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Zeitschrift Für Naturforschung. C, A Journal of Biosciences

Patel Navin, Patel Sarvil, Purohit Amit, Patel Divyesh, Rajani Dhansukh, Rosa Moo-Puc, Gildardo Rivera
A series of thiazepines and diazepines having 1,3,4-oxadiazole moiety were synthesized, and they were analyzed for their in vitro antimicrobial activity against several bacteria (Staphylococcus aureus, Staphylococcus pyogenes, Escherichia coli, and Pseudomonas aeruginosa) and fungi (Candida albicans, Aspergillus niger, and Aspergillus Clavatus) and protozoa (Entamoeba histolytica, Giardia lamblia, Trypanosoma cruzi and Leishmania mexicana). Few of the selected compounds were tested for their antitubercular activity...
February 9, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Aikaterini Papazi, Andreas Ioannou, Myrto Symeonidi, Andreas G Doulis, Kiriakos Kotzabasis
Olive mill wastewater has significant polluting properties due to its high phenolic content [mainly tyrosol (trs) and hydroxytyrosol (htrs)]. Growth kinetics and a series of fluorescence induction measurements for Scenedesmus obliquus cultures showed that microalgae can be tolerant of these phenolic compounds. Changes in the cellular energy reserves and concentration of the phenolic compounds adjust the "toxicity" of these compounds to the microalgae and are, therefore, the main parameters that affect biodegradation...
February 7, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Lorenzo Cinci, Lorenzo Di Cesare Mannelli, Anna Maidecchi, Luisa Mattoli, Carla Ghelardini
Hypericum perforatum L. has been used for centuries as a natural remedy for the treatment of many disorders. Neuropathic pain is a common side effect of oxaliplatin-based chemotherapy and often the cause of therapy discontinuation. Thanks to its anti-inflammatory and analgesic effects, the use of H. perforatum may be a novel therapeutic strategy for neuropathy. The aim of this paper was to evaluate the effect of H. perforatum hydrophilic extract on an in vitro model of oxaliplatin-induced neurotoxicity. The antioxidant potential of extract was first evaluated in cell-free models by the thiobarbituric acid-reactive substances assay and nitro blue tetrazolium oxidation test; the ability of H...
February 4, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Amal W Danial, Ahmed M Abdel Wahab, Houssam H Arafat, Refat Abdel-Basset
Two local hydrogen-evolving strains of purple nonsulfur bacteria have been isolated, characterized, and identified as Rhodopseudomonas sp. TUT (strains Rh1 and Rh2). Lactate followed by succinate and malate supported the highest amounts of H2 production, growth (O.D.660nm, proteins and bacteriochlorphyll contents), nitrogenase activity, and uptake hydrogenase; the least of which was acetate. Alginate-immobilized cells evolved higher hydrogen amounts than free cell counterparts. Rh1 was more productive than Rh2 at all circumstances...
January 25, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Katarzyna Wińska, Małgorzata Grabarczyk, Wanda Mączka, Barbara Żarowska, Gabriela Maciejewska, Mirosław Anioł
The aim of this article is influence of the structure of lactones with the methylcyclohexene and dimethylcyclohexene ring on their biotransformation and antimicrobial activity. This work was based on the general remark that even the smallest change in the structure of a compound can affect its biological properties. The results of the biotransformation of four bicyclic unsaturated lactones with one or two methyl groups in the cyclohexene ring was tested using fifteen fungal strains (Fusarium species, Penicillium species, Absidia species, Cunninghamella japonica, and Pleurotus ostreatus) and five yeast strains (Yarrowia lipolytica, Rhodorula marina, Rhodorula rubra, Candida viswanathii, and Saccharomyces cerevisiae)...
January 20, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Jullyana de Souza Siqueira Quintans, Rafael Dos Santos Alves, Darlisson de Alexandria Santos, Mairim Russo Serafini, Péricles Barreto Alves, Emmanoel Vilaça Costa, Gokhan Zengin, Lucindo José Quintans-Júnior, Adriana Gibara Guimarães
Aristolochia trilobata L. is an aromatic plant, popularly known as "mil-homens", and its essential oil (EO) is generally used to treat colic, diarrhea and dysentery disorders. We evaluated the antinociceptive effect of A. trilobata stem EO and of its major compound, the (R)-(-)-6-methyl-5-hepten-2-yl acetate (sulcatyl acetate: SA), using acetic acid (0.85%)-induced writhing response and formalin-induced (20 μL of 1%) nociceptive behavior in mice. We also evaluated the EO and SA effect on motor coordination, using the rota-rod apparatus...
January 20, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Nkosiyethu K Mkhwanazi, Charles B de Koning, Willem A L van Otterlo, Mario Ariatti, Moganavelli Singh
Hepatocellular carcinoma is a burgeoning health issue in sub-Saharan Africa and East Asia where it is most prevalent. The search for gene medicine treatment modalities for this condition represents a novel departure from current treatment options and is gaining momentum. Here we report on nonPEGylated and on sterically stabilized PEGylated cationic liposomes decorated with D-galacto moieties linked to 24.1 Å spacers for asialoglycoprotein receptor (ASGP-R)-targeted vehiculation of pCMV-luc plasmid DNA. Cargo DNA is fully liposome associated at N/P ratio=3:1 and is partially protected from the effects of serum nucleases...
