ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Impact of Great Blue Heron Depredations on Channel Catfish Farms (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 26 (1995), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: With the growth of channel caffish Ictalurus punetatus production in the Delta Region of Mississippi over the last 30 years have come concurrent depredation problems caused by great blue herons Ardea herodias. Biomass in stomachs from herons collected at catfish farms averaged 41% catfish, 38% sunfish Lepomis sp., 17% shad Dorosoma cepedianum, and 4% gambusia Gambusia sp.; whereas observations of herons foraging indicated that 45% of the prey taken were gambusia. Our observational data indicate that herons take an average of 12 10-cm catfish fingerlings daily. The diurnal density of foraging herons on catfish ponds averaged 0.17 herons/ha in 1990, which means that the average 127-ha farm supports approximately 22 herons. Nocturnal foraging, especially on dark nights, appears to be minimal. If our data are approximately correct, the average catfish farm could be losing $30/ha per yr to herons, assuming that this catfish fingerling mortality can be attributed solely to heron depredation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1995.tb00244.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    INTERMEDIATES IN THE RHODIUM-CATALYZED HYDROFORMYLATION OF OLEFINS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 333 (1980), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1980.tb53631.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Industry Information Transfers: The Effect of Information Environment (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of business finance & accounting 23 (1996), S. 0 
    Details
    ISSN: 1468-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This study extends the information environment theory of Atiase (1985) that suggests an inverse relation between the information available about a firm and the security price reaction to its release of earnings. Non-announcing firms' security price responses are found to be inversely related to their market value but directly related to the number of peer firm articles appearing in the Wall Street Journal and the historical earnings correlations within their industry. The results suggest that information environment affects the security price relevance of a firm's own and its peer firms' earnings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1468-5957.00080
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Barriers to adopting management expert systems: case studies of management accounting applications which failed (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Expert systems 8 (1991), S. 0 
    Details
    ISSN: 1468-0394
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: Abstract: The purpose of this paper is to draw attention to some important barriers to the practical application of expert systems to management problems. By drawing attention to these barriers, we show two findings: (a) that certain types of knowledge found in management situations are more likely to lead to the successful adoption of management expert systems (MESs) than others; (b) that a potential exists for an alternative form of MES application. The first finding has implications for knowledge elicitation. We propose that MESs developed from academic knowledge, which we define in specific terms, are more likely to succeed than those developed from working with managers in the field. Alternatively, feasibility studies should include an analysis of the type of knowledge which a manager is capable of providing to ensure that suitable knowledge is available for knowledge elicitation purposes. The second finding has implications for the developers of MESs at both research and commercial levels. We suggest the need for a check-list MES application, capable of converting responses to strategic and operational questions into managerial actions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0394.1991.tb00288.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Spatial-Temporal Patterns in Employment Growth (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 3 (1972), S. 0 
    Details
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-2257.1972.tb00612.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Genomic investigation of phenotypic variation in Campylobacter jejuni flagellin (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 84 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Western blots of whole-cell sonicates of 10 different clones of a faecal isolate of Camphylobacter jejuni 533 detected the expression of flagella antigens of either 59 or 62 kDa. Other antigenic proteins appeared identical both in the parent and all the clones. The mechanism for this phenotypic variation was studied using Southern blotting with a flagellin-specific gene probe and products of a polymerase chain reaction (PCR) using flagellin-gene primers. Restriction-enzyme digestion and Southern blotting did not dected any genomic rearrangements in the flagellin genes of the different phenotypes nor did restriction-enzyme analysis of the PCR products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04578.