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  • Articles  (19)
  • Springer  (15)
  • Blackwell Publishing Ltd  (4)
  • American Physical Society (APS)
  • Springer Nature
  • 1975-1979  (19)
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  • Articles  (19)
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  • 1
    Electronic Resource
    Electronic Resource
    THE ALKYLBENZENES IN ROAST BEEF (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), 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 volatile components of roast beef were isolated by a specially designed gas entrainment apparatus. The isolated compounds were separated into acidic, basic and neutral fractions. The neutral fraction was further separated by repeated gas chromatography on two different stationary phases and collected as subfractions. The individual subfractions thus obtained were analyzed by gas chromatography-mass spectrometry. Mass spectral identifications were confirmed by comparing the mass spectra and relative retention times with authentic compounds. A total of 20 n-alkylbenzenes and substituted alkylbenzenes were positively identified, many for the first time in cooked beef. These alkylbenzenes are probably derived from the fat present in the beef by thermal oxidation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1977.tb01532.x
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  • 2
    Electronic Resource
    Electronic Resource
    PRELIMINARY IDENTIFICATION OF VOLATILE FLAVOR COMPOUNDS IN THE NEUTRAL FRACTION OF ROAST BEEF (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 44 (1979), 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 volatile flavor compounds (VFC) in the neutral fraction of roast beef flavor isolate were identified in this study. The VFC from 150 lb of eye round roast beef were isolated and separated into acidic, basic and neutral fractions. Since the latter fraction was the only one to have a pleasant roast beef-like aroma, it was the only fraction further analyzed. The components of the neutral VFC fraction were separated into relatively pure subfractions by repetitive gas chromatography and collection in “hairpin” cold traps. The relatively pure subfractions were then analyzed by GC-MS combination. More than 120 compounds were identified including a number of lactones, substituted aromatic compounds, furan compounds, and sulfur-containing compounds. The aforementioned classes of compounds may play significant roles in the roast beef flavor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1979.tb08465.x
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  • 3
    Electronic Resource
    Electronic Resource
    Piroplasms from Taiwanese Rodents (1977)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 24 (1977), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Piroplasms from naturally infected bandicoot rats, Bandicota indica (Hodgson), and spiny rats, Rattus coxinga (Swinhoe), from Taiwan caused parasitemias in a wide range of laboratory animals after syringe passage in laboratory rats. Bandicoot and spiny rats could be infected with heterologous piroplasms, but neither species was susceptible to infection with the Gray strain of Babesia microti (França). Nevertheless, the Taiwan piroplasms are probably a geographic strain of B. microti.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1977.tb00984.x
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  • 4
    Electronic Resource
    Electronic Resource
    DEEP FAT FRYING CHARACTERISTICS OF BUTTEROIL (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), 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: A study was undertaken to determine whether the addition of methylsiloxane (silicone) to butteroil would improve the chemical and physical stability of the butteroil during actual deep fat frying conditions, and whether the storage stability of potato chips fried in siloxanetreated butteroil would be increased. A deep fat frying study was performed using butteroil (BO), butteroil with 10 ppm of silicone (BOS), and a commercial corn oil containing silicone (CO). Potato slices were fried in the oils on a daily basis and evaluated for flavor using a trained organoleptic panel. The storage stability of the chips was also determined by means of the peroxide values and the Schaal oven test. The thermal stability of the oils was determined with the smoke point test, total acid content and nonurea adduct-forming esters (NUAFE). The results of this study showed that the addition of silicone to butteroil unproved its stability by decreasing its total acid content and NUAFE, by raising the smoke point and by lowering the degree of foaming. Also, the flavor of the BOS chips retained their high acceptability and preference over the BO chips. The storage stability of the BOS chips was also improved as shown by lower peroxide values and longer Schaal oven tests during storage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1977.tb12678.x
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  • 5
    Electronic Resource
    Electronic Resource
    Quantum chemical study of relative reactivities of a series of amines and nitriles: Relevance to prebiotic chemistry (1975)
    Springer
    Journal of molecular evolution 5 (1975), S. 131-152 
    Details
    ISSN: 1432-1432
