Article Per Year (5 Year)
p-Index From 2020 - 2025
1.259
P-Index
This Author published in this journals
All Journal Program Kreativitas Mahasiswa - Penelitian Jurnal Matematika dan Ilmu Pengetahuan Alam Dental Journal (Majalah Kedokteran Gigi) Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Optika : Jurnal Pendidikan Fisika Indonesian Applied Physics Letters International Journal of Multidisciplinary Approach Research and Science Jurnal Ilmu Administrasi: Media Pengembangan Ilmu dan Praktek Administrasi FAWAID: Sharia Economic Law Review Prosiding Seminar Nasional Unimus
Aminatun Aminatun
Department Of Physics, Faculty Of Mathematics And Physics, Universitas Airlangga
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
SINTESIS PADUAN KOBALT MELALUI TEKNIK PELEBURAN DAN KARAKTERISASINYA SEBAGAI IMPLAN TULANG PROSTHESIS Normasari Susanto, Efinda Putri; Indriani, Arista; Himawati, Umi; Aminatun, Aminatun
Program Kreativitas Mahasiswa - Penelitian PKM-P 2013
Publisher : Ditlitabmas, Ditjen DIKTI, Kemdikbud RI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.295 KB)

Abstract

Cobalt-based alloys are widely used to be prosthesis because of their excellent properties. In this work, cobalt alloys variation of Cr have been synthesized by smelting method and accompanied by rolling process. The evaluated material properties show that microstructure dominant by γ phase. It was also found that the whole process of synthesis have good solubility. Hardness value show variation of 33% Cr include on the range of ASTMF75 that is 345,24 VHN. Corrosion test result show variation of 31,5% and 34,5% Cr satisfy corrosion rate of Europe standard (0,457 mpy). But on the other hand, they have good biocompatibility.Keywords: Cobalt alloys prosthesis, microstructure, hardness value, corrosion rate, cytotoxicity.
Kajian Proses Sintering pada Metode Metalurgi Serbuk Paduan Kobalt Sebagai Kandidat Material Implan Tulang Aminatun, Aminatun
Jurnal Matematika dan Ilmu Pengetahuan Alam Vol 17, No 1 (2015)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.452 KB)

Abstract

This study aimed to find out the optimum sintering temperature and time on the powder metallurgy method to produce cobalt alloy as candidate bone implants material. The quality of the metal alloy of the metallurgi method is determined by the temperature and time of sintering, resulting in the selection of these two parameters will be generated alloy which has a crystal structure as expected with better mechanical properties along with the crystal structure. The sintering process used powder metallurgy method with composition of 63.75 % Co - 30 % Cr - 5 % Mo - 0 , 5 % Mn - 0 , 5 % Si - 0 , 25 % N adjusted to ASTM F75. The initial step is all the ingredients of the milling process were mixed at a speed of 350 rpm for 15 minutes. Furthermore, powder was compressed with 21 MPa pressure at 200°C with 10 minutes holding time in the form of pellets with diameter of 1.5 cm. The pellet was sintered with temperature variations of 1100 ºC, 1200 ºC and 1300 ºC for 2 hours holding timeeach, and at a temperature of 1300 ºC with a variation of 1 hour and 3 hours holding time. The results showed that the crystal structure of the cobalt alloy contained 3 phase, which are phase γ (FCC), phase ɛ (HCP), and σ phase (tetragonal). γ phase appears at a temperature of 1300ºC with 1 and 2 hours holding time. The emergence of this γ -phase led to the increase of cobalt alloy hardness value, because γ –phase is a stable phase with a density greater than the other phases. The highest hardness value of 304.7 ± 9.0VHN with the largest γ-phase fraction (34.9 %) was obtained at a sintering temperature of 1300 ºC with 2 hours holding time. SEM - EDX test results indicated that cobalt alloys still contain pores or cavities with the uneven elements distribution and oxidation occurs. Based on these results it can be concluded that the sintering temperature of 1300 ºC with 2 hours holding time is the optimal sintering temperature and time to produce a cobalt alloy which has potential as bone implant material in terms of hardness value.Keywords: cobalt alloy, powder metallurgy, sintering
The Copper concentration variation to physical properties of high copper amalgam alloy Aminatun Aminatun
Dental Journal (Majalah Kedokteran Gigi) Vol. 39 No. 3 (2006): September 2006
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.919 KB) | DOI: 10.20473/j.djmkg.v39.i3.p133-137

