You searched for:
Journal name
Zeitschrift für Naturforschung
Remove constraint Journal name: Zeitschrift für Naturforschung
Publication year rev
7986-2014
Remove constraint Publication year rev: 7986-2014
Source
2014 v.65 no.3-4
Remove constraint Source: 2014 v.65 no.3-4
PubAg
Main content area
Search
21 Search Results
« Previous |
1 - 20 of 21
|
Next »
Search Results
- Author:
- Penka Petrova; Milena Emanuilova; Kaloyan Petrov
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 218-224
- ISSN:
- 0939-5075
- Subject:
- Lactobacillus pentosus; Lactobacillus plantarum; amylases; beverages; carbon; enzyme activity; fermented foods; hydrolysis; lactic acid; lactic acid bacteria; lactic fermentation; meat extracts; pH; ribosomal DNA; starch; succinic acid; yeast extract; yeasts
- Abstract:
- ... The lactic acid fermentation is a worldwide method for cereal processing. Great diversity of fermented foods and drinks is produced with the participation of amylolytic lactic acid bacteria (ALAB). In the present study the ALAB content of the Bulgarian cereal beverage “boza” was investigated. Two strains, Bom 816 and N3, were found to possess significant amylolytic activity. The strains’ identific ...
- DOI:
- 10.1515/znc-2010-3-409
- https://doi.org/10.1515/znc-2010-3-409
- Author:
- Nurgun Kucukboyacı; Ilkay Orhan; Bilge Şener; S. Ahmad Nawaz; M. Iqbal Choudhary
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 187-194
- ISSN:
- 1865-7125
- Subject:
- Alzheimer disease; acetylcholinesterase; ions; Taxus baccata; 2,2-diphenyl-1-picrylhydrazyl; iron; linoleate 13S-lipoxygenase; chromatography; pathogenesis; lignans; cholinesterase; chlorogenic acid; antioxidant activity
- Abstract:
- ... Phytochemical investigations of Taxus baccata L. by successive chromatographic methods resulted in the isolation of the lignans lariciresinol (1), taxiresinol (2), 3´-demethylisolariciresinol- 9´-hydroxyisopropylether (3), isolariciresinol (4), and 3-demethylisolariciresinol (5) as well as taxoids. Compounds 1 - 5 were evaluated for their acetylcholinesterase (AChE), butyrylcholinesterase (BChE), ...
- DOI:
- 10.1515/znc-2010-3-404
- https://doi.org/10.1515/znc-2010-3-404
- Author:
- Katalin Molnár; Edit Farkas
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 157-173
- ISSN:
- 1865-7125
- Subject:
- Cyanobacteria; algae; analytical methods; antioxidant activity; chemotaxonomy; fungi; homeostasis; lichens; photostability; pollution; secondary metabolites; symbiosis; thallus
- Abstract:
- ... Lichens are symbiotic organisms of fungi and algae or cyanobacteria. Lichen-forming fungi synthesize a great variety of secondary metabolites, many of which are unique. Developments in analytical techniques and experimental methods have resulted in the identification of about 1050 lichen substances (including those found in cultures). In addition to their role in lichen chemotaxonomy and systemati ...
- DOI:
- 10.1515/znc-2010-3-401
- https://doi.org/10.1515/znc-2010-3-401
- Author:
- Juan Chou; Yinghua Huang
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 271-276
- ISSN:
- 1865-7125
- Subject:
- Schizaphis graminum; Sorghum (Poaceae); actin; agarose; complementary DNA; gels; gene expression; gene expression regulation; genes; insects; messenger RNA; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; transcription (genetics)
- Abstract:
- ... This study was designed to quantitatively analyze the expression of thaumatin-like protein (TLP) at the transcriptional level in different sorghum lines when they were infested with greenbugs. Three sorghum lines, Tx7000, PI550607, and PI550610, were used. RNAs were isolated from the different sorghum lines that were infested with greenbugs at different infestation times. The resultant mRNA was re ...
- DOI:
- 10.1515/znc-2010-3-416
- https://doi.org/10.1515/znc-2010-3-416
- Author:
- Kouichi Mizuno; Shin-ichi Kurosawa; Yuko Yoshizawa; Misako Kato
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 257-265
- ISSN:
- 1865-7125
- Subject:
- amino acid sequences; biochemical pathways; biosynthesis; caffeine; histidine; methylation; mutants; substrate specificity; theobromine
- Abstract:
- ... The caffeine biosynthetic pathway is composed of three methylation steps, and N-methyltransferase catalyzing each step has high substrate specificity. Since the amino acid sequences among coffee 7-methylxanthosine synthase (CmXRS1), theobromine synthase, and caffeine synthase are highly homologous to each other, these substrate specificities seem to be determined in a very restricted region. The a ...
