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1988 (156)
1Author    Hans Geiger, Siegbert Anhut, H.Dietmar ZinsmeisterRequires cookie*
 Title    Biflavones from Some Mosses  
 Abstract    Antitrichia curtipendula, Hylocomium splendens, Racomitrium lanuginosum, Plagiomnium elatum, Biflavones, 5'-Hydroxyamentoflavone From Antitrichia curtipendula and Racomitrium lanuginosum 5',3"'-dihydroxyrobustaflavone and 5', 8"-biluteolin were isolated. In Plagiomnium elatum the new biflavone 5'-hydroxyamento-flavone was detected. 
  Reference    Z. Naturforsch. 43c, 1 (1988); received August 24 1987 
  Published    1988 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0001.pdf 
 Identifier    ZNC-1988-43c-0001 
 Volume    43 
2Author    JohnL. Ingham, Satoshi Tahara, StanleyZ. DziedzicRequires cookie*
 Title    Coumestans from the Roots of Puer aria mirifica  
 Abstract    Three isoflavonoids obtained from a methanolic extract of Pueraria mirifica roots have been identified as 3,9-dihydroxy-8-methoxy-7-(3,3-dimethylallyl)-coumestan (mirificoumestan), 3,9-di-hydroxy-8-methoxy-7-(3-hydroxy-3-methylbutyl)-coumestan (mirificoumestan hydrate), and 3,9-dihydroxy-8-methoxy-7-(2,3-dihydroxy-3-methylbutyl)-coumestan (mirificoumestan glycol). These new coumestans co-occur with coumestrol (3,9-dihydroxycoumestan), a compound already found in P. mirifica roots. 
  Reference    Z. Naturforsch. 43c, 5—10 (1988); received September 7 1987 
  Published    1988 
  Keywords    Leguminosae, Pueraria, Isoflavonoids, Coumestans, Coumestrol 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0005.pdf 
 Identifier    ZNC-1988-43c-0005 
 Volume    43 
3Author    Eckard Klose, ArminR. GemmrichRequires cookie*
 Title    In vivo Synthesis of [ 14 C]Dilinoylgalactosylglycerol by Gametophytes of the Fern Anemia phyllitidis  
 Abstract    Blue light-grown gametophytes of Anemia phyllitidis were used for the in vivo synthesis of radioactively labeled dilinoylgalactosylglycerol, a potential intermediate in the synthesis of linolenic acid. Optimal yield was obtained by incubating gametophytes with [ 14 C]linoleate first for 2 h under anaerobic conditions followed by 46 h under aerobic conditions. As product [ 14 C]dilinoylgalactosylglycerol was identified. 
  Reference    Z. Naturforsch. 43c, 11—14 (1988); received November 2 1987 
  Published    1988 
  Keywords    Desaturation, Linoleate, Linolenate, Monogalactosyldiacylglycerol, Fatty Acid Synthesis 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0011.pdf 
 Identifier    ZNC-1988-43c-0011 
 Volume    43 
4Author    SamirS. Radwan, Adel-Salam Shaaban, HassanM. GebreelRequires cookie*
 Title    Arachidonic Acid in the Lipids of Marine Algae Maintained under Blue, White and Red Light  
 Abstract    Marine algae, maintained for one month under blue, white and red light were rather rich in lipids but obviously poor in fat (triacylglycerols). These lipids consisted predominantly of glyco-lipids and phospholipids. Irrespective of the light quality, the major constituent fatty acids in lipids of these algae were, in most cases, those with 20 carbon atoms. The light quality had a definite effect on the proportion of arachidonic acid in the lipids of certain algae. Thus, the proportion of arachidonic acid in Enteromorpha intestinalis maintained under white light was 45% and in Sargassum salicifolium kept under red light 25% of the total constituent fatty acids in the total algal lipids. 
