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  • Blackwell Publishing Ltd  (97)
  • Oxford University Press  (70)
  • Nature Publishing Group  (38)
  • American Geophysical Union (AGU)
  • 1995-1999  (92)
  • 1985-1989  (105)
  • 1935-1939  (8)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    In Vitro Excystation of Spironucleus muris (1996)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 43 (1996), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . In vitro excystation of Spironucleus muris cysts, purified by sequential sucrose and Percoll gradients from mouse feces, was studied. Three in vitro excystation procedures, used for Giardia, were assessed to determine the most useful method. Excystation was monitored by light microscopy and subsequently characterized by transmission and scanning electron microscopy. Spironucleus muris excysted routinely at a level greater than 90% when induced in Hanks’ balanced salt solution containing sodium bicarbonate at pH 2.0 and transferred to Tyrodes’ salt solution as an excystation medium. Similarly, high rates of excystation were recorded after induction of S. muris cysts in 0.1 M potassium phosphate buffer (pH 7.0) with sodium bicarbonate and excystation in trypticase-yeast extract-iron medium (TYI medium) or phosphate-buffered saline. A lower rate and percentage of excystation were observed after induction of S. muris cysts in an aqueous hydrochloric acid solution (pH 2.0) followed by excystation in TYI medium. All excystation methods produced extremely active S. muris trophozoites with normal morphology. Nonexcysting S. muris cysts have a wall composed of an outer fibrous and an inner membranous portion. Following induction, numerous vesicles appeared in the peritrophic space. Excystation began by the cyst wall opening at one pole, and the anterior part of the trophozoite protruding from the cyst wall. The trophozoite emerged progressively from the cyst wall and the empty cyst wall appeared to collapse. Excysted trophozoites exhibited normal morphological features of S. muris trophozoites isolated from the mouse intestine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1996.tb02473.x
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  • 2
    Electronic Resource
    Electronic Resource
    Large European manufacturers and the management of R&D (1986)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 16 (1986), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: At the end of 1984, for the third consecutive year, a research team from INSEAD administered a survey of the largest manufacturers in Europe. This survey attempts to provide an insight into the technological and manufacturing strategy designed and implemented by these large manufacturers.Each year since 1982 about 150 companies have completed the questionnaire, and of these 150 replies about one third are repeat answers. The database thus covers about 350 companies. As a consequence this allows us not only to analyse the static picture for a single year, but also to draw a dynamic picture of how thinking about technological and manufacturing strategy is changing within the European Manufacturing Industry.An analysis of the questionnaire's results allows us to assert some hypotheses about:a. Changes in the length of the product lifecycle.b. The importance of process engineering and proprietary process know-how.c. The interface between manufacturing and research and development as perceived by the manufacturing side.Since a similar survey is conducted for North America and Japan at the same time, it is possible to posit the European manufacturers vis-à-vis their global competitors for some of these issues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1986.tb01161.x
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  • 3
    Electronic Resource
    Electronic Resource
    Global R&D management (1989)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 19 (1989), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: AbstractGlobal R&D management, the management of company R&D effort distributed over different countries, a task that concerns multinational firms, has not been widely studied. The authors have therefore carried out in-depth studies of global R&D conducted by 7 European and 15 Japanese companies. Their objective was to identify ‘best practice’ and so construct a framework for future research.The authors' conclusions are as follows. Globalisation, that is decentralisation of R&D, has become a necessity for multinationals as a result of the localisation of competition, of product life becoming shorter than development time, and the need to locate laboratories near sources of new technological know-how.Because foreign acquisitions often lead to the acquisition of laboratories, questions are raised about how best to integrate them with the administrative practices of the ‘home’ organization, whether to reorganize them or to close them down. When it is necessary to set up a new foreign-based laboratory deciding its exact location will require the weighing of factors such as whether the activities are to be market or process oriented, where on the R to D scale the activities will be placed, and how far direction of the laboratory's programmes and work will be decentralised.Global management also demands special attention to the building of an open communication network among the laboratories, the best form of which has yet to be determined. The main concern in human resource management will be how to select and develop an internationally oriented management corps and how to train R&D professionals to communicate across sites.If globally dispersed R&D laboratories are to be most effectively used then a new framework for their management needs to be developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1989.tb00634.x
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  • 4
    Electronic Resource
    Electronic Resource
    The way forward in the strategic management of technology (1988)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 18 (1988), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1988.tb00577.x
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  • 5
    Electronic Resource
    Electronic Resource
    Risk and Return to Housing, Tenure Choice and the Value of Housing in an Asset Pricing Context (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Real estate economics 24 (1996), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Homeowners do not diversify their risky home equity because of fixed costs of issuing securities and information costs. An asset pricing model is developed for homeowners with the undiversifiable home equity asset. Homeowner value and house value to diversified landlords are compared, and a tenure choice equation is developed. We demonstrate the existence of a rational expectations equilibrium under appropriate conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1540-6229.00683
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  • 6
    Electronic Resource
    Electronic Resource
    FORECAST EVALUATION OF LIVINGSTON DATA ON INFLATION RATES AND INFLATION UNCERTAINTY (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Decision sciences 16 (1985), S. 0 
    Details
    ISSN: 1540-5915
