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Zeitschrift Für Naturforschung. C, A Journal of Biosciences

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https://www.readbyqxmd.com/read/27845891/curviflorside-and-curviflorin-new-naphthalene-glycoside-and-flavanol-from-plicosepalus-curviflorus
#1
Nawal M Al Musayeib, Sabrin R M Ibrahim, Musarat Amina, Gadah A Al Hamoud, Gamal A Mohamed
The naphthalene glycosidecurviflorside [1,5-dihydroxy-8-methoxynaphthalene-2-O-β-D-xylopyranoside] (3) and the flavanol curviflorin [(+)-catechin-7-O-3″,4″-dihydroxybenzoate] (4), along with two known flavonoids: (+)-catechin (1) and quercetin (2) were isolated from the shoots of Plicosepalu scurviflorus Benth. (Loranthaceae) growing in Saudi Arabia and the chemical structures were elucidated by 2D-NMR spectroscopy.
November 15, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27845890/virus-inactivation-under-the-photodynamic-effect-of-phthalocyanine-zinc-ii-complexes
#2
Mimi Remichkova, Luchia Mukova, Lubomira Nikolaeva-Glomb, Nadya Nikolova, Lubka Doumanova, Vanya Mantareva, Ivan Angelov, Veselin Kussovski, Angel S Galabov
Various metal phthalocyanines have been studied for their capacity for photodynamic effects on viruses. Two newly synthesized water-soluble phthalocyanine Zn(II) complexes with different charges, cationic methylpyridyloxy-substituted Zn(II)- phthalocyanine (ZnPcMe) and anionic sulfophenoxy-substituted Zn(II)-phthalocyanine (ZnPcS), were used for photoinactivation of two DNA-containing enveloped viruses (herpes simplex virus type 1 and vaccinia virus), two RNA-containing enveloped viruses (bovine viral diarrhea virus and Newcastle disease virus) and two nude viruses (the enterovirus Coxsackie B1, a RNA-containing virus, and human adenovirus 5, a DNA virus)...
November 15, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27831927/a-comparative-proteomic-analysis-for-adventitious-root-formation-in-lotus-root-nelumbo-nucifera-gaertn
#3
Cheng Libao, Jiang Runzhi, Yang Mengli, Li Liangjun, Li Shuyan
Adventitious roots (ARs) directly affect lotus seedling growth and product quality because principal root is not well developed. However, the details of AR formation at the molecular level have not been determined in lotus. Therefore, three stages were chosen to identify the change of proteins abundant during rhizome formation, using isobaric tags for relative and absolute quantization coupled with liquid chromatography-tandem mass spectrometry to gain insight into the molecular mechanisms involved in AR formation...
November 10, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27831926/biodegradation-of-micropollutant-naproxen-with-a-selected-fungal-strain-and-identification-of-metabolites
#4
Y Doruk Aracagök, Hakan Göker, Nilüfer Cihangir
Pharmaceuticals are widely used for treating human and animal diseases. Naproxen [(S) 6-methoxy-α-methyl-2-naphthalene acetic acid] and its sodium salt are members of the α-arylpropionic acid group of nonsteroidal anti-inflammatory drugs. Due to excessive usage of naproxen, this drug has been determined even in drinking water. In this study, four fungal strains Phanerochaete chrysosporium, Funalia trogii, Aspergillus niger, and Yarrowia lipolytica were investigated in terms of naproxen removal abilities. According to LC/MS data, A...
November 10, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27831925/synthesis-in-vitro-cytotoxicity-of-1h-benzo-f-chromene-derivatives-and-structure-activity-relationships-of-the-1-aryl-group-and-9-position
#5
Hany M Mohamed, Ahmed M Fouda, Essam S A E H Khattab, Ahmed M El- Agrody, Tarek H Afifi
A series of 1H-benzo[f]chromene-2-carbonitriles was synthesized and evaluated for their cytotoxic activities against MCF-7, HCT-116, and HepG-2 cancer cells. The SAR studies reported that the substitution in the phenyl ring at 1-position of 1H-benzo[f]chromene nucleus with the specific group, H atom, or methoxy group at 9-position increases the ability of the molecule against the different cell lines.
