The persistence of coastal marsh is dependent on its ability to maintain elevation relative sea level, particularly for marshes experiencing high rates shoreline erosion due wave-attack, storms, and level rise. Sediments eroded at the edge are either delivered onto platform or into estuary, latter resulting in a net loss sediments soil carbon. Knowledge timing, pattern, quantity sediment deposi...

In a four-year experiment, five nitrogen rates (0, 60, 120, 180 and 240 kg N ha-1) were tested over irrigated sugar beets grown on clays, underMediterranean conditions, in centralGreece. There, sugar beets are commonly grown under water shortages, high temperatures and high soil Na concentrations. Contrary to previous reports, N rates did not affect significantly population density (as asse...

The Adirondack region of New York is characterized by soils and surface waters that are sensitive to inputs of strong acids, receiving among the highest rates of atmospheric nitrogen (N) deposition in the United States. Atmospheric N deposition to Adirondack ecosystems may contribute to the acidification of soils through losses of exchangeable basic cations and the acidification of surface wate...

Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants. These Pn reductions were correlated with increases in leaf resistance to water vapor loss. Theoretical analyses demonstrated that, although the leaf resistance to water vapor loss increases could account for a major part of the net photosynthe...

background: chewing gum is a habit practiced regularly by a relatively high proportion of individuals in many countries including india, and its use has increased within the last decade. the aim of this study was to determine the effects of sugar-free and sugar chewing gums on plaque deposition. materials and methods: the study is a double blind clinical trial involving 16 healthy volunteers (d...

In the early 1980s, nitrogen (N) deposition was first postulated as a cause of N saturation and spruce mortality across the northeastern US. In 1988, a series of high elevation spruce-fir forest N addition plots were established on Mt. Ascutney (southeastern) Vermont to test this hypothesis. The paired plots each received, in addition to ambient N deposition, 15.7 kg N ha-' (low N addition), 31...

Seedlings of maize (Zea mays L. cv WF9 x Mo 17) growing at low water potentials in vermiculite contained greatly increased proline concentrations in the primary root growth zone. Proline levels were particularly high toward the apex, where elongation rates have been shown to be completely maintained over a wide range of water potentials. Proline concentration increased even in quite mild treatm...

one of the most important stages in sugar industry that making wastewater and contamination is the water obtained to washing of co2 in mazoot furnace and related pumps. amount of water consumption in this stage is about 30 to 35 percent of weight of sugar beet, so amount of this stream is considerable. mixing of carbon black and water compose the colloid in liquid phase. these colloids do not s...

The purpose of this study was to increase our understanding of the gaseous elemental mercury (GEM, Hg◦) fluxes between the atmosphere and soils. Moreover, we wanted to quantify the annual GEM flux, identify the controls, and compare the GEM flux to annual rates of gaseous oxidized mercury (GOM) dry deposition and wet deposition of total mercury. We measured GEM fluxes using the modified Bowen r...