Abstract

The function of copper (Cu) inside amalgam is to increase hardness and impact force and to decrease thermal expansion coefficient. In general, amalgam which is used in dentistry and available in the market is contain Cu 22%, while the maximum Cu concentration is 30%. It is necessary to determine the concentration Cu does generate the best physical properties to be used as dental restorative agent. Amalgam is made by mixing blended-metal Ag-Sn-Cu (with Cu concentration of 13%, 21%, 22%, and 29%) and Hg, stirred manually in a bowl for 15 minutes,leave it in temperature 27°C for 24 hours to become hardened. The result of X-Ray Diffractometer (XRD), analyzed by Rietveld method and Rietica program, shows amalgam with Cu 29% concentration for Cu3Sn compound density is 31.790 sma/Å3, for Ag2Hg3 compound is 41.733 sma/ Å3, a Cu3Sn relative weight percentage of 43.23%, Ag2Hg3 of 54.54%, Cu 7Hg6 of 2.23% and hardness of Cu 29% is 90.700 ± 0.005 kgf/mm2. These numbers are the highest values on Cu 29% concentrations compared to other copper concentration variants. Whereas amalgam thermal expansion coefficient on Cu 29% is (2.17 ± 0.91)10-3 mm/°C is the lowest value compared to other Cu concentration. The conclution is that adding Cu concentration into amalgam will increase density value, Cu3Sn relative weight percentage, hardness level and will decrease amalgam thermal expansion coefficient. Amalgam 29% Cu concentration has better physical properties compared to amalgam Cu 22% concentration.
3D Printing Geometric Scaffold Design Variation of Injectable Bone Substitutes (IBS) Pa Dyah Hikmawati; Sarda Nugraheni; Aminatun Aminatun
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23447

Abstract

3D printing technology application in tissue engineering could be provided by designing geometrical scaffold architecture which also functionates as drug delivery. For drug delivery scaffold on bone tuberculosis, the cell pore of the geometric design was filled with Injectable Bone Substitutes (IBS) which had streptomycin as anti-tuberculosis. In this study, scaffolds were synthesized in three cells geometric filled by Injectable Bone Substitutes (IBS), Hexahedron, Truccated Hexahedron, and Rhombicuboctahedron, which had 2.5 mm x 2.5 mm x 2.5 mm size dimension and 0.8 mm strut. The final design was printed in 3D with polylactic acid (PLA) filament using the FDM process (Fused Deposition Modelling). The composition of IBS paste was a mixture of hydroxyapatite (HA) and gelatine (GEL) 20% w/v with a ratio of 60:40, streptomycin 10 wt% and hydroxypropyl methylcellulose (HPMC) 4% w/v. It was then characterized using Fourier-transform infrared spectroscopy (FTIR). Scaffold–paste characterization was included pore size test of 3D printing result before and after injected using Scanning Electron Microscope SEM, porosity test, and compressive strength test. The result showed that the pore of scaffold design was 1379 µm and after injected with IBS paste, the pore leaving 231.04 µm of size. The scaffold with IBS paste porosity test showed ranges between 40,78-70,04% while the compressive strength of before and after injected ranges between 1,110-634 MPa and 2,217-6,971 MPa respectively. From the test results, the scaffold 3D printing with IBS paste in this study had suitable physical characteristics to be applicated on cancellous bones which were infected by tuberculosis.
MECHANICAL CHARACTERISTIC STUDY OF COBALT ALLOY PREPARED BY POWDER METALLURGY METHOD Aminatun Aminatun; Jan Ady; Mega Farynda KD
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23448

