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2003

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Articles 241 - 270 of 292

Full-Text Articles in Biology

Neuroepithelial Endocrine Cells In The Lung Of Rana Ridibunda: An Immunohistochemical Study, Füsun Öztay, Ayşe Tabakoğlu Oğuz Jan 2003

Neuroepithelial Endocrine Cells In The Lung Of Rana Ridibunda: An Immunohistochemical Study, Füsun Öztay, Ayşe Tabakoğlu Oğuz

Turkish Journal of Biology

In this study, neuroepithelial endocrine cells were for the first time identified in the lung of Rana ridibunda. The presence of these cells was investigated using endocrine markers by the immunohistochemical method at the light microscopic level. Immunoreactive - cells containing serotonin, calcitonin, met-enkephalin and leu-enkephalin were observed alone or in clusters within the respiratory epithelium. In general, clustered - cells containing serotonin were detected among the ciliated cells and goblet cells of the pseudostratified epithelium on apical dilation of the primary septa where the inhaled - air is first met. Among pneumocytes, single and clustered neuroepithelial endocrine cells display …

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Phospholipid And Triacylglycerol Fatty Acid Compositions From Various Development Stages Of Melanogryllus Desertus Pall. (Orthoptera: Gryllidae), Kadri̇ Bozkuş Jan 2003

Phospholipid And Triacylglycerol Fatty Acid Compositions From Various Development Stages Of Melanogryllus Desertus Pall. (Orthoptera: Gryllidae), Kadri̇ Bozkuş

Turkish Journal of Biology

Phospholipid and triacylglycerol fatty acid compositions from eggs; seventh, eighth and last nymphal stages; and 1, 20- and 40-day-old adult females of the black cricket, Melanogryllus desertus, grown in stock-culture medium under laboratory conditions were analyzed by gas chromatographic methods. A large amount of the fatty acid components at all the development stages of the insects analyzed comprised oleic, linoleic, palmitic and stearic acids. However, palmitoleic, myristic and linolenic acids were also found, at lower levels. There were fluctuations in fatty acid levels at different development stages, such as nymphs and adults. Oleic acid was lower in 1-day-old and older …

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Investigation Of The Antimicrobial Activity Of Some Streptomyces Isolates, Nuretti̇n Şahi̇n, Aysel Uğur Jan 2003

Investigation Of The Antimicrobial Activity Of Some Streptomyces Isolates, Nuretti̇n Şahi̇n, Aysel Uğur

Turkish Journal of Biology

Seventy-four different Streptomyces isolates were obtained from the soils of Muğla province. Antimicrobial activity was determined in 45.9% of the isolates. Fifteen isolates showed strong activity against coagulase-negative Staphylococcus (CoNS). These isolates were extensively studied for their in vitro antimicrobial activity against Gram-positive and Gram-negative bacteria and yeasts. The results indicated that five isolates were highly active against CoNS and yeast with an inhibition zone at ? 20 mm. Three of these isolates were identified as Streptomyces antibioticus (MU106, MU107) and S. rimosus (MU114). The UV spectra of the culture extracts for the active isolates showed absorbance peaks ranging between …

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Quorum Sensing In Gram-Negative Bacteria, Gülgün Boşgelmez Tinaz Jan 2003

Quorum Sensing In Gram-Negative Bacteria, Gülgün Boşgelmez Tinaz

Turkish Journal of Biology

It has become increasingly and widely recognised that bacteria do not live as isolated entities but instead exist as communities that exploit elaborate systems of intercellular communication to facilitate their adaptation to changing environmental conditions. A well-characterised example of such intercellular communication is quorum sensing. Quorum sensing depends on the production of diffusible signal molecules termed autoinducers or pheromones, which enable a bacterium to monitor its own cell population density. A variety of physiological processes in a range of bacterial species is regulated by quorum sensing. Examples include bioluminescence, antibiotic biosynthesis, swarming, biofilm differentiation, conjugation and the production of virulence …

