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Facet   Publication Year 1978  [X]
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1978[X]
21Author    Hartmut Blecher, Renate Blecher, Rudolf Müller, Franz LingensRequires cookie*
 Title    Isolierung und Charakterisierung Antipyrin-abbauender Bakterien Isolation and Characterization of Antipyrine-degrading Bacteria  
 Abstract    Five different strains of bacteria ultilizing antipyrine as sole source of carbon were isolated from soil. It was shown by morphological and physiological examinations, that the new isolates are closely related to strains selected with the herbicide chloridazon. A ll of these bacteria are charac­ terized by special features and cannot be classified according to Bergey's Manual of Determinative Bacteriology. Part of the strains which were selected with antipyrine not only grow with antipyrine but also with chloridazon. The others cannot be grown on chloridazon. However, resting cells of the latter group convert chloridazon to its catechol derivative (5-amino-4-chloro-2 (2,3-dihydroxyphenyl) -3 (2H)-pyridazinone). In these bacteria a catechol-2,3-dioxygenase (catechol: oxygen 2,3-oxido-reductase, EC 1.13.11.2) was found which readily catalyzes the cleavage of the catechol derivative of antipyrine (2,3-dimethyl-l-(2,3-dihydroxyphenyl)-pyrazolone (5)). The enzyme shows only slight activity with the corresponding derivative of chloridazon. 
  Reference    Z. Naturforsch. 33c, 120 (1978); eingegangen am 27. Oktober 1977 
  Published    1978 
  Keywords    Antipyrine, Chloridazon, Bacterial Degradation, Catechol: Oxygen 2, 3-Oxidoreductase 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0120.pdf 
 Identifier    ZNC-1978-33c-0120 
 Volume    33 
22Author    Hermann Frank, Heinz Schwarz, Thomas Graf, Werner SchäferRequires cookie*
 Title    Properties of Mouse Leukemia Viruses X V . Electron Microscopic Studies on the Organization of Friend Leukemia Virus and Other Mammalian C-Type Viruses  
 Abstract    Further investigations on the structure of Friend murine leukemia virus (FLV) revealed that the transition from the "immature" (now termed "native") to the structurally less organized "mature" (now termed "collapsed") form occurs mainly as a result of the preparation for the electron microscope. A short pretreatment of virus with the detergent NP40 prior to negative staining with uranyl acetate is able to preserve the "native" structure of a high percentage of virus particles from standard preparations. Treatment with conventional fixatives was found to be in ­ effective. Using this preparation technique, a more detailed electron microscopic analysis of the viral internal organization became possible. A thin layer designated "inner coat" was newly detected in close apposition to the viral membrane between the viral envelope and core. Removal of the unit membrane by more intensive detergent treatment suggests the existence of material extending be­ tween the viral surface knobs and the viral interior. The icosahedral core shell has an opening at one side and this opening matches with the hole in the apparently beehive-like arranged ribo-nucleoprotein (RNP) strand which represents the innermost structure. A comparative study of a series of representative mammalian C-type viruses with the same technique indicated a close similarity to Friend virus in fine structure, although differences in stability were observed. Based on these and earlier findings a model of the structure of mammalian C-type viruses is presented. 
  Reference    Z. Naturforsch. 33c, 124 (1978); received January 9 1978 
  Published    1978 
  Keywords    75 Geburtstag gewidmet Ultrastructure, Mammalian C-Type Viruses, Friend Leukemia Virus 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0124.pdf 
 Identifier    ZNC-1978-33c-0124 
 Volume    33 
23Author    David Dvorak, Allan SnyderRequires cookie*
 Title    The Relationship between Visual Acuity and Illumination in the Fly, Lucilia sericata  
 Abstract    The variation in visual acuity with illumination has been studied by monitoring the extracellular response of direction sensitive motion detecting neurons to a drifting sine wave grating displayed upon an oscilloscope spreen. Acuity reaches a maximum value of 0.46 cycles/degree at luminances above 1.0 cd/m2 and decreases gradually over a 3.8 log unit attenuation in intensity to a minimum value of 0.05 cycles/degree. The results have been compared with theoretical acuity curves for the coupound eye with various dark adaptation mechanisms. The analysis indicates that a major strategy of dark adaptation in the fly is a process involving intensity-dependent neural summation of signals from photoreceptors having different visual axes. 
