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1991 (171)
1Author    K.Requires cookie*
 Title    Towards an Understanding of Plant Gene Regulation: The Action of Nuclear Factors  
 Abstract    u rt W eising an d G ü n te r K ahl Pflanzliche M olekularbiologie, B otanisches In stitu t der U niversität F ran k fu rt, Siesm ayerstraße 70, D -6000 F ra n k fu rt, B undesrepublik D eutschland Z. N atu rfo rsch . 46c, 1 — 11 (1991); received D ecem ber 7, 1990 O ver the last decade an intensive research on the regulation o f gene expression in viral and anim al system s has led to the discovery o f m -a c tin g regulatory sequences, the identification o f sequence-specific D N A -b in d in g p ro tein s (trans-acting factors), the ch aracterizatio n o f p ro ­ tein dom ains involved in D N A -p ro te in recognition and binding as well as in pro tein -p ro tein interactions, and the cloning an d sequencing o f genes encoding regulatory proteins. The tre ­ m endous progress in this field is now being com plem ented by advances in o u r un d erstan d in g o f how p lan t genes are regulated. A w ealth o f d a ta has accum ulated in the past few years w it­ nessing basic sim ilarities in the tra n scrip tio n a l regulation o f various eu karyotic genes, b u t also specific features o f p lan t genes. T his article collects presently available d ata, focusses on D N A -protein interactions in p la n t genes, p articu larly in light-regulated and "constitutively express­ ed " genes, rep o rts on the isolation o f p la n t genes encoding regulatory proteins, an d is m eant to induce fu rth er activities in p lan t gene research. 
  Reference    Z. Naturforsch. 46c, 1 (1991) 
  Published    1991 
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 Identifier    ZNC-1991-46c-0001 
 Volume    46 
2Author    Requires cookie*
 Title    Chemical Constituents of the Lichen Cladina macaronesica  
 Abstract    A n to n io G . G o n z á lez, Jaim e Berm ejo B arrera, Elsa M a R o d ríguez Pérez 
  Reference    Z. Naturforsch. 46c, 12 (1991) 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0012.pdf 
 Identifier    ZNC-1991-46c-0012 
 Volume    46 
3Author    C. Hristian LeuckertRequires cookie*
 Title    Beiträge zur Chemie der Flechtengattung Lasallia Merat  
 Abstract    On the C hem istry o f the Lichen G enus Lasallia M erat Birgit Posner, G u id o B enno Feige B otanisches In stitu t der U n iv ersität-G H Essen, F achbereich 9, S eptem ber 13, 1990 Lasallia, Lichen Substances, D epsides, A n th raq u in o n es T he secondary p ro d u ct p a tte rn s o f eleven Lasallia-species, L. asiae-orientalis A sah., L. bri-gantium (Zsch.) L lano, L. capensis (F rey) L lano, L. hispanica (Frey) S ancho & C respo, L. membranacea (L au r.) L lano, L. papulosa (A ch.) L lan o , L. pensylvanica (H offm .) L lano, L. pertusa (R ass.) L lano, L. pustulata (L.) M erat, L. rossica D om br. und L. sinensis Vej are investigated by hplc. In ad d itio n to g y ro p h o ric acid, lecanoric acid, um bilicaric acid, 7-chloroem odin, valsarin a n d skyrin, w hich were described before, hiascic acid an d ovoic acid were found by m eans o f h p lc-co ch ro m ato g rap h y , U V -a n d m ass spectrom etry and the reac­ tion o f hiascic acid w ith acetone. T he secondary p ro d u c t p a tte rn o f Lasallia-species is useful for system atic purposes. A key o f the species is provided. T he distrib u tio n o f secondary p ro d ­ ucts w ithin the thalli is discussed. 