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Adventitious Shoot Organogenesis And Plant Regeneration From Cotyledons Of Diploid Diyarbakır Watermelon (Citrullus Lanatus Cv. "Sürme"), Vedat Pi̇ri̇nç, Ahmet Onay, Fi̇li̇z Adiyaman, Çi̇ğdem Işikalan, Engi̇n Ti̇lkat, Davut Başaran Jan 2003

Adventitious Shoot Organogenesis And Plant Regeneration From Cotyledons Of Diploid Diyarbakır Watermelon (Citrullus Lanatus Cv. "Sürme"), Vedat Pi̇ri̇nç, Ahmet Onay, Fi̇li̇z Adiyaman, Çi̇ğdem Işikalan, Engi̇n Ti̇lkat, Davut Başaran

Turkish Journal of Biology

Adventitious shoots were obtained from the diploid Diyarbakır watermelon cultivar "Sürme" by culturing cotyledons on shoot regeneration medium for 3 weeks. The effects of two cytokinins, benzyl amino purine (BA) and kinetine (Kin), on shoot organogenesis were examined. The number of shoots per explant were approximately more than 50% higher when 0.5 mg/l BA was used compared to the most effective kinetin concentration (1 mg/l). Plants were obtained by transferring 1 to 2 cm shoots to MS medium supplemented with 1-4 mg/l naphthalene acetic acid. Most of the regenerated plants (more than 50%) were successfully transplanted to the field. This …

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Epipelic And Epilithic Algae Of Lower Parts Of Yanbolu River (Trabzon, Turkey), Bülent Şahi̇n Jan 2003

Epipelic And Epilithic Algae Of Lower Parts Of Yanbolu River (Trabzon, Turkey), Bülent Şahi̇n

Turkish Journal of Biology

The algae of Yanbolu River were investigated in samples collected from different habitats (epipelic, epilithic) at two stations between October 2000 and September 2001. The flora consisted of 78 taxa belonging to the Bacillariophyta (47 taxa), Cyanophyta (16 taxa), Chlorophyta (14 taxa) and Euglenophyta (1 taxon). The Bacillariophyta was the dominant form of algal flora. Amphora ovalis var. pediculus, Ceratoneis arcus, Cymbella affinis, C. minuta, Didymosphenia geminata, Melosira varians and Synedra ulna were the most frequent taxa in the algal flora. While the maximum density of the epipelic community was 29,555 cells/cm*2 at station I in June, it was 27,756 …

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Investigation Of The Microfungal Flora Of The Bird Paradise National Park In Bandırma, Balıkesir (Turkey), Ayşe Di̇lek Azaz Jan 2003

Investigation Of The Microfungal Flora Of The Bird Paradise National Park In Bandırma, Balıkesir (Turkey), Ayşe Di̇lek Azaz

Turkish Journal of Biology

Fifteen soil samples taken from the Bird Paradise National Park in Bandırma were investigated using the soil dilution plate and soil washing methods. Thirty-three species and four different sterile microfungal taxa were identified. Twenty-eight of these species belonged to the Hyphomycetes and 5 to the Mucorales. The genus with the highest species diversity found in the study area was Penicillium, represented by 16 species. Some chemical properties of the soil samples were also established. Quantitative analysis based on the soil dilution plate method revealed a statistically significant difference between soil samples subjected to the rising water level of the lake …

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Characterization Of Salivaricin B, A Protein Expressed By Lactobacillus Salivarius M7, Osman Çataloluk, Candan G. Gürakan Jan 2003

Characterization Of Salivaricin B, A Protein Expressed By Lactobacillus Salivarius M7, Osman Çataloluk, Candan G. Gürakan

