Jurnal Jejaring Matematika dan Sains最新文献

Karakterisasi Pasir Pantai Citra Kabupaten Sukamara Menggunakan XRF dan XRD

Jurnal Jejaring Matematika dan Sains Pub Date : 2021-06-22 DOI: 10.36873/jjms.2021.v3.i1.503

Budi Hariyanto, Lady M. Panggabean, Luqman Hakim

引用次数: 0

Etnoekologi Masyarakat di Kawasan Hutan Jati Kabupaten Batang pada Pertanaman Tumpangsari

Jurnal Jejaring Matematika dan Sains Pub Date : 2021-06-22 DOI: 10.36873/jjms.2021.v3.i1.501

Eva Cahya Pratiti, Eny Hartadiyati Wasikin Haryanti, Reni Rakhmawati

{"title":"Etnoekologi Masyarakat di Kawasan Hutan Jati Kabupaten Batang pada Pertanaman Tumpangsari","authors":"Eva Cahya Pratiti, Eny Hartadiyati Wasikin Haryanti, Reni Rakhmawati","doi":"10.36873/jjms.2021.v3.i1.501","DOIUrl":"https://doi.org/10.36873/jjms.2021.v3.i1.501","url":null,"abstract":"Pengetahuan lokal secara substansial merupakan norma yang berlaku dalam suatu masyarakat yang diyakini kebenarannya dan menjadi acuan dalam bertindak dan berperilaku sehari-hari. Sebagian masyarakat di kawasan hutan jati di wilayah Desa Pecalungan Kabupaten Batang, bermata pencaharian sebagai petani dengan memanfaatkan area hutan Jati. Dalam mengelola lahan para pekerja hutan berpedoman sesuai aturan yang berlaku secara turun-temurun, pedoman pengelolaan lahan dengan teknik tersebut merupakan pengetahuan lokal yang perlu dikaji melalui studi etnoekologi. Penelitian ini bertujuan menggambarkan interaksi pekerja hutan dengan lingkungan hutan jati terkait pertanaman tumpangsari yaitu cabe rawit, kacang panjang dan jagung dengan pohon jati. Metode yang digunakan dalam penelitian ini kualitatif deskriptif. Pengumpulan data menggunakan metode wawancara mendalam kepada tiga informan (pekerja hutan) menggunakan pedoman wawancara. Setiap kegiatan wawancara dilakukan recording. Pengumpulan data juga menggunakan metode observasi dan setiap kegiatan didokumentasikan dalam bentuk foto. Hasil penelitian menunjukkan bahwa pekerja hutan memiliki pengetahuan tentang pertanaman tumpangsari dan menerapkan dalam kehidupannya yaitu pengetahuan pemilihan jenis tanaman yang sesuai dengan tanaman jati; pengetahuan waktu dan karakteristik tanah yang sesuai dengan tanaman; pengetahuan pembuatan pupuk alami; pengetahuan pola tanam; pengetahuan pemeliharaan tanaman; pengetahuan masa panen; dan tradisi pekerja hutan. Semua kegiatan budidaya yang dilakukan para pekerja hutan berdasarkan pemahaman untuk kelestarian hutan jati.","PeriodicalId":168223,"journal":{"name":"Jurnal Jejaring Matematika dan Sains","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132910202","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

Perbandingan Plastik Dari Material-Material Bioplastik

Jurnal Jejaring Matematika dan Sains Pub Date : 2021-06-22 DOI: 10.36873/jjms.2021.v3.i1.505

