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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 2220-2222 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Laser ionization time-of-flight mass spectrometry has been used to probe Nd:YAG laser ablation products from a new graphite-like material of (BC2N)n composition. Neutral species mainly composed of one, two, and three atoms were detected. A center-of-mass velocity of 1.2×105 cm/s was obtained for the expansion of the products. An influence of collision-induced reactions is suggested for the product generation. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 141 (1999), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-5233
    Keywords: Fructose 3-phosphate ; Sorbitol ; Erythrocyte ; Glycosylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To investigate the effect of fructose ingestion on sorbitol and fructose 3-phosphate (F3P) in erythrocytes, we administered 50 g fructose with and without treatment with an aldose reductase inhibitor, epalrestat, to seven healthy, normal-glucose-tolerant, male volunteers aged 20–43 years. The same subjects were given 50 g glucose on another day. The sorbitol and F3P contents in their erythrocytes increased significantly, reaching peak levels at 60 min and 180 min, respectively, following fructose ingestion. On the other hand, glucose ingestion did not cause any statistically significant change in sorbitol content in their erythrocytes, although it significantly elevated their F3P content. Treatment with epalrestat had no significant effect on incremental changes in erythrocyte sorbitol and F3P content following fructose ingestion. This suggests that oral fructose may be converted directly to sorbitol and F3P in erythrocytes instead of being converted via glucose. Thus, the dietary intake of fructose may affect the concentrations of sorbitol and F3P in erythrocytes in normal men.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-5233
    Keywords: Key words  Fructose 3-phosphate ; Sorbitol ; Erythrocyte ; Glycosylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract   To investigate the effect of fructose ingestion on sorbitol and fructose 3-phosphate (F3P) in erythrocytes, we administered 50 g fructose with and without treatment with an aldose reductase inhibitor, epalrestat, to seven healthy, normal-glucose-tolerant, male volunteers aged 20–43 years. The same subjects were given 50 g glucose on another day. The sorbitol and F3P contents in their erythrocytes increased significantly, reaching peak levels at 60 min and 180 min, respectively, following fructose ingestion. On the other hand, glucose ingestion did not cause any statistically significant change in sorbitol content in their erythrocytes, although it significantly elevated their F3P content. Treatment with epalrestat had no significant effect on incremental changes in erythrocyte sorbitol and F3P content following fructose ingestion. This suggests that oral fructose may be converted directly to sorbitol and F3P in erythrocytes instead of being converted via glucose. Thus, the dietary intake of fructose may affect the concentrations of sorbitol and F3P in erythrocytes in normal men.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0942-0940
    Keywords: Keywords: Choroid plexus carcinoma; infant; surgery; chemotherapy; radiotherapy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  Choroid plexus carcinoma (CPC) is a rare malignant brain tumour which occurs predominantly in childhood. We present the cases of two infants with CPC. One, a 6-month-old boy with the tumour in the right lateral ventricle, who died of a postoperative intracranial haemorrhage and severe gastrointestinal bleeding, and the other, a 9-month-old boy with the tumour in the fourth ventricle, who has been well without recurrence for 12 months after total removal in combination with chemotherapy using cisplatin and VP-16 and local radiotherapy. In the 54 CPC cases in children under 2 years of age including our 2 cases in which the clinical results were described in the literature since 1983, tumour location (lateral ventricle, p=0.0225), surgery (gross total resection, p=0.0447), and chemotherapy (yes, p=0.0010) were revealed to be significant positive prognostic factors by the univariate analysis using the log rank test, and surgery (gross total removal, p=0.0259) and chemotherapy (yes, p=0.0016) were independent, significant positive prognostic factors in the multivariate analysis using the Cox proportional hazard regression model. Although there is a risk in doing a statistical analysis of other people's reports, these results suggest that, at present, the gross total removal of the tumour with intensive chemotherapy is the best choice of initial treatment for young children with CPC, and that radiotherapy should be considered for patients after 24 months of age and/or should be performed locally.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 106 (1997), S. 180-182 
    ISSN: 1435-1536
    Keywords: Rheology ; suspension ; adsorption ; polystyrene ; depletion flocculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Storage moduli (G′) of hydrophilic and hydrophobic silica suspensions in trans-decalin and in trans-decalin solutions of polystyrene (PS) have been measured by taking account of PS adsorption. PS were adsorbed on the hydrophilic silica. TheG′ values of the hydrophilic suspensions in the presence of low molecular weight PS are similar to those without PS and they are larger than those in the presence of higher molecular weight PS. On the other hand, any PS chains cannot adsorb on the hydrophobic silica particles. TheG′ values of all hydrophobic suspensions are higher than that in trans-decalin due to depletion flocculation and they are two orders of magnitude larger than those for the hydrophilic silica suspensions.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Positive temperature coefficient of resistivity (PTCR) ceramics with low resistivities at room temperature were obtained by using oxalate-derived barium titanate powders. The average room-temperature resistivity of the PTCR ceramics was 4Ω cm, and the magnitude of their PTCR jump was around four orders with a voltage proof of more than 50 Vmm−1. These PTCR properties are significantly influenced by the calcination temperature of the starting materials and by the resultant properties of the ceramic bodies. The microstructure of such-PTCR ceramics with a low room-temperature resistivity produced in this study was found to be rather heterogeneous. Complex impedance measurements revealed that the resistivity of the present PTCR materials was determined predominantly by the grain-boundary resistance even at room temperature.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 19 (1975), S. 2515-2527 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: To elucidate the water transport mechanism through homogeneous membranes, water and water vapor permeation through crosslinked cellulose membranes, cellulose diacetate, and cellulose triacetate membranes are studied. It is found that the water flux increases with the degree of hydration; and as for cellulose membranes, the degree of hydration is an increasing function of the degree of crosslinking. Activation energy of hydraulic permeability (Kw) is not equal to that of purely viscous flow, and is smaller than that of the water vapor diffusion coefficient (D̄) for all membranes. The free-volume concept relating the molar frictional coefficient to temperature and to degree of hydration explains reasonably the temperature dependence of hydraulic permeability and of water vapor diffusion coefficient and gives adequate values for the fractional free volume of the system. The critical volume V*, appearing in the Cohen-Turnbull expression between friction coefficient and free volume fraction, may be considered as the size of the cluster of water molecules. The value of V* in the case of hydraulic permeability is larger than that for water vapor diffusion by several times. Furthermore, the value V* increases with increase of degree of hydration for water permeation and water vapor diffusion.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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