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  • 1980-1984  (194)
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  • 1
    Electronic Resource
    Electronic Resource
    A comparative study of photoadaptation in four diatoms isolated as endosymbionts from larger foraminifera (1982)
    Springer
    Marine biology 68 (1982), S. 193-197 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four endosymbiotic diatoms were isolated from 2 species of larger foraminifera collected in the Red Sea and Hawaii. The photoadaptive responses of the cultured diatoms were measured at 312, 19 and 7 μW cm-2. Two of the diatoms (Fragilaria shiloi and Nitzschia laevis), both isolated from Amphistegina lessonii, grew fastest at 312 μW cm-2. The other two diatoms (N. valdestriata and N. panduriformis) which were isolated from Heterostegina depressa, grew best at 19 μW cm-2. Of the four diatoms, F. shiloi grew best at high light levels. Also in F. shiloi, chlorophyll c content per cell was directly proportional to light intensity; in contrast chlorophyll a and carotenoids increased to maxima at 19 μW cm-2. The chlorophyll a and c and carotenoid content of N. valdestriata were also maximal at 19 μW cm-2. Photosynthetic rates, measured by respirometry, suggested that the diatoms were photoinhibited at higher light intensities and did well at moderately low light intensities (175μW cm-2). The photocompensation points of all 4 diatoms were about 2% of the light available in the spring at 1-m depth at Elat on the Red Sea. At Elat the photocompensation point would lie between 40 and 50 m if the algae were free in nature. The amount of attenuation of light by the shells of the host has not yet been measured. Presumably photocompensation of the algae within hosts is reached at depths less than 40 m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397606
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  • 2
    Electronic Resource
    Electronic Resource
    Reevaluation of the evidence for the generation of new lethal t haplotypes by mutation (1983)
    Springer
    Immunogenetics 18 (1983), S. 91-96 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00401359
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  • 3
    Electronic Resource
    Electronic Resource
    An alpha globin pseudogene is located within the mouse t complex (1984)
    Springer
    Immunogenetics 19 (1984), S. 368-368 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345413
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  • 4
    Electronic Resource
    Electronic Resource
    An alpha globin pseudogene is located within the mouse t complex (1984)
    Springer
    Immunogenetics 19 (1984), S. 125-130 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Restriction fragment length polymorphisms have been identified in the α-globin pseudogene carried on chromosome 17. Different inbred strains of mice carry one of two forms of the sequence, whereas all complete t haplotypes carry a third form. With the use of partial t haplotypes, the α-ψ44 sequence has been mapped to the distal end of the t complex. This sequence appears to be closely linked to the tufted locus in the t complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387855
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison of Volatiles Produced by Selected Pseudomonads on Chicken Skin (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Four pseudomonad cultures (one P. putida, one nonpigmented, and two P. fluorescens) were isolated from spoiled chicken breasts held at 2–6°C for 14 days. Each culture was grown on psychrotroph-free chicken skin for 14 days at 2–6°C. The volatiles produced by each organism were separated by high-resolution gas chromatography and identified by mass spectrometry. Some of the more significant volatile spoilage compounds produced by these microorganisms were sulfur-containing, e.g. methanethiol, dimethyl sulfide, propylene sulfide, and dimethyl disulfide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb09233.x
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  • 6
    Electronic Resource
    Electronic Resource
    EFFECT OF SODIUM CHLORIDE ON RESIDUAL NITRITE (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 45 (1980), 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 effect of sodium chloride on residual nitrite was studied in a model system, ground meat and bacon. The model system contained 10% bovine serum albumin, 156 ppm sodium nitrite and 0, 1.5, 2.5, or 3.5% sodium chloride. The ground pork system consisted of 156 ppm sodium nitrite and 0, 1.5, 2.5, or 3.5% sodium chloride. Bacon was made under pilot plant conditions to contain 156 ppm sodium nitrite and 0, 1.5, or 3.0% sodium chloride. The results showed that residual nitrite was lower in the presence of larger amounts of sodium chloride; however, if the effect of sodium chloride in decreasing pH and the effect of loss of water during cooking and storage were excluded, then sodium chloride did not cause significant decreases in residual nitrite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1980.tb02592.x
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  • 7
    Electronic Resource
    Electronic Resource
    Lability and Reactivity of Nonheme Protein-Bound Nitrite (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Nitrite treated nonheme protein was separated from the free nitrite of the reaction mixture by Sephadex G-15 column chromatography. Spectral analysis (absorbance at 330 nm) indicated that tryptophyl residues of the protein had been modified with the NO group. The protein-nitrite complex was not stable, decomposing faster at lower pH and higher temperature. As the extent of the decomposition increased with time, an increasing amount of nitrite was detected by the AOAC method, indicating that the Griess reagent reacted with nitrite after it was regenerated from the NO group. When myoglobin was incubated with the nitrosated protein, nitrosyl hemochrome could be extracted from the reaction mixture in the presence of ascorbic acid. The results indicate the potential reversibility of the protein-nitrite reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb09192.x
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  • 8
    Electronic Resource
    Electronic Resource
    ROLE OF NITRITE IN CURED MEAT FLAVOR: CHEMICAL ANALYSIS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 45 (1980), 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: Hams treated with 2.5% salt and varying concentrations of sodium nitrite, butylated hydroxytoluene (BHT), and citric acid were evaluated by means of thiobarbituric acid (TBA) values, formation of fluorescent products, hexanal and 2,4-decadienal, and sensory analyses. Results demonstrate that nitrite significantly reduces (p 〈 0.05) lipid oxidation in pork stored aerobically at 4°C. Meat treated with 0.02% BHT or 1000 mg/kg of citric acid also reduced TBA values, although these compounds were not as effective as 50 mg/kg of sodium nitrite. A significant relationship (p 〈 0.05) was established between off-odor/flavor formation and both TBA values and the production of fluorescent products during the first 7 days of storage. However, the relationship between fluorescent products and off-odors/flavors was not significant at 14 days. Significantly lower (p 〈 0.05) levels of hexanal and 2,4-decadienal were found in meat treated with nitrite, BHT or citric acid compared to samples containing only salt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1980.tb07472.x
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  • 9
    Electronic Resource
    Electronic Resource
    High-Speed Machining of Metals (1984)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 14 (1984), S. 231-278 
    Details
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ms.14.080184.001311
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  • 10
    Electronic Resource
    Electronic Resource
    High Water Levels in Ground-Water Dominant Lakes — A Case Study from Northwestern Wisconsin (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 18 (1980), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: An investigation into the cause of high lake levels during the early 1970's in a ground-water dominant lake in northwestern Wisconsin was conducted from December 1976 to July 1978, in part to address allegations by shoreline property owners that regulation of water levels in a reservoir 2.4 km south of the lake had caused the high lake levels. High lake levels also coincided with above average precipitation. Data collected during the study allowed the definition of the ground-water flow system around the lake and the calculation of the water budget for the lake. Field data indicated that there is no ground-water flow between the reservoir and the lake and that ground water flowing out of the reservoir is intercepted by a trough in the potentiometric surface. The trough is probably oriented along a permeable fault zone or a buried river valley. A ground-water flow model was used to determine whether increased recharge rates of the magnitude that probably occurred as a result of above average precipitation in the early 1970's would be sufficient to account for the observed rise in lake level or whether regulation of the water level in the reservoir could be expected to affect lake level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1980.tb03406.x
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