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  • Articles  (164)
  • 2005-2009  (82)
  • 1995-1999  (57)
  • 1985-1989  (25)
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  • 11
    Electronic Resource
    Electronic Resource
    I see that I see: a hero's impact on a family therapist (2005)
    Bingley : Emerald
    Kybernetes 34 (2005), S. 343-352 
    Details
    ISSN: 0368-492X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Computer Science
    Notes: Purpose - The purpose of this paper is to highlight the influence of the late Heinz von Foerster in the life of an admirer and friend who remains a leader in the field of family therapy. Design/methodology/approach - The approach is autobiographical. The method is (loosely) process recall and personal theoretical reflection. Objectives are achieved by organizing major tenets of von Foerster's constructivism into personal categories of meaning. Findings - Findings included a deep philosophical influence on the author's professional life; an abiding impact on his personal life; and a durability of von Foerster's ideas across disciplines, time, and the ever-changing theories and politics of the mental health profession. Originality/value - This paper adds value to the social sciences in general, and to the field of family therapy in particular, because it highlights the interconnectedness of person and profession and the confluence of the messenger/message. Some might say this is cybernetics in vivo. There may be little that is "new" in this paper in terms of theoretical constructs, but the autobiographical nature of the reflections may be its most valuable contribution to others struggling with such concepts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03684920510581512
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  • 12
    Electronic Resource
    Electronic Resource
    Acot, Pascal: Histoire de l'écologie : Paris, Presses Universitaires de France, 1988 (1989)
    Cambridge : Cambridge University Press
    The @British journal for the history of science 22 (1989), S. 91-92 
    Details
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0007087400025668
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  • 13
    Electronic Resource
    Electronic Resource
    Guldin, Gregory Eliyu: The Saga of Anthropology in China: From Malinowski to Moscow to Mao. : Armonk, M. E. Sharpe,, 1994 (1996)
    Cambridge : Cambridge University Press
    The @China quarterly 148 (1996), S. 1388-1389 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000050852
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  • 14
    Electronic Resource
    Electronic Resource
    Greg, Guldin; Aidan, Southall: Urban Anthropology in China : Leiden, E. J. Brill, 1993 (1995)
    Cambridge : Cambridge University Press
    The @China quarterly 144 (1995), S. 1220-1221 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000005026
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  • 15
    Electronic Resource
    Electronic Resource
    Recombinant plasmid DNA mobilization by activated sludge strains grown in fixed-bed or sequenced-batch reactors (1996)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 21 (1996), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: The possibilities of mobilizing recombinant DNA (rDNA) by strains from activated sludge have been studied. A mixture of ten bacterial strains isolated from activated sludge was grown on a support in a continuously fed fixed-bed reactor or in suspension in a sequenced-batch reactor with biomass recycling. After reaching steady state, the bacteria in both types of reactors were used as the recipient population for evaluating the dissemination of the non-conjugative and non-mobilizable recombinant plasmid pCE328. The dissemination of this plasmid, derived from pBR328 (tra−, mob−, oriT−), was studied in comparison with that of pCE325 (pBR325 derivative tra−, mob−, oriT+), and that of the natural broad host range conjugative plasmid R388 (IncW). Initially the mobilization properties of pBR type recombinant plasmids between two strains of Escherichia coli were determined in the fixed-bed reactor. Only the mobilization of the recombinant plasmid bearing a transfer origin (pCE325) was observed. The survival of E. coli strains bearing either the non-transferable plasmid pCE328 or the conjugative plasmid R388 and added to the activated sludge reactors was measured in the effluent of both types of reactors. In the fixed-bed reactor effluent, the donor populations remained stable after three days of operation and reached 103 to 105 colony forming units (cfu) ml−1, whereas they decreased in the sequenced-batch reactors: donors bearing the pCE328 plasmid decreased by 2 log units in 20 days, whereas those bearing the R388 plasmid decreased by less than 1 log unit. Mobilization of the pCE328 plasmid could not be detected in any case. Transfer of the conjugative plasmid R388, used as a positive propagation control, was detected in strains arising from activated sludge in both types of reactors. Nevertheless, establishment of transconjugants was observed only in the fixed biomass at the rate of 10−7 transconjugants per recipient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1996.tb00341.x
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  • 16
    Electronic Resource
    Electronic Resource
    Synthesis of nanosize poly(methyl methacrylate) microlatexes with high polymer content by a modified microemulsion polymerization (1998)
    Springer
    Polymer bulletin 40 (1998), S. 749-756 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Nanosize poly(methyl methacrylate) (PMMA) microlatexes with high PMMA/surfactant ratio have been successfully prepared by a modified microemulsion polymerization, i.e., continuous and slow addition of monomer (MMA) to the polymerizing MMA microemulsion with mild stirring. Number-average diameters of 33–46 nm with narrow polydispersity (Dv/Dn= 1.1) and polymer content of 6–24 wt% were achieved using low levels of surfactant (dodecyltrimethylammonium bromide, DTAB) — less than 1 wt% of the reaction mixture. Particle diameter depended on polymerization temperature, MMA content, and concentrations of initiator and surfactant. Larger particles wereformed when temperature was too high, initiator concentration was too high, or surfactant concentration was too low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050318
