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Zeitschrift Für Naturforschung. C, A Journal of Biosciences

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https://www.readbyqxmd.com/read/29197862/monoterpenes-induce-the-heat-shock-response-in-arabidopsis
#1
Masakazu Hara, Naoya Yamauchi, Yoshiki Sumita
Monoterpenes are common constituents of essential oils produced by plants. Although it has been reported that monoterpenes enhanced the heat tolerance of plants, the mechanism has not been elucidated. Here, we tested whether 13 monoterpenes promoted the heat shock response (HSR) in Arabidopsis. To assess the HSR-inducing activity of monoterpenes, we produced transgenic Arabidopsis, which has the β-glucuronidase gene driven by the promoter of a small heat shock protein (HSP17.6C-CI) gene. Results indicated that two monocyclic and four bicyclic monoterpenes showed HSR-inducing activities using the reporter gene system...
December 4, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29182515/sesquiterpenes-from-the-saudi-red-sea-litophyton-arboreum-with-their-cytotoxic-and-antimicrobial-activities
#2
Lamia T Abou El-Kassem, Usama W Hawas, Samy K El-Desouky, Radwan Al-Farawati
A new pseudoguaiane-type sesquiterpene named litopharbol (1) was isolated from the methanolic extract of the Red Sea soft coral Litophyton arboreum, along with known sesquiterpenoids alismol (2), alismorientol B (3), teuhetenone A (4), and calamusin I (5); steroid, 24-methyl-cholesta-5,24(28)-diene-3β-ol (6), alkyl glyceryl ether, chimyl alcohol (7); sphingolipid, erythro-N-dodecanoyl-docosasphinga-(4E,8E)-dienine (8); and nitrogenous bases, thymine (9) and thymidine (10). The structures were determined on the basis of nuclear magnetic resonance (NMR) spectroscopic (1D and 2D NMR data including heteronuclear single quantum coherence spectroscopy, heteronuclear multiple-bond correlation spectroscopy, and nuclear Overhauser effect spectroscopy) and mass spectrometric analyses...
November 28, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29161234/synthesis-of-methyl-4-dihydrotrisporate-b-and-methyl-trisporate-b-morphogenetic-factors-of-zygomycetes-fungi
#3
Yoko Nakamura, Christian Paetz, Wilhelm Boland
(9Z)-Methyl 4-dihydrotrisporate B and (9Z)-methyl trisporate B, pheromones of Zygomycetes fungi, have been synthesized using Stille cross-coupling from previously described cyclohexenone precursors. Conducting the coupling without protection groups allowed for a short and stereospecific synthesis route of the late trisporoids. Stability studies for both the compounds revealed (9Z)-methyl trisporate B to be very unstable against UV irradiation.
November 21, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29145173/a-new-method-for-fast-extraction-and-determination-of-chlorophylls-in-natural-water
#4
Nianwei Qiu, Xiushun Wang, Feng Zhou
Algae collection and chlorophyll extraction are two troublesome steps in the traditional methods used for the determination of chlorophyll concentration in natural water. A new method was established in this study for fast collection and extraction of chlorophyll. Based on our results, the optimum centrifugation condition for collecting algae was determined as: 5000 g for 15 min at 4 °C, and the optimum dilution ratio of dimethyl sulfoxide: 90% acetone was 1:4. The specific steps were as follows: the algae in water samples were collected by centrifugation at 5000 g at 4 °C for 15 min...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29145172/volatiles-from-cinnamomum-cassia-buds
#5
Daniel Sandner, Ulrich Krings, Ralf G Berger
While the chemical composition of leaf and stem bark essential oils of the Chinese cinnamon, Cinnamomum cassia (L.) J. Presl, has been well investigated, little is known about the volatilom of its buds, which appeared recently on German markets. Soxhlet extracts of the commercial samples were prepared, fractionated using silica gel and characterised by gas chromatography-flame ionisation detector (GC-FID) for semi-quantification, by gas chromatography-mass spectrometry (GC-MS) for identification and by GC-FID/olfactometry for sensory evaluation...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29116938/mangostanaxanthone-vii-a-new-cytotoxic-xanthone-from-garcinia-mangostana
#6
Sabrin R M Ibrahim, Gamal A Mohamed, Mahmoud A Elfaky, Mohamed F Zayed, Amal A El-Kholy, Osama H Abdelmageed, Samir A Ross
Garcinia mangostana L. (the queen of fruits, mangosteen, family Guttiferae) is a wealthy source of xanthones. The CHCl3 soluble fraction of the air-dried pericarps of G. mangostana provided a new xanthone: mangostanaxanthone VII (5), along with four known xanthones: mangostanaxanthones I (1) and II (2), gartanin (3) and γ-mangostin (4). The structural verification of these metabolites was achieved by different spectral techniques, including UV, IR, 1D and 2D NMR and HRESIMS. The new metabolite was assessed for cytotoxic potential, using sulforhodamine B (SRB) assay towards the A549 and MCF-7 cancer cell lines...
