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All Journal Jurnal Ilmu Dasar POSITRON Jurnal Sains Materi Indonesia SEMIRATA 2015 Jurnal Spektra JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Spektra: Jurnal Fisika dan Aplikasinya JURNAL METEOROLOGI DAN GEOFISIKA Sarwahita : Jurnal Pengabdian Kepada Masyarakat Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Teknologika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Makara Journal of Technology Wahana Fisika : Jurnal Fisika dan Terapannya
Iwan Sugihartono
Universitas Negeri Jakarta
Aerospace Engineering Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Journal : Spektra: Jurnal Fisika dan Aplikasinya

 1 
ANALISIS KOROSI PADA LAPISAN TIPIS KOMPOSIT NIKEL-NITRIDA HASIL ELEKTRODEPOSISI Esmar Budi; Bagus Ksatriotomo; Alief Restu; Muarief Muarief; Ade Lina Permatasari; Iwan Sugihartono; Agus Setyo Budi
Spektra: Jurnal Fisika dan Aplikasinya Vol 16 No 1 (2015): SPEKTRA, Volume 16 Nomor 1, Juni 2015
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (658.375 KB)

Abstract

Abstrak Telah dilakukan kajian pembentukan lapisan tipis komposit nikel-nitrida menggunakan kaidah elektrodeposisi menggunakan bahan dari campuran 0.38 M Ni2SO4.6H2O, 0.17 M NiCl2.6H2O dan 0.49 M H3BO3 dan ditambahkan partikel nitrida serbuk TiN dan AlN. Proses elektrodeposisi dilakukan dengan perlakuan variasi arus 2, 3 dan 4 mA serta variasi kosentrasi partikel nitrida 4 , 6 dan 8 gr/lit. Analisis korosi lapisan komposit dilakukan dengan merendam sampel pada larutan asam HCl 3.5% selama 3 jam. Nilai korosi ditentukan dari penimbangan, menggunakan neraca analitis, massa sampel sebelum dan sesudah proses perendaman dalam larutan asam. Hasil pengujian menunjukan bahwa sampel hasil elektrodeposisi pada arus 2 mA dan sampel hasil elektrodeposisi pada konsentrasi nitrida 8 gr/lit mengalami tingkat korosi yang paling kecil. Kata kunci: Lapisan komposit nikel-nitrida, elektrodeposisi, arus, konsentrasi nitrida, korosi.
OPTICAL PROPERTIES ANALYSES OF CHLOROPHYLL OF LEAF EXTRACT BY UV-VIS SPECTROMETER AS PRE-STUDY OF DYE SENSITIZER Dona Dianisya; Amalia Dini Silmina; Novan Purwanto; Isnaeni Isnaeni; Iwan Sugihartono
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 2 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 2, August 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.368 KB) | DOI: 10.21009/SPEKTRA.032.04

Abstract

ABSTRAK Telah dilakukan studi ekstraksi awal klorofil dari 3 jenis daun yaitu daun bayam (Amarantus), daun pepaya (Carica papaya), dan daun jarak (Ricinus communis). Ekstraksi dilakukan dengan teknik penghancuran menggunakan blender. Pelarut yang digunakan adalah isopropanol, asam asetat, dan DI water. Hasil penyaringan ekstrak daun diperoleh larutan sebayak 75 ml untuk setiap larutan ekstrak klorofil. Uji Ultrasonic Visible memberikan konfirmasi adanya penyerapan di rentang cahaya ultraviolet dan cahaya tampak. Sementara itu, serapan klorofil teramati di rentang cahaya tampak. Apabila dibandingkan serapan UV dan cahaya tampak, pada larutan ekstrak masih mengandung banyak gugus asam dibandingkan klorofil yang di ekstrak. Kata-kata kunci: daun bayam, daun pepaya, daun jarak, absorbansi, klorofil ABSTRACT We studied for chlorophyll extract from 3 leaf types that are spinach leaf (Amarantus), papaya leaf (Carica papaya), and castor leaf (Ricinus communis). The extraction is done by using a blender. The solvents used are isopropanol, acetic acid, and DI water. The result of leaf extract was obtained 75 ml solution for each solution of chlorophyll extract. The Visible Ultrasonic Test confirms absorption in the range of ultraviolet light and visible light. Meanwhile, chlorophyll uptake is observed in the visible light spectrum. When compared to UV absorption and visible light, in the extract solution still contains a lot of acid groups than the chlorophyll extracted. Keywords: spinach leaf, papaya leaf, Castor leaf, absorbance, chlorophyll.
HEATING AND QUENCHING PROCEDURE ON THE MAKING OF TRADITIONAL BLACKSMITH STEEL WITH HIGH QUALITY Artoto Arkundato; Misto Misto; Hadi Paramu; Gaguk Jatisukamto; Iwan Sugihartono
Spektra: Jurnal Fisika dan Aplikasinya Vol 4 No 1 (2019): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 4 Issue 1, April 2019
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.01 KB) | DOI: 10.21009/SPEKTRA.041.05