  Reference    Z. Naturforsch. 43c, 15—18 (1988); received March 26/September 18. 1987 
  Published    1988 
  Keywords    Arachidonic Acid, Light Quality, Marine Algae, Prostaglandins 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0015.pdf 
 Identifier    ZNC-1988-43c-0015 
 Volume    43 
5Author    Paul-Gerhard Gülz, Jutta Bodden, Edith Müller, Franz-Josef MarnerRequires cookie*
 Title    Epicuticular Wax of Euphorbia aphylla Brouss. ex. Willd., Euphorbiaceae  
 Abstract    Quantity and composition of epicuticular wax of Euphorbia aphylla were examined. The wax contained the common lipid components «-alkanes, wax esters, pr. alcohols, fatty acids and in traces aldehydes and acetates all occurring in homologous series. Additionally, several triter-penols such as ß-amyrin, a-amyrin, lupeol and simiarenol were found. With the exception of simiarenol these triterpenols occurred free as well as esterified with acetic acid and fatty acids. The ketones, oleanen-3-one, ursen-3-one and lupen-3-one have also been identified. 
  Reference    Z. Naturforsch. 43c, 19—23 (1988); received September 8/October 8 1987 
  Published    1988 
  Keywords    aphylla, Epicuticular Wax Composition, Triterpenols, Triterpenones, Triterpenol Esters 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0019.pdf 
 Identifier    ZNC-1988-43c-0019 
 Volume    43 
6Author    Wolf-Rainer Abraham, Hans-Peter Hanssen, Claudius MöhringerRequires cookie*
 Title    Novel Sesquiterpene Ethers from Liquid Cultures of the Wood-Rotting Fungus Lentinus lepideus  
 Abstract    The brown-rot fungus Lentinus lepideus (Fr.: Fr.) Fr. FPRL 7B (Basidiomycotina) was culti-vated on a defined synthetic liquid medium containing glucose (2%), isoleucine (0.15%), and mineral salts for 105 days. The steam distillate was separated by column chromatography. Three novel sesquiterpene ethers with muurolane skeleton (lentideusether, isolentideusether, and 10-hydroxylentideusether) were isolated and their structures elucidated by spectroscopic methods, in particular by 'H NMR spectra and by two-dimensional 'H/'H-and 13 C/'H-chemical shift correlation. These compounds are described for the first time as natural products. As a further metabolite, the acyclic sesquiterpene alcohol terrestrol was identified. 
  Reference    Z. Naturforsch. 43c, 24—28 (1988); received August 18/October 30 1987 
  Published    1988 
  Keywords    Lentinus lepideus, Lentideusether, Terrestrol, Fungal Sesquiterpenes, Fungal Fragrance Compounds 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0024.pdf 
 Identifier    ZNC-1988-43c-0024 
 Volume    43 
7Author    Hans-Dieter Knöfel, Dieter GrossRequires cookie*
 Title    Synthesis of Racemic [2-14 C]Jasmonic Acid  
 Abstract    (±)-[2-14 C]Jasmonic Acid, Plant Growth Regulator (±)-[2-l4 C)Jasmonic acid has been synthesized in nearly 50% yield via the route of the Michael addition starting from 2-(2Z-pentenyl)-2-cyclopenten-l-one and diethyl [2-14 C]malonate followed by saponification and decarboxylation of the Michael products in one step. 
