Published by De Gruyter

Volume 26 Issue 10

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

Open Access June 2, 2014

Über die Darstellung von Derivaten des S₄N₃Cl / The Preparation of S₄N₃Cl Derivatives

Herbert W. Roesky, Michael Dietl

Page range: 977-978

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Abstract

S 4 N 3 Cl reacts with sulfonic acids and imido- bissulfonyl derivatives under HCl-evolution to the following compounds: S 4 N 3 SO 3 CF 3 , S 4 N 3 N (SO 2 F) 2 , S 4 NSO 3 CH 3 HSO 3 CH 3 , S 4 N 3 N (SO 2 CF 3 ) SO 2 Cl and S 4 N 3 N (SO 2 CF 3 ) SO 2 F, They are yellow solids which decompose when heated below the melting point. The compounds are formed in nearly quantitative yield and have been characterized by elemental analysis, nmr and electronic spectra.

Open Access June 2, 2014

Phosphinimino-phosphine durch Entsilylierung von N-Silyl-phosphiniminen / Phosphinimino-phosphines by Desilylation of N-silyl-phosphinimines

Werner Wolfsberger, Hans H. Pickel, Hubert Schmidbaur

Page range: 979-981

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Abstract

Desilylation reactions of N-trimethylsilyl-trimethyl-phosphinimine (1) with PCl 3 and CH 3 PCl 2 lead to the formerly unknown phosphinimino-phosphines 2 and 3, which are characterized by elemental analysis, molecular weights, and 1 H- and 31 P-nmr spectra. The action of (CH 3 ) 2 PCl on N-trimethylsilyl compounds does not afford the expected desilylated products (4, 6). Instead a second mole of (CH 3 ) 2 PCl is added immediately to yield the ionic species 5 and 7.

Open Access June 2, 2014

Chemische Verschiebungen der ³¹P-Kernresonanz-Multipletts von Tetraphosphortrisulfid in einigen Lösungsmitteln / Chemical Shifts of the ³¹P-NMR-Multiplets of Tetraphosphorus Trisulfide in Some Solvents

Gernot Heckmann, Ekkehard Fluck

Page range: 982-986

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Abstract

The N.M.R. spectrum of tetraphosphorus trisulfide was investigated in various solvents. The observed variations of the chemical shift of the P 4 S 3 multiplets, which can be as large as 34.5 ppm, are caused mainly by dispersion interactions. Here the interaction of the directly bonded phosphorus atoms of the P 4 S 3 molecule is as large as with dissolved white phosphorus. No variation of coupling constant J PSP with the various solvents could be observed; this coupling constant was found to be 71 ± 1 Hz. Further the solubility of P 4 S 3 in some solvents is given.

Open Access June 2, 2014

Die Kristallstruktur von Di-μ-hydroxo-bis[aquotriamminkobalt(III)]-nitrat-2-Hydrat / The Crystal Structure of Di-μ-hydroxo-bis[aquotriamminecobalt (III)] - nitrate-2-hydrate

Karl Wieghardt

Page range: 987-989

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Abstract

The crystal structure of Di-µ-hydroxy-bis [aquo-triamminecobalt (III)] nitrate-2-hydrate has been determined by x-ray diffraction using counter techniques. The compound crystallizes in the monoclinic space group C 2h 5 -P2 1 /n with a=9.444 (2), b=9.684 (3), c=10.736 (3) Å, β=90.1 (2)°, Z= 2. A total of 1765 independent reflections was used in solving the structure, which was refined to a conventional R 1 -factor of 0.047. It was not possible to distinguish by x-ray methods between the oxygen and nitrogen atoms of the NH 3 - and H 2 O molecules in the complex cation, because of their similarity in point of electrostatical and spatial behaviour.

Open Access June 2, 2014

Über die Einschiebung von Metallen der II. Nebengruppe in die Metall-Metall-Bindung zweikerniger Carbonylmetallate / About the Insertion of Group II Metals into the Metal Metal Bond of Binuclear Carbonylmetalates

H. Behrens, H.-D. Feilner, E. Lindner, D. Uhlig

Page range: 990-993

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Abstract

When [Cr 2 (CO) 10 ] 2⊖ or [Fe 2 (CO) 8 ] 2⊖ is reacted with Hg i. e. with group II metals at long reaction times above 100 °C insertion of the named metals into the Cr-Cr i. e. Fe-Fe bond of the both carbonylmetalates occurs yielding the new anionic complexes [(OC) 5 Cr- Hg- Cr (CO) 5 ] 2⊖ i. e. [(OC) 4 Fe-M-Fe (CO) 4 ] 2⊖ (M = Zn, Cd, Hg). The properties of the compounds as well as their IR and Raman spectra will be discussed.

