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  • 1
    Series available for loan
    Series available for loan
    Cardium Formation, Edson area, Alberta (1970)
    Ottawa : Geological Survey of Canada
    Associated volumes
    Details Availability
    Call number: SR 90.0008(68-30)
    In: Paper
    Type of Medium: Series available for loan
    Pages: IV, 62 S. + 2 pl.
    Series Statement: Paper / Geological Survey of Canada 68-30
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Rehydration of Freeze-Dried Cultures of Lactic Streptococci (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Cell suspensions (0.2 ml each) of three lactic streptococci were freeze-dried from distilled water. In order to determine the optimum conditions of rehydration the effect of different factors such as composition, temperature, and pH of rehydrating media on viability of the freeze-dried cells of the lactic streptococci has been studied. Rehydration of freeze-dried cells with 10% solution of dextrose, sucrose or reconstituted skim milk at pH 6.5 and 22°C can be recommended as optimum conditions for maximum recovery of viable cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1982.tb10148.x
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  • 3
    Electronic Resource
    Electronic Resource
    PROTECTIVE EFFECT OF FORTIFIED SKIM MILK AS SUSPENDING MEDIUM FOR FREEZE DRYING OF DIFFERENT LACTIC ACID BACTERIA (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 39 (1974), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The efficacy of fortified skim milk was tested for improving cell survival of 23 different cultures of freeze-dried lactic acid bacteria. Except in the case of Streptococcus cremoris, Streptococcus thermophilus (two strains), Lactobacillus bulgaricus and Lacto-bacillus lactis, all other freeze-dried cultures of lactic acid bacteria showed improved cell survival.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1974.tb02969.x
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  • 4
    Electronic Resource
    Electronic Resource
    Canonical correlation analysis of abiotic and biotic variates in insect-infested grain bulks (1972)
    Springer
    Oecologia 8 (1972), S. 321-333 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The impact of insect infestation on several biotic and abiotic variates in 3 small bulk-wheat ecosystems was studied by measuring these variates at monthly intervals during 1969–1970. One ecosystem was insect-free, the second was artificially infested with Cryptolestes ferrugineus and Oryzaephilus surinamensis, and the third with Sitophilus granarius and Tribolium castaneum. The relationships between 8 environmental and 8 entomological and microbial variates were examined by canonical correlation analyses. The degree of predictability (R c 2 ) of the first pair of canonical variates in the 3 ecosystems ranged from 80% to 95%. The first 2 pairs of canonical variates were highly significant in all 3 analyses (P〈0.01). In the insect-free ecosystems the canonical variates revealed that temperature and the period of storage were the primary environmental antecedents involved and the criterion was composed primarily of the field fungus Alternaria and the storage fungus Aspergillus. In the second ecosystem uric acid level in the grain bulk was an additional environmental factor that affected the population of both species of insects and 3 kinds of fungi Altrnaria, Aspergillus, and Penicillium. In the third ecosystem temperature, time, uric acid and moisture interacted collectively, with density of insect populations, reduction of Alternaria, and increase of Aspergillus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367536
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  • 5
    Electronic Resource
    Electronic Resource
    Climate in relation to deterioration of stored grain (1973)
    Springer
    Oecologia 12 (1973), S. 69-88 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A hypothesis elucidating the basic relationship between abiotic climatic variates and the deterioration of stored grain by biotic agents was developed for the 41 crop districts in the Prairie Provinces of Canada. Principal component (7 variates measured) and canonical correlation (6 variates measured) analyses were applied to data from each of the 3 crop years (1967–1969), for each of the 3 principal component analyses and for each of the 3 canonical correlation analyses. The data consisted of crop district means of infestation reports from 2522 managers of grain elevators and also of representative meteorological observations from each crop district. The major variates measured were the number of reports of: hot spots, infestations of a) fungus beetles and mites, and b) Cryptolestes ferrugineus (Stephens), and grain fumigants. The climatic variates consisted of mean temperature, precipitation, and number of days above 20° C (68° F) for July, August and September. Three major components, which together explained 64–80% of the variation, indicated broadly similar trends in all analyses. The first component indicated that lower mean temperatures and larger numbers of cool days increased the incidence of fungus-induced hot spots in wet harvested grain. The second component indicated the extent of arthropod infestations: warmer weather increased C. ferrugineus infestation, whereas cooler weather increased infestation by mites and secondary insect species. The third component was a measure of precipitation. Canonical correlation analyses based on 1967 and 1969 data yielded canonical roots that were statistically insignificant at the 1% level. Analyses of 3 external abiotic and 3 biotic response variates based on 1968 data showed that only the first pair of canonical variates was significant, the degree of predictability (R c 2 ) being 56% (P〈0.01). The analyses revealed that lower temperatures, a greater number of cool days, and higher precipitation increased the number of hot spots in 1968 confirming the findings of the principal component analyses. The pattern of hot spot development in relation to climatic characteristics was similar in all crop districts for all years examined. There was a linear relationship between climatic and biotic variates for all these crop districts but the degree of relationship varied geographically. The first and second principal component values for each crop district were ranked and plotted on a climatic map of the Prairie Provinces. The ranking showed that the incidence of hot spots and arthropod infestations was highest in the Sub-boreal and Humid southeastern regions, whereas the incidence was lowest in the Dry Belt region. C. ferrugineus was most common in the Humid southeastern region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345471
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  • 6
    Electronic Resource
    Electronic Resource
    Population dynamics of stored-product mites (1973)
    Springer
