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Facet   Publication Year 1996  [X]
Facet   section ZfN Section C:Volume 051  [X]
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1996[X]
81Author    A. Nna-K, B. Arin, Org-K, RaimondasM. Arlsona, OzuraitisaRequires cookie*
 Title    Phyllonorycter sylvella Moths  
 Abstract    The SPM E (solid phase micro extraction) technique was used in the collection of volatiles released by calling females of the 4 -6 mm long tentiform leafminer moth Phyllonorycter sylvella (Lepidoptera, Gracillariidae). The volatiles released by the calling P. sylvella females were identified by GC-M S as a mixture of Z10-tetradecenyl acetate (9 2 %), £10-tetrad ecen yl acetate (2 %) and Z 8 -tetradecenyl acetate (6 %). The amount of volatiles released by one calling female during three hours and collected on a polydimethylsiloxane fibre, was as large as the amount extracted from the glands of 20 females. The SPM E technique gives the oppor­ tunity of continuously following the release of behaviour mediated signals from weak scented living organisms. 
  Reference    Z. Naturforsch. 51c, 599 (1996); received January 26/M arch 7 1996 
  Published    1996 
  Keywords    M oth, Calling Behaviour, Z10-Tetradecenyl A cetate, Pheromone, Solid Phase M icro Extraction 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0599.pdf 
 Identifier    ZNC-1996-51c-0599 
 Volume    51 
82Author    A. Bellossi3, V. Pouvreau-Quillienb, C. R. O Ch Er3, M. R. Uelloux3Requires cookie*
 Title    Effect of Pulsed Magnetic Fields on Cholesterol and Tryglyceride Levels in Rats Study of Field Intensity and Length of Exposure  
 Abstract    In a previous work a decrease in cholesterol and triglyceride plasma levels was observed in rats 24 hours after their exposure to a 12 Hz 6 mT pulsed magnetic field (P M F). This time, a study of intensity effects of a 12 Hz PM F for a sixty-minute exposure and of length of exposure for a 12 Hz 6 mT PM F took place. Non-linear effect-dose relationships were ob­ served for the PM F intensity as well as for the length of exposure used. The highest decreases in cholesterol and triglyceride levels were obtained after to a sixty-minute exposure with 1.5 mT and 12 mT. 
  Reference    Z. Naturforsch. 51c, 603 (1996); received M arch 25/M ay 8 1996 
  Published    1996 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0603.pdf 
 Identifier    ZNC-1996-51c-0603 
 Volume    51 
83Author    G. Erd GädeRequires cookie*
 Title    The Revolution in Insect Neuropeptides Illustrated by the Adipokinetic Hormone/Red Pigment-Concentrating Hormone Family of Peptides  
 Abstract    The last decade has seen a surge in the knowledge on primary structures of insect neuro­ peptides. Particularly successful were isolations and sequence determinations of more than 30 members of the adipokinetic horm one/red pigment-concentrating hormone (A K H /R P C H) family of peptides. This brief overview describes the techniques used to obtain data on purifi­ cation and structure such as high performance liquid chromatography, Edman sequencing and mass spectrometry. M oreover, a short account on the precursors and on the multiple functions of the peptides of the A K H /R P C H family in various crustacean and insect species is given. 
  Reference    Z. Naturforsch. 51c, 607 (1996); received April 8 /July 2 1996 
  Published    1996 
  Keywords    Insect Neuropeptides, R P -H P L C, Edm an Degradation, Mass Spectrometry, Bioassays 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0607.pdf 
 Identifier    ZNC-1996-51c-0607 
 Volume    51 
84Author    J. M. Prieto3, M.C R Ecio3, R.M G Iner3, S. M. Áñez3, A. M. Assm Anianb, P.G W Aterm An0, J.L R Íos3, Tuberculatin, DiphyllinAcetyl ApiosideRequires cookie*
 Title    Topical Anti-Inflammatory Lignans from Haplophyllum hispanicum Haplophyllum hispanicum. Rutaceae. Topical Anti-Inflam matory Activity, Lignans  
 Abstract    The present paper reports the results of the methanol extract of Haplophyllum hispanicum Spach on single or repeated local 12-O-tetradecanoylphorbol acetate (TPÄ) administration and in the oxazolone-induced contact-delayed hypersensitivity mouse ear edemas. Two topi­ cal anti-inflammatory aryl naphthalide lignans were isolated from the active fractions of the methanol extract. They were identified by spectroscopic methods, including 13C NMR and heteronuclear multiple bond correlation (H M B C), as diphyllin acetyl apioside and tubercu­ latin. The former was the most active on acute TPA edema with a ID 5 0 of 0.27 |a,mol/ear. 