L. Rosmainar, Dominikus Niholan Tukan, Mitha Deviyanti

{"title":"Perbandingan Plastik Dari Material-Material Bioplastik","authors":"L. Rosmainar, Dominikus Niholan Tukan, Mitha Deviyanti","doi":"10.36873/jjms.2021.v3.i1.505","DOIUrl":"https://doi.org/10.36873/jjms.2021.v3.i1.505","url":null,"abstract":"Plastik merupakan suatu polimer yang mempunyai sifat unik dan merupakan benda yang luar biasa. Polimer merupakan bahan yang terdiri dari molekul-molekul yang disebut dengan monomer dengan jenis homopolimer. Polimer biasa dikenal dalam kehidupan sehari-hari seperti selulosa, protein, karet dan bahan alam lainnya. Peningkatan penggunaan plastik merupakan dampak dari berkembangnya dunia perindustrian, teknologi dan meningkatnya jumlah penduduk dunia. Di Indonesia, kebutuhan plastik terus mengalami peningkatan dengan rata-rata 200 ton per tahun. Pada tahun 2002 telah tercatat sekitar 1,9 juta ton sampah plastik, dan ditahun 2011 jumlah sampah plastik meningkat menjadi 2,6 juta ton pertahun. Berdasarkan asumsi Kementrian Lingkungan Hidup (KLH), setiap hari penduduk Indonesia dapat mengahsilkan 0,8 kg sampah per orang dan jika ditotal maka sebanyak 189 ribu ton sampah per hari. Sampah yang dihasilkan sebanyak 15% berupa sampah plastik atau sekitar 28,4 ribu ton per hari. Pada awalnya polimer alam digunakan sebagai bahan pembuatan perkakas dan pembuatan senjata. Monomer dalam pembentukan polimer merupakan molekul yang memiliki ikatan rangkap atau yang memiliki gugus fungsi tertentu. Polimer digolongkan atas polimer alam dan polimer sintetik. Polimer alam seperti selulosa, pati, kitin, kitosan, gelatin, dekstran, alginat, pektin, gum guar dan karet digunakan dalam pembuatan nanokomposit. Polimer alam menunjukkan sifat seperti kemurnian, kristalinitas, solditas tarik, meningkatkan elastisitas dan memilikki permukaan yang luas. Kesimpulannya adalah daya tarik pada bioplastik memiliki kekuatan yang sama namun jika ditambahkan dengan material-material yang lain maka daya hantar akan semakin kuat dan semakin baik.","PeriodicalId":168223,"journal":{"name":"Jurnal Jejaring Matematika dan Sains","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127922010","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

Pemurnian Asap Cair Hasil Torefaksi Cangkang Sawit dengan Cara Destilasi dan Filtrasi dengan Arang Aktif 用活性炭净化棕榈壳破裂的液体烟

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.407

Karelius Karelius, L. Rosmainar, Angeline Novia Toemon, M. Dirgantara

{"title":"Pemurnian Asap Cair Hasil Torefaksi Cangkang Sawit dengan Cara Destilasi dan Filtrasi dengan Arang Aktif","authors":"Karelius Karelius, L. Rosmainar, Angeline Novia Toemon, M. Dirgantara","doi":"10.36873/jjms.2020.v2.i2.407","DOIUrl":"https://doi.org/10.36873/jjms.2020.v2.i2.407","url":null,"abstract":"The liquid smoke produced from the torrefaction process of oil palm shells has the potential to be used as an antiseptic base for hand sanitizer and disinfectant products. It is due to its high phenol and acetic acid content. Apart from phenol and acetic acid, there are many other compounds that must be separated in the hope of obtaining liquid smoke with the main components of acetic acid and phenol, which function as antibacterial agents. This research begins with the production of liquid smoke through a torrefaction process. The liquid smoke obtained is distilled at 150 oC and followed by adsorption with activated charcoal for the purification process. The pH value and acetic acid content in the purified liquid smoke were determined and analyzed using GC-MS to determine the chemical compounds. The pH value has decreased after the refining process by distillation, and activated charcoal is inversely proportional to the increase in acetic acid levels after purification. Based on GC-MS analysis results, it can be seen that the levels of acetic acid, phenol, propanoic acid, and 2-propanone increased after distillation. The loss of 1,2-Benzenediol and 2-Furancarboxaldechde compounds shows that distillation of liquid smoke at 150oC is effective for separating the heavy fraction of liquid smoke. Furthermore, the distilled liquid smoke is filtered using activated charcoal. The GC-MS analysis results showed that the filtration results with activated charcoal could increase acetic acid and propanoic acid levels in liquid smoke.","PeriodicalId":168223,"journal":{"name":"Jurnal Jejaring Matematika dan Sains","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124837508","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

Potensi Nanoselulosa untuk Agen Slow Release Bahan Alam: Review

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.406

Salsabila Aqila Putri, Ratih Febrianti, S. Sunardi

引用次数: 0

Bryophyta di Sekitar Kawasan Bandar Udara Internasional Syamsudin Noor Kalimantan Selatan

