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2001[X]
61Author    TeresaE. Krai, Janina Kuczera, Stanislaw Przestalski, TeresaE. KraiRequires cookie*
 Title    Organometallics and Quaternary Ammonium Salts Affect Calcium Ion Desorption from Lecithin Liposome Membranes  
 Abstract    The objective of the present work was to compare the effects of groups o f tin and lead organometallic com pounds and their mixtures with amphiphilic quaternary ammonium salts (Q A S) on the process of calcium ion desorption from lecithin liposom e membranes, as de­ pendent on the properties of the hydrophilic and hydrophobic parts o f QAS. In the investiga­ tions the method of radioactive labels was applied. Synergism and antagonism in the action of both groups o f compounds were found. The effectiveness o f the cooperation depended more on chain length o f Q A S compounds than on the size and polarity of their hydrophobic parts. The most effective of all compounds studied was a the mixture of benzyldimethylam-monium chloride in a mixture with tripropyltin. Since the rate of calcium desorption proved to be a good measure o f efficacy of biologically active surfactants, it seem s that the conclu­ sions reached in this paper may be useful for choosing compounds which are able to decon­ taminate the environm ent polluted with heavy metals. 
  Reference    Z. Naturforsch. 56c, 395 (2001); received September 7 2000/January 26 2001 
  Published    2001 
  Keywords    Organometallics, Quaternary Ammonium Salts, Cooperative Effect 
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 Identifier    ZNC-2001-56c-0395 
 Volume    56 
62Author    Dariusz Man, Marian Podolak, Ryszard OlchawaRequires cookie*
 Title    Computer Simulations of the Electric Interactions between the Phospholipid Head-Groups and Ionic Admixtures in the Membrane Surface  
 Abstract    Phospholipid Liposomes, Dipole Matrix. Binding Energy Some phospholipids (e.g. lecithin) form a system o f electric dipoles on the membrane surface layer. In the case of lecithin the positive dipole charge is located on the choline and the negative one on the phosphoric molecule group. These dipoles are arranged almost paral­ lel to the membrane surface. Taking the dipole membrane structure as a base for further investigations, a computer model of the electrostatic interaction betw een the dipole system and the ionic admixture was investigated. The model presumes hexagonal centered or a rectangular flat geometry of the 121 dipoles distribution. The dipoles may rotate freely around round the motionless symmetry axis perpendicular to the system surface. The initial state is given by fixing the geometry of the dipole matrix and ionic admixture distribution. Subsequently this system underwent a computer simulation which consisted of a calculation of resultant force moments acting on each dipole caused by other dipoles and ions. These force moments lead the system to the equilibrium state (minimum o f the binding energy). The minimum energy value of the dipoles system depends on concentration and charge of the admixtured ions. The results of repeated simulations indicate that the system achieve the least of all binding energy (the most stable equilibrium state) at 1.5% concentration of admix­ tured ions in case of ion charge equal to IQ (where Q denotes arbitrary unit of ion charge) and at 2.5% concentration of admixtured ions in case of ion charge equal to 2Q. The calcu­ lated results are in a good agreement with the experimental. 
  Reference    Z. Naturforsch. 56c, 402 (2001); received March 3 2000/January 24 2001 
  Published    2001 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0402.pdf 
 Identifier    ZNC-2001-56c-0402 
 Volume    56 
63Author    BożennaR. Óżycka-Roszak, RomualdŻ. Yłka, TeresaK. Ral, A. Driana PrzyczynaRequires cookie*
 Title    Counterion Effects on Interaction of Amphiphilic Quaternary Ammonium Salts with Model Membranes  
 Abstract    The micellization as well as the interaction with model membranes of dodecyltrimethylam-monium halides (D T A X) and N-dodecyl-N,N-dim ethyl-N-benzylamm onium halides (D B eA X) were studied at 298K and 313K by means o f titration calorimetry. The calorimetric curves reflect both the counterion and benzyl group effects on the interaction o f the surfac­ tants studied with the lipid bilayer. Bromide as counterion enhanced the interactions more than chloride of both D TA X and D B eA X compounds with model membranes. Further, we studied the influence o f D TA X and D B eA X on calcium ion desorption from the liposom e membrane using a radioactive tracer method. D B eA X proved more efficient in desorption o f calcium than D TA X. Iodides of these compounds enhanced this process more than bromides and chlorides. 
