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2014

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Articles 21601 - 21630 of 25853

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In Vitro Regeneration And Conservation Of The Lentisk (Pistacia Lentiscus L.), İbrahi̇m Koç, Ahmet Onay, Yelda Özden Çi̇ftçi̇ Jan 2014

In Vitro Regeneration And Conservation Of The Lentisk (Pistacia Lentiscus L.), İbrahi̇m Koç, Ahmet Onay, Yelda Özden Çi̇ftçi̇

Turkish Journal of Biology

Pistacia lentiscus L. (lentisk or mastic tree) is an economically important member of the genus Pistacia due to its valuable mastic resin. Shoot tips and nodal segments were used as explant sources from in vitro-germinated seeds of lentisk. Shoot tips were found to be suitable for multiple shoot formation. Thereafter, the influences of different growth regulators [N6-benzyladenine (BA), gibberellic acid (GA_3), naphthalene acetic acid (NAA), or jasmonic acid (JA)] together with various elicitors [silver nitrate (AgNO_3) or phloroglucinol (PG)] were assessed to develop efficient micropropagation protocol. Our results showed that the combination of all tested concentrations of GA_3 with 1.0 …

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Potential Of Moringa Oleifera L. As Livestock Fodder Crop: A Review, Wasif Nouman, Shahzad Maqsood Ahmed Basra, Muhammad Tahir Siddiqui, Azra Yasmeen, Tehseen Gull, Maria Angelica Cervantes Alcayde Jan 2014

Potential Of Moringa Oleifera L. As Livestock Fodder Crop: A Review, Wasif Nouman, Shahzad Maqsood Ahmed Basra, Muhammad Tahir Siddiqui, Azra Yasmeen, Tehseen Gull, Maria Angelica Cervantes Alcayde

Turkish Journal of Agriculture and Forestry

Dairy and meat production in dry regions is very complex due to low quality and shortage of fodder, especially in dry periods. Livestock scientists are eager to explore and investigate good-quality fodders that can boost milk and meat production in an organic and economical way. Some organic meals like soybean, cotton seed cake, and range grasses are being utilized to overcome the fodder shortage. These have some limitations, however, like unavailability in December through May as currently green fodder is least available after wheat, alfalfa, brassica, and maize harvesting. This leads towards reduced livestock production and low-quality milk and meat …

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Transferability Of Ssr Markers From Distantly Related Legumes To Glycyrrhiza Species, Mustafa Erayman, Emre İlhan, Yelda Güzel, Abdi̇l Hakan Eren Jan 2014

Transferability Of Ssr Markers From Distantly Related Legumes To Glycyrrhiza Species, Mustafa Erayman, Emre İlhan, Yelda Güzel, Abdi̇l Hakan Eren

Turkish Journal of Agriculture and Forestry

Licorice (Glycyrrhiza spp.) is an important medicinal plant and its distribution of natural habitats has been shrinking day by day due to extensive collection. Genetic diversity identification will likely assist in conserving the different Glycyrrhiza species. A total of 127 simple sequence repeat (SSR) markers from Medicago truncatula Gaertn., Phaseolus vulgaris L., and Cicer arietinum L. were used and 26 of them were amplified on Glycyrrhiza genomes. The highest transferability rate (33%) was obtained from M. truncatula markers, while the highest genetic diversity values were obtained in P. vulgaris markers. The markers BM153 and PV-ag004 from P. vulgaris had the …

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Xanthium Strumarium L. Impact On Corn Yield And Yield Components, Zahid Hussain, Khan Bahadar Marwat, John Cardina, Ijaz Ahmad Khan Jan 2014

Xanthium Strumarium L. Impact On Corn Yield And Yield Components, Zahid Hussain, Khan Bahadar Marwat, John Cardina, Ijaz Ahmad Khan

Turkish Journal of Agriculture and Forestry

Xanthium strumarium L. is a major weed affecting flour corn in Khyber Pakhtunkhwa Province of Pakistan. Studies conducted in 2006 and 2007 evaluated corn yield and yield component responses to competition from X. strumarium over a range of corn populations (5, 7.5, 10, and 12.5 plants m^{-2}) and X. strumarium densities (0, 2, 4, 6, 8, 10, and 12 plants m^{-2}). Flour corn yield and yield components (grains ear^{-1}, 1000-grain weight, harvest index, and days to silking) were significantly correlated with and affected by corn population, weed density, and the interaction between them. The percent reduction in grain yield was …