  Reference    Z. Naturforsch. 51c, 618 (1996); received April 15/June 12 1996 
  Published    1996 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0618.pdf 
 Identifier    ZNC-1996-51c-0618 
 Volume    51 
85Author    D. Ietrich, Bäum Er, HansG. Eorg RuppelRequires cookie*
 Title    Phenolic Constituents of Galactites tomentosa (Asteraceae)  
 Abstract    The A steracea Galactites tomentosa. known as a plant causing allergic contact reactions, was investigated for new constituents in leaves and stems. Chlorogenic acid and 3,5-dicaf-feoylquinic acid could be detected by H P LC in tissues and trichome preparations as well. 
  Reference    Z. Naturforsch. 51c, 623 (1996); received May 31/June 20 1996 
  Published    1996 
  Keywords    Allergie Contact Reactions, Galactites tomentosa, Chlorogenic Acid, 3, 5-Dicaffeoylquinic Acid 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0623.pdf 
 Identifier    ZNC-1996-51c-0623 
 Volume    51 
86Author    I. Barelm, J.-MM. Eyerb, K. Taraz3, H. Budzikiewicz3Requires cookie*
 Title    Burkholderia (Pseudomonas) cepacia* *  
 Abstract    In addition to the known hydroxam ate siderophores ornibactin C6 and C8 a catecholate siderophore named cepaciachelin, l-N -[2-N ',6-N '-di(2,3-dihydroxybenzoyl)-L-lysyl]-l,4-dia-minobutane, was isolated from a Burkholderia (Pseudomonas) cepacia PHP7 culture and its structure elucidated by chemical degradation and spectroscopic methods. This is the first case of a member of the Pseudomonas group which cholate siderophores. 
  Reference    Z. Naturforsch. 51c, 627 (1996); received June 17/July 3 1996 
  Published    1996 
  Keywords    Burkholderia (Pseudomonas) cepacia, Cepaciachelin Ornibactin, Catecholate, Siderophore 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0627.pdf 
 Identifier    ZNC-1996-51c-0627 
 Volume    51 
87Author    M. Aya, IvM. Itova3, MinchoE. Anchevb, StefanG. Panev3, N. Edjalka, V. H. Andjieva3, Sim Eon, S. Popov3Requires cookie*
 Title    Coumarins and Iridoids from Crucianella graeca, Cruciata glabra, Cruciata laevipes and Cruciata pedemontana (Rubiaceae)  
 Abstract    The coumarin and iridoid composition of Crucianella graeca, Cruciata glabra, Cruciata laevipes and Cruciata pedemontana has been studied. Daphnin and daphnetin glucoside do­ minated in C. glabra along with low concentrations of daphnetin, deacetylasperulosidic acid and scandoside. In C. laevipes and C. pedemontana were found the same coumarin glucosides along with six iridoid glucosides. In Crucianella graeca were found ten iridoid glucosides. 