Turkish Journal of Biology

Salivaricin B (SalB) is a protein encoded by Lactobacillus salivarius M7. This protein is insensitive to proteolytic enzymes, such as pepsin, trypsin, and chymotrypsin, but is partially sensitive to proteinase K. SalB is also stable and maintains its activity over a range of pHs, from 3 to 9. SalB was found to be effective against many closely related lactic acid bacteria such as, L. fermentum, L. plantarum, L. acidophilus and distantly related gram-positive bacteria, including Listeria monocytogenes, Streptococcus faecalis, Staphylococcus aureus and Staph. epidermidis. The mode of action of SalB was obviously bactericidal, and death occurs without bacterial lysis. The …

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Modification By Compositional Antimutagens Of The Key Stages Of A Mutation Process, Urkhan Alekperov, Ali Aliev, Afet Rustamova, Saida Jafarova Jan 2003

Modification By Compositional Antimutagens Of The Key Stages Of A Mutation Process, Urkhan Alekperov, Ali Aliev, Afet Rustamova, Saida Jafarova

Turkish Journal of Biology

In experiments with Escherichia coli B/r WP2(trpE-), mice marrow cells and human lymphocytes the antimutagenic activity of an extract from Zizyphus mill was performed. The extract was tested separately and in mixture with Triticum aestivum. In experiments with different treatment schemes it has been established that the extract from wheat sprouts added to an antimutagenic preparation from Zizyphus mill intensifies the genoprotective properties of the Zizyphus mill extract.

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The Effects Of Dietary Fatty Acids On The Fatty Acid Composition In The Phospholipid Fraction Of Gambusia Affinis, Eli̇f İpek Cengi̇z, Erhan Ünlü, Mehmet Başhan Jan 2003

The Effects Of Dietary Fatty Acids On The Fatty Acid Composition In The Phospholipid Fraction Of Gambusia Affinis, Eli̇f İpek Cengi̇z, Erhan Ünlü, Mehmet Başhan

Turkish Journal of Biology

The present study represents an investigation into the effect of dietary fatty acids on the fatty acid composition of the phospholipid fraction of Gambusia affinis, a small freshwater fish living in a source located on the campus of Dicle University. The fatty acid composition of the phospholipid fraction was analysed by gas chromatography for fish collected from the freshwater source, which were naturally fed, and also fish fed an artificial diet with a w6/w3 ratio of 5.5:1 for 30 days. The level of w3 in the fish fed artificially for 30 days was higher than in those collected from the …

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Evaluation Of The Reproductive Potential And Competition Between Two Entomopathogenic Nematodes, Steinernema Feltiae Filipjev, 1934 (Rhabditida: Steinernematidae) And Heterorhabditis Bacteriophora, Poinar 1976 (Rhabditida: Heterorhabditidae), Işik Oğuzoğlu Ünlü, Nurdan Özer Jan 2003

Evaluation Of The Reproductive Potential And Competition Between Two Entomopathogenic Nematodes, Steinernema Feltiae Filipjev, 1934 (Rhabditida: Steinernematidae) And Heterorhabditis Bacteriophora, Poinar 1976 (Rhabditida: Heterorhabditidae), Işik Oğuzoğlu Ünlü, Nurdan Özer

Turkish Journal of Biology

The emergence in Galleria mellonella (L.) larva, which was infected by Steinernema feltiae and Heterorhabditis bacteriophora, began on the ninth day after exposure to the former nematode and the sixth day of exposure to the latter nematode (25 ± 0.5 ºC). The average number of nematodes developing in each host was as 13,829, and the range was from 4365 to 27,510 for S. feltiae infection. The average number of nematodes per host was 141,562, and the range was 50,905 - 271,593 for H. bacteriophora infection. When the 2 different species were inoculated simultaneously into the same host, H. bacteriophora caused …

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The Effect Of Tannery Effluent On The Colonization Rate Of Plankters: A Microcosm Study, Yalavarthi Naga Koteswari, Ravichandran Ramanibai Jan 2003

The Effect Of Tannery Effluent On The Colonization Rate Of Plankters: A Microcosm Study, Yalavarthi Naga Koteswari, Ravichandran Ramanibai