  Reference    Z. Naturforsch. 33c, 139 (1978); received November 9 1977 
  Published    1978 
  Keywords    Diptera, Insect, Vision, Visual Acuity, Electrophysiology 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0139.pdf 
 Identifier    ZNC-1978-33c-0139 
 Volume    33 
24Author    Arthur Koedam, MarionJ M GijbelsRequires cookie*
 Title    Isolation and Identification of 3-0ctanone in the Essential Oil of R o s m a r in u s o ffic in a lis L  
 Abstract    The essential oil of freshly distilled leaves of Rosmarinus officinalis L. was found to contain 3-octanone, a compound 
  Reference    Z. Naturforsch. 33c, 144 (1978); received October 20 1977 
  Published    1978 
  Keywords    Rosmarinus officinalis L, Labiatae, Rosemary, 3-Octanone, Monoterpene Hydrocarbons 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0144_n.pdf 
 Identifier    ZNC-1978-33c-0144_n 
 Volume    33 
25Author    JohnL. InghamRequires cookie*
 Title    Flavonoid and Isoflavonoid Compounds from Leaves of Sainfoin  
 Abstract    Phytoalexins The 5-deoxyisoflavones, afrormosin and formononetin have been isolated from healthy leaves of Onobrychis viciifolia. In addition to these compounds, several other flavonoid (iso-liquiritigenin; liquiritigenin; garbanzol) and isoflavonoid (medicarpin; vestitol) derivatives including the new iso-flavanone, vestitone (7,2'-dihydroxy-4'-methoxyisoflavanone), are present in leaves inoculated with the fungus Helmintho-sporium carbonum. 
  Reference    Z. Naturforsch. 33c, 146—148 (1978); received January 9 1978 
  Published    1978 
  Keywords    Leguminosae, Onobrychis, Isoflavonoids, Flavonoids 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0146_n.pdf 
 Identifier    ZNC-1978-33c-0146_n 
 Volume    33 
26Author    J. B. Stothers, A. Stoessl, E.W B WardRequires cookie*
 Title      
 Abstract    The mechanism of the biological hydroxylation of the isopropenyl side-chain of the sesquiterpene capsidiol, to give 13-hydroxycapsidiol, has been investigated with 13C-N M R techniques, using capsidiol biogenetically enriched with 13C from [l^-^CU] acetate. The results indicate that neither an allylic rearrangement nor the formation of an epoxide intervene in the process. 
  Reference    Z. Naturforsch. 33c, 149—150 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Biosynthesis, Capsidiol, 13C-NMR, Phytoalexins, Sesquiterpenes 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0149_n.pdf 
 Identifier    ZNC-1978-33c-0149_n 
 Volume    33 
27Author    Dorothee Petz, Friedhelm Schneider, Hans-Georg LöfflerRequires cookie*
 Title    Modellreaktionen zur kooperativen Amid/SH- Katalyse der Esterhydrolyse Model Reactions of the Concerted Amide-SH Catalysis of Ester Hydrolysis  
 Abstract    An enhancement of the rate of hydrolysis of certain methyl esters by cooperative effects of neighbouring amide and SH groups is demonstrated. The rate of hydroxyl ion catalyzed hydrolysis of the most reactive ester exceeds the rate of saponification of simple aliphatic esters by a factor of about 10s. A mechanism nf the saponification reactions involving intermediate cyclic imide formation is proposed. 
  Reference    Z. Naturforsch. 33c, 151—155 (1978); eingegangen am 3. Januar 1978 
  Published    1978 
  Keywords    Model Reactions, Ester Hydrolysis, Amid/SH-Catalysis 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0151_n.pdf 
 Identifier    ZNC-1978-33c-0151_n 
 Volume    33 
28Author    R. C. Hardie, P. DuelliRequires cookie*
 Title    Properties of Single Cells in Posterior Lateral Eyes of Jumping Spiders  
 Abstract    Properties of single cells in the posterior lateral (PL) eyes of the jum ping spider Plexippus validus are described. Only one spectral class of cells was encountered and the spectra sensitivity was indistinguishable from that measured from the ERG , both peaking at ca. 535 nm. Angular sensi­ tivity (width of angular sensitivity function at the 50% level) averaged .89° ± .12°, the smallest value being .77°. Absolute sensitivity (reciprocal of the number of quanta of peak wavelength, on axis required to generate a 50% response) averaged 1.43 + 2 .5 X 1 0 -11 q _ 1 ,cm2,s. A ll cells studied were sensitive to the plane of polarised light. The per­ formance of receptors in the PL eyes is compared with that of receptors in the compound eyes of diurnal insects. It is concluded that the single lens eye system of spiders is in ­ herently superior in design to the insect compound eye. 