Open Access June 2, 2014

Reaktionen an Diborylamin-Palladiumkomplexen / Reactions on Diborylamine Palladium Complexes

Günter Schmid, Lothar Weber

Page range: 994-996

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Abstract

Bis [bis (dimethylamino) boryl] dibromobenzyl - amine - palladium - bromide C 6 H 5 C (Br 2 ) - N {B [N (CH 3 ) 2 ] 2 } 2 PdBr and the corresponding iodo complex react with phosphines like (C 6 H 5 ) 3 P or (C 6 H 5 ) 2 P-CH 2 -CH 2 -P(C 6 H 5 ) 2 in benzene solution under substitution of the diborylamine ligand. Substitution products are {[(C e H 5 ) 3 P] 2 PdBr} 2 , [(C e H 5 ) 2 P (CH 2 ) 2 P (C 6 H 5 ) 2 PdBr] 2 and [(C 6 H 5 ) 2 P(CH 2 ) 2 P(C e H 5 ) 2 PdJ] 2 , diamagnetic crystalline compounds. On the contrary the dimeric C 6 H 5 C(J 2 ) - N{B[N(CH 3 ) 2 ] 2 } 2 PdJ and P(C e H 5 ) 3 form a complex with the formula C 6 H 5 C(J 2 )-N{B[N(CH 3 ) 2 ] 2 } 2 PdJ[P(C 6 H 5 ) 3 ] 2 . Here the diborylamine seems to be co ordinated only by one BN 2 -group. The other BN 2 -group of the starting material is substituted by the first, the co ordinated iodine atom of the Pd-J-Pd-bridge by the second phosphine molecule. A solution of this phosphine complex in CH 2 Cl 2 leads to yellow crystals of [(C e H 5 ) 3 PPdJ] n .

Open Access June 2, 2014

K-Absorption Spectral Investigations on Some Cobalt Complexes Involving Sulphur-Ligands

H. L. Nigam, U. C. Srivastava

Page range: 997-999

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Abstract

K-absorption edges of Cobalt in some complexes involving sulphur-ligands have been examined. The ligand-field splitting of 3d-orbitals is found to show up in the low energy region of the K-edge. These complexes have large 10 Dq values as estimated from electronic spectra. Edge-widths and edge-shifts have been measured and their correlation respectively to coordination stoichiometry and valency of the metal ion has been discussed. Splitting of the K-absorption maximum has been observed.

Open Access June 2, 2014

Der Redoxmechanismus des Systems Folsäure—Dihydrofolsäure— Tetrahydrofolsäure II / The Redox Mechanism of the System Folic Acid — Dihydrofolic Acid—Tetrahydrofolic Acid II

Klaus Kretzschmar, Walther Jaenicke

Page range: 999-1002

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Abstract

The electrochemical behaviour of folic acid, 7,8-dihydrofolic acid, and tetrahydrofolic acid was studied with polarographic, coulometric and spectroscopic methods in the pH range between 1,8 and 11,9. From the experiments a mechanism is derived which contains the formation of radicals and dimers, and the proton catalyzed reductive and non reductive cleavage of the side chain.

Open Access June 2, 2014

Massenspektrometrische Untersuchungen an α,α’-Bis-acetylen-ketonen / Mass Spectrometric Investigations with α,α’-Bis-acetylenic ketones

Eugen Müller, Adolph Segnitz, Klaus-Peter Zeller

Page range: 1003-1007

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Abstract

In the ion source of a mass spectrometer α,α’-bis-acetylenic ketones rearrange by elimination of carbon monoxide giving diyne-ion radicals.

Open Access June 2, 2014

Theoretical Study of Furotropones

N. Zambelli, N. Trinajstić

Page range: 1007-1010

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Abstract

Furotropones are predicted to be non-aromatic bicyclic molecules with polyenoid structures.

