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All Journal HAYATI Journal of Biosciences Buletin Agrohorti Jurnal Biofisika Jurnal Ilmu Pertanian Indonesia Jurnal Fitopatologi Indonesia Jurnal Teknologi Industri Pertanian Jurnal Ilmu dan Teknologi Hasil Hutan Jurnal Pengolahan Hasil Perikanan Indonesia VALENSI Jurnal Veteriner International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar POSITRON Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia Jurnal Keteknikan Pertanian Jurnal Penelitian Hasil Hutan Buletin Penelitian Tanaman Rempah dan Obat Teknik dan Ilmu Komputer Jurnal Matematika & Sains JFA (Jurnal Fisika dan Aplikasinya) Jurnal Spektra Jurnal Agro JOURNAL ONLINE OF PHYSICS Omega: Jurnal Fisika dan Pendidikan Fisika Jurnal Fisika FLUX Jurnal Riset Veteriner Indonesia (Journal of The Indonesian Veterinary Research) Prosiding Seminar Nasional Teknoka Indonesian Journal of Chemistry Jurnal Purifikasi Jurnal Ilmu Fisika Jambura Physics Journal Jurnal Ilmu dan Teknologi Kayu Tropis JCPS (Journal of Current Pharmaceutical Sciences) JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Jurnal Fisika dan Terapannya Jurnal Penelitian Hasil Hutan Buletin Penelitian Tanaman Rempah dan Obat Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society Makara Journal of Science Makara Journal of Technology Jurnal Ilmiah Sains Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics Radial : Jurnal Ilmiah Sains Dan Rekayasa International Journal of Renewable Energy Development Wahana Fisika : Jurnal Fisika dan Terapannya Jurnal Sains Materi Indonesia
Akhiruddin Maddu
Departemen Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Kampus IPB Dramaga, Jalan Agatis, Bogor 16680 Jawa Barat
Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Veterinary

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PENGARUH KELEMBABAN TERHADAP SIFAT OPTIK FILM GELATIN Maddu, Akhiruddin; Modjahidin, Kun; Sardy, Sar; Zain, Hamdani
Makara Journal of Science Vol. 10, No. 1
Publisher : UI Scholars Hub

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Abstract

Humidity Dependence of Optical Properties of Gelatin Films. Humidity dependence of optical properties of gelatin films prepared by casting technique has been investigated. Gelatin films was investigated its optical properties to varied humidity condition. Optical responses investigated are optical transmission and absorption at visible light spectrum measured utilizing a UV-Vis (Ultraviolet – Visible) spectrophotometer. The results of optical transmittance and absorbance obtained shows an optical response of gelatin films in widely visible light spectrum within range 530 – 680 nm, with most clearly response in a spectrum band in 580 – 650 nm. Different humidity treatment cause a significantly change of optical characteristics, that is the transmittance and absorbance change in to humidity. Transmittance of gelatin films increase with increasing humidity in a range 580 – 650 nm, in contrast with absorbance that is decrease with increasing humidity. Plot of transmission and absorption intensity with varied humidity from 37%RH to 99%RH at 610 nm exhibited a good linearity. Two samples showed same characteristics
PENGARUH KELEMBABAN TERHADAP SIFAT OPTIK FILM GELATIN Maddu, Akhiruddin; Modjahidin, Kun; Sardy, Sar; Zain, Hamdani
Makara Journal of Science Vol. 10, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Humidity Dependence of Optical Properties of Gelatin Films. Humidity dependence of optical properties of gelatin films prepared by casting technique has been investigated. Gelatin films was investigated its optical properties to varied humidity condition. Optical responses investigated are optical transmission and absorption at visible light spectrum measured utilizing a UV-Vis (Ultraviolet – Visible) spectrophotometer. The results of optical transmittance and absorbance obtained shows an optical response of gelatin films in widely visible light spectrum within range 530 – 680 nm, with most clearly response in a spectrum band in 580 – 650 nm. Different humidity treatment cause a significantly change of optical characteristics, that is the transmittance and absorbance change in to humidity. Transmittance of gelatin films increase with increasing humidity in a range 580 – 650 nm, in contrast with absorbance that is decrease with increasing humidity. Plot of transmission and absorption intensity with varied humidity from 37%RH to 99%RH at 610 nm exhibited a good linearity. Two samples showed same characteristics
PENGARUH KELEMBABAN TERHADAP SIFAT OPTIK FILM GELATIN Maddu, Akhiruddin; Modjahidin, Kun; Sardy, Sar; Zain, Hamdani
Makara Journal of Science Vol. 10, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Humidity Dependence of Optical Properties of Gelatin Films. Humidity dependence of optical properties of gelatin films prepared by casting technique has been investigated. Gelatin films was investigated its optical properties to varied humidity condition. Optical responses investigated are optical transmission and absorption at visible light spectrum measured utilizing a UV-Vis (Ultraviolet – Visible) spectrophotometer. The results of optical transmittance and absorbance obtained shows an optical response of gelatin films in widely visible light spectrum within range 530 – 680 nm, with most clearly response in a spectrum band in 580 – 650 nm. Different humidity treatment cause a significantly change of optical characteristics, that is the transmittance and absorbance change in to humidity. Transmittance of gelatin films increase with increasing humidity in a range 580 – 650 nm, in contrast with absorbance that is decrease with increasing humidity. Plot of transmission and absorption intensity with varied humidity from 37%RH to 99%RH at 610 nm exhibited a good linearity. Two samples showed same characteristics
The Acoustical Properties of Indonesian Hardwood Species Karlinasari, Lina; Baihaqi, Hans; Maddu, Akhiruddin
Makara Journal of Science Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

