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  • Springer  (75)
  • American Physical Society  (24)
  • Blackwell Publishing Ltd  (12)
  • 1975-1979  (81)
  • 1970-1974  (30)
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Keywords
Publisher
Years
Year
  • 11
    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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  • 12
    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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  • 13
    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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  • 14
    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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  • 15
    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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  • 16
    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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  • 17
    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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  • 18
    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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  • 19
    Electronic Resource
    Electronic Resource
    Inhibition of parathyroid hormone-induced fetal rat bone resorption in vitro by nerve growth factor (1978)
    Springer
    Calcified tissue international 26 (1978), S. 203-208 
    Details
    ISSN: 1432-0827
    Keywords: Nerve growth factor ; Bone resorption ; Parathyroid hormone ; Insulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The effects of 7S nerve growth factor (NGF) and its isolated α, β, and γ subunits on bone resorption were assessed in a tissue culture system in which the degree of resorption was determined by measuring the release of45Ca from prelabeled fetal rat radii and ulnae. It was found that 7S-NGF, through the activity of its γ, subunit, inhibits parathyroid hormone (PTH)-stimulated but not-unstimulated bone resorption. The following observations suggest that γ-NGF, a trypsin-like molecule, blocks PTH-induced bone resorption by enzymatic degradation of PTH: (a) γ-NGF does not inhibit bone resorption stimulated by the steroid, 1,25-dihydroxycholecalciferol; (b) trypsin is as effective as γ-NGF in inhibiting PTH-stimulated bone resorption; (c) the PTH-inhibitory action of both γ-NGF and trypsin are eliminated by inactivating these enzymes with diisopropyl fluorophosphate; and (d) addition of γ-NGF to the cultures 2 days after the inclusion of PTH does not result in inhibition of bone resorption. Similarly, when the subunit is added to the culture medium before the hormone, there is no inhibition of resorption. The latter observation suggests that the target of γ-NGF is the PTH molecule rather than its membrane receptors. Crystalline bovine insulin inhibits the γ-NGF suppression of PTH-induced bone resorption. This effect, however, is not mimicked by the addition of zinc, which is present in commerical insulin preparations, to the culture medium. Consequently, insulin must inhibit NGF by some mechanism other than the influence of zinc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02013259
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  • 20
    Electronic Resource
    Electronic Resource
    Cell lineage in fracture healing in chimeric bone grafts (1979)
    Springer
    Calcified tissue international 27 (1979), S. 247-253 
    Details
    ISSN: 1432-0827
    Keywords: Osteoblast ; Osteoclast ; Osteoprogenitor cells ; Fracture ; Chimera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Previous studies have shown that differences in nuclear morphology are generally sufficient to determine the species origin of cells in interspecific grafts between the Japanese quail and domestic chicken. Most quail nuclei possess 1–3 large nucleolus-associated masses of heterochromatin. Chick cells, on the other hand, usually present a more diffuse, stippled distribution of nuclear heterochromatin. Quail embryonic limb rudiments, some with and some without established marrow cavities, were explanted and grown on the chorioallantoic membrane of the chick. Three to five days post-grafting, the explants were surgically fractured and allowed to heal. Tissues were collected and histologically processed during the latter period. The fractures healed completely within 5–6 days and no callus was established in the process. The nuclear staining pattern of the osteoblasts and osteocytes throughout the rudiments and at the fracture site indicated that they were derived from the graft. Possible sources for these cells included the periosteum, endosteum, and posthypertrophy chondrocytes. By contrast, most of the nuclei in the osteoclasts were chick-like and were apparently derived from cells originating in the host. Because the quail-like heterochromatin marker was normally present in a small number (2.5%) of chick osteoclast nuclei and was lacking in about 5% of native quail osteoclast nuclei, the precise extent of the participation of donor, i.e., quail bone and marrow stromal cells in osteoclast formation, could not be determined. However, the data suggest that in large measure the precursor cells for most osteoclasts were hematogenously derived and were carried to the grafted rudiments by the blood vascular system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441193
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