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The captive bubble method was used to describe the wetting characteristics of a number of commercial ultrafiltration (UF) membranes. The membranes belonged to one of two homologous (same material, different cut-off) series made by the same manufacturer. One series was made of polysulphone and the other one of cellulose triacetate. The porosimetric characteristics of the membranes have also been me

A description of general models for adsorption kinetics is given. Combinations of the models are compared with adsorption data for the self-associating proteins β-lactoglobulin A and B, from Elofssonet al.(U. M. Elofsson, M. A. Paulsson, and T. Arnebrant,Langmuir,submitted). The adsorption onto methylated silica surfaces was measured by these authors by ellipsometry in phosphate buffer (0.01M,pH 7

This paper focuses on the residential resettlement decisions of a sample of immigrants from Iran and Turkey living in Sweden between 1968 and 2001. Using the Swedish Longitudinal Immigrant database, we are able to link unique pre- and post-migration data to understand whether region of origin is a better predictor of internal migration decisions than is country of origin, the more often used measu

The occurrence of wildfires is greatly dependent on an ecoregions typical climate and land cover type. To investigate whether climate or land cover primarily lead to wildfires in the conterminous United States, wildfire events from 1999- 2010 are analyzed. Wildfires are divided into years and eco-divisions, a sub-form of ecoregions. To assess whether warmer and dryer divisions are more severely a

In general Uganda receives enough rainfall to rain-feed crops and pasture but as climate is changing the seasonal patterns are expected to become more extreme. This influences how the land can be used, and has a strong impact on the farmers who depend on their land for economic income and food security. This report has two aims. The first is to identify the farmer’s experiences of climate change a

The 1994 Tutsi Genocide in Rwanda affected the society, as well as its surrounding environment. By the use of Remote Sensing and GIS, the study looked at the evidence of change to the landscape by looking at vegetation based on NDVI (Normalized Difference Vegetation Index) To explain the reason behind the noticed change, the following parameters were used: • rainfall variations, • refugees and p

Humpback whales (Megaptera novaeangliae) require dense prey aggregations due to the high energetic cost of their feeding methods. Modeling studies have shown that when whales are on their feeding grounds, they are closely associated with high prey concentrations. These studies collapse the prey field into a two dimensional measure of prey abundance in horizontal space. However, patchiness is one o

In the Subantarctic Zone of the Southern Ocean, a combination of physical forcings, chemical solubility and biological fixation is controlling the carbon uptake and thus the role the Southern Ocean is playing in the remediation of global climate change. Therefore, it is necessary to understand the mechanisms controlling oceanic carbon budgets and to quantify biological uptake rates to make reliabl

Biodiversity, and in particular plant species diversity decline is linked to landscape fragmentation and habitats loss due to land use transformations but also to decreasing dispersal vectors in the landscape. During the last 200 years the landscape has undergone dramatic changes in its structure and its habitats diversity. Among the different habitats that constitute rural landscape there are thr

The majority of approaches for mass appraisal are based on global statistical models that take into account property characteristics, and, in developing countries, location variables are not often explicitly considered. The present study uses Geographic Information Systems (GIS) as an analytical tool to develop a number of location variables and to analyze their impact in the value of properties.

Popular summary: Air quality data mart built in this study consists of historical air pollutant data for cities across Ontario. This data is available at the Ontario ministry of environment website from 2000-2007 for most of the cities. There is missing data for some of the cities and some pollutants as well. It is because the monitoring of those specific pollutants did not commence in or before 2

Popular science: Find a suitable area for rainwater harvesting Rainwater harvesting is a technique to capture and store rainfall where it falls. The technique of water harvesting can be used for different purposes, e.g providing irrigation water, drinking water, increase groundwater recharge, and reduce flood risk. The application of rainwater harvesting is suitable in arid and semi-arid areas, w

Popular Summary Native forests are one of the most important natural resources in Chile and cover 13.6 million ha in Chile (18% of the country area). These forests provide a wide range of ecosystem services but have been negatively affected by drastic land-use changes. Taking into account that future climate and land-use changes will affect these ecosystems, it is important to have efficient tools

Popular science Boreal forests play an important role within the global climatic system, since they generally act as a carbon sink. However, contrary to expectations, measurements have shown that the boreal forest at the Norunda research site in Central Sweden is acting as a carbon source, i.e. emitting more of the greenhouse gas carbon dioxide (CO2) as taking up. Soil CO2 efflux plays an importan

Northern peatlands have accumulated carbon for thousands of years and currently hold around one third of all soil carbon on earth. Large uncertainties are associated with predictions of how northern peatlands will react to climate change. This is because the cold, wet and anaerobic conditions lead to two opposing forces from a radiative forcing perspective – CO2 sequestration from photosynthesis b

Large amounts of carbon in the terrestrial biosphere are stored in forest ecosystems and its soil. Once the forest ecosystem is disturbed the release of this carbon can drive positive feedback to global warming. Humans impact the forest ecosystem through clear-cutting for wood production and other commercial purposes. Clear-cutting is still a standard forestry management method, but its effect on