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  • 1
    Electronic Resource
    Electronic Resource
    Production of solid D2 threads for dense Z-pinch plasmas (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1885-1887 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A liquid-He/liquid-N2 cryostat system has been developed to freeze D2 gas and extrude fibers of solid deuterium into a vacuum chamber. Fibers that are 40 μm in diameter and 10 cm long have been successfully and routinely produced. The fibers are observed to remain constant in physical dimensions for several minutes. A fiber will be used as the electrical load for a pulsed power machine in a program investigating the properties of dense, ohmically heated plasmas for controlled thermonuclear fusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138438
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  • 2
    Electronic Resource
    Electronic Resource
    Germination of Cicer arietinum seeds and thiourea-induced phytotoxicity (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 57 (1983), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Thiourea, hydroxyurea, phenylthiourea, methylurea, methylthiourea, thiosemicarbazide and 2,2-dithiodipyridine affected the germination of Cicer arietinum L. cv. Castellana (chick-pea) seeds. Microscopic observations of the subapical zone of the radicle showed that thiourea induced an increase in cell volume and length when compared with control seeds germinated at 25° or 30°C in water. These results emphasize the importance of the processes controlling solute and water uptake during early germination of chick-pea seeds. In contrast to this stimulation of volume increase, the thiourea-treated seedlings were unable to synthesize chlorophyll when exposed to light. This toxic effect was reduced when thiourea was administered only during the first few hours of germination. Thiourea also caused an increase in the uptake of 3H-thymidine and 14C-leucine but it decreased their incorporation into DNA and protein, respectively. These results suggest a stimulation of plasmalemma exchange activities, but toxic or inhibitory effects on other metabolic processes necessary for normal development of seedlings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1983.tb00909.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of thiourea on the ionic content and dark fixation of CO2 in embryonic axes of Cicer arietinum seeds (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 57 (1983), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: During the first 12 h of germination of Cicer arietinum L. (cv. Castellans) seeds, K+ is first lost into the surrounding medium and is later reabsorbed. Thiourea accelerates this reabsorption. Since there is an increase in the mobilization of K+ in response to thiourea, a greater accumulation of malate due to the carboxylation of phosphoenolpyruvic acid takes place as compared with that occurring in water. The subapical zone of the radicle accumulates the greatest amounts of water, K+ and malate. The variation in the “in vitro” activity of phosphoenolpyruvate carboxylase does not explain the difference in malate in response to the different treatments, consequently there must be chemical changes in the cytoplasm which favour this carboxylation “in vivo”. These results show that thiourea accelerates the mobilization of K+ and stimulates the dark fixation of CO2 in embryonic axes of Cicer arietinum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1983.tb00910.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of nonanoic acid and other short chain fatty acids on exchange properties in embryonic axes of Cicer arietinum during germination (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 61 (1984), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Nonanoic acid, which inhibits germination in several seeds, enhanced ion efflux from embryonic axes of Cicer arietinum L., especially at temperatures above 25°C. Other short chain fatty acids had little effect on germination and ion leakage. Nonanoic acid also decreased uptake of 86Rb+ and 22Na+ and increased efflux of both isotopes from the embryonic axes into the incubation solution. Fusicoccin, which stimulates early germination in C. arietinum, counteracted the effects of nonanoic acid at both 25 and 30°C. These results suggest that nonanoic acid affects the integrity of plasmalemma and other membrane systems. Nonanoic acid thus inhibits cell elongation during early germination by disturbing ion exchange and inhibiting water uptake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1984.tb06345.x
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  • 5
    Electronic Resource
    Electronic Resource
    Aspergillosis of the sphenoid sinus simulating a pituitary tumor (1989)
    Springer
    Neuroradiology 31 (1989), S. 362-363 
    Details
    ISSN: 1432-1920
    Keywords: Aspergillosis ; Pituitary abscess ; Trans-sphenoidal surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sphenoidal aspergillosis is an unusual cause of sella turcica enlargement. Pituitary abscess secondary to Aspergillus had been reported. In the present case, a woman with sphenoid sinus aspergillosis mimicked a pituitary tumor. This patient survived her infection with intact pituitary function following a transsphenoidal approach. No postoperative amphotericine-B and 5-fluorocytosine were necessary. CT scan revealed a mass occupying the sphenoid sinus extending to the sella turcica. Factors that should alert the clinican to the presence of a sphenoidal and pituitary abscess in a patient with sella turcica enlargement are prior episodes of sinusitis, meningitis and immunosuppression and, as in the present case, hyperglycemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00344187
