Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2007

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 11491 - 11520 of 14126

Full-Text Articles in Entire DC Network

Bio 2320 : Economic Botany - Role Of Plants In The World Economy, Biological Sciences Jan 2007

Bio 2320 : Economic Botany - Role Of Plants In The World Economy, Biological Sciences

Approved Course Proposals

No abstract provided.


Mat 2290g : Elementary Statistics, Honors, Mathematics And Computer Science Jan 2007

Mat 2290g : Elementary Statistics, Honors, Mathematics And Computer Science

Approved Course Proposals

No abstract provided.


The Effects Of Microwave Frequency Electromagnetic Fields On The Fecundity Of Drosophila Melanogaster, Emel Atli, Hacer Ünlü Jan 2007

The Effects Of Microwave Frequency Electromagnetic Fields On The Fecundity Of Drosophila Melanogaster, Emel Atli, Hacer Ünlü

Turkish Journal of Biology

In this study, the effects of microwave frequency electromagnetic fields (EMF) on the fecundity of Drosophila melanogaster were investigated. The Oregon strain females of Drosophila melanogaster were exposed to 10 GHz EMF continuously (3 h, 4 h and 5 h) and discontinuously (3 h exposure + 30 min interval + 3 h exposure). The fecundity of females were determined. In the 4 h and 5 h exposed groups, it was found a statistically significant decrease in mean fecundity as compared to the control (P < 0.05). There was a reduction in the 3 h and 3 + 3 h exposed groups but this reduction was not significant statistically (P > 0.05).


Expression Analysis Of Genes In The Nif Cluster Of Clostridium Beijerinckii, Murat Kasap, Jiann Shin Chen Jan 2007

Expression Analysis Of Genes In The Nif Cluster Of Clostridium Beijerinckii, Murat Kasap, Jiann Shin Chen

Turkish Journal of Biology

The nif genes of Clostridium beijerinckii NRRL B593 occupy a region of about 16 kilobases. Besides the two glnB-like genes, five other genes are interspersed between the nifNB and the nifVw genes. An expression analysis of the nif genes in nitrogen-fixing and non-nitrogen-fixing cells with probes generated from various regions of the nif cluster by northern blot analysis revealed the presence of four different transcripts in nitrogen-fixing cells. Two of these transcripts had the predicted sizes spanning from nifH to nifK and from nifVw to nifVa, respectively. The other two transcripts did not have the expected sizes, but they suggested …


Cytotoxic And Antitumor Potential Of Fagonia Cretica L., Ahsan Hussain, Muhammad Zia, Bushra Mirza Jan 2007

Cytotoxic And Antitumor Potential Of Fagonia Cretica L., Ahsan Hussain, Muhammad Zia, Bushra Mirza

Turkish Journal of Biology

According to traditional knowledge, Fagonia cretica has medicinal potential, especially against cancer and tumors. In the present study, this information was analyzed at laboratory level by performing cytotoxic, antitumor (potato disc) and DNA damage assay. Significant cytotoxic activity was found against brine shrimps at LD_50 118.89 ppm, while antitumor assay showed that the extract inhibited tumor induction on potato discs. Significant antitumor activity was found against all the tumor-inducing Agrobacterium strains tested (At6, At10 and At77), with maximum tumor inhibition (77.04%) against At10. However, the extract did not show any lethal activity against Agrobacterium tumefaciens strains, and furthermore, no DNA …


Blood, Serum Glucose And Renal Parameters In Lead-Loaded Albino Rats And Treatment With Some Chelating Agents And Natural Oils, Abd El Rahiem A. Ashour, Maged M. Yassin, Nahed M. Abu Aasi, Rokaya M. Ali Jan 2007

Blood, Serum Glucose And Renal Parameters In Lead-Loaded Albino Rats And Treatment With Some Chelating Agents And Natural Oils, Abd El Rahiem A. Ashour, Maged M. Yassin, Nahed M. Abu Aasi, Rokaya M. Ali

Turkish Journal of Biology

This study investigated lead impact on blood, serum glucose and kidney function and the efficacy of treatment with chelating agents meso-2,3-dimercaptosuccinic acid (DMSA), calcium disodium ethylenediaminetetraacetic acid (CaNa_2-EDTA) and natural olive and garlic oils to reduce lead toxicity in albino rats. Oral administration of 1000 or 2000 ppm lead acetate significantly decreased red blood cell count, hemoglobin level and hematocrit value at 20, 40 and 60 days compared with control groups (rats administered deionized water and 1000 or 2000 ppm sodium acetate). Serum glucose was also decreased significantly with both doses of lead acetate administration. In contrast, serum urea, uric …