November 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29116937/synthesis-and-biological-evaluation-of-acyl-derivatives-of-hydroxyflavones-as-potent-antiproliferative-agents-against-drug-resistance-cell-lines
#7
Monika Stompor, Marta Świtalska, Joanna Wietrzyk
The synthesis of hydroxyflavone derivatives is described. The acyl derivatives of 3-, 6-, 7-hydroxyflavones (compounds 2, 4, 6, respectively) and chrysin (5,7-dihydroxyflavone, 7) were obtained in high yields and evaluated in vitro for their cytotoxic activity against several cancer cell lines of different origin: MCF-7 (breast cancer), A549 (nonsmall cell lung cancer), MES-SA (uterine sarcoma), LoVo (colon cancer), drug-resistant human cancer cells (MES-SA/DX5, LoVo/DX) and also towards non-cancer cell line MCF-10A (normal breast epithelial cells)...
November 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29055178/n-acetylborrelidin-b-a-new-bioactive-metabolite-from-streptomyces-mutabilis-sp-mii
#8
Abdelaaty Hamed, Ahmed S Abdel-Razek, Marcel Frese, Daniel Wibberg, Atef F El-Haddad, Tarek M A Ibrahim, Jörn Kalinowski, Norbert Sewald, Mohamed Shaaban
In the course of our screening program for new bioactive compounds, a naturally new 18-membered macrolide antibiotic, N-acetylborrelidin B (1) along with borrelidin (2) were obtained from the marine Streptomyces mutabilis sp. MII. The strain was isolated from a sediment sample collected in the Red Sea at the Hurghada Coast and characterized taxonomically. Additional nine diverse bioactive compounds were reported: 6-prenyl-indole-3-acetonitrile (3), sitosteryl-3β-d-glucoside, campesterol, ferulic acid, linoleic acid methyl ester, linoleic acid, N-acetylanthranilic acid, indole 3-acetic acid methyl ester, indole 3-carboxylic acid, and adenosine...
October 21, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937968/diverse-bioactive-compounds-from-sarcophtyton-glaucom-structure-elucidation-and-cytotoxic-activity-studies
#9
Mohamed Shaaban, Ali M El-Hagrassi, Mohamed A Abdelghani, Abeer F Osman
Chemical investigation of the Red Sea soft coral Sarcophyton glaucom collected at the coasts of Hurghada, Egypt, led to the isolation of one new naturally occurring 4-oxo-1,1'-pentanoic acid anhydride (1), along with four diterpenes; sarcophinone (2a), 8-epi-sarcophinone (2b), (+)-7α,8β-dihydroxydeepoxysarcophine (3), sinumaximol G (4), (+)-sarcophine (5), sesquiterpene; prostantherol (6), sterol; 3β,24S-ergost-5-en-ol (7) and hexadecanoic acid. The structures of the obtained compounds were established using diverse spectroscopic techniques including 1D and 2D NMR and HRMS...
September 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937966/malusides-novel-glucosylceramides-isolated-from-apple-pomace-malus-domestica
#10
Mathias Reisberg, Norbert Arnold, Andrea Porzel, Reinhard H H Neubert, Birgit Dräger
Three new glucosylceramides (GluCers) named malusides I-III (1-3) were isolated from apple (cultivars of Malus domestica) pomace (fruit material remaining after juice extraction). An unusual oxo/hydroxy group pattern within the sphingadienine (d18:2) type sphingoid base was observed. All compounds contained the same α-hydroxylated fatty acid (h16:0) and a β-D-glucose moiety. Their structures were assigned on the basis of one- and two-dimensional (1D and 2D) nuclear magnetic resonance (NMR) spectroscopic analyses and mass spectrometry (MS) measurements...
September 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28917086/kostchyienones-a-and-b-new-antiplasmodial-and-cytotoxicity-of-limonoids-from-the-roots-of-pseudocedrela-kotschyi-schweinf-harms
#11
Lazare S Sidjui, Yves O D Nganso, Rufin M K Toghueo, Brussine N K Wakeu, Joel T Dameue, Pierre Mkounga, Achyut Adhikari, Mehreen Lateef, Gabriel N Folefoc, Muhammad S Ali
Two new limonoids, kostchyienones A (1) and B (2), along with 12 known compounds 3-14 were isolated from the roots of Pseudocedrela kostchyi. Compound (7) was isolated for the first time from a natural source. Their structures were elucidated on the basis of spectroscopic evidence. Compounds 1-6 and 13-14 gave IC50 values ranging from 0.75 to 5.62 μg/mL for antiplasmodial activity against chloroquine-sensitive (Pf3D7) and chloroquine-resistant (PfINDO) strains of Plasmodium falciparum. Compound 5 showed moderate potential cytotoxicity against the HEK239T cell line with an IC50 value of 22...