January 7, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Amadou Dawé, Benjamin Talom, Gilbert Deccaux Wabo Fotso Kapche, Kauser Siddiqui, Fawai Yakai, Emmanuel Talla, Muhammad Ali Shaiq, Iqbal Lubna, Bonabenture Tchaleu Ngadjui
Termiglaucescin (1), a new triterpene glucoside, has been isolated from the ethyl acetate extract of the root bark of Terminalia glaucescens Planch. ex Benth, together with 11 known compounds, β-D-glucopyranosyl 2α,3β,6β-trihydroxy-23-galloylolean-12-en-28-oate (2), arjunglucoside I (3), sericoside (4), arjungenin (5), sericic acid (6), arjunetin (7), chebuloside II (8), 3,3',4-tri-O-methylelagic acid (9), 3,3'-di-O-methylelagic acid (10), β-sitosterol (11) and stigmasterol (12). Compounds 2, 3, 7, 8 and 9 are reported from the plant for the first time...
December 20, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Marwa Elsbaey, Kadria F M Ahmed, Mahmoud F Elsebai, Ahmed Zaghloul, Mohamed M A Amer, Mohamed-Farid I Lahloub
An indole alkaloid, 2-(5-hydroxy-1H-indol-3-yl)-2-oxo-acetic acid (1) isolated for the first time from nature, in addition to the nine known compounds 5-hydroxy-1H-indole-3-carboxylic acid methyl ester (2), alocasin B (3), hyrtiosin B (4), α-monopalmitin (5), 1-O-β-D-glucopyranosyl-(2S, 3R, 4E, 8Z)-2-[(2(R)-hydroctadecanoyl) amido]-4,8-octadecadiene-1,3-diol (6), 3-epi-betulinic acid (7), 3-epi-ursolic acid (8), β-sitosterol (9) and β-sitosterol 3-O-β-D-glucoside (10) were isolated from the rhizomes of Alocasia macrorrhiza (Araceae)...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Sabrin R M Ibrahim, Hossam M Abdallah, Gamal A Mohamed, Mohamed A Farag, Khalid Z Alshali, Emad A Alsherif, Samir A Ross
A comparative investigation of hydro-distilled essential oils from aerial parts of Mentha longifolia L. (ML), Mentha microphylla K.Koch (MM), Mentha australis R.Br. (MA), and Teucrium polium L. (TP) growing in Al Madinah Al Munawwarah, Saudi Arabia, was carried out. The total numbers of identified constituents were 22, 23, 14, and 20 in ML, MM, MA, and TP oils, representing 93.0, 99.3, 78.1, and 81.1% of the total oil composition, respectively. Pulegone (40.7%) and cineole (33.4%) were the major components in ML, whereas carvone (64...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Jayavardhana R Palem, Mudit Mudit, Shao-Chung V Hsia, Khalid A El Sayed
Herpes simplex virus type-1 (HSV-1) is a member of alpha-herpesviridae family and is known to cause contagious human infections. The marine habitat is a rich source of structurally unique bioactive secondary metabolites. A small library of marine natural product classes 1-10 has been screened to discover a new hit entity active against HSV-1. Manzamine A showed potent activity against HSV-1 via targeting the viral gene ICP0. Manzamine A is a β-carboline alkaloid isolated from the Indo-Pacific sponge Acanthostrongylophora species...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Savio S Elo-Manga, Anastasie E Tih, Raphael T Ghogomu, Alain Blond, Bernard Bodo
The leaves of Campylospermum elongatum have furnished the cyano-glycoside (lithospermoside), nine isomeric biflavonoid derivatives among which five are I3-II6 linked (robustaflavone; 4'-O-methyl robustaflavone; 4',4″'-di-O-methyl robustaflavone; 7,4',4″-tri-O-methyl robustaflavone; 4',7″-di-O-methyl robustaflavone) and four I3-II8 linked (amentoflavone; 7-O-methyl amentoflavone; 7,7″-di-O-methyl amentoflavone; 7, 4',7″-tri-O-methyl amentoflavone) and a flavone glycoside, 4″-O-methyl-7-O-β-d-galactosylapigenin...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Rafael A Espiritu
Amphidinol 3 (AM3) and theonellamide A (TNM-A) are potent antifungal compounds produced by the dinoflagellate Amphidinium klebsii and the sponge Theonella spp., respectively. Both of these metabolites have been demonstrated to interact with membrane lipids ultimately resulting in a compromised bilayer integrity. In this report, the activity of AM3 and TNM-A in ternary lipid mixtures composed of 1-palmitoyl-2-oleoyl-sn-glycerol-3-phosphocholine (POPC):brain sphingomyelin:cholesterol at a mole ratio of 1:1:1 or 3:1:1 exhibiting lipid rafts coexistence is presented...
January 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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
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
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
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