Variation Of Callus Induction Through Anther Culture In Water Chestnut (Trapa Sp.), Aminul Hoque, Manosh Kumar Biswas, Shamiul Alam Jan 2007

Variation Of Callus Induction Through Anther Culture In Water Chestnut (Trapa Sp.), Aminul Hoque, Manosh Kumar Biswas, Shamiul Alam

Turkish Journal of Biology

Effects of culture media and genotypes of water chestnut (Trapa sp.) on the frequency of callus induction from anther culture were investigated. Results revealed that the N_6 media supplemented with 0.5 mg/l BA, 0.5 mg/l NAA and 0.1 mg/l GA_3 were suitable for callus induction. Callus yielded poorly in MS-containing media compared to that of N_6 media. No callus was induced on 2, 4-D containing media. Among the tested 18 genotypes, only 15 genotypes produced calli.


The Growth Of Spirulina Platensis In Different Culture Systems Under Greenhouse Condition, Tolga Göksan, Ayşegül Zekeri̇yaoğlu, İlknur Ak Jan 2007

The Growth Of Spirulina Platensis In Different Culture Systems Under Greenhouse Condition, Tolga Göksan, Ayşegül Zekeri̇yaoğlu, İlknur Ak

Turkish Journal of Biology

We aimed in this experiment to compare the growth characteristics of Spirulina, which was cultivated in different culture vessels under greenhouse condition. Three types of culture vessels, i.e. transparent jars, polyethylene bags and raceway ponds, were used in the experiment. The jar cultures supported higher cell densities due to their higher culture temperature compared to the others. The dry weight amount in jar cultures was 0.99 g L^{-1} at the end of the experiment, while it was 0.5 g L^{-1} in the others. Specific growth rates were found to be 0.32, 0.21 and 0.20 day^{-1} in the jar, bag and …


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Molecular Characterization Of Borrelia Burgdorferi Linear Plasmids By Dna Hybridization, Pcr, Two-Dimensional Gel Electrophoresis, And Electron Microscopy, Ali̇ Karami, Seyed Javad Hosseyni, Yaser Kiarudi Jan 2007

Molecular Characterization Of Borrelia Burgdorferi Linear Plasmids By Dna Hybridization, Pcr, Two-Dimensional Gel Electrophoresis, And Electron Microscopy, Ali̇ Karami, Seyed Javad Hosseyni, Yaser Kiarudi

Turkish Journal of Biology

Borrelia burgdorferi sensu stricto is the predominant cause of Lyme disease. B. burgdorferi strains carry several linear and circular plasmids and this may be also used as a distinguishing property of the bacteria. The presence of a mixed population of linear and circular plasmids makes separation and characterization of each kind very difficult. In this study, 7 clinical strains of skin and CSF isolates were determined by clonal selection and plasmid profile of B. burgdorferi by electron microscopy and 2-dimensional agarose gel electrophoresis. The results demonstrate that the skin isolate (DK1) has 2 different phenotypes A and B, but the …


Photosynthetic And Yield Responses Of Nigella Sativa L. To Pre-Sowing Seed Treatment With Ga3, Shoukat H. Shah Jan 2007

Photosynthetic And Yield Responses Of Nigella Sativa L. To Pre-Sowing Seed Treatment With Ga3, Shoukat H. Shah

Turkish Journal of Biology

Surface sterilized seeds of black cumin (Nigella sativa L.) were soaked in 10^{-6}, 10^{-5}, or 10^{-4} M aqueous solution of gibberellic acid (GA_3) for 5, 10, or 15 h and sown in pots with sandy loam soil. The plants were then sampled at 50, 70, and 90 days after sowing, for the analysis of shoot length, leaf area, dry mass, carbonic anhydrase activity (E.C. 4.2.1.1), leaf chlorophyll content, stomatal conductance, and net photosynthetic rate. Seed yield was recorded at harvest (130 DAS). All parameters were found to be significantly enhanced by the hormone (GA_3) treatment, with maximum stimulation being noted …


What Is The Relationship Within The Family Lamnidae?, Mi̇ne Dosay Akbulut Jan 2007

What Is The Relationship Within The Family Lamnidae?, Mi̇ne Dosay Akbulut

Turkish Journal of Biology

Uncertainties remain about the relationship within the family Lamnidae, which includes the white shark, 2 makos, the porbeagle, and salmon shark. Several alternative hypotheses have been suggested related to the Lamnidae phylogeny. The aim of this study was to find an accurate answer to the family Lamnidae interrelationship. To that extend, the mitochondrial cytochrome b gene was studied in all the Lamnidae species and 2 outgroups from the families Alopiidae and Odontaspididae. The monophyly of 2 makos were obtained from both DNA and amino acid (AA) parsimony analysis. Based on our analysis, first the white shark joins this group, which …


