Among the most impressive postclose gainers Wednesday, amid overall mixed trading, was

Hoku Scientific

( HOKU).

Shares racked up 14.8% to $7.98 in heavy action after the Hawaii-based maker of clean-energy technologies finally signed a polysilicon supply contract with a subsidiary of solar-power company

Solar Fabrik

. Hoku will be paid up to some $185 million over seven years beginning in the latter half of 2009, dependent on certain milestones and other conditions, with a $2 million fee on signing and $51 million in prepayments prior to the first shipment. The agreement has been in the works since December, when the companies first inked a memorandum of understanding.

The Andersons

(ANDE) - Get Report

, of Maumee, Ohio, boosted its 2007 earnings outlook by 45 cents a share to range between $2.80 and $3.05. That would beat Thomson Financial's per-share estimates by at least 18 cents. Shares of the company, which deals in ethanol production, among other things, were leaping $3.82, or 9.5%, to $44.22.

Panacos Pharmaceuticals

(PANC)

surged 11% to $4.05 on positive preliminary results from a phase IIb study of bevirimat in patients who are failing HIV therapy due to drug resistance. The Watertown, Mass., biotech said this cohort of the study, which tested 250-mg dosing instead of the prior 400 mg, showed about double the bevirimat plasma concentrations and antiviral effect as compared with the prior cohort.

On the flip side, lender

Dollar Financial

(DLLR)

, of Berwyn, Pa., slipped after saying it will offer up to $150 million in senior convertible bonds, along either an initial-purchasers' option for another $22.5 million worth in order to cover overallotments. After a sharp late-trading drop, shares pulled up and were recently near the flat line around $31.10.

Elsewhere,

Tribune

( TRB) -- a media company that, among other things, publishes the

Los Angeles Times

and the

Chicago Tribune

-- saw volatile trading after reporting an 11.1% year-over-year drop in May revenue to $406 million. Shares were down sharply after the closing bell, but lately surfaced to flat-line at $29.96.