on intrinsic task interest and creativity revealed, however, that (a) detrimental effects of reward occur under highly restricted, easily avoidable conditions, " (b) mechanisms of instrumental and classical conditioning are basic for understanding incremental and decremental effects of reward on task

For many years, environmental agencies have sought to improve the water quality of lakes and estuaries by reducing inputs of phosphorus. New research indicates that we must reduce both phosphorus and nitrogen to reverse eutrophica-tion symptoms. Nutrients are chemical elements that influence the productivity of all ecosystems. Nitrogen and phosphorus are two nutrients that are essential for the growth and survival of plants and animals, but often are present in short supply. Both nitrogen and phosphorus are applied regularly through fertilizer to increase the yield of crops needed to feed human populations. Fertilizers also are used widely for residential and commercial landscaping purposes.

and laboratory studies indicate that, in general, workers are sleepier at night5,6 and that worker performance is slower and less accurate.7-9 As a

Till. Detrimental effects of complement activation in hemor-

OBJECTIVE—It has been shown that vascular progenitors from patients with diabetes are dysfunctional. However, therapeutic strategies to counteract their reduced functional capacity are still lacking. Because adiponectin has reported salutary effects on endothelial function, we investigated

the effect of different concentrations of quercetin (10 mM, 100 mM and 1 mM) on 'Candidatus Phytoplasma asteris ' and on phytoplasma-infected peri-winkle shoots grown in vitro. The addition of quercetin neither supported the growth of the shoots nor induced the remission of symptoms in the infected

Abstract not found

In a recent issue of the Journal, ten Berge et al. concluded that indium-111 "has detrimental effect on human lymphocytes " (/). This article must certainly be viewed with apprehension, since several centers are using indium-111 labeling techniques. As we arc also involved in the study

a b s t r a c t Incorporating input from others can enhance decision quality, yet often people do not effectively utilize advice. We propose that greater power increases the propensity to discount advice, and that a key mechanism explaining this effect is elevated confidence in one's judgment

Detrimental effects of wood based construction materials used in the museum environment are dis-cussed. Chemistry of wood and wood products is reviewed with regard to emission of formaldehyde and acetic acid, using examples of storage problems reported in the conservation literature. A method