  Reference    Z. Naturforsch. 46c, 19—2 (1991); received 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0019.pdf 
 Identifier    ZNC-1991-46c-0019 
 Volume    46 
4Author    RuiM S C M Orais, H. Ans BeckerRequires cookie*
 Title    Growth and Secondary Product Formation of in vitro Cultures from the Liverwort Reboulia hemisphaerica  
 Abstract    Pharm akogn o sie und A nalytische Phytochem ie, F R 12.3 der U n iv ersität des S aarlandes, D-6600 S aarbrücken, B undesrepublik D eutschland Z. N atu rfo rsch . 46c, 2 8 -3 2 (1991); received July 18/Septem ber 11, 1990 Reboulia hemisphaerica, L iverw ort, in vitro C u ltu re, S econdary P ro d u cts Reboulia hemisphaerica has been cultivated on G a m b o rg B5 m edium w ith various sugars. D ifferentiated cultures grew best on ag a r m edium w ith the a d d itio n o f 0.5% sucrose and a light regime o f 18 h light/6 h d ark . C allus w as induced eith er by a co m b in atio n o f p h y to h o r­ m ones (2 mg/1 a-n ap h th y lacetic acid + 1 mg/1 k inetin) o r by 4% glucose. T he differentiated cultures on a g ar produced sesquiterpenes in a tenfold increased a m o u n t co m p ared to u ndiffer­ entiated suspension cultures. C u ltu res k ept in d a rk p ro d u ced no sesquiterpenes, but 5-hydroxy-7,8,4'-trim ethoxyflavone w as present w hereas apigenin-7,4'-dim ethylether w as the only flavonoid in cultures cultivated in th e light. 
  Reference    Z. Naturforsch. 46c, 28 (1991) 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0028.pdf 
 Identifier    ZNC-1991-46c-0028 
 Volume    46 
5Author    Vera Schubert, R. Enate, D. Iener, A. Rm, M. OsandlRequires cookie*
 Title    Enantioselective Multidimensional Gas Chromatography of Some Secondary Alcohols and Their Acetates from Banana  
 Abstract    ittelchem ie, U n iv ersität F ra n k fu rt, R obert-M ayer-S traße 7 -9 , D-6000 F ra n k fu rt/M a in . B undesrepublik D eutschland Z. N aturforsch. 46c, 3 3 -3 6 (1991); received O cto b er 12, 1990 B anana, C hiral Flavo u r C o m p o u n d s, Secondary A lcohols, A cetic Acid Esters o f Secondary A lcohols, Enantioselective M D G C U sing enantioselective M D G C the en an tio m eric d istrib u tio n o f alkan-(alken-)2-yl-acetates from ban an as is achieved. A fter simple acety latio n their co rresp o n d in g alcohols 2-pentanol, 2-hexanol, 2-heptanol an d (Z)-4-hepten-2-ol respectively are also exactly stereodifferentiated by the sam e m ethod. All com p ounds investigated -esters as well as alcohols -exhibit a rem ark ab le excess o f the (5)-enantiom ers. 
  Reference    Z. Naturforsch. 46c, 33 (1991) 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0033.pdf 
 Identifier    ZNC-1991-46c-0033 
 Volume    46 
6Author    Requires cookie*
 Title    UV Radiation Dependent Flavonoid Accumulation of Cistus laurifolius L  
 Abstract    T hom as Vogt, P aul-G erhard G ülz, and H an s Reznik Botanisches Institut der U n iversität zu K öln, G y rh o fstra ß e 15, D-5000 K öln 41, B undesrepublik D eutschland Z. N aturforsch. 46c, 3 7 -4 2 (1991); received July 9 /O cto b er 16, 1990 Cistus laurifolius, Flavonoids, U V -A R ad iatio n E picuticular and in tracellular flavonoids o f C istus laurifolius grow n w ith and w ith o u t UV rad iatio n in a p h ytotro n as well as under n a tu ra l garden co n d ition s in the field were studied. The am o u n t o f intracellular flavonoid glycosides o f leaves receiving U V -A rad iatio n was two fold higher than that m easured in the absence o f U V -A rad iatio n , w h eth er grow n in the p h y to ­ tron o r in the field. Exposure o f previously pro tected leaves to U V -A rad iatio n increased the intracellular flavonoid glycoside co n ten t to th a t o f u n p ro tected leaves. T he q u alitative co m ­ position o f intracellular flavonoid glycosides show ed a reduced am o u n t o f quercetin-3-galactoside to the m yricetin m onosides w hen the leaves were grow n w ith o u t U V-A rad iatio n in the field and in the p h y to tro n . E p icuticular flavonoid aglycones were n o t influenced by UV rad iatio n significantly. 
