Differences in experimental conditions such as duration of the experiment, age and gender of the animals, Si source and route of administration, as well as overall nutritional compositions of the basal diet may all contribute to the inter-experimental variance.
That government was also headed to financial ruin after Egypt closed smuggling tunnels under its shared border, cutting off a crucial source of the Hamas administration's revenue.
One additional source of the Obama administration's problems -- one that extends well beyond its difficulties with progressives -- is the widespread perception that its policies have often taken the side of Wall Street over the interests of ordinary people.
There was no restriction on source of BTX-A, dose of administration, injection sites or number of injections.
Farm owners were asked to provide details information on various antimicrobial drugs used within the last three months, including (i) method of administration, (ii) source of prescription, (iii) reasons for use, (iv) withdrawal period.
The fact that many rules have not been completed so long after Lehman's failure could be a source of embarrassment to the administration and regulators.
The construction industry in general has been a persistent source of problems for the administration of Mayor Michael R. Bloomberg, who has been an aggressive champion of development over the course of his two terms.
Mr. McClellan did not specifically cite the Justice Department as the source of the information, but administration officials said it was the department that had informed the White House of the investigation.
Over the last year, he adds, a new source of hostility to his administration has reared its head – from people within Labour whose interpretation of it as an "anti-austerity party" sees them protesting against Labour councils.
Nevertheless, at the White House on Tuesday, President Bush sought to play down the role of Mr. Chalabi and his group as a source of information in his administration's decision to go to war in Iraq.
