Daily Archives: June 28, 2011

Snowpack Continues to Feed Missouri Flooding

I thought global climate change (warming) is supposed to be causing less snow, not more. But according to the Corps of Engineers, the Rocky Mountains ended winter topped by snowpack that was 140 percent of the average. About 29 percent remains, but it represents 38 to 40 percent of the snowpack in a typical year.

Click here for the news article.

 

 

Poirier et al 2011: Aluminum in Drinking Water and Neurodevelopmental Toxicity

Poirier, J., Semple, H., Davies,J., Lapointe, R. Dziwenka, M., Hiltz, M., Mujibi, D. 2011. Double-blind, vehicle-controlled randomized twelve-month neurodevelopmental toxicity study of common aluminum salts in the rat. Neuroscience. 2011 Jun 12.

Douglas Mental Health University Institute, Verdun, QC, H4H 1R3, Canada; McGill University, Montreal, QC H3A 2B4, Canada.

Abstract (Nat. Library of Medicine)

This good laboratory practice (GLP) study of aluminum salts in Sprague-Dawley rats was conducted according to double-blind, vehicle-controlled randomized design by exposing offspring to aluminum citrate in-utero, through lactation, and then in drinking water post-weaning.

Three dose levels were used: 30, 100, 300 mg Al/kg bw/day, in addition to control groups that received either water or a sodium citrate solution (27.2 g/L). Endpoints were assessed in both female and male pups: behavioral (motor activity, T-maze, auditory startle, the Functional Observational Battery (FOB) with domains targeting autonomic function, activity, neuromuscular function, sensimotor function, and physiological function), cognitive function (Morris swim maze), brain weight, clinical chemistry, hematology, tissue/blood levels of aluminum and neuropathology.

The most notable treatment-related effect observed in the offspring was renal pathology, most prominently in the male pups. Higher mortality and significant morbidity were observed in the male pups in the high Al-citrate dose group; leading to euthanization of this group at day 89. There was evidence for dose-response relationships between neuromuscular measurements-hind-limb and fore-limb grip strength-and Al-treatment in both males and females, although some of the effects may be secondary to body weight changes.

No consistent treatment-related effects were observed in ambulatory counts (motor activity) in the different cohorts. No significant effects were observed for the auditory startle response, T-maze tests (pre-weaning day 23 cohort) or the Morris water maze test (day 120 cohort). None of the lesions seen on histopathological examination of brain tissues of the day 364 group was reported as treatment-related and, as these were also seen in the control group, were likely due to aging.

In conclusion, these results indicate that concentrations of aluminum in the drinking water that are required to produce minimally detectable neurobiological effects in the rat are about 10,000 times higher than what is typically found in potable drinking water.

Click here for the abstract (free) and paper (fee).

 

 

11 Analytical Methods Approved by USEPA

USEPA evaluated 11 testing methods for contaminants listed in the regulations and determined them to be as effective as methods already established in the regulations for those contaminants. Streamlined approval authority was used to make the 11 optional, alternative methods available. The methods are:

Click here for the June 24, 2011 Federal Register notice.

Click here for the EPA fact sheet.

Salmonella Warning Issued for Alfalfa Sprouts

New warning issued for Salmonella:

Click here for the CDC analysis.

Click here for a news article on the warning.

Drinking water is typically targeted as the cause of such illnesses, when in reality foodborne illnesses are by far more common.

 

Empirical Evidence Shows Global Cooling

Climate predictions by the International Panel on Climate Change (IPCC) have relied on general circulation models resulting in various predictions of future global warming.  The empirical data, however, is showing just the opposite.

Click here for a discussion of recent global temperature data trends. 

Click here for thoughtful analysis showing that more floods may be expected in the future due to cooling.