September 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29016357/corrigendum-to-ginkgetin-inhibits-proliferation-of-human-leukemia-cells-via-the-tnf-%C3%AE-signaling-pathway
#12
Ling-Ling Pan, Wen-Jun Wu, Gao-Feng Zheng, Xiao-Yan Han, Jing-Song He, Zhen Cai
No abstract text is available yet for this article.
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937967/acetogenins-and-alkaloids-during-the-initial-development-of-annona-muricata-l-annonaceae
#13
Christian Anabí Riley-Saldaña, María Del Rocío Cruz-Ortega, Mariano Martínez Vázquez, Iván De-la-Cruz-Chacón, Marisol Castro-Moreno, Alma Rosa González-Esquinca
In plants, the presence and distribution of specialized metabolites during the early stages of development are not documented enough, even though their biosynthesis is one of the most important strategies for survival. In this study, five alkaloids and four acetogenins were detected in Annona muricata L. during early development seedling, including three phases of root emergence and three of seedling formation. Hexane and alkaloid extracts were obtained from each organ, which were analyzed in a gas-mass chromatograph and in a high-performance liquid chromatograph coupled with a photodiode array UV detector (HPLC-DAD)...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28902633/ginkgetin-inhibits-proliferation-of-human-leukemia-cells-via-the-tnf-%C3%AE-signaling-pathway
#14
Ling-Ling Pan, Wen-Jun Wu, Gao-Feng Zheng, Xiao-Yan Han, Jing-Song He, Zhen Cai
Ginkgetin is known to be an anticancer agent in many studies. However, its effectiveness in treating chronic lymphoblastic leukemia (CLL) remains unknown. The present study aimed to evaluate the effects of ginkgetin on the growth of the K562 cell line. The MTT assay was employed to examine the proliferation of K562, and a terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) staining was conducted to detect the apoptotic rates. Furthermore, changes of tumor necrosis factor-α (TNF-α) were detected by Western blot analysis...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28822987/effects-of-a-water-extract-of-lepidium-meyenii-root-in-different-models-of-persistent-pain-in-rats
#15
Barbara Tenci, Lorenzo Di Cesare Mannelli, Mario Maresca, Laura Micheli, Giuseppe Pieraccini, Nadia Mulinacci, Carla Ghelardini
Lepidium meyenii (Walp.), commonly called maca, is an Andean crop belonging to the Brassicaceae family. Maca hypocotils are habitually consumed as customary food as well as traditional remedies for pathological conditions such as infertility. Moreover, the characterization of maca extracts revealed the presence of compounds that are able to modulate the nervous system. Aimed to evaluate the efficacy of L. meyenii in persistent pain, the present study analyzed the effects of a commercial root extract from maca in different animal models reproducing the most common causes of chronic painful pathologies...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28672764/interaction-of-tubulin-and-protein-kinase-ck2-in-trypanosoma-equiperdum
#16
Beatriz E Boscán, Graciela L Uzcanga, Maritza Calabokis, Rocío Camargo, Frank Aponte, José Bubis
A polypeptide band with an apparent molecular weight of 55,000 was phosphorylated in vitro in whole-cell lysates of Trypanosoma equiperdum. This band corresponds to tubulin as demonstrated by immunoprecipitation of the phosphorylated polypeptide from T. equiperdum extracts when anti-α and anti-β tubulin monoclonal antibodies were employed. A parasite protein kinase CK2 was in charge of modifying tubulin given that common mammalian CK2 inhibitors such as emodin and GTP, hindered the phosphorylation of tubulin and exogenously added casein...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28640755/chemical-composition-and-biological-activities-of-leaf-and-fruit-essential-oils-from-eucalyptus-camaldulensis
#17
Gulden Dogan, Nazan Kara, Eyup Bagci, Seher Gur
The chemical composition of the essential oils from the leaves and fruit of Eucalyptus camaldulensis grown in Mersin, Turkey was analyzed using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) techniques. The biological activities (antibacterial and antifungal) were examined using the agar well diffusion method. The main leaf oil constituents were p-cymene (42.1%), eucalyptol (1,8-cineole) (14.1%), α-pinene (12.7%) and α-terpinol (10.7%). The main constituents of the fruit oil were eucalyptol (1,8-cineole) (34...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28525357/a-dihydrochalcone-derivative-and-further-steroidal-saponins-from-sansevieria-trifasciata-prain
#18
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...
October 26, 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
#19
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...
October 26, 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
#20
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...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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