  Reference    Z. Naturforsch. 56c, 407 (2001); received D ecem ber 4 2000/January 24 2001 
  Published    2001 
  Keywords    Counterions, M odel Membranes, Micellization 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0407.pdf 
 Identifier    ZNC-2001-56c-0407 
 Volume    56 
64Author    Paxton Loke, Tiow-Suan SimRequires cookie*
 Title    Site-Directed Mutagenesis of Proline-285 to Leucine in Cephalosporium acremonium Isopenicillin N -Synthase Affects Catalysis and Increases Soluble Expression at Higher Temperatures  
 Abstract    The conversion of Ö-(L-a-aminoadipyl)-L-cysteinyl-D-valine (A C V) to isopenicillin N is de­ pendant on the catalytic action of isopenicillin N -synthase (IPNS), an important enzyme in the penicillin and cephalosporin biosynthetic pathway. One of the amino acid residues suggested by the Aspergillus nidulans IPNS crystal structure for interaction with the valine isopropyl group of ACV is proline-283. Site-directed mutagenesis of the corresponding pro­ line-285 to leucine in Cephalosporium acremonium IPNS resulted in non-measurable activity but an increased soluble expression at higher temperatures in a heterologous E. coli host. 
  Reference    Z. Naturforsch. 56c, 413 (2001); received January ll/F ebruary 14 2001 
  Published    2001 
  Keywords    Isopenicillin N -Synthase, Site-Directed Mutagenesis, Proline 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0413.pdf 
 Identifier    ZNC-2001-56c-0413 
 Volume    56 
65Author    Stanka Stoeva3, Krassimira Idakievab, Nikolova Dessislava, Wolfgang Georgievab, Nicolay Voelter3, GenovbRequires cookie*
 Title    Penaeus monodon (Tiger Shrimp) Hemocyanin: Subunit Composition and Thermostability  
 Abstract    Arthropod Hemocyanin, Functional Unit, Stability Penaeus m onodon (class Crustacea, order D ecapoda) is one o f the largest shrimps o f the Penaeidea family from the Indo -West Pacific region. The dioxygen-transporting protein hemocyanin, isolated from the hemolymph of this invertebrate, is composed of three 7 5 -7 6 kDa structural/functional subunits designated as P m l, Pm2 and Pm3. The N-terminal se­ quences of the chains were determined and compared with those of other decapodan hem o­ cyanin subunits. Pm2 and Pm3 are highly hom ologous and electrophoretically undistinguisha-ble polypeptides. In comparison to P m l, they have an extension of six residues. Pm l is closely related to the subunit Pv2 of the Penaeus vannamei hemocyanin. Probably, subunits like Pml and Pv2 are family-specific for the Penaeidea hemocyanins and the other subunits are species-specific. Comparison of N-terminal sequences o f respiratory proteins from the sub-orders Natantia and Reptantia demonstrated family-and sub-order-specific sequences. A melting point of 69 °C, lower than those for the di-hexameric decapodan hemocyanins, was determined from the temperature dependence of ellipticity of the mono-hexameric Pen­ aeus m onodon hemocyanin. Thermostability of decapodan hemocyanins depends on their aggregation state. 
