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Zeitschrift Für Naturforschung. C, A Journal of Biosciences

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https://www.readbyqxmd.com/read/28525357/a-dihydrochalcone-derivative-and-further-steroidal-saponins-from-sansevieria-trifasciata-prain
#1
Billy T Tchegnitegni, Rémy B Teponno, Kristina Jenett-Siems, Matthias F Melzig, Tomofumi Miyamoto, Léon A Tapondjou
Phytochemical investigation of the aerial parts of Sansevieria trifasciata, one of the most common Dracaenaceae plants, has resulted in the isolation of a new dihydrochalcone derivative named trifasciatine C (1), four previously unreported steroidal saponins as two pairs of inseparable regioisomers: trifasciatosides K/L (2/3), M/N (4/5), together with the known 1,2-(dipalmitoyl)-3-O-β-D-galactopyranosylglycerol (6), aconitic acid (7), and 1-methyl aconitic acid (8). Their structures were elucidated mainly by extensive spectroscopic analysis (1D and 2D nuclear magnetic resonance) and high-resolution electronspray ionization-mass spectrometry, as well as chemical methods and comparison of their spectral data with those of related compounds...
May 18, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28525356/synthesis-biological-activity-and-molecular-modeling-study-of-new-schiff-bases-incorporated-with-indole-moiety
#2
Ahmed H Halawa, Shimaa Mohamed Abd El-Gilil, Ahmed H Bedair, Mohamed Shaaban, Marcel Frese, Norbert Sewald, Essam M Eliwa, Ahmed M El-Agrody
A new series of heterocyclic Schiff bases 2-9 containing indole moiety were synthesized by facile and efficient condensation of indole-3/2/5-carboxaldehyde (1a/1b/1c) with different aromatic and heterocyclic primary amines using conventional and/or microwave irradiation methods. The structures of the obtained compounds were assigned by sophisticated spectroscopic and spectrometric techniques (1D-NMR, 2D-NMR and MS). The synthesized compounds were screened for their cytotoxicity and antibacterial activities...
May 18, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28525347/sustainable-farming-of-the-mealworm-tenebrio-molitor-for-the-production-of-food-and-feed
#3
Thorben Grau, Andreas Vilcinskas, Gerrit Joop
The farming of edible insects is an alternative strategy for the production of protein-rich food and feed with a low ecological footprint. The industrial production of insect-derived protein is more cost-effective and energy-efficient than livestock farming or aquaculture. The mealworm Tenebrio molitor is economically among the most important species used for the large-scale conversion of plant biomass into protein. Here, we review the mass rearing of this species and its conversion into food and feed, focusing on challenges such as the contamination of food/feed products with bacteria from the insect gut and the risk of rapidly spreading pathogens and parasites...
May 17, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28593879/deciphering-the-route-to-cyclic-monoterpenes-in-chrysomelina-leaf-beetles-source-of-new-biocatalysts-for-industrial-application
#4
Antje Burse, Wilhelm Boland
The drastic growth of the population on our planet requires the efficient and sustainable use of our natural resources. Enzymes are indispensable tools for a wide range of industries producing food, pharmaceuticals, pesticides, or biofuels. Because insects constitute one of the most species-rich classes of organisms colonizing almost every ecological niche on earth, they have developed extraordinary metabolic abilities to survive in various and sometimes extreme habitats. Despite this metabolic diversity, insect enzymes have only recently generated interest in industrial applications because only a few metabolic pathways have been sufficiently characterized...
May 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28455953/biotechnology-for-bioenergy-dedicated-trees-meeting-future-energy-demands
#5
Hani Al-Ahmad
With the increase in human demands for energy, purpose-grown woody crops could be part of the global renewable energy solution, especially in geographical regions where plantation forestry is feasible and economically important. In addition, efficient utilization of woody feedstocks would engage in mitigating greenhouse gas emissions, decreasing the challenge of food and energy security, and resolving the conflict between land use for food or biofuel production. This review compiles existing knowledge on biotechnological and genomics-aided improvements of biomass performance of purpose-grown poplar, willow, eucalyptus and pine species, and their relative hybrids, for efficient and sustainable bioenergy applications...
April 29, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28453442/3-7-isoquinoline-quinones-from-the-ascidian-tunicate-ascidia-virginea
#6
Sven T Possner, Frank C Schroeder, Hans Tore Rapp, Volker Sinnwell, Stefan Franke, Wittko Francke
A new isoquinoline quinone system and its iodinated derivatives were isolated from the ascidian tunicate Ascidia virginea Müller 1776 (Phlebobranchia: Ascidiidae). Structures were elucidated by spectroscopic methods and derivatization reactions. Ascidine A (3,7-dihydro-1,8-dihydroxy-4-(4'-hydroxyphenyl)isoquinoline-3,7-dione (1), ascidine B (3,7-dihydro-1,8-dihydroxy-4-(4'-hydroxy-3'-iodophenyl)isoquinoline-3,7-dione (2), and ascidine C (3,7-dihydro-1,8-dihydroxy-4-(4'-hydroxy-3',5'-diiodophenyl)isoquinoline-3,7-dione (3) represent a novel type of tyrosine-derived alkaloids...
