Download or read book Algal Assay Procedure written by National Eutrophication Research Program and published by . This book was released on 1971 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Algal Assay Procedure written by Charles M. Weiss and published by . This book was released on 1976 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Evaluation of the Algal Assay Procedure on Surface Waters of North Carolina written by Charles M. Weiss and published by . This book was released on 1976 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Algal Assay Procedure written by Charles M. Weiss and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Interlaboratory Precision Test written by Charles M. Weiss and published by . This book was released on 1971 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Bottle Test of the Provisional Algal Assay Procedure written by Doyle C. Tinkey and published by . This book was released on 1970 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Algal Assay Procedure written by National Environmental Research Center (Corvallis, Or.). Pacific Northwest Environmental Research Laboratory. Eutrophication and Lake Restoration Branch and published by . This book was released on 1974 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Selenastrum Capricornutum Printz Algal Assay Bottle Test written by William Edwin Miller and published by . This book was released on 1978 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Algal Assay Bottle Test written by R. A. Roline and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Algal Assays written by TE. Maloney and published by . This book was released on 1975 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development, refinement, standardization, and practical application of an algal assay procedure are described. Results of experiments are presented to illustrate the use of the algal assay procedure to determine algal growth-limiting nutrients in fresh waters, including lakes and streams; for the assessment of receiving waters to determine their nutrient status and sensitivity to change; for the assessment of the effects of changes in waste treatment processes on receiving waters; and for the evaluation of materials and products to determine their potential effects on algal growth.

Download or read book The Provisional Algal Assay Procedure written by Louis A. Ventura and published by . This book was released on 1973 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Provisional Algal Assay Procedures written by D. F. Toerien and published by . This book was released on 1971 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Batch and continuous flow (chemostat) assays were investigated as part of a joint industry-government sponsored, multilaboratory effort to develop a standardized algal assay procedure for nutrient level assessment. Assays were conducted with Selenastrum capricornutum as a standard assay organism. Batch culture assays were found to have a lower level of precision than chemostat assays in the assessment of growth response as a function of nutrient concentration. The biomass parameter, maximum cell concentration, X̂, of the batch assay generally responded to the nutrient concentration of the sample; however, the chemostat biomass parameter, steady state cell concentration, X1, always was found to be proportional to the nutrient concentration of the samples. The results of spiking tests with batch assays generally were inconclusive with respect to identification of the growth rate limiting nutrient whereas the results of spiking tests with chemostats indicated clearly the growth rate limiting nutrient. It is recommended that batch type algal assays be used only for crude screening or routine monitoring purposes and that the chemostat should be used for the quantitative assessment of the algal growth supporting properties of waters as well as for the development of kinetic descriptions for nuisance algae and the rate limiting nutrients of concern. A kinetic description of Selenastrum capricornutum indicated a low half saturation constant, Ks, (the concentration of nutrient supporting one-half the maximum growth rate) of about 5 [mu]g P/l for phosphate phosphorus and a yield coefficient, Y, that varied as a function of growth rate. A theoretical model was proposed and evaluated which describes the varying yield coefficient (the result of "excess" uptake) as a function of the growth rate (mean cell residence time). The function was verified experimentally at a very high statistical confidence level. The significance of these findings and their application to the practical problem of eutrophication assessment is presented.

Download or read book Biological Assessment of the Soluble Fraction of the Standard Elutriate Test written by Peter J. Shuba and published by . This book was released on 1977 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EPA 600 9 written by and published by . This book was released on 1978-07 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interlaboratory Precision Test written by and published by . This book was released on 1971 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Algal Assay Procedure written by and published by . This book was released on 1973 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Measuring Algal Toxicity and Its Application to the Safety Assessment of New Chemicals written by RH. Hall and published by . This book was released on 1979 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An algal toxicity test has been developed specifically for use in the environmental safety assessment of new chemicals. The test is based on the Algal Assay Procedure (Bottle Test) but has been modified in order to make the procedure useful for toxicity assessment. A five-day exposure of freshwater or marine unialgal cultures to a range of test material concentrations is followed by a nine-day recovery period in the absence of the test material. Cell counts or in vivo fluorescence measurements made during the study allow the quantification of toxic responses ranging from reduced growth, through the algistatic response, to the algicidal response. The primary toxicity effect sought in this method is the algistatic response, which is both easily determined and environmentally meaningful. The algistatic concentration of a test material, as derived by this method, is the concentration that causes no net change in cell number after chronic exposure but permits regrowth when the cells are resuspended in fresh media without the test material. The environmental significance of this type of measurement relative to other measurements of algal toxicity is discussed.