Open Access June 2, 2014

Kinetik der Reaktion von 2.4-Dinitrofluorbenzol mit Imidazol-, SH- und Imidazol-SH-Verbindungen / Kinetics of the Reaction of 2,4-dinitro-1-fluorobenzene with Imidazole-, SH- and Imidazole-SH-compounds

Renate Voigt, Helmut Wenck, Friedhelm Schneider

Page range: 1010-1016

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Abstract

First order rate constants of the reaction of a series of SH-, imidazole- and imidazole/SH-compounds with FDNB as well as their pH- and temperature dependence were determined. Some of the tested imidazole/SH-compounds exhibit a higher nucleophilic reactivity as is expected on the basis of their pK SH -values. This enhanced reactivity is caused by an activation of the SH-groups by a neighbouring imidazole residue. The pH-independent rate constants were calculated using the Lindley equation. The kinetics of DNP-transfer from DNP-imidazole to SH-compounds were investigated. The pH-dependence of the reaction displays a maximum curve. Donor in this reaction is the DNP-imidazolecation and acceptor the thiolate anion. The reaction rate of FDNB with imidazole derivatives is two to three orders of magnitude slower than with SH-compounds. No inter- or intra-molecular transfer of the DNP-residue from sulfure to imidazole takes place.

Open Access June 2, 2014

Biosynthesis of 5,6-Dimethylbenzimidazole Precursor-Function of 6,7-Dimethyl-8-ribityllumazine

Hans F. Kühnle, Paul Renz

Page range: 1017-1020

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Abstract

6,7-Dimethyl- 14 C-8-ribityllumazine was added to cell homogenates of Propionibacterium shermanii, previously grown anaerobically in the presence of cobaltous sulfate. This homogenates were shaken under aerobic conditions for 48 hours in order to produce vitamin B 12 from the corrinoids formed during the anaerobic growth phase. The vitamin B 12 was isolated and its 5,6-dimethylbenzimidazole moiety split off by acid hydrolysis. It was shown that the radioactive label of 6,7-dimethyl- 14 C-8-ribityllumazine was exclusively localized in the 5,6-dimethylbenzimidazole moiety of the vitamin B 12 molecule. The specific radioactivity of the 5,6-dimethylbenzimidazole isolated was 18 per cent of the specific radioactivity of the 6,7-dimethyl- 14 C-8-ribityllumazine added. The radioactive 5,6-dimethylbenzimidazole was further degraded in order to determine the radioactivity in the different carbon atoms. It was found that 45 percent of the total radioactivity was localized in the two methyl carbons (C-10+C-11) and 47 percent in carbon atoms 4 + 7 indicating that 5,6-dimethylbenzimidazole had been formed from two molecules of 6,7-dimethyl-8-ribityllumazine.

Open Access June 2, 2014

Ein biologisch wirksames Peptid aus der Haut der Neunaugen (Eudontomyzon danfordi vladykovi) / A Biological Active Peptide in the Skin of Lampreys (Eudontomyzon danfordi vladykovi)

G. Fischer, W. Albert

Page range: 1021-1023

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Abstract

In this paper two biological active peptides isolated from lampreys are described and characterized. We found that these peptides are located in the skin and are active on isolated organs and on blood pressure. These two peptides could be separated by chromatographic methods: it could be demonstrated that most of the activity is due to a bradykininlike peptide.

Open Access June 2, 2014

Aromatic Esters from the Liverwort, Isotachis japonica

Akihiko Matsuo, Mitsuru Nakayama, Shûichi Hayashi

Page range: 1023-1025

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Abstract

The oily portion of n-hexane and methanol extracts of the liverwort, Isotachis japonica Steph., was investigated, and three aromatic esters, benzyl benzoate, benzyl cinnamate and β-phenylethyl cinnamate, were identified as major components. It was established that terpene compounds, which were main constituents in essential oils of other liverworts, were not contained in this liverwort in noticeable proportion.

Open Access June 2, 2014

Molecular Interaction of ʟ-Tryptophan with Bases, Ribonucleosides and DNA

G. Arcaya, M. E. Pantoja, M. Pieber, C. Romero, J. C. Tohá

Page range: 1026-1030

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Abstract

The interaction of L-aromatic aminoacids with bases and nucleosides is described. Of these, ʟ-tryptophan interacts more strongly with bases and nucleosides as indicated by nuclear magnetic resonance, circular dichroism and solubility measurements. A possible ring-ring type interaction between the aminoacid and bases or nucleosides is proposed; this interaction being such that the hydrodinamic behaviour of the DNA molecule is unchanged. Ultra violet irradiated DNA is protected by ʟ-tryptophan. A mechanism of energy transfer from the DNA to tryptophan trough triplet-triplet states is discussed.