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Livingston data on expected inflation rates have been used extensively in the financial literature, especially in investgating the relationship between nominal interest rates and expected inflation rates; however, the data have not been subjected to a thorough analysis of forecast accuracy. The objective of this paper is to analyze the forecast properties of Livingston data using a wide variety of time and frequency domain methods over an extended sample period and for selected subperiods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-5915.1985.tb01481.x
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  • 7
    Electronic Resource
    Electronic Resource
    A study of bacteria present within unfertilized salmon eggs at the time of spawning and their possible relation to early lifestage disease (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 10 (1987), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The eggs of 30 female chinook salmon, Oncorhynchus tshawvtscha (Walbaum), were collected at spawning. Some eggs from each fish were collected for bacteriologic study. Two salmon produced eggs judged to be of poor quality which were not used. The remaining 28 of the 30 groups of eggs were fertilized from a single sperm pool and the eggs incubated in separate groups. Mortality data on the developing salmon were recorded regularly through the twelfth week on feed. Unfertilized eggs from each group were surface-disinfected with an iodine solution, then crushed and subjected to a culture procedure designed to permit growth of as many bacterial types as possible. Bacteria were cultured and identified, and a comparison made of the types of organisms present in eggs from groups which later incurred high or low mortalities. Bacteria were recovered from both groups of salmon eggs. Although no single organism could be identified as a cause of increased mortality, the more frequent occurrence in the eggs of the ‘high mortality’ group of species of Vibrio, Listeria, Corynebacterium and Staphylococcus suggests that these bacteria may play a role. It is suggested that the cause of so-called early lifestage disease of salmon is multifactorial.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1987.tb01061.x
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  • 8
    Electronic Resource
    Electronic Resource
    ASPECTS OF THE UNDERWATER LIGHT FIELD OF EIGHT CENTRAL NEW YORK LAKES (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 23 (1987), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The underwater light field of eight central New York lakes, which represent a wide range of trophic state, was characterized through paired measurements of Sechi disc transparency (SD, m) and diffuse light attenuation (Kd, m−1). A total of 90 paired measurements are included in the data base. Substantial variability in the Kd SD product with time within individual systems, and amongst systems, was observed, which indicates differences in the relative contributions of absorption and scattering to attenuation. More than 50 percent of the temporal variability in Kd was attributable to attendant variations in chlorophyll a (C, mg m−3) in only two of the lakes. Estimates of the adsorption (a, m−1) and scattering (b, m−1) coefficients based on paired Kd and SD measurements compared well with more precise determinations available for one of the lakes. Determinations of a and b for the eight lakes, from SD and Kd measurements, indicated great system-specificity and temporal variability in these characteristics. The temporal variability in relative contributions of a and b to Kd is consistent with covariation of different attenuating components and the lack of correlation between C and Kd in most of the study lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1987.tb00872.x
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  • 9
    Electronic Resource
    Electronic Resource
    IMPACTS OF CLIMATE CHANGE ON AQUATIC ECOSYSTEM FUNCTIONING AND HEALTH (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 35 (1999), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : We review published analyses of the effects of climate change on goods and services provided by freshwater ecosystems in the United States. Climate-induced changes must be assessed in the context of massive anthropogenic changes in water quantity and quality resulting from altered patterns of land use, water withdrawal, and species invasions; these may dwarf or exacerbate climate-induced changes. Water to meet instream needs is competing with other uses of water, and that competition is likely to be increased by climate change. We review recent predictions of the impacts of climate change on aquatic ecosystems in eight regions of North America. Impacts include warmer temperatures that alter lake mixing regimes and availability of fish habitat; changed magnitude and seasonality of runoff regimes that alter nutrient loading and limit habitat availability at low flow; and loss of prairie pothole wetlands that reduces waterfowl populations. Many of the predicted changes in aquatic ecosystems are a consequence of climatic effects on terrestrial ecosystems; shifts in riparian vegetation and hydrology are particularly critical. We review models that could be used to explore potential effects of climate change on freshwater ecosystems; these include models of instream flow, bioenergetics models, nutrient spiraling models, and models relating riverine food webs to hydrologic regime. We discuss potential ecological risks, benefits, and costs of climate change and identify information needs and model improvements that are required to improve our ability to predict and identify climate change impacts and to evaluate management options.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1999.tb04222.x
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  • 10
    Electronic Resource
    Electronic Resource
    INACTIVATION OF GIARDIA MURIS CYSTS BY CHLORAMINES (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 25 (1989), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : In a study to measure the efficacy of chioramines at inactivating Giardia cysts, the ability of cysts to excyst was measured after exposure to different concentrations of chloramines, for different times, and at different temperatures and pH. The chloramines were generated by mixing ammonium sulfate and sodium hypochlorate in water to approximate a 7:1 chlorine:ammonia ratio by weight. Times of 40, 80, 180, and 270 minutes; temperatures of 3, 10, and 18°C; target chioramine concentrations of 0.4, 1.4, 2.0, and 2.6 mg/L; and pH of 7.0 and 8.5 were the actual values tested. The combinations of these variables that were able to inactivate 〉99.8 percent of the cysts were a minimum chloramine concentration of 2.26 mg/L applied for 270 minutes at a water temperature of 10°C; and at 18°C, averaged minimum chloramine concentrations of 2.14 and 1.55 mg/L applied for 180 and 270 minutes, respectively. The minimum CT values corresponding to these combinations capable of 〉99.8 percent cyst inactivation, are 610 at 10°C and 385 at 18°C. Temperature was noted to exert a major effect on the ability of chloramines to inactivate cysts. Modifications of the methods used to generate chloramines may have an effect on the capacity of this disinfectant to inactivate cysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1989.tb03069.x
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