Difference in outcome of shoulder surgery between workers' compensation and nonworkers' compensation populations.

The purpose of this study was to review the association between compensation status and surgical outcome especially of the shoulder. Given the high prevalence of shoulder injuries in the workplace and the large proportion of workers compensation (WC) claims involving such injuries, it is worth examining the correlation between WC status and surgical outcome of the shoulder. All studies published in journals (MEDLINE and PubMed) from 1980 through 2007 on surgical interventions performed on the shoulder in which workers compensation status was documented and the postoperative functional outcome was compared according to that status were pooled for meta-analysis.

Use of wastewater and compost extracts as nutrient sources for growing nursery and turfgrass species.

Nutrient salts present in liquid by-products following waste treatment are lost resources if not effectively recycled, and can cause environmental problems if improperly disposed. This research compared the growth response and mineral nutrient status of two nursery and two turfgrass species, hydroponically supplied with nutritive by-product extracts derived from anaerobically digested municipal solid waste (MSW) and aerobically composted organic wastes from the mushroom and MSW industries. Forsythia (Forsythia x intermedia 'Lynwood') and weigela (Weigela florida 'Red Prince'), and creeping bentgrass (Agrostis palustris Huds.

An unconventional approach to studying the reaction kinetics of the Fenton's oxidation of 2,4-dichlorophenoxyacetic acid.

The Fenton's oxidation kinetics of herbicide 2,4-D at various [Fe(II)] and [H(2)O(2)] combinations was investigated and modelled through an unconventional approach. The reaction kinetics of 2,4-D degradation demonstrated a two-stage pattern of decay, where a very fast reactive stage was followed by a retardation stage due to the depletion of oxidants and to the competitive side-reactions of the intermediates (including 2,4-dichlorophenol, chlorohydroquinone and 2,6-dichlororesorcinol). A model characterized by two newly established constants, the initial decay rate and the maximum oxidative capacity, was proposed and proven capable of describing the two-stage process, which cannot easily be described by conventional first- or second-order kinetics approaches.