  Reference    Z. Naturforsch. 43c, 29—31 (1988); received August 3 1987 
  Published    1988 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0029.pdf 
 Identifier    ZNC-1988-43c-0029 
 Volume    43 
8Author    Dieter Strack, Wiltrud Gross, Jürgen Heilemann, Harald Keller, Sabine OhmRequires cookie*
 Title    Enzymic Synthesis of Hydroxycinnamic Acid Esters of Glucaric Acid and Hydroaromatic Acids from the Respective l-O-Hydroxycinnamoylglucoside and Hydroxycinnamoyl-Coenzyme A Thioester as Acyldonors with a Protein Preparation from Cestrum elegáns Leaves  
 Abstract    Hydroxycinnamoyltransferase activities which catalyze the formation of O-hydroxycinnamoyl-(p-coumaroyl-, feruloyl-, and sinapoyl-)-glucaric acids via the corresponding 1-O-hydroxycin-namoyl-ß-glucoses, and 0-(p-coumaroyl)-quinic acid and 0-(p-coumaroyl)-shikimic acid both via p-coumaroyl-CoA thioester have been isolated from leaves of Cestrum elegáns D. F. L. v. Schlechtendal. The enzymic activities involved could be classified as 1-O-hydroxycinnamoyl-ß-glucose : glucaric acid hydroxycinnamoyltransferase (EC 2.3.1.-) and /?-coumaroyl-CoA : quinic acid/shikimic acid hydroxycinnamoyltransferase (EC 2.3.1. —). This is the first time that both the O-glucoside-and the S-CoA-dependent activities in phenolic acid-ester formation were found to be present in the same plant. 
  Reference    Z. Naturforsch. 43c, 32—36 (1988); received August 25 1987 
  Published    1988 
  Keywords    Acyltransferase, Hydroxycinnamic Acid Conjugates, Glucaric Acid Ester, Quinic Acid Ester, Shikimic Acid Ester 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0032.pdf 
 Identifier    ZNC-1988-43c-0032 
 Volume    43 
9Author    Dieter Strack, Jürgen Heilemann, Eva-Susan Klinkott, Victor WrayRequires cookie*
 Title    Cell Wall-Bound Phenolics from Norway Spruce (Picea abies) Needles  
 Abstract    Insoluble phenolics have been isolated and identified from Norway spruce (Picea abies [L.] KARST.) needles as cell wall-bound astragalin (kaempferol 3-O-ß-glucoside) and p-coumaric acid as major components, and ferulic acid as a minor one. They probably mainly occur as lignin-carbohydrate complexes. 
  Reference    Z. Naturforsch. 43c, 37—41 (1988); received August 25 1987 
  Published    1988 
  Keywords    Picea abies (L) KARST, Hydroxycinnamic Acids, Flavonols, Cell Wall, Localization 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0037.pdf 
 Identifier    ZNC-1988-43c-0037 
 Volume    43 
10Author    Jürgen Reichling, Rainer Martin, Ulla ThronRequires cookie*
 Title    Production and Accumulation of Phenylpropanoids in Tissue and Organ Cultures of Pimpinella anisum  
 Abstract    A leaf-differentiating callus culture and a root organ culture of Pimpinella anisum have been established in liquid nutrition medium. Their behaviour in accumulation of phenylpropanoids was shown to be different from that of the entire plant. This makes them, together with their special growth behaviour, suitable for labelling experiments with the biosynthesis of pseudoisoeugenols. 
  Reference    Z. Naturforsch. 43c, 42—46 (1988); received July 28/September 22 1987 
  Published    1988 
  Keywords    Pimpinella anisum, Umbelliferae, Tissue and Organ Cultures, Phenylpropanoids, Pseudoiso-eugenols 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0042.pdf 
 Identifier    ZNC-1988-43c-0042 
 Volume    43 
11Author    Klaus Kobek, Manfred Focke, HartmutK. LichtenthalerRequires cookie*
 Title    Fatty-Acid Biosynthesis and Acetyl-CoA Carboxylase as a Target of Diclofop, Fenoxaprop and other Aryloxy-phenoxy-propionic Acid Herbicides  