Open Access June 2, 2014

Synthesis and Turnover of Membrane Proteins in Rat Liver: An Examination of the Membrane Flow Hypothesis

Werner W. Franke, D. James Morre, Barbara Deumling, Ronald D. Cheetham, Jürgen Kartenbeck, Ernst-Dieter Jarasch, Hans-Walter Zentgraf

Page range: 1031-1039

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Abstract

The kinetics of synthesis and degradation of the protein constituents of nuclear membranes, endoplasmic reticulum membranes (rough-surfaced microsomes), Golgi apparatus membranes and plasma membranes were determined following a single administration of L- [guanido- 14 C] arginine by intraperitoneal injection. Membrane protein was determined as the fraction which resists sonication and sequential extrations with 1.5 M KCl, 0.1% deoxycholate and water to remove intravesicular, intracisternal (secretory), nucleo-, adsorbed and ribosome-associated proteins. The order of maximum labeling of membrane proteins was a) endoplasmic reticulum (nuclear membrane), b) Golgi apparatus, and c) plasma membrane. Rapid decreases in specific radioactivity followed maximal labeling of endoplasmic reticulum and Golgi apparatus membranes. These rapid turnover components of endoplasmic reticulum and Golgi apparatus were sufficient to account for labeling of plasma membranes via a flow mechanism. Incorporation of radioactivity into plasma membranes showed two distinct phases. The ultrastructural features underlying the biphasic pattern of incorporation into plasma membranes are discussed. Following initial incorporation and rapid turnover, membrane proteins were characterized by degradation kinetics approximating 1st order. Rates of degradation for Golgi apparatus and plasma membranes were faster than those for nuclear envelope and endoplasmic reticulum membranes. Assuming steady state conditions, an absolute synthetic rate of 7.1 mpg/min/avergage hepatocyte was calculated for membrane proteins of the plasma membrane. The results are compatible with intracellular movement and conversion of rough endoplasmic reticulum to plasma membrane via the membranes of the Golgi apparatus, i. e., membrane flow. Additionally, the kinetics indicate that membrane synthesis and transfer is restricted to specific parts of the endoplasmic reticulum and Golgi apparatus.

Open Access June 2, 2014

Größenbestimmung biologischer Partikel durch Gelchromatographie an Sepharose 6B / Determination of Particle Size by Gel Chromatography with Sepharose 6B

Wolfram Gerlich

Page range: 1040-1044

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Abstract

Gel chromatography with 6% agarose gel (Sepharose 6B) can be used for measuring the Stokes’ radius of biological particles within the range of 1,5 nm and 35 nm. The molecular weight determination of proteins is not very reliable with this method. Hepatitis sera have been chromatographied to measure the size of hepatitis associated antigen (Australia-antigen). The radius of this antigen was determined to be 10,3 nm, which agrees with the results of electron microscopy and ultracentrifugation. The Stokes’ radius of human serum IgM was found to be 10,6 nm.

Open Access June 2, 2014

Stimulierung von Kulturen embryonaler Rattenzellen durch eine Proteinfraktion aus fötalem Kälberserum / Stimulation of Embryonic Rat Cells in Culture by a Protein Fraction Isolated from Fetal Calf Serum

I: Elektrophysiologische Messungen an den Oberflächenmembranen / I: Electrophysiological Measurements at the Cell Surface Membranes

Dieter F. Hülser, Werner Frank

Page range: 1045-1048

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Abstract

Normal embryonic rat cells incubated in serum-free medium accumulate in G 1 -phase of the cell cycle. On addition of a growth-stimulating protein isolated from fetal calf serum they are triggered to proceed through the cycle, and they resume DNA-synthesis 15 to 20 hours later. In this paper it is demonstrated that the surface membrane potential difference (PD) decreases immediately after changing serum-free medium against culture medium containing either calf serum or the isolated serum protein; the original PD is restored 2 to 3 hours later. Serumprotein without growthstimulating activity does not affect the PD. A permanent rat cell line which grows independently of serum also has been tested. The PD of these cells is not significantly influenced by calf serum.

Open Access June 2, 2014

Kinetische und chemische Untersuchungen über den Abbau von Di-N-acetylneuraminosyl-lacto-N-tetraose durch Neuraminidasen von Myxoviren und Vibrio cholerae / Kinetic and Chemical Experiments about the Decay of Di-N-acetylneuraminosyl-lacto-N-tetraose by Neuraminidases of Myxoviruses and Vibrio cholerae

Hubertus Von Nicolai, Rudolf Drzeniek, Fritz Zilliken

Page range: 1049-1051

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Abstract

The splitting capacity of different neuraminidases (sialidases) has been tested on di-N-acetyl-neuraminosyl-lacto-N-tetraose from human milk. The substrate contains two residues of N-acetyl-neuraminic acid (NeuNAc), linked in (a, 2 → 3) position to D-galactose at the non-reducing end and in (a, 2 → 6) position to the adjacent N-acetyl-D-glucosamin. Vibrio cholerae neuraminidase releases both NeuNAc molecules. Newcastle disease virus neuraminidase as well as the enzyme from fowl plague virus cleave the (a, 2→3) linkage preferentially. The hydrolytic activity of both virus enzymes towards the (a, 2 → 6) linkage is highly reduced. Under specified experimental conditions the enzymes are useful for the structural determination of NeuNAc linkages in oligosaccharides.