- DOI:
- 10.1515/znc-2010-3-414
- https://doi.org/10.1515/znc-2010-3-414
- Author:
- Misako Kato; Naoko Kitao; Mariko Ishida; Hanayo Morimoto; Fumi Irino; Kouichi Mizuno
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 245-256
- ISSN:
- 1865-7125
- Subject:
- Camellia sinensis; Northern blotting; S-adenosylmethionine; biochemical pathways; biosynthesis; caffeine; dehydrins; flowers; gene expression; genes; heavy metals; leaf development; leaves; methionine adenosyltransferase; naringenin-chalcone synthase; nitrogen; phenylalanine ammonia-lyase; plant hormones; tea; water stress
- Abstract:
- ... Caffeine (1,3,7-trimethylxanthine) is a purine alkaloid that is present in high concentrations in the tea plant Camellia sinensis. Caffeine synthase (CS, EC 2.1.1.160) catalyzes the S-adenosyl-L-methionine-dependent N-3- and N-1-methylation of the purine base to form caffeine, the last step in the purine alkaloid biosynthetic pathway. We studied the expression profile of the tea caffeine synthase ...
- DOI:
- 10.1515/znc-2010-3-413
- https://doi.org/10.1515/znc-2010-3-413
- Author:
- Ataa Said; Rosa Tundis; Usama W. Hawas; Salah M. El-Kousy; Khaled Rashed; Federica Menichini; Marco Bonesi; Antje Huefner; Monica Rosa Loizzo
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 180-186
- ISSN:
- 1865-7125
- Subject:
- 2,2-diphenyl-1-picrylhydrazyl; Ailanthus excelsa; antioxidant activity; antioxidants; apigenin; cell growth; chemical composition; chromatography; humans; inhibitory concentration 50; kaempferol; leaves; luteolin; melanoma; methanol; quercetin; traditional medicine
- Abstract:
- ... The present study aimed to investigate the chemical composition, and the antioxidant and antiproliferative activities of Ailanthus excelsa, a plant used in Egyptian traditional medicine. Chromatographic separation of a methanol extract of A. excelsa leaves yielded four fl avones, namely apigenin (1), apigenin 7-O-β-glucoside (2), luteolin (3), and luteolin 7-O-β-glucoside (4), and seven fl avonols ...
- DOI:
- 10.1515/znc-2010-3-403
- https://doi.org/10.1515/znc-2010-3-403
- Author:
- Janapala Venkateswara Rao; Pathakoti Kavitha
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 303-306
- ISSN:
- 0939-5075
- Subject:
- Oreochromis mossambicus; acetylcholinesterase; brain; chlorpyrifos; diagnostic techniques; environmental monitoring; euryhaline species; neurotoxicity
- Abstract:
- ... The in vitro effect of a widely used organophosphorus insecticide, chlorpyrifos (CPP), on the acetylcholinesterase (AChE) activity was studied in vitro. The kinetic constants Kₘ and Vₘₐₓ and the bimolecular constant ki were determined in vitro. The in vitro AChE study indicated that CPP is neurotoxic and that it alters the apparent Kₘ values widely in a concentration-dependent manner, resulting in ...
- DOI:
- 10.1515/znc-2010-3-420
- https://doi.org/10.1515/znc-2010-3-420
- Author:
- Mitko I. Dimitrov; Anthony A. Donchev; Alexandra C. Shosheva; Vladimir I. Getov; Nedyalka P. Terezova; Svetozar D. Stoichev
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 225-230
- ISSN:
- 1865-7125
- Subject:
- Populus; absorbance; chromatography; dimorphism; isoelectric focusing; isoelectric point; pH; photosynthesis; plastocyanin; spectroscopy
- Abstract:
- ... An improved four-stage isolation and purification procedure for preparing poplar isoplastocyanins is described in detail. Absorbance (UV-VIS) spectroscopy and isoelectric focusing (IEF) are used to determine the protein purity and identity. The present procedure increases twice the total plastocyanin (PC) yield. Four PC isoform fractions are consecutively isolated at the third chromatographic step ...
- DOI:
- 10.1515/znc-2010-3-410
- https://doi.org/10.1515/znc-2010-3-410
- Author:
- Īsmail Poyraz; Emel Sözen; Muhittin Arslanyolu
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 266-270
- ISSN:
- 1865-7125
- Subject:
- isothiocyanates; Origanum onites; ambient temperature; guanidines; medicinal plants; isopropyl alcohol; ultracentrifugation; reverse transcription; RNA; tissues; leaves; phenolic compounds
- Abstract:
- ... We successfully used the guanidine isothiocyanate method for isolation of total RNA from leaf, stem, and root tissues of the aromatic plant Origanum onites. The RNA was extracted with TRI Reagent® at room temperature and was recovered by isopropanol precipitation. The isolated RNA was capable of reverse transcription. The extraction method described here does not require ultracentrifugation, and i ...