November 10, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27771627/anti-inflammatory-activity-of-highly-oxygenated-terpenoids-from-achillea-biebersteinii-afan
#6
Abou El-Hamd H Mohamed, Naglaa S Mohamed, Ahmed R Hamed, Mohamed-Elamir F Hegazy
In continuation of our chemical investigation on some medicinal plants of the genus Achillea, chromatographic investigation of the methylene chloride/methanol (1:1) extract of the air-dried aerial part of Achillea biebersteinii Afan. (family Asteraceae) afforded a new natural monoterpene (2), in addition to two known sesquiterpenes (3 and 4). Compound 1 was isolated as light needle crystals. Structures were established on the basis of MS and NMR spectroscopic (1H, 13C, 1H-1H correlation spectroscopy, heteronuclear multiple-quantum coherence and heteronuclear multiple-bond correlation) data and in case of compound 1 were confirmed by X-ray analysis...
October 24, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27770606/simultaneous-formulation-of-terbinafine-and-salvia-monoterpenes-into-chitosan-hydrogel-with-testing-biological-activity-of-corresponding-dialysates-against-c-albicans-yeast
#7
Alexandra Kodadová, Zuzana Vitková, Jarmila Oremusová, Petra Herdová, Anton Ťažký, Peter Mikuš
This work was aimed at a progressive formulation of drugs into chitosan hydrogels. It was taken into consideration that a therapeutic effect of the drugs could be enhanced by a combination of natural compounds with chemical (synthetic) drugs. In this work, sage essential oil (SEO) bicyclic monoterpenes with antiflogistic, antiseptic, and antimycotic properties were combined with terbinafine (TB) having a strong antimycotic activity. Detail optimization of the hydrogel-drugs composition (SEO monoterpenes, TB, chitosan, and polysorbate 80 concentrations), based on permeation experiment and UV absorption/GC-MS analysis of permeated species (eucalyptol, camphor, borneol, thujone, TB) in dialysates, was made...
October 22, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27770605/nmr-reassignment-of-stictic-acid-isolated-from-a-sumatran-lichen-stereocaulon-montagneanum-stereocaulaceae-with-superoxide-anion-scavenging-activities
#8
Friardi Ismed, Françoise Lohézic-Le Dévéhat, Isabelle Rouaud, Solenn Ferron, Amri Bakhtiar, Joël Boustie
The phytochemical study of Stereocaulon montagneanum harvested in Sumatra (Indonesia) led to the isolation of 11 known compounds including two metabolites not previously described in the genus Stereocaulon, peristictic acid (8) and menegazziaic acid (10). The complete 1H and 13C NMR spectral assignments of stictic acid derivatives are reported with some revisions. Five depsidones belonging to the stictic acid chemosyndrome were superoxide anion scavengers as potent as ascorbic acid and with no toxicity on two human cell lines...
October 22, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27768587/antiproliferative-effect-of-synthetic-cyclic-imides-methylphtalimides-carboxylic-acid-phtalimides-and-itaconimides-against-human-cancer-cell-lines
#9
Dorimar Stiz, Adriana Campos, Ana Lúcia Tasca Gois Ruiz, João Ernesto de Carvalho, Rogério Corrêa, Valdir Cechinel-Filho
This work describes the antiproliferative potential of 14 cyclic imides (methylphtalimides, carboxylic acid phtalimides and itaconimides) against several human cancer cell lines. The antiproliferative effect was evaluated using the sulforhodamine B assay. Although some compounds from methylphtalimide and carboxylic acid phtalimide classes exhibited a selective antiproliferative activity, the itaconimides (11-14) exhibited the best results, especially compound 14, which presented a TGI (concentration that produces total growth inhibition) value of 0...
October 21, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27768586/the-chemical-composition-antimicrobial-and-antioxidant-activities-of-pycnocycla-spinosa-and-pycnocyla-flabellifolia-essential-oils
#10
Mohaddese Mahboubi, Elaheh Mahdizadeh, Rezvan Heidary Tabar
The purpose of our study was to compare the chemical compositions and antimicrobial and antioxidant activities of Pycnocycla spinosa and Pycnocycla flabellifolia essential oils. cis-Asarone (62.5%) and widdra-2,4(14)-diene (9%) were the main components of P. spinosa aerial part essential oil, while elemicin (60.1%) and caryophyllene oxide (9.8%) were the main components of P. spinosa seed essential oil. α-Phellandrene (25.5%), p-cymene (15.3%), and limonene (13.3%) were found in P. flabellifolia essential oil...