Defoliation Effects On Sunflower (Helianthus Annuus L.) Seed Yield And Oil Quality, Sabri̇ Erbaş, Hasan Baydar Jan 2007

Defoliation Effects On Sunflower (Helianthus Annuus L.) Seed Yield And Oil Quality, Sabri̇ Erbaş, Hasan Baydar

Turkish Journal of Biology

The objective of the present study was to determine the influence of artificial defoliation on sunflower seed yield, oil content, and fatty acid composition. The research was carried out at Süleyman Demirel University, Isparta, Turkey, during 2002 and 2003. Six defoliation levels [0 (control), 5, 10, 15, 20 and 25 leaves per plant] were applied at the preflowering stage from bottom to top leaves. The results demonstrate a close relationship between yield reduction and the defoliation levels. The higher the defoliation level, the higher the yield reduction. Complete and partial leaf removal treatments reduced oil percentage of seed when compared …


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Changes In Growth, Biochemical Constituents, And Antioxidant Potentials In Radish (Raphanus Sativus L.) Under Cobalt Stress, Kaliyamoorthy Jayakumar, Cheruth Abdul Jaleel, Packirisamy Vijayarengan Jan 2007

Changes In Growth, Biochemical Constituents, And Antioxidant Potentials In Radish (Raphanus Sativus L.) Under Cobalt Stress, Kaliyamoorthy Jayakumar, Cheruth Abdul Jaleel, Packirisamy Vijayarengan

Turkish Journal of Biology

The effects of cobalt (Co) stress on seedling vigor, photosynthetic pigment content, biochemical constituents, mineral status, and the activity of antioxidant enzymes in Raphanus sativus L. were studied. The plants were raised in earthen pots containing soils amended with different concentrations of Co (50, 100, 150, 200, and 250 mg kg^{-1}). Growth parameters (root and shoot length, and total leaf area), photosynthetic pigments content (chlorophyll a, chlorophyll b, and total chlorophyll), biochemical constituents (total sugar, amino acid, and protein content), mineral content (macro- and micronutrients), and the activity of antioxidant enzymes (catalase (CAT), peroxidase (POX), and polyphenol oxidase (PPO)) were …


Cadmium-Induced Changes In The Growth And Carbonic Anhydrase Activity Of Chickpea, Syed Aiman Hasan, Barket Ali, Shamsul Hayat, Aqil Ahmad Jan 2007

Cadmium-Induced Changes In The Growth And Carbonic Anhydrase Activity Of Chickpea, Syed Aiman Hasan, Barket Ali, Shamsul Hayat, Aqil Ahmad

Turkish Journal of Biology

The seedlings of Cicer arietinum, grown in sand culture, were supplied with 0, 50, 100 or 150 µM of cadmium in the form of cadmium chloride at 5, 15 or 25 day stage and assessed for specific characteristics, 10 days after each treatment. It was a general observation in all the samplings that length, fresh and dry mass of both root and shoot and activity of carbonic anhydrase in leaf decreased, whereas proline content both in leaf and root increased. The intensity of the damage was proportionate with the concentration of the metal but was prominent at the earliest stage …


Effect Of Nigella Sativa Extract And Oil On Aflatoxin Production By Aspergillus Flavus, Anwar Maraqa, Najwa F. Al-Sharo'a, Husni Farah, Wafa M. Elbjeirami, Ashok K. Shakya, Abdul-Karim J. Sallal Jan 2007

Effect Of Nigella Sativa Extract And Oil On Aflatoxin Production By Aspergillus Flavus, Anwar Maraqa, Najwa F. Al-Sharo'a, Husni Farah, Wafa M. Elbjeirami, Ashok K. Shakya, Abdul-Karim J. Sallal

Turkish Journal of Biology

: Crude extract of Nigella sativa, N. sativa oil, ground coffee beans and caffeine were tested for their effects on aflatoxin production by Aspergillus flavus. Crude extract of N. sativa inhibited the production of three types of aflatoxins (B1, B2 and G1) at 5% (w/v) concentration, while N. sativa oil inhibited all four types of aflatoxins using 3% (v/v) concentration. However, coffee inhibited the production of B1, G1 and G2 aflatoxins at 6% (w/v), while caffeine inhibited only G1 and G2 aflatoxin. Our results suggest the investigated ingredients may have a significant fungal antitoxic activity which can be exploited as …