 Abstract    The effect of the herbicides and aryloxy-phenoxy-propionic acid derivatives diclofop, fenoxa-prop, fluazifop and haloxyfop and their ethyl, methyl or butyl esters on the de novo fatty-acid biosynthesis of isolated chloroplasts was investigated with intact chloroplasts isolated from sensi-tive grasses (Poaceae) and tolerant dicotyledonous plants (Pisum, Spinacia). The 4 herbicides (free-acid form) block the de novo fatty-acid biosynthesis ([2-l4 C]acetate incorporation into the total fatty-acid fraction) of the sensitive Avena chloroplasts in a dose-dependent manner. The / 50 -values (a 50% inhibition of the [ 14 C]acetate incorporation) lie in the range of 10~ 7 to 2 x 10~ 6 M. The ethyl or methyl esters (diclofop, fenoxaprop, haloxyfop) and butyl ester (fluazifop) do not affect the de novo fatty-acid biosynthesis of isolated chloroplasts or only at a very high concentra-tion of ca. 10" 4 M. In contrast, the de novo fatty-acid biosynthesis of the tolerant dicotyledonous species (pea, spinach) is not affected by the 4 aryloxy-phenoxy-propionic acid herbicides. In an enzyme preparation isolated from chloroplasts of the herbicide-sensitive barley plants the de novo fatty-acid biosynthesis from [ 14 C]acetate and [ 14 C]acetyl-CoA is blocked by all 4 herbi-cides (free acids), whereas that of [ l4 C]malonate and [ I4 C]malonyl-CoA is not affected. This strongly suggests that the target of all 4 herbicides (free-acid form) is the acetyl-CoA carboxylase within the chloroplasts. The applied ester derivatives, in turn, which are ineffective in the isolated chloroplast test system, have equally little or no effect on the activity of the acetyl-CoA carboxyl-ase. It is assumed that the acetyl-CoA carboxylase of the tolerant dicot plants investigated is modified in such a way that the 4 herbicides cannot bind to and affect the target. 
  Reference    Z. Naturforsch. 43c, 47—54 (1988); received November 2 1987 
  Published    1988 
  Keywords    Acetyl-CoA Carboxylase, Chloroplast Metabolism, de novo Fatty-Acid Biosynthesis, Fluazifop, Haloxyfop, Herbicide Sensitivity 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0047.pdf 
 Identifier    ZNC-1988-43c-0047 
 Volume    43 
12Author    S. Schneider, P. Geiselhart, S. Siebzehnrübl, R. Fischer, H. ScheerRequires cookie*
 Title    Energy Transfer within PC Trimers of Mastigocladus laminosus Studied by Picosecond Time-Resolved Transient Absorption Spectroscopy  
 Abstract    The transient absorption recovery induced in phycocyanin trimers by picosecond pulses of variable wavelength (570—620 nm) has been recorded and analyzed by applying a least-squares multi-exponential fit procedure. The results suggest that in native PC trimers the chromophores exhibit a microheterogeneity with the effect that the derived apparent lifetimes are functions of excitation and probing wave-length. It is suggested that, due to strong excitonic coupling between a-84 and ß-84 chromophores, the lifetime of the terminal acceptor state is reduced to about 900 ps; the apparent energy transfer time from chromophore ß-155 to a-84 and ß-84 chromophores varies between 20—50 ps depending on the actual chromophore-protein arrangement (microheterogeneity). 
  Reference    Z. Naturforsch. 43c, 55—62 (1988); received July 2/October 12 1987 
  Published    1988 
  Keywords    Energy Transfer, Phycocyanin Trimer, Excited State Lifetimes, Transient Absorption Recovery 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0055.pdf 
 Identifier    ZNC-1988-43c-0055 
 Volume    43 
13Author    PetraH. Eilfeld, Gabriele Widerer, Heike Malinowski, Wolfhart Rüdiger, PeterG. EilfeldRequires cookie*
 Title    Topography of the Phytochrome Molecule as Determined from Chemical Modification of SH-Groups  
 Abstract    124 kDa phytochrome has been isolated from etiolated oat seedlings. Specific chemical modifi-cation of SH-groups has been performed using several agents, especially mercurials. These proce-dures allowed covalent fluorescence labelling of phytochrome. Bleaching of the tetrapyrrole chromophore and reduced photoreversibility has been investigated and analyzed in terms of steric effects, i.e. size of the reagents and number of modified residues. The Pr form was found to exhibit two highly reactive SH-groups, the Pfr form three, however. Two highly reactive groups have been localized on the 55 kDa C-terminal half of the protein. The 3rd group predominantly reacting in the Pfr form has been localized on a 39 kDa chromopeptide, i.e. on the N-terminal half. The covalently attached fluoresceine chromophores were used as reporter groups. The envi-ronment of the fluoresceine chromophore is more hydrophobic in the Pfr form than in the Pr form, indicating that conformational changes take place during photoconversion. 
