http://repository.ipb.ac.id/handle/123456789/54513 Jurnal Biofisika Tue, 12 May 2026 23:29:02 GMT 2026-05-12T23:29:02Z http://repository.ipb.ac.id/handle/123456789/75942 Optimasi Teknologi Produksi Nanofiber Selulosa Bambu Ampel (Bambussa Vulgaris) Fakhruzy; Naresworo; F. Febrianto; S. Nikmatin Bamboo Ampe/ (bambussa vulgaris) is one of the lignocellulose -containing plants. Easy cultivation and a brief period of growth illustrate the potential of bamboo as a substitute for the use of synthetic fibers. Production process to produce fibers in the size of the nanofiber is the focus in this study. Semi-chemical pulping processed with NaOH done to soften and separate the cellulose fibers. Mechanical processed with disc refiner for atrial fibers (for 4, 7, 10, 13, and 16 times) do well in order to know fibrillation process optimization. Microfibrils which are formed during the ultrasonic wave treatment applied for 2 hours to change the size of the microfibri/s into a nanofiber. The results of the treatment were dried with freeze dryer, and then analyzed using a scanning electron microscopy (SEM) and X - ray diffraction ( XRD) . The results of the SEM analysis showed that the duration of mechanical processes will affect the size of the resulting cellulose microfibrils. Mechanical process 16 times , which has been treated ultrasonic , produce cellulose microfibrils with 480 nm size and crystallinity of cellulose based on the JCPDS ( /COD ) cellulose ( C6H1005 ) X has a monoclinic structuTe for a = 7.87, b = 10.31, c = 10, 13 and a = Y = 90 ~ f3 = 122.0, hid values (position crysta/line cellulose) aTe in the field of 002 ( 20 639). Tue, 01 Jan 2013 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/75942 2013-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/75936 Effect Of Rattan Bark Nanofiber Microstructure With High Energy Milling Method To Quality Mechanical Biocomposites F. N. Ferdiyan; S. Nikmatin Rattan bark fiber is waste of raw rattan production activities. It usually used for roofing houses and strap goods in the traditional markets. Rattan bark fiber containing about 40% cellulose, which was potential to be used as filler for composite applications. Nanotechnology based nanoparticles with High Energy Milling (HEM) has been applied in this rese~rch to find the optimum particle size to be implemented as automotive component filler. Three HEM has been applied (1 hour, 5 hours, and 10 hours), and without HEM (0 hours) as control. Measurable particle size is the size of the single particle. Data in the form of particle size distributions, intensity, number and volume of distribution, so it can be assumed to describe the overall condition of the sample. The result shows that 5 hours milling produce the smallest particle size (16.22 nm) and z averages (129.78 nm). Particle Size Analyzer (PSA) results was related to the Scanning Electron Microscopy (SEM) images of 5 hour milling, particle become smaller and look the same or homogeneous as balls. These results indicate that the cellulose in the form of three-dimensional nanoparticles is spherical, and the mechanical tests show that biocomposite rattan bark fiber performance was highest among the other natural composites (kenaf, acacia, water hyacinth, banana, coconut). Sun, 01 Jan 2012 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/75936 2012-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/75935 Analisa Struktur Kristal Hidroksiapatit Pada Suhu Sintering 1150 Oc S. Nikmatin Synthesis of nanoparticles was obtained from the hemp fiber ultrasonic method. Nanoparticles hemp fiber is used as bio-nanocoomposrle Ultrasonic method of hemp fiber was done with the time variations of surfactant tween 80 3 % as many as 10 samples and 0 % as much as 3 samples. All samples were tested wrlh the Particle Size Analyzer (PSA) to determine the size distribution. The smallest sized fiber was obtained from 105 min sonication with 3 % tween 80, the size is 229. 04 nm. Hemp fiber size with concentration of tween 80 3 % smaller than the concentration of Tween 80 0 %. Hemp fibers with nanometer- size 229.04 has a density of 1.1727 g cm - 3 is smaller than 7500 nanometers in size hemp fibers with a density of 1. 7083 g cm - 3 . Results of X - ray Diffraction ( XRD) showed the smallest size hemp fiber hemp is a cellulose fiber . characterized by their crystal phase cellulose is at 22. 76 degrees diffraction angle with the degree of crystallinity 21 .3727 % . Mon, 01 Jan 2007 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/75935 2007-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/54518 Disinfeksi Escherichia coli dengan fotoelektrokatalis pada lapisan TiO2 Maddu, Akhirudin; Sudana, A.A.; Mubarik, Nisa Rachmania; Dahlan, Kiagus Lapisan Titanium dioksida (TiO2) sebagai fotokatafis ditumbuhkan di atas substrat kaca konduktif transparan (transparent conductive oxide, TCO) melalui metode deposisi horizontal dip coating. Pada uji desinfeksi bakteri E. coli dengan fotoefektrokatafisis menggunakan tegangan bias ekstemal 1V memperlihatkan kemampuan membunuh (inaktivasi) Escherichia coli (E. coli) hingga 51.43% dibandiflgkan metode fotokacaiisis yang hanya sebesar 18.7% se/ama 4 jam perlakuan maupun dengan fotolisis yang hanya 8.5% saja. Hasil tersebut diujicobakan pada suspensi E. coli berkonsentrasi 2 x 108 sel/ml dafam lingkungan kaya nutrisi. Sun, 01 Jan 2006 00:00:00 GMT http://repository.ipb.ac.id/handle/123456789/54518 2006-01-01T00:00:00Z