Formation of non bonded organic layer around inorganic particles like iron sulfide and zeolites, was hypothesized as starting point for one of the possible mechanisms of the origin of life on earth. In this study, the general circumstances needed for creation of such organic layer was investigated. An aliphatic hydrocarbon (hexane), an aromatic hydrocarbon (toluene), an alcohol (n-octanol) and ...

Organisms produce various organic/inorganic hybrid materials, which are called biominerals. They form through the self-organization of organic molecules and inorganic elements under ambient conditions. Biominerals often have highly organized and hierarchical structures from nanometer to macroscopic length scales, resulting in their remarkable physical and chemical properties that cannot be obta...

Compounds containing the -PO3H2 function, such as monoesters of phosphoric acid and phosphonic acids, specifically bind to aluminium oxide in aqueous solution under experimental conditions where non-phosphorylated compounds are completely desorbed. The bound organic phosphate can be specifically displaced by aqueous solution of inorganic phosphates thus allowing their separation or detection by...

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By C. A. SONDHAUS AND Bo THORELL D URING the growth and differentiation of erythroid cells, iron is incorporated and passes from the inorganic state into heme compounds, finally producing the normal hemoglobin complement of the mature red blood cell. It has been suggested’4 that the process presumably involves the chelation of iron by a protoporphyrinogen or reduced protoporphyrin. A heme-formi...

1CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua Campo Alegre 687, 4169-007 Porto, Portugal 2Department of Inorganic and Analytical Chemistry, Faculty of Chemical and Pharmaceutical Science, University of Chile, Casilla 233, Santiago, Chile 3Departamento of Molecular and Clinical Pharmacology, Faculty of Medicine, University of Chile, Santiago, Chil...

BACKGROUND Application of aminolevulinic acid (ALA) for photodynamic therapy induces significant sensitivity to visible light. OBJECTIVE To determine whether sunscreens containing inorganic agents are effective against sensitivity to blue light induced by ALA application. METHODS & MATERIALS Twenty subjects received application of ALA on the arm. Thirty minutes before blue light exposure, t...

The synthesis of iron oxide nanoparticles (NPs) by thermal decomposition of iron precursors using oleic acid as surfactant has evolved to a state-of-the-art method to produce monodisperse, spherical NPs. The principles behind such monodisperse syntheses are well-known: the key is a separation between burst nucleation and growth phase, whereas the size of the population is set by the precursor-t...

Fe-doped synthetic geomimetic chrysotile nanocrystals represent a reference standard to investigate the health hazard associated with asbestos fibers and constitute interesting inorganic nanotubes for specific technological applications in light harvesting systems, optoelectronics and photonics. As the fiber toxicity is catalyzed by iron ions in specific crystallographic sites and the mechanica...

By C. A. SONDHAUS AND Bo THORELL D URING the growth and differentiation of erythroid cells, iron is incorporated and passes from the inorganic state into heme compounds, finally producing the normal hemoglobin complement of the mature red blood cell. It has been suggested’4 that the process presumably involves the chelation of iron by a protoporphyrinogen or reduced protoporphyrin. A heme-formi...