test selama 6 siklus dengan menguji kembali sifat fisiknya. Hasil pengujiann sifat fisik (siklus 0) sediaaan krim yaitu uji organoleptik (bau: khas etanol buah pisang; warna: hijau; tekstur: semi solid), homogenitas (susunan homogen), pH 5.04±0.25, daya sebar 3.43±0.12 cm, daya lekat 30.55±2.09 detik, dan uji stabilitas selama cycling test (siklus 1-siklus 6) tidak ada perbedaan yang bermakna.The aim of this research was to determine the physical stability of the cream ethanol extract of Goroho banana peels at a concentration of 12.5%. Evaluation of physical properties includes organoleptic test, homogeneity, pH, dispersibility and adhesion. The stability test was carried out using the cycling test method for 6 cycles by re-testing its physical properties. Test result of physical properties (cycle 0) cream preparation, namely organoleptic test (odor: typical of banana ethanol, color: green, texture: semi-solid), homogeneity (homogeneous arrangement), pH 5.04 ± 0.25, spread capacity 3.43 ± 0.12 cm and power sticky 30.55 ± 0.12 seconds, and the stability test during the cycle test there was no significant difference.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81229474","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}
Pub Date : 2020-03-18DOI: 10.35799/JMUO.9.2.2020.28231
Thevitha Refiani Viola, As'ari As'ari, S. H. Tongkukut, Zetly Estefanus Tamod, Deny Ramon Tatuwo, Lynda Hartaty, Eva M. R. Mukuan, Delfy Boobu Abjul, Christin Malinggas
Sistem hidrologi suatu daerah dipengaruhi oleh bentuk topografi permukaan yang merupakan daerah tangkapan air hujan. Air hujan yang mengalami infiltrasi ke dalam tanah menjadi aliran air tanah yang mempunyai pola hidrologi tertentu. Pemetaan hidrologi air tanah bawah permukaan telah dilakukan di Kawasan Ilo-Ilo desa Wori menggunakan metode geolistrik resistivitas konfigurasi wenner Alpha. Pengukuran dilakukan pada 4 lintasan dengan spasi elektroda 10 m, 48 elektroda dan panjang setiap lintasan 480 m. Daerah penelitian terbagi menjadi 2 pola sistem hidrologi yang terpisah yaitu hasil penelitian menunjukkan bahwa lintasan 3 merupakan area yang mempunyai akuifer paling besar dan permukaannya merupakan daerah tangkapan air. Air tanah cenderung mengalir ke arah lintasan 3, karena kondisi akuifer yang lebih dalam (> 60 m) pada kedua sistem hidrologiThe hydrological system of an area is affected by the shape of the surface topography which is a rainwater catchment area. Rainwater infiltrated into the soil becomes a groundwater flow that has a certain hydrological pattern. The mapping of subsurface hydrological groundwater in the Ilo-Ilo area of Wori village using the Wenner Alpha configuration of resistivity geoelecrical methods has been done. Measurements was made on 4 path with 10 m electrode spacing, 48 electrodes and length of each path is 480 m. The study area is divided into 2 separate hydrological system patterns. The result show us that path 3 is the area that has the largest aquifer and its surface is a water catchment area. Groundwater tends to flow toward path 3, due to deeper aquifer conditions (> 60 m) in both hydrological systems
{"title":"Hidrologi Bawah Permukaan Tanah: Studi kasus di Lokasi Pra TPA Kawasan Ilo Ilo Kecamatan Wori Kabupaten Minahasa Utara","authors":"Thevitha Refiani Viola, As'ari As'ari, S. H. Tongkukut, Zetly Estefanus Tamod, Deny Ramon Tatuwo, Lynda Hartaty, Eva M. R. Mukuan, Delfy Boobu Abjul, Christin Malinggas","doi":"10.35799/JMUO.9.2.2020.28231","DOIUrl":"https://doi.org/10.35799/JMUO.9.2.2020.28231","url":null,"abstract":"Sistem hidrologi suatu daerah dipengaruhi oleh bentuk topografi permukaan yang merupakan daerah tangkapan air hujan. Air hujan yang mengalami infiltrasi ke dalam tanah menjadi aliran air tanah yang mempunyai pola hidrologi tertentu. Pemetaan hidrologi air tanah bawah permukaan telah dilakukan di Kawasan Ilo-Ilo desa Wori menggunakan metode geolistrik resistivitas konfigurasi wenner Alpha. Pengukuran dilakukan pada 4 lintasan dengan spasi elektroda 10 m, 48 elektroda dan panjang setiap lintasan 480 m. Daerah penelitian terbagi menjadi 2 pola sistem hidrologi yang terpisah yaitu hasil penelitian menunjukkan bahwa lintasan 3 merupakan area yang mempunyai akuifer paling besar dan permukaannya merupakan daerah tangkapan air. Air tanah cenderung mengalir ke arah lintasan 3, karena kondisi akuifer yang lebih dalam (> 60 m) pada kedua sistem hidrologiThe hydrological system of an area is affected by the shape of the surface topography which is a