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INDONESIA
Jurnal Biofisika
Published by Institut Pertanian Bogor
ISSN : 18296009     EISSN : -     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
Jurnal Biofisika terbit 2 kali dalam setahun. Dikelola oleh Departemen Fisika, Institut Pertanian Bogor.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol. 9 No. 2 (2013): Jurnal Biofisika" : 6 Documents clear
SENSOR SUHU BERBASIS BAHAN FERROELEKTRIK FILM Ba0,55 Sr0,45TiO3 (BST) BERBANTUKAN MIKROKONTROLER ATMEGA 8535 Ridwan Siskandar
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
Publisher : Jurnal Biofisika

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Abstract

Growth of pure Ba0.55Sr0.45TiO3 (BST) film on p-type silicon (100) substrates with two treatments on the enhancement and depletion (pretreatment of the substrate which is heated up to first at a temperature of 800°C for 15 hours before the spilled  solution BST) with the method Chemical solution Deposition (CSD) and spin coating at 3000 rpm  rotational  speed  for  30  seconds.  Films  (both  on  the  type  of  enha ncement treatment and type of deples treatment) in put on top of the substrate is then heated at a temperature of 800oC, 850oC and 900oC for 15 hours . Of BST film obtained was then carried out the characterization of the value range, sensitivity, resolution BST films, the level of accuracy and hysteresis.  Results showed that 850 oC enhancement BST  film  is  the  best  film  that  can  be  used  as  a  temperature  sensor  to  read  the changes in the environment (temperature only)  ATMega8535 based microcontroller. Output (voltage generated) amplified by differential amplifier circuit and non-inverting amplifier.  Subsequently  processed  into  digital  data  output  on  the  Analog  Digital Converter  (ADC)  internalATMega8535.  Digital  data  is  processed  by  the microcontroller.  Visualization  using  measuring  16x2  Liquid  Crystal  Display  (LCD) display which can change the voltagein units of degrees  celsius ( oC)  when given a BST film temperature stimuli
OPTIMASI KELAJUAN PEMANASAN PADA EKSTRAKSI SILIKON DIOKSIDA (SiO2 ) DARI SEKAM PADI , Masrur
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
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Abstract

According to Central Agency Statistics Indonesia,  production rice in 2012 will reach 69.05 million ton. Seeing this, it would appear the main agricultural waste generated from  rice,  the  rice  husk.  Rice  husk  ash  has  the  potential  to  produce  silica. Incineration process of rice husk was performed in a furna ce at temperature of 400oC for  2  hours  and  950oC  for  1  hour,  with  the  increase  rate  0.5oC/minute  and 1.5oC/minute.  The  incineration  yield  then  washed  with  Chloride  acid  3%  (12  mL Chloride  acid  3%  for  1  gram  of  rice  husk  ash)  and  heated  using  hotplate  and magnetic stirrer, with a speed of 240 rpm for 2 hours at 200oC. Furthermore sample washed repeatedly using hot distilled water until free acid using litmus papers, then reheated  in  a  furnace  to  produce  silica.  EDX  results  for  silicon  dioxide  of  about 99.15% (for increase rate 0.5 oC/minute) and 78.96% (for increase rate 1.5oC/minute). Characterization  of  the  silica  using  FTIR  spectroscopy  revealed  the  existence  of functional group (siloxane). Peaks of FT-IR spectrum showed specific peaks related to the present of SiO2 at the wave number range of 1.110 cm-1 to 467 cm-1
SEL SURYA HIBRID BULK HETEROJUNCTION NANOPARTIKEL ZnO/Cu-FEOFITIN . Sugianto
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
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Abstract

The  hybdrid  solar  cell  in  bulk-heterojunction  form  has  been  fabricated.  It  was combined among ZnO and chlorophyll derivatives (Cu-Pheophytin) and insertion of CuSCN layer as  hole conductor. The hybrid film of ZnO/Cu-pheophytin  has a wide absorption spectrum  compare with the  ZnO  film alone. The  characterization result of the  hybrid  film  of  ZnO/Cu-pheophytin  solar  cell  has  fill  factor  about  55%  which indicated an ideal  curve  of  I-V characteristic. Moreover, the  conversion  efficiency  of the cell was 0.3%.
X-RAY RADIOGRAPHIC STUDY OF β-TRICALCIUM PHOSPHATE BIOCERAMICS AS A TOOTH FILLER N.A. Nuzulia
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
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Abstract