Turkish Journal of Biology

The present study describes a multispecies toxicity test that uses community level responses of plankton samples from a natural lake using polyurythane foam (PF) as artificial substrate. These substrates were suspended and left for a period of 14 days. Colonized substrates were then placed in a series of microcosms dosed with a gradient of tannery effluent from 1 to 15% concentration. The species composition and abundance of the planktonic communities in PF substrate with the exposure of 4 different concentration of tannery effluent (1%, 3%, 5% and 15%) were assessed on days 1, 3, 7, 14, 21 and 28. Species …

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Classification Of Strains Of Bacillus Sphaericus By Different Statistical Methods, Nazi̇me Mercan, Atalay Çağlar, Belma Aslim, Yavuz Beyatli Jan 2003

Classification Of Strains Of Bacillus Sphaericus By Different Statistical Methods, Nazi̇me Mercan, Atalay Çağlar, Belma Aslim, Yavuz Beyatli

Turkish Journal of Biology

In this study, the sensitivies of 21 strains of Bacillus sphaericus to 20 different antibiotics were determined with the antibiotic disc susceptibility test. By measuring the diameters of the inhibition zones in terms of millimetres, the obtained values were analysed using the SPSS for Windows package and classifications were made. With these analyses, 21 strains were clustered into 5 groups. In our study, strains IAB 59 and 2297 were placed into a separate class. In addition, those antibiotics which caused a differentation in strains and a discrimination of strains according to the level of antibiotic effect were determined.

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Host Finding Behavior Of Two Different Turkish Isolates Of Entomopathogenic Nematode Species, Heterorhabditis Bacteriophora, Poinar 1976 (Rhabditida: Heterorhabditidae), İ. Alper Susurluk, Işik O. Ünlü, İlker Kepenekci̇ Jan 2003

Host Finding Behavior Of Two Different Turkish Isolates Of Entomopathogenic Nematode Species, Heterorhabditis Bacteriophora, Poinar 1976 (Rhabditida: Heterorhabditidae), İ. Alper Susurluk, Işik O. Ünlü, İlker Kepenekci̇

Turkish Journal of Biology

The movement of 2 different isolates of an insect parasitic nematode species (Heterorhabditis bacteriophora Tur-H2 and H. bacteriophora Tur-H1) in vertical columns was tested under laboratory conditions. We have found significant differences in the movements of H. bacteriophora Tur-H2 and H. bacteriophora Tur-H1 towards the Galleria mellonella larvae as a host. The maximum nematode infection rate inside the host was observed on the third day of the trial period for both species. We have recorded the number and the given percentage of infective juveniles (IJs) of H. bacteriophora Tur-H2 that moved towards the G. mellonella larvae within 24, 48, 72, …

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Melatonin Implants Have No Effect On The Testis Volume And Body Weight In Mongolian Gerbils, Alper Karakaş, Bülent Gündüz Jan 2003

Melatonin Implants Have No Effect On The Testis Volume And Body Weight In Mongolian Gerbils, Alper Karakaş, Bülent Gündüz

Turkish Journal of Biology

Photoperiod is an important environmental cue in the regulation of reproductive activity in Mongolian gerbils. Photoperiodic information is ultimately transduced into a hormonal signal by the pineal gland. We examined the effect of constant-release melatonin capsules on the testicular size and body weights of male Mongolian gerbils exposed to a long (14L: 10D) photoperiod. Three groups were formed: control (n = 10), intact + melatonin implant (n = 10) and pinealectomy + melatonin implant (n = 10). The testes and body weights of the gerbils were recorded every week for 8 weeks. Body weights (76 ± 2.0 g intact + …

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Failure Of Regeneration Of Sensory Nerve Fibers Following Neonatal Denervation And Crush Lesion In Rats, Jumah Shakhanbeh, Khaled Khleifat Jan 2003