  Reference    Z. Naturforsch. 51c, 631 (1996); received May 23/July 8 1996 
  Published    1996 
  Keywords    Rubiaceae, Crucianella, Cruciata, Coumarins, Iridoids 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0631.pdf 
 Identifier    ZNC-1996-51c-0631 
 Volume    51 
88Author    HermanJ W Oerdenbag3, L. R. En Ee, L. U. Tkea, ReinB., JanF. Sa, Stevens3, Ron Hulstb, WimH. Kruizingab, You-Ping Zhuc, ElizabethT E Lem A3, Henk Hendriks3, Wim Van, U. Den3, Niesko Pras3Requires cookie*
 Title    Isolation of Two Cytotoxic Diterpenes from the Fern Pteris multifida  
 Abstract    From aerial parts of the fern Pteris multifida Poir. (Polypodiaceae) two diterpenes, ent-kaurane-2ß,16a-diol and e«f-kaur-16-ene-2ß,15a-diol, were isolated by repeated column chromatography using silica gel and silica gel impregnated with silver nitrate. The structures were confirmed by spectroscopic methods. Both compounds showed a moderate cytotoxicity to Ehrlich ascites tumour cells. 
  Reference    Z. Naturforsch. 51c, 635 (1996); received March 6 /M ay 28 1996 
  Published    1996 
  Keywords    Pteris multifida, Polypodiaceae, Ferns, £>zf-kaurane Diterpenes, Cytotoxic Activity 
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 Identifier    ZNC-1996-51c-0635 
 Volume    51 
89Author    N. G. RotjohannRequires cookie*
 Title    Regulation of Fructose 1,6-Bisphosphatase Activity of Chlorella by Mole Mass Change  
 Abstract    Fast protein liquid chromatography on Superose 6 of partially purified FBPase II from Chlorella reveals a 1350 kDa-form at pH 6.0 and a 67 kDa-form at pH 8.5. Treatment o f the large enzyme form with 5mM concentrations of Mg2+, F1,6P2, DTT or ATP leads to dissoci­ ation into smaller ones of 2 1 5 -4 7 0 kDa. Aggregation/dissoziation is a reversible process, as has been shown for the effect of F1,6P2 and of pH, by rechromatography. The change in m ole mass results in alterations of the activitiy and of the kinetic properties of the enzyme forms, obtained. Dissociation results in a 4 -6 fold increase in activity, as can be shown for F l,6 P2-treated samples. Halfsaturation constants, as well as the degree o f cooperativity of the 67-and the 1350-kDa form, are different for substrate affinity, activation by Mg2+ and DTT, and for inhibition by ATP. Both enzyme forms hydrolyse fructose 1,6 bisphosphate and seduheptulose 1,7 bis­ phosphate better than other phosphorylated compounds. The ratio o f F1,6P2-to SDP-cleav-age is 100:58 for the small enzym e form and 100: 84 for the large one. Activation of FBPase II in the light and inactivation in the dark is discussed on the basis of different oligomeric forms of the enzyme, generated by changes in the concentration of intermediates and effectors in the chloroplast stroma, leading to dissociation or aggregation. The conclusion is drawn that oligomerization of key enzymes, resulting in enzyme forms with different activities and different kinetic properties, might provide an effective mechanism for enzyme regulation in vivo. 
  Reference    Z. Naturforsch. 51c, 639 (1996); received September 14 1995/March 7 1996 
  Published    1996 
  Keywords    Chlorella, Fructosebisphosphatase, Oligomerization Activation Kinetic Properties 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0639.pdf 
 Identifier    ZNC-1996-51c-0639 
 Volume    51 
90Author    BlahoslavM. Aršálek, Renata RojíčkováRequires cookie*
 Title    Stress Factors Enhancing Production of Algal Exudates: a Potential Self-Protective Mechanism?  
 Abstract    Algae are known to produce extracellular organic substances under optimum conditions and increase their production under stress. The changes in amount and composition of extra­ cellular carbohydrates and proteins of three green algae Scenedesmus quadricauda, Chlorella kessleri and Raphidocelis subcapitata (known as Selenastrum capricornutum) were studied after a 5-days' cultivation under the influence of different types o f stress factors (osm otic, organic, and heavy metal stressors). NaCl enhanced the quantity of carbohydrates more than proteins. A higher increase o f proteins than carbohydrates was observed after addition of 3,5-dichlorophenol, glyphosate and cadmium chloride to algal cultures. The production of dissolved organic matter differs from species to species, with the age of a culture and the type of stressor. 
