Wool in carpets is formed by proteins, where many side chains are polar and ionisable, enabling wool to function as a polymeric ligand exchanger. This project has successfully bound either hydrated ferric oxide (HFO) nanoparticles (Figure 1) or a copper(II) salt onto waste carpet to form a sorbent material. The strongest binding was seen after first modifying the carpet by an alkaline oxidation...

BACKGROUND Iron is a vital nutrient for all cells, and malignant cells have a higher requirement for the metal due to their rapid multiplication. Bacterial siderophores can be used to reduce free ferric ion concentration from the cellular environment. METHODS In the present study, we have evaluated effect of three siderophores - exochelin-MS, mycobactin S and deferoxamine B on the proliferati...

The title complex, [Fe(2)(C(20)H(14)N(2)O(2))(2)O]·CH(4)O·2H(2)O, is composed of μ-oxido-bridged ferric 2,2'-[o-phenylene-bis(nitrilo-methylidyne)]diphenolate (salphen) dimers, one methanol mol-ecule and two H(2)O mol-ecules. Each iron(III) ion, surrounded by two coordinating N and O atoms from the salphen ligand and one bridging O atom, shows a five-coordinate square-pyramidal geometry. One of...

In an attempt to decrease ascorbate interference on the ion-chromatographic determination of urinary oxalate, we compared the effectiveness of four different methods for ascorbate elimination by analyzing a representative urine pool supplemented with successive ascorbate additions. Two of the methods--treatment with ferric ions or boric acid--have been described elsewhere; treatments with nitri...

Cytochrome P450 (CYP) is a heme containing enzyme superfamily that catalyzes the oxidative biotransformation of lipophilic substrates to hydrophilic metabolites facilitating their removal from cells. The CYPs were first recognized by Martin Klingenberg (Klingenberg, 1958) while studying the spectrophotometric properties of pigments in a microsomal fraction prepared from rat livers. When a dilut...

The potentiometric method was applied to the study of the influence of cyanide and of hydroxyl ion on methemoglobin. Both of these ions appear to combine with the iron of the methemoglobin molecule and reduce its oxidant activity. From the magnitude of the effect produced by cyanide and by variation in pH on the oxidation-reduction potential of the methemoglobin-hemoglobin system, it is conclud...

In the performance of routine determinations of serum chloride by the automated method, which depends on halide displacement of mercury from the thiocyanate to allow formation of ferric thiocyanate complex, 4 cases of bromide poisoning were detected. Experimental evidence shows the halide substitution to be an equilibrium, with higher formation constants for the heavier halide ions. As a result...

Mammalian nonheme iron absorption requires reduction of dietary iron for uptake by the divalent metal ion transport system in the intestine. This was thought to be mediated by duodenal cytochrome b (Cybrd1), a ferric reductase enzyme resident on the luminal surface of intestinal absorptive cells. To test its importance in vivo, we inactivated the murine Cybrd1 gene and assessed tissue iron stor...

conclusions ferric chloride is an effective haemostatic agent in controlling liver parenchymal tissue hemorrhage in an animal model. results the hemostasis time of ferric chloride concentration groups was significantly less than that of the control group (p value < 0.001). the pathologic examination showed the highest frequency of low grade inflammation based on the defined pathological grading...