- DOI:
- 10.1515/znc-2010-3-415
- https://doi.org/10.1515/znc-2010-3-415
- Author:
- Atsumi Shimada; Shozo Fujioka; Hiroyuki Koshino; Yasuo Kimura
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 207-210
- ISSN:
- 0939-5075
- Subject:
- Bursaphelenchus xylophilus; Caenorhabditis elegans; Fusarium; Pinus; fungi; nematicidal properties; nematicides; spectral analysis
- Abstract:
- ... A nematicide, beauvericin (1), was isolated from cultures of the fungus Fusarium bulbicola, and its structure was identified by spectroscopic analysis. Compound 1 showed nematicidal activities against the pine wood nematode Bursaphelenchus xylophilus and the freeliving nematode Caenorhabditis elegans. ...
- DOI:
- 10.1515/znc-2010-3-407
- https://doi.org/10.1515/znc-2010-3-407
- Author:
- Anna Derekova; Miroslava Atanassova; Petya Christova; Bojidar Tchorbanov; Alexandra Shosheva; Rossitsa Mandeva; Patricia Rodríguez-Alonso; Jose I. Garabal; Margarita Kambourova
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 231-238
- ISSN:
- 1865-7125
- Subject:
- Geobacillus stearothermophilus; amino acids; circular dichroism spectroscopy; crystals; denaturation; differential scanning calorimetry; gel electrophoresis; heat production; molecular weight; thermal stability; thermophilic bacteria
- Abstract:
- ... A purified thermostable gellan lyase, produced by a thermophilic bacterium, Geobacillus stearothermophilus 98, was characterized in relation to its physicochemical properties. The gellan lyase was established to have a molecular weight of 216 kDa, defined by capillary gel electrophoresis. Amino acid analysis revealed high quantities of Lys, His, Ala, Val, Ile, Glx, and Pro residues. The circular d ...
- DOI:
- 10.1515/znc-2010-3-411
- https://doi.org/10.1515/znc-2010-3-411
- Author:
- Eman M. Gouda; Gamal S. Essawy
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 284-288
- ISSN:
- 1865-7125
- Subject:
- cell proliferation; chicken breeds; chickens; genes; genotype; growth traits; insulin-like growth factor I; liver; messenger RNA; phenotype; protein synthesis; reverse transcriptase polymerase chain reaction; single-stranded conformational polymorphism; Egypt
- Abstract:
- ... The insulin-like growth factor I (IGF-I) regulates growth, protein synthesis, and cell proliferation and differentiation in vertebrates. Polymorphisms of IGF-I gene transcripts of three breeds of chicken were assessed. The associations of these polymorphisms with the growth rate of the studied breeds were also evaluated. Total RNA was isolated from chicken livers, and the IGF-I gene was amplified ...
- DOI:
- 10.1515/znc-2010-3-418
- https://doi.org/10.1515/znc-2010-3-418
- Author:
- Izabela Jasicka-Misiak; Jacek Lipok; Izabela A. Świder; Paweł Kafarski
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 201-206
- ISSN:
- 1865-7125
- Subject:
- Betula; Fourier transform infrared spectroscopy; Hymenochaetaceae; antifungal properties; bark; betulin; betulinic acid; bioassays; cosmetics; emulsifiers; emulsifying; emulsions; fungi; gas chromatography-mass spectrometry; median effective concentration; medicine; microbial growth; nuclear magnetic resonance spectroscopy; nutmeg; pharmaceutical industry; trees; ultrasonics
- Abstract:
- ... Betulin and its derivatives (especially betulinic acid) are known to possess very interesting prospects for their application in medicine, cosmetics and as bioactive agents in pharmaceutical industry. Usually betulin is obtained by extraction from the outer layer of a birch bark. In this work we describe a simple method of betulin isolation from bark of various species of Betulaceae trees and para ...
- DOI:
- 10.1515/znc-2010-3-406
- https://doi.org/10.1515/znc-2010-3-406
- Author:
- Serkan Erdal; Rahmi Dumlupinar
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 239-244
- ISSN:
- 0939-5075
- Subject:
- Cicer arietinum; alpha-amylase; biochemical pathways; catalase; chickpeas; enzyme activity; hydrogen peroxide; lipid peroxidation; peroxidase; progesterone; roots; seed germination; seeds; shoots; superoxide dismutase
- Abstract:
- ... Effects of progesterone and β-estradiol on morphologic (germination velocity, root and shoot length) and biochemical (activities of α-amylase, superoxide dismutase, peroxidase and catalase, H₂O₂ content, lipid peroxidation) parameters during germination and post-germination stages of chickpea seeds were studied. The seeds germinated at various hormone concentrations (10 ⁻ ⁴, 10 ⁻ ⁶, 10 ⁻ ⁹, 10 ⁻ ¹ ...