  Reference    Z. Naturforsch. 33c, 156—158 (1978); received November 8 1977 
  Published    1978 
  Keywords    Jumping Spiders, Receptors, Spectral Sensitivity, Angular Sensitivity, Absolute Sensitivity 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0156_n.pdf 
 Identifier    ZNC-1978-33c-0156_n 
 Volume    33 
29Author    Stephan Bamberger, Günter Valet, Friedrich Storch, Gerhard Ruhenstroth-BauerRequires cookie*
 Title    Electromagnetically Induced Fluid Streaming as a Possible Mechanism of the Biomagnetic Orien­ tation of Organisms  
 Abstract    The results show that both the direction and the intensity of the geomagnetic field can be sensed within the chamber of a Zeiss Cytopherometer. This suggests that electro­ magnetically induced fluid streaming might play a role in the perception of the geomagnetic field by organisms, although it is not clear at present in which organ the per­ ception occurs. A basic requirement for such an organ would be an anisotropy of cells or cellular structures. The nervous system with its parallel axons, or specific cells associated with the nervous system, could thus be possible locations of the sensitivity towards magnetic fields. 
  Reference    Z. Naturforsch. 33c, 159—160 (1978); received November 24 1977 
  Published    1978 
  Keywords    Electric Field, Magnetic Earth Field, Suspended Particle, Magnetic, Sensitivity, Organism 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0159_n.pdf 
 Identifier    ZNC-1978-33c-0159_n 
 Volume    33 
30Author    Herbert Böhme, Peter BögerRequires cookie*
 Title    Dual-Wavelength Spectroscopy in Photosynthesis  
  Reference    Z. Naturforsch. 33c, 161 (1978); received March 13 1978 
  Published    1978 
  Keywords    Photosynthetic Electron Transport, Plastidic Cytochromes, Dual-Wavelength Spectroscopy, Cross-Over Experiments; Oxidation-Reduction Potentiometry 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0161.pdf 
 Identifier    ZNC-1978-33c-0161 
 Volume    33 
31Author    D. Adamiak, M. Noltemeyer, W. Saenger, F. SeelaRequires cookie*
 Title    X-Ray Structure of 2',3'-0-(2-Carboxyethyl)-ethylideneadenosine A Spacer Extended Ligand for Affinity Resins  
 Abstract    X-Ray Structure of 2',3'-0-(2-Carboxyethyl)-ethylideneadenosine, Absolute Configuration and Conformation of a Spacer Extended Affinity Ligand 
  Reference    Z. Naturforsch. 33c, 169 (1978); received February 2 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0169.pdf 
 Identifier    ZNC-1978-33c-0169 
 Volume    33 
32Author    W. CariusRequires cookie*
 Title    Streulichtmessungen an ebenen Lipidmembranen. Modulation des Streulichts durch eine elektrische Wechselspannung an der Membran Modulation of Light Scattering by an Electric Voltage at Planar Lipid Membranes  
 Abstract    Light scattered at a planar lipid membrane is modulated by an electric a. c. voltage across the membrane. This effect is studied by a schlieren optic method. It shows a large contribution from the bilayer/torus border. From the inner part of the membrane no modulation of scattered light was detectable. Membranes were made from egg lecithin + cholesterol/decane in 0.1 n KC1 aqueous solution. 
  Reference    Z. Naturforsch. 33c, 174 (1978); received March 6 1978 
  Published    1978 
  Keywords    Lipid Bilayer, Light Scattering, Voltage Dependent, Torus, Lenses 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0174.pdf 
 Identifier    ZNC-1978-33c-0174 
 Volume    33 
33Author    H.-R Schulten, R. Ziskoven, W. D. LehmannRequires cookie*
 Title    Cesium Determination in Physiological Fluids and Tissues by Field Desorption Mass Spectrometry+  
 Abstract    Quantitative ultratrace analysis (10 nmol to 10 /cmol/1) of cesium in biological samples such as human body fluids and animal tissues is performed without any prior purification or concentration steps. The normal level of cesium ions in heart cells was determined. After poisoning these cells with high concentrations of the alkali cation much higher levels were found inside the cells then had been suggested previously. It is demonstrated that field desorption mass spectrometry is a unique tool for the qualitative and quantitative investigations of metal cations in biological material. 