  Reference    Z. Naturforsch. 46c, 37 (1991) 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0037.pdf 
 Identifier    ZNC-1991-46c-0037 
 Volume    46 
7Author    Requires cookie*
 Title    Elicitor-Induced Formation of Pterocarpan Phytoalexins in Chickpea (Cicer arietinum L.) Cell Suspension Cultures from Constitutive Isoflavone Conjugates upon Inhibition of Phenylalanine Ammonia Lyase  
 Abstract    U lrike M ack en b ro ck an d W olfgang Barz 
  Reference    Z. Naturforsch. 46c, 43 (1991) 
  Published    1991 
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 Identifier    ZNC-1991-46c-0043 
 Volume    46 
8Author    Raim Und Tenhaken, Wolfgang BarzRequires cookie*
 Title    Characterization of Pectic Enzymes from the Chickpea Pathogen Ascochyta rabiei  
 Abstract    Polygalacturonase, Pectin M etabolism, A scochyta rabiei, Chickpea The chickpea pathogenic fungus A scochyta rabiei when growing in a pectin containing m in­ eral medium secretes an exo-polygalacturonase (PG) and a pectin methyl esterase into the cul­ ture medium. The induction o f the PG is controlled by catabolite repression. The PG was puri­ fied to apparent hom ogeneity from the culture fluid by acetone precipitation and chrom ato­ graphy on a M ono S and a M ono Q column. The molecular weight o f the purified glycoprotein enzyme in SD S-PAG E was about 70 kD a, whereas the M r by gelfiltration it was estimated to be 53 kDa. Polygalacturonic acid is the only substrate o f the PG whereas pectin is not degraded. The PG releases only galacturonic acid from polygalacturonic acid and no oli-go-galacturonides which might elicitate chickpea plants and trigger plant defense response. The enzyme is not inhibited by pectin, the released proteins or phenolics. 
  Reference    Z. Naturforsch. 46c, 51—57 (1991); received October 29 1990 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0051.pdf 
 Identifier    ZNC-1991-46c-0051 
 Volume    46 
9Author    W. Erner Gunia, W. Alter Hinderer, U. Ta, W. Ittkam Pf, Wolfgang BarzRequires cookie*
 Title    Elicitor Induction of Cytochrome P-450 Monooxygenases in Cell Suspension Cultures of Chickpea (Cicer arietinum L.) and Their Involvement in Pterocarpan Phytoalexin Biosynthesis  
 Abstract    A yeast glucan elicitor causes the accumulation o f the pterocarpan phytoalexins medicarpin and maackiain in chickpea (Cicer arietinum) cell suspension cultures established from seeds. A cell culture line from a chickpea cultivar resistant against its main fungal pathogen Asco-chyta rabiei accumulates large amounts (944 nm ol/g fr. w t.) whereas a cell culture line from a susceptible cultivar accumulates only low amounts (38 nm ol/g fr. wt.) o f the phytoalexins. This is consistent with differential accumulation o f pterocarpan phytoalexins in intact plants [1], The first reactions in the pterocarpan-specific branch o f biosynthesis are hydroxylation o f the isoflavone intermediate form ononetin in position 2' or 3', catalyzed by microsomal cyto­ chrome P-450 monooxygenases. U pon elicitation form ononetin 2'-hydroxylase undergoes a strong transient induction in the cell suspension culture o f the resistant cultivar, whereas in the cell culture from the susceptible cultivar it is only slightly induced. In both cell suspension cul­ tures the induction o f cinnamic acid 4-hydroxylase and o f form ononetin 3'-hydroxylase does not show a clear correlation with phytoalexin accumulation. Experiments with different elici­ tor concentrations confirm that form ononetin 2'-hydroxylase is much more induced in cell cul­ tures from the resistant cultivar than from the susceptible one. It is concluded that the massive difference in phytoalexin accumulation between cell suspension cultures from the resistant and susceptible cultivar is determined mainly by the differential induction o f form ononetin 2'-hydroxylase activity. 
