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  • Chromatographie, Dünnschicht  (20)
  • liver  (15)
  • Neurosecretion
  • Springer  (40)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
  • 2015-2019
  • 2005-2009
  • 1975-1979  (40)
  • 1970-1974
  • 1977  (40)
Collection
Keywords
Publisher
  • Springer  (40)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
Years
  • 2015-2019
  • 2005-2009
  • 1975-1979  (40)
  • 1970-1974
Year
  • 1
    Electronic Resource
    Electronic Resource
    Genetics of aryl hydrocarbon hydroxylase induction in mice: Response of the lung to cigarette smoke and 3-methylcholanthrene (1977)
    Springer
    Biochemical genetics 15 (1977), S. 723-740 
    Details
    ISSN: 1573-4927
    Keywords: aryl hydrocarbon hydroxylase, gene loci controlling ; cigarette smoke ; mice ; lung ; liver ; 3-methylcholanthrene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract When mice from different inbred strains are injected intraperitoneally with 3-methylcholanthrene (MC), the activity of aryl hydrocarbon hydroxylase (AHH) rapidly increases in livers of some strains but not others. AHH plays a role in the metabolism of polycyclic hydrocarbons. Alleles at a small number of loci account for most of the variation in inducibility of hepatic AHH among mice, when MC is used as the inducing agent. Cigarette smoke is a common source of carcinogenic polycyclic hydrocarbons in the environment. Since some of the hydrocarbons in cigarette smoke are metabolized by AHH, the activity of AHH in tissues may affect the carcinogenicity of smoke in those tissues. The purpose of these experiments was to see whether induction of AHH in lung in response to cigarette smoke is regulated by the same genes that regulate induction of AHH in liver in response to MC. Mouse strains AKR/J and C57L/J and six recombinant inbred (RI) lines derived from them were tested for the response of AHH in lung and liver to parenteral MC or inhalation of cigarette smoke. Inducibility (the ratio of MC-induced AHH activities to basal AHH activities) in liver from MC-treated RI lines is bimodal and compatible with Mendelian segregation of genes at a small number of loci. Increased activities of AHH in MC-treated liver are associated with increased ability to metabolize BP and whole smoke condensates to mutagens detected by Salmonella typhimurium TA1538. Inducibility of AHH in lung in response to MC is not bimodal, and no definite conclusion about the number of loci can be made. When actual levels of AHH activity are considered, following the administration of MC as inducing agent, there is a correlation (r=0.89, p〈0.01) between AHH levels in liver and lung, suggesting that some genes affecting liver also affect lung. Basal and MC-induced AHH levels in lung are also correlated (r=0.86, p〈0.01). Mice with high basal activities have two to threefold higher levels of AHH after MC treatment than do mice with low basal activities. Induction of AHH in pulmonary tissues occurs in all mice after either parenteral MC or smoke inhalation. In contrast to MC treatment, AHH activities in lungs following smoke inhalation are not correlated with AHH levels in liver after MC (r=0.49) and are only weakly correlated with basal (r=0.66, 0.05〈p〈0.10) pulmonary levels. The correlation between MC-induced and smoke-induced AHH activities in lung is weak (r=0.63, 0.05〈p〈0.10). We conclude that the genetic regulation of AHH activity in lung is not as simple as the genetic regulation of AHH activity in liver, especially when complex inducing agents such as cigarette smoke are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00484100
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  • 2
    Electronic Resource
    Electronic Resource
    The ultrastructure of the sinus gland of Gammarus oceanicus (Crustacea: Amphipoda) (1977)
    Springer
    Cell & tissue research 182 (1977), S. 557-564 
    Details
    ISSN: 1432-0878
    Keywords: Sinus gland ; Gammarus ; Neurosecretion ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The sinus gland of Gammarus oceanicus, like that of other crustaceans, is composed of three elements: neurosecretory axons, glial cells and stromal sheath. Five neurosecretory axon types are identified on the basis of granule diameter, shape, and electron density, and axon matrix density. Exocytosis appears to be the major release mechanism of neurosecretory material. The preterminal regions of neurosecretory axons contain axoplasmic reticulum and neurotubules. Their arrangement in the axon and relationship with one another suggest a transport function. Multilamellar bodies are found in the terminal regions of neurosecretory axons. They arise from mitochondria and may be involved in granulolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219838
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  • 3
    Electronic Resource
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    Neurosecretion in the basommatophoran snail Bulinus truncatus (Gastropoda, Pulmonata) (1977)
    Springer
    Cell & tissue research 176 (1977), S. 57-67 
    Details
    ISSN: 1432-0878
