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  • Springer  (77)
  • American Physical Society  (32)
  • Blackwell Publishing Ltd  (14)
  • 1975-1979  (81)
  • 1970-1974  (30)
  • 1950-1954  (12)
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Keywords
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Year
  • 11
    Electronic Resource
    Electronic Resource
    The Intracellular Location of Particulate-Bound Polyphenol Oxidase in Avocado Mesocarp (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 45 (1979), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Polyphenol oxidase of avocado mesocarp exists in a supernatant and a participate fraction. Isolation conditions were sought where maximal polyphenol oxidase activity could be retained in the particulate fraction. More polyphenol oxidase was associated with the 270–2000 g pellet than with the 2000–12,000 g pellet.Analysis of the particulate polyphenol oxidase on linear sucrose density gradient revealed two relatively heavy peaks. The data showed that the major part of polyphenol oxidase was not a constituent of chloroplasts, chromoplasts or mitochondria. The closeness of the positions of polyphenol oxidase and of catalase in both the green and the yellow zones of the mesocarp established that most of the particulate polyphenol oxidase of avocado is associated with microbodies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1979.tb01692.x
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  • 12
    Electronic Resource
    Electronic Resource
    The Ultrastructure of Polytomella agilis (1970)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 17 (1970), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS Motile cells and cysts of Polytomella agilis, obtained over the entire growth cycle, were examined by electron microscopy. In typical late log phase cells there is a concentric arrangement of the internal organelles around the centrally located nucleus. Lying just beneath the plasma membrane is a peripheral band of elongate mitochondria. Numerous well defined Golgi bodies are also distributed around the nucleus. Vesicles associated with the Golgi body increase in size with distance from the secretory edges of the organelle. Cytoplasmic membranes with associated ribosomes are found between the mitochondrial and Golgi regions. A layer of slender membrane-limited structures is located near the mitochondrial layer. These organelles, which resemble proplastids, become highly branched during late log and early stationary phase, reaching maximum development in late stationary and early pre-cyst stages.Large storage granules of varying density are found within the cell. The PAS-positive granules have been isolated and shown to contain starch. There is an increase in the amount of this storage material as the cells enter the stationary phase.The remainder of the cytoplasmic matrix is finely granular and contains numerous free ribosomes except in the region of the anterior papilla. Four flagella arise from basal bodies at the anterior end of the cell.The cyst is characterized by a thick multi-layered cell wall whose electron density obscures the limiting plasma membrane. Large storage granules are located close to and often in contact with the periphery of the cell, suggesting their involvement in the process of cell wall deposition.Altho mitochondria can still be seen in the mature cyst, other cytoplasmic organelles often appear atypical. The mature cyst has an irregular profile possibly due to shrinkage from dehydration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1970.tb04747.x
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  • 13
    Electronic Resource
    Electronic Resource
    Factors Affecting the Rate of Photophosphorylation by Isolated Chloroplasts of Euglena gracilis (1970)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 17 (1970), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS The rate of photophosphorylation by Euglena chloroplasts depends not only on the physiologic stage of cell growth but also on the stage of development of chloroplasts in these cells at the time of harvesting. Both of these processes can be markedly influenced by a number of environmental factors; they are affected neither in a parallel manner nor completely independent of each other. In addition, the rate of photophosphorylation of chloroplasts can also be greatly affected by the conditions employed for their isolation. After investigating the various environmental factors both during cell growth and chloroplast isolation, we have developed a procedure which increased the photophosphorylation rate of our chloroplast preparations more than 5-fold, giving a specific activity in the range of 100-150 μmoles ATP/mg chlorophyll/hr routinely. The procedure is simple, needs no special equipment and requires only 2 or 3 days for cell growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1970.tb04728.x
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  • 14
    Electronic Resource
    Electronic Resource
    CELL-LINED, NONWOVEN MICROFIBER SCAFFOLDS AS A BLOOD INTERFACE (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 283 (1977), 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.1749-6632.1977.tb41787.x
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  • 15
    Electronic Resource
    Electronic Resource
