We reveal that the aragonite CaCO3 platelets in nacre of Haliotis laevigata are covered with a continuous layer of disordered amorphous CaCO3 and that there is no protein interaction with this layer. This finding contradicts classical paradigms of biomineralization, e.g., an epitaxial match between the structural organic matrix and the formed mineral. This finding also highlights the role of ph...

Insights into past marine carbon cycling and water mass properties can be obtained by means of geochemical proxies calibrated through controlled laboratory experiments with accurate seawater carbonate system (C-system) manipulations. Here, we explored the use strontium/calcium ratio (Sr/Ca) calcite shells benthic foraminifera as a potential C-system proxy growth experiment two deep-sea species ...

AIM OF THE STUDY To evaluate the anti-leishmanial activity and cytotoxicity of aqueous and organic extracts of ten plants used in Mexican traditional medicine as anti-parasitics. MATERIALS AND METHODS For the organic extracts, plant material was macerated in dichloromethane (CH2Cl2) and dichloromethane/methanol (CH2Cl2/MeOH) (1:1) during two weeks; the aqueous extracts were prepared by infusi...

10.1128/CDLI.10.5.934-939.2003. 2003, 10(5):934. DOI: Clin. Diagn. Lab. Immunol. Sarrot-Reynauld Gaudin, Bernard Imbert, Christian Massot and Françoise Josiane Arvieux, Chantal Dumestre-Pérard, Philippe Christian Drouet, Marie-France Nissou, Denise Ponard, Antibodies and Rheumatoid Factors Minimal Interference with Antinuclear Assay Using Antigens from Cell Lysate: by an Enzyme-Linked Immunosor...

This is the first report for Iran of Dolichogenidea laevigata (Ratzeburg, 1848) (Hymenoptera: Braconidae: Microgastrinae) parasitizing larvae European leaf roller Archips rosana (Linnaeus, 1758) (Lepidoptera: Tortricidae). The parasitized A. were obtained from different host plants. occurrence D. and its diagnosis are presented. In addition, a full DNA barcode (the mitochondrial cytochrome oxid...

Biofilm is a complex microbial community highly resistant to antimicrobials. The formation of biofilms in biotic and abiotic surfaces is associated with high rates of morbidity and mortality in hospitalized patients. New alternatives for controlling infections have been proposed focusing on the therapeutic properties of medicinal plants and their antimicrobial effects. In the present study the ...

Oxidative stress-induced neuronal death has an important role in the pathogenesis of neurodegenerative disorders. The effects and mechanisms of action of the total flavonoids (TFs) from Rosa laevigata Michx fruit against hydrogen peroxide (H2O2)-induced oxidative injury in PC12 cells were investigated in this study. The results demonstrated that the TFs protected against cell apoptosis, DNA and...