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  • Urinary tract repair  (5)
  • Analytical Chemistry and Spectroscopy  (3)
  • Cadmium  (3)
  • 1
    Digitale Medien
    Digitale Medien
    The use of a biodegradable collagen/vicryl composite membrane to repair partial nephrectomy in rabbits (1987)
    Springer
    Urological research 15 (1987), S. 239-242 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Collagen vicryl composite ; Partial nephrectomy ; Urinary tract repair ; Rabbit
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary A composite membrane produced from collagen and vicryl mesh has been used to cover the kidney surface following partial nephrectomy in rabbits. The membrane readily held sutures, gave satisfactory haemostasis, and prevented leakage of urine. The experiments showed that the prosthesis biodegraded in less than twenty weeks. The only observed long-term effect of the material was thickening of the renal capsule. The results indicate that this membrane may be a suitable reparative materal for use in traumatised kidneys in humans.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00262107
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  • 2
    Digitale Medien
    Digitale Medien
    An assessment of a collagen/vicryl composite membrane to repair defects of the urinary bladder in rabbits (1987)
    Springer
    Urological research 15 (1987), S. 235-238 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Bladder ; Urinary tract repair ; Collagen/vicryl
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Collagen/vicryl (Polyglactin) composite membrane has been used to repair full-thickness defects in the urinary bladder of rabbits. The material has been shown to be biodegradable, prevent leakage of urine, and is readily replaced by collagenous scar tissue lined with a urothelium. Regeneration of smooth nuscle has been observed in the repair area of some animals. The results suggest that such a material may well be of use to urologists wishing to augment contracted bladders or in the repair of bladder fistulae in human subjects, thereby avoiding the use of bowel or other material e.g. omentum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00262106
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  • 3
    Digitale Medien
    Digitale Medien
    Renal cadmium content in the West of Scotland (1983)
    Springer
    Urological research 11 (1983), S. 285-290 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Trace metals ; Cadmium ; Kidney cortex ; Ischaemic heart disease ; Medulla
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The trace element content of kidneys has been documented in very few international centres. Significant differences can be demonstrated between the cortical and medullary levels of calcium, zinc and cadmium. For the West of Scotland the values for the latter are similar to those found in Scandinavia. There are significantly higher cadmium contents in subjects who smoke and who have evidence of ischaemic heart disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00256348
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  • 4
    Digitale Medien
    Digitale Medien
    The in vitro assessment of a collagen/vicryl (polyglactin) composite film together with candidate suture materials for use in urinary tract surgery (1987)
    Springer
    Urological research 15 (1987), S. 53-59 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Collagen vicryl composite ; Urinary tract repair ; Sutures
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary A Vicryl (Polyglactin)/Collagen composite membrane has been developed for potential use in urinary tract surgery. The compatability of this membrane, together with its two individual components, collagen film and vicryl mesh, has been tested over a three week period in urine obtained from both healthy and from stone forming patients. The rate of degradation as indicated by changes in the mechanical strength was determined at regular intervals. In addition,absorbable suture materials such as plain catgut, chromic catgut, and vicryl were similarly tested; in the latter case, the breaking stress, and actual loss of weight of the material were compared. The whole series of experiments were then repeated in urine obtained from rabbits, the animal chosen for any future in vivo studies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00256337
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  • 5
    Digitale Medien
    Digitale Medien
    The effects of treatment on the hypercalciuria of chronic cadmium poisoning (1979)
    Springer
    Urological research 7 (1979), S. 285-289 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Cadmium ; Iron ; Bendrofluazide ; Hypercalciuria Hyperzincuria ; Treatment
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Cadmium induces a variety of effects on kidney tubules including hypercalciuria. This is accompanied by hyperzincuria. The present work shows that both of these biochemical abnormalities can be corrected but where a state of cadmium-induced-anaemia exists urine zinc and calcium excretion do not follow the expected parallel course in response to iron therapy as they do with bendrofluazide.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00256610
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  • 6
    Digitale Medien
    Digitale Medien
    Histological and ultrastructural changes in rat kidney following cadmium injection (1977)
    Springer
