Radon from drinking water — evaluation of water-borne transfer into house air

To determine the transfer of²²²Rn from domestic water into air, nine houses were measured for²²²Rnt, house volume, water use and air exchange by SF₆ and radon. Measurements were done in Maine during April and May, 1986, when sealed up for the winter. Radon in water concentration ranged from 35,000 to 1,250,000 pCi/l. Air peaks of²²²Rn ranged from 13 to 200 pCi/l due to a water use burst experiment. Use of water filters was also examined by repeats with filters on and off. Water use ranged from 200 to 1922 litres/day. House volumes ranged from 380 to 999 m³. Air exchange rates measured by SF₆ was twice as large as air exchange rate measured by²²²Rn.     

坦桑尼亚霞水母章鱼(Octopus cyanea Gray)的个体渔业

2000年4月期间坦桑尼亚霞水母章鱼(1849)个体渔业的初步结果到2001年6月才被提供.对在坦噶、马菲亚岛和姆特瓦拉三地的2546个单个渔获物和15 473个样品进行了分析.     

Innovative technologies to remove alkylphenols from wastewater: a review

Environmental Chemistry Letters - Alkylphenols and alkylphenol polyethoxylates are emerging hazardous contaminants due in particular to their endocrine-disrupting properties. These compounds...     

Winter arsenic pollution in 10 forest ecosystems in the mountainous border regions of the Czech Republic

Environmental Science and Pollution Research - Arsenic (As) concentrations and deposition fluxes were measured in snow and rime at 10 mountain-top sites near the borders between the Czech Republic...     

Subjective realities of climate change: how mental maps of impacts deliver socially sensible adaptation options

This paper discusses the perceived impacts of weather-related extreme events on different social groups in New Delhi, India. Using network statistics and scenario analysis with the Fuzzy Cognitive Mapping as part of a vulnerability analysis, the investigation provides quantitative and qualitative measures to compare impacts and adaptation strategies for different social groups. Impacts of rain events and heat waves are considered and differ across groups. Rain events affect the lower income classes more, while heat waves are the bigger burden for higher income classes. Overall, the strength of perceived impacts is larger for lower income classes, directly threatening their daily incomes. Urban managers have no immediate feedback on their livelihood, but often refer to health issues. The strongest effect on ameliorating burdens is investments in schemes to ease traffic, e.g., by improving the sewage and drainage infrastructure paired with other supply side measures to enable transport of goods for lower income classes during rain. During heat events, improving the water supply situation would reduce burden for all, while constant electricity supply is an effective means in reducing burden for the higher income classes in particular. Our analysis suggests that improvements in the water supply and sewage infrastructure would be the most suitable first step to initiate a well-planned adaptation strategy for all social groups.     

Shell repair in Nautilus macromphalus

The shell of Nautilus macromphalus, like that of N. pompilius, consists of an outer spherulitic-prismatic layer, a middle nacreous layer, and an inner semiprismatic layer. No periostracum was observed. When an area of shell 2 cmx2 cm over the living chamber was removed experimentally, it was replaced by shell of normal structure. Regeneration required 45 days. Observations of regenerated shell made with a scanning electron microscope showed that the spherulitic portion of the spherulitic-prismatic layer was formed from crystal grains that developed into spherulites. The nacreous layer was formed by the deposition of stacks of hexagonal crystals which, through lateral growth, made contact with crystals in adjoining stacks and formed continuous layers 1 crystal in thickness. The deposition of all the shell layers during regeneration was probably accomplished by a single mantle region rather than by different mantle regions as in normal shell growth.     

LABORATORY EXPERIMENTS AS AN AID TO LAKE RESTORATION DECISIONMAKING1

ABSTRACT: The choice of a lake rehabilitation technique can be assisted by laboratory experiments concerned with the composition and properties of the sediments. This work on Sawgrass Lake, Pinellas County, Florida, provides an example of the type of laboratory information that can be useful towards making decisions regarding the most effective restorative techniques. Experiments include chemical analysis of sediment (water content, organic content, pesticides, nutrients), rate of sediment compaction and rehydration at ambient conditions, and the effect of treatment with alum and other chemicals.     

Building a place-responsive society through inclusive local projects and networks

This paper presents the story of a project undertaken by researchers who are active participants in the national Australian debate over place and belonging. It arose from the desire to ground this debate, which brings issues of ecological sustainability, reconciliation and multiculturalism together, in more localised action aimed at building a 'place-responsive society'. The project was carried out as a case study in a region that combines part of the Sydney metropolitan area and the separate 'city' of the Blue Mountains, and involved a consultative committee and then a regional forum of conservationists, environmental educators and community workers. The researchers explored existing place-oriented initiatives in the region and developed practical projects for the future, most notably a proposal for 'totemic species' work within schools involving local Aboriginal people. The research demonstrated, more than anything else, that indigenous Australian approaches to 'place awareness' and nature conservation remain highly relevant in contemporary Australia. It also showed that bioregional awareness and the notion of place responsiveness can add value to more traditional approaches to nature conservation and environmental education. There are opportunities to galvanise local action that can integrate community and environmental work and revitalise professional practice in both areas, but the effort involves working constantly with difference and conflict.