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  • Blackwell Publishing Ltd  (21)
  • Springer Nature  (21)
  • American Institute of Physics (AIP)
  • Copernicus
  • 2020-2024  (1)
  • 1955-1959  (41)
  • 1
    Electronic Resource
    Electronic Resource
    Growing Ochromonas malhamensis Above 35°C. (1957)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 4 (1957), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SUMMARY. Ochromonas malhamensis (Pringsheim strain) can be grown above 35.5°C.; below 35°, the previous chemically defined medium supports dense growth. The B12 and thiamine requirements rise steeply with temperature, and growth promotion by folic acid emerges; folic acid spares the enhanced B12 requirement. B12 is spared also, perhaps wholly bypassed, by purines + pyrimidines + amino acids (below 35°, exogenous purines, pyrimidines, and folic acid have little effect). Requirements also emerge for glycine (spared by serine), valine and isoleucine (their ratio is critical; leucine and threonine assist in maintaining a good balance), and, at very slightly higher temperatures, phenylalanine, tryptophan, cystine, and lysine. Requirements for Mg, Fe, Zn, and Mn appear to rise steeply with temperature; metal toxicities have to be circumvented carefully. The proportion of histidine + arginine to carbohydrate has to be increased, and a Krebs-cycle component such as succinic acid becomes stimulatory. At 36.3–36.7°, a further supplement of crude natural materials such as an autoclaved suspension of Ochromonas cells is needed. Relevance of these findings to fever stress in vertebrates, general mitochondrial function, and repair of radiation damage, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1957.tb02518.x
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  • 2
    Electronic Resource
    Electronic Resource
    A Comparative Biochemical Study of Two Species of Ochromonas (1959)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 6 (1959), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The heterotrophic, phototrophic, and phagotrophic nutrition of the chrysomonad flagellates Ochromonas malhamensis and O. danica were compared. Unlike O. malhamensis, O. danica, which is much richer in chloroplast pigments, grew readily photoautotrophically in a substrate-free medium in 5% CO2. Utilization of bound biotin in bacterial (Thiobacillus) bodies served to demonstrate phagotrophy in both flagellates. This nutritional versatility suggests that this group of flagellates will be exceptionally valuable for studying the evolutionary steps connecting photoautotrophy, heterotrophy, and phagotrophy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1959.tb04369.x
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  • 3
    Electronic Resource
    Electronic Resource
    Lankesterella corvi n. sp., a Blood Parasite of the English Rook, Corvus f. frugilegus L. (1959)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 6 (1959), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Lankesterella corvi n. sp. (Coccidia, Eimeriidae, Cryptosporidiinae) is described from the rook, Corvus f. frugilegus L. in England. It was found in 36 of 196 fledged rooks less than 1-year old, but not in 25 nestlings or 38 adults. It was not found in 71 jackdaws (C. monedula spermologus) or in 110 other birds of 16 species.Mature sporozoites were found in the erythrocytes and occasionally in other blood cells. They were 6.2 times 2.5 μ, with a central, band-like nucleus, and cytoplasm which failed to stain with Giemsa's stain. Gametogonic and sporogonic stages, found in the bone-marrow of one bird, resembled corresponding stages of Eimeria.A fledgling rook was infected experimentally by inoculation of a blood and tissue suspension from an infected bird. Sporozoites appeared in its blood 4 days after inoculation. They appeared to increase slightly in size and their cytoplasm lost its initial affinity for Giemsa's stain during the next few days. Engorged mites (Ornithonyssus sylviarum) from the experimentally infected rock contained unchanged sporozoites but no developmental stages of the parasite. A canary could not be infected by intraperitoneal inoculation and feeding of such mites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1959.tb04363.x
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  • 4
    Electronic Resource
    Electronic Resource
    A New Vector of Haemoproteus colmubae in England (1957)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 4 (1957), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SUMMARY. Haemoproteus columbae of English wood pigeons (Columba palumbus palumbus L.) was found to undergo sporogony in Ornithomyia avicularia. It is suggested that this insect is a vector of H. columbae, in spite of the failure of six attempts to transmit the haemosporidian to uninfected domestic pigeons (C. livia var. domestica) by the bite, or injection, of infected O. avicularia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1957.tb02509.x
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  • 5
    Electronic Resource
    Electronic Resource