SIFAT OPTIK CARBON DOTS (C-DOTS) DARI DAUN BAMBU HASIL SINTESIS HIJAU BERBANTUKAN GELOMBANG MIKRO Permono Adi Putro; Akhiruddin Maddu
Wahana Fisika Vol 4, No 1 (2019): June
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v4i1.15569

Abstract

Carbon dots (C-dots)  adalah tipe baru dari nanopartikel berpendar yang dapat mudah disintesis dari sumber alami. Sintesis C-dots dari daun bambu telah berhasil dilakukan menggunakan teknik sintesis hijau berbantukan gelombang mikro. Teknik sintesis hijau dilakukan dengan menggunakan air sebagai pelarut non-kimia dan sumber alami. Sintesis dilakukan menggunakan variasi konsentrasi prekursor untuk dipelajari pengaruhnya terhadap sifat fisik dan sifat optiknya. Sifat fisik C-dots menunjukkan warna transparan di bawah cahaya tampak, dan warna hijau di bawah laser UV 405 nm. Sifat optik C-dots dikarakterisasi menggunakan spektrofotometer UV-Vis, dan spektrofotometer dengan sumber eksitasi 405 nm. Konsentrasi prekursor mempengaruhi intensitas eksitasi dan emisi, namun pergeseran Stokes C-dots memiliki kestabilan yang sangat baik dalam larutan berair. Pergeseran Stokes berasal dari keadaan transisi n–π* dari struktur ikatan aromatik C=O pada permukaan C-dots. Kami peroleh C-dots yang berpotensi untuk diaplikasikan sebagai bioimaging seluler in vivo dan in vitro dan biosensing ion logam dan garam.
Porous Carbon Black Microsphere from Palm Oil Black Liquor Jayadi Jayadi; Akhiruddin Maddu; Yessie Sari; Wahyu Bambang Widayatno; Agus Sukarto Wismogroho; Cherly Firdarini; Marga Asta Jaya Mulya
Jurnal Sains Materi Indonesia Vol. 25 No. 1 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.686

Abstract

The aim of this research is to synthesize porous carbon black microspheres from palm oil black liquor through an in-house spray pyrolysis system. The in-house spray pyrolysis (SP) system was developed using a horizontal furnace. To test the developed SP equipment, the temperature profiles within the developed spray pyrolysis chamber were examined at 3 different setting temperatures (800, 900, and 1000 °C). These temperatures were also applied for synthesizing the carbon black microspheres, with and without nitrogen as carrier gas. The morphology of carbon black produced by using SP equipment was tested by a 3D Optical Microscope and FE-SEM. The optimum temperature obtained in this study is 1000 ºC according to the characterization of carbon black microspheres produced. The FE-SEM analysis indicated the presence of spherical carbon having microstructures. This indicates that the in-house spray pyrolysis machine has been successfully developed for synthesizing carbon black microspheres.
Effect of Precursor Solvent on the Carbon Micro-Structures Derived from Spray Pyrolysis of Pine Resin (Gondorukem): Preliminary Study Jayadi; Wahyu Bambang Widayatno; Agus Sukarto Wismogroho; Cherly Firdharini; Akhiruddin Maddu; Husin Alatas; Yessie Widya Sari
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.893

