Samphng protocols

Third, populations in industrialized countries, particularly the United States, receive food through a largely centralized food distribution system which simplifies somewhat food staple samphng protocols on a population or national basis. However, there are exceptions such as those who grow and consume their own garden crops or purchase from local farmers markets. Rural residents are more apt to have a higher fraction of local foods than residents of large cities. 

Regardless of species chosen in the final design, it is assumed that in most cases sampling would be done aimually. In addition, sample collection protocols (including considerations of season/time of year, age, sex, tissue, and samphng location within tissue) would have to be clearly specified. 

This equation can be used to relate sample mass, particle size, particle density, and samphng variation to assess current sampling protocols or to develop new ones. Some details on the derivation and application of this formula are given in Appendix B. 

Field workers soon found that the choice of screen material, as well as the thickness of the screen, could influence the amount of surface film material recovered. The Garrett screen was also a fair-weather collection method, since such collection had to be done from a small boat, away from the influence of the research vessel. A wide variety of devices and materials were soon tested and compared [125-128]. The general conclusion was that each device or samphng material collected a shghfly different selection of compounds from the surface layer, so that direct comparisons between different collection protocols could... 

Dimensionality Tracking Mode Controlled System Dynamics Sensor-Display Compatibility Response Samphng Rates Divided-Attention Tasks Other Measures Standard Assessment Procedures Test and Experimental Protocols... 

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