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  • 1
    Electronic Resource
    Electronic Resource
    Cytotoxic alkaloids of Annona montana
    Amsterdam : Elsevier
    Phytochemistry 33 (1993), S. 497-500 
    Details
    ISSN: 0031-9422
    Keywords: Annona montana ; Annonaceae ; alkaloids ; annolatine ; annoretine ; cytotoxicity.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(93)85547-5
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cytotoxic aporphinoid alkaloids from thalictrum sessile
    Amsterdam : Elsevier
    Phytochemistry 27 (1988), S. 1563-1564 
    Details
    ISSN: 0031-9422
    Keywords: (+)-thalifarazine. ; Ranunculaceae ; Thalictrum sessile ; alkaloids ; liriodenine
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(88)80247-4
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Alkaloids of formosan Fissistigma and Goniothalamus species
    Amsterdam : Elsevier
    Phytochemistry 24 (1985), S. 1829-1834 
    Details
    ISSN: 0031-9422
    Keywords: Annonaceae ; F. oldhamii ; Fissistigma glaucescens ; Goniothalamus amuyon ; N-methylatherosperminium. ; alkaloids ; quaternary phenanthrene alkaloid
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)82561-3
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Review of electrolytic conductance standards (1987)
    Springer
    Journal of solution chemistry 16 (1987), S. 985-997 
    Details
    ISSN: 1572-8927
    Keywords: Aqueous solution ; cell constant ; conductance ; electrolytic conductivity ; potassium chloride ; primary ; resistance ; resistivity, secondary, standards, and temperature scale
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Measurements of aqueous electrolytic conductance are performed routinely in a variety of disciplines and industries. Conductivity is a measure of the ionic content in solution and thus has applications in pharmaceuticals, power plants, rainwater, lake surveys, and oceanography, to name a few. A thorough review of the measurement of and standards for aqueous electrolytic conductance is herein presented. At present, the most precise and accurate standards have been set forth by the International Organization of Legal Metrology (OIML), and have been adopted by most other standards organizations. However, the uncertainty assigned to these standards, especially the secondary standards, is somewhat larger than would be expected from the physical aspects of the measurement. Several changes in the units and measurement scales, including temperature, volume, molar mass, resistance, and concentration obfuscate the accuracy of these standards. In addition to the review, research is proposed, using a conductance cell with variable length, to establish new standards for aqueous electrolytic conductance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652583
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of the absolute specific conductance of primary standard KCl solutions (1989)
    Springer
    Journal of solution chemistry 18 (1989), S. 515-528 
    Details
    ISSN: 1572-8927
    Keywords: Absolute standard ; conductivity cell ; demal ; electrolyte ; molality ; potassium chloride ; primary standard ; specific conductance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A determination of the absolute specific conductance of KCl solutions is demonstrated. The measurement is based on the conductance cell with a well defined geometry, having a difference in the removable center tube of accurately measured dimensions. The specific conductance of the solution is obtained from the measured resistances of the cell with and without the center tube and the measured l/A ratio of the center tube. Specific conductances obtained using the cell agree with the previously accepted standards for 0.1 demal and 0.01 demal solutions within 0.02%. Results are also presented for solutions based on molality. The temperature control, bridge, and detector technology used to obtain results of this accuracy are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664234
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  • 6
    Electronic Resource
    Electronic Resource
    Absolute determination of electrolytic conductivity for primary standard KCl solutions from 0 to 50°C (1991)
    Springer
    Journal of solution chemistry 20 (1991), S. 391-401 
    Details
    ISSN: 1572-8927
    Keywords: Cell constant ; conductance ; demal ; electrolytic conductivity ; potassium chloride ; primary standards ; resistance ; specific conductance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An absolute determination of aqueous electrolytic conductivity has been made for primary standards 0.01D and 0.1D (demal) potassium chloride solutions over the temperature range of 0 to 50°C in 5 degree intervals. A cell with a removable center section of accurately known length and area was used for the measurements. Values were adjusted to be in conformity with the ITS-90 temperature scale. The overall uncertainty over the entire temperature range is estimated to be 0.03%. Values at 25°C for 0.01D and 0.1D KCl solutions are 0.0014086 and 0.012852 S-cm−1, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650765
