www.sciencemag.org SCIENCE VOL 337 28 SEPTEMBER 2012 1575 COVER A biodegradable integrated circuit (length: ~2.54 centimeters) shown partially dissolved by a droplet of water. This demonstration system includes transistors; diodes; inductors and capacitors, with magnesium for the electrodes/interconnects; magnesium oxide for the gate/interlayer dielectrics; silicon nanomembranes for the semicon...

In the last years biologically stable biomaterials gives their place to biodegradable biomaterials in packaging, agriculture, medicine, and other application areas. For applications in medicine this happens because of the some problems caused by the regeneration ability of the living tissues and toxic effect of stable polymers. By products of biodegradable polymers leaves no residual mass at th...

Continuous urbanization and modernization have increased the burning of fossil fuels to meet energy needs across globe, emanating environmental pollution depleting fuels. Therefore, a shift towards sustainable renewable is necessary. Several techniques exploit biomass yield are trending, with pyrolysis one them. Usually, single feedstock employed in for anoxygenic generation biochar together bi...

A starch-urea-based biodegradable coordination polymer modified by transition metal Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) was prepared by polycondensation of starch and urea. All the synthesized polymeric compounds were characterized by Fourier transform-infrared spectroscopy (FT-IR), (1)H-NMR spectroscopy, (13)C-NMR spectroscopy, UV-visible spectra, magnetic moment measurements, different...

Biodegradable stents are increasingly being used for benign oesophageal conditions that include refractory strictures and perforations. Acute oesophageal necrosis has been reported with various other conditions but none due to the insertion of biodegradable stents. A 58-year-old male presented as an acute emergency in severe haemodynamic shock. Investigations confirmed an oesophageal perforatio...

Biodegradable materials are developed for designing temporary medical implants, like fixation devices for fractured bones or stents. At present, polymeric biomaterials such as poly-lactic acid (PLA) are currently used in these applications. The disadvantage of polymers is a low mechanical strength, hardness and wear resistance that is the main limitation for the use in load-bearing implants. Fo...

We report the self-assembly of a biodegradable platinum nanoparticle-loaded stomatocyte nanomotor containing both PEG-b-PCL and PEG-b-PS as a potential candidate for anticancer drug delivery. Well-defined stomatocyte structures could be formed even after incorporation of 50% PEG-b-PCL polymer. Demixing of the two polymers was expected at high percentage of semicrystalline poly(ε-caprolactone) (...

BACKGROUND In Europe, numerous dermal fillers have been utilized for the past decade. A lot of drawbacks have been reported and sometimes, severe complications occurred. OBJECTIVE Our purpose is to report the clinical aspects of the adverse reactions following injections of some of the dermal fillers. Histological aspects of complications are also described. RESULTS Adverse reactions second...