  Reference    Z. Naturforsch. 56c, 416 (2001); received January 26/February 23 2001 
  Published    2001 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0416.pdf 
 Identifier    ZNC-2001-56c-0416 
 Volume    56 
66Author    Zhang Jintong, H. An, Yan, Meng XianzuoRequires cookie*
 Title    Sex Pheromone of the Carpenterworm, Holcocerus insularis (Lepidoptera, Cossidae)  
 Abstract    Sex Pheromone, (Z)-3-Tetradecenyl A cetate, Holcocerus insularis By means of thin-layer chromatography (TLC), electroantennogram (E A G), gas chroma­ tography (G C), gas chromatography-mass spectrometry (GC-M S) and field tests, (Z)-3-tetra-decenyl acetate(Z3-14:A c), (£)-3-tetradecen-l-ol(E 3-14:O H), and (Z)-3-tetradecen-l-ol(Z 3-14:OH) at a ratio of 51:39:10 were identified from the female sex pheromone gland extracts of the carpenterworm, Holcocerus insularis Staudinger (Lepidoptera, Cossidae). The average amounts of Z3-14:Ac, E3-14:OH and Z3-14:OH in a single sex pheromone gland o f calling moth were 7.29±2.72 ng, 5.72±2.43 ng and 1.44±0.56 ng, respectively. This is the first time that Z3-14:Ac was identified as a com ponent of lepidopteran sex pheromone. Traps baited with rubber septa impregnated with Z3-14:Ac (500 |ig / septum) were more effective than the traps baited with virgin female. The addition of the E3-14:OH and Z3-14:OH to rubber septa baited with Z3-14:Ac did not modify H. insularius male attraction, but E3-14:Ac slightly enhanced trap catch. 
  Reference    Z. Naturforsch. 56c, 423 (2001); received January 18/January 28 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0423 
 Volume    56 
67Author    Irena Valterová, KláraU. Rbanová, O. Ldřich Hovorka, Jiří KindlRequires cookie*
 Title    Composition of the Labial Gland Secretion of the Bumblebee Males Bombus pomorum  
 Abstract    the Czech Republic, Flem ingovo namesti 2, 166 10 Praha 6 , The Czech Republic. Fax: 420 2 24310177. E-mail: irena@uochb.cas.cz Labial gland secretions of 22 males o f the bumblebee B om bus pom orum , collected in the Czech Republic, were analysed separately for each individual. The secretions contained 70 compounds among which saturated and unsaturated hydrocarbons strongly dominated. The proportion of hydrocarbons in the secretion was unusually high (8 5 -1 0 0 %) compared to other bumblebee species studied so far (3 -1 5 %). Methyl and ethyl esters of fatty acids, known from many other bumblebee species, formed only minor com ponents (less than 1 % in sum) of the secretions of several B. pom oru m individuals. N o terpenic compounds, typical for m ales' marking secretion of many bum blebee species, were detected in B. pom orum . The absolute quantities of hydrocarbons present in the labial gland extracts were comparable with those usually present in other species. The composition of hydrocarbons found in the labial glands was different from the profile of the cuticular hydrocarbons. Despite our expec­ tations in species exhibiting a regular patrolling and scent-marking behaviour, the labial gland extracts obtained from B. pom oru m males were unusually low concentrated and their chem i­ cal composition was atypical with respect of the proportions of hydrocarbons when compared with other patrolling species. This is the first report on the analysis of the labial gland secre­ tion of the B. pom orum males. 
  Reference    Z. Naturforsch. 56c, 430 (2001); received February 1/February 22 2001 
  Published    2001 
  Keywords    Apidae, Bumblebees, Marking Pheromone, Cuticular Hydrocarbons 
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 Identifier    ZNC-2001-56c-0430 
 Volume    56 
68Author    Anne-M Ari, M. Ustonen, Petteri Nieminen, Heikki Hyvärinen, Juha AsikainenRequires cookie*
 Title    Effects of Seasonality and Fasting on the Body Mass and Plasma Growth Hormone Concentrations of the Raccoon Dog {Nyctereutes procyonoides) and the Blue Fox (Alopex lagopus)  
 Abstract    A lopex lagopus, Growth Horm one, Nyctereutes procyonoides, Wintering Growth hormone (G H) promotes growth and endochondral ossification, but it is also im­ portant in the response to fasting due to its effects of increasing gluconeogenesis and lipolysis. In this study eleven raccoon dogs and blue foxes were followed for six months and their body mass and GH levels were measured. In November half of the animals of both species were put to a three-week fast. There were no significant differences in the GH levels between the animals of different ages and the subadults and adults both had quite low GH levels in the summer. Fasting had no effect on the GH levels of the raccoon dogs, but the fasting blue foxes had lower GH concentrations than the controls in N ov 16th. The control blue foxes experienced a significant increase in the GH levels in early November and the fasting blue foxes in late November. The GH concentrations o f all the raccoon dogs rose in early D ecem ­ ber. A s fasting did not cause an elevation in the GH levels but the concentrations increased with decreasing temperature and shortening daylength, the autumnal GH secretion o f these species could be regulated by endogenous seasonal rhythms entrained by exogenous Z eitgeb­ ers such as temperature or photoperiod. The autumnal increase of GH levels contributes to the response to fasting as an adaptation to survive the winter months with inadequate nutri­ tion. The raccoon dog which spends the coldest part of the winter in winter sleep seem s to be better adapted to a total fast than the actively wintering blue fox. 
