GLORIA

GEOMAR Library Ocean Research Information Access

X
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
  • Chemistry  (54)
  • Cadmium  (3)
  • 1990-1994  (13)
  • 1980-1984  (13)
  • 1970-1974  (15)
  • 1965-1969  (16)
  • 1
    Electronic Resource
    Electronic Resource
    Cadmium in finnish breast milk, a longitudinal study (1983)
    Springer
    Archives of toxicology 53 (1983), S. 207-211 
    Details
    ISSN: 1432-0738
    Keywords: Milk ; Human ; Cadmium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Electrothermal atomic absorption spectrophotometry was employed to analyse cadmium in breast milk. Twenty breast milk samples were donated by seven mothers during 6 months of lactation. All milk samples represented every feeding during a period of 24 h, having foremilk an hindmilk in equal proportions. The median cadmium concentration in the 1st month was 2.0 μg/l (range 1.7–3.1 μg/l, 7 samples) and then declined to 1.5 μg/l (range 1.3–2.5 μg/l, 7 samples) and 1.6 μg/l (range 1.2–2.0 μg/l, 6 samples) in the 3rd and 6th months, respectively. At the age of 1 and 3 months when the infants were totally breast fed the average weekly intake of cadmium was 2.7 and 1.5 μg/kg. This is below the provisional tolerable weekly intake of man, from 6.7 to 8.3 μg/kg, proposed by WHO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00316504
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The impact of an industrially contaminated lake on heavy metal levels in its effluent stream (1980)
    Springer
    Hydrobiologia 69 (1980), S. 187-193 
    Details
    ISSN: 1573-5117
    Keywords: Cadmium ; zinc ; pollution ; sediment ; water ; fish ; clams ; macrophytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Levels of cadmium and zinc in various components of Williamson Ditch (an industrially contaminated stream flowing into Palestine Lake), Trimble Creek (a stream draining Palestine Lake) and the Tippecance River (a river receiving Trimble Creek) were determined. Water, sediment, plant, fish and clam samples were analyzed for cadmium and zinc content by atomic absorption spectrophotometry. Unweighted mean metal concentrations in Trimble Creek were the following: water, 51 µg Zn/1 and 4.2 µg Cd/1; sediment, 592 µg Zn/g and 48.8,µg Cd/g; plants, 375 µm Zn/g and 7.91 µg Cd/g; fish, 145 µg Zn/g and 6.02 µg Cd/g. These concentrations were generally lower than those found in Williamson Ditch and higher than those found in the Tippecanoe River or background levels previously reported for other aquatic ecosystems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016549
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The use of the three-ridge clam (Amblema perplicata) to monitor trace metal contamination (1981)
    Springer
    Hydrobiologia 83 (1981), S. 67-72 
    Details
    ISSN: 1573-5117
    Keywords: Cadmium ; zinc ; pollution ; molluscs ; monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The three-ridge clamAmblema perplicata was used to monitor two streams for the presence of zinc (Zn) and cadmium (Cd) derived from an industrial source. Clams were collected from a relatively uncontaminated area in one river and transported to four study sites in the two contaminated streams. The clams were placed into polyethylene cages and left in these streams for one week. Control clams were treated in a similar manner and left in the uncontaminated river. The highest mean concentration of Zn (956 µg/g dry wt) was found in the gill tissue of clams from the most contaminated site. The highest mean Cd concentration (18.6 µg/ g dry wt) was found in digestive glands of clams, also from the most contaminated site. Mean concentrations at contaminated sites were significantly higher than background and control levels; the findings suggest that these particular organs of clams may be useful in monitoring levels of Zn and Cd in other freshwater systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187151
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Dialkylamino-phosphane, VII: Tris(dimethylamino)-phosphonium-Salze (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 1981-1987 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tris(dimethylamino)-phosphan addiert Halogene (Cl2, Br2, J2) zu Tris(dimethylamino)-halogeno-phosphonium-halogeniden. Einige ihrer Eigenschaften werden beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980637
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Chromatographische Trennung und quantitative Bestimmung aller acht Stereoisomeren von α-TocopherolHerrn Dr. Otto Isler zum 80. Geburtstag gewidmet (1990)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 73 (1990), S. 782-789 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Separation and Quantitation of All Eight Stereoisomers of α-Tocopherol by ChromatographyThe results of the analysis of several derivatives of (all-rac)-α-tocopherol by HPLC on a chiral stationary phase and by capillary GC on a achiral stationary phase are reported. Consecutive application of both methods to the ethyl-ether derivative allows the separation and quantification of all eight possible stereoisomers of (all-rac)-α-tocopherol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19900730403
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Statistische Synthesen von Rotaxanen (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 941-954 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Statistical Syntheses of RotaxanesThe acetalisation of the 28-membered cyclic diols 11a, b with the long-chain dibromo ketone 12 gives acetals 13a, b. These compounds react with triphenylmethyllithium to give 17a, b and 18a, b from which the rotaxanes 20a, b are obtained in 0.066 or 0.18 and 0.12% yield, respectively, after hydrolysis of the acetal bonds. The reacetalisation of rotaxane 20b affords, by an intraannular reaction, the prerotaxane 18b in pure form.