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Oxidative Stress And Antioxidant Defense Mechanism In Mung Bean Seedlings After Lead And Cadmium Treatments, Meher Hassan, Simeen Mansoor Jan 2014

Oxidative Stress And Antioxidant Defense Mechanism In Mung Bean Seedlings After Lead And Cadmium Treatments, Meher Hassan, Simeen Mansoor

Turkish Journal of Agriculture and Forestry

This research was an attempt to study the effect of heavy metals lead and cadmium (0.05 mM and 0.3 mM) on growth and antioxidant enzymes of seedlings of 2 mung bean genotypes (NM 19-19 and Azri mung-2006). Results revealed that germination percentage and seedling length decreased when compared with the control for both genotypes. However, seedling length and germination percentage was better in NM 19-19 as compared to Azri mung-2006. Elevated levels of protein were observed under metal stress in both genotypes. Heavy metals induced oxidative stress in plants, causing membrane injury as observed by enhanced level of malondialdehyde (MDA) …

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Artificial Neural Networks In Online Semiautomated Pest Discriminability: An Applied Case With 2 Thrips Species, Peter Fedor, Eladia Maria Peña-Méndez, Halina Kucharczyk, Jaromir Vanhara, Josef Havel, Martina Doricova, Pavol Prokop Jan 2014

Artificial Neural Networks In Online Semiautomated Pest Discriminability: An Applied Case With 2 Thrips Species, Peter Fedor, Eladia Maria Peña-Méndez, Halina Kucharczyk, Jaromir Vanhara, Josef Havel, Martina Doricova, Pavol Prokop

Turkish Journal of Agriculture and Forestry

Being faced with practical problems in pest identification, we present a methodical paper based on artificial neural networks to discriminate morphologically very similar species, Thrips sambuci Heeger, 1854 and Thrips fuscipennis Haliday, 1836 (Thysanoptera: Thripinae), as an applied case for more general use. The artificially intelligent system may be successfully applied as a credible, online, semiautomated identification tool that extracts hidden information from noisy data, even when the standard characters have much overlap and the common morphological keys hint at the practical problem of high morphological plasticity. Statistical analysis of 17 characters, measured or determined for each Thrips fuscipennis and …

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Resistance Of Winter Wheat To Heterodera Filipjevi In Turkey, Abdelfattah A. Dababat, Gül Ergi̇nbaş Orakci, Hali̇l Toktay, Mustafa İmren, Beyhan Akin, Hans-Joachim Braun, Susanne Dreisigacker, İbrahi̇m Hali̇l Elekci̇oğlu, Alexei Ivanovich Morgunov Jan 2014

Resistance Of Winter Wheat To Heterodera Filipjevi In Turkey, Abdelfattah A. Dababat, Gül Ergi̇nbaş Orakci, Hali̇l Toktay, Mustafa İmren, Beyhan Akin, Hans-Joachim Braun, Susanne Dreisigacker, İbrahi̇m Hali̇l Elekci̇oğlu, Alexei Ivanovich Morgunov

Turkish Journal of Agriculture and Forestry

Cereal cyst nematodes (CCNs) are plant parasites that significantly limit global cereal production. The most frequently reported pathogenic species are Heterodera avenae, H. filipjevi, and H. latipons. One of the most cost-effective, environmentally friendly, and easily adopted control measures is the use of genetic host resistance, which maintains nematode populations below the economic damage threshold level. Many effective sources of resistance to CCNs have been identified in cereals; however, their effectiveness and usefulness is dependent on the interaction of the specific putative resistant accession and the CCN pathotype found in a specific region. In this study, 719 wheat lines from …

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Isolation And Identification Of Entomopathogenic Nematodes (Nematoda: Rhabditida) From The Eastern Black Sea Region And Their Biocontrol Potential Against Melolontha Melolontha (Coleoptera: Scarabaeidae) Larvae, Zeynep Erbaş, Ci̇han Gökçe, Selçuk Hazir, Zi̇hni̇ Demi̇rbağ, İsmai̇l Demi̇r Jan 2014

