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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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Development of Cement-Coir Carbon Fiber Composites with Damage Self Detection Capability Ismail Budiman; Subyakto Subyakto; Akhiruddin Maddu; Gustan Pari
Wood Research Journal Vol 3, No 2 (2012): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2012.3.2.74-80

Abstract

Research on the manufacture of cement-carbon composite materials using carbon fiber from coconut coir fiber has been performed. Carbonization was carried out at two phases. First, it was carbonized at a temperature of 400°C for 300 min and continued by the second phase at a temperature of 800°C for 60 min. The structures of carbon fiber was measured using X-Ray Diffraction (XRD) while the sample surface analysis was carried out using Scanning Electron Microscope (SEM) and the electrical conductivity of samples was measured using LCR (Inductance Capasitance and Resistance) meter. Three carbon types (carbon without treatment, carbon soaked in 10% and 20% solution of potassium hydroxide (KOH)) were used to manufacture cement-carbon composites. Three levels of carbon content of 0.5, 0.75 and 1.0% by weight of cement were used. Results showed that the cement-carbon composite added with soaked carbon in 20% solution of KOH at 1.0% carbon content has the best properties of compressive strength (24.94 ± 1.24 MPa), modulus of rupture (MOR) (5.23 ± 0.47 MPa) and damage self-detection (load at the first crack = 21.04 N).
The use of modern devices and human activity today have increased noise problem. The applicaton of acoustic panels in building construction could be as an alternative to overcome this problem. The purpose of this study was to investigate acoustical properties of sound absorption coefficient and sound transmission loss from wood wool or excelsior board. Three fast growing species, sengon (Paraserianthes falcataria), african wood (Maesopsis eminii), and mangium (Acacia mangium) lumbers were proces Lina KARLINASARI; Dede HERMAWAN; Akhiruddin MADDU; Bagus MARTIANTO
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 4 No. 1 (2011): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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

Abstract

The use of modern devices and human activity today have increased noise problem. The applicaton of acoustic panels in building construction could be as an alternative to overcome this problem. The purpose of this study was to investigate acoustical properties of sound absorption coefficient and sound transmission loss from wood wool or excelsior board. Three fast growing species, sengon (Paraserianthes falcataria), african wood (Maesopsis eminii), and mangium (Acacia mangium) lumbers were processed to obtain wool particles. Two different categories of board density and types of resins were used in this study. Sound absorption coefficient was determined using the impedance tube method, while that for the determination of transmission loss based on the reverberation room method. The results showed that the board density of 0.8 g/cm3 had good sound absorption for low and high frequencies compared with board of 1.0 g/cm3. In the medium frequencies those boards reflected the sound. Wood wool cement bonded board was good in sound absorption for high frequency. In the range low to high frequencies, the boards with isocyanate adhesive were good in transmission loss value compared with cement bonded boards. Meanwhile, the boards with density of 1.0 g/cm3 possessed transmission loss value higher than board of 0.8 g/cm3.   Keywords:     acoustic panel, wood wool board, fast growing species, sound absorption, transmission loss
BATERAI CERDAS DARI ELEKTROLIT POLIMER KITOSAN-PVA DENGAN PENAMBAHAN AMONIUM NITRAT Bambang Riyanto; Akhiruddin Maddu; Ratna Sari Dewi
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 14 No 2 (2011): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1374.616 KB) | DOI: 10.17844/jphpi.v14i2.5314

Abstract

Batteries are practical and inexpensive source of energy. Avariety of new battery material technology continue to be developed, along with the demands of green technology. Chitosan is a biopolymer, non-toxic, and the nitrogen atom in the amine and hydroxyl group has free electron, so that can be used as an electrolyte polymer which has good ionic conductivity and can be fabricated as batteries. The purpose of this study was to determine the characteristics of polymer electrolyte chitosan-PVA batteries with addition of ammonium nitrate. The best material formulation obtained of polymer electrolyte made from 40 wt% chitosan, 60 wt% PVA, and 6% glutaraldehida. SEM showed that the polymer electrolyte formed was very homogeneous. X-ray diffraction (XRD) showed an amorphous structure. The ion conductivity tends to increased along with the increasing of added ammonium nitrate. The conductivity value obtained was 2.2 x 10 -5  S cm  for the sample by addition ammonium nitrate 35 wt%. Chitosan-PVA based battery has voltage 0.95 V, electric current 0.7 mA, and can show a color fading along with decreasing battery power. With this character it can be developed as smart battery. Key words: battery, chitosan, ion conductivity, polymer electrolyte
PENDETEKSIAN TINGKAT KESEGARAN FILET IKAN NILA MENGGUNAKAN PENGUKURAN SIFAT BIOLISTRIK Bambang Riyanto; Akhiruddin Maddu; Supriyanto .
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 15 No 1 (2012): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (346.386 KB) | DOI: 10.17844/jphpi.v15i1.5330

