The formation of chromophores and leucochromophores during the manufacturing of thermomechanical pulp (TMP) has been investigated. As analytical tools, advanced UV-VIS and NMR spectroscopy have been used. With the exception of some pilot plant scale refining experiments, that were carried out at Valmet Fibertech (Sundsvall), the work has been conducted at the Royal Institute of Technology (Stoc...

The extensive Interior Alaska loess deposits record glacial advance and retreat over the past 3 Myrs. Refining our understanding of still-debated origins this will help us refine climate patterns since late Cenozoic. We present here first detrital-zircon ages from Gold Hill loess, a well-studied deposit in Fairbanks, Alaska, as well new local fluvial sediments. describe statistical approach to ...

In this thesis, I propose a holistic approach for capturing, analyzing, and refining behavioral requirements of a software system by synthesizing, analyzing, and refining Modal Transition Systems in a scalable manner.

since a high toxicity of cyanide which use as a reagent in the gold processing plant, thiosulfate has been recognized as a environmental friendly reagent for leaching of gold from ore. after gold leaching process it's important for recovery of gold from solution using adsorption or extraction methods, one of these methods is activated carbon.the loading of gold from industrial thiosulfate solut...

to confirm the side-effects of gold sodium thiomalate (gstm), we carried out a retrospective study examining 102 consecutive patients with rheumatoid arthritis attending the rheumatology unit of hafez hospital, shiraz, iran, in whom gstm was initiated between 1983-1989. only patients with classical or definite ra (ara criteria) we(e included in this study. patients were categorized as having de...

As part of a program to reduce electrical energy consumption in the refining process, the effects of the ozone and alkaline peroxide treatments on fibre and handsheet properties, prior and subsequent to low consistency (LC) refining, were assessed and compared by applying different levels of ozone and a range of peroxide and alkali charges to a primary stage hemlock thermomechanical pulp (TMP)....

High strength aluminum alloys, especially those containing zirconium, are historically difficult to grain refine. Early efforts by Alcoa indicated that the addition of lithium to these alloys increases difficulty with grain refinement. Although grain refining of alloys 2090 and 2091 was possible, consistent results were not obtained. Statistically-designed experiments were used to quickly ident...