    Keywords: Neurosecretion ; Alcian blue ; Alcian yellow staining ; Ultrastructure ; Bulinus truncatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The neurosecretory system of the freshwater snail Bulinus truncatus was investigated. With the Alcian blue-Alcian yellow (AB/AY) staining method at least 10 different types of neurosecretory cells (NSC) were distinguished in the ganglia of the central nervous system. The differences in staining properties of the NSC — with AB/AY the cells take on different shades of green and yellow — are borne out at the ultrastructural level: the NSC types contain different types of neurosecretory elementary granules. The neurosecretory system of B. truncatus is compared to that of Lymnaea stagnalis, the species which has received the most attention among the pulmonates. It appears from the comparison that the systems of both species show many similarities, although some differences are also apparent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220344
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  • 4
    Electronic Resource
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    Homologous neurosecretory cell groups in the land snail Achatina fulica and the sea slug Aplysia californica (1977)
    Springer
    Cell & tissue research 176 (1977), S. 109-120 
    Details
    ISSN: 1432-0878
    Keywords: Achatina fulica ; Aplysia californica ; Neurosecretion ; Homology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The right parietal ganglion of the African snail Achatina fulica contains an identifiable cluster of 20–40 white cells with somatic diameters of 80–110 μ. Cobalt chloride injection into these cells revealed an axon projection in the right parietal nerve as well as apparent terminations in the capsule. The cells contain an abundance of electron dense granules 1000–2000 Å in diameter which are formed in the Golgi apparatus. The granules stain with Gomori's chrome hematoxylin and paraldehyde fuchsin methods. While most cluster cells showed no “spontaneous” electrical activity, there was a correlation for the active cells between rate of activity and intensity of cell whiteness. These and other data suggest that the cluster cells are neurosecretory. A claim of homology with the “rostral white cells”, R3–R13, in the parieto-visceral ganglion of Aplysia is based on a similarity of morphological and electrophysiological features, together with analogous locations in the respective ganglia. It is concluded that the right parietal ganglion of Achatina is homologous with the right half of the parieto-visceral ganglion of Aplysia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220347
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  • 5
    Electronic Resource
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    Effect of benzo(a)pyrene on monolayer cultures of normal and malignant mouse liver cells (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1331-1334 
    Details
    ISSN: 1573-8221
    Keywords: benzo(a)pyrene ; liver ; hepatoma ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Cells of a monolayer culture of embryonic mouse liver, like cells of a culture of highly malignant hepatoma 22A, maintained by transplantation for 20 years, actively metabolized the carcinogenic hydrocarbon benzo(a)pyrene and are highly sensitive to its toxic action. Considering that liver tissue in vivo is resistant to carcinogenic hydrocarbons, the authors suggest that this resistance is due to factors acting at the organ or organism level but not at the cell level. The problem of the mechanism of preservation of the sensitivity of hepatoma 22A to the toxic action of benzo(a)pyrene also is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00805899
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  • 6
    Electronic Resource
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    Effect of enteral oxygen therapy on liver function in acute degeneration (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1413-1415 
    Details
    ISSN: 1573-8221
    Keywords: carbon tetrachloride ; oxygen ; liver ; bile acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The effect of enteral oxygen therapy was studied in rats with acute degeneration of the liver caused by CCl4. Intragastric injection of oxygen foam reduced the severity of poisoning and led to more rapid and complete recovery of the intensity of bile secretion, synthesis of primary bile acids, and their conjugation with amino acids, and improved the stabilizing properties of the bile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00801109
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  • 7
    Electronic Resource
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    Effect of alcohol on hepatocyte mitochondria (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1783-1784 
    Details
    ISSN: 1573-8221
    Keywords: mitochondria ; liver ; alcohol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Ultrastructural changes in the hepatocytes under the influence of alcohol were studied. The greatest changes were found in the mitochondria. Physical exertion and a low protein diet have a marked effect on the degree of alcohol poisoning. The first factor reduces whereas the second aggravates the harmful action of alcohol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00804836
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  • 8