  Reference    Z. Naturforsch. 43c, 63—73 (1988); received August 31 1987 
  Published    1988 
  Keywords    Oat, Avena sativa L, Mercurials, 124 kDa Phytochrome, Reporter Group 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0063.pdf 
 Identifier    ZNC-1988-43c-0063 
 Volume    43 
14Author    F.C M Driessens, R.M H Verbeeck, J.W E Van Dijk, J.M P M BorggrevenRequires cookie*
 Title    Degree of Saturation of Blood Plasma in Vertebrates with Octocalcium Phosphate  
 Abstract    In previous papers it has been shown that octocalcium phospate OCP occurs in bone mineral of vertebrates. Although this compound is not stable, there is a continuous new-formation of OCP due to bone turnover. Literature data of the calcium and phosphate concentrations in the blood plasma of vertebrates were collected and the degree of saturation with OCP was calculated. The results show that blood plasma of vertebrates is almost saturated with OCP. This fact indicates that OCP is the solubility controlling phase in the mineral of vertebrates. Further it verifies the expectation based on physicochemical theory that the interaction between body fluids and bone mineral is important in the calcium and phosphate homeostasis. 
  Reference    Z. Naturforsch. 43c, 74—76 (1988); received April 23/November 2 1987 
  Published    1988 
  Keywords    Calcium Homeostasis, Phosphate Homeostasis, Vertebrates 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0074.pdf 
 Identifier    ZNC-1988-43c-0074 
 Volume    43 
15Author    Iwan Bissig, RenéA. Brunisholz, Franz Suter, RichardJ. Cogdell, Herbert ZuberRequires cookie*
 Title    The Complete Amino Acid Sequences of the B 800—850 Antenna Polypeptides from Rhodopseudomonas acidophila strain 7750  
 Abstract    Spectrally pure B 800—850 light harvesting complexes of Rhodopseudomonas acidophila 7750 were prepared by chromatography of LDAO-solubilised photosynthetic membranes on What-mann DE-52 ion exchange resin. Two low molecular mass polypeptides (a, ß) have been isolated by organic solvent extraction of the lyophilised B 800—850 light harvesting complexes. Their primary structures were determined by liquid phase sequencer runs, by the sequence analyses of C-terminal o-iodosobenzoic acid fragments, by hydrazinolysis and by carboxypeptidase degrada-tion. B800—850-a consists of 53 amino acids and is 45.3% and 50.9% homologous to the B 800-850-a antenna polypeptides of Rhodobacter sphaeroides and Rhodobacter capsulatus, respectively. The second very short polypeptide (B800—850-ß, 41 amino acids) is 61.0% and 56.1% homolo-gous to the corresponding polypeptides of Rb. sphaeroides and Rb. capsulatus. The molar ratio of the two polypeptides is about 1:1. Both polypeptides show a hydrophilic N-terminal domain, a very hydrophobic central domain and a short C-terminal domain. In both polypeptides the typical His residues, identified in all antenna polypeptides of purple nonsulphur bacteria as possible bacteriochlorophyll binding sites, were found. 