Open Access June 2, 2014

Über ein Glykolipopeptid aus Chloroplasten und sein serologisches Verhalten / On a Glycolipopeptide from Chloroplasts and its Serological Properties

Doris Hiedemann-Van Wyk

Page range: 1052-1054

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Abstract

The methanol-ether extract of chloroplasts contains an ether-insoluble part which after purification was classified as a glycolipopeptide. This fraction can be precipitated by the antisera to the lamellar system of chloroplasts. By immunisation of rabbits with this compound, a glycolipopeptideantiserum was obtained. This antiserum precipitates the glycolipopeptide. There was only one precipitation line in the diffusion test. This antiserum agglutinates stroma-freed chloroplasts and precipitates the ultrasonic supernatant and the structural protein of stroma-freed chloroplasts. It must be concluded from the results of the agglutination inhibition experiments, that the reactive groups of the glycolipopeptide, in regard to the lamellar system antiserum, are the same as those of the structural protein and the supernatant of the sonicated lamellar system. The annulment of the immunreaction after periodate treatment points to the role of carbohydrates as the determinant groups.

Open Access June 2, 2014

Artspezifische Paarungsrufe bei Discoglossus pictus Otth, 1837 und Discoglossus sardus Tschudi, 1837 (Discoglossidae, Anura) / Species Specific Mating Calls in Discoglossus pictus Otth, 1837 and Discoglossus sardus Tschudi, 1837 (Discoglossidae, Anura)

Ernst Weber, Hans Schneider

Page range: 1055-1057

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Abstract

In Discoglossus pictus as well as in Discoglossus sardus the mating calls are produced during inspiration and expiration. Accordingly, the mating calls consist of two pulse groups arranged in series. In both species the mating calls are specific. Their duration depends upon the temperature and the length of the animals.

Open Access June 2, 2014

Synthesis of rRNA, tRNA and Other RNA-species Concomitant with Polyribosome Formation in Aging Potato Tuber Slices

Günter Kahl

Page range: 1058-1064

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Abstract

One of the earliest consequences of slicing plant storage organs such as potato tubers into thin disks is the formation of polysomes, which in potato slices is complete after 9 hours and is dependent on transcription. Fresh disks do not incorporate 32 P, 3 H-uridine or 14 C-leucine into their ribosomes, whereas ribosomes and polysomes of aged disks use these precursors effectively. This development can be completely blocked by actinomycin D. Among the different RNAs synthesized during aging is 28S- and 16S—rRNA, 5S—RNA, tRNA, and a component sedimenting around 15—18S with a base-composition different from 16S—rRNA, 5S- and 4S—RNA and which supports peptide formation in an in vitro incorporation system. It is suggested that this compound represents mRNA, which is not available immediately after slicing the tissue. These findings are consistent with the view of a derepression phenomenon in sliced storage tissue.

Open Access June 2, 2014

Activation of Protein Synthesis in Aging Potato Tuber Slices

Günter Kahl

Page range: 1064-1067

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Abstract

Whereas ribosome preparations of freshly sliced potato disks do not show appreciable activity in an in-vitro amino acid incorporation system, aging of the tissue leads to a greatly enhanced incorporation activity which reaches its maximum 24 hours after slicing. If ribosomes from freshly excised disks are provided with polyuridylic acid, their activity in the incorporation of phenylalanine is increased about 8 fold. Moreover, an RNA-fraction can be dissociated by EDTA from ribosomes of aged potato tuber slices, which sediments at 15 —18S, has a base composition different from that of 16S — rRNA, 5S-and 4S —RNA, and is not present on ribosomes of fresh slices. Its appearance is inhibited by actinomycin D and therefore most probably dependent on transcription. This compound, purified from sucrose gradients, enhances in vitro leucine incorporation into peptide material by ribosomes of fresh potato slices. The possibility is discussed that this fraction-among other factors-is responsible for the enhanced protein synthesis after slicing plant storage organs, and is indicative of a general derepression phenomenon in these tissues.