Failure Of Regeneration Of Sensory Nerve Fibers Following Neonatal Denervation And Crush Lesion In Rats, Jumah Shakhanbeh, Khaled Khleifat

Turkish Journal of Biology

The effects of chronic neonatal denervation and a crush lesion on the regenerative capacity of sensory nerve fibers were studied in rats. After 50 weeks of postnatal denervation, the amplitudes of compound action potentials (CAPs) of A\alpha\beta-, A\delta- and C-fibers were reduced to 14.3%, 18.2% and 37.4%, respectively (P < 0.005). Similarly, after a crush lesion, the amplitudes of CAPs were reduced to 34.3%, 38.8% and 51.6%, respectively (P < 0.005). The conduction velocities, thresholds and maximum strength of stimulation of nerve fibers were normal. Neurogenic plasma extravasation into the skin due to antidromic nerve stimulation was reduced to 27.5% and 30.3% after postnatal denervation and the crush lesion, respectively (P < 0.005). These results indicate that neonatal sensory nerve injury induces permanent neurodegeneration of peripheral sensory nerve fibers as demonstrated by the inhibition of afferent conduction property and efferent neurogenic plasma extravasation response.

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The Analysis Of Partial Dominance Of Intragenic Mutations At The Adh Locus In Drosophila Melanogaster At Two Different Alcohol Concentrations, Vatan Taşkin Jan 2003

The Analysis Of Partial Dominance Of Intragenic Mutations At The Adh Locus In Drosophila Melanogaster At Two Different Alcohol Concentrations, Vatan Taşkin

Turkish Journal of Biology

The dominance of a de novo mutation determines its effect on the viability of the first and succeeding generations; therefore, it is a major factor in estimating the risk from mutations to human health. It is well established that large deletions lead to significant dominance, but until the recent development of molecular methods for amplification and sequencing of mutations it was not possible to determine the dominance of specific intragenic changes in DNA. The purpose of this study was to determine the dominance for a series of Adh-null mutations, each with a minimum mutation of a transition at one base …

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Analysis Of The Effects Of Transcription Factors Gcr2p And Sgc1p On The Control Of The Suc2 Gene Expression In Saccharomyces Cerevisiae, Sezai̇ Türkel, Tülay Turgut, İpek Savaşçioğlu Jan 2003

Analysis Of The Effects Of Transcription Factors Gcr2p And Sgc1p On The Control Of The Suc2 Gene Expression In Saccharomyces Cerevisiae, Sezai̇ Türkel, Tülay Turgut, İpek Savaşçioğlu

Turkish Journal of Biology

The transcription of the SUC2 gene is regulated by glucose repression and the derepression mechanism in the yeast Saccharomyces cerevisiae. The Mig1p-Tup1p-Ssn6p repressor complex, hexokinase PII and nucleosomes are required for the repression of the SUC2 gene. The Snf/Swi and SAGA complexes act on Mig1p and nucleosomes in low glucose media. SUC2 transcription thus becomes activated. In this study, it is shown that the transcription factors Gcr2p and Sgc1p are also required for the high level transcription of the SUC2 gene. SUC2 transcription and the invertase synthesis decreased at significant levels in gcr2 and sgc1 mutant yeast cells. In addition, …

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Anti-Genotoxic Effect Of Ascorbic Acid On Mutagenic Dose Of Three Alkylating Agents, Bülent Kaya Jan 2003

Anti-Genotoxic Effect Of Ascorbic Acid On Mutagenic Dose Of Three Alkylating Agents, Bülent Kaya

Turkish Journal of Biology

The antimutagenic effect of ascorbic acid (vitamin C) was investigated by using the Drosophila wing spot test. In this assay, 3-day-old transheterozygous larvae for the multiple wing hair (mwh, 3-0.3) and flare (flr, 3-38.8) genes were treated with 3 direct acting mutagens: ethyl methanesulfonate (EMS), methyl methanesulfonate (MMS) and N-nitroso N-ethylurea (ENU). The results obtained from 3 reference mutagens were clearly genotoxic in the Drosophila wing somatic mutation and recombination test. The calculated concentration of ascorbic acid as recommended dietary allowance (RDA) did not induce the frequency of the mutant clones recorded. When co-treatment experiments with ascorbic acid were carried …