  Reference    Z. Naturforsch. 56c, 437 (2001); received November 15 2000/January 24 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0437 
 Volume    56 
69Author    AlbrechtF. Kiderlen3, Oliver Kayserb, Daneel Ferreirac, H. Erbert KolodziejdRequires cookie*
 Title    Tannins and Related Compounds: Killing of Amastigotes of Leishmania donovani and Release of Nitric Oxide and Tumour Necrosis Factor a in Macrophages in vitro  
 Abstract    The antileishmanial and immunomodulatory potencies of a series of 28 polyphenols were evaluated in terms of extra-and intracellular leishmanicidal activity and macrophage activa­ tion for release of nitric oxide (N O), tumour necrosis factor (TNF) and interferon (IFN)-like properties. For this, several functional bioassays were employed including an in vitro model for leishmaniasis in which murine bone marrow-derived macrophages (B M M $) were infected with the obligate intracellular parasite Leishmania donovani, an extracellular Leish­ mania proliferation assay, a fibroblast-lysis assay (TNF-activity), and a biochemical assay for NO. Except for gallic acid, its methyl ester, shikimic acid and catechin (EC50 2 5 .8 -6 7 .9 nM) all polyphenols tested significantly inhibited the intracellular survival of L. donovani amasti­ gotes (EC 50 0 .4 -1 3 .9 nM) when compared with the clinically used agent, sodium stibogluco­ nate (EC 50 10.6 nM). In contrast, none of the samples proved to be directly toxic for the extracellular promastigote form of the parasite. Noteworthy, the phenolic samples showed only moderate or no cytotoxicity against the murine host cells (EC 50 10 to >144 nM). A l­ though NO is an important effector molecule in macrophage microbicidal activity, the induc­ ing potential of the test com pounds for its release was found to be very moderate ranging from 7 -5 4 jam (IFN-y/LPS 119 (.im). On the other hand, inhibition of NO production had no apparent effect on intracellular leishmanicidal activity of polyphenols. Their in vitro TNF-inducing potential producing 50% lysis in murine L929 cells increased in the order o f simple phenols and flavanols (3 4 -4 8 U /m l) < A -type proanthocyanidins (5 3 -8 0 U/m l) < B-type proanthocyanidins (6 4 -2 0 0 U /m l) < hydrolyzable tannins (2 8 7 -3 5 0 U/ml) at the host cell subtoxic concentration of 50 ^g/ml. Furthermore, gallic acid and some hydrolyzable tannins showed appreciable IFN-like activities (1 4 -2 3 U/m l) as reflected by inhibition of the cyto-pathic effect of encephalom yocarditis virus on fibroblast L 929 cells. The results provide a rational basis for the recorded anti-infectious efficacy o f traditionally used herbal medicines containing tannins in vivo, in the light of both only moderate direct antimicrobial activities of distinct polyphenols in vitro and the limited knowledge on their uptake in humans. 
