Sorbent material based on a novel thiosemicarbazone compound, C H N S, was prepared by 12 18 4 immobilizing the ligand into gel matrix (SG). The SG sorbent was characterized by FT-IR, EDX, SEM, TEM and TGA. The competitive sorption characteristics of eight transition metal ions (Ag , Cu , Co , Ni , Fe , Pb , Zn + 2+ 2+ + 3+ 2+ 2+ and Mn ) using batch method was studied using atomic absorption s...

The biosorption of arsenic (V) on nine chemically modified biomasses (with iron oxide coated) of mycelia fungi: Aspergillus flavus III, IV and V, Aspergillus fumigatus I-II, Paecilomyces sp., Cladosporium sp., Mucor sp-1 and 2 was studied in this work. This study provides evidence that the biomasses of the fungi A. flavus, IV, III and V, Paecilomyces sp., and A. fumigatus I were very efficient ...

We describe a simple fluorometric method for determining aluminum in serum samples by monitoring the rate of reaction of 2-hydroxy-1-naphthaldehyde-p-methoxybenzoylhydrazone with aluminum ions. The emission of the resulting fluorescent metal-chelate formed is measured at 475 nm. Aluminum was measured in the supernate of serum after proteins were removed by precipitation with concentrated nitric...

Iron levels in the healthy human brain are known to be high in certain areas such as the substantia nigra (SN), and increase further with age. In addition, there is some evidence for a further increase in iron load in the SN of Parkinson's disease (PD) patients as compared to controls, which correlates with motor disability. Here, we have analyzed total iron levels in cells as well as mouse and...

Galinobisuitite thin films of (Bi2S3)(PbS) were prepared using the chemical bath deposition technique (CBD). Thin films were prepared by a modified chemical deposition process by allowing the triethanolamine (TEA) complex of Bi(3+) and Pb(2+) to react with S(2)- ions, which are released slowly by the dissociation of the thiourea (TU) solution. The films are polycrystalline and the average cryst...

An injection method has been adapted for the determination of copper concentration in untreated, undiluted serum by flame atomic absorption spectroscopy. Serum, 50 or 100 microliter, is automatically injected by a commercial microprobe system into a plastic cone connected to the capillary tube of the burner, at a rate of 240 samples per hour. The required sample volume is considerably decreased...

First posted June 24, 2021 For additional information, contact: Director, Alaska Science CenterU.S. Geological Survey4210 University DriveAnchorage, 99508 Geochemical data are presented for more than 1,500 archived stream-sediment samples and accompanying quality control samples. The sediments were reanalyzed to improve the stream geochemical dataset support ongoing U.S. Survey (USGS) studies. ...