[1] Albertsson PA.1956. Chromatography and partition of cell fragments.Nature,177:771~774 [2] Albertsson PA.1986.Partition of Cell Particles and Macromolecules.3nd.New York:Wiley. [3] Bakken LR.1985. Separation and purification of bacteria from soil.Appl Environ Microbiol,49:1482~1487 [4] Balkwill DL,Labeda DP,Casida LEJr.1990.Simplified procedures for releasing and concentrating microorganisms from soil for transmission electron microscopy viewing as thin-sectioned and frozon-etched preparations.Can J Microbiol,21:252~262 [5] Baath E.1996.Thymidine incorporation of bacteria sequentially extracted from soil using repeated homogenization-centrifugation.Microbiol Ecol,31:153~166 [6] Bardgett RD.1991.The use of the membrane filter technique for comparative measurements of hyphal lengths in different grassland sites.Agric Ecosys Environ,34:115~119 [7] Bodding CL,Bassett EE,Jacobsen I,et al.1999. Comparison of techniques for the extraction and quantification of extra-radical mycelium of arbuscular mycorrhizal fungi in soil.Soil Biol Biochem,31:479~482 [8] Datar R and Rosen CG.1991. Studies on the removal of Escherichia coli cell debris by aqueous two-phase polymer extraction.J Biotechnol,3:207~219 [9] Elmholt S,Kjoller A.1987.Measurement of the length of fungal hyphae by the membrane filter technique as a method for comparing fungal occurrence in cultivated field soils.Soil Biol Biochem,19:679~682 [10] Faegri AV,Torsvik L,Goksoyr J. 1977.Bacterial and fungi activities in soil: Separation of bacterial and fungi by a rapid fractionated centrifugation technique.Soil Biol Biochem,9:105~112 [11] Fisher D and Sutherland IA.1989.Separation Using Aqueous Phase Systems-Applications in Cell Biology and Biotechnology. New York:Plenum Press. [12] Green DC,Vilarino A,Newsam R,et al. 1994,Quantification of mycelial development of arbuscular mycorrhizal fungi using image analysis.Mycorrhiza,5:105~113 [13] Herron PR and Wellington EMH.1990.New method for extraction of streptomycete spores from soil and application to the study of lysogeny in sterile amended and nonsterile soil.Appl Environ Microbiol,56:1406~1412 [14] Hopkins DW,Macnaughton SJ,O'Donnell AG.1990. A dispersion and differential centrifugation technique for representatively sampling microorganisms from soil.Soil Biol Biochem,23:117~225 [15] Hopkins DW,O'Donnell AG,Macnaughton SJ.1991. Evaluation of a dispersion and elutration technique for sampling microorganisms from soil.Soil Biol Biochem,23:227~232 [16] Huddleston JG and Lyddiatt A.1990.Aqueous two-phase systems in biochemical recovery.Appl Biochem Biotechnol,26:249~279 [17] Huddleston JG,Veide A,Kohler K,et al.1991.The molecular basis of partitioning in aqueous two-phase systems.Trend Biotechnol,19:381~388 [18] Jacobsen I,Abbott LK,Robson AD.1992.External hyphae of vesicular-arbuscular mycorrhizal fungi associated with Trifolium subterraneum L. 1. Spread of hyphae and phosphorus inflow into roots.New Phytol,120:371~380 [19] Jenkinson DS and Powlson DS.1976.The effect of biocidal treatments on metabolism in soil V. A method for measuring soil biomass.Soil Biol Biochem,8:179~188 [20] Lindahl V.1996.Improved soil dispersion procedures for total bacterial counts,extraction of indigenous bacteria and cell survival.J Microbiol Methods,25:279~286 [21] Lindahl V,Bakken LR.1995. Evaluation of methods for extraction of bacteria from soil.FEMS Microbiol Ecol,16:135~142 [22] Macdonald RM.1986.Extraction of microorganisms from soil.Biol Agric Hortic,3:361~365 [23] Macdonald RM.1986.Sampling soil microfloras: Optimization of density gradient centrifugation in percoll to separate microorganisms from soil suspensions.Soil Biol Biochem,18:407~410 [24] Macdonald RM.1986.Sampling soil microfloras: Dispersion of soil by ion exchange and extraction of specific microorganisms from suspension by elutration.Soil Biol Biochem,18:399~406 [25] Macdonald RM. 1986. Sampling soil microfloras: Problems in estimating concentration and activity of suspension of mixed populations of soil microorganisms.Soil Biol Biochem,18:411~416 [26] Martin NJ and Macdonald RM.1981. Separation of non-filamentous microorganisms from soil by density gradient centrifugation in percoll.J Appl Bacteriol,51:243~251 [27] Marco RP and Cueto L.2000.Effect of biological suspension on the position of binodal curve in aqueous two-phase systems.J Chromatography B,743:5~12 [28] Marco RP. Alejandro N,Enrique G,et al.2000,Aroma compounds recovery from mycelial cultures in aqueous two-phase processes.J Chromatogr B,743:403~408 [29] Niepold F,Conrad R,Schlegel HG.1979.Evaluation of the efficiency of extraction for the quantitative estimation of hydrogen bacteria in soil.Antonie van Leeuwenhoek,45:485~497 [30] Puri G,Ashman MR,Stribley DP.1996.Aqueous two-phase partitioning and 15N techniques to determine bacterial and non-bacterial fractions of soil microbial N.Soil Biol Biochem,28:137~139 [31] Richard A and Coakley WT.1994. Ultrasound enhanced phase partition of microorganisms.Bioseparation,4:29~38 [32] Riis V,Lorbber H,Babel A.1998. Extraction of microorganisms from soil: Evaluation of the efficiency by counting methods and activity measurements.Soil Biol Biochem,30:1573~1581 [33] Smith NC and Stribley DP.1994.A new approach to direct extraction of microorganism from soil. In:Ritz K,Dighton J,Giller KE eds. Beyond the Biomass.London: British Society of Soil Science (BSSS). [34] Srom G,Paimgren U,Blomquist G. 1987. Separation of organic dust from microorganism suspensions by partitioning in aqueous polymer two-phase systems.Appl Environ Microbiol,53:860~863 [35] Tupin PE,Maycroft KA,Rolands CL,et al.1993.An ion-exchange based extraction method for the detection of salmonellas in soil.J Appl Bacteriol,53:860~963 [36] Vance ED,Brookes PC,Jenkinson DS.1987.An extraction method for measuring soil microbial biomass C.Soil Biol Biochem,19:703~707 [37] Vilarino A,Arinel J,Schuepp H.1993.Extraction of vesicular-arbuscular mycorrhizal mycelium from sand samples.Soil Biol Biochem,25:99~100 [38] Water H,Brookes DE,Fisher D,eds.1985. Partitioning in Aqueous Two-Phase System.New York:Academic Press Inc. [39] Walter H. 1977.Partition of cells in two polymer aqueous phase A surface affinity method for cell separation. In:Catsimpoolas N ed. Methods of Cell Separation.New York:Plenum Press.307~354 [40] Walter H,Johansson G,Brookes DE.1991.Partitioning in aqueous two-phase systems: Recent results.Analy Biochem,197:1~18 [41] Wu J,Joergenson RG,Pommering B,et al.1990. Measurement of soil microbial biomass C by fumigation-extraction-An automated procedure.Soil Biol Biochem,22:1167~1169 [42] Yu W,Dodds WK,Banks MK,et al.1995.Optimal staining and sample storage time for direct microscopic enumeration of total and active bacteria in soil with two fluorescent dyes.Appl Environ Microbiol,61:3367~3372 |