Abstract

The development of modern rapid detection techniques of fish freshness requires a new perspective of the importance of physical chemical characteristics during deterioration process of quality fishery products. Positive correlation between the changes of fish body and the electrical properties is a basic information for support the development of the detection modern techniques of fish freshness. Studies of the electrical properties become more relevant along with the increasing demand of fish fast food consumption and fish product from freshwater aquaculture, which have been less done until now. The objective of this study was to detect freshness of tilapia fillets using bioelectrical properties. The result showed that level of freshness of tilapia fillet can be detected by using bioelectrical which has correlation with TVB, TPC and pH. The level of freshness of tilapia fillet during 16 hours observation showed that impedance tend to decrease with the range of 44.34-6.30 Ω, while dielectric constant and the electrical conductivity tend to increase with range of 178,208 to 2,812,764 and 0.065 to 0.487 S/m.Key words: bioelectrical, fish freshness, tilapia fillet, quality deterioration
KEMASAN CERDAS PENDETEKSI KEBUSUKAN FILET IKAN NILA Bambang Riyanto; Akhiruddin Maddu; Yogi Waldingga Hasnedi
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 13 No 2 (2010): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3643.978 KB) | DOI: 10.17844/jphpi.v13i2.5354

Abstract

Smart packaging that can detect the level of quality deterioration of fish is a new inspiration in providing the sense of practicality, quality assurance and food safety of fishery products in the future. Analysis of optical characteristics and dynamic nature of the response to the smart packaging with 48 mL chitosan-acetic 1% (w/v), 48 mL polyvinyl alcohol 1% (w/v) and 4 mL bromthmol blue indicator 0.2% based shows the real trend in detecting spoilage rate of tilapia fillet. Smart packaging visually can provide patterns of color changes from yellow to dark yellow next turn into green and the last become turquise during the process of fish spoilage. The spoilage rates observed of tilapia fillet with a parameter test value TVBN and TBC, showed the same tendency in detecting spoilage rate tilapia fillet, where the TVBN rate increased from 8.40+_0.40 mg N/100 g at the 0 hour to 52.36+_1.98 mg N/100 g at 15 hours and TBC rates from log 4.35+_0.07 (2.3x10 pangkat 4) CFU/g at the 0 hour to log 9.11+_0.05 (1.3x10 pangkat 9) CFU/g log at 15 hours.Keywords: fish spoilage, smart packaging, tilapia fillet.
MATERIAL BIOKERAMIK BERBASIS HIDROKSIAPATIT TULANG IKAN TUNA Bambang - Riyanto; Akhiruddin - Maddu; - - Nurrahman
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 16 No 2 (2013): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1095.194 KB) | DOI: 10.17844/jphpi.v16i2.8046

Abstract

Material biokeramik berbasis hidroksiapatit memiliki prospek baru dalam industri elektronika danmikroteknologi masa depan. Hidroksiapatit dengan sumber bahan baku alami merupakan potensi besar,terlebih pemanfaatan limbah tulang ikan tuna yang masih belum dilakukan dengan baik. Teknologi sintesisyang ada juga belum efektif serta karakterisasi materialnya belum banyak dikembangkan. Penelitianini bertujuan mensintesis dan mengetahui karakteristik material biokeramik berbasis hidroksiapatittulang ikan tuna. Metode yang digunakan dalam pengekstraksian hidroksiapatit tulang ikan tuna adalahdengan pemanasan suhu tinggi (sintering). Melalui suhu sintering 700ºC telah dapat dihasilkan materialbiokeramik berbasis hidroksiapatit dari tulang ikan tuna dengan rendemen tertinggi (65,61±2,21)% danberwarna putih. Semakin tinggi suhu sintering, semakin tinggi derajat kristalinitasnya, sedangkan denganSEM memperlihatkan partikel penyusunnya berukuran 0,050 μm sampai 0,803 μm dan menyerupaibentuk kristal heksagonal. Nilai kapasitansi mengalami penurunan dengan bertambahnya frekuensi yangdiberikan, dengan nilai tertinggi 0,0061 nF, sedangkan nilai konduktivitas mengalami kenaikan seiringdengan bertambahnya frekuensi dengan nilai terendah 7,73 x 10-5 S/m.Kata kunci: biokeramik, hidroksiapatit, sintering, tulang ikan tuna
Microwave Absorbent Packaging Material from Composites Chitosan-Polyvinyl Alcohol Polymer Bambang - Riyanto; Akhiruddin - Maddu; Esa Ghanim Fadhallah
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 17 No 2 (2014): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3079.208 KB) | DOI: 10.17844/jphpi.v17i2.8695