Open Access June 2, 2014

Notizen: Schwingungsspektren und Kraftkonstanten symmetrischer Kreisel. VIII. Raman- und IR-Spektren von H₃SiBr und D₃SiBr / Raman and Infrared Spectra of H₃SiBr and D₃SiBr

H. Bürger, J. Cichon, A. Ruoff

Page range: 1068-1069

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Open Access June 2, 2014

Notizen: Zur Struktur der Wasserstoffanaloga der Wolframbronzen / Concerning the Structure of Hydrogen Analogues of Tungsten Bronzes

Einhard Schwarzmann, Reinhard Birkenberg

Page range: 1069-1070

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Open Access June 2, 2014

Notizen: Hydrazin als Brückenligand in neutralen Komplexen von Chrom und Wolfram / Hydrazine as Bridging Ligand in Neutral Complexes of Chromium and Tungsten

D. Sellmann

Page range: 1070-1071

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Open Access June 2, 2014

Notizen: Über eine direkte Darstellung N-substituierter cyclischer Schwefel-Stickstoff-Verbindungen aus Schwefel und Azidoameisensäureestern / On a Direct Preparation of N-substituted Cyclic Sulfurnitrogen-compounds from Sulfur and Azido Formates

Franz Fehér, Horst Kulus

Page range: 1071-1072

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Open Access June 2, 2014

Notizen: Chloro-isocyanato-glyoxal

Glyoxychloroisocyanate

N. Singh, H. P. Latscha

Page range: 1072-1072

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Open Access June 2, 2014

Notizen: Der Schnitt Cu₂Te—As₂Te₃ / The System Cu₂Te—As₂Te₃

R. Blachnik, B. Gather

Page range: 1073-1073

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Open Access June 2, 2014

Notizen: In₄Bi₂S₉, eine neue Verbindung im System In₂S₃—Bi₂S₃ / In₄Bi₂S₉, a New Compound in the System In₂S₃ — Bi₂S₃

V. Krämer, R. Nitsche

Page range: 1074-1074

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Open Access June 2, 2014

Notizen: Uptake of Polynucleotides by Mouse Ascites Tumor Cells (X). pH-Dependent Uptake of Synthetic Homoribopolymers

P. L. Schell

Page range: 1074-1076

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Open Access June 2, 2014

Notizen: Äthylierung von Guanin-N-7 in den Nukleinsäuren von Rattenleber und -embryonen durch Äthylnitrosoharnstoff / Ethylation of Guanine-N-7 in the Nucleic Acids of Rat Embryos and Liver by Ethylnitrosourea

R. Goth, M. F. Rajewsky

Page range: 1076-1077

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Open Access June 2, 2014

Notizen: Beziehung zwischen N-Acetylneuraminsäuregehalt und Tumoralter beim Zajdela-Asciteshepatom / Relationship Between Content of N-acetylneuraminic Acid and Tumour Age in the Zajdela Ascites Hepatoma

Winfried Krüger

Page range: 1078-1079

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Open Access June 2, 2014

Notizen: Ausbleiben einer Penicilloylsubstitution bei der Reaktion von Staphylokokken-Penicillinase mit Penicillin-G / No Penicilloyl-substitution during Reaction of Penicillinase from Staphylococcus aureus with Penicillin G

R. Bingöl, W. Schaeg, H. Blobel

Page range: 1080-1080

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Open Access June 2, 2014

Notizen: Embryotoxische Aktivität von N-Phthalyl-DL-isoglutamin / Embryotoxic Activity of N-Phthaloyl-DL-isoglutamine

W. Meise, F. Köhler

Page range: 1081-1082

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Open Access June 2, 2014

Notizen: Haemagglutinine aus Schnecken: Zur Frage ihrer biologischen Funktion / Haemagglutinins in Snails. A Discussion of their Biological Function

Hans Kothbauer, Helmut Schenkel-Brunner

Page range: 1082-1084b

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Open Access June 2, 2014

Notizen: Monoaminhaltige Zellelemente im stomatogastrischen Nervensystem und in den Corpora cardiaca von Schistocerca gregaria Forsk. (Insecta, Orthoptera) / Monoamine-containing Cell Elements in the Stomatogastric Nervous System and in the Corpora cardiaca of Schistocerca gregaria Forsk. (Insecta, Orthoptera)

Nikolai Klemm

Page range: 1085-1086

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Open Access June 2, 2014

Notizen: Bildung von Pulvinsäurederivaten durch Hygrophoropsis aurantiaca (Paxillaceae-Boletales) in vitro / Formation of Pulvinic Acids by Hygrophoropsis aurantiaca (Paxillaceae-Boletales) in Vitro

