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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Saintifika Jurnal Spektra SAINTIFIKA
Era Budi Prayekti
Universitas Negeri Malang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Health Professions Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences

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PENGUKURAN RESISTIVITAS DAN DIELEKTRISITAS TANAH PERKEBUNAN APEL: SEBUAH LANGKAH AWAL DALAM STUDI AGROGEOPHYSICS Zulaikah, Siti; Prayekti, Era Budi; Pramono, Nugroho Adi; Laksono, Yoyok Adisetyo; Munfarikha, Ninik; Hikma, Rizka Amirul; Kurniawan, Husni Cahyadi
Jurnal Spektra Vol 16, No 1 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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Abstract

AbstrakTelah dilakukan pengukuran resistivitas dan dielektrisitas tanah perkebunan Apel di Malang. Pengukuran resistivitas dilakukan dengan metode Geolistrik dan dielektrisitas dengan menggunakan Ground Penetrating Radar (GPR). Metode Geolistrik dilakukan dengan konfigurasi dipole-dipole dengan teknik sounding –mapping pada tiga lintasan area perkebunan seluas 1800 m2 dan satu lintasan pada area lapangan di sebelah perkebunan. Sementara itu, metode GPR diterapkan pada dua pohon apel untuk mengidentifikasi sistem perakaran apel. Pengukuran resistivitas dilakukan di perkebunan Apel desa Bengkaras Pujon, Malang sedangkan GPR dilakukan di perkebunan Poncokusumo Malang. Dari hasil pengolahan data resistivitas dengan menggunakan software Res2dinv diperoleh hasil nilai resistivitas dari keempat lintasan adalah: lintasan pertama 4,83 – 22094 Wm, lintasan kedua 6,69 – 4947 Wm, lintasan ketiga 14,1 – 178 Wm dan lintasan keempat 4,50 – 20025 Wm. Dari data tersebut secara keseluruhan belum dapat dibedakan dengan jelas nilai resistivitas antara daerah perkebunan dengan bukan perkebunan di lingkungan penelitian. Sementara itu dari pengukuran GPR diperoleh jangkauan pengukuran mencapai kedalaman 2,18 meter dan jangkauan kedalaman akar apel 1.9 meter. Rentang nilai konstanta dielektrik yang diperoleh 0,1 – 8,8 F/m. Nilai konstanta dielektrik akar 4,9 F/m. Kata kunci: Resistivitas, dielektrisitas, tanah, perkebunan apel AbstractThe resistivity and dielectric properties of Apple’s soil plantation area in Malang have been measured.  Resistivity measurement was done using geo-electrical methods and dielectric properties was measured using ground penetrating radar (GPR). Configuration of geo-electrical methods in this research is dipole-dipole and sounding –mapping technique. We have three line measurement of geo-electrical measurement for an area 1800 m2 and one line on the football yard beside of the apple plantation in Bengkaras village Pujon, Malang. Meanwhile, GPR methods was conducted on two apple trees to identify apple root system in apple plantation in Poncokusumo village Malang. The result of this research based on data analysis using Res2dinv software shows the resistivity value of four line, that are 4,83 – 22094 Wm for line number one, 6,69 – 4947 Wm  for second line, 14,1 – 178 Wm for line number three and 4,50 – 20025 Wm for line number four. From the data, generally, we cannot distinguish clearly of resistivity value of apple plantation and football yard. On the other hand, GPR measurement we can describe the maximum depth of penetrate is about 2,18 meter and the depth of root system is about 1.9 meter. The range of dielectric value is between 0,1 to 8.8 F/m and the dielectric constant of root is about 4,9 F/m. Keywords: Resistivity, dielectric, soil, apple plantation
COMBINATION OF COPRECIPITATION AND SONOCHEMICAL METHODS IN SYNTHESIZING SPINEL HAUSMANNITE NANOMATERIAL Hidayat, Nurul; Taufiq, Ahmad; Sunaryono, Sunaryono; Hidayat, Samsul; Heriyanto, Heriyanto; Prayekti, Era Budi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n1.p1-9

Abstract

As it has been widely known that the spectacular characteristics of nanomaterials are strongly dependent on their particle size, crystal structure, and molecular arrangement. The fine structure formation of nanomaterials is inevitable in an attempt of optimizing their promising applications in various fields. One of the notable nanomaterials up to now is hausmannite or Mn3O4. This paper presents a combination of coprecipitation and sonochemical routes in a concurrent way to produce spinel-structured hausmannite nanomaterials. The pH was varied during the synthesis at values of 9, 10, 11, 11.5, and 12. The crystal structure properties were evaluated by X-ray diffractometry (XRD) with the diffraction angle range of 15° - 80°. The functional groups were investigated by Fourier transform infrared (FTIR) spectrometry having wavenumber from 400 to 4000 cm-1. In this study, pH 10 was found to be the best synthesis parameter in producing Mn3O4. Both XRD and FTIR data analyses have agreed on the formation of spinel hausmannite nanomaterials.
Combination of Coprecipitation and Sonochemical Methods in Synthesizing Spinel Hausmannite Nanomaterial Hidayat, Nurul; Taufiq, Ahmad; Sunaryono, Sunaryono; Hidayat, Samsul; Heriyanto, Heriyanto; Prayekti, Era Budi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n1.p1-9

