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Articles by A. Shokuhi Rad
Total Records ( 5 ) for A. Shokuhi Rad
  A. Shokuhi Rad
  The target of current study was to organize and distinguish panretin-loaded nanocapsules in addition to assess manipulate of this nanoencapsulation on panretin photostability. panretin-loaded nanocapsules (0.6 mg mL-1) were organized by interfacial deposition of polymer (poly-ε-caprolactone) by means of sunflower seed oil. Panretin-loaded nanocapsules obtainable drug content near to the conjectural value, encapsulation efficiencies higher than 99.5%, nanometric mean size with a polydispersity directory underneath 0.20 and pH values flanked by 5.1 and 6. 8. Concerning photodegradation schoolwork, panretin solution demonstrated a half-life time approximately 35 min along with a first order equation, while panretin nanocapsule suspensions demonstrated a half-life flanked by 70 and 95 min consistent with a zero order equation. Panretin-loaded nanocapsules enhanced panretin photostability, separately on the sort of oily used phase and represent a potential system to be included in contemporary or systemic dosage forms included panretin.
  A. Shokuhi Rad
  A responsive electrical detection technique of nucleic acids has been demonstrated on submicrogapped biosensor. This method contain immobilizing of Peptide Nucleic Acid (PNA) probes in the gap areas of a pair of interdigited microelectrodes and subsequently hybridizing with their complementary target RNA. After hybridization, hemin molecules were introduced into the RNA strand via zirconium-phosphate and zirconium-carbonate chemistries. The newly attached hemin molecules act as a catalyst to accelerate reducing ammoniacal Ag ion to form Ag nanoparticles, which span the gap of the interdigitated microelectrode. The conductance of the Ag nanoparticles directly correlated with the number of the hybridized RNA molecules. Nearly 1 fM sensitivity was achieved under optimal conditions.
  A. Shokuhi Rad
  A responsive electrical detection technique of nucleic acids has been demonstrated on submicrogapped biosensor. This method contain immobilizing of Peptide Nucleic Acid (PNA) probes in the gap areas of a pair of interdigited microelectrodes and subsequently hybridizing with their complementary target RNA. After hybridization, hemin molecules were introduced into the RNA strand via zirconium-phosphate and zirconium-carbonate chemistries. The newly attached hemin molecules act as a catalyst to accelerate reducing ammoniacal Ag ion to form Ag nanoparticles, which span the gap of the interdigitated microelectrode. The conductance of the Ag nanoparticles directly correlated with the number of the hybridized RNA molecules. Nearly 1 fM sensitivity was achieved under optimal conditions.
  A. Shokuhi Rad
  In current study, it was reported the investigational manner to manage the construction of 80 nm, organically capped, platinum (Pt) nanoparticles by means of variation the deposition conditions. Two dissimilar deposition techniques were used to assess the authority of the NP solution volume. By means of drop casting technique, much liquid was worked, resulting in a ventilation time of about 100 sec, whereas the piezodropper system create tiny drops, in such a way that the solvent evaporates in few seconds and NPs do not have adequate time to aggregate in wider area. A improved control on the location of NPs on the substrates can be attained by means of the piezodropper system, which facilitates the assembly of hundreds of nanometers wide 2D area.
  A. Shokuhi Rad
  Desmodur Z4470 having isocyanate group was used to find optimum formulation of Polyurethane (PU) having self-healing property, with different desmophens as polyalcohol: desmophen 670 BA, desmophen 1800 and desmophen A 665 both in the present and absent of ethylene glycol as the chain extender agent. The obtained results showed that a hard polymer coating is obtained using desmophen A665 polyalcohol in the absence of any chain extender, however a corrosion resistant and transparent coating is obtained using desmophen 1800 and a ratio of NCO/OH = 2 for prepolymer formation stage and NCO/OH = 0.85 in polymerization stage by adding proper amount of ethylene glycol. This obtained PU shows the best self-healing properties.
 
 
 
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