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Formation of methylmercaptan and dimethylsulfide from methoxylated aromatic compounds in anoxic marine and fresh water sediments (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 74 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Anaerobic formation of dimethylsulfide (DMS) and methylmercaptan (MSH) in anoxic sulfide-containing slurries from marine and fresh water sediments was stimulated by addition of syringate (4-hydroxy,3,5,-dimethoxybenzoate) and 3,4,5,-trimethoxybenzoate. The release of DMS and MSH occurred during the consumption of the aromatic monomers and ceased after their depletion. DMS was the dominant methylated sulfur compound in fresh water sediments, in contrast to marine sediments where MSH was predominant. No production of volatile organic sulfur compounds was observed in slurries containing gallate (3,4,5,-trihydroxybenzoate) or in autoclaved controled. About 50–65% of the methoxy carbon could be accounted for by peak accumulation of DMS and MSH. In the saline sediments, large amounts of CH4 were formed during the period when DMS and MSH disappeared. About 65–70% of the methylcarbon of the volatile methylated sulfur compounds (VMSC) could be accounted for in the produced CH4. This study demonstrates a previously unknown microbial process by which DMS and MSH are formed during anaerobic decomposition of methoxylated aromatic compounds in marine and freshwater sediments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb04076.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Dynamics and controls of methane oxidation in a Danish wetland sediment (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 74 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The patterns and controls of methane oxidation in a Danish wetland sediment have been determined using a combination of slurry and intact core techniques. Results from slurries indicated that methane oxidation was effectively inhibited by low concentrations of nitrapyrin (9 μM) and acetylene (0.5 μM) but that oxidation was relatively insensitive to pH between 6 and 8; in addition, high concentrations of ammonia (1 mM) decreased oxidation, especially at alkaline pH. Kinetic analyses of methane oxidation in slurries indicated that Vmax was high relative to values reported for other sediments, that Vmax changed seasonally, that Km was consistently low (2–4 μM) and that threshold values were low (3–5 nM) but insufficient to allow consumption of atmospheric methane. Analyses based on intact cores indicated that the extent of methane oxidation was highly dependent on oxygen availability, particularly as affected by benthic photosynthesis or the presence of algal mats. Methane emission and oxidation showed a light saturation response above 400 μEinsteins m−2 s−1. Both core and slurry analyses indicated that even short periods of anoxia resulted in losses of the capacity for methane oxidation after re-exposure to air. On the other hand, the presence of anoxia-insensitive organisms provided for a significant residual post-anoxia activity. Results from addition of nitrapyrin to the surface of intact cores indicated that shifts in methane emissions coincident with short-term changes in the availability of oxygen were the result of changes in methane oxidation, not methanogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb04078.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effects of substrate concentration, growth state, and oxygen availability on relationships among bacterial carbon, nitrogen and phospholipid phosphorus content (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 74 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The utility of phospholipid phosphorus (Plip-P) concentrations as a measure of microbial biomass is dependent upon the accuracy of the conversion factors used for relating Plip-P to cell carbon, nitrogen or weight. Mixed cultures enriched from marine sediments have been used to evaluate the reliability of these relationships as a function of substrate concentration, growth state and the presence of oxygen. Ratios of Plip-P to carbon and nitrogen were independent of growth state and substrate level but were sensitive to oxygen status. For aerobic incubations, average ratios of 190 and 730 μmol Plip-P/g carbon and nitrogen were obtained, respectively. Average ratios of 100 and 350 μmol Plip-P/g carbon and nitrogen were obtained from anaerobic incubations. As a result, it is not likely that a single conversion factor can be applied to samples from both aerobic and anaerobic systems. In addition, a limited survey of algal Plip-P, carbon and nitrogen concentrations indicates that the presence of a significant algal biomass can result in erroneous estimates of bacterial abundance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb04081.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Hyperproduction of TEM-1 beta-lactamase in clinical isolates of Escherichia coli serotype O15 (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 67 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract During an outbreak of infection with ampicillin-resistant, TEM-1 β-lactamase-producing Escherichia coli serotype O15, some strains were noted to differ from the majority in that they showed reduced susceptibility to amoxycillin/clavulanic acid (Augmentin), ureidopenicillins and first generation cephalosporins and produced increased amounts of β-lactamase. The plasmid from one such isolate was compared with that from an isolate that produced normal amounts of β-lactamase. Restriction analysis with EcoRI revealed extra fragments in the plasmid from the β-lactamase hyperproducer and use of DNA-DNA hybridisation with a biotinylated TEM-1 probe showed genetic rearrangement in the β-lactamase hyperproducer so that the TEM gene appeared to be present in larger amounts and was located on a smaller fragment than for the plasmid from the strain that produced normal amounts of β-lactamase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb04040.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...