rainwater catchment area. Rainwater infiltrated into the soil becomes a groundwater flow that has a certain hydrological pattern. The mapping of subsurface hydrological groundwater in the Ilo-Ilo area of Wori village using the Wenner Alpha configuration of resistivity geoelecrical methods has been done. Measurements was made on 4 path with 10 m electrode spacing, 48 electrodes and length of each path is 480 m. The study area is divided into 2 separate hydrological system patterns. The result show us that path 3 is the area that has the largest aquifer and its surface is a water catchment area. Groundwater tends to flow toward path 3, due to deeper aquifer conditions (> 60 m) in both hydrological systems","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89631474","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}
Medication Error Prescribing Dispensing Interna Station Medication error is a condition that can harm and even endanger patient safety carried out by medical workers, especially in terms of patient treatment services. This study aims to determine the percentage of medication errors during the prescribing and dispensing phase at the Interna station of X Hospital in Manado City. This research is a descriptive analysis with prospective data collection. The results showed that medication errors that occurred during the prescribing phase included the recipe cannot be read 3%, no doctor's name in prescription 0.33%, no doctor's initial 0.33%, incorrect/unclear patient name 4.98%, no patient age 72.75%, no concentration/dosage of drugs 12.62%, no amount of drugs 0.33%, no dosage form 11.62%, and no complete prescription of prescription only medicine 0.66%. While medication errors in the dispensing phase include taking the wrong drug 0.33% and the amount of drug delivered is less than 1.66%. Based on the results of the study, it can be concluded that the incidence of medication errors at Interna station of X Hospital in Manado city mostly occurs in the prescribing phase.
{"title":"Identifikasi Medication Error di Poli Interna Rumah Sakit X di Kota Manado","authors":"Gayatri Citraningtyas, Leydia Angkoauwa, Tiansi Maalangen","doi":"10.35799/JMUO.9.1.2020.27789","DOIUrl":"https://doi.org/10.35799/JMUO.9.1.2020.27789","url":null,"abstract":"Medication Error Prescribing Dispensing Interna Station Medication error is a condition that can harm and even endanger patient safety carried out by medical workers, especially in terms of patient treatment services. This study aims to determine the percentage of medication errors during the prescribing and dispensing phase at the Interna station of X Hospital in Manado City. This research is a descriptive analysis with prospective data collection. The results showed that medication errors that occurred during the prescribing phase included the recipe cannot be read 3%, no doctor's name in prescription 0.33%, no doctor's initial 0.33%, incorrect/unclear patient name 4.98%, no patient age 72.75%, no concentration/dosage of drugs 12.62%, no amount of drugs 0.33%, no dosage form 11.62%, and no complete prescription of prescription only medicine 0.66%. While medication errors in the dispensing phase include taking the wrong drug 0.33% and the amount of drug delivered is less than 1.66%. Based on the results of the study, it can be concluded that the incidence of medication errors at Interna station of X Hospital in Manado city mostly occurs in the prescribing phase.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87209145","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}
Pub Date : 2020-01-24DOI: 10.35799/jmuo.9.1.2020.27677
Christian Imanuel Ango, D. Pandara, Ferdy Ferdy, S. H. Tongkukut
Mount Lokon TEC-Ionosfer Anomaly, Sliding Interquartile Method, Eruption Precursor. Mount Lokon, located in North Sulawesi is among the most active volcanoes in Indonesia. Before the eruption occurred, there was a pre-eruption activity that triggered anomaly on Total Electron Content (TEC) in the ionosphere. TEC anomaly that mark the eruption are assumed as precursors of eruption that can be useful for disaster eruption mitigation efforts. The purpose of this study was to investigate the TEC anomaly before the Lokon eruption on July 14, 2011. Investigation of TEC by using the Sliding Interquartile method, the results showed that an TEC anomaly occurred 3 days before the eruption on July 11, 2011.These indicates the presence of pre-eruptive activity that affects the quantity of TEC in the ionosphere.
