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  • 1
    Electronic Resource
    Electronic Resource
    Dynamics of Composition Fluctuations in Diblock Copolymer Solutions Far from and Near to the Ordering Transition (1994)
    s.l. : American Chemical Society
    Macromolecules 27 (1994), S. 4762-4773 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00095a017
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  • 2
    Electronic Resource
    Electronic Resource
    Effect if bucillamine on the rat trinitrobenzene sulfonic acid induced model of colitis (1996)
    Springer
    Inflammation research 45 (1996), S. 491-493 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311083
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  • 3
    Electronic Resource
    Electronic Resource
    Cardiac hypertrophy in surgically denervated dogs with aortic stenosis (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 73-75 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Left ventricular cell hypertrophy in dogs with aortic stenosis was accelerated by surgical denervation of the left ventricle. We conclude that there are neural mechanisms which, when present, inhibit cardiac cell hypertrophy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01959108
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  • 4
    Electronic Resource
    Electronic Resource
    Zooxanthellae release glucose in the tissue of a giant clam, Tridacna crocea (1999)
    Springer
    Marine biology 133 (1999), S. 665-673 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The giant clam Tridacna crocea harbors in the mantle tissue symbiotic microalgae commonly called zooxanthellae. Isolated zooxanthellae release glycerol into the medium in the presence of mantle tissue homogenate (MH), but it is not clear whether the cells do so in situ. In order to determine the photosynthetic products released by zooxanthellae in the mantle of the giant clam we traced photosynthetic fixation products from 13C- and 14C-bicarbonate both in the clam and in isolated zooxanthellae (IZ) in the presence or absence of MH. After 15 min incubation in the absence of MH the IZ released less than 0.6% of the fixed labeled carbon, mainly as glucose. The major intracellular photosynthates were neutral lipids, which constituted 20 to 40% of the total extractable 14C. In the presence of MH, the IZ released up to 5.6% of the total fixed 14C, mostly as glycerol, and the major intracellular photosynthate was glucose. In an intact clam incubated in sea water containing 14C-bicarbonate, 46 to 80% of the fixed 14C was translocated from the zooxanthellae to the host tissues. Most of the 14C in the hemolymph, in the isolated zooxanthellae and in intact mantle tissue (containing zooxanthellae) was recovered as glucose. No 14C-glycerol was detected in the mantle after 1 to 30 min incubation, and, even after 60 min, far less 14C-glycerol was synthesized than by IZ in the presence of MH. The possibility that in clam tissue glycerol is converted to glucose was examined by tracing the labeled carbon from 14C-glycerol injected into the adductor muscle. After 5 min incubation, no labeled glucose was found in the hemolymph, but after 60 min, some 20% was found as glucose. Thin slices containing zooxanthellae, cut from the surface of the mantle, fixed inorganic carbon supplied as NaH14CO3 in the medium and mainly released 14C-glucose. The addition of MH to the surrounding medium did not affect the release rate or form of release product. When the slices were cut into smaller pieces, however, the ratio of glycerol to glucose in the release product increased. These results indicate that in the presence of MH the metabolism of isolated zooxan- thellae was different from that of zooxanthellae in the mantle. In the presence of MH, isolated zooxanthellae release mostly glycerol, whereas in the mantle they release glucose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050507
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  • 5
    Electronic Resource
    Electronic Resource
    Methane production in a flooded soil in response to elevated atmospheric carbon dioxide concentrations (1999)
    Springer
    Biology and fertility of soils 29 (1999), S. 218-220 
    Details
    ISSN: 1432-0789
    Keywords: Key words Elevated atmospheric carbon dioxide ; Flooded soil ; Methane production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  CH4 production in a flooded soil as affected by elevated atmospheric CO2 was quantified in a laboratory incubation study. CH4 production in the flooded soil increased by 19.6%, 28.2%, and 33.4% after a 2-week incubation and by 38.2%, 62.4%, and 43.0% after a 3-week incubation under atmospheres of 498, 820, and 1050 μl l–1 CO2, respectively, over that in soil under the ambient CO2 concentration. CH4 production in slurry under 690, 920, and 1150 μl l–1 CO2 increased by 2.7%, 5.5%, and 5.0%, respectively, after a 3-day incubation, and by 6.7%, 12.8%, and 5.4%, respectively, after a 6-day incubation over that in slurry under the ambient CO2 concentration. The increase in CH4 production in the soil slurry under elevated CO2 concentrations in a N2 atmosphere was more pronounced than that under elevated CO2 concentrations in air. These data suggested that elevated atmospheric CO2 concentrations could promote methanogenic activity in flooded soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050547