  Reference    Z. Naturforsch. 43c, 77—83 (1988); received October 21 1987 
  Published    1988 
  Keywords    B800—850 Antenna Complex, Light-Harvesting Polypeptide, Purple Nonsulfur Bacterium, Amino Acid Sequence, Rhodopseudomonas acidophila 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0077.pdf 
 Identifier    ZNC-1988-43c-0077 
 Volume    43 
16Author    Hugo Scheer, Hartmut KayserRequires cookie*
 Title    Conformational Studies of Biliproteins from the Insects Pieris brassicae and Cerura vinula  
 Abstract    Chromophore conformation and protein secondary structure of biliproteins from the butterfly, Pieris brassicae, and the moth, Cerura vinula, have been investigated by absorption, circular dichroism and fluorescence spectroscopy. The chromophore of the P. brassicae protein, biliverdin IXy, has probably a cyclic-helical structure similar to that of free bile pigments of the biliverdin type. Though achiral by structure the chromophore displays strong optical activity in the native protein-bound state, but becomes inactive after urea denaturation of the protein. A minor bilipro-tein from P. brassicae shows absorption, circular dichroism and fluorescence spectra identical to the main biliprotein. In the biliprotein from Cerura vinula the structure of the pigment is still unknown. It has a semi-open conformation intermediate between that of the Pieris proteins and that of the phycobiliprotein, C-phycocyanin, and it retains optical activity after urea denaturation. The band widths and the size of the Stokes shifts of the fluorescence spectra indicate a high degree of conformational flexibility of the chromophores in the two Pieris pigments, and a decreased flexibility in the one from Cerura. In the biliproteins from both insects the polypeptides are low in a-helix content compared to that of phycobiliproteins. From these and earlier data, insect and algal biliproteins seem to be related only distantly if at all, but there exist also considerable differences among insect biliproteins from different species. 
  Reference    Z. Naturforsch. 43c, 84—90 (1988); received August 26 1987 
  Published    1988 
  Keywords    Biliverdin IXy, Chromophore Conformation, Phycocyanin, Pieris brassicae, Cerura vinula 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0084.pdf 
 Identifier    ZNC-1988-43c-0084 
 Volume    43 
17Author    W. Bujalowski, D. PorschkeRequires cookie*
 Title    Selective Binding of Amino Acid Residues to tRNA Molecules Detected by Anticodon-Anticodon Interactions  
 Abstract    Anticodon-anticodon pairing of complementary tRNA's has been studied by fluorescence tem-perature jump measurements in the presence of different ligands as an approach for the evalua-tion of ligand binding to tRNA. This procedure is particularly useful for ligands which do not show spectroscopic changes upon binding, but affect the pairing potential of anticodons. Addition of phenylalanine-, tyrosine-and tryptophan-amide leads to a substantial decrease of the tRNA Phe -tRNA Glu pairing constant K p , whereas K p remains almost unaffected by addition of leucine amide and increases upon addition of glycine amide. The effects observed for the aromatic amino acid amides can be described quantitatively by a site binding model with preferential binding of the amides to tRNA Phe . The binding constants evaluated according to this model (Phe-amide 120 M" 1 , Tyr-amide 160 M" 1 and Trp-amide 580 M~') are consistent with values obtained independently by fluorescence titrations with tRNA Phe . Selective binding of these amino acid residues to tRNA Phe is deduced from the observed concentration dependence, which is not com-patible with a corresponding binding process to tRNA Glu . Addition of glutamic acid diamide induces an increase of the tRN A Phe • tRNA Glu pairing constant, which is however equivalent to that observed for tRNA Phe -tRNA Lys pairing and thus does not demonstrate a selective binding to tRNA° lu . The pairing of tRNA Phe with tRNA Glu is strongly enhanced by addition of Mg 2+ or spermine. Evaluation of the Mg 2+ data by a site model leads to constants of 360 M~' for the binding of Mg 2+ to monomer tRNA and 3000 M" 1 for the binding of Mg 2+ to the tRNA Phe -tRNA Glu dimer. A comparison of the enhanced pairing observed in the presence of Mg 2+ , which is known to induce a 3'-stack conformation of the anticodon loop, with the reduced pairing affinity observed in the presence of aromatic amino acid amides suggests induction of a 5'-stack confor-mation by the latter ligands. 