{"title":"Investigasi Anomali TEC-Ionosfer Sebelum Letusan Gunung Lokon 14 Juli 2011 Menggunakan Metode Sliding Interquartile","authors":"Christian Imanuel Ango, D. Pandara, Ferdy Ferdy, S. H. Tongkukut","doi":"10.35799/jmuo.9.1.2020.27677","DOIUrl":"https://doi.org/10.35799/jmuo.9.1.2020.27677","url":null,"abstract":"Mount Lokon TEC-Ionosfer Anomaly, Sliding Interquartile Method, Eruption Precursor. Mount Lokon, located in North Sulawesi is among the most active volcanoes in Indonesia. Before the eruption occurred, there was a pre-eruption activity that triggered anomaly on Total Electron Content (TEC) in the ionosphere. TEC anomaly that mark the eruption are assumed as precursors of eruption that can be useful for disaster eruption mitigation efforts. The purpose of this study was to investigate the TEC anomaly before the Lokon eruption on July 14, 2011. Investigation of TEC by using the Sliding Interquartile method, the results showed that an TEC anomaly occurred 3 days before the eruption on July 11, 2011.These indicates the presence of pre-eruptive activity that affects the quantity of TEC in the ionosphere.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86533428","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}
Pub Date : 2020-01-20DOI: 10.35799/jmuo.9.1.2020.27420
Engellita Maneking, Hanny F. Sangian, S. H. Tongkukut
Bioplastics, Cassava Starch, Glycerol, Alcohol This study aims to create and characterize bioplastics that utilize cassava biomass. The making of bioplastics is carried out for two variations of mixture, namely cassava starch as the material-based, glycerol + water as plasticizer, acetic acid (vinegar) as a catalyst and the second variation with the same combination with the addition of alcohol as a comparison. Characterization of bioplastics includes surface observations using SEM; crystallinity using XRD; determination of functional groups using FTIR; and analyzing of thermal properties using TGA and DSC. The characterization results show that bioplastics with a combination of cassava starch + glycerol + water + acetic acid (vinegar) + alcohol have a high degree of degradation. This is in accordance with the XRD analysis where this combination has a low crystallinity value. IR spectra showed that the presence of C-H Alkana groups, C = O esters, and C-H alkenes. While the SEM results showed a flat surface and the results of the TGA / DSC analysis which showed a mass reduction of 2.3234 mg.
{"title":"Pembuatan dan Karakterisasi Bioplastik Berbahan Dasar Biomassa dengan Plasticizer Gliserol","authors":"Engellita Maneking, Hanny F. Sangian, S. H. Tongkukut","doi":"10.35799/jmuo.9.1.2020.27420","DOIUrl":"https://doi.org/10.35799/jmuo.9.1.2020.27420","url":null,"abstract":"Bioplastics, Cassava Starch, Glycerol, Alcohol This study aims to create and characterize bioplastics that utilize cassava biomass. The making of bioplastics is carried out for two variations of mixture, namely cassava starch as the material-based, glycerol + water as plasticizer, acetic acid (vinegar) as a catalyst and the second variation with the same combination with the addition of alcohol as a comparison. Characterization of bioplastics includes surface observations using SEM; crystallinity using XRD; determination of functional groups using FTIR; and analyzing of thermal properties using TGA and DSC. The characterization results show that bioplastics with a combination of cassava starch + glycerol + water + acetic acid (vinegar) + alcohol have a high degree of degradation. This is in accordance with the XRD analysis where this combination has a low crystallinity value. IR spectra showed that the presence of C-H Alkana groups, C = O esters, and C-H alkenes. While the SEM results showed a flat surface and the results of the TGA / DSC analysis which showed a mass reduction of 2.3234 mg.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88039628","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}
Pub Date : 2020-01-13DOI: 10.35799/jmuo.9.1.2020.27159
A. Tangapo
Acterial Community CLPP Ipomoea batatas Endophytes Rhizosphere Total metabolic activity of endophytic and rhizosphere of bacterial community of sweet potato was measured to compare the community-level physiological profiles (CLPP) using by Biolog Ecoplates. Result of our study revealed that bacterial density increased in the following order: endophytes < rhizosphere. The microbial diversity assessed by species richness, the total number of species present and species evenness. The highest total microbial activity was observed for the rhizosphere. The CLPP revealed that the bacteria could differentially utilize all the groups of carbon sources as follows carbohydrate, amino acid, carboxilyc acid, polymer, amine/amide, and phenolic compound. Carbohydrate was most utilized.