  Reference    Z. Naturforsch. 33c, 178 (1978); received February 20/March 8 1978 
  Published    1978 
  Keywords    Cesium, Ultratrace Determination, Biological Samples, Mass Spectrometry, Field Desorption 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0178.pdf 
 Identifier    ZNC-1978-33c-0178 
 Volume    33 
34Author    M. K. Gbordzoe, W. KreutzRequires cookie*
 Title    Determination of the Electron Density Profile of the Nerve Myelin Membrane in Different States Taking Paracrystalline Lattice Distortions into Account  
 Abstract    Recent investigations point to the presence of paracrystalline lattice disorder in the nerve myelin in the swollen, fixed and to some extent also in the native state. This leads to the distortion of the ^-function of the membrane stack and the @0-function of the unit cell, which can be ex­ perimentally isolated through swelling. Representing the distance statistics between neighbouring membranes and the electron density distribution of the single membrane with Gaussian functions, the (^-function can be expressed analytically as a convolution polynomial of the electron density, its mirror image and the distance statistics functions. Fitting this model (^-function to the experimental ^-function obtained by the inverse Fourier transformation of the scattered intensity, one can determine the optimal parameters of the electron density distribution and the distance statistics functions. The elimination of the distance fluctuations between neighbouring membranes permits the calculation of the undistorted 0-function or the ()0-function. The Fourier Analytical Deconvolution of the undistorted £>0-function enables a unique determination of the double membrane profile, thus a unique phase determination. 
  Reference    Z. Naturforsch. 33c, 184 (1978); received March 7 1978 
  Published    1978 
  Keywords    Biomembranes, Nerve Myelin, X-Ray Diffraction, ^-Function, Electron Density Profile 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0184.pdf 
 Identifier    ZNC-1978-33c-0184 
 Volume    33 
35Author    Vera Jakubick, Henry DelincéeRequires cookie*
 Title    Strahleninduzierte Aggregatbildung von Proteinen: Bindung von Aminosäuren an Myoglobin Radiation-Induced Aggregation of Proteins: Binding of Amino Acids to Myoglobin  
 Abstract    When myoglobin is irradiated in the presence of amino acids, the most radiation-reactive species, like the aromatic and sulfur-containing amino acids, will bind preferentially to the protein. The radiation-induced binding is strongly dependent on the concentration of protein and amino acid. Subsequent to irradiation of myoglobin in the presence of radioactively labelled tryptophan followed by tryptic hydrolysis, only a single radioactive spot was detected on the fingerprint. The binding of amino acids is thus not randomly distributed over the protein molecule but occurs at specific reactive sites. 
  Reference    Z. Naturforsch. 33c, 203—209 (1978); eingegangen am 23. September 1977/27. Januar 1978 
  Published    1978 
  Keywords    Irradiation, Protein Aggregation, Myoglobin, Amino Acids, Specific Binding 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0203.pdf 
 Identifier    ZNC-1978-33c-0203 
 Volume    33 
36Author    Georg SchmettererRequires cookie*
 Title    ATP Dependent Uptake of Zinc by Human Erythrocyte Ghosts  
 Abstract    The energy dependence of Zn2+ accumulation by human erythrocytes was studied by preparing resealed ghosts loaded with ATP or AMP. Uptake of Zn2+ was followed by radioactivity or atomic absorption spectroscopy measurements. Zn2+ taken up is not adsorbed by the mem­ brane but transported into the ghosts. Ghosts containing ATP took up more Zn2+ than those con­ taining AMP. The effect is not specific for ATP, however, GTP and CTP showing the same in­ creased uptake. Zn2+ uptake by ATP ghosts can be further drastically enhanced by addition of Cu2+ . Therefore, in spite of the enhancement of Zn2+ uptake by ATP, Zn2+ seems to be accumulated by a passive mechanism even when the ghosts contain ATP. The accumulation is probably brought about by binding of Zn2+ to substances inside the ghosts. 
  Reference    Z. Naturforsch. 33c, 210 (1978); received January 23/February 16 1978 
  Published    1978 
  Keywords    Zinc Accumulation, Zinc Transport, ATP Dependent Transport, Erythrocyte Ghosts 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0210.pdf 
 Identifier    ZNC-1978-33c-0210 
 Volume    33 
37Author    Francisco Bertini, M.Eduardo Otta, Mercedes ConzalezRequires cookie*
 Title    Isopycnic Equilibrium of Mouse Liver [131I]Albumin Digesting Particles in Sucrose Gradients  
 Abstract    The isopycnic equilibrium of [131J] albumin digesting particles from mouse liver homogenates occurs, in a sucrose gradient, at a density 1.25, and it does not change with time after albumin injection (5 to 300 minutes). 