  Reference    Z. Naturforsch. 51c, 646 (1996); received May 28/June 25. 1996 
  Published    1996 
  Keywords    Algae, Extracellular Products, Proteins, Carbohydrates 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0646.pdf 
 Identifier    ZNC-1996-51c-0646 
 Volume    51 
91Author    Werner Meyer, G.Erhard SpitellerRequires cookie*
 Title    Increase of Caryophyllene Oxide in Ageing Lemon Balm Leaves (Melissa officinalis L.) -A Consequence of Lipid Peroxidation?  
 Abstract    Oxidative processes, especially lipid peroxidation (LPO), are assumed to increase during ageing. In an attempt to provide experimental evidence for this assumption lemon balm plants (Melissa officinalis L.) of different age and location were analyzed for oxidatively caused changes in the etheric oil composition. The investigation revealed that the caryophyl­ lene oxide (CarO) content of lemon balm plants -a main constituent -depends on two factors: age and habitat. The content of CarO increased with age continuously up to a factor of 3. Poor nutritive conditions, as growth on unfertilized soil, also caused an increase in CarO content. Addition of Fe2+/ascorbate -enhancing oxidative processes -promoted the formation of CarO. Hydroperoxides of unsaturated fatty acids (L O O H s) in the lipid extract of lemon balm leaves were converted to corresponding hydroxy acids (LO H s) by sodium borohydride re­ duction. These were hydrogenated and subjected to GC/MS analysis after derivatisation. A surplus of 9-hydroxy-octadecanoic acid over the 13 isomer indicated at least in part enzymatic lipid peroxidation. Polarographie determination o f the oxygen consumption revealed a gen­ erally low but in ageing plants increased lipoxygenase activity. This indicates a contribution of lipid peroxidation in the epoxidation process of caryophyllene. 
  Reference    Z. Naturforsch. 51c, 651 (1996); received May 17/June 12 1996 
  Published    1996 
  Keywords    Melissa officinalis, Lemon Balm, Caryophyllene Oxide, Lipid Peroxidation, Lipoxygenase Activity, Ageing 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0651.pdf 
 Identifier    ZNC-1996-51c-0651 
 Volume    51 
92Author    Gerold Reila, RalfG. Ünter BergerhRequires cookie*
 Title    Accumulation of Chlorophyll and Essential Oils in Photomixotrophic Cell Cultures of Citrus sp  
 Abstract    Heterotrophically or photomixotrophically initiated callus cultures o f Citrus paradisi, C. limon and C.aurantifolia were grown on different nutrient media and under different light regimes. Calli of C.paradisi that contained > 1 4 0 mg chlorophyll per kg wet weight accumu­ lated about 40 volatile mono-and sesquiterpene hydrocarbons, oxigenated terpenes and ali­ phatic aldehydes. Upon five subcultivations the best yielding callus contained about 5% (186 mg x k g 1 wet wt) of the volatiles found in peel tissue (exo/m esocarp section), and about the twentyfold amount of that found in the fleshy endocarp. The com position of the essential oils from most of the cell cultures equalled grapefruit peel oil, but was shifted to a more fruit flesh-like composition, after the concentration of gellan gum in the medium was increased from 3 to 9 g per L. C. limon produced 11 m onoterpenes and n-nonanal (40 mg x kg"1 wet wt max.), and C.aurantifolia yielded limonene only (4.4 mg x kg'1 wet wt max.). For all of the indicated species chlorophyll content and accumulation of volatiles were positively corre­ lated. Addition of exogenous valencene to suspended cells of C.paradisi led to a stable con­ centration of the conversion product nootkatone. This stably maintained level suggested that a decreased catabolism of available carbon sources might have accounted for the significant accumulation of essential oil constituents. 