{"title":"Potensi Metabolik Komunitas Bakteri Endofit dan Rhizosfer Ubi Jalar (Ipomoea batatas L.) Berdasarkan Analisis Community-Level Physiological Profiles (CLPP)","authors":"A. Tangapo","doi":"10.35799/jmuo.9.1.2020.27159","DOIUrl":"https://doi.org/10.35799/jmuo.9.1.2020.27159","url":null,"abstract":"Acterial Community CLPP Ipomoea batatas Endophytes Rhizosphere Total metabolic activity of endophytic and rhizosphere of bacterial community of sweet potato was measured to compare the community-level physiological profiles (CLPP) using by Biolog Ecoplates. Result of our study revealed that bacterial density increased in the following order: endophytes < rhizosphere. The microbial diversity assessed by species richness, the total number of species present and species evenness. The highest total microbial activity was observed for the rhizosphere. The CLPP revealed that the bacteria could differentially utilize all the groups of carbon sources as follows carbohydrate, amino acid, carboxilyc acid, polymer, amine/amide, and phenolic compound. Carbohydrate was most utilized.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87368496","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}
Pub Date : 2020-01-09DOI: 10.35799/jmuo.9.1.2020.27082
Febrianti Mangensiga, As'ari As'ari, Adey Tanauma
Penelitian ini bertujuan untuk memetakan struktur bawah permukaan di area manifestasi lumpur panas di Desa Karumenga dan menginvestigasi sebaran lumpur panas. Akuisisi data dengan jumlah lintasan 4 yang masing-masing panjang lintasannya yaitu 240 m untuk lintasan 1 dan lintasan 3, 160 m pada lintasan 2, dan 480 m pada lintasan 4. Data lapangan diukur menggunakan resistivity and IP meter MAE-X612-EM menggunakan metode geolistrik tahanan jenis konfigurasi dipol-dipol. Data pengukuran kemudian diolah menggunakan Software Res2dinv . Hasil berupa model tampang lintang 2D bawah permukaan, lumpur panas diidentifikasi dengan nilai tahanan jenis 13,9 Ωm sampai 80 Ωm. Pada lintasan 1 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 32,5 m. Lintasan 2 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 24,5 m. Lintasan 3 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 33,5 m. Pada lintasan 4 lumpur panas tersebar disepanjang lintasan dengan kedalaman 32 m. Berdasarkan hasil analisis sebaran lumpur panas, diperoleh informasi tingkat kerawanan daerah penelitian dengan menggunakan Software Surfer 11. This study aims to map subsurface structures in the area of hot mud manifestations in Karumenga Village and investigate the distribution of hot mud. Data acquisition with the number of lines 4 with a length of 240 m for line 1 and line 3, 160 m for line 2, and 480 m for line 4. Field data were measured using a resistivity and IP meter MAE-X612-EM using the dipole-dipole configuration resistivity geoelectric method. The measurement. Data is processed using Res2dinv Software. The results are in the form of 2D subsurface models, hot mud identified with resistivity values of 13.9 to 80 Ωm. Line 1, the hot mud is present along the line with depths ranging from 0 to 32.5 m. Line 2, hot mud is appear along the line with depths varying from 0 to 24.5 m. Line 3, hot mud is located along the line with depths varying from 0 to 33.5 m. Line 4, hot mud is spread along the line with a depth of ≤ 32 m. Based on the analysis of the hot mud distribution, it is obtained information on the level of vulnerability of the study area by using Surfer 11 Software.