    STUDIES ON THE ROOT DEVELOPMENT OF HERBAGE PLANTS (1957)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 12 (1957), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The influence of defoliation on the root, stubble and herbage weights of perennial ryegrass during establishment was studied on spaced plants in the greenhouse and field.In the greenhouse trial the rate of root elongation was reduced by a single defoliation. In both the field and greenhouse, cutting reduced the number of roots and tillers per plant but increased the number of roots per tiller. A few weeks after defoliating plants in the field there was a lower root weight on the cut plants than on the uncut. Eventually the influence of a single cut disappeared, but if the cutting was in the laie summer or autumn the plants commenced the winter with a smaller amount of root and stubble, and this appeared to have a deleterious effect on the earliest spring growth.Herbage growth in March and April was positively correlated with both root and stubble weights in the previous November.As the number of cuts during the establishment period (March-November) was increased from 0–4 the root and stubble weight per plant progressively decreased.The root and stubble weights decreased during the winter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1957.tb00099.x
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  • 6
    Electronic Resource
    Electronic Resource
    STUDIES ON THE ROOT DEVELOPMENT OF HERBAGE PLANTS (1959)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 14 (1959), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Herbage, stubble and root weights were recorded for thirteen months on various leys subjected to two treatments differing in frequency of cutting.The root-weight per unit area of a ryegrass/white-clover ley was not affected by the frequency of cutting, but the less frequently cut plots had fewer tillers per unit area; the root- and stubble-weight per tiller was, therefore, higher on the less frequently cut plots, On a cocksfoot ley the root-weight was not affected by the cutting treatment, but in late summer and early autumn the stubble-weight was considerably higher on the less frequently cut plots.When cocksfoot was grown in rows 2 feet apart, the more frequent cutting decreased both the root- and stubble-weight.On grass leys root-weights were heaviest in the summer and thereafter decreased until the following spring.The root-weight of lucerne decreased from May to July, increased to a maximum in December and then decreased in weight. The changes in root-weight under lucerne leys were mainly due to changes in the weight of the tap-roots.The vertical distribution of roots was recorded, and, in the case of the cocksfoot in rows, the lateral distribution of roots is also given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1959.tb01000.x
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  • 7
    Electronic Resource
    Electronic Resource
    STUDIES ON THE ROOT DEVELOPMENT OF HERBAGE PLANTS (1957)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 12 (1957), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effects of cutting on the root, stubble and herbage growth of perennial ryegrass during establishment was studied under sward conditions.Although a few weeks after a cutting treatment there was a smaller root weight on the cut than on the uncut swards, this difference eventually disappeared.By the autumn the frequently cut swards had considerably more plants and tillers per unit area than the uncut plots. As a result of these changes in plant density the root weight per unit area of the sward was not decreased by increasing the cutting frequency during establishment. However, the root weight per plant (and per tiller) was decreased by increases in the cutting frequency.The root and stubble weights increased during the spring, summer and early autumn of the first year and decreased during the winter. In the second season the root weight increased to a maximum in December whilst the stubble weight rose during the spring and summer and decreased after September.Although the percentage of total soluble carbohydrate was consistently higher in the stubble than the roots or herbage the quantity was similar in both roots and stubble, and in these organs the major soluble carbohydrate was fructosan.During the winter both the percentage and the total quantify of soluble carbohydrate in the stubble and roots decreased considerably.Herbage growth in February and March was not correlated with the root weight per unit area in the previous autumn but was positively correlated with the root weight per plant. The highest herbage yield in the early spring came from plots which were leniently treated in the previous autumn: these plots had a low plant and tiller density but the root weight per plant or per tiller was relatively high.In April the rate of herbage growth tended to be positively correlated with the sward density. In May and June the highest herbage yields came from the open swards. It was suggested that during this latter period moisture, and/or nitrogen, may have been the limiting factor, so that the open sward benefited from less interplant competition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1957.tb00972.x
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  • 8
    Electronic Resource
    Electronic Resource
    ERRORS OF THE SECOND KIND IN AN ACID THRESHOLD TEST (1958)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 23 (1958), 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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1958.tb17552.x
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  • 9
    Electronic Resource
    Electronic Resource
    GENERAL CONSIDERATIONS IN THE USE OF MICROORGANISMS IN SCREENING ANTITUMOR AGENTS (1958)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 76 (1958), 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.1749-6632.1958.tb54864.x
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  • 10
    Electronic Resource
    Electronic Resource
    POSSIBLE UTILITY OF THE ROUS SARCOMA FOR ANTITUMOR SCREENING (1958)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 76 (1958), 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.1749-6632.1958.tb54904.x
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