Abstract

Carbon materials have been widely used in various fields. This study aimed to produce carbon using spray pyrolysis with pine resin (gondorukem) as the precursor and different solvents, namely gondorukem-acetone (GAC), gondorukem-ethyl acetate (GEA), and gondorukem-dichloromethane (GDC). The precursor was prepared in a 1:8 (m/v) ratio, and the spray pyrolysis method was employed by heating the atomized precursor solution in the heating zone of a tube furnace. The atomization precursor was infused with nitrogen gas at a rate of 1 l/min with furnace temperature set at 1000°C with heating times of 5, 10, and 20 mins. The carbonaceous materials produced from the pyrolysis were collected on the wire mesh 1000 that was put on a stainless pipe. Carbon that has been coated on the wire mesh 1000 was analyzed using the optical microscope (OM). The physical properties and morphology of the synthesized carbonaceous material were analyzed using field emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), Raman, and Brunaur-Emmett-Teller (BET). Based on FE-SEM analysis, the particle size of the GAC sample has an average of 283.58 nm and the highest carbon content, which reached an average of 97.312 At%. GAC samples had the lowest disorder properties in the Raman spectroscopy test, with the value of ID/IG reaching 0.795764. The functional groups observed were C–H stretching at 2920.49 cm-1, N–H bending at 1629.07 cm-1, and C–O stretching at 1159.70 cm-1. Based on carbon content, disorder properties, and functional group stabilization, carbon from the GAC precursor provides the ideal characteristics to be used as a filter material in medical masks. Meanwhile, based on BET testing, the carbon materials from GEA have the ideal material morphological properties to be used as a filter in medical masks. Spray pyrolysis is an efficient method for producing carbon materials, and the use of gondorukem as the precursor shows great potential for various applications.
Structure and Morphology of ZnO Nanoparticles Prepared by Sonochemical Method Maddu, Akhiruddin; Zetria Zikri; Irzaman, Irzaman
TIME in Physics Vol. 1 No. 2 (2023): August
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2023.v1i2p51-58

Abstract

Ultrasonic wave has been utilized to synthesize the ZnO nanoparticle. ZnO is formed from a mixture of zinc acetate (ZnAc) and Natrium Hydroxide (NaOH) with various concentrations of ZnAc 0.5 M (ZnO 1:1) and 1.5 M (ZnO 3:1) and the concentration of NaOH remained at a concentration of 0.5 M. The Structure and crystal size were characterized using X-ray Diffraction (XRD), while its morphology was examined by Scanning Electron Microscopy (SEM). The results show that ZnO 1:1 has a higher (stronger) diffraction intensity than the ZnO 3:1. The crystallite size of ZnO 1:1 averaged 30.57 ± 4.31 nm while the ZnO 3:1 had an average crystallite size of 20.25 ± 7.12 nm. From the size of the crystallites ZnO particles that are formed include nanoparticles. ZnO 1:1 SEM image shows the shape of microrods in the 1:1 ZnO sample while in the 3:1 ZnO sample no microrods are formed. Based on the morphology, the 1:1 ZnO sample has an average size of 230 nm and is larger than the 3:1 ZnO sample which has an average size of 50 nm.
Kajian Fluktuasi Sifat Dielektrik Telur Puyuh yang Bervariasi pada Lama Penyimpanan Irawan, Bagus; Maddu, Akhiruddin; Rustami, Erus; Sulaeman, Ahmad Sofyan; Putro, Permono Adi
TIME in Physics Vol. 2 No. 1 (2024): March
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2024.v2i1p41-49

Abstract

An increasing of public attention to the quality of food has been increasing, recently. One type of food that consumed is quail eggs (QE). In this study, QE were tested by Electrochemical Impedance Spectroscopy (EIS) method with some parameters such as complex impedance, dielectric constant, and loss tangent analysis. Several interesting results showed that dielectric properties of QE experience a fluctuation phenomenon if the test is influenced by storage duration, qualitatively. Therefore, we approximately prove that QE quality can be tested via EIS to obtain fine results.
Karakterisasi Sifat Listrik Dan Sifat Termal Hidroksiapatit, Fluorhidroksiapatit Dan Fluorapatit Riano, Riza; Sukaryo, Sulistioso Giat; Sugeng, Bambang; Sari, Yessie Widya; Maddu, Akhiruddin
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 7, No 3 (2022): September 2022
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v7i3.1128