A. Bresinsky, R. Bachmann

Page range: 1086-1087

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Open Access June 2, 2014

BESPRECHUNGEN

Page range: 1087-1088

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About this journal

Objective
Zeitschrift fuer Naturforschung B (ZNB) publishes novel research in all areas of inorganic chemistry, organic chemistry, and analytical chemistry. In particular, the journal focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, natural product chemistry and, to a lesser extent, on analytical chemistry. For more than 65 years Zeitschrift fuer Naturforschung B has been open to contributions from all fields of experimental and theoretical chemistry. Zeitschrift fuer Naturforschung B publishes 12 issues per volume/year. Sometimes double issues occur.

Topics

Solid state chemistry
Coordination chemistry
Main group element chemistry
Organic chemistry
Natural product chemistry

Article formats
Original (full) papers, research notes and preliminary communications, reports on specific research topics of current interest (reviews)

> Information on submission process

Volume 26 Issue 10

Issue of Zeitschrift für Naturforschung B

Über die Darstellung von Derivaten des S4N3Cl / The Preparation of S4N3Cl Derivatives

Abstract

Phosphinimino-phosphine durch Entsilylierung von N-Silyl-phosphiniminen / Phosphinimino-phosphines by Desilylation of N-silyl-phosphinimines

Abstract

Chemische Verschiebungen der 31P-Kernresonanz-Multipletts von Tetraphosphortrisulfid in einigen Lösungsmitteln / Chemical Shifts of the 31P-NMR-Multiplets of Tetraphosphorus Trisulfide in Some Solvents

Abstract

Die Kristallstruktur von Di-μ-hydroxo-bis[aquotriamminkobalt(III)]-nitrat-2-Hydrat / The Crystal Structure of Di-μ-hydroxo-bis[aquotriamminecobalt (III)] - nitrate-2-hydrate

Abstract

Über die Einschiebung von Metallen der II. Nebengruppe in die Metall-Metall-Bindung zweikerniger Carbonylmetallate / About the Insertion of Group II Metals into the Metal Metal Bond of Binuclear Carbonylmetalates

Abstract

Reaktionen an Diborylamin-Palladiumkomplexen / Reactions on Diborylamine Palladium Complexes

Abstract

K-Absorption Spectral Investigations on Some Cobalt Complexes Involving Sulphur-Ligands

Abstract

Der Redoxmechanismus des Systems Folsäure—Dihydrofolsäure— Tetrahydrofolsäure II / The Redox Mechanism of the System Folic Acid — Dihydrofolic Acid—Tetrahydrofolic Acid II

Abstract

Massenspektrometrische Untersuchungen an α,α’-Bis-acetylen-ketonen / Mass Spectrometric Investigations with α,α’-Bis-acetylenic ketones

Abstract

Theoretical Study of Furotropones

Abstract

Kinetik der Reaktion von 2.4-Dinitrofluorbenzol mit Imidazol-, SH- und Imidazol-SH-Verbindungen / Kinetics of the Reaction of 2,4-dinitro-1-fluorobenzene with Imidazole-, SH- and Imidazole-SH-compounds

Abstract

Biosynthesis of 5,6-Dimethylbenzimidazole Precursor-Function of 6,7-Dimethyl-8-ribityllumazine

Abstract

Ein biologisch wirksames Peptid aus der Haut der Neunaugen (Eudontomyzon danfordi vladykovi) / A Biological Active Peptide in the Skin of Lampreys (Eudontomyzon danfordi vladykovi)

Abstract

Aromatic Esters from the Liverwort, Isotachis japonica

Abstract

Molecular Interaction of ʟ-Tryptophan with Bases, Ribonucleosides and DNA

Abstract

Synthesis and Turnover of Membrane Proteins in Rat Liver: An Examination of the Membrane Flow Hypothesis

Abstract

Größenbestimmung biologischer Partikel durch Gelchromatographie an Sepharose 6B / Determination of Particle Size by Gel Chromatography with Sepharose 6B

Abstract

Stimulierung von Kulturen embryonaler Rattenzellen durch eine Proteinfraktion aus fötalem Kälberserum / Stimulation of Embryonic Rat Cells in Culture by a Protein Fraction Isolated from Fetal Calf Serum

I: Elektrophysiologische Messungen an den Oberflächenmembranen / I: Electrophysiological Measurements at the Cell Surface Membranes

