Olsen’s method

Observed m values cluster about 1, but considerable variation is seen among structural types. For some systems, however. Ho + log Ch+ = —X in these cases the excess acidity method is equivalent to Bunnett and Olsen s method, in which the sum Ho + log Ch+ plays the acidity function role. 

Brah and Bishnoi [74] have studied the effect of temperature and soil phosphorus status on the determination of extractable phosphorus by Olsen s method [71]. 

Alkaline Extraction of Soil Phosphorus (Olsen s method) Olsen etal. (1954)... 

Dickman and Bray s chloromolybdic acid reagent having excess of acid for Olsen s method Weigh 15g of ammonium molybdate (AR) and dissolve in 300 ml of warm water (50°C), cool and filter if necessary. To this, add 400 ml of ION HCl and make up the volume to one litre. Mix thoroughly and store in an amber glass stoppered bottle. 

To these add 5 ml of extracting reagent (Bray s or Olsen s) and the colour is developed by adding 5 ml of chloromolybdic acid reagent for Bray s and Olsen s method and stannous chloride (1 ml or less). 

For both Bray and Olsen s method, 5 ml of soil extract was finally made upto 25 ml and the readings taken in spectrophotometer. Let the ppm obtained from standard curve corresponding to the spectrophotometer reading be x ppm. 

Similarly for Olsen s method 2.5 g of soil sample contains... 

Taken from Reference 170. The values are averaged ones obtained by U V and N MR methods in H2S04 or HC104. Bunnett-Olsen s values, 0.4-0.6 in equation 29. This suggested that sulphoxides are not Hammett bases (J. F. Bunnett and F. P. Olsen, Can. J. Chem., 44, 1899 (1966))... 

Olsen, S.R. and Dean, L.A. (1955) Phosphorus. In Black, C.A. (ed.) Methods of Soil Analysis, Part 2. American Society of Agronomy, Madison, Wisconsin, pp. 1035-1 049. 

CAS). There may be an additional frozen core subspace in which each orbital is constrained to remain doubly occupied these core electrons and orbitals need not be treated explicitly in the RAS procedure (cf. section 2.4.7). The full Cl space may be obtained as the maximum limit of the RAS space. The focus of Olsen s paper was on the utility of the RAS method in limiting the size of Cl calculations, but thus far its maximum impact has been on the development of determinant-based full Cl algorithms.83 183... 

Drugli JM, Rogne T, Valen S, Johnsen R, Olsen S. Corrosion test methods for evaluating stainless steels for well flow applications. Corrosion/90, Las Vegas NACE, Paper No 270, 1990. 

Olsen, S., Neale, G., Schwab, K. et al. (2007) Hospital staff should use more than one method to detect adverse events and potential adverse events incident reporting, pharmacist surveillance and local real-time record review may all have a place. Quality and Safety in Health Care, 16(1), 40-44. 

In soils and sediments, chemical fractionation or sequential extraction methods offer another approach to speciation of the forms of phosphorus. Traditionally, there has been more emphasis on bioavailable or plant available inorganic forms, e.g., Olsen s extraction used for soils. 

Similarly to Lanczos method for solving the RPA problem eq 2.15, Davidson s algorithm needs to be modified to take into account the block paired structure of eq 2.18 and scalar product eq Bl. The first RPA algorithm has been developed by Rettrup " and later improved by Olsen. The method has been further refined in ref 79, combined with TDDFT technique, and incorporated into Gaussian 98 package. We will follow ref 79 to describe this method. 

Nielsen, F., Olsen, E., Fredenslund, A. (1994) Henry s law constants and infinite dilution activity coefficients of volatile organic compounds in water by a validated batch air stripping method. Environ. Sci. Technol. 28, 2133-2138. 

Ford,S. F. Olsen, B. (1988). Methods for detecting genetically engineered microorganisms in the environment. Advances in Microbial Ecology, 10, 45-79. 

Madsen, K. G., Olsen, J., Skonberg, C., Hansen, S. H., and Jurva, U. (2007). Development and evaluation of an electrochemical method for studying reactive phase-I metabolites Correlation to in vitro drug metabolism. Chem. Res. Toxicol. 20 821-831. 

Christensen, S.L., Anglov, J.T.B., Christensen, J.M., Olsen, E. and Poulsen, O.M. (1993) Application of a new AMIQAS computer program for integrated quality control, method evaluation and profidency testing. Fresenius Journal of Analytical Chemistry, 345, 343-50. 

Eckert (6) was first to tabulate HETP data in a format suitable for interpolation. Vital, Grossel, and Olsen (65) recommended such data over predictive methods, subject to availability of data for a system similar to that considered. The author concurs with this recommendation. In this chapter, Eckert s table is updated and largely expanded, and new tables and charts are edded for structured packings. 

In 1893, Mendeleeff introduced an improved process for the manufacture of pyrocotton. During the last two years of the World War the Germans used wood pulp as celhilosic raw material instead of cotton linters. After the war, improved flashless and non-hygroscopic powders were developed in the U. S. In recent years Olsen (Western Cartridge Co.) introduced a method which greatly simplifies the washing and stabilization operations in the process and which produces the powder in a uniform spherical form (Ball Powder). 

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