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  • Chemistry  (46)
  • Phaeophyceae  (4)
  • crystal structure  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Sexual pheromones and gamete chemotaxis inAnalipus japonicus (Phaeophyceae) (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 534-536 
    Details
    ISSN: 1420-9071
    Keywords: Sexual pheromone ; chemotaxis ; Phaeophyceae ; Analipus ; ectocarpene ; hormosirene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Female gametes of the marine brown algaAnalipus japonicus secrete a complex bouquet of olefinic C11-hydrocarbons. The major compound is ectocarpene, while hormosirene and dictyotene are present at levels of 2%. Although a minor constituent of the pheromone bouquet, hormosirene is 100 times more active as a male-attractant than ectocarpene. Thus, sex attraction inAnalipus is mediated by two compounds, which diverge largely in concentration and biological activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01954258
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  • 2
    Electronic Resource
    Electronic Resource
    Transfer of a marine DNA virus fromEctocarpus toFeldmannia (Ectocarpales, Phaeophyceae): aberrant symptoms and restitution of the host (1993)
    Springer
    Protoplasma 175 (1993), S. 121-125 
    Details
    ISSN: 1615-6102
    Keywords: Ectocarpus ; Feldmannia ; Phaeophyceae ; DNA-virus, marine ; Intergeneric gene transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The marine brown algaEctocarpus siliculosus is invaded by a polyhedric virus, whose genome consists of circular, double-stranded DNA. In laboratory experiments this virus can infect a different host species,Feldmannia simplex. InfectedFeldmannia plants show severe somatic malformations. However, no functional virus particles are formed. SuchFeldmannia plants recover to resume a normal, symptom-free appearance. This result raises the possibility of intergeneric gene transfer in the natural habitat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01385009
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  • 3
    Electronic Resource
    Electronic Resource
    A virus infection inMyriotrichia clavaeformis (Dictyosiphonales, Phaeophyceae) from Argentina (1996)
    Springer
    Protoplasma 193 (1996), S. 58-62 
    Details
    ISSN: 1615-6102
    Keywords: Dictyosiphonales ; Infection ; Myriotrichia clavaeformis ; Phaeophyceae ; Virus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Virus-infected plants ofMyriotrichia clavaeformis from the coast of Argentina are sterile and produce viras particles in lateral vesicles homologous to plurilocular sporangia of normal plants. Virions are released into the surrounding sea water and can infect swimming spores of healthyMyriotrichia plants. Virus particles are hexagonal in cross section with a diameter of 170–180 nm and have an envelope with an electron dense core. Similar viruses are known for several genera in the order Ectocarpales. This is the first record of an infectious agent in the order Dictyosiphonales, which contains thalli with more complex tissues and life histories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276634
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  • 4
    Electronic Resource
    Electronic Resource
    Virus infections in three marine brown algae: Feldmannia irregularis, F. simplex, and Ectocarpus siliculosus (1993)
    Springer
    Hydrobiologia 260-261 (1993), S. 37-44 
    Details
    ISSN: 1573-5117
    Keywords: Virus infection ; marine ; Phaeophyceae ; Feldmannia ; Ectocarpus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Culture studies with healthy and virus-infected isolates of Ectocarpus siliculosus, Feldmannia simplex and F. irregularis gave the following results: Virus particles are produced in deformed reproductive organs (sporangia or gametangia) of the hosts and are released into the surrounding seawater. Their infective potential is lost after several days of storage under laboratory conditions. New infections occur when gametes or spores of the host get in contact with virus particles. The virus genome enters all cells of the developing new plant via mitosis. Virus expression is variable, and in many cases the viability of the host is not impaired. Infected host plants may be partly fertile and pass the infection to their daughter plants. Meiosis of the host can eliminate the virus genome and generate healthy progeny. The genome of the Ectocarpus virus consists of dsDNA. Meiotic segregation patterns suggest an intimate association between virus genome and host chromosomes. An extra-generic host range has been demonstrated for the Ectocarpus virus. Field observations suggest that virus infections in ectocarpalean algae occur on all coasts of the world, and many or all Ectocarpus and Feldmannia populations are subject to contact with virus genomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00049001
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  • 5
    Electronic Resource
    Electronic Resource