这项研究的目的是绘制Karumenga村滚烫泥浆出现地区的地下结构，并进行调查。4号轨道长度为240米(240英尺)，3圈160米(160米)，2圈160米(300英尺)，4圈480米(300英尺)。现场数据使用区域性电阻和IP米jee - x612 - em使用极光配置类型的位置位置测量。然后使用re2dinv软件进行测量数据。结果是纬度2D表面之下,泥浆热表情识别模型和价值类型的囚犯13,9Ω80Ωm。在1号轨道上，热泥沿着这条轨道生长，深度从0到32.5米(200到32.5英尺)不等。2热泥浆沿着这条轨道运行，深度在0到24.5米之间。热泥3号轨道沿着这条轨道运行，深度从0到33.5米不等。在4号轨道上，热泥浆沿着这条轨道散布，深度为32米(200英尺)。根据分析热泥的结果，通过11冲浪软件获得了研究区域不匹配的信息。这项研究是对热泥地区的泥图集结构的研究。数据与数字行4的步调一致，第一行和第3行240米，第2行160米，第4行480米，第4行480米。数据场采用了电阻和IP米乘e- x612《测量。数据正在处理re2dinv软件。The results 2D are in The form of subsurface models,热泥浆和resistivity identified 13 . 9到公元80Ω的价值观。第一行，热泥沿着直线上升，从0到32.5米。第2行，热泥在这条线上出现，从0米到24米。第3行，热泥沿着这条线移动，从0米到33.5米。4排,一起跟着热泥是利差线a≤32米的深度。根据热泥分布的分析，它通过使用11种软件的Surfer，在研究区域的外外化水平上发布了信息。
{"title":"Investigasi Sebaran Lumpur Panas Menggunakan Metode Geolistrik Tahanan Jenis Konfigurasi Dipol-Dipol di Desa Karumenga Sebagai Mitigasi Bencana Alam","authors":"Febrianti Mangensiga, As'ari As'ari, Adey Tanauma","doi":"10.35799/jmuo.9.1.2020.27082","DOIUrl":"https://doi.org/10.35799/jmuo.9.1.2020.27082","url":null,"abstract":"Penelitian ini bertujuan untuk memetakan struktur bawah permukaan di area manifestasi lumpur panas di Desa Karumenga dan menginvestigasi sebaran lumpur panas. Akuisisi data dengan jumlah lintasan 4 yang masing-masing panjang lintasannya yaitu 240 m untuk lintasan 1 dan lintasan 3, 160 m pada lintasan 2, dan 480 m pada lintasan 4. Data lapangan diukur menggunakan resistivity and IP meter MAE-X612-EM menggunakan metode geolistrik tahanan jenis konfigurasi dipol-dipol. Data pengukuran kemudian diolah menggunakan Software Res2dinv . Hasil berupa model tampang lintang 2D bawah permukaan, lumpur panas diidentifikasi dengan nilai tahanan jenis 13,9 Ωm sampai 80 Ωm. Pada lintasan 1 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 32,5 m. Lintasan 2 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 24,5 m. Lintasan 3 lumpur panas terdapat di sepanjang lintasan dengan kedalaman bervariasi antara 0 sampai 33,5 m. Pada lintasan 4 lumpur panas tersebar disepanjang lintasan dengan kedalaman 32 m. Berdasarkan hasil analisis sebaran lumpur panas, diperoleh informasi tingkat kerawanan daerah penelitian dengan menggunakan Software Surfer 11. This study aims to map subsurface structures in the area of hot mud manifestations in Karumenga Village and investigate the distribution of hot mud. Data acquisition with the number of lines 4 with a length of 240 m for line 1 and line 3, 160 m for line 2, and 480 m for line 4. Field data were measured using a resistivity and IP meter MAE-X612-EM using the dipole-dipole configuration resistivity geoelectric method. The measurement. Data is processed using Res2dinv Software. The results are in the form of 2D subsurface models, hot mud identified with resistivity values of 13.9 to 80 Ωm. Line 1, the hot mud is present along the line with depths ranging from 0 to 32.5 m. Line 2, hot mud is appear along the line with depths varying from 0 to 24.5 m. Line 3, hot mud is located along the line with depths varying from 0 to 33.5 m. Line 4, hot mud is spread along the line with a depth of ≤ 32 m. Based on the analysis of the hot mud distribution, it is obtained information on the level of vulnerability of the study area by using Surfer 11 Software.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84176600","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}
Pub Date : 2020-01-09DOI: 10.35799/jmuo.9.1.2020.27081
Jil Astriko Lametige, Hanny F. Sangian, Adey Tanauma, J. Rombang