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.402

Yuninda Riyana, Sasi Gendro Sari, Gunawan Gunawan

{"title":"Bryophyta di Sekitar Kawasan Bandar Udara Internasional Syamsudin Noor Kalimantan Selatan","authors":"Yuninda Riyana, Sasi Gendro Sari, Gunawan Gunawan","doi":"10.36873/jjms.2020.v2.i2.402","DOIUrl":"https://doi.org/10.36873/jjms.2020.v2.i2.402","url":null,"abstract":"The diversity of mosses around the Syamsudin Noor international airport was never reported. This study aimed to reveal the variety of moss around the Syamsudin Noor International Airport area. This research uses the purposive sampling method. Measurement of environmental parameters includes air temperature, light intensity, humidity, and soil pH. Moss identification refers to the book A Handbook of Malesian Mosses volume 1 Sphagnales to Dicranales and A Handbook of Malesian Mosses volume 2 Leucobryaceae to Buxbaumiaceae. The moss morphological characters observed included the leaves, stems, and rhizoids using a stereomicroscope. The results showed that in Syamsudin Noor International Airport's vicinity, there are as many as five types of moss consisting: Pseudoracelopus acaulis, Hyophila apiculata Homalothecium lutescens, Ectropothecium falciforme, Fissidens atroviridis. The most dominant type of moss is Pseudoracelopus acaulis. The range of environmental parameter values ??is air temperature 28-34oC, light intensity 20-35 lux, humidity 74-84%, and soil pH 7. This study's results are preliminary data to determine the environmental change around Syamsudin Noor International Airport.","PeriodicalId":168223,"journal":{"name":"Jurnal Jejaring Matematika dan Sains","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130899124","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

Sintesis dan Kararkterisasi Modifikasi Mikropartikel Magnetit (Fe3O4) Dalam Pemanfaatan Karat dengan Ekstrak Daun Ilalang (Imperata Cylindrica L) 采用锈蚀微粒子(2 - 3 - 4)的合成和碳化化。

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.405

Annisaa Siti Zulaicha, Iwan Syahjoko Saputra, I. Sari, Dicky Annas

{"title":"Sintesis dan Kararkterisasi Modifikasi Mikropartikel Magnetit (Fe3O4) Dalam Pemanfaatan Karat dengan Ekstrak Daun Ilalang (Imperata Cylindrica L)","authors":"Annisaa Siti Zulaicha, Iwan Syahjoko Saputra, I. Sari, Dicky Annas","doi":"10.36873/jjms.2020.v2.i2.405","DOIUrl":"https://doi.org/10.36873/jjms.2020.v2.i2.405","url":null,"abstract":"The synthesis of magnetite (Fe3O4) microparticles has been successfully carried out using rust and leaf extract of grass (Imperata cylindrica L). The purpose of this research is the synthesis and characterization of Fe3O4 microparticles using the Green Synthesis method. The UV-Vis results showed that the absorption peak was at a wavelength of 273 nm with an absorbance value of 0.75. FTIR analysis shows the shift of the peak at wave number 3356 cm-1 to 3290 cm-1 and the appearance of a new peak at wave number 500 cm-1 which is characteristic of the Fe-O-Fe functional group and indicates the formation of Fe3O4 microparticles. XRD results showed six specific peaks, which were crystallinity of Fe3O4 microparticles at position 2 theta 30.40 °, 35.70 °, 43.30 °, 53.80 °, 57.40 °, and 63.00 °. PSA analysis showed that the mean particle size was > 100 nm, and the PZC results showed a zeta potential of 20 mV. SEM results showed the morphology of Fe3O4 microparticles with 1000x magnification, and EDS analysis results showed Fe and O's elemental composition.","PeriodicalId":168223,"journal":{"name":"Jurnal Jejaring Matematika dan Sains","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125429264","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

Pemodelan Protein dengan Homology Modeling menggunakan SWISS-MODEL Pemodelan蛋白dengan同源性建模

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.408

Noer Komari, Samsul Hadi, Eko Suhartono

引用次数: 7

Dinamika Perilaku Orangutan Kalimantan (Pongo pygmaeus wurmbii) di Taman Nasional Sebangau Kalimantan Tengah

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.404

Adventus Panda, Rosenda Chandra Kasih

引用次数: 0

Identifikasi Nematoda Tanah Pada Perkebunan Sawi (Brassica juncea L.) di Kelurahan Landasan Ulin Utara, Banjarbaru, Kalimantan Selatan

Jurnal Jejaring Matematika dan Sains Pub Date : 2020-12-30 DOI: 10.36873/jjms.2020.v2.i2.403

Yusinta Oktaviani, A. Gafur

引用次数: 0