    Direct stereochemical assignment of sugar subunits in naturally occurring glycosides by low energy collision induced dissociation. Application to papulacandin antibiotics (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1988), S. 441-446 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A tandem mass spectrometric method is described which allows the assignment of stereochemistry to fragment ions comprising intact sugar subunits of larger glycosides without chemical degradation and product isolation by chromatography. The approach relies on the mass selection of the ‘sugar ion’ of interest followed by analysis of stereoselective fragmentation induced by low-energy collisional activation. The daughter ion spectra provide configurational fingerprints of the selected sugar ions which can be matched for identity with reference spectra obtained from suitable precursors of known stereochemistry. Glucose, mannose and galactose furnished the required set of the most important reference ions. By using peracetyl (and perdeuterioacetyl) derivatives, galactose was readily identified as the glycosidic sugar constituent of the (known) antibiotic papulacandin B and a further (unknown) congener.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200150805
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  • 6
    Electronic Resource
    Electronic Resource
    High temperature (GC)2 and (GC)2/CI-MS of nucleosides: Analysis of purinyl nucleoside isomer composition (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 161-165 
    Details
    ISSN: 0935-6304
    Keywords: GC, GC/MS ; Capillary, HMDS-deactivated ; On-column injection ; Nucleoside linkage isomers ; Separation, structural assignment feasibilities ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of low-volatile polar nucleosides by (GC)2/FID and (GC)2/CI-MS, employing HMDS-deactivated glass capillary columns and on-column injection, is described. The four linkage isomers of a specific nucleoside, formed in the synthetic procedure, are in each case sufficiently well separated in the chromatogram; GC/CI-MS allows for a differentiation of N-7 and N-9 linkage isomers.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240030402
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  • 7
    Electronic Resource
    Electronic Resource
    All-glass capillary T-joints and manifolds (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 411-412 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; All-glass T-joints and manifolds with small dead volume, production of ; Up to five-channel outlet splitter ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240030806
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Korrosion verzinkter Eisenwerkstoffe durch natürliche Brauchwässer (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 282-286 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion of galvanized ferrous materials by natural watersLaboratory and field test with galvanized irons do not reveal clear interrelations between water quality and corrosion. Likewise it is not possible on the basis of potential measurements to make any statement with respect to the formation of protective layers. It is for this reason that some doubt may be expressed as to the applicability of the test method according to DIN 50 930, the more so as the formation of ZnCO3 could be shown to take place in some few cases only.
    Notes: Laboratoriums- und Feldversuche mit verzinktem Eisen zeigen keine eindeutigen Zusammenhänge zwischen Wasserbeschaffenheit und Korrosion. Ebenso ist es nicht möglich, aufgrund von Potentialmessungen Aussagen über die Schutzschichtbildung zu machen. Aus diesem Grunde kann auch die Anwendbarkeit der Untersuchungsmethode nach DIN 50 930 in Zweifel gezogen werden, zumal nur in Einzelfällen die Bildung von ZrCO3 eindeutig nachgewiesen werden konnte.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19730240405
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  • 9
    Electronic Resource
    Electronic Resource
    Tandem mass spectrometric analysis of fixed-charge derivatized oligosaccharidesPresented at the 12th IMSC, Amsterdam, August 1991. (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 29 (1994), S. 713-719 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Various derivatives of a set of three isomeric (linear and branched) pentasaccharides (LNF-1, LNF-2 and LNF-3) were prepared and investigated by high-performance tandem mass spectrometry in order to compare their collision-induced dissociation (CID) behaviour. The fast atom bombardment tandem mass spectra of [M + H]+ ions of peracetylated derivatives mainly display fragments containing the non-reducing terminus (B-type ions) and allow a straightforward assignment of sugar sequence and branching together with the identification of some interglycosidic linkages. Permethylated derivatives, which better accommodate the mass range of tandem mass spectrometers in the case of larger oligosaccharides, yield similar results, i.e. predominance of B ions, but the necessary information has to be retrieved from incomplete Bi and Yi ion series. By contrast, CID of permethyl or peracetyl derivatives carrying a preformed charge due to prior reductive amination of the oligosaccharides with trimethyl(p-aminophenyl)ammonium chloride yields exclusively fragment ions comprising the reducing end. In this case, the four distinct series of fragments observed involve charge-remote fragmentation processes. As a consequence, the spectral patterns are not significantly affected by the nature of the sugar O-substituents additionally introduced (i.e. methyl or acetyl).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210291204
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  • 10
    Electronic Resource
    Electronic Resource
    High performance tandem mass spectrometry for sequence, branching and interglycosidic linkage analysis of peracetylated oligosaccharides (1990)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 19 (1990), S. 390-392 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200190611
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