  Reference    Z. Naturforsch. 56c, 444 (2001); received February 9/March 8 2001 
  Published    2001 
  Keywords    Polyphenols, Leishmania don ovan i, Immunomodulation, Tumour Necrosis Factor 
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 Identifier    ZNC-2001-56c-0444 
 Volume    56 
70Author    ChengL., Leena Straussab, Ari Ristimäkid, Tomi Strengb, Risto Santtib, Cheng Luo@utu, FiRequires cookie*
 Title    Constant Expression of Cyclooxygenase-2 Gene in Prostate and the Lower Urinary Tract of Estrogen-Treated Male Rats  
 Abstract    C yclooxygen ase-2, Semi/quantitative RT-PCR, G ene Expression Expression of cyclooxygenase-2 (E. C. 1.14.99.1) in prostate and the lower urinary tract (L U T) of the neonatally estrogenized male rat has been studied by using a C O X -2 's PCR fragment of 724 nt spanning 3 introns and a 478nt internal standard for quantitative RT-PCR. The same fragment of 724 nt was used for R N A probe in Northern hybridization. Neonatal estrogenization (10 ^ig/day o f diethylstilbestrol on days 1 -5) had no effect on C O X -2 expression in prostatic urethra, prostatic lobes, or bladder. A cute estrogen treatment of castrated animals did not induce C O X -2 expression, either. In addition the differential expression of basal level of C O X -2 in the different lobes o f prostate in normal rat was demonstrated. Our results suggest a constant expression of C O X -2 gene in prostate and the lower urinary tract of the neonatally estrogenized (n eoD E S) rats. The present study indicates that the increased expression of C O X -2 is probably not essential for the estrogen-driven developm ent of stromal inflammation or hyperplastic and dysplastic alterations in the pros­ tate of neoD ES rats. 
  Reference    Z. Naturforsch. 56c, 455 (2001); received January ll/F ebruary 26 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0455 
 Volume    56 
71Author    Thomas Burger, Elm Ar, Wolfgang LangRequires cookie*
 Title    Self-Organization of Local Cortical Circuits and Cortical Orientation Maps: A Nonlinear Hebbian Model of the Visual Cortex with Adaptive Lateral Couplings  
 Abstract    A nonlinear, recurrent neural network model o f the visual cortex is presented. Orientation maps emerge from adaptable afferent as well as plastic local intracortical circuits driven by random input stimuli. Lateral coupling structures self-organize into D O G profiles under the influence of pronounced emerging cortical activity blobs. The m odel's simplified architecture and features are modeled to largely mimik neiirobiological findings. 
  Reference    Z. Naturforsch. 56c, 464 (2001); received August 11 2000/February 1 2001 
  Published    2001 
  Keywords    Self-Organisation, Local Cortical Circuits, Nonlinear Hebbian Learning 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0464.pdf 
 Identifier    ZNC-2001-56c-0464 
 Volume    56 
72Author    Walter Feucht3, Jürgen PolsterRequires cookie*
 Title    Nuclei of Plants as a Sink for Flavanols  
 Abstract    Onion cepa (L.) and Tsuga canadensis (L.) Carr, were investigated histochemically on the association of flava­ nols to nuclei. The young roots of Onion cepa are totally devoid of flavanol structures. Therefore, the excised roots tips were directly incubated into different solutions of flavanols. A fter 3 h of incubation a flavanol binding on the nuclei was recognizable, as seen by a yellowish-brown tanning reaction. Still to ensure the presence of flavanols on the nuclei, subsequent staining with the p-dimethylaminocinnamaldehyde reagent (DM ACA) re­ sulted in an intense blue colouration. Tsuga canadensis has significant amounts of vacuolar flavanol deposits in all parts of the tree as indicated by the DM ACA rea­ gent. It is obvious that also the nuclei were associated strongly with flavanols which can be dem onstrated par­ ticularly elegant in the cells of the seed wings by histo-chemical methods. However, the mode of flavanol re­ lease from the original deposits is not yet clear. 