Antibacterial, Antifungal And Cytotoxic Activities Of Tuberous Roots Of Amorphophallus Campanulatus, Alam Khan, Moizur Rahman, Shariful Islam Jan 2007

Antibacterial, Antifungal And Cytotoxic Activities Of Tuberous Roots Of Amorphophallus Campanulatus, Alam Khan, Moizur Rahman, Shariful Islam

Turkish Journal of Biology

Antibacterial, antifungal and cytotoxic activities of ethanol extract of tuberous roots of Amorphophallus campanulatus were studied. Disc diffusion technique was used to determine in vitro antibacterial and antifungal activities. Cytotoxicity was determined against brine shrimp nauplii. In addition, minimum inhibitory concentration (MIC) was determined using serial dilution technique to determine antibacterial potency. The extract showed significant antibacterial activities against four gram-positive bacteria (Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, Streptococcus b-haemolyticus) and six gram-negative bacteria (Escherichia coli, Shigella dysenteriae, Shigella sonnei, Shigella flexneri, Pseudomonas aeruginosa, Salmonella typhi). The MIC values against these bacteria ranged from 16 to 128 µg/ml. The antifungal …


Genetic Identification Of Diploid And Tetraploid Wheat Species With Rapd Markers, Rami̇z Tagi̇ Ali̇yev, Mehraj Ali̇ Abbasov, Alamdar Charkaz Mammadov Jan 2007

Genetic Identification Of Diploid And Tetraploid Wheat Species With Rapd Markers, Rami̇z Tagi̇ Ali̇yev, Mehraj Ali̇ Abbasov, Alamdar Charkaz Mammadov

Turkish Journal of Biology

The genetic diversity of 10 diploid and tetraploid wheat species was estimated using random amplified polymorphic DNA (RAPD) markers. Two species from diploid [Triticum boeticum (wild), Triticum monococcum] and five from tetraploid wheats [Triticum dicoccoides var. arabicum (wild), Triticum dicoccum var. farrum, Triticum dicoccum var. atratum, Triticum durum var. hordeiforme (Bereketli 95), Triticum durum var. leucurum (Sharq), Triticum turgidum var. alboyadurum, Triticum turgidum var. salomonis and Triticum persicum] were included for the analyses. Jacard's cluster analysis algorithm was used to determine genetic similarities. There were two main classes in dendrogram: the varieties [T. boeticum, T. dicoccoides var. arabicum, T. dicoccum …


The Abundance Of Arbuscular Mycorrhizal Fungi Spores In Rhizospheres Of Different Crops, Ali Akbar Safari Sinegani, Zahed Sharifi Jan 2007

The Abundance Of Arbuscular Mycorrhizal Fungi Spores In Rhizospheres Of Different Crops, Ali Akbar Safari Sinegani, Zahed Sharifi

Turkish Journal of Biology

The number of spores of vesicular-arbuscular mycorrhizal (VAM) fungi occurring in the rhizospheric soil of 14 crops was investigated using traditional wet-sieving/decanting methods. The aim of the study was to determine the effect of some agronomy species (Gramineae, Leguminosae, Solanaceae, Labiatae, Cruciferae, Umbellifera, and Alliaceae) on VAM spores numbers in the rhizosphere. The agronomy species were planted under greenhouse conditions in pots containing semiarid soil. The number of spores in the rhizosphere of each species was studied at the middle and end of vegetative plant growth. In the middle of vegetative growth the number of spores increased significantly in the …


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Use Of Avicennia Marina (Forsk.) Vierh In The Control Of Root Knot Nematode Meloidogyne Javanica (Treub) Chitwood On Okra And Mash Bean, Marium Tariq, Shahnaz Dawar, Fatima S. Mehdi, Muhammad Javed Zaki Jan 2007

Use Of Avicennia Marina (Forsk.) Vierh In The Control Of Root Knot Nematode Meloidogyne Javanica (Treub) Chitwood On Okra And Mash Bean, Marium Tariq, Shahnaz Dawar, Fatima S. Mehdi, Muhammad Javed Zaki

Turkish Journal of Biology

Aqueous and ethanol extracts of Avicennia marina (Forsk.) Vierh. plant parts, namely leaves, stem and pneumatophore, were tested for their nematicidal activity against root knot nematode Meloidogyne javanica (Treub) Chitwood. Results showed that A. marina exerted more lethal effect in mortality of juveniles compared to hatching of juveniles. Stem showed more nematicidal effect compared to leaves and pneumatophore in aqueous extract, whereas pneumatophore showed more nematicidal activity in ethanol extract. Soil amendment at the rates of 0.1, 1 and 5% w/w was carried out with dried powder of leaves, stem and pneumatophore of A. marina for the control of root …


