Yin, Yuling Ashihar, Hiroshi
Published in
Zeitschrift für Naturforschung C
The activities of glucose-6-phosphate dehydrogenase (G6PDH, EC 1.1.1.49) and 6-phosphogluconate dehydrogenase (6PGDH, EC 1.1.1.44) were found to increase in suspensioncultured Arabidopsis thaliana cells after 10-day-old stationary phase cells were transferred to fresh Murashige-Skoog medium. The activities of these enzymes peaked early in the expon...
El-Essawy, Farag A. El-Sayed, Wael A. El-Kafrawy, Sherif A. Morshedy, Asmaa S. Abdel-Rahman, Adel-H.
Published in
Zeitschrift für Naturforschung C
A number of 1,3,4-oxadiazole, 3 - 9, and 1,2,4-triazole derivatives, 13 - 15, were synthesized starting form the acid hydrazide 1. The 1,3,4-thiadiazole derivative 12 was prepared from the substituted phenylthiosemicarbazide derivative 11 by treatment with sulfuric acid. The aryl hydrazone derivatives 10a - c were synthesized by reaction of the hyd...
Santana, Omar Reina, Matías Anaya, Ana Luisa Hernández, Fidel Izquierdo, M. Elena González-Coloma, Azucena
Published in
Zeitschrift für Naturforschung C
In the context of the study on plant defensive compounds we have isolated the main alkaloid from Hippeastrum puniceum (Amaryllidaceae), 3-O-acetyl-narcissidine (1), and its biological activities tested against two divergent insect species and several plant species. 1 was isolated from the bioactive alkaloidal fraction of H. puniceum. Its chemical s...
Maneva, Ana Taleva, Borislava
Published in
Zeitschrift für Naturforschung C
The aim of the present study was to assess if some flavonic compounds (quercetin, piceatannol and apigenin) and ascorbic acid could interfere with the Lf stimulatory effect on the erythrocyte function. Quercetin (1.5 μm) and piceatannol (30 μm) showed an additive effect on Lf stimulation of Na+/K+-ATPase when used together with Lf. The enhancement ...
Katkovčinová, Zuzana Lázárová, Martina Bruňáková, Katarína Košuth, Ján Čellárova, Eva
Published in
Zeitschrift für Naturforschung C
The time-course of expression of dbat and dbtnbt genes involved in the later steps of paclitaxel biosynthesis and the intracellular taxane accumulation were investigated through a 64-day subculture interval of VI/M1 and VI/M2 Taxus baccata callus cultures. HPLC proved traces of baccatin III and an intracellular content of paclitaxel up to 90 μg/g D...
Wollenweber, Eckhard Fischer, Ralf Dörr, Marion Irvine, Kathryn Pereira, Cliff Stevens, Jan F.
Published in
Zeitschrift für Naturforschung C
The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species of Ozothamnus (Asteraceae, Gnaphalieae) have been analyzed for the presence of flavonoid aglycones and some other phenolics. A total of 55 flavonoids were identified, including several rare flavonols. Flavonols are prevailing over flavones, and 8-O-subs...
Monte Neto, Rubens L. Sousa, M. A. Dias, Celidarque S. Barbosa Filho, José M. Oliveira, Márcia R.
Published in
Zeitschrift für Naturforschung C
The in vitro cytotoxic potential of yangambin was evaluated. Yangambin is a pharmacologically active furofuran lignan obtained from the leaves of Ocotea duckei. It is the major compound from the lignoids fraction. Yangambin presented low cytotoxicity in all in vitro models analyzed. Its cytotoxicity to murine macrophages was measured by the Trypan ...
Zencir, Sevil Alptekin, Davut Celiktas, Medih Canturk, Pakize Colak, Deniz Caner, Vildan Luleyap, Umit H. Topcu, Zeki
Published in
Zeitschrift für Naturforschung C
Cytochrome P450 (CYP) is a heme-containing enzyme superfamily metabolizing a wide variety of xenobiotics, including drugs and carcinogens. The majority of CYP genes are expressed in the liver, however, some CYP isoforms are also reported for a number of extra hepatic tissues. We analyzed Cytochrome P450-2A6, -3A5 and -4B1 mRNAs using realtime rever...
Waterhouse, John S. Langley, Bridget Weldon, Paul J.
Published in
Zeitschrift für Naturforschung C
The dorsal gland secretions of captive-reared male and female Chacoan peccaries (Catagonus wagneri) were analyzed by gas chromatography-mass spectrometry. C8-C19 carboxylic acids, squalene, cholesterol, cholestanol, and cholest-7-en-3-ol were present in both males and females. Heptylbenzene, C14-C18 methyl esters, and an isomer of springene were ob...
Momen-Roknabadi, Nastaran Gohari, Ahamd R. Monsef-Esfehani, Hamid R. Attar, Farideh Hajiaghaee, Reza Saeidnia, Soodabeh Jamalifar, Hossein Kamalinia, Golnaz Shahverdi, Ahamd R.
Published in
Zeitschrift für Naturforschung C
The antimicrobial activity of ethanol and chloroform extracts of Pentanema divaricatum Cass. was studied using the conventional disk diffusion method. The extracts’ highest antimicrobial activity was observed against Aspergillus niger. Bioassay-guided fractionation of the crude extract by preparative thin layer chromatography (PTLC) showed one anti...
