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'Anthraquinones' in keywords
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1Author    GeorgeP. Demagos, Wolfgang Baltus, Gerhard HöfleRequires cookie*
 Title    New Anthraquinone8 and Anthraquinone Glycosides from Morinda lucida  
 Abstract    From the trank heartwood of Morinda lucida four new anthraquinones, 3-hydroxy-anthraquinone-2-carbaldehyde, morindone-5-methyl ether, munjistin methyl ester, damna-canthol-cu-methyl ether and two glycosides, soranjidiol 6-0-/?-primveroside and lucidin 3-0-ß-primveroside were isolated and identified by spectroscopic and chemical methods. 
  Reference    Z. Naturforsch. 36b, 1180—1184 (1981); received May 20 1981 
  Published    1981 
  Keywords    Morinda lucida, Rubiaceae, Anthraquinones, Isolation 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1180.pdf 
 Identifier    ZNB-1981-36b-1180 
 Volume    36 
2Author    Birgit Posner, G. Uido, Benno Feige, Siegfried HuneckRequires cookie*
 Title    Phytochemische Untersuchungen an westeuropäischen Lasallia-Arten Phytochemical Investigations on Western European Lasallia Species  
 Abstract    The secondary product pattern o f 38 specimens o f Lasallia brigantium (Zsch.) Llano, L. hi-spaniea (Frey) Sancho & Crespo and L. pustulata (L.) Merat were investigated by HPLC. A c­ cording to previous publications gyrophoric acid, lecanoric acid and umbilicaric acid were de­ tected. Additionally two further unknown depsides were found. The presence o f the anthra-quinone skyrin, new to Lasallia, was shown for L. hispanica and L. pustulata. Skyrin is not equally distributed within the thalli but mainly concentrated in the umbilicus. In L. hispanica skyrin is located in the epihymenium, too. A correlation between secondary product pattern and thallus size or light supply does not exist. 
  Reference    Z. Naturforsch. 45c, 161 (1990); received November 12/23 1989 
  Published    1990 
  Keywords    Lasallia, Lichen Substances, Anthraquinones, Skyrin 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0161.pdf 
 Identifier    ZNC-1990-45c-0161 
 Volume    45 
3Author    F. M. Hammouda, A. M. Rizk, M.M S Eif, El-N AsrRequires cookie*
 Title    Anthraquinones of Certain Egyptian Asphodelus Species  
 Abstract    The study of the anthraquinones of Asphodelus fistulosus and A. microcarpus resulted in the isolation of chrysophanol, aloe-emodin, anhydrorugulosin, three others bianthraquinones (the cleavage products of which are either 1 ,8 -dehydroxyanthraquinone or chrysophanol) and chrysophanol-8 -mono-/?-D-glucoside. The obtained results revealed a qualitative difference in the anthraquinone content of the different parts (leaves, seeds and tubers). 
  Reference    (Z. Naturforsch. 29c, 351 [1974]; received February 7/April 19 1974) 
  Published    1974 
  Keywords    Asphodelus species, Anthraquinones, Chryophanol, Aloe-emodin, Bianthraquinones 
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 TEI-XML for    default:Reihe_C/29/ZNC-1974-29c-0351.pdf 
 Identifier    ZNC-1974-29c-0351 
 Volume    29 
4Author    A. Nette Sigler, HansW. RauwaldRequires cookie*
 Title    Aloe Plants Accumulate Anthrone-Type Anthranoids in Inflorescence and Leaves, and Tetrahydroanthracenes in Roots  
 Abstract    The accumulation and distribution of characteristic secondary products in the different organs of an A loe plant (A. succotrina Lam.) were studied by high perform ance liquid chro­ matography for the first time. In the leaves of the A loe plant, only anthrone-C-glycosyls of the 7-hydroxyaloin type and, for the first time in plant material, the free anthraquinone 7-hydroxyaloeemodin were found. In contrast to previous reports on the distribution of sec­ ondary products in A lo e plants, anthrone-C-glycosyls were also detected in flowers, bracts and the inflorescence axis of the species examined. Aloesaponol I, a tetrahydroanthracene aglycone, was only present in the underground organs and in the stem. The 2-alkylchromone-C-glucosyl aloeresin B showed no specific occurrence as it was found in every type of organ. Based on these results and the findings of recent studies on A loe roots and flowers, a distri­ bution scheme of polyketide types in the A loe plant was established. It suggests a separate and independent anthranoid metabolism for underground A loe organs and stem on the one hand, and for leaves and inflorescence organs on the other hand. In the latter structures anthranoid metabolism seems to be additionally compartmentalized as the anthranoid pro­ files of inflorescence organs and leaves differ in two points relevant to anthranoid biosynthe­ sis: firstly, the occurrence of anthrone aglycones and secondly, the individual content of corre­ sponding anthrone-C-glucosyl diastereomers. 
