Search results for "iron [calorimeter]"
showing 10 items of 504 documents
A comparative study of the physicochemical properties of iron isomaltoside 1000 (Monofer®), a new intravenous iron preparation and its clinical impli…
2011
Abstract The treatment of iron deficiency anemia with polynuclear iron formulations is an established therapy in patients with chronic kidney disease but also in other disease areas like gastroenterology, cardiology, oncology, pre/post operatively and obstetrics’ and gynecology. Parenteral iron formulations represent colloidal systems in the lower nanometer size range which have traditionally been shown to consist of an iron core surrounded by a carbohydrate shell. In this publication, we for the first time describe the novel matrix structure of iron isomaltoside 1000 which differs from the traditional picture of an iron core surrounded by a carbohydrate. Despite some structural similaritie…
Structural characterization of iron oxide/hydroxide nanoparticles in nine different parenteral drugs for the treatment of iron deficiency anaemia by …
2013
Drug products containing iron oxide and hydroxide nanoparticles (INPs) are important for the treatment of iron deficiency anaemia. Pharmaceuticals prepared by the complexation of different kinds of INPs and carbohydrates have different physicochemical and biopharmaceutic characteristics. The increasing number of parenteral non-biological complex drugs (NBCD) containing iron requires physicochemical methods for characterization and enabling of cross comparisons. In this context the structure and the level of crystallinity of the iron phases may be connected to the in vitro and in vivo dissolution rates, which etiologically determine the therapeutic and toxic effects. X-ray powder diffraction…
Functionalized Fe3O4 nanoparticles: influence of ligand addition sequence and pH during their continuous hydrothermal synthesis
2015
In this study we report various new efficient ways to synthesize and modify in situ magnetite (Fe3O4) iron oxide nanoparticles (NPs). Thanks to an apparatus especially developed for this new method of grafting, the NPs have been synthesized and functionalized by 3,4-dihydroxyhydrocinnamic acid (DHCA) or 3,4-dihydroxy-L-phenylalanine (LDOPA) in one step and under hydrothermal conditions using varying concentration ratios ([organic molecules]/[ferrous and ferric ions]). The organic molecules were added before or after the NP synthesis. The addition of these organic molecules modifies the structure, the morphology, the oxidation degree and the growth of the crystallites. Adding the organic mol…
Der Einfluss kondensierter Phosphate auf die Eisen-Resorption
1959
Es sollte untersucht werden, ob die kondensierten Phosphate Tetranatriumpyrophosphat, Natriumtripolyphosphat, Hexametaphosphat, Kaliummetaphosphat und Plasmal die Eisenresorption beeintrachtigen. Als Masstab fur diesselbe galten die Hamoglobin- und Erythrocytenregeneration und die Gewichtszunahme anamischer Ratten. Die Anamie wurde durch Phenylhydrazinhydrochlorid-Injektionen bzw. eine eisenarme Ernahrung (Milchdiat) hervorgerufen. Bei den herrschenden Versuchsbedingungen konnte ein nachteiliger Einflus der getesteten Substanzen auf die Eisenresorption nicht nachgewiesen werden. Auf Grund dieser Versuche und allgemeiner Uberlegungen wurde geschlossen, das dies uberhaupt unter physiologische…
Iron oxide/oleic acid magnetic nanoparticles possessing biologically active choline derivatives
2018
Abstract In recent years, synthetic magnetic nanoparticles have made a major contribution to biomedicine. Interest in iron oxide magnetic nanoparticles conditioned by the fact that they are nontoxic, and possess the unique opportunity to deliver medicines to certain organs by external magnetic field. We have developed a synthetic procedure, which is based on binding of the first biologically active substance with the magnetic core, and subsequent immobilization of another biologically active substance (ligand) on the modified surface of nanoparticles thus creating plasma membrane-like structures. Using the proposed methodology, we have obtained new nontoxic magnetic nanoparticles, functiona…
Room Temperature Magnetism in Layered Double Hydroxides due to Magnetic Nanoparticles
2013
Some recent reports claiming room temperature spontaneous magnetization in layered double hydroxides (LDHs) have been published; however, the reported materials cause serious concern as to whether this cooperative magnetic behavior comes from extrinsic sources, such as spinel iron oxide nanoparticles. The syntheses of crystalline Fe(3+)-based LDHs with and without impurities have been developed, highlighting the care that must be taken during the synthetic process in order to avoid misidentification of magnetic LDHs.
Iron-Catalyzed C(sp2)–C(sp3) Cross-Coupling of Aryl Chlorobenzoates with Alkyl Grignard Reagents
2020
Aryl benzoates are compounds of high importance in organic synthesis. Herein, we report the iron-catalyzed C(sp2)&ndash
The interaction of native DNA with iron(III)- N ,N'-ethylene-bis(salicylideneiminato)-chloride.
2004
Abstract The interaction between native calf thymus deoxyribonucleic acid (DNA) and Fe III - N , N ′ -ethylene-bis (salicylideneiminato)-chloride, Fe(Salen)Cl, was investigated in aqueous solutions by UV–visible (UV–vis) absorption, circular dichroism (CD), thermal denaturation and viscosity measurements. The results obtained from CD, UV–vis and viscosity measurements exclude DNA intercalation and can be interpreted in terms of an electrostatic binding between the Fe(Salen) + cation and the phosphate groups of DNA. The trend of the UV–vis absorption band of the Fe(Salen)Cl complex at different ratios [DNA phosphate ]/[Fe(Salen)Cl] and the large increase of the melting temperature of DNA in …
Revealing Iberian woodcraft: conserved wooden artefacts from south-east Spain
2010
18 páginas, 6 figuras, 3 tablas.
Submersed in the water, buried in the ground: comparative studies on metal assemblages and single finds from french Iron Age non-funerary contexts (V…
2020
Metal hoards are emblematic discoveries of European protohistoric societies and therefore an extremely dynamic research theme. However, even though there are many synthetic studies concerning Bronze Age practices, they are much less frequent concerning Iron Age deposits. In fact, since 1995 (Kurz 1995), no synthetic inventory on this subject had been carried out despite the regular increase in the number of discoveries since the development and multiplication of preventive archaeological excavations. Under these conditions, it seemed important to update the data and this led to the completion of a master's degree on this subject in 2011 (Le Cozanet 2011). Since then, our research hasn‘t cea…