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  • 6
    Electronic Resource
    Electronic Resource
    Identification and quantification of auxins in culture media of Azospirillum and Klebsiella and their effect on rice roots (1999)
    Springer
    Biology and fertility of soils 28 (1999), S. 377-381 
    Details
    ISSN: 1432-0789
    Keywords: Key words Auxins ; Plant growth-promoting rhizobacteria ; Rice root development ; Root outgrowths
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The production of auxins [indoleacetic acid (IAA) and related compounds] by Azospirillum brasilense and Klebsiella pneumoniae in culture media supplemented with tryptophan was investigated. Extracts from the supernatants of cultures incubated for different periods of time were partitioned into two fractions and each fraction was analysed separately by using HPLC. The chromatography was performed by using different optimized mobile phases and corresponding standards. Both N-fixing strains produced high quantities of extracellular IAA and tryptophol. The production of both compounds increased during the stationary phase of the culture. However, very low levels of indoleacetaldehyde and indolepyruvate produced by K. pneumoniae in the exponential phase of the culture, were only recorded when the samples were analysed immediately after the extraction. In addition, the effect of different concentrations of filter-sterilized culture supernatants of both strains on the development of rice roots grown in hydroponic culture medium was studied. Addition of the optimum concentrations (6–8%) of bacterial supernatants to such hydroponic cultures increased root elongation, root surface area, root dry matter and development of lateral roots and root hairs compared to untreated roots. On the other hand, the addition of high concentrations of the supernatant (more than 10%) strongly inhibited root elongation, lateral root development, and caused root outgrowths, i.e. round nodule-like tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050507
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  • 7
    Electronic Resource
    Electronic Resource
    Isolation and selection of indigenous Azospirillum spp. from a subtropical island, and effect of inoculation on growth of lowland rice under several levels of N application (1999)
    Springer
    Biology and fertility of soils 28 (1999), S. 129-135 
    Details
    ISSN: 1432-0789
    Keywords: Key words Azospirillum ; Indigenous isolates ; Nitrogen fertilization ; Nitrogen-phosphorus-potassium uptake ; Lowland rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Thirty-five Azospirillum strains (13 strains from plant roots and 22 strains from soils) were isolated from Ishigaki island, Japan, which has a subtropical climate. These strains were different from each other according to polymerase-chain-reaction band patterns obtained by using a random primer (OPT-08). Two Azospirillum strains (AZ43 and AZ92-2) were also examined for use in further experiments. Inoculation of lowland rice with these strains enhanced early growth of rice to various degrees. Inoculation of strains VIII.P1-2, AZ92-2, V.S2-2, and V.P5 in sterilized soil yielded higher shoot dry weights than the application of 90 μg N g–1 soil without inoculation. Only inoculation with strains AZ92-2 and VIII.P1-2 caused higher N uptake than the application of 90 μg N g–1 soil. Three strains were selected for the next experiment based on the results of their effect on the early growth of rice. An investigation was conducted to determine the ability of two indigenous Azospirillum strains (V.S2-2 and VIII.P1-2) and one stock strain (AZ92-2) to promote growth and nutrient-uptake of lowland rice in unsterilized soil under several levels of N application (0, 80, 160, and 240 mg N pot–1). Inoculation with these strains without N application increased shoot dry weight by 12–15% compared to the uninoculated treatment. Inoculation with Azospirillum V.S2-2 together with the application of 160 mg N pot–1 resulted in a shoot dry weight as high as that obtained in the treatment with 240 mg N pot–1 without inoculation. Thus, in this former case, the amount of N applied could be reduced by 80 mg pot–1 due to the effect of the microbial inoculum without a significant change in the high, targeted, yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050473
