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All Journal Microbiology Indonesia Seminar Nasional Teknik Kimia Kejuangan Jurnal Zeolit Indonesia Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Neo Teknika: Jurnal Ilmiah Teknologi Journal of Data Science and Its Applications Jurnal SUBLIMAPSI CENDEKIA: Jurnal Ilmiah Pendidikan Aceh International Journal of Science and Technology Jurnal Kendali Akuntansi Metalurgi
Widi Astuti
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

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Influence of indigenous mixotrophic bacteria on pyrite surface chemistry: Implications for bioflotation Edy Sanwani; Nuslia Bayangkara Lamandhi; Halimatul Husni; Siti Khodijah Chaerun; Widi Astuti; Fika Rofiek Mufakhir
Microbiology Indonesia Vol. 14 No. 1 (2020): March 2020
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4941.336 KB) | DOI: 10.5454/mi.14.1.1

Abstract

Given the low-cost and eco-friendly method, biotechnology has been widely utilized in industries as an alternative for physical and chemical processes, including in the biomining process (e.g., bioflotation and biobeneficiation). However, the use of biochemical reagent, which is selective for certain minerals, has not been well studied. This research was aimed to investigate the potential use of biosurfactant-producing mixotrophic bacteria as an alternative to chemical reagents during bioflotation and biobeneficiation process. Thirteen bacterial strains were investigated for their ability to produce biosurfactants and their effects on the surface properties of pyrite minerals. Bacteria-pyrite interaction experimental results showed that pyrite surface properties became more hydrophilic in the experimental systems inoculated with bacteria adapted with pyrite for 48 h than that without bacterial adaptation to pyrite, which was evidenced by the decrease in the contact angle of pyrite minerals by up to 50%. This evidence was also confirmed by the highest emulsifying index value (51.6%) attained during the bacteria-pyrite interaction. Hence, these bacteria can potentially be applied to selective flotation as pyrite depressants.
Inventarisasi Pemutakhiran Data Jaringan Perpipaan Berbasis Gis Di Kelurahan Sukasari Dan Kelurahan Babakan Kecamatan Tangerang Kota Tangerang Widi Astuti; Sukaryo Sukaryo; Baswindro Baswindro; January Jefry Prasetya
Neo Teknika Vol 9, No 1 (2023): Jurnal Neoteknika Volume 9 No 1 Juni 2023
Publisher : Universitas Pandanaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37760/neoteknika.v9i1.2053

Abstract

Limbah yang dihasilkan oleh masyarakat maupun industri semakin meningkat seiring dengan kegiatan yang dilakukan. Sistem penyaluran air limbah dan instalasi pengolahan air limbah domestik di perkotaan sangat dibutuhkan dalam rangka pelayanan sanitasi untuk menjaga kualitas lingkungan dari pencemaran dan kerusakan lingkunga.. Kota Tangerang sudah memiliki sistem Kolam Oksidasi yang terdapat di Perumnas Karawaci I. Sistem ini melayani 7.932 sambungan rumah atau 30.617 jiwa penduduk (1,94% dari jumlah penduduk Kota Tangerang). Tujuan dari penelitian ini adalah untuk mengupdate data penggunaan jaringan perpipaan dan mengupdate peta jaringan air limbah. Data survey didapatkan dengan plotingg Global Positioning System (GPS) dan pengisian kuesioner yang disediakan. GPS. Plotingg GPS di lakukan untuk menentukan lokasi dan merekam jejak (track). Dari hasil tersebut kemudian di lakukan isian pada form kuisioner, dan di input ke dalam lembar kerja (Work Sheet) dengan menggunakan perangkat lunak microsoft excel. Hasil survey dilapangan diperoleh jumlah sambungan rumah yang terpasang berjumlah 2.494 unit dengan asumsi dimana satu sambungan rumah dikalikan 5 jiwa, maka jumlah penduduk berjumlah 12.470 jiwa atau dapat dikatak bahwa Kelurahan Babakan baru terlayani sekitar 15% dan Kelurahan Sukasari 43%. Jumlah panjang jaringan perpipaan yang terhubung ke Kelurahan Babakan dan Kelurahan Sukasari berjumlah 25.220,71 Meter berdasarkan hasil analisa GIS. Kata kunci :air limbah domestik, jamban
Metode Outdoor Study Dalam Pembelajaran Ilmu Pengetahuan Alam (IPA) Terhadap Motivasi Belajar Siswa Kelas IV MIN 2 Pandeglang widi astuti; anggi solihah; agus hidayatullah
CENDEKIA: JURNAL ILMIAH PENDIDIKAN Vol 11 No 2 (2023): CENDEKIA: Jurnal Ilmiah Pendidikan
Publisher : STKIP Paris Barantai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33659/cip.v11i2.276

Abstract

Abstract This research is motivated by the low learning motivation of class IV students at MIN 2 Pandeglang in science subjects, due to the lack of interest of students in the environment. The formulation of the problem in this study is how effective the outdoor study method is in motivating learning for class IV students of Pandeglang MIN 2 in science learning. This study aims to determine and analyze the effectiveness of the outdoor study method in motivating learning for fourth grade students at Min 2 Pandeglang. This type of research uses the interview method. The research population was the teachers of class IV MIN 2 Pandeglang. The results of this interview tell us that the outdoor study method has proven effective on the learning motivation of fourth grade students at MIN 2 Pandeglang by obtaining an average daily test score of 65 and obtaining an average PTS score of 80. So it can be concluded that the outdoor study method can increase student learning motivation class IV min 2 Pandeglang. Keywords: outdoor study method, learning motivation
Co-Authors Achmad Sofi Adil Jamali Adiwijaya Agus Hidayatullah Agustien Zulaidah Agustin, Niyar Candra Alvianda Ricky Lukman anggi solihah Anief Rufiyanto Aprimal Aprimal Apriyanti, Eny Ardyanto Wijaya Ayu Septriana Azhar Azhar Baswindro Baswindro Danu Bratakusuma Dinda Tri Novira Edy Sanwani Eko Wahyuni Fajar Nurjaman Fika Rofiek Mufakhir Ghina Khoerunnisa Halimatul Husni Hendrik Setiawan Himawan Tri Bayu Murti Petrus Imam Prasetyo January Jefry Prasetya Jondri Jondri Kasman Kasman Laksono Trisnantoro Lukman Nulhakim Luluk Siti Zulaechah Monna Rozana Muhammad Amin Nuslia Bayangkara Lamandhi Rini Julistia Riska Chairunisa Siska Siska SITI KHODIJAH CHAERUN Stefanus Lian Kristian Sukaryo Sukaryo Wiratni Wiratni Yustika Kusumawardani Yustika Kusumawardani Yustika Kusumawardani