    A novel fibre-optic temperature probe (1977)
    Springer
    Optical and quantum electronics 9 (1977), S. 540-544 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01208767
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  • 16
    Electronic Resource
    Electronic Resource
    The effect of pressure on the ionization of water at various temperatures from molal-volume data1 (1972)
    Springer
    Journal of solution chemistry 1 (1972), S. 309-327 
    Details
    ISSN: 1572-8927
    Keywords: Effect of pressure ; ionization of water ; molal volume
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The apparent molal volumes of dilute (0.002 to 1.0m) aqueous HCl and NaOH solutions have been determined at 0, 25, and 50°C and NaCl solutions at 50°C. The partial molal volumes ( $$\bar V$$ ) of HCl, NaOH, and NaCl solutions have been determined from these apparent molal volumes and other reliable data from the literature. The partial-molal-volume changes ( $$\Delta \bar V_1 $$ ) for the ionization of water, H2O→H++OH−, have been determined from 0 to 50°C and 0 to 1m ionic strength from the partial molal volumes of HCl, NaOH, NaCl, and H2O. The partial molal compressibilities ( $$\bar K$$ for HCl, NaOH, NaCl, and H2O have been estimated from data in the literature and used to determine the partial molal compressibility changes ( $$\Delta \bar K_1 $$ ) for the ionization of water from 0 to 50°C and 0 to 1m ionic strength. The effect of pressure on the ionization constant of water has been estimated from partial-molal-volume and compressibility changes using the relation $$RTln(K^P /K) = - \Delta \bar V(P - 1) + \tfrac{1}{2}\Delta \bar K(P - 1)^2 $$ from 0 to 50°C and 0 to 2000 bars. The results agree very well with the directly measured values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00715990
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  • 17
    Electronic Resource
    Electronic Resource
    Book reviews (1970)
    Springer
    Astrophysics and space science 8 (1970), S. 141-142 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651665
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  • 18
    Electronic Resource
    Electronic Resource
    Production site, partial composition and olfactory perception of a pheromone in the male hide beetle (1978)
    Springer
    Naturwissenschaften 65 (1978), S. 543-545 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00439806
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  • 19
    Electronic Resource
    Electronic Resource
    On the estimation of worker entry intervals into pesticide treated fields with and without the exposure of human subjects (1975)
    Springer
    Bulletin of environmental contamination and toxicology 13 (1975), S. 506-512 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01721861
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  • 20
    Electronic Resource
    Electronic Resource
    Einfluß von Coffein auf den Seruminsulinspiegel während des i. v. Glucosetoleranztestes bei einigen Patienten mit chemischem Diabetes (1976)
    Springer
    European journal of nutrition 15 (1976), S. 151-155 
    Details
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary Nine mild male diabetic patients were studied by intravenous glucose tolerance tests with and without pretreatment with caffeine. The dose of caffeine was 90 mg given as 195 mg of caffeine citrate. The parameters measured were blood glucose and serum insulin. Caffeine given 2 hours previously did not affect the mean glucose disappearance rate of the group, however, those with the highest rates did show a reduced rate after caffeine. Insulin levels showed a decrease Particularly during the first five minutes after glucose. This finding was present Particularly in those patients who exhibited the larger first peak. It is possible that a relationship exists between the magnitude of the caffeine effect upon early insulin secretion and the glucose disappearance rate.
    Notes: Zusammenfassung Bei 9 Patienten mit chemischem Diabetes wurde der Einfluß von 90 mg Coffein p.o. auf Blutzucker und Seruminsulin während eines intravenösen Glucosetoleranztestes untersucht. Im Durchschnitt wiesen die mit Coffein-Tabletten behandelten Patienten während des intravenösen Glucosetoleranztests einen geringfügig höheren Blutzuckerspiegel auf als bei Gabe von Placebo. Die Eliminationskonstante K für Glucose wurde bei den Patienten, deren K über 1,0 lag, geringfügig erniedrigt, bei solchen mit niedrigerem Ausgangs-K nicht verändert oder geringfügig erhöht. Bei den Patienten, bei denen während des intravenösen Glucosetoleranztests noch eine deutliche Zweigipfligkeit der Seruminsulinkurve zu erkennen war, fehlte der 1. Gipfel, wenn sie mit Coffein vorbehandelt waren. Bei den Patienten, die auf den intravenösen Glucosetoleranztest praktisch nicht mehr mit einer Insulinsekretion reagierten, wurde letztere durch Coffein nicht beeinflußt. Unsere Ergebnisse lassen vermuten, daß 90 mg Coffein p.o. während des intravenösen Glucosetoleranztests die 1. Phase der Insulinsekretion hemmt und daß damit die Sofortreaktion des Organismus gegenüber der Glucosezufuhr vermindert wird. Dagegen wird bei bereits stark eingeschränkter Insulinsekretion diese durch Coffein weder verbessert noch verschlechtert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02018435
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