October 21, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27740933/environmental-alterations-in-biofuel-generating-molecules-in-zilla-spinosa
#11
Hemmat Khattab, Zeinab El Marid
Now days, production of fuels and petrochemicals from renewable lignocellulosic biomass is an indispensable issue to meet the growing energy demand. Meanwhile, the changes in the climate and soil topography influence the growth and development as well as canopy level of the lignocellulosic biomass. In this study, Zilla spinosa Turr (Zilla) plants with similar age and size were collected from three main sectors (upstream, midstream, and downstream) of Wadi Hagul during spring (April) and summer (July) seasons...
October 14, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27705900/structural-diversity-in-echinocandin-biosynthesis-the-impact-of-oxidation-steps-and-approaches-toward-an-evolutionary-explanation
#12
Wolfgang Hüttel
Echinocandins are an important group of cyclic non-ribosomal peptides with strong antifungal activity produced by filamentous fungi from Aspergillaceae and Leotiomycetes. Their structure is characterized by numerous hydroxylated non-proteinogenic amino acids. Biosynthetic clusters discovered in the last years contain up to six oxygenases, all of which are involved in amino acid modifications. Especially, variations in the oxidation pattern induced by these enzymes account for a remarkable structural diversity among the echinocandins...
October 5, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27701142/caspase-1-from-the-silkworm-bombyx-mori-is-involved-in-bombyx-mori-nucleopolyhedrovirus-infection
#13
Qiang Wang, Xiaoli Ju, Liang Chen, Keping Chen
Caspase-1 is one of the effector caspases in mammals that plays a central role in apoptosis. However, the lepidopteran caspase-1, especially the Bombyx mori caspase-1 (Bm-caspase-1), has not been investigated in detail. In this study, Bm-caspase-1 was identified from an expressed sequence tag database in B. mori by BLAST search. The open reading frame of Bm-caspase-1 contained 879 nucleotides and encoded 293 amino acids with a predicted molecular mass of 33 kDa. Bm-caspase-1 contained two consensus amino acid motifs of caspase cleavage sites, DEGDA and TETDG...
October 4, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27701141/cytochalasin-p1-a-new-cytochalasin-from-the-marine-derived-fungus-xylaria-sp-sof11
#14
Ziming Chen, Yuchan Chen, Hongbo Huang, Hongyan Yang, Weimin Zhang, Yulin Sun, Jing Wen
A new cytochalasin, named cytochalasin P1 (1), together with four known analogs (2-5) was isolated from marine-derived fungus Xylaria sp. SOF11 from the South China Sea. The structure of the new compound was elucidated on the basis of MS and NMR (1H, 13C, HSQC, HMBC, and NOESY) data analyses. Compounds 1-5 were tested for their cytotoxicities against four tumor cell lines (SF-268, MCF-7, NCI-H460, and HepG-2). Compounds 1-5 showed significant cytotoxicity against two tumor cell lines MCF-7 and SF-268, with the IC50 values varying between 0...
October 4, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27701140/leaves-of-cordia-boissieri-a-dc-as-a-potential-source-of-bioactive-secondary-metabolites-for-protection-against-metabolic-syndrome-induced-in-rats
#15
Asmaa I Owis, Amira M Abo-Youssef, Ahmed H Osman
Cordia boissieri A. DC. (Boraginaceae) is traditionally used as an herbal remedy for diabetes by Hispanic women in Southwestern USA. A recent investigation showed the significant protective effect of ethyl acetate extract against metabolic syndrome (MS). However, the corresponding active principles responsible for this effect and relations between their structure and biological actions remain unclear. Thus, ethyl acetate extract was subjected to column chromatography, which yielded seven compounds identified on the basis of spectroscopic data as rutin, hesperidin, kaempferol-3-O-β-d-glucopyranoside, rosmarinic acid, β-sitosterol-3-O-β-d-glucopyranoside, quercetin, and kaempferol...