  Reference    Z. Naturforsch. 46c, 58—6 (1991); received October 29 1990 
  Published    1991 
  Keywords    Cicer arietinum, Yeast Elicitor, Cytochrome P-450 M onooxygenases, Pterocarpan Phytoalexins, M icrosomes 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0058.pdf 
 Identifier    ZNC-1991-46c-0058 
 Volume    46 
10Author    H. Artm, UtB. Stegmann, Paul Schuler, Hans-J Ruff, M. Knollmüller, W. LorethRequires cookie*
 Title    Ascorbic Acid as Indicator of Damage to Forest. A Correlation with Air Quality  
 Abstract    Damage to Forest, Ascorbic Acid Radical, Air Pollutants, EPR in vivo EPR investigations o f spruce needles under in vivo conditions are capable o f the detection o f several radicals attributed to the plant photosystem . Furthermore, at room temperature an absorption due to ascorbic acid radical and other paramagnetic oxidation products can be de­ tected additionally in the dark-adapted needles as well as under illumination. A systematic in­ vestigation o f the ascorbic acid signal intensity in spruce needles grown in the vicinity o f air quality control units indicates two different oxidative mechanisms, depending on the state o f illumination. Ozone plays a key role but is not the hazardous agent monitored by the ascorbic radical immediately. However, its signal reflects the present state o f the antioxidative system in the needles and provides an early and simple diagnosis o f the oxidative interactions o f air pol­ lutants with the photosynthetic apparatus o f big trees. 
  Reference    Z. Naturforsch. 46c, 67—7 (1991); received July 11/N ovem ber 2 1990 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0067.pdf 
 Identifier    ZNC-1991-46c-0067 
 Volume    46 
11Author    Susanne Bickel-Sandkötter, K. Ordula Esser, M. Artina, H. OrbachRequires cookie*
 Title    On the Accessibility of Essential Tyrosines in Isolated and Activated Chloroplast H +-ATPase  
 Abstract    The addition o f 7-chloro-4-nitrobenzofurazan to isolated and activated CF, creates a com ­ pletely changed binding stoichiometry and subunit-distribution o f bound modifier in contrast to the binding pattern in not-activated CF,. The activation o f CF, by dithiothreitol and heat results in the accessibility o f three additional tyrosines in ß-subunits and one additional tyro­ sine in a-subunits. Binding o f pyridoxalphosphate to lysine in the active state suppresses the accessibility o f the additional tyrosines, suggesting that PLP inactivates the ATPase by induc­ ing a conformational change. Furthermore, two N BD -m olecules are bound to y-subunits when CF, is activated. These two molecules may be bound to sulfhydryl groups o f cysteines which become accessible to N B D after activation. 
  Reference    Z. Naturforsch. 46c, 71—78 (1991); received September 7 1990 
  Published    1991 
  Keywords    ATP-Hydrolysis, ATPase, Chloroplast, Covalent M odification, Subunit Labeling 
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 Identifier    ZNC-1991-46c-0071 
 Volume    46 
12Author    GabrieleG. Ünther, Henrik LaaschRequires cookie*
 Title    Local Anesthetic Binding to Thylakoid Membranes. Relation to Inhibition of Light-Induced Membrane Energization and Photophosphorylation  
 Abstract    The association o f the lipophilic tertiary amine and local anesthetic dibucaine with osm oti-cally shocked chloroplasts o f Spinacia oleracea L. cv. M onatol was investigated. Dibucaine, known as an effective inhibitor o f thylakoid membrane energization and A TP synthesis, ex­ hibited three distinct binding classes with chloroplasts: partitioning in the lipid phase o f the membranes, electrostatic screening o f negative electrical charges on the thylakoid surface and light-induced association o f an as yet unknown nature. Evidence is presented that the mecha­ nism o f inhibition o f the transthylakoid pH gradient, ApH, by dibucaine is distinct from 'clas­ sical' amine-type uncoupling: The inhibitory effect o f dibucaine on ApH was independent o f the initial strength o f ApH. Light-induced dibucaine binding was independent o f the volum e o f the intrathylakoid space and o f the strength o f ApH as varied by medium pH. Judged from a comparison o f the data on dibucaine binding and on inhibition o f ApH and photophosphory­ lation, dibucaine bound via partitioning in the membrane lipid phase is responsible for the un-coupler-like effects o f the local anesthetic. A mechanism for the inhibition o f thylakoid energi­ zation by local anesthetic amines is discussed. 