In Vitro Study Of Ethanolic Extract Of Hypericum Perforatum L. On Growth And Sporulation Of Some Bacteria And Fungi, Tanja Milosevic, Slavica Solujic-Sukdolak, Slobodan Sukdolak Jan 2007

In Vitro Study Of Ethanolic Extract Of Hypericum Perforatum L. On Growth And Sporulation Of Some Bacteria And Fungi, Tanja Milosevic, Slavica Solujic-Sukdolak, Slobodan Sukdolak

Turkish Journal of Biology

The antibacterial activity of an ethanolic extract of Hypericum perforatum L. was investigated against 8 Gram-negative bacteria (Pseudomonas fluorescens, Pseudomonas phaseolicola, Pseudomonas glycinea, Erwinia carotovora, Enterobacter cloacae, Klebsiella pneumoniae, Agrobacterium tumefaciens, Azotobacter chrococcum) and 2 Gram-positive bacteria (Bacillus mycoides, Bacillus subtilis) by the disc-diffusion and broth tube dilution methods. Ethanol was used for extraction of the plant. The species Pseudomonas glycinea and Azotobacter chrococcum showed extreme sensitivity to the extract of H. perforatum, while no effect was observed on bacteria Klebsiella pneumoniae. Minimum inhibitory concentration (MIC) of the ethanolic extract varied between 1.25 and 3.5 mg/ml. The antifungal activity of …


Screening Of Methanol And Acetone Extracts Of Fourteen Indian Medicinal Plants For Antimicrobial Activity, Yogeshkumar Vaghasiya, Sumitra Chanda Jan 2007

Screening Of Methanol And Acetone Extracts Of Fourteen Indian Medicinal Plants For Antimicrobial Activity, Yogeshkumar Vaghasiya, Sumitra Chanda

Turkish Journal of Biology

The methanol and acetone extracts of 14 plants belonging to different families were evaluated for antimicrobial activity against five Gram-positive bacteria: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus cereus, Bacillus subtilis, Micrococcus flavus; seven Gram-negative bacteria: Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Proteus vulgaris, Salmonella typhimurium, Citrobacter freundii; and three fungi: Candida tropicalis, Cryptococcus luteolus and Candida albicans. The in vitro antimicrobial activity was performed by agar disc diffusion method. The extractive yield was more in methanol than in acetone. The methanol extracts showed more antibacterial activity than acetone extracts. The most susceptible bacterium was K. pneumoniae and the most …


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Tumour Suppressor Function Of Rnase L In A Mouse Model, Wendy Liu, Shu Ling Liang, Hongli Liu, Robert Silverman, Aimin Zhou Jan 2007

Tumour Suppressor Function Of Rnase L In A Mouse Model, Wendy Liu, Shu Ling Liang, Hongli Liu, Robert Silverman, Aimin Zhou

Chemistry Faculty Publications

RNase L is one of the key enzymes involved in the molecular mechanisms of interferon (IFN) actions. Upon binding with its activator, 5′-phosphorylated, 2′-5′ oligoadenylates (2-5A), RNase L plays an important role in the antiviral and anti-proliferative functions of IFN, and exerts proapoptotic activity independent of IFN. In this study, we have found that RNase L retards proliferation in an IFN-dependent and independent fashion. To directly measure the effect of RNase L on tumour growth in the absence of other IFN-induced proteins, human RNase L cDNA was stably expressed in P-57 cells, an aggressive mouse fibrosarcoma cell line. Three clonal …


Research Summary: Young Adolescents’ Developmental Characteristics, Micki M. Caskey, Vincent A. Anfara Jr. Jan 2007

Research Summary: Young Adolescents’ Developmental Characteristics, Micki M. Caskey, Vincent A. Anfara Jr.

Curriculum and Instruction Faculty Publications and Presentations

Early adolescence is a distinct period of human growth and development situated between childhood and adolescence. During this remarkable stage of the life cycle, young adolescents (10- to 15-year-olds) experience rapid and significant developmental change. Recognizing and understanding the unique developmental characteristics (traits associated with human growth) of early adolescence and their relationship to the educational program (i.e., curriculum, instruction, and assessment) and to the structure of the middle school (e.g., fl exible block scheduling, advisory programs, and team teaching) are central tenets of middle grades education.


Reading, Writing, And Race: The Constitutionality Of Educational Strategies Designed To Teach Racial Literacy., Michael J. Kaufman Jan 2007

Reading, Writing, And Race: The Constitutionality Of Educational Strategies Designed To Teach Racial Literacy., Michael J. Kaufman

Faculty Publications & Other Works

No abstract provided.