    Electronic Resource
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    Changes in rat liver mitochondria after bilateral subdiaphragmatic vagotomy (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 487-490 
    Details
    ISSN: 1573-8221
    Keywords: mitochondrion ; liver ; vagotomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Changes in the liver mitochondria of rats after bilateral subdiaphragmatic vagotomy were studied. Two stages were distinguished in the dynamics of the response of the mitochondrial system to denervation. During the first stage (0.5–3 days after vagotomy) reversible functional disturbances due to postoperative stress took place in the mitochondria. The second stage (7–60 days after denervation) is characterized by more marked structural and functional changes with some common features with those observed in hypoxia and resulting from vagotomy itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807484
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  • 9
    Electronic Resource
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    Effect of absence of polyploid hepatocytes on regeneration in the liver (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1183-1186 
    Details
    ISSN: 1573-8221
    Keywords: liver ; polyploidy ; mitotic index ; index of labeled nuclei ; guinea pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract An autoradiographic study with [3H]thymidine showed that the hepatocytes of young sexually mature guinea pigs commence the phase of DNA synthesis 25 h after partial hepatectomy. Peaks of the number of labeled nuclei were found 30, 45, and 60 h after the operation. Two waves of mitoses were found by counting mitotic figures in squash preparations: 40 and 55 h after hepatectomy. A cytophotometric study of the DNA content showed that practically all the mononuclear and binuclear hepatocytes contained diploid nuclei 3 and 5 days after the operation. By the end of the 7th day of regeneration there were 6% of mononuclear tetraploid cells. The number of binuclear cells fell during the period of regeneration studied from 16 to 8%. It is concluded that the principal cytological mechanism of liver regeneration in guinea pigs is normal mitosis terminating in separation of the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799215
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  • 10
    Electronic Resource
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    Effect of chronic carbon tetrachloride poisoning on the turnover of RNA fractions in rat liver tissue (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 490-494 
    Details
    ISSN: 1573-8221
    Keywords: carbon tetrachloride ; liver ; RNA metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Changes in the content and incorporation of 5-3H-uridine after brief exposure to its labeled precursor were studied in the individual liver RNA fractions of rats during administration of carbon tetrachloride for 24 weeks. These fractions were obtained by preparative electrophoresis in 2.5% polyacrylamide gel from previously isolated nuclear and cytoplasmic RNA. Administration of CCl4 to rats was shown to reduce the quantity of transfer and ribosomal RNA in the liver tissue. Chronic CCl4 poisoning also disturbs the synchronization of the turnover of the individual components of fast-labeled RNA.
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    URL: http://dx.doi.org/10.1007/BF00807485
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  • 11
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    Microtubules in the neurosecretory neurones of the posterior pituitary of the rat (1977)
    Springer
    Cell & tissue research 180 (1977), S. 253-261 
    Details
    ISSN: 1432-0878
    Keywords: Microtubules ; Neurohypophysis ; Neurosecretion ; Axoplasmic transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The microtubules in the neurosecretory neurones of the posterior pituitary were studied using different electron microscopical techniques. Tannic acid staining indicated that the microtubules had a 13 protofilament substructure similar to that described for microtubules from other tissues and organisms; the dimensions of the microtubules were also similar to that previously reported. Albumen pretreatment clearly showed the microtubules running across axonal swellings, but not continuing across the nerve endings. The only organelles showing possible association with the microtubules were small vesicles and smooth endoplasmic reticulum, no association between hormone granules and microtubules could be seen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231957
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  • 12
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    The hypothalamo-choroidal tract (1977)
    Springer
    Cell & tissue research 178 (1977), S. 129-141 
    Details
    ISSN: 1432-0878