  Reference    Z. Naturforsch. 46c, 79—8 (1991); received September 21 1990 
  Published    1991 
  Keywords    Chloroplast, Local Anesthetic, Dibucaine, Uncoupling, Photophosphorylation, Amine Bind­ ing 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0079.pdf 
 Identifier    ZNC-1991-46c-0079 
 Volume    46 
13Author    S. C. Sabat, V. Vijayavergiya, B. C. Tripathy, PrasannaM. OhantyRequires cookie*
 Title    Inhibitory Effect of Crown Compound on Photoelectron Transport Activity of Beet Spinach Thylakoid Membranes  
 Abstract    The effect o f K-picrate-18-crown-6 (crown) on the photoelectron transport activity o f beet spinach thylakoid membranes was investigated. A ddition o f micromolar concentration o f crown to thylakoid preparation inhibited p-benzoquinone, chloride-indophenol, methyl violo-gen supported Hill activities maximally by 75 per cent in a concentration dependent manner. However, the photosystem I catalyzed reaction remained insensitive to crown suggesting that crown specifically inhibits photosystem II electron transport. Addition o f exogenous electron donors like hydroxylamine or diphenylcarbazide failed to restore the crown induced inhibition o f photosystem II electron transport and lowering o f steady state chlorophyll a fluorescence yield. These observations suggest that crown also inhibits photosystem II catalyzed electron transport after the donation sites o f these exogenous donors. Washing o f the crown pre-treat-ed thylakoids with isolation buffer, relieved the crown inhibited electron transport activity, indicating that this inhibition is reversible. Furthermore, in hydroxylamine washed thylakoids which are devoid o f 0 2 evolution capacity, the hydroxylamine induced increase in chlorophyll a fluorescence o f variable yield was quenched by the addition o f crown. These observations suggest that crown affects the oxygen evolution and inhibits at a site close to photosystem II reaction centres. 
  Reference    Z. Naturforsch. 46c, 87 (1991); received August 14 1990 
  Published    1991 
  Keywords    Crown-Ether, Electron Transport, Photosystem II, Thylakoids, Beet Spinach ( Beta vulgaris) 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0087.pdf 
 Identifier    ZNC-1991-46c-0087 
 Volume    46 
14Author    HelenG M Cfaddena, DonaldC. Craigb, JohnL H Uppatza, JohnN. Phillips1Requires cookie*
 Title    X-Ray Structure Analysis of a Cyanoacrylate Inhibitor of Photosystem II Electron Transport  
 Abstract    X-Ray Structure, Cyanoacrylate, Photosystem II Inhibitor, Hill Inhibitor X-ray crystallographic data for the highly potent cyanoacrylate photosynthetic electron transport inhibitor, (Z)-ethoxyethyl 3-(4-chlorobenzylam ino)-2-cyano-4-m ethylpent-2-enoate, are presented. This com pound has a particularly high affinity for the photosystem II (PS II) herbicide receptor with a p /50 value o f 9.5 (in the Hill reaction under uncoupled condi­ tions with a chlorophyll concentration o f 0.1 |ig/m l). Data regarding the structure o f small li­ gands, such as this potent cyanoacrylate, which bind to the site with high affinity may be used to provide the basis for m odelling studies o f PS II/herbicide complexes. The X-ray data presented confirm the Z-stereochemistry o f active cyanoacrylates and demonstrate the pres­ ence o f a planar core stabilized by an intramolecular hydrogen bond between the ester car­ bonyl oxygen and a benzylamino hydrogen atom. In order to assess the importance o f the ben-zylamino -N H -group in this type o f cyanoacrylate, analogues containing a methylene group in its place were synthesized and found to be 100-and 1000-fold less active as Hill inhibitors. 
