ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    In:  Mike.Twiner@noaa.gov | http://aquaticcommons.org/id/eprint/14901 | 403 | 2014-03-10 19:58:44 | 14901 | United States National Ocean Service
    Publication Date: 2021-06-28
    Description: Azaspiracids (AZA) are polyether marine toxins that accumulate in various shellfish species and have been associated with severe gastrointestinal human intoxications since 1995. This toxin class has since been reported from several countries, including Morocco and much of western Europe. A regulatory limit of 160 μg AZA/kg wholeshellfish flesh was established by the EU in order to protect human health; however, in some cases, AZA concentrations far exceed the action level. Herein we discuss recent advances on the chemistry of various AZA analogs, review the ecology of AZAs, including the putative progenitor algal species, collectively interpret the in vitro and in vivo data on the toxicology of AZAs relating to human health issues, and outline the European legislature associated with AZAs.
    Keywords: Chemistry ; Ecology ; Fisheries ; Health
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 39-72
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 94 (1961), S. 1717-1722 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Friedel-Crafts-Reaktion des α-Benzoyl-Δ-chlor-γ-valerolactons mit Benzol und Aluminiumchlorid führt zu 1-Benzoyl-1.2.3.4-tetrahydro-naphthalin, [γ.δ-Diphenyl-n-butyl]-phenyl-keton sowie zu α-Tetralon und einigen in 4-Stellung substituierten α-Tetralonen. Mit Aluminiumchlorid im überschuß treten zusätzlich Reduktionen und Spaltungen von C—C-Bindungen ein. Insgesamt konnten elf Reaktionsprodukte isoliert werden. Der Reaktionsmechanismus wird diskutiert.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 95 (1962), S. 1989-1991 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Friedel-Crafts-Reaktion des α-Acetyl-δ-chlor-γ-valerolactons mit Benzol und Aluminiumchlorid führt über das [γ.δ-Dichlor-n-butyl]-methyl-keton zum [γ.δ-Diphenyl-n-butyl]-methyl-keton und unter Spaltung von C—C Bindungen zu Aceton, Acetophenon und Methyl-[α-phenyl-äthyl]-keton.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3943-3946 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of the Dimeric (Isopropylidenamino)dimethylgallaneDimeric (isopropylidenamino)dimethylgallane crystallizes in the triclinic space group P1¯ with one dimeric molecule per unit cell. The monomeric units were combined to a Ga-N-four-membered ring, including the center of symmetry. The mean distances are: Ga—N 1.989, Ga—C 1.966, N=C 1.266, C—C 1.504 Å.
    Notes: Dimeres (Isopropylidenamino)dimethylgallan kristallisiert in der triklinen Raumgruppe P1¯ mit einem dimeren Molekül in der Elementarzelle. Dabei sind die monomeren Einheiten über das Symmetriezentrum zu einem Ga-N-Vierring verbunden. Die mittleren Bindungslängen sind: Ga—N 1.989, Ga—C 1.966, N=C 1.266, C—C 1.504 Å.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 96 (1963), S. 2193-2198 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Umsetzung δ-halogenierter α-Acetyl- und α-Benzoyl-γ-valerolactone mit wäßriger Chlorwasserstoff-, Bromwasserstoff- und Fluorwasserstoffsäure entstehen unter Decarboxylierung γ.δ-dihalogenierte n-Butyl-methyl-ketone und n-Butyl-phenyl-ketone.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 2269-2273 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure Determination of Boron Nitrogen Compounds, VI. The Crystal and Molecular Structure of Dichloro(diphenylamino)boraneDichloro(diphenylamino)borane crystallizes in the monoclinic space group P21 with a = 13.84, b = 7.77, c = 5.86 Å, β = 102.45° and two molecules per unit cell. The molecule was found to have a nearly planar Cl2BNC2-skeleton, whereas the phenyl groups are strongly tilted out of this plane. The B—N distance of 1.380 Å suggests that the boron and nitrogen atoms are linked by a double bond.
    Notes: Dichlor(diphenylamino)boran kristallisiert in der monoklinen Raumgruppe P21 mit a = 13.84, b = 7.77, c = 5.86 Å, β = 102.45° und 2 Molekülen in der Elementarzelle. Das Molekül zeigt ein nahezu planares Cl2BNC2-Gerüst, während die Phenylgruppen sehr stark aus dieser Ebene herausgedreht sind. Der B—N-Abstand mit 1.380 Å läßt auf eine Bor-Stickstoff-Doppelbindung schließen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 82 (1913), S. 103-129 
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 8 (1977), S. 425-432 
    ISSN: 0933-5137
    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: Materials Stressing at Oscillating Sliding MovementAt oscillating sliding movements in a tribological system (e.g. pistonring - cylinder) the filmthickness changes in a wide range during a stroke. Especially in the range of the deadcenters a hydrodynamic lubricant film cannot always be formed. The mixed lubrication than leads to an increasing material stressing in these regions. the change in sliding direction causes a repeated change in the direction of the materials stressing. The materials stressing is calculated for different load functions.
    Notes: Bei oszillierendem Bewegungsablauf in einem tribologischen System (z. B. Kolbenring- Zylinder) ändert sich die Schmierfilmhöhe über dem Hub in weiten Bereichen. Insbesondere durch die Bewegungsverhältnisse im Bereich der Totpunkte kann sich dort vielfach keit hydrodynamischer Schmierfilm ausbilden. Der dadurch bedingte Mischreibungszustand führt zu einer erhöhten Werkstoffbeanspruchung in den Totpunktbereichen. Die ständige änderung der Bewegungsrichtung hat zudem einen fortwährenden Wechsel der Beanspruchungsrichtung zur Folge. Die Werkstofanstrengung wird für verschiedene Lastannahmen ermittelt.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 9 (1978), S. 445-451 
    ISSN: 0933-5137
    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: Tribological Effect of different Fluorocarbon RefrigerantsFluorine and chlorine substituted organic compounds of the methan and ethan type are used in refrigerators, air conditioners and cooling systems. Besides their physical effect the different fluorocarbons have an effect on the tribological behavior of the different machine parts.
    Notes: Halogenierte Kohlenwasserstoffe werden als Arbeitsstoffe in Kältemaschinen eingesetzt. Durch die konstruktiven Gegebenheiten - insbesondere bei kleinen und mittleren Verdichtern - haben Halogen-Kohlenwasserstoff, Schmierstoff und Werkstoffe Kontakt miteinander. Halogen-Kohlenwasserstoffe können sich im Schmierstoff lösen und erniedrigen dadurch die Viskosität des Schmierstoffs. Darüber hinaus können zwischen dem Schmierstoff, dem Halogen-Kohlenwasserstoff und den Werkstoffen des Kältemittelverdichters, die mit ihnen in Berührung stehen, chemische Reaktionen ablaufen, die z. B. das Verschleißverhalten tribologisch beanspruchter Bauteilpaarungen erheblich beeinflussen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...