  Reference    Z. Naturforsch. 51c, 657—6 (1996); received March 12/June 18 1996 
  Published    1996 
  Keywords    Citrus, Cell Culture, Photomixotrophy, Oligoprenoids, Limonene 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0657.pdf 
 Identifier    ZNC-1996-51c-0657 
 Volume    51 
93Author    Koshi Saito, Yoshifumi UtsumiRequires cookie*
 Title    Enhancing Effect of UV-Light on the Accumulation of Carthamine in Dyer's Saffron Florets  
 Abstract    Dyer's Saffron (Carthamus tinctorius), Carthamine Accumulation. UV-Light, Enhancing Effect UV-C (254 nm)-and U V-B (2 8 0 -3 2 0 nm)-light were irradiated onto bright-yellow capitula of dyer's saffron and their effects on carthamine accumulation compared. UV-C light pro­ m otes reddening of florets more prominently than UV-B light, yielding higher amounts of carthamine after the radiation process. The enhancement of carthamine synthesis by UV-C light was investigated on cellulose columns loaded with floret extracts under 0 2-sufficient or 0 2-deficient conditions. Externally charged 0 2 inhibits the UV-C-stimulated carthamine formation. The results are discussed in relation to light stimulation of carthamine synthesis in dyer's saffron florets. 
  Reference    Z. Naturforsch. 51c, 667—6 (1996); received March ll/Ju n e 6 1996 
  Published    1996 
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 Identifier    ZNC-1996-51c-0667 
 Volume    51 
94Author    Pedro Cuadra2, JeffreyB H ArbornebRequires cookie*
 Title    Changes in Epicuticular Flavonoids and Photosynthetic Pigments as a Plant Response to UV-B Radiation  
 Abstract    Treatment of Gnaphalium vira-vira plants with UV-B radiation caused changes in plant growth and in plant chemistry. The leaf surface contained two O-methylated flavones, araneol and 7-O-methylaraneol. HPLC analysis showed that 20 days of UV-B radiation increased the synthesis of 7-O-methylaraneol at the expense of araneol. Spectrophotometric analysis of the photosynthetic pigments showed that UV-B radiation also increases the pigment content in treated plants. A nother U V alteration is epidermal hair damage, as observed in SEM pictures of treated leaves. This combination o f physiological and phytochemical effects may be interpreted as a plant response to UV-B stress. 
  Reference    Z. Naturforsch. 51c, 671 (1996); received April 29/June 10 1996 
  Published    1996 
  Keywords    Gnaphalium vira-vira, Compositae, Epicuticular Flavonoids, Lipophilic Flavones, U V-B Radiation 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0671.pdf 
 Identifier    ZNC-1996-51c-0671 
 Volume    51 
95Author    Klaus Schiwinsky3, WolfgangG. Rosseb, Dietrich Woermann3-Requires cookie*
 Title    Convective Gas Flow in Plant Aeration and Graham's Law of Diffusion  
 Abstract    D edicated to Professor L udw ig Bergmann (K öln) on the occasion o f his 70th birthday Plant Aeration, Convective Gas Flow, N ym phaea alba L., Leaves, Graham's Law of diffusion Experiments with porous ceramic membranes and leaves of N ymphaea alba L. are d e­ scribed which demonstrate that the counter diffusion of gaseous components of different molar mass governed by Graham's law o f diffusion (not to be confused with Graham's law of effusion) has to be taken into account to understand the exchange processes of gases between leaves of aquatic and amphibic plants and the outer atmosphere. The experiments are carried out under conditions under which the ratio of the maximum pore size r of the ceramic material to the mean free path length A . of the m olecules in air has a value o f the order of XIr ~ 1. 
