Comparison of Barium and Arsenic Concentrations in Well Drinking Water and in Human Body Samples and a Novel Remediation System for These Elements in Well Drinking Water.

Health risk for well drinking water is a worldwide problem. Our recent studies showed increased toxicity by exposure to barium alone (≤700 µg/L) and coexposure to barium (137 µg/L) and arsenic (225 µg/L). The present edition of WHO health-based guidelines for drinking water revised in 2011 has maintained the values of arsenic (10 µg/L) and barium (700 µg/L), but not elements such as manganese, iron and zinc. Nevertheless, there have been very few studies on barium in drinking water and human samples. This study showed significant correlations between levels of arsenic and barium, but not its homologous elements (magnesium, calcium and strontium), in urine, toenail and hair samples obtained from residents of Jessore, Bangladesh. Significant correlation between levels of arsenic and barium in well drinking water and levels in human urine, toenail and hair samples were also observed. Based on these results, a high-performance and low-cost adsorbent composed of a hydrotalcite-like compound for barium and arsenic was developed. The adsorbent reduced levels of barium and arsenic from well water in Bangladesh and Vietnam to <7 µg/L within 1 min. Thus, we have showed levels of arsenic and barium in humans and propose a novel remediation system.

Effects of an off-site walking program on fibrinogen and exercise energy expenditure in women.

PURPOSE: Increased fibrinogen levels may trigger cardiac events in patients with atherosclerosis. Early control of fibrinogen levels before the progression of atherosclerosis that occurs with aging and menopause may benefit women, but the effects of exercise on fibrinogen levels as a preventive value have not been examined in early to middle adulthood women with lack of regular exercise. The present study aims to identify the effect of an off-site walking-based exercise program on fibrinogen levels in such women. METHODS: A prospective, 12-week, randomized and controlled study was used. Fifty-two women aged 32 to 57 years who did not exercise regularly or exercised with a weak intensity level were randomly assigned to either an intervention group (IG, n = 26) or a control group (CG, n = 26) for a 12-week study. Exercise energy expenditure (EEE) was measured using a microelectronic device. Fibrinogen levels were assessed using the clotting time method before and after the exercise program. RESULTS: The mean change from baseline EEE was 1.17 ± 0.98 kcal/kg/day in IG subjects (n = 24) and 0.46 ± 0.68 kcal/kg/day in CG subjects (n = 25), a 30% difference between groups (p = .01). The mean change in fibrinogen levels was -8.0 ± 34.5 mg/dl (3% decrease) in IG subjects (n = 24) and -3.6 ± 40.0 mg/dl (1% decrease) in CG subjects (n = 25). No significant difference in fibrinogen levels was seen between groups (F = 1.179, p = .279). CONCLUSION: EEE increased significantly, but fibrinogen levels did not decrease significantly. The effects of a 12-week off-site walking program on fibrinogen levels were inconclusive. As implications for nursing practice, our findings have suggested fibrinogen levels are not a novel cardiovascular risk factor any more, and provide important information on safe exercise to minimize adverse effects from fibrinogen arising from exercise intensity, especially in women with advanced atherosclerosis when nurses increase exercise intensity levels. Further studies with larger sample sizes in women to confirm the effect of exercise on reducing fibrinogen levels are necessary.

Effects of an off-site walking program on energy expenditure, serum lipids, and glucose metabolism in middle-aged women.

The present study aims to identify the effects of systematic walking on exercise energy expenditure (EEE) and blood profiles in middle-aged women. Fifty-two female nurse managers, aged 32 to 57 years (42.0 +/- 6.2), were randomly assigned to an intervention group (IG) and a control group (CG) for a 12-week study of the walking program. EEE was measured using a microelectronic device. Blood profiles were assessed before and after the walking program. The mean EEE (kcal/kg/d) in the IG and CG was 4.73 +/- 1.02 and 3.88 +/- 0.81 (P = 0.01), indicating an increase of 1.17 +/- 0.98 and 0.46 +/- 0.68 from baseline (P = 0.01), respectively. The mean change in high-density lipoprotein cholesterol in the IG and CG was 1.8 +/- 8.3 mg/dL and -2.9 +/- 7.0 mg/dL (P = 0.051); that in insulin was -4.5 +/- 7.5 microU/dL and -0.6 +/- 4.3 microU/dL (P = 0.046), respectively. These results show that systematic walking increases EEE and improves blood profiles.