    Keywords: Choroid plexus ; Vasopressin ; Neurosecretion ; Rat ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Light and electron microscopic examination of choroid plexuses from lateral ventricles of water-deprived and subcutaneously or intravenously vasopressin administered rats reveal morphologic changes typical for vasopressin responsive fluid transporting epithelia during hormonal stimulation. Ultrastructural changes noted in both dehydrated and vasopressin treated animals included: the frequent occurrence of choroidal “dark” cells, dilatation of the lateral and basal intercellular spaces, increased vacuolization of the apical cytoplasm, and a change in microvillar conformation from the normal clavate type to those with a filiform shape. On the basis of the ultrastructural changes observed it is proposed that the choroid plexus be regarded as a target tissue for vasopressin. These findings indicated that a vasopressinmediated transchoroidal cerebrospinal fluid absorption capability exists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232830
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  • 13
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    Effect of an atherogenic diet on age differences in cholesterol biosynthesis in the rat liver (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 143-145 
    Details
    ISSN: 1573-8221
    Keywords: liver ; cholesterol biosynthesis ; age
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract After intraperitoneal injection of radioactive sodium acetate into rats of two age groups (6–8 and 28–32 months) the dynamics of cholesterol biosynthesis in the liver was observed to be slower in the older animals. The specific liver cholesterol activity of the older rats was lower at the maximum of uptake of the label than in the younger rats. An atherogenic diet for 20 days (0.25 g cholesterol/100 g body weight) led to an increase in the total cholesterol content but to inhibition of its biosynthesis in the liver, and this effect was most marked in the younger rats. Continued administration of cholesterol depressed its biosynthesis still more, especially in the older animals.
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    URL: http://dx.doi.org/10.1007/BF00799404
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  • 14
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    A multicomponent system of estradiol-binding proteins in rat liver cytosol and its dependence on sex steroids (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 647-650 
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    ISSN: 1573-8221
    Keywords: estrogens ; estradiol-binding proteins ; liver ; sex steroids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The marked sex differences in the ratio between the hormonal capacity of estradiol-binding components with Stokes' radii (a) of 7.0 and 2.5 nm observed in sexually mature animals are somewhat reduced but do not disappear completely after gonadectomy. Prolonged administration of estradiol (50 μg, 8days) to gonadectomized rats leads to depression of the estradiol-binding activity of all components of liver cytosol of females and males. Injection of testosterone propionate (2 mg, 8 days) into gonadectomized animals leads to selective stimulation of a special estrogen-binding protein with a=2.5 nm, normally characteristic of males alone, in both males and females. It is postulated that sex differences in the system of estradiol-binding proteins of the rat liver cytosol are due to sexual differentiation of the system in the early stages of development, on the one hand, and to the active regulatory influence of androgens and estrogens in the late stages of development, on the other hand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00800738
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  • 15
    Electronic Resource
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    Reflex mechanism of maintenance of magnesium homeostasis (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 925-928 
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    ISSN: 1573-8221
    Keywords: magnesium ; reflex ; liver ; receptors ; kidney
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Local stimulation of the liver by MgCl2 solution in unanesthetized dogs caused reflex excretion of magnesium through a change in tubular processes. The presence of receptors selectively sensitive to Mg in the liver is postulated. Information from these receptors was shown to spread among the vagus nerves.
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    URL: http://dx.doi.org/10.1007/BF00798506
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  • 16
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    Antithrombin activity after blockage of the reticuloendothelial system, splenectomy, and partial hepatectomy (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1249-1251 
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    ISSN: 1573-8221
    Keywords: antithrombins ; reticuloendothelial system ; liver ; spleen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract After destruction or removal of part of the liver in rats the levels of antithrombins II, III, and IV fell proportionally to the extent of the interference. Destruction of the spleen led to depression, but splenectomy led to activation of antithrombin IV. Blockade of the reticuloendothelial system caused a smaller decrease in the antithrombin level than partial hepatectomy. It is suggested that the spleen produces an inhibitor of antithrombin IV.