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Arterial patterns in the thoracic and abdominal segments of the esophagus: anatomy and clinical significance (1999)
    Springer
    Surgical and radiologic anatomy 20 (1999), S. 399-402 
    Details
    ISSN: 1279-8517
    Keywords: Esophageal artery ; Esophageal anatomy ; Semicircular esophageal artery ; Cadaver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cadaver studies were made to obtain more details about the arterial patterns in the thoracic and abdominal segments of the esophagus, with emphasis on the arterial supply to the lower esophageal sphincter (LES). The results showed that the inferior thoracic segment of the esophagus usually received blood supply from a single artery, with an average diameter of 1.42 ± 0.49 mm (X ± s), whereas the abdominal segment was commonly supplied by two arteries. The abdominal esophageal arteries coming from the left gastric artery were semi-circular in shape with an average diameter of 2.06 ± 0.70 mm. From these semi-circular esophageal arteries, 3 to 8 smaller arteries branched off and penetrated into the muscle of the abdominal segment of the esophagus or anastomosed with arterial branches from the inferior thoracic segment. Thus, the blood supply of the abdominal segment was richer than that of the inferior thoracic segment. This richness of blood supply, characterized by semicircular esophageal arteries in the abdominal segment, may be important for the function of the LES.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00276-998-0399-1
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Arterial patterns in the thoracic and abdominal segments of the esophagus: anatomy and clinical significance (1998)
    Springer
    Surgical and radiologic anatomy 20 (1998), S. 399-402 
    Details
    ISSN: 1279-8517
    Keywords: Esophageal artery ; Esophageal anatomy ; Semicircular esophageal artery ; Cadaver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une étude autospique a été réalisée pour obtenir plus de détails sur le trajet de l'artère du segment thoracoabdominal de l'œsophage en insistant sur l'apport artériel du sphincter inférieur de l'œsophage (SIO). Les résultats montrent que le segment thoracique inférieur de l'œsophage reçoit habituellement son apport artériel d'une seule artère d'un diamètre moyen de 1.42±0.49 mm. Tandis que le segment abdominal de l'œsophage est le plus fréquemment vascularisé par deux artères. Les artères de l'œsophage abdominal naissant de l'artère gastrique gauche adoptent une forme semi-circulaire et présentent un diamètre moyen de 2.06±0.70 mm. De ces artères œsophagiennes semi-circulaires naissent trois à huit petites branches artérielles qui pénètrent dans le muscle du segment abominal de l'œsophage ou s'anastomosent avec les branches artérielles venant du segment thoracique inférieur de l'œsophage. Ainsi, la vascularisation du segment abdominal de l'œsophage est plus riche que celle du segment thoracique inférieur. La richesse de la vascularisation caractérisée par les artères œsophagiennes semi-circulaires au niveau du segment semi-abdominal peut être importante dans la fonction du SIO.
    Notes: Summary Cadaver studies were made to obtain more details about the arterial patterns in the thoracic and abdominal segments of the esophagus, with emphasis on the arterial supply to the lower esophageal sphincter (LES). The results showed that the inferior thoracic segment of the esophagus usually received blood supply from a single artery, with an average diameter of 1.42±0.49 mm (X±s), whereas the abdominal segment was commonly supplied by two arteries. The abdominal esophageal arteries coming from the left gastric artery were semi-circular in shape with an average diameter of 2.06±0.70 mm. From these semi-circular esophageal arteries, 3 to 8 smaller arteries branched off and penetrated into the muscle of the abdominal segment of the esophagus or anastomosed with arterial branches from the inferior thoracic segment. Thus, the blood supply of the abdominal segment was richer than that of the inferior thoracic segment. This richness of blood supply, characterized by semicircular esophageal arteries in the abdominal segment, may be important for the function of the LES.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01653129
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    Paper (German National Licenses)
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