Abstract

Microwave absorbent packaging materials currently tend to biomaterial. Chitosan is a dielectric biomaterial with polycationic properties. The aim of this study was to analyze characteristics of microwave absorbing packaging material made from composite chitosan-polyvinyl alcohol (PVA) polymer. The ability of the packaging material to absorb microwave was determined by reflection loss measurement. Formed packaging prototype resembles as a thin transparent yellowish plastic with thickness (0.11-0.22 mm) and the tensile strength (106.33±2.82-143.00±2.59 kPa). SEM analysis showed homogenous structure characterized by interaction between chitosan and PVA. Optimum absorption value was obtained from chitosan concentration of 1%, with average value of reflection loss was (-31.9289±4.0094) dB.Keywords: chitosan, material packaging, microwave, reflection loss
Microwave Absorbent Packaging Material from Composites Chitosan-Polyvinyl Alcohol Polymer Bambang - Riyanto; Akhiruddin - Maddu; Esa Ghanim Fadhallah
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 17 No 2 (2014): Jurnal Pengolahan Hasil Perikanan Indonesia
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3079.208 KB) | DOI: 10.17844/jphpi.v17i2.8696

Abstract

Microwave absorbent packaging materials currently tend to biomaterial. Chitosan is a dielectric biomaterial with polycationic properties. The aim of this study was to analyze characteristics of microwave absorbing packaging material made from composite chitosan-polyvinyl alcohol (PVA) polymer. The ability of the packaging material to absorb microwave was determined by reflection loss measurement. Formed packaging prototype resembles as a thin transparent yellowish plastic with thickness (0.11-0.22 mm) and the tensile strength (106.33±2.82-143.00±2.59 kPa). SEM analysis showed homogenous structure characterized by interaction between chitosan and PVA. Optimum absorption value was obtained from chitosan concentration of 1%, with average value of reflection loss was (-31.9289±4.0094) dB.Keywords: chitosan, material packaging, microwave, reflection loss
DEGRADASI BAHAN ORGANIK DAN PEMANFAATAN ARUS LISTRIK PADA SEDIMEN TAMBAK UDANG TRADISIONAL MELALUI MICROBIAL FUEL CELL Bambang Riyanto; Akhiruddin Maddu; Yayan Firmansyah
Jurnal Pengolahan Hasil Perikanan Indonesia Vol 15 No 3 (2012): Jurnal Pengolahan Hasil Perikanan Indonesia 15 (3)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (457.601 KB) | DOI: 10.17844/jphpi.v15i3.21312

Abstract

Pengembangan budidaya udang yang sering mengalami permasalahan besar terutama pencemaran sedimen tambak akibat sisa pakan. Microbial fuel cell (MFC) sebagai pendegradasi atau penurunan akumulasi bahanorganik pada tambak udang belum pernah dikembangkan. Penelitian ini bertujuan menganalisis penurunan akumulasi bahan organik dan arus listrik yang dihasilkan pada sedimen tambak udang tradisional melaluimicrobial fuel cell. Tahapan penelitian meliputi pengukuran kualitas air dan analisis sedimen tambak, pembuatan rangkaian MFC, pengukuran arus dan tegangan listrik, serta karakterisasi substrat hasil proses degradasi bahan organik. Kualitas air tambak udang tradisional di Desa Jayamukti yaitu suhu berkisar 29-30°C; salinitas 18-20 ppm; pH 7,5-8,5; DO 3-4 mg/L; dan kecerahan 25-30 cm. Tekstur sedimen tergolong tanah liat dengan kandungan karbon organik (C) 1,45±0,44%, nitrogen (N) 0,11±0,03%, rasio C/N 13 dan fosfor (P) 59 ppm. Setelah 40 hari aktivitas, kandungan bahan organik mengalami penurunan, yaitu karbon organik menjadi 1,29±0,34%, nitrogen 0,10±0,02%, rasio C/N 12 dan kandungan P 40±4,08 ppm. Nilai kapasitas tukar kation (KTK) juga mengalami penurunan menjadi 21,53±2,7 (cmol(+)/kg), dan nilai kation
Development of Cement-Coir Carbon Fiber Composites with Damage Self Detection Capability Ismail Budiman; Subyakto Subyakto; Akhiruddin Maddu; Gustan Pari
Wood Research Journal Vol 3, No 2 (2012): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2012.3.2.74-80

Abstract

Research on the manufacture of cement-carbon composite materials using carbon fiber from coconut coir fiber has been performed. Carbonization was carried out at two phases. First, it was carbonized at a temperature of 400°C for 300 min and continued by the second phase at a temperature of 800°C for 60 min. The structures of carbon fiber was measured using X-Ray Diffraction (XRD) while the sample surface analysis was carried out using Scanning Electron Microscope (SEM) and the electrical conductivity of samples was measured using LCR (Inductance Capasitance and Resistance) meter. Three carbon types (carbon without treatment, carbon soaked in 10% and 20% solution of potassium hydroxide (KOH)) were used to manufacture cement-carbon composites. Three levels of carbon content of 0.5, 0.75 and 1.0% by weight of cement were used. Results showed that the cement-carbon composite added with soaked carbon in 20% solution of KOH at 1.0% carbon content has the best properties of compressive strength (24.94 ± 1.24 MPa), modulus of rupture (MOR) (5.23 ± 0.47 MPa) and damage self-detection (load at the first crack = 21.04 N).
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