Preservation of alveolar bone following tooth extraction is an  important step in dental practices before dental implant placement. This study reported the use of β-TCP as a tooth filler to maintain the desired alveolar ridge dimension and stimulate the bone healing processes in the area of tooth loss. The β-TCP used in this study is pure β-TCP made of chicken eggshells. The corresponding β-TCP was mixed with chitosan 2% to get β-TCP pellet for biocompatibility testing. Biocompatibility testing of β-TCP on  lower  incisor  was  performed  in  rabbits  and  sheep  as  animal  model.  Animal models  (rabbits  and  sheep)  implanted  with  β-TCP  demonstrated  the  expected results. The x-ray radiograph of rabbit’s jaw showed the formation of complete tooth and tooth growth at D+30 PO on alveolar socket. Moreover, the x-ray radiographs of sheep’s  jaw  indicated  no  change  on  mesiodistal  of  the  edentulous  area.  It  was obvious  that  the  corresponding  β-TCP  could  accelerate  the  formation  of  complete tooth on rabbit, minimize the postextraction bone loss and maintain the alveolar ridge dimension on sheep.
UJI SIFAT ELEKTRONIK FILM Bax Sr1-xTiO3 DENGAN METODE WERNER Endang Rancasa
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
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Abstract

In  this  study,  BaxSr1-xTiO3(BST)  films  were  grown  on  p-silicon  substrates  using chemical solution deposition (CSD) and were annealed at 850oC for 15 hours.  Then contact were made on its. Measurement of electrical properties has been observed using sourcemeter and then its were analyzed using werner method to extract seriesresistance and  ideality factor.  Then  value  of series  resistance  w as used  to  correct voltage data Vd. Then graphs of Vd – Ln I were analyzed to extract saturation current, barrier  potential  and  ideality  factor.  The  increasing  of  mol  fraction  of  Ba  caused increasing in saturation current and reduces value of series resistance, ideality factor and barrier potential.
STUDI ELEKTROKIMIA POLIANILIN KOMPOSIT ELEKTRODA PASTA KARBON , Suriyanti
Jurnal Biofisika Vol. 9 No. 2 (2013): Jurnal Biofisika
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Abstract

Polyaniline  is  widely  used  as  a  material  for  manufacturing  electrodes  such  as biosensor,  biofuel  cell,  and  supercapacitor  application  in  nanocomposite  forms.  In this study, polyaniline has been synthesized in emeraldyne salt forms by  interfacial polymerization  method  and  synthesized  nanocomposite  electrode  of  polyanilinecarbon paste. The polyaniline morphology was characterized by X  -  Ray Diffraction (XRD ) , Scanning Electron Microscopy ( SEM ), Transmission Electron Microscope (TEM)  and  Fourier  Transform  Infrared  (FTIR).  In  XRD  pattern  showed crystal type was  polyaniline  nanofiber  semicrystalline.  The  SEM  image  showed  polyaniline morphology  which  nanoparticle  formed.  The  TEM  result  estabilished  nano-size indicated  by  diameter  size  about  60 -80  nm,  FTIR  result  showed  that  polyaniline which synthesized was conductive polyaniline forms or called emeraldine salt (ES). Electrochemical  studies  showed  that  nanocomposite electrode of polyaniline-carbon paste  be  able  to  increased  the  ion  transfer  efficiency  in  the  composite  electrode. Voltammograms  of  nanocomposite  electrode  of  polyaniline-carbon  paste  seen  at  a potential  0,5V  aniline  oxidation  peaks  and  reduction  peaks  seen  at  -0.1  V  Both  of these curves peaks (oxidation and reduction was not observed clearly).

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