A live-step sequential extraction technique was used to determine the partitioning of Cr, Mn, Fe, Cu, Zn, Cd, and Pb among the operative sedimentary phases (exchangeable ions, carbonates, manganese and iron oxides, sulfides and organic matter. and residual minerals) in coastal sediment from three locations in the southwest Iberian Peninsula. Two sites are located close to industrial areas, the ...

Abstract We investigate the distribution of various fractions phosphorus (P) in sediments at coastal area Semarang City. Samples were collected from thirteen locations Banjir Kanal Barat, port and Timur. Sedimentary parameters such as sand, silt, clay, organic carbon analysed order to find out their relation with P fractions. The sediment types are predominantly sandy silty low clay content. Am...

We report here on the development and application of a submersible, compact, low power consumption, integrated multichannel trace metal sensing probe (TracMetal). This is unique in that it allows high-resolution, simultaneous in-situ measurements potentially bioavailable (so-called dynamic) fraction Hg(II), As(III), Cd(II), Pb(II), Cu(II), Zn(II). The TracMetal incorporates nanostructured Au-pl...

The submicrometric fraction of surface sediments that accumulate in the bottom dam reservoirs represent important sources nutrients and contaminants freshwater systems. However, assessing their stability presence sediment bacteria as well bioavailability remains poorly understood. We hypothesized sediment’s are able to extract from sedimentary colloids (<1 µm fraction) thus contribute releas...

The effect of the dosing vehicle (e.g., dough) on the ability of an in vitro gastrointestinal (IVG) method to predict relative bioavailable Pb associated with soil ingestion was evaluated. Bioaccessible Pb determined by the IVG method was compared with relative bioavailable Pb measured from dosing trials using juvenile swine for 18 contaminated soils ranging from 1270 to 14200 mg Pb kg(-1). Bio...

Soil ingestion by children is an important pathway in assessing public health risks associated with exposure to arsenic-contaminated soils. Soil chemical methods are available to extract various pools of soil arsenic, but their ability to measure bioavailable arsenic from soil ingestion is unknown. Arsenic extracted by five commonly used soil extractants was compared with bioavailable arsenic m...

Communicated by Joseph DePinto Harmful algal blooms (HABs) have increased in frequency and magnitude in western Lake Erie and spring phosphorus (P) load was shown to be a key driver of bloom intensity. A recently developed Bayesian hierarchical model that predicts peak bloom size as a function of Maumee River phosphorus load suggested an apparent increased susceptibility of the lake to HABs. We...

OBJECTIVE Testosterone stimulates erythropoiesis and thus glycated hemoglobin (A1C) values may be relatively low in male diabetic patients with hypogonadism. We therefore investigated relationships between serum bioavailable testosterone concentration and the ratio of glycated albumin (GA) to A1C and between serum bioavailable testosterone and hemoglobin concentrations in men with type 2 diabet...

OBJECTIVE Some evidence suggests an inverse association between type 2 diabetes and androgens in men and a positive association between type 2 diabetes and androgens in women. The purpose of this community-based study was to evaluate sex differences in the association between endogenous total and bioavailable estrogen and testosterone levels and glucose tolerance status. RESEARCH DESIGN AND M...

Objective: Testosterone stimulates erythropoiesis and thus glycated hemoglobin (HbA1c) values may be relatively low in male diabetic patients with hypogonadism. We therefore investigated relationships between serum bioavailable testosterone concentration and the ratio of glycated albumin (GA) to HbA1c as well as between serum bioavailable testosterone and hemoglobin concentrations in men with t...