916 PB 188 WEED THRESHOLDS BY MECHANICAL AND CHEMICAL CONTROLS IN WILD BLUEBERRIES

Cooperative Extension: Maine Wild Blueberries

Introduction Many species of insects visit flowers in search of nectar and pollen. In return for these foods, the insects inadvertently pollinate the flowers. The major groups of insect pollinators are the bees, moths, butterflies, flies, and beetles. Some of the common minor groups of insect pollinators are ants, wasps, thrips, and true bugs. Many native insect species are important pollinator...

Collectivity and Configuration Mixing in 186 , 188 Pb and 194

Anthocyanins in wild blueberries of Quebec: extraction and identification.

Anthocyanins were extracted from a mixture of berries of Vaccinium angustifolium and Vaccinium myrtilloïdes at 7.7 degrees C, 26 degrees C, and 79 degrees C using ethanol alone or ethanol acidified with hydrochloric, citric, tartaric, lactic, or phosphoric acids at a solvent to solid ratio of 10. The effect of these parameters on extracted anthocyanins stability was investigated. The pH-differe...

Kinetic controls on Cu and Pb sorption by ferrihydrite.

Metal partitioning in ferrihydrite suspensions may reach equilibrium only after a long reaction time. To determine key factors controlling the kinetics, we measured Cu and Pb uptake as a function of ferrihydrite morphology, reaction temperature, metal competition, and fulvic acid concentration over a period of 2 months. X-ray microscopy, which was used to probe ferrihydrite morphology in suspen...

Thresholds in chemical carcinogenesis.

It is common practice to base carcinogenic risk assessment on the view that there is no threshold for chemical carcinogenesis. In this context, the threshold is defined as a dose below which no effects are observed. Analysis of epidemiological and experimental data on chemical carcinogenesis confirms that no thresholds have been demonstrated in human or animal studies, including the ED01 study ...