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  • 6
    Electronic Resource
    Electronic Resource
    Altered development of polysomal RNA activity in chick-pea (Cicer arietinum L.) embryonic axes. Effects of abscisic acid and temperature (1985)
    Springer
    Planta 164 (1985), S. 517-523 
    Details
    ISSN: 1432-2048
    Keywords: Abscisic acid and RNA translation ; Cicer ; Embryonic axis ; Germination and temperature (seeds) ; Poly (A)RNA ; Protein synthesis ; Temperature and RNA translation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The in vitro activity of polysomal polyadenylated RNA (poly(A)RNA) was studied using chick-pea (Cicer arietinum L.) embryonic axes subjected to treatments retarding germination (H2O 30°C and abscisic acid [ABA] 30°C) or inducing a false germination (thiourea 30°C) in which normal protein synthesis and growth did not occur. All treatments induced a smaller proportion of poly(A)RNA compared with the control (H2O 25°C). However, poly(A)RNA obtained in the presence of ABA had a similar in vitro activity to that of the control. The translation of mRNA from embryonic axes germinated at high temperatures was extensively blocked (70%) by methyl-7-guanosine-5′-triphosphate, whereas mRNA translation from axes treated with H2O-25°C and ABA was completely blocked (100%), indicating a greater cap dependence in the latter cases. Polyacrylamide gel electrophoresis showed that ABA and H2O-30°C each induced the synthesis of a polypeptide with an approximate Mr of 32 kDa, probably a germination regulator. It is suggested that ABA and high temperatures could regulate germination at the translational level as well as affecting ionic-exchange properties, as has been previously demonstrated (Hernández-Nistal et al. 1983, Physiol. Plant. 57, 273–278).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395969
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of abscisic and gibberellic acids on malate synthase transcripts in germinating castor bean seeds (1987)
    Springer
    Plant molecular biology 9 (1987), S. 227-235 
    Details
    ISSN: 1573-5028
    Keywords: malate synthase cDNA ; castor bean ; transcription ; gibberellic acid ; abscisic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Several clones complementary to malate synthase mRNA have been identified in a complementary-DNA library to mRNA from castor bean endosperm. One of these clones has been used as a probe to measure levels of transcripts during seed germination and the effects of gibberellic acid and abscisic acid on these levels have been examined. Malate synthase transcripts increased during germination and GA3 advanced their appearance in the endosperm. Exogenously applied ABA inhibited the accumulation of transcripts over a time course of germination but the addition of GA3 counteracted its inhibitory effects. The data confirmed previous reports which indicated that the action of both growth regulators was on transcript accumulation and that there is a coordinated induction of the enzymes involved in the lipid metabolism in oil seeds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00166459
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  • 8
    Electronic Resource
    Electronic Resource
    Patterns of apical structure in the genera Gelidium and Pterocladia (Gelidiaceae, Rhodophyta) (1987)
    Springer
    Hydrobiologia 151-152 (1987), S. 199-203 
    Details
    ISSN: 1573-5117
    Keywords: seaweed ; apical structure ; Gelidium ; Pterocladia ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00046128
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  • 9
    Electronic Resource
    Electronic Resource
    Chemotaxis in the elderly: Modifications after the intake of ascorbic acid and levamisole (1988)
    Springer
    Age 11 (1988), S. 88-92 
    Details
    ISSN: 1574-4647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The spontaneous motility and chemotaxis of PMNs have been investigated in 25 healthy subjects aged 69–88 years (79.04 ± 4.6) and compared with the values obtained in 25 subjects aged 17–35 years (25.6 ± 5.9). For spontaneous motility, the values were 32 ± 9 in the young subjects, in comparison with 24 ± 11 in the elderly (p 〈 0.05). For chemotaxis the values were 34 ± 14 in the young subjects and 25 ± 10 in the elderly (p 〈 0.02). A group of 8 elderly subjects received 2 g ascorbic acid daily for 1 month. Measurements of spontaneous motility and chemotaxis were conducted, and the results were compared with those obtained prior to the treatment. Neither parameter was significantly modified. Another group of 8 elderly subjects received 50 mg of levamisole daily for 3 days. This drug caused a significant increase in spontaneous motility (p 〈 0.0001) and chemotaxis (p 〈 0.05). In our experience, the elderly exhibit a decrease in spontaneous motility and chemotaxis of PMNs in comparison with those values obtained in young people. Although levamisole increased the values of both parameters, ascorbic acid did not.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02431745
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