Abstract

Blacksmith is a people's business that has been going on for a long time in Indonesia. Based on the experience that has been obtained from time to time and hereditary, the blacksmith industry has been done by the community to meet the needs of agricultural and household utensils. However, observe to this people's business, now it decreases with various causal factors, such as the ease of imported goods on the market with lower prices. Many creative efforts need to be carried out so that these people's businesses remain and increasingly develop, among others by improving the quality of the process of a blacksmith so that their products are quite competitive. This article describes the results of the research in the laboratory regarding the physical processes of heating and quenching under blacksmith, which the results have been applied to community service activities at the Suger Kidul villages in Jember Regency. The study aimed to find the most appropriate procedure for steel tool manufacturing processes so that the blacksmith products have high quality as high hardness. The physical process for blacksmith process is heating and quenching. This study analyzes the proper heat (temperature), proper processing time, and proper media for heating and quenching to produce good harness quality of the product.
Co-Authors Abdullah Mu’adz Muflih Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Jalil Ade Lina Permata Ade Lina Permatasari Ade Lina Permatasari, Ade Lina Adhyatma Alamsyah Aga Noputro Sekartaji Agus Setyo Budi Ali Sabeni Alief Restu Alief Restu Alief Restu, Alief Alifia Nurul Hasanah Amalia Dini Silmina Amanda Larasati Andi Gunawan Anggie Anastasya Anggoro Budi Susila Anisah Fauziyyah Annisa Nurul Aini Artoto Arkundato Assita Wahyu Andiani Bagus Ksatriotomo Bagus Ksatriotomo, Bagus Bambang Heru I Bambang Heru I, Bambang Heru Bambang Heru Iswanto Bambang Soegijono Bambang Soegijono Bayyinah Bernadus Herdi Sirenden Budhy Kurniawan Cuk Imawan Desy Mekarsari Devi Anggraheni Diajeng Ramadhan Dona Dianisya Dwi Septiani Eko Andri Eko Andri Endah Purwanti Erfan Handoko Erfan Handoko Erfan Handoko Erfan Handoko, Erfan Ernik D. Safitri Esmar Budi esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Fathiyyah Husna Sulaiman Fauzia, Vivi Febriana Yunhas Putri Febyana Nur Aliffah Febyana Nur Aliffah Fera Kurniadewi Ferdiansyah Faturachman Achmad Ferdy Alfian Indra Prasetya Fitri Ayu Sundari Fitri Sakinah Fitriana Faizatu Zahroh Fitrianto Nugroho Fitrianto Nugroho, Fitrianto Gaguk Jatisukamto Gita Putri Isyafiani Grace Natalia Grace Natalia Hadi Nasbey Hadi Paramu I Made Astra I Made Astra I Made Astra I Made Astra Iman Safari Immanuel Bobby Immanuella Senja Dwi Febriani Indah Langitasari Indra Permana Indri Sari Utami Inggrid Ayu Putr Irzan Zakir Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Jack Luhukay Jack Luhukay Jack Roland Luhukay Jackqluine Aprilia Victoria Jaja Jamaludin Kuriah, Yayah Lanny Catherine Lara Permata Sari, Lara Permata Leli Kusumawati Lory Inggi Lutfi Rohman M Ikrar Ramadhan M. Hikam M. Hikam M. Iqrar Ramadhan, M. Iqrar Mangasi Alion Marpaung Marliana Candra Kartika Mas Ayu Yuliana Mashaler Suradam Mashaler Suradam Mashaler Suradam Misto Misto Muarief Muarief Muarief Muarief Muarief Muarief Muarief Muarief, Muarief Mudammirotul Ashnam Mudmainah Vitasari Muhammad Fajri Zetra Muhammad Rishadi Muhammad Salman Al Faridz Novan Purwanto Putri Lidya Sari Putri Lidya Sari Rania Virda Sukmaningsih Refriani Pebria Refriani Pebria, Refriani Reni Rahmadewi Resti Alfianda Ridha Octa Alhuriyyah Azzahra Rifki Reinaldo Rifki Reinaldo Rio Dwi Pambudi Riris Purbosari Riser Fahdiran Rita Amalia Huljannah Rizqon Priyotomo Rizqon Priyotomo, Rizqon Rustana, Cecep E Santa Melenia Putri Sinaga Sarkadi, Sarkadi Setia Budi Setia Budi Shafa Rahma Cyrilla Sifa Alfiyah Sifa Alfiyah Siska Miati Jati Ningsih Sugiamma Sunaryo Sunaryo Sunaryo Sunaryo Teguh Budi Prayitno Tri Bambang A. K. Tri Bambang AK Ulfah Zuhaeriah Vita Efelina Vivi Fitriyani WISNU DJATMIKO Wisnu Purno Aji Wisnu Purno Aji, Wisnu Yani Oktaviani Yayah Kuriah Yayat W. Heriyanto Yayat W. Heriyanto Yuli Rahmawati Yulia Ermadiana Yuliana Yuliana Zahra Anjani