  Reference    Z. Naturforsch. 51c, 681 (1996); received April 18/June 26 1996 
  Published    1996 
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 Identifier    ZNC-1996-51c-0681 
 Volume    51 
96Author    G. H. Schmida, A. R. Adunz3, K.P B Ader3, B. Myśliwa-Kurdzielb, K. Strzał, J. KrukbRequires cookie*
 Title    Action of an Antiserum to a-Tocoquinone on Photosystem II-Particle Preparations of N icotiana tabacum  
 Abstract    An antiserum to a-tocoquinone was prepared by immunization of rabbits. Immunization was obtained by injection of a conjugate consisting of the hapten a-tocoquinone attached to methylated ovalbumin into the rabbit. The antiserum recognizes the 3,4-dimethyl-p-benzo-quinone group of the m olecule as well as part of the immediate vicinity to the side chain. This is concluded from the fact that the antibody has som e affinity also to plastoquinone. No reaction of the antibody is observed with a-tocopherol hydroquinone or a-tocopherol. Reac­ tion of the antiserum to a-tocoquinone with photosystem Il-particle preparations from to­ bacco affects the functionality of the preparation. Chlorophylla-fluorescence emission is quenched without an alteration of the em ission spectrum. Concomitant with this fluorescence quenching, the lifetime of two fluorescence com ponents namely that of a fast and a slower component are shortened. By analogy with the literature the fast component is associated with chlorophylla of the reaction center core and that of the slow com ponent with the antenna system in which the lifetime parameter is shortened by the antibody from 3.42 ns to 1.795 ns. The action on the fast component is less and leads to a shortening of the lifetime parame­ ter from 0.373 ns to only 0.249 ns. The effect is interpreted in terms of an enhancement of linear photosynthetic electron transport possibly due to an inhibition of the cyclic electron transport around PS II, discovered by Gruszecki et al. 
  Reference    Z. Naturforsch. 51c, 691—6 (1996); received May 14/July 17 1996 
  Published    1996 
  Keywords    Antiserum, a-Tocoquinone, Photosystem II, Fluorescence Lifetime, Nicotiana tabacum 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0691.pdf 
 Identifier    ZNC-1996-51c-0691 
 Volume    51 
97Author    D. Onald, E. M. O Relan D, T. Hom, J. Fleischm, FrederickT C Orbina, JanisE M CfarlandbRequires cookie*
 Title    Differential Metabolism of the Sulfonylurea Herbicide Prosulfuron (CGA-152005) by Plant Microsomes  
 Abstract    Microsomes isolated from excised shoots of 3-day-old. dark grown, grain sorghum [Sor­ ghum bicolor (L.) Moench, Funk G522DR and DK 41Y] and corn seedlings [Zea mays (L.), Pioneer 3245] metabolized the sulfonylurea herbicide prosulfuron (CGA-152005). Corn microsomes predominantly formed a single major metabolite that resulted from hydroxyla-tion of the phenyl ring at the C5 position. However, sorghum microsomes formed two major metabolites in an approximate 1:1 ratio. One was the 5-hydroxyphenyl metabolite, whereas the second metabolite resulted from ö-demethylation at C4 of the triazine ring. Metabolite identity was established by mass spectrometry and co-chromatography with authentic stan­ dards. Metabolism in both corn and sorghum was greatly enhanced by pretreatment of the seed with naphthalic anhydride and by subirrigation with 2.5% ethanol 24 h prior to harvest. Metabolism required a reduced pyridine nucleotide and was affected by several cytochrome P450 monooxygenase inhibitors (carbon monoxide, tetcyclacis, piperonyl butoxide, 1 amino-benzotriazole, and SKF-525A). The inhibitors differentially affected metabolism of prosul­ furon. Microsomal oxidations from both untreated and inducer-treated tissue responded simi­ larly to the inhibitors. In exploratory studies, microsomes