Isolation And Identification Of Entomopathogenic Nematodes (Nematoda: Rhabditida) From The Eastern Black Sea Region And Their Biocontrol Potential Against Melolontha Melolontha (Coleoptera: Scarabaeidae) Larvae, Zeynep Erbaş, Ci̇han Gökçe, Selçuk Hazir, Zi̇hni̇ Demi̇rbağ, İsmai̇l Demi̇r

Turkish Journal of Agriculture and Forestry

A survey was conducted for entomopathogenic nematodes in various agricultural fields in the Eastern Black Sea region of Turkey. A total of 77 soil samples were collected from 15 distinct geographic areas during 2010-2011. Seven entomopathogenic nematode isolates (ZET02, ZET04, ZET09, ZET28, ZET31, ZET35, and ZET76) were detected from the soil samples (9.1% positive) using the Galleria baiting technique. Morphological and molecular characterizations of the isolates were performed for species identification. Five isolates were identified as Heterorhabditis bacteriophora (ZET02, ZET04, ZET09, ZET28, and ZET35) and 2 isolates were identified as Steinernema feltiae (ZET31 and ZET76). The efficacy of all isolates …

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Do Organic Silicon And Imidacloprid Synergistically Induce Toxicity To The New Invasive Mealybug Phenacoccus Solenopsis Tinsley On Portulaca Grandiflora Plants?, Jun Huang, Juan Zhang, Daoze Wang, Lili Zhang, Yijuan Xu, Mingjiang Li Jan 2014

Do Organic Silicon And Imidacloprid Synergistically Induce Toxicity To The New Invasive Mealybug Phenacoccus Solenopsis Tinsley On Portulaca Grandiflora Plants?, Jun Huang, Juan Zhang, Daoze Wang, Lili Zhang, Yijuan Xu, Mingjiang Li

Turkish Journal of Agriculture and Forestry

In this study, the effects of organic silicon (Si) on the toxicity of imidacloprid to a new invasive mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae), infesting Portulaca grandiflora (Caryophyllales: Portulacaceae) plants were evaluated using spotting and dipping methods under laboratory and field conditions to improve management strategies for solenopsis mealybug. Results showed significant synergistic effects of 0.06% organic Si with imidacloprid solution against third-instar P. solenopsis nymphs and adult females. However, the percentage mortalities increased remarkably after P. solenopsis was exposed to 100, 50, and 25 mg a.i./L of imidacloprid combined with organic Si. For the third-instar nymphs, these values increased to …

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Field Performance Of Trichoderma Species Against Wilt Disease Complex Of Chickpea Caused By Fusarium Oxysporum F. Sp. Ciceri And Rhizoctonia Solani, Mujeebur Rahman Khan, Shabbir Ashraf, Farahnaz Rasool, Khalid Mahmood Salati, Fayaz Ahmad Mohiddin, Ziaul Haque Jan 2014

Field Performance Of Trichoderma Species Against Wilt Disease Complex Of Chickpea Caused By Fusarium Oxysporum F. Sp. Ciceri And Rhizoctonia Solani, Mujeebur Rahman Khan, Shabbir Ashraf, Farahnaz Rasool, Khalid Mahmood Salati, Fayaz Ahmad Mohiddin, Ziaul Haque

Turkish Journal of Agriculture and Forestry

The effects of Trichoderma harzianum, T. hamatum, T. viride, T. polysporum, and T. koningii on the wilt disease complex of chickpea caused by Fusarium oxysporum f. sp. ciceri and Rhizoctonia solani were investigated under field conditions during 2 consecutive years. Chickpea cultivar Avrodhi, grown in plots inoculated with F. oxysporum f. sp. ciceri and R. solani, showed chlorosis of leaves and wilting of foliage and exhibited a 22%-25% decrease in yield. Soil application of biocontrol agents (BCAs) checked the severity of wilt by 25%-56% and 39%-67% and increased the yield of chickpea by 12%-28% and 8%-24% in the 2 years, …

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A Highly Effective Nucleopolyhedrovirus Against Malacosoma Spp. (Lepidoptera: Lasiocampidae) From Turkey: Isolation, Characterization, Phylogeny, And Virulence, İsmai̇l Demi̇r, Remzi̇ye Nalçacioğlu, Li̇da Mohammad Gholi̇zad, Zi̇hni̇ Demi̇rbağ Jan 2014

