ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • Springer  (92)
  • 1980-1984  (92)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Biosynthesis of neutral lipids by Euchaeta norvegica (1980)
    Springer
    Marine biology 56 (1980), S. 1-6 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A comparison was made of neutral lipid biosynthesis by intact Euchaeta norvegica, gut tissue isolated from E. norvegica and the E. norvegica from which the gut tissue had been removed. Incorporation of radioactive glucose and alanine into triacylglycerols by all three systems exceeded that into wax esters. Whereas 86.7% of the glucose incorporated into triacylglycerols by gut tissue was located in the glycerol moiety, only 21.8 and 23.8% of glucose incorporated into triacylglycerols by intact and disembowelled copepods, respectively, was recovered in the glycerol moiety. Incorporated alanine in triacylglycerols was always located preferentially in the fatty acid moiety. Radioactive hexadecanol was always extensively incorporated into wax esters, with internal tissues being much more active than gut tissue. The major portion of glucose and alanine incorporated into wax esters was in the fatty alcohol moiety. Gut tissue was much more active than internal tissues in oxidising hexadecanol to hexadecanoic acid. We conclude that gut tissue synthesises glycerol 3-phosphate for use in the esterification of dietary fatty acids to form triacylglycerols. Gut tissue is also activenin oxidising dietary fatty alcohols. Fatty acid biosynthesis, leading to wax ester formation, is a property of internal tissues rather than of the gut.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390587
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Lipogenesis in the arctic euphausiid Thysanoessa inermis (1981)
    Springer
    Marine biology 63 (1981), S. 235-240 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Biosynthesis of lipids by Thysanoessa inermis collected from Balsfjorden, northern Norway, in May 1980, was examined in vitro. The highest concentration of lipid within the krill was in the “hepatopancreas”, and this organ was the most active in esterifying free fatty acids into wax esters. The “hepatopancreas” (i.e., thoracic contents) incorporated (14C) glucose, (14C) alanine and 3H2O into wax esters, with the fatty alcohol moieties being labelled more than the fatty acids. (14C) fatty acid was incorporated preferentially into the fatty acid moieties of wax esters, this incorporation being markedly stimulated by free fatty alcohol. It is concluded that the fatty alcohols of wax esters are preferentially biosynthesized de novo from dietary protein and carbohydrates, whereas the fatty acids derive preferentially from dietary lipid. On the basis of 3H incorporated from 3H2O, the hepatopancreas in a 50 mg II-group (2 yr old) individual of T. inermis is capable of biosynthesizing de novo, approximately 0.1 mg of lipid (as fatty acids) per day at 5°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395992
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Changes in the content and fatty acid composition of lipid in an isolated population of the capelin Mallotus villosus during sexual maturation and spawning (1984)
    Springer
    Marine biology 78 (1984), S. 255-263 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in the wet weights and lipid contents of muscle, liver and gonad were determined in male and female Mallotus villosus in Balsfjorden, northern Norway, in 1981, from January, when gonadal development becomes noticeable, until May when the fish are spawning. Fatty acid compositions of tissue lipids were also determined. Over 4 mo prior to spawning, the weight of muscle in female capelin decreased by 32% while the weight of the ovary increased exponentially by 830%. In males the weight of the muscle remained constant and that of the testis decreased slightly. The lipid contents of the muscle of both males and females decreased by 76% over the period and an inverse relationship existed between the water and lipid contents of muscle in both sexes. Male liver weight remained constant over the period of study whereas female liver weight increased transiently by 300% between January and March. 38% of the lipid lost from female muscle was accounted for by lipid deposited in ovary whereas negligible amounts of the lipid lost from male muscle was accounted for by lipid in the testis. Gonadal lipid was always richer in polyunsaturated fatty acids than muscle lipid and, immediately prior to spawning, 42% of the fatty acids in ovarian lipid were polyunsaturated. Muscle lipid of males and females showed a progressive increase in the percentage of the long-chain monoenes 20:1 and 22:1 between January and May. It is concluded that male capelin catabolise more of their muscle lipid reserves than females in the 4 mo prior to spawning and that most of the lipid catabolism in males is associated with physical activity. Conversely, females deposit much more of their muscle lipid in gonads than males, although considerable selectivity occurs in the mobilisation of fatty acids from muscle lipid into ovarian lipid. Additionally, biosynthesis of gonadal constituents accounts for a considerable proportion of the lipid catabolised in females.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393011
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The composition and biosynthesis of lipids in Thysanoessa raschi from the Clyde Estuary, Scotland (1982)
    Springer