    Keywords: Quantum Calculations ; Reactivity ; Nitriles ; Amines Prebiotic Chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using the Iterative Extended Huckel Theory (IEHT) calculations of the electron distribution and orbital energies of a series of thirteen amines, nitriles and amino-nitriles relevant to prebiotic and cosmo-chemistry have been carried out. Ground state properties such as the energy and nature of the highest occupied (HOMO) and lowest empty (LEMO) molecular orbitals, net atomic charges and number of nonbonding electrons have been identified as criteria for correlating the relative nucleophilicity of amine and nitrile nitrogens and the electrophilicity of nitrile and other unsaturated carbon atoms. The results of such correlations can be partially verified by known chemical behavior of these compounds and are used to predict and understand their role in prebiotic organic synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01732518
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  • 6
    Electronic Resource
    Electronic Resource
    The possible role of solid surface area in condensation reactions during chemical evolution: Reevaluation (1976)
    Springer
    Journal of molecular evolution 8 (1976), S. 357-380 
    Details
    ISSN: 1432-1432
    Keywords: Clays ; Apatite ; Fluctuating System ; Prebiotic Environments ; Chemical Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Published data on adsorption and condensation of amino acids, purine and pyrimidine bases, sugars, nucleosides, and nucleotides are analyzed in connection with Bernal's hypothesis that clays and other minerals may have provided the most likely surface for adsorption and condensation of these molecules in prebiotic times. Using surface concentration and reaction rate as the main criteria for the feasibility of condensation reactions, four types of prebiotic environments were analyzed: (1) an ocean-sediment system, (2) a dehydrated lagoon bed produced by evaporation, (3) the surface of a frozen sediment, and (4) a fluctuating system where hydration (rainstorms, tidal variations, flooding) and dehydration (evaporation) take place in a cyclic manner. With the possible exception of nucleotides, low adsorption of organomonomers on sediment surfaces of a prebiotic ocean (pH 8) is expected, and significant condensation is considered unlikely. In dehydrated and frozen systems, high surface concentrations are probable and condensation is more likely. In fluctuating environments, condensation rates will be enhanced and the size distribution of the oligomers formed during dehydration may be influenced by a “redistribution mechanism” in which adsorbed oligomers and monomers are desorbed and redistributed on the solid surface during the next hydration-dehydration cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01739261
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  • 7
    Electronic Resource
    Electronic Resource
    Quantum chemical study of the thermodynamics, kinetics of formation and bonding of H2CN relevance to prebiotic chemistry (1975)
    Springer
    Origins of life and evolution of the biospheres 6 (1975), S. 117-125 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Using the Iterative Extended Huckel Theory (IEHT), energy-conformation studies have been carried out for H2CN (I),trans-HCNH (IIA), andcis-HCNH (IIB), three possible isomers formed by addition of a hydrogen atom to hydrogen cyanide. Calculations show that the order of decreasing thermodynamic stability is I≫IIA〉IIB. Additionally, from calculated energies along simulated reaction pathways, the formation of I from HCN+H appears to be kinetically favored over IIA. Calculated properties of the minimum energy conformers of I and IIA are described and the potential role of H2CN (I) as a reactive intermediate in prebiotic organic synthesis and its possible relevance to interstellar organic chemistry are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01372396
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  • 8
    Electronic Resource
    Electronic Resource
    A general packing algorithm for multidimensional resource requirements (1977)
    Springer
    International journal of parallel programming 6 (1977), S. 131-149 
    Details
    ISSN: 1573-7640
    Keywords: Algorithm ; heuristic ; memory allocation ; packing ; space utilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Many problems in resource allocations, memory allocation, and distributed computer system design can be formulated as problems of packing variablesized items into fixed-sized containers in order to minimize the total number of containers used. In this paper, a generalized packing algorithm that encompasses many well-known heuristic packing algorithms is proposed. Simulation results on this generalized packing algorithm are described, and their implications are discussed. The objective of this paper is to investigate the performance of various heuristic packing algorithms within a general framework, to obtain numerical estimates on their efficiency, and to provide guidelines on the use of these algorithms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00999302
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  • 9
    Electronic Resource
    Electronic Resource
    Die Eigenschaften von strukturellen homogenen Poly(-1-vinyluracilen) und deren Wechselwirkung mit Polynucleotides (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 270-270 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01470273
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  • 10
    Electronic Resource
    Electronic Resource
    Der Einfluß der Korrektur für die Krümmungsabhängigkeit der Oberflächenspannung auf das Ergebnis der Porenverteilungs-Analyse (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 1026-1027 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01776300
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