2008 NOV 24 - (VerticalNews.com) -- According to recent research from Jinzhou, People's Republic of China, "Two novel metal-organic frameworks [Zn-2(Dpq)(2)(2,5-pda)(2)(H2O)(2)]center dot 2H(2)O (1) (dipyrazino[2,3-f:2'3'-h]quinoxaline=Dpq) and [Cd-2(Dpq)(2)(2,5-pda)2]center dot 2H(2)O (2) (pyridine-2,5-dicarboxylic acid=2,5-H(2)pda) have been obtained from hydrothermal reactions of two different metal(II) nitrates with the same mixed ligands Dpq and 2,5-H(2)pda, and structurally characterized by elemental analyses, TG, IR spectroscopy, and single-crystal X-ray diffraction analyse. Single-crystal X-ray analyses show that the metal ions are bridged by different coordination modes of 2,5-pda to form a dimer in 1, 2D rhombic grid in 2, respectively. ...read more

  2008 NOV 24 - (VerticalNews.com) -- "Hydroxylpropyl-beta-cyclodextrin (HP-beta-CD) was introduced to the surface of magnetic nanoparticles in the presence of NH3 center dot H2O to synthesize magnetic HP-beta-CD composite nanoparticles, which were used as a carrier in magnetic targeted drug delivery. The composite nanoparticles were characterized by FTIR, ICP-AES, TEM and VSM," scientists in Xian, People's Republic of China report.

  "The results showed that the iron content in the composite nanoparticles was 55.4%. The range of size is 10-20 nm and the magnetization is 59.9 emu/g. The capacity of composite nanoparticles for doxorubicin adsorption is 87.8 mu g/mg after incubation for 72 h. The cumulative percentage of released doxorubicin in PBS buffer (pH=7.4) in 1, 4, 10 d were 35.5%, 49.3% and 76.5%, respectively," wrote H. Zhang and colleagues ...read more

  2008 NOV 10 - (VerticalNews.com) -- According to recent research published in the journal Chemistry Letters, "Nanosized epsilon-Fe2O3 crystals with a diameter below 20 nm were successfully prepared at 600 degrees C in a mesoporous Silica matrix."

  "The formation of the metastable iron oxide Occurred through nanoscale segregation in an immiscible SiO-Fe2O3 system having a mesoporous structure," wrote K. Mori and colleagues, Keio University ...read more