  Reference    Z. Naturforsch. 33c, 216 (1978); received December 30 1977 
  Published    1978 
  Keywords    Lysosomes, Digestive Vacuoles, Intracellular Hydrolysis 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0216.pdf 
 Identifier    ZNC-1978-33c-0216 
 Volume    33 
38Author    R. Strasser, M. VolmRequires cookie*
 Title    Untersuchungen über spezifische Einflüsse des Serums und Lebercytoplasmas auf den [3H]TTP-Einbau isolierter Leberzellkerne Studies on the Specific Effects of Serum and Cytoplasm of the Liver on the [3H]TTP-Incorporation of Isolated Liver Nuclei  
 Abstract    Previous authors have described that liver cytoplasm and serum from partially hepatectomized rats stimulate the DNA synthesis of isolated nuclei of liver cells. The aim of our investigation was to prove whether such stimulating effects are part of a specific regulation of growth. The sera and the cytoplasm supernatant 105 000 Xg) were isolated at several intervals after partial hepatectomy and laparotomy and were tested on isolated nuclei of liver cells from adult rats partially hepatectomized 20 hours before. The supernatants isolated at 8 and 16 hours after both partial hepatectomy and laparotomy have a significant stimulatory effect on the [3H]TTP-uptake by nuclei. The presence of serum (10%) causes a general elevation (75%) of the [3H]TTP-uptake by isolated nuclei. The sera isolated 4 to 12 hours after operation from both partially hepatectomized and laparotomized rats have an additional stimulatory effect on the [3H] TTP-uptake synthes of nuclei. In no case did the sera and liver cytoplasm of partially hepatectomized rats have a significantly different and therefore "specific" effect on the nuclear DNA synthesis. Additional experiments showed that frozen and thawed nuclei of liver cells respond only to the nutritive power but not to the stimulatory effects of the sera. Thus, thawed nuclei cannot be used for growth investigations. 
  Reference    Z. Naturforsch. 33c, 219 (1978); eingegangen am 5. September 1977/25. Januar 1978 
  Published    1978 
  Keywords    Isolated Liver Nuclei, Partial Hepatectomy, [3H] TTP-Incorporation, Serum, Cytoplasm 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0219.pdf 
 Identifier    ZNC-1978-33c-0219 
 Volume    33 
39Author    Reiner Merz, Monika Löffler, Friedhelm SchneiderRequires cookie*
 Title    Further Investigations on the /?-Nitrophenylphosphatase Activity of Intact Ehrlich Ascites Tumor Cells  
 Abstract    The substrate specificity and the effects of nucleotides and SH-blocking agents on the p-nitro-phenylphosphatase activity of intact Ehrlich ascites tumor cells (EAT) cells were studied. DL-ß-Glycerophosphate, o-phosphoethanolamine, cholinephosphate, glucose-6-phosphate, o-carboxyphenyl-phosphate,, phosphoenolpyruvate and AMP were not attacked by intact cells. ATP > GTP > UTP > PPj > pNPP were cleaved with decreasing velocity. A stimulation of the cleavage of p-NPP by the following nucleotides was observed with decreasing effectivity: ATP > ADP > GTP > UTP; AMP was ineffective. The phosphatase activity was not affected by malate, tartrate and glutathion disulfide. The SH blocking agents diamide and thimerosal were more effective in­ hibitors of the pNPPase than of the ATPase activity, whereas the hydrolysis of ATP is more affected by the ATP analog adenylylimidodiphosphate. The present data are best compatible with a double headed enzyme: Both active sites interact with ATP, only one is active against p-NPP and sensitive against SH-blocking agents. 
  Reference    Z. Naturforsch. 33c, 227 (1978); received January 23 1978 
  Published    1978 
  Keywords    Phosphatase Activity, Ehrlich Ascites Tumor Cells, SH Blocking Agents 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0227.pdf 
 Identifier    ZNC-1978-33c-0227 
 Volume    33 
40Author    Karlfriedrich Hofmann, Martina Günderoth-Palmowski, Gottfried Wiedenmann, Wolfgang EngelmannRequires cookie*
 Title    Further Evidence for Period Lengthening Effect of L i+ on Circadian Rhythms  
 Abstract    The period length of the activity rhythm of the cockroach Leucophaea maderae is increased by a LiCl solution of 100 mol m—3 offered as drinking water by about 1%. 
  Reference    Z. Naturforsch. 33c, 231 (1978); received February 2. 1978 
  Published    1978 
  Keywords    Circadian Rhythm, Activity, Li, Leucophaea maderae, Mesocricetus auratus 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0231.pdf 
 Identifier    ZNC-1978-33c-0231 
 Volume    33 
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