isolated from shoots of wheat [Triticum aestivum L., Pioneer 2548], barley [Hordeum vulgare L., Boone], oats [Avena sativa L., Southern States 76-30-P242] and rice [Oryza sativa L" Gulfmont], and room ripened avocado [Persea americana, Mill., Hass] mesocarp tissue also primarily formed the 5-hydroxy-phenyl metabolite. Titration of seven different avocado microsomal preparations with prosul­ furon provided typical type I difference spectra from which an average binding constant (/Cs) of 187 ± 35 [.im was obtained. Abbreviations: 1-ABT, 1-aminobenzotriazole; alachlor, 2-chloro-.'V-(2.6diethylphenyl)-/V-(methoxymethyl)acet-amide; ALS, acetolactate synthase; CG A 24704, 2-chloro-N-(2,6-dimethylphenyl)-/V-(2-methoxy-l-methylethyl)acet-amide; CGA-150829. 2-amino-4-methoxy-6-methyl-l,3,5-triazine; CGA-152005, prosulfuron, N-[[(4-methoxy-6-methyl-l,3,5-triazin-2-yl) amino]carbonyl]-2-(3,3,3-trifluoropropyl)benzenesulfonamide; CGA -l59902, 2-(3,3,3-tri-fluoropropyl)benzenesulfonamide; CGA-300406, 0-desmethyl prosulfuron, N[[(4-hydroxy-6-methyl-l,3,5-triazin-2-yl)amino]carbonyl]-2-(3,3,3-trifluoropropyl)benzenesulfonamide; CGA-300408, 5-hydroxy prosulfuron, N-[[(4me-thoxy-6-methyl-l,3,5-triazin-2-yl)amino]carbonyl]-2-(3,3,3-trifluoropropyI)-5-hydroxybenzenesulfonamide; chlorsul-furon, l-(2-chlorophenylsulfonyl)-3-(4-methoxy-6-methyl-l,3.5-triazin-2-yl)urea; pCMA, /?-chloro-./V-methylaniline: DMA, /V,/V-dimethylaniline; DMSO. dimethyl sulfoxide; DTT, dithiothreitol; G6P. glucose-6-phosphate; HPLC, high-performance liquid chromatography; LC/ESI/MS. liquid chromatography/ electrospray ionization/mass spectrome­ try; metolachlor, 2-chloro-/V-(2-ethyl-6-methylphenyl)-/V-(2-methoxy-l-methylethyl)acetamide; NA. 1,8-naphthalic anhydride; nicosulfuron, 2-[[(4.6-dimethoxypyrimidin-2-yl)aminocarbonyl]aminosulfonyl]-./V,/V-dimethyl-3-pyridinec-arboxamide; PBO. piperonyl butoxide; primisulfuron. 2-[[[[[4.6-bis(difluoromethoxy)-2pyrimidinyl]amino]carbony-l]amino]sulfonyl]benzoic acid: PVPP. polyvinylpolypyrrolidone; SKF-525A. 2-(diethylamino)ethyl-2.2-diphenylpen-tanoate; tetcyclacis, 5-(4-chlorophenyl)-3,4.5.9,10-pentaazatetracyclo[5.4.102-6,0811] dodeca-3.9-diene; TLC. thin layer chromatography: triasulfuron, l-(2-chloroethoxyphenylsulfonyl)-3-(6-methoxy-4-methyl-l,3.5-triazin-2-yl)urea. Reprint requests to Dr. D. E. Moreland. Telefax: (001) 919-515-7959. 0939-5075/96/0900-0698 $ 06.00 © 1996 Verlag der Zeitschrift für Naturforschung. All rights reserved. D D. E. Moreland et al. ■ M etabolism of Prosulfuron by Plant Microsomes 699 
  Reference    Z. Naturforsch. 51c, 698—710 (1996); received May 14/June 17 1996 
  Published    1996 
  Keywords    Microsomes, Prosulfuron, Cytochrome P450, Mixed Function Oxidases, Herbicide Metabolism 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0698.pdf 
 Identifier    ZNC-1996-51c-0698 
 Volume    51 
98Author    FrancineT. Huillier-B, RegisC. Ruston, E. Alvayrac, D. Velyne, UvalRequires cookie*
 Title    Partial Molecular Analysis of the psbA Gene in Euglena gracilis Mutants Exhibiting Resistance to DCM U and Atrazine  
 Abstract    Euglena gracilis, p sb A G en e, D l P rotein , D C M U R esistan ce, A trazine R esistance M utations conferring herbicide resistance have b een d etected in tw o new strains (Z R 250 
  Reference    Z. Naturforsch. 51c, 711 (1996); received A pril 10/June 27 1996 
  Published    1996 
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 Identifier    ZNC-1996-51c-0711 
 Volume    51 
99Author    KlausP B Ad Er, Judith SchülerRequires cookie*
 Title    Inhibition of the Photosynthetic Electron Transport by Pyrethroid Insecticides in Cell Cultures and Thylakoid Suspensions from Higher Plants  
