Field and mesocosm methods to test biodegradable plastic film under marine conditions

Determining Temporary Odour Concentration under Field Conditions – Comparison of Methods

The authors compared two methods of determining odour concentration under field conditions. Twelve series of odour measurements were carried out at a mink farm. Odour concentration was determined using a portable dynamic olfactometer (nasal ranger, st. croix sensory, inc.) and by approximation using the psychophysical Weber-fechner equation of S-logZ on odour intensity results. Odour concentrat...

Response of typha latiffolia to cutting competition and glyphosate under field conditions

Laboratory Test Methods to Determine the Degradation of Plastics in Marine Environmental Conditions

In this technology report, three test methods were developed to characterize the degradation of plastic in marine environment. The aim was to outline a test methodology to measure the physical and biological degradation in different habitats where plastic waste can deposit when littered in the sea. Previously, research has focused mainly on the conditions encountered by plastic items when float...

Further Notes about Biodegradable Plastic

Reverte oxo-biodegradable additive masterbatch and bags are not compliant to the criteria stated in AS4736 which is an Australian Standard® Biodegradable plastics—Biodegradable plastics suitable for composting and other microbial treatment documents. Well Plastics UK are in the same opinion as the Oxo-biodegradable Plastics Association that bio-based is the wrong technology (reason is as attach...

The perceptibility curve test applied to CCD and two methods of digitization of dental film-based radiographs

Objectives: Several methods of image acquisition are accessible in dentistry. There is no overall acceptable method for image digitization so all different types of images can be comparable. The objective of this study was to compare the diagnostic accuracy of different methods of image digitization. Methods: This accuracy diagnostic test study used perceptibility curve test which first intr...