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Isolation Of Trichoderma Spp. And Determination Of Their Antifungal, Biochemical And Physiological Features, Çi̇ğdem Küçük, Meri̇h Kivanç Jan 2003

Isolation Of Trichoderma Spp. And Determination Of Their Antifungal, Biochemical And Physiological Features, Çi̇ğdem Küçük, Meri̇h Kivanç

Turkish Journal of Biology

It is well known that Trichoderma spp. can be used as a biological control agent. In this study, Trichoderma isolates were obtained from 31 different Eskisehir soil samples. The biocontrol and antifungal effects of these isolates against various plant pathogen fungi were determined. We found that all filtrates of Trichoderma harzianum T9, T10, T15 and T19 were effective against plant pathogens Fusarium culmarum, F. oxysporum, F. moniliforme, Rhizoctonia solani, Sclerotium rolfsii, Gaeumannomyces graminis var. tritici and Drechslera sorokiniana. Among these isolates, T. harzianum T19 showed a wide range of inhibitory effects on plant pathogens. F. oxysporum was found to be …

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Antimicrobial Activity Of Viscum Album L. Subsp. Abietis (Wiesb), Ömer Ertürk, Hati̇ce Kati, Nuretti̇n Yayli, Zi̇hni̇ Demi̇rbağ Jan 2003

Antimicrobial Activity Of Viscum Album L. Subsp. Abietis (Wiesb), Ömer Ertürk, Hati̇ce Kati, Nuretti̇n Yayli, Zi̇hni̇ Demi̇rbağ

Turkish Journal of Biology

Viscum album L. subsp. abietis (Wiesb.) (Loranthaceae) is extensively used for treatment in traditional medicine. This plant was collected in the region of Artvin, northern Turkey. Different concentrations of n-hexane extract were tested using the agar diffusion technique against 6 bacteria (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterobacter cloacae and Proteus vulgaris), and 1 fungus (Candida albicans). We determined that fractions 6 and 7 of n-hexane extract of V. album subsp. abietis showed antimicrobial activity against the micro-organisms tested.

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Leptodactylus Mystacinus, M. M. Heyer, W. R. Heyer, Rafael O. De Sá Jan 2003

Leptodactylus Mystacinus, M. M. Heyer, W. R. Heyer, Rafael O. De Sá

Biology Faculty Publications

Adult Leptodactylus mystacinus are of moderate size, the head is as wide as long, and the hind limbs are moderately short (see Table; Heyer and Thompson 2000 provided definitions of adult size and leg length categories for Leptodactylus). Male vocal sacs are not visible externally or at best are weakly expanded laterally and slightly darker than female throats. Male snouts are more spatulate than those of females. Male forearms are not hypertrophied. Males lack asperities on the thumbs and chest. One or two pairs of dorsolateral folds (indicated by dark/light outlining in indifferently preserved specimens) are present: one …

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The Reactive Genome, Scott F. Gilbert Jan 2003

The Reactive Genome, Scott F. Gilbert

Biology Faculty Works

No abstract provided.

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The Role Of Predator-Induced Polyphenism In The Evolution Of Cognition: A Baldwinian Speculation, Scott F. Gilbert Jan 2003

The Role Of Predator-Induced Polyphenism In The Evolution Of Cognition: A Baldwinian Speculation, Scott F. Gilbert

Biology Faculty Works

No abstract provided.