    Marine biology 70 (1982), S. 7-12 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The lipid composition and biosynthesising activity of Thysanoessa raschi collected from the Clyde Estuary, Scotland, in May 1981 were examined. Triacylglycerols were the major lipid class present, although 16.7% of the total lipid were wax esters in which phytol was the dominant fatty alcohol. The thoracic contents (“hepatopancreas”) of the krill were capable of biosynthesising lipids in vitro from various labelled substrates. Radioactivity from [1-14C] palmitic acid was incorporated into lipids in the order phospholipids〉triacylglycerols〉wax esters; the bulk of the radioactivity was present in all cases in the fatty acyl moieties of the lipids. [U-14C] glucose labelled lipids in the order phospholipids〉triacylglycerols〉free fatty acids〉 was esters; in the first two lipids the radioactivity was mainly in the glycerol moieties, whereas in was esters it was solely in the fatty acyl moieties. The extent of labelling of these lipids from [U-14C] alanine was less than that from [U-14C] glucose, but the pattern of labelling was generally similar. More than 90% of the radioactivity incorporated into total lipid from 3H2O was present in free fatty acids from which it was calculated that the “hepatopancreas” of T. raschi can synthesise 2.5 μg of fatty acid per hour at 15°C. This value is approximately three times lower than that previously determined for T. inermis from Balsfjorden, northern Norway. The results are discussed in terms of the sources of the dietary lipids of krill and the role of endogenous biosynthesis in contributing to its lipid reserves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397290
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Beware of formaldehyde in disguise (1982)
    Springer
    European journal of clinical pharmacology 23 (1982), S. 373-375 
    Details
    ISSN: 1432-1041
    Keywords: formaldehyde ; methenamine ; health hazards ; carcinogenicity ; mutagenicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The toxic potential of formaldehyde has recently been widely discussed, including the consequences of its release from certain building materials. The action of methenamine, used in the treatment of urinary infections, is based on the release of formaldehyde in the body. Various aspects of formaldehyde toxicity are discussed as a basis for reevaluation of methenamine and reconsideration of its safety.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00613624
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Rare earth element partition between sphene, apatite and other coexisting minerals of the Kangerdlugssuaq intrusion, E. Greenland (1980)
    Springer
    Contributions to mineralogy and petrology 72 (1980), S. 81-85 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Cumulus apatite, sphene, feldspar, amphibole and biotite from the pulaskite of the Kangerdlugssuaq alkaline intrusion have been analysed for rare earth elements (REE) by instrumental neutron activation analysis. The apatite is particularly rich in REE, contains 3.6% Ce and shows a steep, light REE-enriched, chondrite-normalised pattern. The other minerals have light REE enrichment but with sphene showing a peak at Ce on a chondrite-normalised plot. REE partition coefficient values show that the light REE are preferentially accommodated by apatite relative to sphene. The differences in these coefficients result from differences in the co-ordination of the REE in the two minerals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00375570
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Toxic and teratogenic effects of hydrazine on fathead minnow (Pimephales promelas) embryos (1981)
    Springer
    Bulletin of environmental contamination and toxicology 26 (1981), S. 807-812 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01622175
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Scale morphologic response to aromatic hydrocarbons (1983)
    Springer
    Bulletin of environmental contamination and toxicology 31 (1983), S. 315-321 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01608705
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effect of polychlorinated biphenyls (Aroclor 1254) on rhythmic pituitary-adrenal function (1983)
    Springer
    Bulletin of environmental contamination and toxicology 31 (1983), S. 322-325 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01608706
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    The behaviour of tungsten in granitic melt-vapour systems (1984)
    Springer
    Contributions to mineralogy and petrology 86 (1984), S. 286-293 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract An experimental study has been carried out to determine the effect of solution composition on the partitioning behaviour of tungsten in granitic melt-vapour systems at 800° C and 1 kbar. With chloride and phosphate solutions, tungsten partitions strongly into the aqueous phase, whereas with fluoride, carbonate and borate solutions, and water alone, tungsten partitions in favour of the melt. With chloride solutions, the fluid/melt partition coefficients (K D) for W show a marked positive correlation with chloride concentration, and suggest that at low chloride concentrations W-Cl complexes with low Cl∶W ratios (such as associated equivalents of (WO3)2C1−) may be present. In contrast, at higher chloride concentrations complexes with high Cl∶W ratios (such as WOCl4, WCl6 and associated ionic equivalents) may predominate. With phosphate solutions, K D shows little variation with phosphate concentration, and phosphorus heteropolytungstates (such as H3[PW12O40]) may be present. There is no evidence to suggest that fluoride, carbonate or borate complexes of tungsten are important under the experimental conditions: the data for these compositions can be interpreted assuming that isopolytungstates (such as H6[H2W12O40]) are present. Within high temperature hydrothermal solutions tungsten may be transported principally as isopolytungstates and heteropolytungstates in addition to chloride complexes, and this may, in part, account for the common association of apatite and arsenopyrite with scheelite and wolframite in tungsten deposits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373674
    Location Call Number Expected 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...