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    URL: http://dx.doi.org/10.1007/BF00805874
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  • 17
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    Morphological and functional changes in the immune system during reparative regeneration of the liver (1977)
    Springer
    Bulletin of experimental biology and medicine 84 (1977), S. 1491-1495 
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    ISSN: 1573-8221
    Keywords: liver ; regeneration ; immune system ; splenic colonies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract During reparative regeneration in the liver functional activity of the immune system is increased. Resection of the liver is accompanied by sharp changes in the structure of the thymus and spleen. The thymus-dependent parts of the spleen are particularly reactive. Resection of the liver in rats is accompanied by an increase in the number of stem cells in the bone marrow, as determined by the splenic colonies method. The number of colony-forming cells in the spleen of recipients of lymphocytes taken from the hepatectomized animals is significantly greater than in the spleen of recipients of lymphocytes from intact rats. If the limb is screened, ability to form endogenous colonies also is increased in partially hepatectomized rats compared with intact animals. Resection of the liver in rabbits is accompanied by a significant increase in immunological reactivity on the first to third days after the operation. The reactions of leukergia and leukocytolysis are sharply intensified during this period.
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    URL: http://dx.doi.org/10.1007/BF00801132
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  • 18
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    Role of specific iodothyronine-binding proteins in nucleo-cytoplasmic relations of thyroid hormones in liver cells (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 17-19 
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    ISSN: 1573-8221
    Keywords: thyroid hormones ; liver ; hormone receptors ; mechanism of action of hormones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The role of specific iodothyronine-binding proteins of hepatocytes in the nucleo-cytoplasmic relations of thyroid hormones in rats was investigated under normal conditions, after thyroidectomy, and in experimental thyrotoxicosis. The concentration of hormone-binding sites in the cell was shown to depend on the extracellular level of thyroid hormones. The important role of cytosol hormone-binding proteins in the accumulation and intracellular distribution of thyroid hormones is emphasized. Cytosol tri-iodothyronine-binding proteins were shown to play no part in penetration of the hormone into the nucleus. The tri-iodothyronine level in the nuclei was directly dependent on the concentration of receptor proteins in them and the degree of occupancy of the acceptor sites in the receptors themselves.
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    URL: http://dx.doi.org/10.1007/BF00802794
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  • 19
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    Changes in the distribution of carbonic anhydrase activity in the rat myocardium and liver during acute dichloroethane poisoning (histophotometric investigation) (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 108-110 
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    ISSN: 1573-8221
    Keywords: carbonic anhydrase activity ; dichloroethane ; liver ; myocardium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Histochemical changes in the distribution of carbonic anhydrase activity in the myocardium and liver of rats were studied after acute oral poisoning with dichloroethane. Kurate's method in Hausler's modification was used. For a semiquantitative assessment of the changes in enzyme activity a histophotometric method was used. A definite increase in carbonic anhydrase activity in the myocardium and liver was observed in most of the experimental animals and the index of correlation between these changes remained the same as in the intact rats.
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    URL: http://dx.doi.org/10.1007/BF00802821
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  • 20
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    Effect of glucocorticoids on α-fetoprotein synthesis and liver structure of mice with acute carbon tetrachloride poisoning (1977)
    Springer
    Bulletin of experimental biology and medicine 83 (1977), S. 146-148 
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    ISSN: 1573-8221
    Keywords: glucocorticoids ; α-fetoprotein ; liver ; carbon tetrachloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Experiments on male C57BL mice showed that inhalation of CCl4 for 15 min in a concentration of 0.05 ml/4 liters air causes severe degenerative changes in the liver with features of necrobiosis. However, phenomena of regeneration and cell infiltration arise as early as after 24 h and are accompanied by the secretion of α-fetoprotein into the blood stream. After 4 days the foci of necrobiosis disappear and are totally replaced by lymphocytes with large hepatocytes at the periphery. Processes of regeneration in animals receiving hydrocortisone (20 mg/kg) or dexamethasone (2 mg/kg) therapeutically or prophylactically were less marked and the number of animals producing α-fetoprotein was reduced from 92 to 60–65%.