    Urological research 5 (1977), S. 15-20 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Cadmium ; Kidney ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Cadmium injection in rats affects the genito-urinary system. The renal effects are generally considered to be mainly tubular. Light microscopy of 29 specimens confirms cellular damage in the glomeruli with changes in glomerular capillaries. Electron microscopic changes in the glomeruli confirm changes in the podocytes, thickening of the basement lamina, the occurrence of electron dense deposits in association with the capillary endothelium with platelet and polymorphonuclear cell accumulations which suggests opening of the endothelial junction of the glomerular vessels.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00257111
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  • 7
    Digitale Medien
    Digitale Medien
    The in-vitro assessment of a collagen/vicryl (polyglactin) composite film together with candidate suture materials for use in urinary tract surgery (1988)
    Springer
    Urological research 16 (1988), S. 111-117 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Collage vicryl composite ; Urinary tract repair ; Urinary calculi
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Collagen coated vicryl mesh has been incubated with a series of urine collections from healthy and stoneforming patients. For comparison, collagen film, vicryl mesh, and a number of absorbable and non-absorbable sutures were similarly tested. Incubation in rabbit urine were also included in the study. Deposition of urinary salts, estimated qualitatively by electron microcopy, were observed on the collagen vicryl composite in approximately two thirds of the urines tested including rabbit urine. Those urines from patients with a high calcium excretion in particular caused urinary deposits on the material. Similar results were obtained with collagen film although the latter was not tested in rabbit urine. Considerably less deposits of urinary constituents were found with other absorbable materials such as vicryl mesh, vicryl sutures, and chromic catgut, whereas a higher proportion of concretions were found with the nonabsorbable sutures. The results indicate that urinary salt deposition may be a problem associated with collagen based composite materials after prolonged exposure to urine. It must, however, be emphasised that great care should be exercised when extrapolating any results obtained in-vitro to the in-vivo situation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00261967
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  • 8
    Digitale Medien
    Digitale Medien
    The in-vitro assessment of a Collagen/Vicryl (Polyglactin) composite film together with candidate suture materials for potential use in urinary tract surgery (1988)
    Springer
    Urological research 16 (1988), S. 381-384 
    Details
    ISSN: 1434-0879
    Schlagwort(e): Collagen Vicryl composite ; Urinary tract repair ; Urinary tract infection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary A Collagen/Vicryl (Polyglactin) composite membrane (developed for use in urinary tract surgery) has been incubated in cultures of radioactively labelled urinary tract pathogens vis Escherichia coli, Staphylococcus epidermidis, and Proteus mirabilis for up to 1h. For comparison, collagen film, Vicryl mesh, and a number of absorbable and nonabsorbable sutures were similarly tested. Following incubation, samples were also examined by scanning electron microscopy. Under the experimental conditions employed, only minimal adherence of the micro-organisms to the collagen coated Vicryl mesh, its two individual components, as well as Vicryl and nylon sutures was observed. Significantly greater numbers of bacteria, however, ahered to silk and Chromic Catgut. The results suggest that adherence of microorganisms to the prosthesis even in infected urine is unlikely to develop into a microcolony of bacteria. However, it should be emphasised that great care must be excercised when extrapolating from the in-vitro to the in-vivo situation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00256047
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  • 9
    Digitale Medien
    Digitale Medien
    Optimization of capillary parameters for gas chromatography (1984)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 382-388 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Gas chromatography ; Capillary columns ; HETP equation ; Optimum column parameters ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: An HETP equation for the capillary column is developed that takes into account the dependence of gaseous diffusion on pressure, the compressibility of the mobile phase, together with the unique relationship between mobile phase velocity, and the resistance to mass transfer in the stationary phase. The equation is used to develop a procedure for column optimization and expressions are derived that allow the optimum column radius and optimum column length to be calculated for a given fixed inlet pressure. It is shown that fast, simple separations are optimally achieved using relatively short small diameter columns. Conversely, optimum performance for the separation of complex mixtures requiring higher efficiencies requires the use of long columns with relatively large diameters.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240070708
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  • 10
    Digitale Medien
    Digitale Medien
    Retention tuning in the enantioseparation of naproxen esters and free acid (1997)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 20 (1997), S. 179-180 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Enantiomers ; Chiral stationary phase ; Whelk-O ; Coelution ; Peak overlap ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240200311
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