Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 31P-NMR  (1)
  • Cell volume  (1)
  • Chemistry  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 142 (1985), S. 81-86 
    ISSN: 1432-072X
    Keywords: Carbon-fixation ; Cell volume ; Dinophyceae ; Growth rate ; Irradiance ; Macromolecular composition ; Nucleic acid composition ; Amphidinium carteri
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of irradiance on the growth rate, macromolecular composition and photosynthetic carbon metabolism of Amphidinium carteri was studied in batch culture. Growth rate increased linearly with increasing irradiance up to a maximum growth rate of 0.04 h-1 at an irradiance of 80 μEm-2s-1. In contrast to a number of other studies on both prokaryotic and eukaryotic microorganisms, ours showed that cellular content of RNA, DNA, protein and carbohydrate of A. carteri were invariant with growth rate over the range μ=0.04 to 0.007 h-1. The invariant macromolecular composition was correlated with a constant modal cell volume. Chlorophyll and lipid per cell increased with decreasing irradiance. The distribution of [14C]-bicarbonate in the major end products of photosynthesis after incubation with isotope for 14% of a doubling time showed that the percentage carbon in the chloroform (lipids and pigments) fraction increased with decreasing irradiance while that of the trichloroacetic acid soluble (carbohydrate) fractions decreased. The percentage of isotope in the trichloroacetic acid insoluble (protein) fraction and methanol: water fraction (metabolites) remained constant. Because this species, under light-limited growth, differs from other organisms so far studied, more species must be similarly examined before nucleic acid content is used as an index growth rate in the field.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 614 (1992), S. 131-141 
    ISSN: 0044-2313
    Keywords: Rhenium complexes ; oxygen ligands ; tripod ligands ; 31P-NMR ; radionuclides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Rhenium Complexes Stabilized by Tris-chelating Oxygen Ligands: Potential New Radiopharmaca?Ris-chelating oxygen ligands of the general formula L- = [(C5H4R)Co{P(O)R′R″}3]- (R = COOCH3, COOH and R′ = OCH3; R = H and R′ = O(CH2)5COOCH3, O(CH2)5COOH; R″ = OCH3) have been synthesized. These ligands L- and others of the same type have been used to prepare the rhenium oxo complexes [LReO3] and [LReOX2] (X = Cl, Br, I). In order to judge their use in radioimmunotherapy the corresponding complexes containing radioactive rhenium isotopes have also been synthesized. The rhenium(VII) as well as the diamagnetic rhenium(V) complexes are stable in air in the solid state as well as in organic solvents. They hydrolyze slowly in water to yield perrhenic acid. The X-ray structures of the sodium salt Na[(C5H4COOCH3)Co{P(O)(OCH3)2}3] and of the rhenium complex [LReOBr2] (R = H, R′ = R″ = OCH3) have been determined. The sodium salt crystallizes in trimeric units with the composition [(NaL)3 · 3 H2O]. Each sodium has a distorted octahedral oxygen coordination. In [LReOBr2] the ReO4Br2 octahedron is only slightly distorted.
    Notes: Vier neue Sauerstoffchelatliganden L- der allgemeinen Formel [(C5H4R)Co{P(O)R′R″}3]- (R = COOCH3, COOH und R′ = OCH3; R = H und R′ = O(CH2)5COOCH3, O(CH2)5COOH; R″ = OCH3) wurden synthetisiert. Diese neuen Liganden L- und andere Liganden des gleichen Typs wurden für die Darstellung von Rhenium(VII)-Komplexen [LReO3] und Rhenium(V)-Komplexen [LReOX2] (X = Cl, Br, I) eingesetzt. Im Hinblick auf deren mögliche Verwendbarkeit in der Radioimmunotherapie wurden die Synthesen auch auf radioaktive Rheniumisotope übertragen. Sowohl die Rhenium(VII)- als auch die diamagnetischen Rhenium(V)-Komplexe sind in fester Form und in organischen Lösungsmitteln an Luft beständig; sie zersetzen sich in Wasser langsam unter Bildung von Perrheniumsäure. Das Natriumsalz Na[(C5H4COOCH3)Co{P(O)(OCH3)2}3] kristallisiert als dreikernige Einheit der Zusammensetzung [(NaL)3 · 3 H2O]. Jedes Natrium ist verzerrt oktaedrisch von Sauerstoff umgeben. Die Kristallstrukturbestimmung der Verbindung [LReOBr2] (R = H, R′ = R″ = OCH3) zeigt die erwartete schwach verzerrte oktaedrische Koordination des Rheniums.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...