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    URL: http://dx.doi.org/10.1007/BF00799405
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  • 21
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    Identification of LSD and ergot alkaloids by thin-layer chromatography (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 283 (1977), S. 32-32 
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    ISSN: 1618-2650
    Keywords: Nachw. von LSD, Ergot-Alkaloiden ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00439765
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  • 22
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    Thin-layer chromatography of some ergot alkaloids (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 284 (1977), S. 47-48 
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    ISSN: 1618-2650
    Keywords: Analyse von Ergotalkaloiden ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00464041
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  • 23
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    Detection and determination of dichlorovos (DDVP) in toxicological analysis (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 48-48 
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    ISSN: 1618-2650
    Keywords: Nachw., Best. von Dichlorvos in Biolog. Material ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00446021
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  • 24
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    Thin-layer chromatographic separation of some isomeric thiazolylbenzothiazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 255-255 
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    ISSN: 1618-2650
    Keywords: Trenn. von Thiazolylbenzothiazolen ; Chromatographie, Dünnschicht ; isomere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00453575
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  • 25
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    Electronic Resource
    Über chromatographische Trennungen der Seltenen Erden (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 50-53 
    Details
    ISSN: 1618-2650
    Keywords: Trenn, von Seltenen Erden ; Chromatographie, Dünnschicht ; Verteilungsverfahren ; Tetrahydrofuran, Triphenylphosphinoxid, Paraldehyd, Di-iso-propyläther-Tetrahydrofuran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Verteilungskonstanten von Selten-Erd-Nitraten im System Tributylphosphat-wäßrige Nitrat-Lösung werden berechnet. Dünnschicht-chromatographisch können mit Tributylphosphat in Isooctan als Laufmittel die Selten-Erd-Nitrate von La bis Gd vom Gd bis Lu getrennt werden. Eine Trennung von 13 Seltenen Erden auf einem Chromatogramm gelingt mit den Laufmitteln a) Tetrahydrofuran/Paraldehyd/Salpetersäure (20∶70∶10), b) dem Laufmittel Triphenylphosphinoxid (0,3 M in Paraldehyd) und konz. Salpetersäure im Verhältnis 90∶10, c) Di-iso-propyläther/Tetrahydrofuran/Salpetersäure (100 ∶ 60 ∶ 10). Der Trennmechanismus wird diskutiert.
    Notes: Abstract The distribution constants of the rare earth nitrates in the system tri-n-butylphosphate/aqueous nitrate solution are calculated. With thin-layer chromatography it is possible to separate the rare earth nitrates from La to Gd and from Gd to Lu in the solvent system tri-n-butylphosphate in i-octane. A separation of 13 rare earths in only one chromatogram is possible in the solvent systems a) tetrahydrofuran/paraldehyde/nitric acid (20∶70∶10), b) tri-phenylphosphinoxide (0.3 M in paraldehyde)/conc. nitric acid in the ratio 90∶10, c) di-iso-propylether/tetrahydrofuran/nitric acid (100∶60∶10). The mechanism of the separation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552348
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  • 26
    Electronic Resource
    Electronic Resource
    Steuergerät zur automatischen spektralphotometrischen Direktauswertung von Dünnschicht-Chromatogrammen (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 111-120 
    Details
    ISSN: 1618-2650
    Keywords: Chromatographie, Dünnschicht ; Steuergerät zur automatischen Registrierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein Gerät zur vollautomatischen Steuerung eines DC-Spektralphotometers wurde entwickelt. Zusätzlich zur automatischen Registrierung aller Spuren eines Dünnschicht-Chromatogramms werden Remissionsminima erkannt und ihre Remissionsgrade und Ortskoordinaten ausgedruckt. Eine zweite Betriebsart ermöglicht ein manuelles Abrastern und Ausmessen eines Fleckes an jeder beliebigen Stelle der DC-Platte. Ein Rechneranschluß zur Auswertung der Meßergebnisse ist vorhanden. An Hand von Beispielen wird gezeigt, daß Reproduzierbarkeits- und Konzentrationsfehler bei der automatischen Registrierung strichförmiger Flecke wesentlich kleiner sind als bei Handpositionierung kreisförmiger Flecke. Die Linearität verschiedener Analysenfunktionen wird über 2 Zehnerpotenzen der Strichbelegung untersucht. Dabei erweist sich die Kubelka-Munk-Funktion in bezug auf Linearität allen anderen untersuchten Funktionen überlegen. Eine Kosten-Nutzen-Rechnung zeigt, daß in einem Routinelabor durch Einsatz eines Auftragegerätes und eines Steuergerätes für die automatische Registrierung trotz höherer Investitionskosten die Gesamtkosten einer Analyse um 70% gesenkt werden können.