Abstract

This study was conducted to determine the effect of compaction pressure and sintering temperature variations on the properties of physical, mechanical, and micro cobalt alloy. Manufacture of the cobalt alloy with compositions 63,75%, chromium 30%, molybdenum 5%, manganese 0,5%, silicon 0,5%, and 0,25% nitrogen using powder metallurgy method. Variations of compaction pressure were 339,70 MPa, 396,31 MPa, dan 452,93 MPa, and sintered at temperature 12000C and 130 0C for 2 hours of holding time. Density was increased along with the increasing compaction pressure and sintering temperature (3,9-6,6 g/cm). The hardness was also increased along with the increasing compaction pressure and sintering temperature  205,1-316,2 VHN. XRD results showed that γ phase with fcc structure was formed at the temperature of 12000C and 13000C for all variations of pressure. SEM-EDX results showed that the oxygen content decreased along with increasing compaction pressure and sintering temperature. Based on ASTM F75 hardness standard, the sample with compaction pressure 452,93 MPa and sintered at 13000C was the best cobalt alloy with a hardness value of 316.2 VHN.
PENGELOLAAN BANTUAN DANA HIBAH REVITALISASI POSYANDU DARI PEMERINTAH PROPINSI JAWA BARAT PADA KECAMATAN CIMAHI TENGAH KOTA CIMAHI Dinoroy Marganda Aritonang; Aminatun Aminatun
Jurnal Ilmu Administrasi: Media Pengembangan Ilmu dan Praktek Administrasi Vol. 11 No. 2 (2014): Jurnal Ilmu Administrasi
Publisher : Sekolah Tinggi Ilmu Administrasi Lembaga Administrasi Negara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31113/jia.v11i2.45

Abstract

Pengelolaan dana hibah merupakan salah satu hal yang masih jarang diteliti, setidaknya dalam kontek penelitianadmininistrasi publik. Dalam tulisan ini, diuraikan secara sederhana bagaimana pengelolaan dana hibah yang diberikanoleh pemerintah daerah kepada posyandu yang berada dalam wilayah kerjanya. Penelitian ini berbasis kualitatif dengansifat yang deskriptif. Di dalam penelitian ini ditemukan beberapa hal yang mungkin merupakan persoalan yang hampirsama pada jenis-jenis dana hibah lainnya. Yang membuat menarik adalah bagaimana posyandu menggunakan danahibah yang amat sedikit dengan tujuan agar terjadi peningkatan strata bagi tiap posyandu. Oleh karena itu dalampenelitian ini disampaikan beberapa hal yang menjadi persoalan dan kondisi nyata bagaimana pola pengelolaan danahibah tersebut.
Analysis of the Benefits of X-Ray Waves in Ultrasound: Literature Review Aminatun, Aminatun; Sumo, Maimon; Muslimah, Muslimah; Mutmainnah, Mutmainnah; Islami, Yasmin Sabrina Nur
International Journal of Multidisciplinary Approach Research and Science Том 2 № 01 (2024): International Journal of Multidisciplinary Approach Research and Science
Publisher : PT. Riset Press International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59653/ijmars.v2i01.523

Abstract

In the information age like now, waves are very influential on human life. Almost all living creatures on earth are inseparable from the use of waves. One of them is X-ray and ultrasound waves. The use of X-rays and ultrasonic (USG) waves in various fields, especially in the health sector, is an important aspect of technological development. As well as its application in the medical and industrial fields. Electromagnetic waves, especially X-rays, have become an irreplaceable diagnostic instrument in visualizing the internal structure of the human body. The various benefits of X-rays are explained, from diagnosing bone fractures to radiotherapy treatment for cancer. On the other hand, ultrasound is used for pregnancy checks, monitoring the condition of the fetus, and detecting tumors and other disorders. Although ultrasound does not use direct X-ray waves, the integration of X-ray processing technology can increase image resolution and provide more comprehensive information. In this article, we will discuss several benefits of waves, namely X-ray and ultrasound waves. X-rays use electromagnetic waves with a higher frequency that are ionizing. Meanwhile, ultrasound uses ultrasonic waves with non-ionization properties. The use of X-ray and ultrasound waves includes the medical and industrial fields. The research method uses literature studies by collecting and analyzing information from various credible sources obtained from 15 journals and 3 books. The results of the literature analysis include definitions, frequencies, and wavelengths, as well as the benefits and properties of X-rays and ultrasound. Although both are rarely used, some techniques combine them to increase image resolution and clarity.
STUDI PUSTAKA: IDENTIFIKASI DAMPAK RADIOAKTIVITAS PADA LINGKUNGAN DAN KESEHATAN MANUSIA Aminatun, Aminatun; Umamah, Chairatul; Fadilah, Nur; Rohmatika, Naili; Amin, Moh. Ma'ruf
OPTIKA: Jurnal Pendidikan Fisika Vol. 8 No. 2 (2024): OPTIKA: Jurnal Pendidikan Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/optika.v8i2.4525