Abstract

The apatite compound that is often used in medicine and dentistry is hydroxyapatite with the chemical formula Ca10(PO4)6(OH)2. Fluor ions can substitute hydroxyl ions from hydroxyapatite to form crystals with the formula Ca (PO4)6(OH)2-xF2x, with the value of x indicating the index number of hydroxyl groups (OH-) replaced by fluor ions (F-). This study aims to determine the effect of fluor ion substitution on hydroxyapatite on electrical properties and thermal stability. In this study, the hydrothermal method was characterized by X-Ray diffractometer (XRD), Fourier Transform Infra-Red Spectroscopy (FTIR), LCR meter, Thermogravimetry Analysis (DTA), and Differential Thermal Analysis (TGA). The XRD and FTIR analysis results showed that the samples obtained were in the form of hydroxyapatite, fluorhydroxyapatite, and fluorapatite, which was also indicated by the presence of functional groups PO43-, CO32-, and OH- group libration mode at a wavenumber of 740 cm-1. There was a decrease in the lattice parameter a and an increase in the crystal size as the substitution of fluor ions increased. Based on the results of the electrical and thermal properties characterization, fluorapatite has the highest conductivity and better thermal stability when compared to hydroxyapatite and fluohydroxyapatite.Keywords – Fluor, Hydroxyapatite, Hydrothermal, eggshell, Biomaterial
Co-Authors - - Nurrahman . Sugianto Abdulloh Rifai Agus Ghautsun Niam Agus Sukarto Wismogroho Ahmad Aminuddin Ahmad Sulaeman Andhika Prima Prasetyo Anita Firmanti Auliya Ilmiawati Bagus Irawan Bagus MARTIANTO Baihaqi, Hans Bambang - Riyanto Bambang Herawan Bambang Herawan, Bambang Bambang Riyanto Bambang Sugeng Bonny Poernomo Wahyu Soekarno Budi Arifin Candra A. Basuki Charlena Cherly Firdarini Cherly Firdharini Dede Hermawan Deded Sarip Nawawi Deni Shidqi Khaerudini Dimas Ramadhan Putra Dimas Ramadhan Putra Djoko Pujiarto Dodyk Pranowo Dyah Iswantini Erliza Noor Esa Ghanim Fadhallah Esa Ghanim Fadhallah Faozan Ahmad Farly Reynol Tumimomor Fayakun, Kun Fitri Viva Yuningsih, Aida Fitriani Indahsari Gareso, Paulus P. Gareso, Paulus P. Gustan Pari Gustan Pari Gustan Pari Gustan Pari Gustan Pari Gustan Pari Gustini Syahbirin H. Hardhienata Hamdani Zain Hamdani Zain Hamdani Zain Hamdani Zain Hans Baihaqi Harry Ramza Harry Ramza Henny Purwaningsih HERA MAHESHWARI Herry Suhardiyanto Horasdia Saragih Huda Shalahudin Darusman Husin Alatas Ida Ayu Putu Sri Widnyani ikhwan wirahadikesuma Ikhwan Wirahadikesuma Imelia Dewi Inda Setyawati, Inda Ira Ukhtiningsih Ira Ukhtiningsih, Ira Irmansyah . Irmansyah Irmansyah Irmansyah Irmansyah Irmansyah Irmansyah Irzaman, Irzaman Ismail Budiman Ismail Budiman Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Jayadi Jayadi Jayadi Jhav Sund Oktoricoento Johan D. Sirait Jufra Jufra Jumardin jumardin jumardin Kadapi, Muhamar koekoeh santoso Kokoeh Santoso Kudang Boro Seminar Kun Fayakun Kun Modjahidin Kun Modjahidin, Kun La Ode Muliadi LAKSMI AMBARSARI Liesbetini Haditjaroko Lina Karlinasari Luthfan Irfana M. Farouq Iksan Mahfuddin Zuhri Marga Asta Jaya Mulya Melinia Falestin Mersi Kurniati Moehamad Barmawi Mohamad Rahmad Suhartanto Mohammad Mujirudin Muhammad F Ikhsan Muhammad Ramdani Mujirudin, Mohammad Nafisah Nafisah Novik Nurhidayat Nur Adi Saputra Nurfina Yudasari Nurul Rostami Dewi Nurul Rostami Dewi Oktarina Heriyani Oktoricoento, Jhav Sund Paulus P Gareso, Paulus P Pepen Arifin Permono Adi Putro Pramudito, Sidikrubadi Purwantiningsih Sugita Purwantiningsih Sugita Rahman, Mohammad Syuhaimi Ab Rahmani, Nabiila Rahmaniah Nalwi Rahmaniah Nalwi Ramdani, Muhammad Ramza, Harry Rasyida Ulfa Ratna Sari Dewi Riano, Riza Rini Kurniasih, Rini Rinto Paputungan Rustami, Erus Safaruddin A Prasad Sahrudin Sahrudin Sahrudin, Sahrudin Sar Sardy Sar Sardy Sar Sardy Setyanto Tri Wahyudi Siti Nikmatin Sofian, Irmansyah Subyakto Subyakto SUBYAKTO SUBYAKTO Sugianto Arjo Sugianto, . Sugianto, . Sugianto, Sugianto Suhartanto, Muhammad Rahmad Sulaeman, Ahmad Sofyan Sulistioso Giat Sukaryo, Sulistioso Giat Sultan, Syamsu Supian, Latifah Sarah Supriyanto . Taqiyyah, Izzatut Tarcisius Rio Mardikanto Tatang Hidayat Wahyu Bambang Widayatno Wasrin Syafii Yayan Firmansyah Yessie Sari Yessie Widya Sari Yogi Waldingga Hasnedi Yulia Irdawati Yulia Sani Yulia Sani, Yulia Zetria Zikri