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Regression Approaches For Microarray Data Analysis, Mark R. Segal, Kam D. Dahlquist, Bruce R. Conklin Jan 2003

Regression Approaches For Microarray Data Analysis, Mark R. Segal, Kam D. Dahlquist, Bruce R. Conklin

Biology Faculty Works

A variety of new procedures have been devised to handle the two sample comparison (e.g., tumor versus normal tissue) of gene expression values as measured with microarrays. Such new methods are required in part because of some defining characteristics of microarray-based studies: (i) the very large number of genes contributing expression measures which far exceeds the number of samples (observations) available, and (ii) the fact that by virtue of pathway/network relationships, the gene expression measures tend to be highly correlated. These concerns are exacerbated in the regression setting, where the objective is to relate gene expression, simultaneously for multiple genes, …

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Mappfinder: Using Gene Ontology And Genmapp To Create A Global Gene-Expression Profile From Microarray Data, Scott W. Doniger, Nathan Salomonis, Kam D. Dahlquist, Karen Vranizan, Steven C. Lawlor, Bruce R. Conklin Jan 2003

Mappfinder: Using Gene Ontology And Genmapp To Create A Global Gene-Expression Profile From Microarray Data, Scott W. Doniger, Nathan Salomonis, Kam D. Dahlquist, Karen Vranizan, Steven C. Lawlor, Bruce R. Conklin

Biology Faculty Works

MAPPFinder is a tool that creates a global gene-expression profile across all areas of biology by integrating the annotations of the Gene Ontology (GO) Project with the free software package GenMAPP (http://www.GenMAPP.org). The results are displayed in a searchable browser, allowing the user to rapidly identify GO terms with over-represented numbers of geneexpression changes. Clicking on GO terms generates GenMAPP graphical files where gene relationships can be explored, annotated, and files can be freely exchanged.

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Thicker Than Blood: Conserved Mechanisms In Drosophila And Vertebrate Hematopoiesis, Cory J. Evans, Volker Hartenstein, Utpal Banerjee Jan 2003

Thicker Than Blood: Conserved Mechanisms In Drosophila And Vertebrate Hematopoiesis, Cory J. Evans, Volker Hartenstein, Utpal Banerjee

Biology Faculty Works

Blood development in Drosophila melanogaster shares several interesting features with hematopoiesis in vertebrates, including spatiotemporal regulation as well as the use of similar transcriptional regulators and signaling pathways. In this review, we describe what is known about hematopoietic development in Drosophila and the various cell types generated and their functions. Additionally, the molecular genetic mechanisms of hematopoietic cell fate determination and commitment within Drosophila blood cell lineages are discussed and compared to vertebrate mechanisms.

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"Autapomorphies Of The Endophragmal System In Trichodactylid Freshwater Crabs" , Richard V. Sternberg, Neil Cumberlidge Jan 2003

"Autapomorphies Of The Endophragmal System In Trichodactylid Freshwater Crabs" , Richard V. Sternberg, Neil Cumberlidge

Journal Articles

No abstract provided.

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"Les Crustacés Décapodes Du Nimba Et Sa Région" , Neil Cumberlidge, Denise Huguet Jan 2003

"Les Crustacés Décapodes Du Nimba Et Sa Région" , Neil Cumberlidge, Denise Huguet

Journal Articles

No abstract provided.

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Perfecting The Match: The Visual Economy Of Egg Donation, Katherine M. Boulay Jan 2003

Perfecting The Match: The Visual Economy Of Egg Donation, Katherine M. Boulay

Doctoral

This thesis is a response to the absence of discussion in feminist and cultural studies of Assisted Reproductive Technology’s (ART) increasing utilisation of visuality and technology as complementary legitimating discourses. While critiques of the epistemologies and practices undergirding ART point to the fact that imaging technologies are used to reveal knowledge held in bodies, lacking in current theoretical work on ART, however, is an ethnographic engagement with how visual technologies actually produce the internal and externalscapes of these bodies, and knowledges about them. Mapping selective visual knowledges and technologies constitutive of the ART egg donation, the thesis engages with disparate …

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