- DOI:
- 10.1515/znc-2010-3-412
- https://doi.org/10.1515/znc-2010-3-412
- Author:
- Veselin Christov; Bozhanka Mikhova; Antoaneta Ivanova; Julianna Serly; Joseph Molnar; Dangaa Selenge; Amgalan Solongo; Nadezhda Kostova; Yadamsuren Gerelt-Od; Dimitar Dimitrov
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 195-200
- ISSN:
- 0939-5075
- Subject:
- Veratrum; alkaloids; nuclear magnetic resonance spectroscopy
- Abstract:
- ... Twelve steroidal alkaloids were isolated from four populations of Veratrum lobelianum Bernh. and Veratrum nigrum L. Full NMR data for veralosinine (1), and extensive ¹H NMR data for veralosine (3) and teinemine (5) are presented here for the first time. (±)-15-O-(2- Methylbutyroyl)germine (10) is undescribed up to now. The antiproliferative activities of veranigrine, veralosinine, and neogermitrin ...
- DOI:
- 10.1515/znc-2010-3-405
- https://doi.org/10.1515/znc-2010-3-405
- Author:
- Asuman K. Sen; Emin Karakas; Rahmi Bilaloglu
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 211-217
- ISSN:
- 1865-7125
- Subject:
- antibiotics; body weight; bone marrow; bone marrow cells; cytotoxicity; epirubicin; erythrocytes; mice; mutagens
- Abstract:
- ... The genotoxic effect of epirubicin, a semisynthetic anthracycline antibiotic which has been used as an anticancer drug, was investigated in vivo on bone marrow cells of Swiss albino mice using the micronucleus test. To determine the incidence of micronuclei, mice were injected intraperitoneally with the drug at single doses of 4, 6, 8, and 10 mg/kg body weight. Then, bone marrow was sampled 18, 24 ...
- DOI:
- 10.1515/znc-2010-3-408
- https://doi.org/10.1515/znc-2010-3-408
- Author:
- Hanaa M. Gaber; Amany S. Maghraby; Mohamed Bastawy Ahmed; Andreas Ruppel; Mahmoud M. Bahgat
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 289-302
- ISSN:
- 1865-7125
- Subject:
- B-lymphocytes; Schistosoma mansoni; T-lymphocytes; antigens; eggs; immune response; immunization; immunoglobulin A; immunoglobulin G; immunoglobulin M; lymph nodes; mice; parasites; peptides; splenocytes; thymocytes
- Abstract:
- ... Mice responses to immunization with Schistosoma mansoni antigens were investigated. Priming with cercarial antigen preparation (CAP) induced significant (P < 0.05) IgM, IgG, IgG2a, IgG2b, and IgA increases, while booster caused a significant IgG1 increase. A soluble worm antigen preparation (SWAP) caused significant IgG elevation. Priming with soluble egg antigen (SEA) caused significant IgM and I ...
- DOI:
- 10.1515/znc-2010-3-419
- https://doi.org/10.1515/znc-2010-3-419
- Author:
- Ye Pan; Keping Chen; Hengchuan Xia; Qin Yao; Lu Gao; Peng Lü; Huojuan; Yuanqing He; Lin Wang
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 277-283
- ISSN:
- 1865-7125
- Subject:
- extracellular space; invertebrates; Escherichia coli; growth factors; sequence alignment; polyacrylamide gel electrophoresis; reverse transcriptase polymerase chain reaction; Western blotting; insect larvae; mass spectrometry; Bombyx mori; molecular cloning; insect development; enzyme activity; exons; introns; chitinase
- Abstract:
- ... Imaginal disc growth factors (IDGF) play a key role in insect development, but their mechanism remains unclear. In this study, we cloned a novel IDGF gene in Bombyx mori and designated it as BmIDGF. We found that the BmIDGF gene contains eight exons and seven introns, encoding a peptide of 434 amino-acid residues. The protein was predicted to contain one conserved motif of the glycosyl hydrolases ...
- DOI:
- 10.1515/znc-2010-3-417
- https://doi.org/10.1515/znc-2010-3-417
- Author:
- Friedwardt Winterberg
- Source:
- Zeitschrift für Naturforschung 2014 v.65 no.3-4 pp. 307-308
- ISSN:
- 1865-7125
- Subject:
- electric field; magnetic fields; neoplasms
- Abstract:
- ... This communication is a theoretical consideration explaining the benefits to reduce tumour growth in situ by interaction of ultrasound and strong magnetic fields. No documentation is presented. ...
- DOI:
- 10.1515/znc-2010-3-421
- https://doi.org/10.1515/znc-2010-3-421