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  • 17
    Electronic Resource
    Electronic Resource
    Maternal inheritance of mitochondrial DNA in sexual crosses of Pythium sylvaticumm (1989)
    Springer
    Current genetics 16 (1989), S. 373-374 
    Details
    ISSN: 1432-0983
    Keywords: Pythium sylvaticum ; Mitochondrial inheritance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Fifty single oospore progeny from crosses between opposite mating types of Pythium sylvaticum that contained polymorphisms in mitochondrial DNA (mtDNA) for HindIII restriction sites were analyzed for patterns of mitochondrial inheritance. All progeny retained the morphological form of the oogonial parental type; the antheridial form or recombinant forms of parental mtDNA were not detected. With the techniques used, other forms of mtDNA would have been detected it they had comprised 8% or more of the mitochondrial population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00340717
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  • 18
    Electronic Resource
    Electronic Resource
    Thorium and uranium isotopes in a manganese nodule from the Peru basin determined by alpha spectrometry and thermal ionization mass spectrometry (TIMS): Are manganese supply and growth related to climate? (1996)
    Springer
    International journal of earth sciences 85 (1996), S. 577-585 
    Details
    ISSN: 1437-3262
    Keywords: Manganese nodules ; Thorium dating ; Uranium isotopes ; Peru basin ; TIMS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Thorium- and uranium isotopes were measured in a diagenetic manganese nodule from the Peru basin applying alpha- and thermal ionization mass spectrometry (TIMS). Alpha-counting of 62 samples was carried out with a depth resolution of 0.4 mm to gain a high-resolution230Thexcess profile. In addition, 17 samples were measured with TIMS to obtain precise isotope concentrations and isotope ratios. We got values of 0.06–0.59 ppb (230Th), 0.43–1.40 ppm (232Th), 0.09–0.49 ppb (234U) and 1.66–8.24 ppm (238U). The uranium activity ratio in the uppermost samples (1–6 mm) and in two further sections in the nodule at 12.5±1.0 mm and 27.3–33.5 mm comes close to the present ocean water value of 1.144±0.004. In two other sections of the nodule, this ratio is significantly higher, probably reflecting incorporation of diagenetic uranium. The upper 25 mm section of the Mn nodule shows a relatively smooth exponential decrease in the230Thexcess concentration (TIMS). The slope of the best fit yields a growth rate of 110 mm/Ma up to 24.5 mm depth. The section from 25 to 30.3 mm depth shows constant230Thexcess concentrations probably due to growth rates even faster than those in the top section of the nodule. From 33 to 50 mm depth, the growth rate is approximately 60 mm/Ma. Two layers in the nodule with distinct laminations (11–15 and 28–33 mm depth) probably formed during the transition from isotopic stage 8 to 7 and in stage 5e, respectively. The Mn/Fe ratio shows higher values during interglacials 5 and 7, and lower ones during glacials 4 and 6. A comparison of our data with data from adjacent sediment cores suggests (a) a variable supply of hydrothermal Mn to sediments and Mn nodules of the Peru basin or (b) suboxic conditions at the water sediment interface during periods with lower Mn/Fe ratios.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02369012
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  • 19
    Electronic Resource
    Electronic Resource
    The history of ecology: Achievements and opportunities, Part two (1985)
    Springer
    Journal of the history of biology 18 (1985), S. 103-143 
    Details
    ISSN: 1573-0387
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , History
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127959
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  • 20
    Electronic Resource
    Electronic Resource
    Linear mitochondrial genome organization in vivo in the genus Pythium (1995)
    Springer
    Current genetics 28 (1995), S. 225-234 
    Details
    ISSN: 1432-0983
    Keywords: Pythium ; Linear mitochondrial DNA ; Pulsed-field gel electrophoresis ; ATPase9 ; mtDNA replication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pulsed-field gel electrophoresis (PFGE) of isolates of Pythium oligandrum with linear mitochondrial genomes revealed a distinct band in ethidium bromide-stained gels similar in size to values estimated by restriction mapping of mitochondrial DNA (mtDNA). Southern analysis confirmed that these bands were mtDNA and indicated that linear genomes were present in unit-length size as well as multimers. Isolates of this species with circular mtDNA restriction maps also had low levels of linear mono- and multimers. visualized by Southern analysis of PFGE gels. Examination of 17 additional species revealed similar results; three species had distinct linear mtDNA bands in ethidium bromide-stained gels while the remainder had linear mono- and multi-mers in lower amounts detected only by Southern analysis. Sequence analysis of an isolate of P. oligandrum with a primarily circular mitochondrial genomic map and a low amount of linear molecules revealed that the small unique region of the circular map (which corresponded to the terminal region of linear genomes) was flanked by palindromic intrastrand complementary sequences separated by a unique 194-bp sequence. Sequences with similarity to ATPase9 coding regions from other organisms were located adjacent to this region. Sequences with similarity to mitochondrial origins of replication and autonomously replicating sequences were also located in this region: their potential involvement in the generation of linear molecules is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309781
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