Penelitian ini bertujuan untuk membuat biodiesel dengan bahan baku minyak kelapa dan minyak sawit dengan mencampurkan metanol sebagai pelarut dan KOH (kalium hidroksida) sebagai katalis. Proses transesterifikasi berarti mengambil molekul trigliserida atau asam lemak kompleks, menetralkan asam lemak bebas dengan menambahkan metil alkohol menjadi metil ester. Tahapan pertama yaitu membuat biodiesel dengan volume keseluruhan campuran bahan baku, pelarut dan katalis yaitu 575 ml dan 550 ml dengan tekanan maksimum 15 bar dan suhu maksimum 150 o C selama satu jam. Tahapan berikutnya menghitung yield yang diperoleh dari biodiesel yang dihasilkan kemudian dilakukan uji Gas Chromatography Mass Spectrometry dan selanjutnya dilakukan uji parameter bahan bakar. Hasil menunjukkan biodiesel dari minyak kelapa memperoleh yield 98,82% lebih besar daripada minyak sawit yang hanya memperoleh yield 92,38% , dan ditemukan komposisi C terbesar pada biodiesel dari minyak kelapa dengan volume keseluruhan campuran bahan 575 ml yaitu C 15 H 30 O 2 dengan luas area 27.10% sedangkan komposisi terbesar untuk biodiesel dengan volume keseluruhan campuran bahan 550 ml adalah C 15 H 30 O 2 dengan luas area 24.04%. Untuk biodiesel dari minyak sawit komposisi C terbesar yang terbentuk pada volume keseluruhan campuran bahan 575 ml yaitu C 19 H 36 O 2 dengan luas area 40.95% dan untuk volume keseluruhan campuran bahan 550 ml komposisi terbesar C 19 H 36 O 2 dengan luas area 40.88%. This study aims to make biodiesel with raw materials of coconut oil and palm oil by mixing methanol as a solvent and KOH (kalium hydroxide) as a catalyst. The process of transesterification means taking triglyceride molecules or complex fatty acids, neutralizing free fatty acids by adding methyl alcohol to methyl esters. The first stage is making biodiesel with an overall volume of a mixture of raw materials, solvents and catalysts of 575 ml and 550 ml with a maximum pressure of 15 bar and a maximum temperature of 150 o C for one hour. The next stage is calculating the yield obtained from the biodiesel produced then the Gas Chromatography Mass Spectrometry test and then to test the fuel parameters. The results show biodiesel from coconut oil yields 98.82% greater than palm oil which only yields 92.38% yield, and found the largest composition of C in biodiesel from coconut oil with a total volume of 575 ml mixture material, namely C 15 H 30 O 2 with an area of 27.10% while the largest composition for biodiesel with an overall volume of a mixture of 550 ml material is C 15 H 30 O 2 with an area of 24.04%. For biodiesel from composition C largest palm oil that is formed in the overall volume of the mixture of 575 ml, namely C 19 H 36 O 2 with an area of 40.95% and for the overall volume of the mixture of 550 ml the largest composition of C 19 H 36 O 2 with an area of 40.88%.
该研究的目的是将棕榈油和棕榈油的原料混合甲醇作为溶剂，并将氢氧化钾作为催化剂。transesteri过程fi给意味着采取甘油三酯分子或复杂的脂肪酸,中和自由脂肪酸加入甲基酒精成为甲酯。第一阶段是用原材料、溶剂和催化剂的总容量为575毫升和550毫升，最大压力为15条，最高温度为1小时150摄氏度。下一阶段是计算从生物柴油中获得的污染物，然后进行质谱学气系测定，然后对燃料参数进行进一步的测试。结果显示生物柴油的椰子油获得收益98,82%大于棕榈油只获得收益92,38%,发现C最大的生物柴油组分混合整个椰子油的体积575 30毫升即15 C H O 2材料和10%的面积27。而与整体体积最大的生物柴油混合材料成分550毫升是C 15 30 H O 2的面积24 . 04%。对于在575毫升的材料混合物中形成的最大的C -柴油化合物是c19 - H - 36 - 2，面积为40.95%，大面积为88.8。这些研究表明，将生物柴油与姜黄油和棕榈油的原料混合作为溶剂和胶质作为催化剂。变性的过程意味着接受分子或对等淀粉过氧化氢ads，消除对乙醇酒精对乙醇的免费脂肪acids的中和。第一阶段是用大量的原始材料、溶剂和550毫升的混合物、15毫升的最大压力和150毫升的最高温度进行生物柴油的生产。接下来的阶段是计算从生物柴油生产中获得的可溶性物质的检验然后再测试燃料组件。results秀生物柴油从椰子油yields 98。82%大只比palm oil哪种yields 92。38%收益,和发现的最大composition of在生物柴油从椰子油与C .物质总量的575 ml mixture的C, namely 15 30 H O 2 with an 27 10%。而《最大的区域为生物柴油composition with an工作服of a mixture of 550毫升的容量是C 15 30 H O 2材料用24 . 04%的一个区域。来自composition C最大的生物柴油的palm oil就是formed in 575工作服mixture之卷》2毫升,namely C 19 36 H O an 40。95%的地区和为mixture工作服卷》《最大550毫升的composition of C 19 36 H O 2用40的区域的88%。