Abstract

Kecanggihan teknologi telah membawa perubahan signifikan di berbagai bidang, terutama dalam lingkungan dan kesehatan. Radioaktivitas yang merupakan salah satu metode yang banyak digunakan dalam kemajuan teknologi ini, memiliki aplikasi luas terutama dalam  bidang kedokteran dan industri. Meskipun memiliki manfaat signifikan, radioaktivitas juga membawa dampak negatif yang signifikan terhadap lingkungan dan kesehatan manusia. Penelitian ini bertujuan untuk memperjelas dan menganalisis dampak radioaktivitas pada lingkungan dan kesehatan manusia yang sangat besar. Fokus analisisnya adalah terhadap gas-gas polutan yang dapat menyebabkan pencemaran lingkungan serta pengaruh unsur radioaktif alam dan radiasi jika bereaksi pada tubuh manusia. Metode yang digunakan dalam penelitian ini adalah studi pustaka yang dikumpulkan dari berbagai sumber seperti jurnal, buku, dan internet. Hasil penelitian menunjukkan bahwa radioaktivitas dapat menyebabkan pencemaran lingkungan, termasuk polusi udara tanah dan air, serta berdampak kesehatan seperti kanker paru-paru akibat paparan radon dan gangguan kesehatan lainnya. Radioaktivitas juga berpotensi menyebabkan kerusakan genetik pada flora dan fauna. Penelitian ini menekankan pentingnya regulasi dan upaya mitigasi seperti pengembangan teknologi solidifikasi/stabilisasi yang efektif dan pemantauan terus-menerus untuk meminimalkan dampak negatif radioaktivitas serta perlunya peningkatan kesadaran masyarakat mengenai risiko yang ditimbulkan.
PENGUATAN KARAKTER KEWIRAUSAHAAN SISWA SMK MELALUI PELATIHAN GREEN SINTESIS NANOPARTIKEL DARI EKSTRAK TUMBUHAN UNTUK TABIR SURYA Siswanto, Siswanto; Ady, Jan; Rudyardjo, Djony Izak; Hikmawati, Dyah; Aminatun, Aminatun; Zaidan, Andi Hamim; Samian, Samian; Supadi, Supadi; Firdaus, Indri K; Junico, Vallery Ofelia
Prosiding Seminar Nasional Unimus Vol 7 (2024): Transformasi Teknologi Menuju Indonesia Sehat dan Pencapaian Sustainable Development G
Publisher : Universitas Muhammadiyah Semarang