April 28, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28432851/fungal-production-of-the-polysaccharide-pullulan-from-a-plant-hydrolysate
#7
Thomas P West
The ability of the fungus Aureobasidium pullulans ATCC 42023 to produce pullulan from hydrolysates of the native grass known as prairie cordgrass was investigated and examined relative to polysaccharide and cell biomass production, yield, and pullulan content of the polysaccharide. A pullulan concentration of 9.7 g l-1 and yield of 0.78 g g-1 was produced by ATCC 42023 when grown for 168 h at 30°C on a phosphate-buffered hydrolysate. The highest biomass level of 7.7 g l-1 was produced by ATCC 42023 after 168 h on a hydrolysate-containing complete medium...
April 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28432850/a-detailed-experimental-study-of-a-dna-computer-with-two-endonucleases
#8
Sebastian Sakowski, Tadeusz Krasiński, Joanna Sarnik, Janusz Blasiak, Jacek Waldmajer, Tomasz Poplawski
Great advances in biotechnology have allowed the construction of a computer from DNA. One of the proposed solutions is a biomolecular finite automaton, a simple two-state DNA computer without memory, which was presented by Ehud Shapiro's group at the Weizmann Institute of Science. The main problem with this computer, in which biomolecules carry out logical operations, is its complexity - increasing the number of states of biomolecular automata. In this study, we constructed (in laboratory conditions) a six-state DNA computer that uses two endonucleases (e...
April 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28170343/bioenergetic-strategy-of-microalgae-for-the-biodegradation-of-tyrosol-and-hydroxytyrosol
#9
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...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28160544/effects-of-hypericum-perforatum-extract-on-oxaliplatin-induced-neurotoxicity-in-vitro-evaluations
#10
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...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28107178/influence-of-structure-of-lactones-with-the-methylcyclohexene-and-dimethylcyclohexene-ring-on-their-biotransformation-and-antimicrobial-activity
#11
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)...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27997356/termiglaucescin-a-new-polyhydroxy-triterpene-glucoside-from-terminalia-glaucescens-with-antioxidant-and-anti-inflammatory-potential
#12
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...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27845891/curviflorside-and-curviflorin-new-naphthalene-glycoside-and-flavanol-from-plicosepalus-curviflorus
#13
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.
May 1, 2017: 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
#14
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...
May 1, 2017: 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
#15
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...
May 1, 2017: 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
#16
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.
May 1, 2017: 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...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28315853/effects-of-extracts-and-compounds-from-tricholoma-populinum-lange-on-degranulation-and-il-2-il-8-secretion-of-immune-cells
#18
Simon Merdivan, Kristina Jenett-Siems, Karsten Siems, Timo H J Niedermeyer, Nadin Schultze, Carmen Steinborn, Carsten Gründemann, Ulrike Lindequist
Tricholoma populinum Lange is an edible basidiomycete from the family Tricholomataceae. Extracts, fractions, and different metabolites isolated from the fruiting bodies of this mushroom were tested for degranulation-inhibiting activities on RBL-2H3 cells (rat basophils). Dichloromethane extracts decreased degranulation significantly, as did a fraction after column chromatography. In addition, the extract decreased the IL-2 release from Jurkat T cells and the release of IL-8 from HMC-1 human mast cells. The results show the significant effects of extracts of T...
March 20, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28301324/response-of-alternative-splice-isoforms-of-osrad9-gene-from-oryza-sativa-to-environmental-stress
#19
Rui Li, Wenguo Wang, Fosheng Li, Qingwei Wang, Shenghua Wang, Ying Xu, Fang Chen
Rad9 protein plays an important role in cell-cycle checkpoint signal transduction in human and yeast cells, but knowledge about Rad9 in plants is limited. This study reports that the Rad9 gene of rice can generate the transcript products OsRad9.1 and OsRad9.2 through alternative splicing. OsRad9.1, with all nine exons, is the main cell-cycle checkpoint protein involved in the response of rice to genotoxic stresses (ultraviolet radiation and antibiotic stress), environmental stresses (drought, salt, and heavy metal stress), and auxin stimuli (2,4-D, IAA, and IBA)...
March 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28306545/scent-gland-constituents-of-the-middle-american-burrowing-python-loxocemus-bicolor-serpentes-loxocemidae
#20
Thies Schulze, Paul J Weldon, Stefan Schulz
Analysis by gas chromatography/mass spectrometry of the scent gland secretions of male and female Middle American burrowing pythons (Loxocemus bicolor) revealed the presence of over 300 components including cholesterol, fatty acids, glyceryl monoalkyl ethers, and alcohols. The fatty acids, over 100 of which were identified, constitute most of the compounds in the secretions and show the greatest structural diversity. They include saturated and unsaturated, unbranched and mono-, di-, and trimethyl-branched compounds ranging in carbon-chain length from 13 to 24...
March 15, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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