Knauer

Experimental part was provided by device Model Knauer-Compact with UV-detector (b=3 mm) at 250 nm and column Spherisorb-ODS-2 (250x4,6 mm). Sample volume was 1-2 p.1 injected by Reodyne 7725. Concentration range was 0.4-0.5 mg/ml for solutions of studied substances in DMSO. The organic modificator concentration range was 75-85 % w for methanol and 40-60 % w for acetonitrile in eluent (flow rate -1 ml/min). 

FIGURE 15.5 Column No. 2. Calibration dependences for PMMA dissolved in chloroform and eluted in eluents THE ( ) (pumping system Waters 510), chloroform ( ), chloroform/toluene 20/80 (- ), and chloroform/toluene 5/95 ( ) (all using the pumping system from Knauer). 

RTC140 K. Krohn and B. Knauer, Red. Trav. Chim. Pays-Bas, 1996, 775, 140. 

Molecular weight distribution was analysed by gel chromatography (0.5 % AG) equipped with a Shodex Ohpak B 805 column (500 8 mm) with phosphate buffer (pH 6.5) using diffe-rential-refractometer/viscometer detection (Knauer). For calibration a pectin series from vibration milling was applied. 

The fluid from the tube or the core leaves the valve through port 5 and enters the inlet of the sample cell of the differential refractometer (made by Knauer of West Germany). The residue flows out of the sample cell to the waste. The reference cell contains... 

Bley, K., Gruber, B., Knauer, M., Stein, N, and Ugi, I. New Elements in the Representation of the Logical Structure of Chemistry by Qualitative Mathematical Models and Corresponding Data Structures. 166, 199-233 (1993). 

Molecular weights were determined by vapour pressure osmometry in benzene solution using a Knauer apparatus. 5 concentrations over the range 1 - 5 g/ were employed and the molecular weight was obtained by extrapolation to infinite dilution. 

F. J. Feher, K. D. Wyndham, and D. J. Knauer, Synthesis, characterization and lectin binding study of carbohydrate functionalized silsesquioxanes, Chem. Commun. (1998) 2393-2394. 

Fowler SW, Knauer GA (1986) Role of large particles in the transport of elements and organic compounds through the oceanic water column. Prog Oceanog 16 147-194... 

Bruland KW, Franks RP, Knauer GA (1979) Anal Chim Acta 105 233... 

Martin, J.H. and G.A. Knauer. 1973. The elemental composition of plankton. Geochim. Cosmochim. Acta... 

Lathrop, R.C., P.W. Rasmussen, and D.R. Knauer. 1991. Mercury concentrations in walleyes from Wisconsin (USA) lakes. Water Air Soil Pollut. 56 295-307. 

Burdick, D., Soreghan, B., Kwon, M., Kosmoski, J., Knauer, M., Henschen, A., Yates, J., Cotman, C., and Glabe, C. (1992). Assembly and aggregation properties of synthetic Alzheimer s A4/beta amyloid peptide analogs./. Biol. Chan. 267, 546-554. 

Knauer, K., Behra, R. and Sigg, L. (1997). Adsorption and uptake of copper by the green alga Scenedesmus suhspicatus (Chlorophyta), J. Phycol, 33, 596-601. 

Bruland, K. W., Franks, R. P., Knauer, G. A. and Martin, J. H. (1979). Sampling and analytical methods for the determination of copper, cadmium, zinc and nickel at the nanogram per liter level in sea water, Anal. Chim. Acta, 105, 233-245. 

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