  Reference    Z. Naturforsch. 43c, 91—98 (1988); received July 14 1987 
  Published    1988 
  Keywords    tRNA, Amino Acid Residues, Anticodon Binding, Protein Nucleic Acid Interactions, Fluores-cence Temperature Jump 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0091.pdf 
 Identifier    ZNC-1988-43c-0091 
 Volume    43 
18Author    S. Schulz, W. Francke, J. Edgar, D. SchneiderRequires cookie*
 Title    Volatile Compounds from Androconial Organs of Danaine and Ithomiine Butterflies  
 Abstract    Pyrrolizidine alkaloid derivatives are present in the androconial (male scent) organs of Prittwit-zia hymenaea, Mechanitis isthmia veritabilis, Tithorea harmónia fúria (Lep., Ithomiinae), Amauris echeria and Euploea sylvester (Lep., Danainae). While the ithomiines contain the new pyrrolizidine alkaloid derivative methyl hydroxydanaidoate, the danaines contain the known derivatives danaidone and hydroxydanaidal. In addition, 2,2,6-trimethyl-2-cyclohexen-l,4-dione (oxoisophorone) and related terpenoids have been identified from Amauris, Euploea and Prittwit-zia as well as from the flowers of Buddleja davidii (Loganiaceae). Three new naturally occurring bishomoterpenes as well as mono-and sesquiterpenes and aromatic compounds add to the forma-tion of species specific blends in the scent organs of the butterflies. 
  Reference    Z. Naturforsch. 43c, 99—104 (1988); received July 29 1987 
  Published    1988 
  Keywords    Pyrrolizidine Alkaloids, Oxoisophorone, Bishomoterpenes, Butterfly-Pheromones, Danaines and Ithomiines, Buddleja Flowers 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0099.pdf 
 Identifier    ZNC-1988-43c-0099 
 Volume    43 
19Author    Peter Kunze, Hans-Ulrich WezsteinRequires cookie*
 Title    Apomorphine and Haloperidol Influence Electric Behaviour of a Mormyrid Fish  
 Abstract    The electric behaviour of the mormyrid Gnathonemus petersii is changed by dopaminergic drugs applied to the aquarium water. The upper limit of the interpuis interval distributions is significantly shifted to shorter intervals by apomorphine-HCl (.082-,328 mg/ml), and to longer intervals by haloperidol (.041 —.164 mg/ml). The effect of apomorphine is antagonized by haloperidol. Probably, a dopamin system is involved in the neural control of the electric organ. 
  Reference    Z. Naturforsch. 43c, 105—107 (1988); received October 5 1987 
  Published    1988 
  Keywords    Apomorphine, Haloperidol, Dopamin, Electric Behaviour, Gnathonemus 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0105.pdf 
 Identifier    ZNC-1988-43c-0105 
 Volume    43 
20Author    Gerd GädeRequires cookie*
 Title    On the Release and Action of the Hypertrehalosaemic Hormone from the Cockroach Nauphoeta cinerea  
 Abstract    The corpora cardiaca of the cockroach Nauphoeta cinerea contain a hypertrehalosaemic hor-mone (HTH) which is chemically characterized as a blocked decapeptide. The synthetic HTH shows the same chromatographic behaviour as the material isolated from corpora cardiaca. The synthetic peptide causes hypertrehalosaemia and fat body glycogen phosphorylase-activation in N. cinerea as well as in the American cockroach, Periplaneta americana in a dose-dependent fashion. It is calculated that one gland from N. cinerea stores about 50 pmol of HTH. Roughly 10% of the total available hormone in the gland is released in vitro during exposure to an elevated potassium saline which causes depolarization of the neurosecretory cells. 
  Reference    Z. Naturforsch. 43c, 108—116 (1988); received July 22/September 21 1987 
  Published    1988 
  Keywords    Synthetic Hypertrehalosaemic Hormone, Nauphoeta cinerea, Activation of Fat Body Glycogen Phosphorylase, Increase of Blood Carbohydrates Release of Hypertrehalosaemic Hormone 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0108.pdf 
 Identifier    ZNC-1988-43c-0108 
 Volume    43 
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