October 4, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27658144/seasonal-variation-of-gastroprotective-terpenoids-in-maytenus-robusta-celastraceae-quantified-by-gas-chromatography-flame-ionization-detection-gc-fid
#16
Tailyn Zermiani, Antonio A S Junior, Renê A Ferreira, Theodoro M Wagner, Marina S Machado, Valdir Cechinel-Filho, Rivaldo Niero
The triterpenes friedelin (1), β-friedelinol (2) and 3,15-dioxo-21α-hydroxyfriedelane (3) in the aerial parts of Maytenus robusta, a Brazilian medicinal plant with antiulcer potential, were seasonally quantified by gas chromatography flame-ionization detection (GC-FID) using an external standard. The method was found to be linear, precise and sensitive. Compounds 1 and 2 were found in M. robusta leaves and branches, with highest concentrations in the leaves collected in autumn, i.e. 3.21 ± 0.16 and 12.60 ± 1...
September 22, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27658145/aspernolides-l-and-m-new-butyrolactones-from-the-endophytic-fungus-aspergillus-versicolor
#17
Sabrin R M Ibrahim, Gamal A Mohamed, Samir A Ross
During the systematic search of active compounds from endophytic fungi, two new butyrolactones, namely aspernolides L (2) and M (4), together with four known compounds: 1-O-acetylglycerol (1), butyrolactone I (3), butyrolactone VI (5), and (+) alantrypinone (6) were characterized from the EtOAc extract of the endophytic fungus Aspergillus versicolor isolated from the roots of Pulicaria crispa (Asteraceae). Extensive spectroscopic analysis, including 1D, 2D NMR, and HRESIMS, was used to elucidate their structures...
September 21, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27626765/new-lupan-type-triterpenoids
#18
Pierre Mkounga, Hermine L D Maza, Blandine M W Ouahouo, Lydie N Tyon, Ishikawa Hayato, Nishino Hiroshi, Augustin E Nkengfack
Three new lupan-type triterpernoid derivatives, namely globimetulin A (1), B (2) and C (3), were isolated from the shoot of Globimetula dinklagei (Loranthaceae), a hemiparasitic plant growing on Manihot esculenta, along with five known compounds: friedelin (4), friedelan-3-ol (5), 28-hydroxyfriedelin (6), 4-hydroxy-3,5-dimethoxybenzoic acid (7) and (1R,5S,7S)-7-[2-(4-hydroxyphenyl)ethyl]-2,6-dioxabicyclo[3.3.1]nonan-3-one (8). The structures of the new compounds were elucidated by detailed analyses of their MS, IR, 1D and 2D NMR spectral data and chemical evidence...
September 14, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27626764/isolation-antimicrobial-and-antitumor-activities-of-a-new-polyhydroxysteroid-and-a-new-diterpenoid-from-the-soft-coral-xenia-umbellata
#19
Seif-Eldin N Ayyad, Walied M Alarif, Khalid O Al-Footy, Elham A Selim, Mohamed A Ghandourah, Magda M Aly, Hajer S Alorfi
A new C-30 steroid, 3β-,5α-,6β-,11α-,20β-pentahydroxygorgosterol (1), and a new diterpenoid, xeniumbellal (2), along with three known aromadendrane-type sesquiterpenes, aromadendrene (3), palustrol (4) and viridiflorol (5), were isolated from the soft coral Xenia umbellata. Chemical structures were determined by analyzing their NMR and MS data. The antimicrobial and antitumor activities of the isolated compounds were examined. Both 1 and 2 showed moderate antibacterial activities, especially against the multidrug-resistant Acinetobacter baumannii (MIC 0...
September 14, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27626766/picturing-pathogen-infection-in-plants
#20
Matilde Barón, Mónica Pineda, María Luisa Pérez-Bueno
Several imaging techniques have provided valuable tools to evaluate the impact of biotic stress on host plants. The use of these techniques enables the study of plant-pathogen interactions by analysing the spatial and temporal heterogeneity of foliar metabolism during pathogenesis. In this work we review the use of imaging techniques based on chlorophyll fluorescence, multicolour fluorescence and thermography for the study of virus, bacteria and fungi-infected plants. These studies have revealed the impact of pathogen challenge on photosynthetic performance, secondary metabolism, as well as leaf transpiration as a promising tool for field and greenhouse management of diseases...
September 1, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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