Group HD, that is 28b and 33% TS batch tests, was characterized by very low hydrogen production, low hydrogen/gaseous product ratio, and slow fermentation rates requiring 8 days to reach the maximum hydrogen productivity.
Acetate production was only impaired when acetate was present in the medium (CM1), but in both CGM and CM1, an altered initial acetate/butyrate product ratio was observed showing a reduced acetate production rate.
Meanwhile, Greece's debt to gross domestic product ratio keeps rising.
If Japan's debt-to-gross domestic product ratio of 200 percent can't pull its economy out of the quagmire, why should America be any different?
Add to this a three-year electricity crisis, rising public spending and debts of 90bn cedis (£16bn) – giving Ghana a debt-to-gross domestic product ratio of more than 70% – and it is clear why one of Africa's most stable countries is in trouble, and why political leaders are fretting about their future.
The Taxing Times research paper by the progressive thinktank's senior economist, Matt Grudnoff, finds that if the tax to gross domestic product ratio had stayed at 23.9% (the average between 2000 and 2008), the budget would only have been in deficit for two years before returning to surplus.
In part, this is because most countries are fiscally stretched and even Germany, with a debt-to-gross domestic product ratio above 80 percent, is reaching the limits of its check-writing ability.
What about the fact that by some estimates the debt-to-gross domestic product ratio is approaching the 90 percent threshold identified by Carmen Reinhart and Kenneth Rogoff as likely to reduce growth by a percentage point a year?
California's debt-to-gross state product ratio is just 5 percent -- minuscule compared with the Greek debt-to-G.D.P. level of 133 percent, as estimated by JPMorgan, or even the United States government's 88 percent.
After all, despite Japan's highest debt-to-gross-domestic- product ratio, and less-than-stellar debt ratings — a couple rungs below even the downgraded United States — Japanese bond yields remain the lowest among advanced economies.