  Reference    Z. Naturforsch. 56c, 479—481 (2001); received November 21 2000/March 12 2001 
  Published    2001 
  Keywords    Flavanols, Nucleus, Histochemistry, DM ACA Reagent 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0479_n.pdf 
 Identifier    ZNC-2001-56c-0479_n 
 Volume    56 
73Author    ThomasR G Arbe, Hideaki YukawaRequires cookie*
 Title    Common Solvent Toxicity: Autoxidation of Respiratory Redox-Cyclers Enforced by Membrane Derangement  
 Abstract    Respiration, Lipophilicity, Prooxidants Unspecific biological effects of chemically diverse solvents strikingly reveal the unifying motif of oxidant toxicity both in higher organisms and in aerobic bacteria. In a few spectacu­ lar cases, solvent metabolites with oxidant properties were dem onstrated, which however cannot explain extrahepatic toxicity, e.g. in muscle and nerve cells. A common source of solvent-inducible oxidants, by contrast, is suggested to be located in mitochondria or, more general, in m embranes where the respiratory chain operates. Orderly respiration depends on membrane integrity, which is invariably compromised by exposure to most solvents and many other lipophils. In rat mitochondria, toluene-induced membrane derangem ent has been di­ rectly implicated with superoxide production, resulting from autoxidation of the membrane-located respiratory redox-cycler ubisemiquinone. A related mechanism may occur in bacteria: Exposure of Escherichia coli to lipophils such as ethanol, tetralin, indole, chlorpromazine and procaine, or to heat shock, induces anti-oxidant proteins, which are reliable indicators of increased oxidant levels. Although many molecular details remain to be elucidated, this review documents that oxidant toxicity of lipophilic compounds is a common physiological phenom enon correlated with derangement of membranes where respiratory processes take place. Subjective consequences of acute oxidant injury are probably the hangover from alco­ hol and nicotine consumption, and the sudden death from recreational solvent abuse. Sugges­ tions concerning oxidants as major contributors to ageing remain unchallenged. T ren ds A r tic le -M in irev iew 
  Reference    Z. Naturforsch. 56c, 483—491 (2001); received February 13/March 16 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0483 
 Volume    56 
74Author    Huong Doan, Thi Mai3, Hanh Trinh Van-Dufata, Sylvie Michel3, François Tillequin3, David Bastienb, Thierry SévenetbRequires cookie*
 Title    A New Diprenyl Coumarin and Alkaloids from the Bark of Zanthoxylum dim orphophyllum (Rutaceae)  
 Abstract    Zanthoxylum dim orphophyllum , Rutaceae, New Diprenyl Coumarin The alkaloids chelerythrine. norchelerythrine. oxyavicine. canthine-6-one. 4,5-dihydrocan-thin-6-one, and y-fagarine were isolated from Zanthoxylum dimorphophyllum bark, together with two coumarins, scoparone and dimoxylin. This latter is a novel compound whose struc­ ture was elucidated on the basis of its spectral data. 
  Reference    Z. Naturforsch. 56c, 492—494 (2001); received March 1 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0492 
 Volume    56 
75Author    Katharina Aulinger3, Helmut Beslb, Peter Spiteller3, Michael Spitellerc, Wolfgang Steglich3Requires cookie*
 Title    Melanocrocin, a Polyene Pigment from M elanogaster broomeianus (Basidiomycetes)  
 Abstract    A new polyene pigment, melanocrocin, has been isolated either from fruit bodies or myce­ lial cultures of the subterranean fungus Melanogaster broomeianus. The structure of the pig­ m ent was determ ined by spectroscopic methods and chemical transformations. Melanocrocin is the jY-acyl derivative of L-phenylalanine methyl ester with a polyolefinic carboxylic acid. 
  Reference    Z. Naturforsch. 56c, 495—498 (2001); received February 19/April 6 2001 
  Published    2001 
  Keywords    Melanogaster broomeianus, Melanocrocin, Polyene Pigments 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0495.pdf 
 Identifier    ZNC-2001-56c-0495 
 Volume    56 
76Author    Eckhard Wollenweber3, M. Arion, D. Ö. Rr3, JanF. StevensbRequires cookie*
 Title    A Dihydroflavonol with Taxonomic Significance from the Fern Notholaena sulphurea  
 Abstract    Notholaena sulphurea, Farinose Indum ent, Flavonoids A new flavonoid, 2,3-^rans-5,2'-dihydroxy-7,8-dimethoxy-dihydroflavonol-3-0-acetate, was isolated from the farinose coating on the lower leave surface of the fern, Notholaena sul­ phurea. The 2,3-cis diastereoisomer was isolated as a co-constituent. This novel acylated flavonoid is characteristic for the chemotype of N. sulphurea exhibiting yellow frond exudate. Its orrurrence underlines the affiliation of the species with the genus Notholaena. 