  Reference    Z. Naturforsch. 46c, 93—9 (1991); received August 21 1990 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0093.pdf 
 Identifier    ZNC-1991-46c-0093 
 Volume    46 
15Author    I. Agalidis, E. Rivasb, F. Reiss-HussonaRequires cookie*
 Title    Characterization of Reaction Center-B875 Complex of Rhodocyclus gelatinosus: Q B Site Properties Derived from Reconstitution Experiments  
 Abstract    Purified reaction center-B875 pigment-protein complex isolated from Rc. gelatinosus (I. Agalidis, E. Rivas, and F. Reiss-Husson, Photosynth. Res. 23, 2 4 9 -2 5 5 (1990)) was further characterized. In the chromatophores, the quinone content was shown to be 6 menaquinones 8 and 16 ubiquinones 8 per reaction center, indicating that the pool contained both quinone types. Besides the primary (M K S) and secondary (U Q X) electron acceptors o f the reaction cen­ ter, the com plex contains residual quinones from the membrane pool (about 3 M K X and 5 U Q 8) probably associated with the phospholipids. Apparent particle weight o f the complex including bound detergent was 520 ± 46 kDa. The secondary quinone Q B was partially removed from the RC by treatment with 2 -3 % octaethyleneglycol dodecyl ether and 3 —4 m M orthophenanthroline. Reconstitution experi­ ments showed that U Q 6, U Q 9 and U Q ,0 could replace Q B but that M K S and M K , could not. It was concluded that Q B site has a clear specificity towards ubiquinone binding. 
  Reference    Z. Naturforsch. 46c, 99—105 (1991); received October 10/November 26 1990 
  Published    1991 
  Keywords    Purple Bacteria, Reaction Center, Secondary Electron Acceptor, Quinones 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0099.pdf 
 Identifier    ZNC-1991-46c-0099 
 Volume    46 
16Author    M. Baier, W. HartungRequires cookie*
 Title    Cytoplasmic pH and Abscisic Acid Transport across Guard Cell Membranes  
 Abstract    The cytoplasmic pH value o f guard cells o f Valerianella locusta was determined from the distribution o f the weak acid [l4C]ABA between the medium and the cell, which was shown to be 8.1 ± 0.1. Treatment o f guard cells in media with low pH (pH 5.0) and different concentra­ tions o f sodium acetate (0 -5 m o lm '3) caused a considerable acidification o f the cytoplasm (6 .6 -7 .7). Using the compartmental analysis we determined also the fluxes o f ABA at the plas­ ma membrane o f guard cells (<I>co) and at the tonoplast o f guard cells (<t>cv) under steady state conditions. The flux o f ABA from the cytoplasm into the vacuoles (tonoplast flux) was de­ pendent upon the cytoplasmic pH. The data give evidence that A B A " is transported across the tonoplast by a saturable transport com ponent. The A BA flux at the plasma membrane seemed to be independent o f the cytoplasmic pH. 
  Reference    Z. Naturforsch. 46c, 106—110 (1991); received September 24 1990 
  Published    1991 
  Keywords    ABA Transport, Cytoplasmic pH, Guard Cells, Plasmamembrane, Tonoplast 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0106.pdf 
 Identifier    ZNC-1991-46c-0106 
 Volume    46 
17Author    W. Greenaway, J. May, T. Scaysbrook, F. R. WhatleyRequires cookie*
 Title    Identification by Gas Chromatography-Mass Spectrometry of 150 Compounds in Propolis  
 Abstract    Propolis was analyzed by gas chromatography-mass spectrometry for both its headspace volatiles and for the less volatile com ponents o f its alcoholic extract (propolis balsam). 181 peaks were located o f which 171 representing 150 compounds were identified, including 28 identified in propolis for the first time. The majority o f compounds were typical o f poplar bud exudate. 