 Abstract    Synthetic pyrethroid insecticides with different molecular structures have been investigated with respect to their effect on photosynthetic electron transport reactions in chloroplast sus­ pensions and cell cultures from higher plants. The fluorescence induction curves of tobacco (Nicotiana tabacum) leaves and tomato cells were substantially affected by permethrin and cypermethrin resulting in a strong increase of the maximum fluorescence. Application of different concentrations (0.3-1.2 m M) of the respective chemical abolishes virtually any ki­ netics of the normal Kautsky effect. Oxygen evolution from cell cultures from tomato (Ly-copersicon peruvianum) was completely inhibited by cypermethrin. Analysis of partial reac­ tions of the photosynthetic electron transport showed that both a methylviologen-mediated Mehler reaction and a ferricyanide-driven Hill reaction were quantitatively inhibited by e.g. fenvalerate. On the other hand, neither a silicomolybdate-driven Hill reaction nor a methylvi-ologen-driven Mehler reaction using dichlorophenol indophenol/ascorbate as electron donors could be inhibited by the pyrethroid. The analyses suggest that pyrethroid insecticides in­ terfere with the photosynthetic electron transport at the same site as urea-type herbicides do. Depending on the molecular structure and on the halogen compound in the molecule, however, different pyrethroids are more or less phytotoxic to the investigated photosynthetic membranes -cypermethrin with two Cl-substituents requires much higher concentrations to be applied for significant inhibition of the electron transport reactions than the Br-derivative deltamethrin does. Moreover, qualitative differences have to be taken into account. In the case of fenvalerate the effect seems to exist in a type of all-or-nothing reaction when the reaction centres are inhibited by the pyrethroid. None of the S-states nor the transition probabilities are specifically influenced by increasing concentrations of fenvalerate. In the case of deltamethrin, however, it was found that the overreduced state S_i is significantly increased at the expense of both Si and S(). Moreover, the miss parameter a is increased in the case of deltamethrin addition. The results and the significance of different substituents for the investigated pyrethroids are discussed. 
  Reference    Z. Naturforsch. 51c, 721—728 (1996); received April 25/June 20 1996 
  Published    1996 
  Keywords    Photosynthesis, Electron Transport, Oxygen Evolution, Pyrethroid Insecticide, Cell Culture 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0721.pdf 
 Identifier    ZNC-1996-51c-0721 
 Volume    51 
100Author    B. Eatrice, K. Rekeler, R. Olf, B. EiderbeckRequires cookie*
 Title    Aseptic Dual Culture of the Aphid Chaitophorus salijaponicus with Different Tissues of Salix Hosts  
 Abstract    The apterous generation of the viviparous aphid Chaitophorus salijaponicus was propa­ gated aseptically on in vitro cultures of host shoots for more than 34 passages and 17 months. On the best suited host (Salix alba) a single nymph yielded a colony of 126.3 ± 24.4 individ­ uals within 4 weeks. Other tissues than normal host shoots (callus, root cultures, fasciated shoots) did not support aphid propagation. Aphid colony development accelerated the senes­ cence of host shoots and severely inhibited the development of adventitious root systems. The aspects of insect surface sterility, aphid colony development and its influence on the host are discussed. 
  Reference    Z. Naturforsch. 51c, 729—734 (1996); received April 19/June 24 1996 
  Published    1996 
  Keywords    Salix alba, Chaitophorus salijaponicus, Dual Culture, Aphid Propagation, Plant Growth 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0729.pdf 
 Identifier    ZNC-1996-51c-0729 
 Volume    51 
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