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  • 8
    Electronic Resource
    Electronic Resource
    Adenylate cyclase system of human trichilemmoma cell line (1987)
    Springer
    Archives of dermatological research 279 (1987), S. 530-535 
    Details
    ISSN: 1432-069X
    Keywords: Adenylate cyclase ; Cell culture ; Trichilemmoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The adenylate cyclase system of an established human trichilemmoma cell line was investigated. Stimulators of human epidermal adenylate cyclase system, epinephrine, histamine, adenosine, and prostaglandin E increased cyclic AMP levels of the trichilemmoma cells. The effects of epinephrine, histamine, and adenosine were inhibited by the addition of propranolol (a beta-adrenergic antagonist), cimetidine (histamine H2-antagonist), and theophylline (adenosinereceptor antagonist), respectively. The epinephrine, histamine, and protaglandin E effects were augmented by the addition of cyclic AMP (cAMP) phosphodiesterase inhibitor, isobutylmethylxanthine (IBMX); the adenosine effect was augmented by another phosphodiesterase inhibitor, papaverine. Without the addition of these phosphodiesterase inhibitors, the maximal accumulations were observed at 3 min incubation. Following this, the cAMP content returned to the basal level, and the cells did not respond to repeated stimulations with the same initial stimulator. This fact indicates receptor-specific refractoriness. For example, epinephrine-pretreated cells did not respond to epinephrine, but retained their sensitivity to histamine. It has been known that normal epidermal keratinocytes are regulated in vitro by glucocorticoids, colchicine, and retinoids, resulting in the augmentation of their beta-adrenergic response. Only hydrocortisone treatment on the trichilemmoma cells resulted in the augmentation of the beta-adrenergic response. Although the established human trichilemmoma cell line has similar adenylate cyclase systems as normal epidermis, it apparently has lost some of the regulatory mechanism of the beta-adrenergic response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413285
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  • 9
    Electronic Resource
    Electronic Resource
    The Treatment of dural AVM by embolization with aron alpha (Ethyl-2-cyanoacrylate) (1987)
    Springer
    Acta neurochirurgica 88 (1987), S. 10-19 
    Details
    ISSN: 0942-0940
    Keywords: Dural AVM ; embolization ; aron alpha ; cyanoacrylate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors report four cases of dural arteriovenous malformation (AVM) treated by a modified technique of embolization. Three cases had posterior fossa dural AVM and one had bilateral supratentorial dural AVM. The authors think that the best way to treat dural AVM is to close its nidus completely. This could be achieved by a safe and easy technique of embolization. The material used for embolization should intimately adhere to the vascular network and should not become fragmented. We used aron alpha (Ethyl-2-cyanoacrylate). This is a biological glue and it sets in a solid membranous form instantaneously on coming into the contact with an ionic medium. It does not get fragmented. Aron alpha was injected into the nidus of the AVM through a cannula inserted only into the main feeding artery in four cases of dural AVM reported here. Postoperative angiography showed complete obliteration of the AVM's, they did not fill either from the treated artery or from the untreated feeding arteries. The technique is easy and safe. There was no operative or postoperative complication. All the patients have remained asymptomatic to date,i.e. 2, 2, 6 and 7 1/2 years after the procedure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400509
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  • 10
    Electronic Resource
    Electronic Resource
    Prospection of chronic vasospasm by CT findings (1982)
    Springer
    Acta neurochirurgica 63 (1982), S. 23-30 
    Details
    ISSN: 0942-0940
    Keywords: Chronic vasospasm ; haematoma in the basal cistern ; CT ; subarachnoid haemorrhage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Haematoma in the basal cistern was classified into five grades. A little or moderate haematoma (1 + or 2 +) disappeared from the basal cistern in 3 or 4 days, however much or severe haematoma (3 + or 4 +) remained over a week. Vasospasm occurred in a high number of the cases in which the haematoma was recognized in the basal cistern later than 4 days after SAH not only in operative case but also in conservative case. However vasospasm occurred rarely in cases with early operation within 24 hours after onset except for cases with severe packed haematoma (4+) in the basal cistern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01728851
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