Abstract

As it has been widely known that the spectacular characteristics of nanomaterials are strongly dependent on their particle size, crystal structure, and molecular arrangement. The fine structure formation of nanomaterials is inevitable in an attempt of optimizing their promising applications in various fields. One of the notable nanomaterials up to now is hausmannite or Mn3O4. This paper presents a combination of coprecipitation and sonochemical routes in a concurrent way to produce spinel-structured hausmannite nanomaterials. The pH was varied during the synthesis at values of 9, 10, 11, 11.5, and 12. The crystal structure properties were evaluated by X-ray diffractometry (XRD) with the diffraction angle range of 15° - 80°. The functional groups were investigated by Fourier transform infrared (FTIR) spectrometry having wavenumber from 400 to 4000 cm-1. In this study, pH 10 was found to be the best synthesis parameter in producing Mn3O4. Both XRD and FTIR data analyses have agreed on the formation of spinel hausmannite nanomaterials.
Pengujian Tingkat Kelembaban Lembaran Kertas Setelah Melalui Tahap Pengeringan Era Budi Prayekti; Anggun Amalia; Iin Afriyanti; Tresno Santoso
Saintifika Vol 18 No 1 (2016)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.701 KB)

Abstract

Proses pembuatan kertas terbagi menjadi dua bagian utama yaitu Stock Preparation dan Paper Machine. Pada bagian Paper Machine terjadi berbagai proses fisika yang akan mempengaruhi kualitas kertas hasil produksi. Salah satu proses pada paper machine yang berkaitan dengan temperatur adalah tahap pengeringan (dryer section). Pada tahap pengering lembaran kertas akan mendapatkan perlakuan perbedaan temperatur. Proses pengeringan terjadi dengan cara menaikkan temperatur secara bertahap sampai mencapai temperatur maksimal kemudian diikuti kembali dengan penurunan temperatur. Temperatur awal pada tahap pengering sebesar 73oC, selanjutnya dinaikkan sampai 109oC, kemudian diturunkan lagi menjadi 82oC. Temperatur tahap pengeringan dapat mempengaruhi kualitas kertas. Proses pada tahap pengeringan dapat mempengaruhi ikatan antar serat, yakni ikatan hidrogen yang menyebabkan kekuatan jaringan meningkat. Parameter pengujian kualitas kertas yang berkaitan dengan temperatur pada tahap pengeringan adalah kelembaban kertas. Lembaran kertas yang melewati bagian pengering akan memiliki kelembaban antara 5% - 6%.
Combination of Coprecipitation and Sonochemical Methods in Synthesizing Spinel Hausmannite Nanomaterial Nurul Hidayat; Ahmad Taufiq; Sunaryono Sunaryono; Samsul Hidayat; Heriyanto Heriyanto; Era Budi Prayekti
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 8 No. 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n1.p1-9

Abstract

As it has been widely known that the spectacular characteristics of nanomaterials are strongly dependent on their particle size, crystal structure, and molecular arrangement. The fine structure formation of nanomaterials is inevitable in an attempt of optimizing their promising applications in various fields. One of the notable nanomaterials up to now is hausmannite or Mn3O4. This paper presents a combination of coprecipitation and sonochemical routes in a concurrent way to produce spinel-structured hausmannite nanomaterials. The pH was varied during the synthesis at values of 9, 10, 11, 11.5, and 12. The crystal structure properties were evaluated by X-ray diffractometry (XRD) with the diffraction angle range of 15° - 80°. The functional groups were investigated by Fourier transform infrared (FTIR) spectrometry having wavenumber from 400 to 4000 cm-1. In this study, pH 10 was found to be the best synthesis parameter in producing Mn3O4. Both XRD and FTIR data analyses have agreed on the formation of spinel hausmannite nanomaterials.
Pengujian Tingkat Kelembaban Lembaran Kertas Setelah Melalui Tahap Pengeringan Era Budi Prayekti; Anggun Amalia; Iin Afriyanti; Tresno Santoso
saintifika Vol 18 No 1 (2016)
Publisher : FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.701 KB)

Abstract

Proses pembuatan kertas terbagi menjadi dua bagian utama yaitu Stock Preparation dan Paper Machine. Pada bagian Paper Machine terjadi berbagai proses fisika yang akan mempengaruhi kualitas kertas hasil produksi. Salah satu proses pada paper machine yang berkaitan dengan temperatur adalah tahap pengeringan (dryer section). Pada tahap pengering lembaran kertas akan mendapatkan perlakuan perbedaan temperatur. Proses pengeringan terjadi dengan cara menaikkan temperatur secara bertahap sampai mencapai temperatur maksimal kemudian diikuti kembali dengan penurunan temperatur. Temperatur awal pada tahap pengering sebesar 73oC, selanjutnya dinaikkan sampai 109oC, kemudian diturunkan lagi menjadi 82oC. Temperatur tahap pengeringan dapat mempengaruhi kualitas kertas. Proses pada tahap pengeringan dapat mempengaruhi ikatan antar serat, yakni ikatan hidrogen yang menyebabkan kekuatan jaringan meningkat. Parameter pengujian kualitas kertas yang berkaitan dengan temperatur pada tahap pengeringan adalah kelembaban kertas. Lembaran kertas yang melewati bagian pengering akan memiliki kelembaban antara 5% - 6%.
Co-Authors Ahmad Taufiq Anggun Amalia Anggun Amalia Heriyanto Heriyanto Husni Cahyadi Kurniawan Husni Cahyadi Kurniawan, Husni Cahyadi Iin Afriyanti Iin Afriyanti Ninik Munfarikha, Ninik Nugroho Adi Pramono, Nugroho Adi Nurul Hidayat Nurul Hidayat Rizka Amirul Hikma Rizka Amirul Hikma, Rizka Amirul Samsul Hidayat Samsul Hidayat Siti Zulaikah Sunaryono Sunaryono Sunaryono, Sunaryono Tresno Santoso Tresno Santoso Yoyok Adisetyo Laksono Yoyok Adisetyo Laksono, Yoyok Adisetyo Yundari, Yundari