  Reference    Z. Naturforsch. 46c, 111—121 (1991); received October 11 1990 
  Published    1991 
  Keywords    Propolis, Volatiles, Phenolic C om pounds, Poplar Bud Exudate, GC-MS 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0111.pdf 
 Identifier    ZNC-1991-46c-0111 
 Volume    46 
18Author    Jürgen JacobRequires cookie*
 Title    Composition of the Surface Lipids from the European Mole ( Talpa europaea)  
 Abstract    Z oologisches In stitu t u n d Z oologisches M useum U n iv ersität H am b u rg M artin -L u th er-K in g -P latz 3, D -2000 H am b u rg 13 and Udo Hoppe B eiersdorf A G , H am b u rg Z. N atu rfo rsch . 46c, 1 2 2 -126 (1991); received S eptem ber 2 0/N ovem ber 29, 1990 Surface Lipids, E u ro p ean M ole, B ranched F a tty A cids, B ranched A lcohols T he surface lipids o f the E u ro p ea n m ole consist o f squalene, m onoester waxes, triglycerides and cholesterol. As show n by G C /M S analysis, the fatty acid m oieties o f b oth m onoester waxes and triglycerides belong to satu ra te d u n b ran ch ed , (co-1)-an d (co-2)-m ethyl-substituted and u n satu rate d h o m ologous series. D ouble b o n d s are located at the 7/8-and 9/10-position. A p art from the cis-also trans-isom ers were found. T he alcohol moieties o f the m onoester waxes consisted o f sa tu ra te d u n b ran ch ed , (co-1)-an d (co-2)-m ethyl-substituted hom ologous se­ ries exclusively. 
  Reference    Z. Naturforsch. 46c, 122 (1991) 
  Published    1991 
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 Identifier    ZNC-1991-46c-0122 
 Volume    46 
19Author    Requires cookie*
 Title    * < ° f« 0 Cl  
 Abstract    Fig. 1. Chem ical structure o f octopam inergic insecti­ cides. 1. A C-6, 2. chlordim eform , 3. clonidine. 128 
  Reference    Z. Naturforsch. 46c, 127 (1991) 
  Published    1991 
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 Identifier    ZNC-1991-46c-0127 
 Volume    46 
20Author    M. Suwalsky, F. Neira, I. SánchezRequires cookie*
 Title    X-Ray Studies on Phospholipid Bilayers. X. Interactions with Chlortetracycline Hydrochloride  
 Abstract    D epartm ent o f C hem istry, U niversity o f C oncepcion, Casilla 3-C, C oncepcion, Chile Z. N aturforsch. 46c, 1 33-138 (1991); received M ay 31, 1990 X -R ay D iffraction, Phospholipid Bilayers, C h lortetracycline H y d ro ch lorid e T his study deals with the stru ctu ra l p e rtu rb a tio n s th a t the an tib io tic chlortetracycline hy­ drochloride (C T C) can produce on pho sp h o lip id bilayers. T w o m u ltibilayer systems, one built-up o f dim yristoylphosphatidylethanolam ine (D M P E) an d the o th e r o f dim yristoylphos-phatidylcholine (D M P C) were allow ed to in teract w ith different co n cen tra tio n s o f C TC in the absence and presence o f w ater. T he study was carried o u t by X -ray diffractio n m ethods an d all experim ents were done below the pho sp h o lip id m ain tran sitio n tem p eratu res. T he results show ed th a t C TC produced significant p e rtu rb a tio n s on D M P C even in the absence o f w ater, w hereas they were m uch m ilder in D M P E . 
  Reference    Z. Naturforsch. 46c, 133 (1991) 
  Published    1991 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0133.pdf 
 Identifier    ZNC-1991-46c-0133 
 Volume    46 
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