  Reference    Z. Naturforsch. 56c, 499—502 (2001); received February 16 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0499 
 Volume    56 
77Author    BraulioM. Fraga3, InmaculadaC. Abrerab, Matfas Reina3, David Terrero3Requires cookie*
 Title    Two New Sesquiterpenes from Laurus azorica  
 Abstract    The structures of a new eudesmane sesquiterpene, lauradiol, and a new secoeudesmane, azoridione, have been determined by spectroscopic methods. These compounds and the known sesquiterpenic alcohols, clovanediol and caryophyllenol II, have been isolated from the aerial parts of Laurus azorica. 
  Reference    Z. Naturforsch. 56c, 503—505 (2001); received March 12 2001 
  Published    2001 
  Keywords    Laurus azorica, Sesquiterpenes, Lauradiol, Azoridione 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0503.pdf 
 Identifier    ZNC-2001-56c-0503 
 Volume    56 
78Author    MilkaN. Todorova3, LjubaN. EvstatievaRequires cookie*
 Title    Comparative Study of Tanacetum Species Growing in Bulgaria  
 Abstract    Tanacetum species, Asteraceae, Sesquiterpene lactones Chemical investigation of the Bulgarian species Tanacetum. parthenium, T. millefolium, T. achilleifolium, T.corymbosum and T. macrophyllum afforded in addition to 24 known sesqui­ terpene lactones a new 12, 8-eudesmanolide 22. Besides, four known highly oxigenated terpe­ noids and a new keto-diol 30 of the rare iphionane skeleton were also isolated. The structures were elucidated on the basis of their spectral properties. The accumulation of the different sesquiterpene lactones in the studied species and there classification is discussed. 
  Reference    Z. Naturforsch. 56c, 506—512 (2001); received January 25/March 19 2001 
  Published    2001 
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 Identifier    ZNC-2001-56c-0506 
 Volume    56 
79Author    Javier De, Santos Galindez, Lidia Fernández, M. Atellano, A. Na, M. D Íaz LanzaRequires cookie*
 Title    Iridoids from Scrophularia Genus  
 Abstract    We report here an updated summary about iridoid composition of a series from the genus Scrophularia which have been investigated until now from a phytochemistry point of view. In addition a list is included about iridoids isolated in our laboratory from different plant parts of Scrophularia scorodonia L.,which are com pared with iridoids from some species of the Scrophularia genus. The present study may serve as a current information to researchers working on phytochemistry and pharmacological aspects from the Scrophularia genus and possibly to serve as a new starting point for future 
  Reference    Z. Naturforsch. 56c, 513—520 (2001); received February 6/March 
  Published    2001 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0513.pdf 
 Identifier    ZNC-2001-56c-0513 
 Volume    56 
80Author    D. Enata Kasaj3, Liselotte Krenn3-, Sonja Prinzb, AntjeH. Üfnerb, Ernst Haslingerb, Shi Shan, Yuc, Brigitte KoppaRequires cookie*
 Title    Flavon-and Flavonolglycosides from A chillea pannonica Scheele  
 Abstract    The detailed investigation of a methanolic extract of aerial parts of Achillea pannonica SCH EELE, within a chemotaxonomic study led to the isolation of 6 flavonoid glycosides. Besides rutin, apigenin-7-O-glucopyranoside, luteolin-7-O-glucopyranoside, apigenin-7-O-ru-tinoside and acacetin-7-O-rutinoside, an unusual flavondiglucoside was isolated. Its structure was established by UV, 'H NMR and 13C NM R spectroscopic methods including 2D-NMR techniques and ESI-MS as luteolin-7,4'-0-ß-diglucoside. This substance is reported for the first time in the genus Achillea. Chemotaxonomic aspects are discussed briefly. 
  Reference    Z. Naturforsch. 56c, 521—525 (2001); received March 8 2001 
  Published    2001 
  Keywords    Achillea pannonica, Flavonoids, Luteolin-7, 4'-0-ß-diglucoside 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0521.pdf 
 Identifier    ZNC-2001-56c-0521 
 Volume    56 
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