Abstract

Abstract

Über ein Glykolipopeptid aus Chloroplasten und sein serologisches Verhalten / On a Glycolipopeptide from Chloroplasts and its Serological Properties

Abstract

Artspezifische Paarungsrufe bei Discoglossus pictus Otth, 1837 und Discoglossus sardus Tschudi, 1837 (Discoglossidae, Anura) / Species Specific Mating Calls in Discoglossus pictus Otth, 1837 and Discoglossus sardus Tschudi, 1837 (Discoglossidae, Anura)

Abstract

Synthesis of rRNA, tRNA and Other RNA-species Concomitant with Polyribosome Formation in Aging Potato Tuber Slices

Abstract

Activation of Protein Synthesis in Aging Potato Tuber Slices

Abstract

Notizen: Schwingungsspektren und Kraftkonstanten symmetrischer Kreisel. VIII. Raman- und IR-Spektren von H3SiBr und D3SiBr / Raman and Infrared Spectra of H3SiBr and D3SiBr

Notizen: Zur Struktur der Wasserstoffanaloga der Wolframbronzen / Concerning the Structure of Hydrogen Analogues of Tungsten Bronzes

Notizen: Hydrazin als Brückenligand in neutralen Komplexen von Chrom und Wolfram / Hydrazine as Bridging Ligand in Neutral Complexes of Chromium and Tungsten

Notizen: Über eine direkte Darstellung N-substituierter cyclischer Schwefel-Stickstoff-Verbindungen aus Schwefel und Azidoameisensäureestern / On a Direct Preparation of N-substituted Cyclic Sulfurnitrogen-compounds from Sulfur and Azido Formates

Notizen: Chloro-isocyanato-glyoxal

Glyoxychloroisocyanate

Notizen: Der Schnitt Cu2Te—As2Te3 / The System Cu2Te—As2Te3

Notizen: In4Bi2S9, eine neue Verbindung im System In2S3—Bi2S3 / In4Bi2S9, a New Compound in the System In2S3 — Bi2S3

Notizen: Uptake of Polynucleotides by Mouse Ascites Tumor Cells (X). pH-Dependent Uptake of Synthetic Homoribopolymers

Notizen: Äthylierung von Guanin-N-7 in den Nukleinsäuren von Rattenleber und -embryonen durch Äthylnitrosoharnstoff / Ethylation of Guanine-N-7 in the Nucleic Acids of Rat Embryos and Liver by Ethylnitrosourea

Notizen: Beziehung zwischen N-Acetylneuraminsäuregehalt und Tumoralter beim Zajdela-Asciteshepatom / Relationship Between Content of N-acetylneuraminic Acid and Tumour Age in the Zajdela Ascites Hepatoma

Notizen: Ausbleiben einer Penicilloylsubstitution bei der Reaktion von Staphylokokken-Penicillinase mit Penicillin-G / No Penicilloyl-substitution during Reaction of Penicillinase from Staphylococcus aureus with Penicillin G

Notizen: Embryotoxische Aktivität von N-Phthalyl-DL-isoglutamin / Embryotoxic Activity of N-Phthaloyl-DL-isoglutamine

Notizen: Haemagglutinine aus Schnecken: Zur Frage ihrer biologischen Funktion / Haemagglutinins in Snails. A Discussion of their Biological Function

Notizen: Bildung von Pulvinsäurederivaten durch Hygrophoropsis aurantiaca (Paxillaceae-Boletales) in vitro / Formation of Pulvinic Acids by Hygrophoropsis aurantiaca (Paxillaceae-Boletales) in Vitro

BESPRECHUNGEN

Über die Darstellung von Derivaten des S₄N₃Cl / The Preparation of S₄N₃Cl Derivatives

Chemische Verschiebungen der ³¹P-Kernresonanz-Multipletts von Tetraphosphortrisulfid in einigen Lösungsmitteln / Chemical Shifts of the ³¹P-NMR-Multiplets of Tetraphosphorus Trisulfide in Some Solvents

Notizen: Schwingungsspektren und Kraftkonstanten symmetrischer Kreisel. VIII. Raman- und IR-Spektren von H₃SiBr und D₃SiBr / Raman and Infrared Spectra of H₃SiBr and D₃SiBr

Notizen: Der Schnitt Cu₂Te—As₂Te₃ / The System Cu₂Te—As₂Te₃

Notizen: In₄Bi₂S₉, eine neue Verbindung im System In₂S₃—Bi₂S₃ / In₄Bi₂S₉, a New Compound in the System In₂S₃ — Bi₂S₃