    Notes: Die Acetalisierung der 28-gliedrigen cyclischen Diole 11a, b mit dem langkettigen Dibromketon 12 ergibt die Acetale 13a, b. Nach Umsetzung mit Triphenylmethyllithium zu 17a, b und 18a, b werden nach Hydrolyse der Acetalbindungen die Rotaxane 20a, b in Ausbeuten von 0.066 und 0.18 bzw. 0.12% als farblose Öle isoliert. Durch Reacetalisierung von 20b wird in einer intraannularen Reaktion das Prärotaxan 18b in reiner Form erhalten.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130314
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    2-Pyridylhydrazone als Carbonylderivate zur Steuerung der Fragmentierung in der MassenspektrometrieHerrn Prof. Dr. Walter Boguth zum 65.Geburtstag gewidmet (1982)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 65 (1982), S. 1038-1044 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2-Pyridylhydrazones as Carbonyl Derivatives to induce Fragmentation in Mass SpectrometryIt was found that the 2-pyridylhydrazone is a derivative of the carbonyl group, which is able to induce fragmentation of an alicyclic skeleton with an efficiency comparable to that of the tertiary amino group and the ethylene acetal group.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19820650336
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Gezielte Synthese von Catena-Verbindungen, XIII. Zur Struktur von Bis-diansa-Verbindungen (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3582-3586 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Directed Synthesis of Catenanes, XIII. Structure of Bis-diansa CompoundsCyclization of diamine 1 under high dilution conditions afforded compound 2 with bis-diansa structure as the main product. The two bridged cis-trans isomeric compounds 8 and 13 could be isolated as byproducts. The structure of these compounds was determined by mass spectrometry and confirmed by preparing the tetraacetates 4 and 10. Rupture of the bonds between the aromatic nuclei and the bridged system in compound 2 resulted in the formation of the 22-membered macroheterocycle 6. In an analogous manner the 44-membered macroheterocycle 12 was prepared from one of the bridged compounds (8 or 13).
    Notes: Die Cyclisierung des Diamins 1 unter Verdünnungsbedingungen liefert als Hauptprodukt die Bis-diansa-Verbindung 2. Als Nebenprodukte werden die überbrückten cis-trans-isomeren Verbindungen 8 und 13 isoliert. Die massenspektrometrisch getroffenen Strukturzuordnungen wurden durch Darstellung der Tetraacetate 4 und 10 bestätigt. Nach Lösen der Bindungen zwischen den aromatischen Kernen und den doppelhenkligen Systemen konnte aus 2 weiterhin der 22-gliedrige Makroheterocyclus 6 erhalten werden, aus der überbrückten Verbindung (8 oder 13) dagegen der 44-gliedrige Makroheterocyclus 12.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711041123
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Rotaxan-Verbindungen, III. Synthese eines Rotaxans mit Triphenylmethyl-Sperrgruppen und massenspektrometrische Untersuchungen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 228-235 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Rotaxane Compounds, III. Synthesis of a Rotaxane with Triphenylmethyl Residues as Bulky Groups and Mass Spectrometric InvestigationsStarting from the diansa dibromide 1 the rotaxane 5 is synthesized via the prerotaxane 2. The mass spectrum exhibits the peak of the molecular ion at mfe 1493 and the expected fragmentation pattern.
    Notes: Ausgehend von dem Diansa-Dibromid 1 wird über das Prärotaxan 2 das Rotaxan 5 synthetisiert. Das Massenspektrum der Verbindung zeigt bei mfe 1493 den Peak des Molekül-Ions und das erwartete Fragmentierungsbild.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060128
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Thermolyse von Acetoxy-alkylbenzolen und Hydroxy- alkylbenzolen (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 424-441 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermolysis of Acetoxy-alkylbenzene and Hydroxy-alkylbenzene DerivativesThe thermolysis of long chain acetoxy-alkylbenzene and hydroxy-alkylbenzene derivatives at 340-350°C affords, probably via a radical reaction, products in which acetoxy or hydroxy groups and/or alkyl residues are substituted by hydrogen (tables 1, 2). The yields vary with type, number, and position of substituents on the benzene ring. The thermolysis of hydroxydialkylbenzene derivatives 14 and 20 gives in addition hydroxy-triaklylbenzene derivatives formed by transfer of alkyl radicals.
    Notes: Die Thermolyse von langkettigen Acetoxy-alkylbenzolen und Hydroxy-alkylbenzolen bei 340-350°C liefert in einer vermutlich radikalisch ablaufenden Reaktion Produkte, in denen Acetoxy-bzw. Hydroxygruppen und/oder Alkylreste durch Wasserstoff ersetzt sind (Tab. 1, 2). Die Ausbeuten sind von der Art, der Anzahl und der Stellung der Substituenten am Benzolkern abhängig. Die Thermolyse der Dialkyl-hydroxybenzole 14 und 20 ergibt zusätzlich Trialkyl-hydroxybenzole, die durch Übertragung von Alkyl-Radikalen entstehen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070207
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...