    Notes: Abstract An instrument has been constructed for the automatic control of a TLC spectrophotometer. In addition to the automatic scanning of all tracks of a thin-layer chromatogram the positions and values of diffuse reflectance minima are recognized and printed. A second mode allows the manual scanning and measurement of a spot at any position on the TLC plate. A digital output is provided for the evaluation of the results with a computer. The errors of reproducibility and of concentration are much smaller using the automatic scanning of bands than using the manual positioning of circular spots as the examples show. The linearity of several analytical functions is analysed within two decades of concentration. The Kubelka-Munk function was found to be superior in linearity to all other functions studied. Calculations of costs show, that the total costs of an analysis in a routine laboratory can be lowered to an extend of about 70% by the use of an application instrument and a controlling instrument for automatic scanning inspite of the higher costs of investments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00573709
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  • 27
    Electronic Resource
    Electronic Resource
    TLC Separation of potential antifertility agents: N-aryl-N′-2(p-methoxybenzoylbenzofuranyl)thiosemicarbazones (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 270-270 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Aryl-p-methoxybenzoylbenzofuranyl-thiosemicarbazonen, Contraceptiva ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00453591
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  • 28
    Electronic Resource
    Electronic Resource
    Dünnschicht-chromatographischer Nachweis herbicider Verbindungen durch Dansylierung (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 95-99 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. von Herbiciden ; Chromatographie, Dünnschicht ; Dansylierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von Dansylchlorid mit verschiedenen Herbiciden und Derivaten, die Aminogruppen enthalten oder zu Anilinen hydrolysierbar sind, wird beschrieben. Auf der Dünnschichtplatte lassen sich die fluorescierenden Stoffe gut trennen und identifizieren, was anhand von schematischen Darstellungen der Dünnschicht-Chromatogramme gezeigt wird.
    Notes: Abstract The reaction of dansyl chloride with various herbicides and derivatives containing amino groups or hydrolyzable to anilines is described. On TLC plates the fluorescent substances can be readily separated and identified as shown by diagrammatic representation of the thin-layer chromatograms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552357
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  • 29
    Electronic Resource
    Electronic Resource
    TLC separation of closely related diols (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 247-247 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Diolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155598
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  • 30
    Electronic Resource
    Electronic Resource
    Rapid TLC separation of some closely related coupled products ofβ-ketoester with aryldiazonium chlorides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 248-248 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Ketoester-Kupplungsprodukten ; Chromatographie, Dünnschicht ; Aryldiazoniumchloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155600
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  • 31
    Electronic Resource
    Electronic Resource
    TLC separation of some 4-phenyl substituted thiosemicarbazides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 249-249 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Thiosemicarbaziden ; Chromatographie, Dünnschicht ; 4-phenyl-substituiert
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155602
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  • 32
    Electronic Resource
    Electronic Resource
    TLC separation of 5,5-dimethylcyclohexane-2-arylhydrazono-1,2,3-triones (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 250-250 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von 5,5-Dimethylcyclohexan-2-arylhydrazon-1,2,3-trionen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155604
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  • 33
    Electronic Resource
    Electronic Resource
    TLC separation of some inorganic ions on EDTA impregnated plates. II (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 255-255 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Kationen ; Chromatographie, Dünnschicht ; ÄDTA-imprägn. Platten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155611
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  • 34
    Electronic Resource
    Electronic Resource
    TLC separation of potential antithyroid agents: N-aryl-N′-2(benzimidazolyl)thiocarbamides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 254-254 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Arylbenzimidazolyl-thiocarbamiden, Antithyroide Mittel ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155610
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  • 35
    Electronic Resource
    Electronic Resource
    Dünnschicht-chromatographische Routinebestimmung von Benz(a)pyren im Schwebstaub mit „in situ“-Auswertung (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 264-270 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Benzpyren in Schwebstaub ; Chromatographie, Dünnschicht ; Routinemethode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird ein Verfahren zur dünnschicht-chromatographischen Bestimmung von Benz(a)pyren im Schwebstaub beschrieben, bei dem nach Extraktion mit Cyclohexan im Ultraschallbad die Trennung eindimensional auf Celluloseacetat-Folien nacheinander mit den Laufmitteln 95%ig. Äthanol/Dichlormethan (8∶2) und Pyridin/Methanol/Wasser (3∶5∶2) durchgeführt wird. Die Auswertung erfolgt fluorimetrisch direkt auf der Platte. Das Verfahren, das eine sichere Abtrennung des Benz(a)pyrens von Benz(k)fluoranthen und Anthanthren erlaubt, ist für die Bestimmung von 0,4–20 ng Benz(a)pyren/m3 Luft bei 24stündiger Probenahme mit einem „High Volume Air Sampler“ geeignet. Eine Erweiterung des Arbeitsbereiches nach oben und unten ist möglich. Der Gesamtzeitbedarf für die Analyse von drei Filterproben beträgt rund 5 h, von denen etwa 3 h auf die chromatographische Entwicklung entfallen.