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

Abstract

Pengabdian masyarakat di SMK ini bertujuan untuk memperkuat karakter kewirausahaan siswa melaluipelatihan berbasis inovasi teknologi, yakni green sintesis nanopartikel dari ekstrak tumbuhan untuk tabirsurya. Pelatihan ini dirancang untuk mengajarkan siswa teknik sintesis nanopartikel ramah lingkungan yangmemiliki aplikasi praktis dalam pembuatan produk kosmetik, khususnya tabir surya. Dalam kegiatan ini,peserta tidak hanya belajar tentang aspek teknis, tetapi juga tentang kewirausahaan dan potensi pasarproduk yang mereka buat. Evaluasi tingkat kepuasan peserta menggunakan Customer Satisfaction Index(CSI) menunjukkan nilai rerata sebesar 83,77%, mencerminkan kepuasan tinggi terhadap pelatihan yangdiberikan. Selain itu, terdapat peningkatan signifikan dalam pemahaman materi yang diukur melalui tespre-test dan post-test. Nilai pre-test peserta yang berada dalam rentang 20-60 meningkat menjadi 75-95pada post-test, menandakan efektivitas pelatihan dalam meningkatkan pengetahuan dan keterampilansiswa. Kegiatan ini tidak hanya memperluas wawasan siswa tentang teknologi nano dan keberlanjutan,tetapi juga memotivasi mereka untuk mengeksplorasi peluang kewirausahaan dalam bidang industrikosmetik. Dengan hasil ini, diharapkan siswa dapat lebih siap menghadapi tantangan industri serta memilikisikap kewirausahaan yang kuat Kata Kunci: SMK, Kewirausahaan, Nanopartikel, Green Sintesis, Tabir Surya
Pembuatan Pupuk Organik dengan Memperkecil Ukuran Bahan Baku Sebagai Upaya Mandiri Pupuk Di Desa Bulus, Bandung Tulungagung Siswanto, Siswanto; Hikmawati, Dyah; Aminatun, Aminatun; Djony Izak, Djony Izak; Ady, Jan; Ukhrowiyah, Nuril; Sapuan, Imam; Arifianto, Deny; Supardi, Adri; Rochman, Mochammad Nurur
Abdimas Galuh Vol 7, No 1 (2025): Maret 2025
Publisher : Universitas Galuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25157/ag.v7i1.17061

Abstract

Kelangkaan pupuk bersubsidi telah menjadi permasalahan bagi petani di seluruh Indonesia, termasuk di Desa Bulus, Bandung, Tulungagung. Terjadi ketidakseimbangan antara pasokan dan permintaan, yang berdampak pada produktivitas pertanian. Penggunaan pupuk urea yang berlebihan dapat merusak kesuburan tanah dan berkontribusi terhadap pencemaran lingkungan. Pupuk organik menjadi solusi alternatif bagi lingkungan dan kesehatan tanah jangka panjang. Selain itu dapat meningkatkan retensi air, dan keberagaman mikroba, sehingga mengurangi ketergantungan pada pupuk kimia. Salah satu metode yang menjanjikan untuk produksi pupuk organik adalah komposting, khususnya metode Takakura, yang menggunakan fermentasi terkontrol dari bahan organik. Selain itu, pengurangan ukuran sampah organik melalui perajangan dapat mempercepat proses dekomposisi, meningkatkan efisiensi dan kualitas kompos. Program pengabdian masyarakat di Desa Bulus ini bertujuan untuk mengedukasi petani tentang produksi pupuk organik yang efisien, menggunakan metode Takakura, tong komposter, dan pupuk cair organik. Pelatihan ini melibatkan 30 petani dan berfokus pada peningkatan efisiensi produksi pupuk melalui perajangan sampah organik. Evaluasi pasca-pelatihan menunjukkan peningkatan yang signifikan dalam pengetahuan dan keterampilan peserta, dengan rata-rata nilai meningkat sebesar 25-30 poin. Penggunaan bahan organik yang dipotong kecil-kecil mengurangi waktu pengomposan dan meningkatkan kualitas pupuk. Evaluasi program menunjukkan kepuasan yang tinggi di kalangan peserta, terutama terkait relevansi dan penerapan praktis materi yang disampaikan. Hasil ini menunjukkan bahwa produksi pupuk organik, bersama dengan teknik pengolahan sampah yang efisien, dapat mendukung pertanian yang berkelanjutan di komunitas pedesaan yang menghadapi kelangkaan pupuk.
Co-Authors Adri Supardi, Adri Amin, Moh. Ma'ruf Andi Hamim Zaidan Arifianto, Deny Arista Indriani Asni Asni Chairatul Umamah Dinoroy Marganda Aritonang Djony Izak Rudyardjo Djony Izak, Djony Izak Efinda Putri Normasari Susanto Firdaus, Indri K Imam Sapuan Islami, Yasmin Sabrina Nur Jan Ady Jan Ady Junico, Vallery Ofelia Kartini Kartini Maimon Sumo Mega Farynda KD Muslimah Muslimah Mutmainnah Mutmainnah NUR FADILAH Nuril Ukhrowiyah Rochman, Mochammad Nurur Rohmatika, Naili S Siswanto Samian Sarda Nugraheni Supadi Supadi Umi Himawati