    Oecologia 12 (1973), S. 315-327 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Population fluctuation patterns were determined during 1959–70 in wheat bulks in 2 granaries typical of those used on Manitoba farms for 7 kinds of mites. The patterns were bradly similar in the 2 granaries. Outbreaks of all mites except Tarsonemus granarius and Aëroglyphus robustus were unaffected by the prolonged storage of grain; those of Acarus siro and Cheyletus eruditus occurred in unusually high numbers periodically every 2–5 years, whereas Glycyphagus destructor and Androlaelaps casalis were present in relatively low numbers from the first year of storage. A rise in T. granarius population corresponded with grain age and the succession of microfloral species. Tydeid mites occurred periodically. Pricipal component analyses of up to 26 variates including various fungal species on one grain bulk ecosystem provided a “kaleidoscopic” view of interrelations and dynamics of acarine populations in the grain bulks. The combination of correlated variates of which mites are a part, varied from year to year. Four factors that regulate acarine numbers, particularly those of A. siro and its natural predator C. eruditus, were identified. These are: (i) basic determinants (moisture, temperature, food, and the intrinsic rate of increase of the species); (ii) the main regulator (temperature); (iii) influencers (seed cracks, microflora, dockage, etc.); and (iv) seasonal and cyclic regulators (seasonality in temperature and several density-dependent factors). Generalized diagrams of prey-predator interactions and multivariate interrelations of each kind of mite are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345046
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  • 7
    Electronic Resource
    Electronic Resource
    X-rayK-absorption edge interpretation and energy determination (1990)
    Springer
    The European physical journal 81 (1990), S. 229-232 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The low energy features of XANES (X-ray absorption near edge structure) in the X-rayK-absorption edge of transition metal systems have long been detected and attempts have been made to explain their origin. Only recently have some theoretical approaches based upon multiple scattering (MS) effects been applied in explaining the shape of theK-edge features. But the pre-edge shoulder, often labelled asB, has hitherto defied satisfactory explanation for its origin. The present work is an attempt in explaining the possible origin of this feature by using MS-theory to theK-edge XANES of some first row transition metal systems. The calculated energies using MS-formalism were found to be closer to the experimentally observed values for some systems of cobalt and copper. Using these results, theK-edge featuresA,B,C have been assigned to be originating from the resonance effects of scattering of the ejected photo-electron with the molecular potential set up by the central absorbing atom and its near neighbours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01309353
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  • 8
    Electronic Resource
    Electronic Resource
    Ochratoxin a production in Bavarian cereal grains stored at 15 and 19% moisture content (1992)
    Springer
    Archives of environmental contamination and toxicology 23 (1992), S. 259-265 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Wheat, barley, and maize, each in 15-kg parcels at 15 and 19% initial moisture content (IMC), were kept in a Bavarian farm granary from June through November 1990. During this period, the grain at each IMC was analyzed for mycotoxins and monitored for grain temperature, carbon dioxide, seed germination, and microfloral incidence and abundance. Barley and maize stored for 20 weeks at 19% IMC contained ochratoxin A in amounts of 70 and 90 μg/kg, respectively. This mycotoxin was not detected in wheat stored at 19% IMC, nor in the grains stored at 15% IMC. Aflatoxin B1, sterigmatocystin, citrinin, and zearalenone were also assayed but not detected in grains stored at either IMC. Principal component analysis of the data indicated that ochratoxin A was produced in a damp niche in maize, when abundant metabolic activity and CO2 production by Penicillium glandicola and Aspergillus spp. were common.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212284
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  • 9
    Electronic Resource
    Electronic Resource
    Biological, physical and chemical changes in stored wheat (1983)
    Springer
    Mycopathologia 82 (1983), S. 65-76 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Six lots of wheat from six farmers' bins in Manitoba were adjusted to a range of 5 moisture contents, held at 6 temperatures and sampled at 6 times during storage. After sampling, seeds were surface sterilized with mercuric chloride and subsamples plated on Czapek's agar, on filter paper moistened with water, or on filter paper moistened with a 7.5% sodium chloride solution. The microflora on the seed was determined, germination counts were made, and the seed was examined by government inspectors for its condition and grade. A total of 1192 samples were examined. In addition, 180 samples were subjected to a fat acidity test. Deterioration for each combination of temperature and moisture, the fungi involved, and the consequent effect on condition, grade and fatty acid content were observed. The effect of high moisture content (〉20%) and low temperatures (3–10 ° C) on infection of seed by Penicillium and the consequent effect on germination, condition, grade and fatty acid value are stressed. The interrelationship among fungi, and among fungi and temperature, moisture, storage time, fat acidity values and germination are indicated by correlation coefficient matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00437333
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  • 10
    Electronic Resource
    Electronic Resource
    Quality changes in granary-stored wheat at 15 and 19% moisture content (1984)
    Springer
    Mycopathologia 87 (1984), S. 115-120 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Half-bushel parcels of wheat at 15 and 19% moisture content (MC) were implanted in bulks of dry stored oats in a farm granary for 60 weeks to monitor quality changes. Temperature, MC, fat acidity value (FAV), oxygen and carbon dioxide levels, germination, microfloral incidence and abundance, and major storage mycotoxins (aflatoxins, sterigmatocystin, ochratoxin A, citrinin, penicillic acid) were monitored at two-week or four-week intervals during storage. Wheat storage at 19% MC was characterized by higher temperature, MC, FAV, carbon dioxide level, and microfloral abundance, and lower levels of oxygen and germination as compared to 15% MC wheat; no mycotoxins were detected at either moisture. Approximately 19% MC may represent a critical moisture limit for mycotoxin formation in granary stored wheat, given the indigenous mycoflora.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00436639
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