    Notes: Summary A method is described for the thin-layer chromatographic determination of benzo(a)pyrene in suspended particulate matter, including the ultrasonic extraction with cyclohexane and the separation on cellulose acetate thin-layer foils by subsequent development in one direction with 95% ethanol-dichloromethane (8∶2) and pyridine-methanol-water (3∶5∶2). The quantitative evaluation is carried out by fluorimetric scanning of the plate. The method permits a reliable separation of benzo(a)pyrene from benzo(k)fluoranthene and anthanthrene and is suited for the determination of 0.4–20 ng of benzo(a)pyrene/m3 of air, if sampling is done with a High Volume Air Sampler during 24 h. The total time necessary to analyze three filters is about 5 h, wherein the chromatographic development takes 3 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634497
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  • 36
    Electronic Resource
    Electronic Resource
    Zur Analytik der Xanthen-Derivate (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 312-313 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Bixanthenen ; Chromatographie, Dünnschicht ; Mikrobestimmung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634507
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  • 37
    Electronic Resource
    Electronic Resource
    T.L.C. Separation of some closely related potential antidiabetic N′-carbamyl-3,5-dimethyl-4-arylazopyrazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 319-319 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Carbamyldimethylarylazopyrazolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634514
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  • 38
    Electronic Resource
    Electronic Resource
    Dünnschicht-chromatographische Trennung und Nachweis der Seltenen Erden in Erzen, technischen Produkten und Rein-Elementen (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 28-31 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. und Trenn, von Seltenen Erden in Erzen, Monazit, Techn. Produkten ; Chromatographie, Dünnschicht ; Di-isopropyläther/Tetrahydrofuran/HNO3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung In Monaziten, technischen Produkten und Reinelementen (Verbindungen) wurden die Seltenen Erden dünnschicht-chromatographisch mit dem Laufmittel Di-isopropyläther-Tetrahydrofuran-Salpetersäure (65%) (100∶70∶6) getrennt und nachgewiesen. Mengenverhältnisse von 400∶1 sind zu trennen und eindeutig zu identifizieren. Bei größeren Unterschieden in den Rf-Werten kann das Verhältnis bis zu 1000∶1 betragen. Die absolut nachweisbare Menge auf einem Chromatogramm beträgt 0,05–0,1 μg. Die Größe der Flecken ermöglicht eine halbquantitative Abschätzung der Gehalte. Die Analysendauer beträgt mit Aufschluß 2 h, ohne Aufschluß 70 min.
    Notes: Summary In monazites, technical products and pure elements, rare earth elements were separated and identified by thin-layer chromatography using a 100∶70∶6 mixture of diisopropyl ether, tetrahydrofuran and HNO3 (65%) as an eluent. It is possible to separate and characterize them in concentrations of 400∶1 unambiguously. If the Rf-values differ remarkably a ratio of 1000∶1 is acceptable. The amount absolutely detectable on a chromatogram is 0.05–0.1 μg. The area of the spots allows a semiquantitative estimation. The time required for one analyses is without decomposition 70 min and including decomposition 2 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634316
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  • 39
    Electronic Resource
    Electronic Resource
    TLC separation of some isomeric 2- and 6-[2-amino (and substituted amino)-4-thiazolyl] benzothiazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 285-285 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Aminothiazolyl-benzothiazolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539397
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  • 40
    Electronic Resource
    Electronic Resource
    Dünnschicht-chromatographische Trennung und Nachweis der Seltenen Erden aus einer Uran-Matrix (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 288-288 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Seltenen Erden aus Uran ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539399
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