{"title":"Penerapan Metode Transesterifikasi Subkritis Mendekati Isokorik dalam Pembuatan Biodiesel","authors":"Jil Astriko Lametige, Hanny F. Sangian, Adey Tanauma, J. Rombang","doi":"10.35799/jmuo.9.1.2020.27081","DOIUrl":"https://doi.org/10.35799/jmuo.9.1.2020.27081","url":null,"abstract":"Penelitian ini bertujuan untuk membuat biodiesel dengan bahan baku minyak kelapa dan minyak sawit dengan mencampurkan metanol sebagai pelarut dan KOH (kalium hidroksida) sebagai katalis. Proses transesterifikasi berarti mengambil molekul trigliserida atau asam lemak kompleks, menetralkan asam lemak bebas dengan menambahkan metil alkohol menjadi metil ester. Tahapan pertama yaitu membuat biodiesel dengan volume keseluruhan campuran bahan baku, pelarut dan katalis yaitu 575 ml dan 550 ml dengan tekanan maksimum 15 bar dan suhu maksimum 150 o C selama satu jam. Tahapan berikutnya menghitung yield yang diperoleh dari biodiesel yang dihasilkan kemudian dilakukan uji Gas Chromatography Mass Spectrometry dan selanjutnya dilakukan uji parameter bahan bakar. Hasil menunjukkan biodiesel dari minyak kelapa memperoleh yield 98,82% lebih besar daripada minyak sawit yang hanya memperoleh yield 92,38% , dan ditemukan komposisi C terbesar pada biodiesel dari minyak kelapa dengan volume keseluruhan campuran bahan 575 ml yaitu C 15 H 30 O 2 dengan luas area 27.10% sedangkan komposisi terbesar untuk biodiesel dengan volume keseluruhan campuran bahan 550 ml adalah C 15 H 30 O 2 dengan luas area 24.04%. Untuk biodiesel dari minyak sawit komposisi C terbesar yang terbentuk pada volume keseluruhan campuran bahan 575 ml yaitu C 19 H 36 O 2 dengan luas area 40.95% dan untuk volume keseluruhan campuran bahan 550 ml komposisi terbesar C 19 H 36 O 2 dengan luas area 40.88%. This study aims to make biodiesel with raw materials of coconut oil and palm oil by mixing methanol as a solvent and KOH (kalium hydroxide) as a catalyst. The process of transesterification means taking triglyceride molecules or complex fatty acids, neutralizing free fatty acids by adding methyl alcohol to methyl esters. The first stage is making biodiesel with an overall volume of a mixture of raw materials, solvents and catalysts of 575 ml and 550 ml with a maximum pressure of 15 bar and a maximum temperature of 150 o C for one hour. The next stage is calculating the yield obtained from the biodiesel produced then the Gas Chromatography Mass Spectrometry test and then to test the fuel parameters. The results show biodiesel from coconut oil yields 98.82% greater than palm oil which only yields 92.38% yield, and found the largest composition of C in biodiesel from coconut oil with a total volume of 575 ml mixture material, namely C 15 H 30 O 2 with an area of 27.10% while the largest composition for biodiesel with an overall volume of a mixture of 550 ml material is C 15 H 30 O 2 with an area of 24.04%. For biodiesel from composition C largest palm oil that is formed in the overall volume of the mixture of 575 ml, namely C 19 H 36 O 2 with an area of 40.95% and for the overall volume of the mixture of 550 ml the largest composition of C 19 H 36 O 2 with an area of 40.88%.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83708255","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：