  Reference    Z. Naturforsch. 49c, 286—292 (1994); received February 4/March 21 1994 
  Published    1994 
  Keywords    Aloe, Asphodelaceae, Anthraquinones, Chromones, Polyketides, High Performance Liquid Chromatography 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0286.pdf 
 Identifier    ZNC-1994-49c-0286 
 Volume    49 
5Author    Arno Kunze3, Ludger Witteb, M. Anuel Aregullinc, Eloy Rodriguez0, Peter Proksch3Requires cookie*
 Title    Anthraquinones in the Leaf Beetle Trirhabda geminata (Chrysomelidae)  
 Abstract    Hydroxylated anthraquinones have been found to accumulate in different developm ental stages of the chrysomelid beetle Trirhabda geminata. Eggs, larvae and adults were analyzed by HPLC and GC-MS. Each developm ental stage analyzed contained l,8-dihydroxy-3-methyl-anthraquinone (chrysophanol) and 1,8-dihydroxyanthraquinone (chrysazin). No anthraquinones were detected in the faeces of T. geminata. The level of stored anthraqui­ nones did not change during starvation. In the host plant of this specialist herbivore, the brittlebush Encelia farinosa (A steraceae), anthraquinones were not detected. Possible biolog­ ical functions of anthraquinones stored in T. geminata are discussed. 
  Reference    Z. Naturforsch. 51c, 249 (1996); received D ecem ber 4 1995/January 26 1996 
  Published    1996 
  Keywords    Trirhabda gem inata, Chrysomelidae, Anthraquinones, Chrysazin, Chrysophanol 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0249.pdf 
 Identifier    ZNC-1996-51c-0249 
 Volume    51 
6Author    PaavoH. Hynninen, Riikka RäisänenRequires cookie*
 Title    Stepwise pH-Gradient Elution for the Preparative Separation of Natural Anthraquinones by Multiple Liquid-Liquid Partition  
 Abstract    Preparative-scale separation of substituted anthraquinones by multiple liquid-liquid parti­ tion was studied using isopropylmethyl ketone (IM K)/aqueous phosphate buffer (aq .) as the solvent system and the H ietala apparatus with 100 partition units as the partition equipment. The lower (aq.) phase was chosen as mobile, while the upper (IM K) phase remained station­ ary. H ence, the principle of stepwise pH-gradient elution could be utilized to separate the components in two com plex mixtures of hydroxyanthraquinones and hydroxyanthraquinone carboxylic acids, isolated from the fungus Dermocybe sanguinea. In spite of the nonlinearity of the partition isotherm s for these anthraquinones, implying deviations from the Nernst partition law, rem arkable separations were achieved for the components in each mixture. E very anthraquinone carboxylic acid showed markedly irregular partition behavior, appear­ ing in the effluent as two m ore or less resolved concentration zones. Such splitting was attributed to the form ation of relatively stable sandwich-dimers, which were in a slow equilib­ rium with the m onom ers in the m ore nonpolar organic phase. A t lower pH-values, only the polar monomers were distributed into the mobile aqueous phase and moved forward, whereas the nonpolar sandwich-dimers remained almost entirely in the stationary organic phase and lagged behind. When the pH of the mobile aqueous phase was raised high enough, the firmly linked dimers were monomerized and emerged from the apparatus as a second concentration profile. Interm olecular hydrogen bonding and jt-jt interaction between the n-systems of two anthraquinone molecules in a parallel orientation were considered responsible for the nonlinear and markedly irregular partition behavior of the natural anthraquinones studied. The nonlinearity of the partition behavior of the hydroxyanthraquinones lacking the carboxyl group, appeared merely as excessive broadening of the experimental concentration profile, which impaired the resolution between the components only insignificantly. Thus, e.g. the main components, dermocybin and emodin, could both be obtained from Separation 1 in a purity of at least 99% . 
  Reference    Z. Naturforsch. 56c, 719 (2001); received March 12/April 9 2001 
  Published    2001 
  Keywords    Liquid-Liquid Distribution, pH-Gradient, Anthraquinone 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0719.pdf 
 Identifier    ZNC-2001-56c-0719 
 Volume    56 
7Author    Lutz Heide, Eckhard LeistnerRequires cookie*
 Title    Versuche zur Synthese natürlich vorkommender prenylierter Naphthalinderivate. Nachweis eines neuen Prenylnaphthochinon- derivates in Galium mollugo Synthesis o f Naturally Occurring Prenylated N aphthalene Derivates. Isolation of a New Prenylnaphthoquinone from Galium mollugo  
 Abstract    prenylated naphthalene derivatives were synthesized and characterized by spectro­ scopic methods. One of these compounds, 2-methoxycarbonyl-3-prenyl-1,4-naphthoquinone, was detected as a new natural product in the root system of Galium mollugo L. This new natural product is likely to be related to the biosynthesis of mollugin and anthraquinones. 
  Reference    Z. Naturforsch. 37c, 354 (1982); received January 21 1982 
  Published    1982 
  Keywords    Galium mollugo L, Biosynthesis, Anthraquinones, Naphthalene Derivatives, Prenylation Several 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0354.pdf 
 Identifier    ZNC-1982-37c-0354 
 Volume    37