A Highly Effective Nucleopolyhedrovirus Against Malacosoma Spp. (Lepidoptera: Lasiocampidae) From Turkey: Isolation, Characterization, Phylogeny, And Virulence, İsmai̇l Demi̇r, Remzi̇ye Nalçacioğlu, Li̇da Mohammad Gholi̇zad, Zi̇hni̇ Demi̇rbağ

Turkish Journal of Agriculture and Forestry

A nucleopolyhedrovirus (NPV) was isolated from diseased larvae of the eastern tent caterpillar, Malacosoma americanum (Fabricius), collected from the northeastern part of Turkey. Light and electron microscopic observations showed that this virus is a multiple nucleopolyhedrovirus (MNPV). The dimensions of the polyhedral inclusion bodies varied from 1.0 to 2.1 µm, and the sizes of the virions were also measured to be approximately 194.5 nm. Restriction analysis of the new isolate and ManeNPV-T2 (previously isolated from M. neustria larvae) showed that the new virus is closely related to ManeNPV-T2. Furthermore, sequence and phylogenetic analysis of polh and lef-8 also revealed a …

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Genotypic Variability For Tuber Yield, Biomass, And Drought Tolerance In Jerusalem Artichoke Germplasm, Ruttanachira Ruttanaprasert, Poramate Banterng, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl Corley Holbrook, Aran Patanothai Jan 2014

Genotypic Variability For Tuber Yield, Biomass, And Drought Tolerance In Jerusalem Artichoke Germplasm, Ruttanachira Ruttanaprasert, Poramate Banterng, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl Corley Holbrook, Aran Patanothai

Turkish Journal of Agriculture and Forestry

Jerusalem artichoke could be an alternative feedstock for bioenergy during times when there are shortages of other raw materials for the ethanol industry. However, insufficient water under rainfed conditions is a major cause of Jerusalem artichoke losses. Genetic variation for drought tolerance is an essential prerequisite for the development of Jerusalem artichoke cultivars with improved drought tolerance. The objectives of this study were to determine the effects of drought stress on tuber dry weight and biomass and to investigate the genotypic variability in Jerusalem artichoke germplasm. The line-source sprinkler technique was used to compare moisture responses of a range of …

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A Response Surface Methodology Study On The Effects Of Some Phenolics And Storage Period Length On Vegetable Oil Quality: Change In Oxidation Stability Parameters, Safa Karaman, Ömer Sai̇d Toker, İsmet Öztürk, Hasan Yalçin, Ahmed Kayacier, Mahmut Doğan, Osman Sağdiç Jan 2014

A Response Surface Methodology Study On The Effects Of Some Phenolics And Storage Period Length On Vegetable Oil Quality: Change In Oxidation Stability Parameters, Safa Karaman, Ömer Sai̇d Toker, İsmet Öztürk, Hasan Yalçin, Ahmed Kayacier, Mahmut Doğan, Osman Sağdiç

Turkish Journal of Agriculture and Forestry

In the present study, response surface methodology was conducted for the determination of effects of some phenolics (gallic acid, ellagic acid, and quercetin) on some stability parameters of mixed oil prepared with sunflower and hazelnut oils (50:50, v/v). In this respect, peroxide value (PV), free fatty acids (FFAs), p-anisidine value, induction period, and refractive index of mixed oil were investigated. Predictive regression equations were constructed for the estimation of each studied parameter (R^2 > 0.861). The storage period caused a significant increase in the peroxide value, FFAs, p-anisidine, and refractive index values of the mixed oil, while it decreased the induction …

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Use Of Diploid And Tetraploid Hulled Wheat Genotypes For Animal Feeding, Mahmut Kaplan, Taner Akar, Adem Kamalak, Sancar Bulut Jan 2014

Use Of Diploid And Tetraploid Hulled Wheat Genotypes For Animal Feeding, Mahmut Kaplan, Taner Akar, Adem Kamalak, Sancar Bulut

Turkish Journal of Agriculture and Forestry

Einkorn and emmer wheat are still cultivated in the mountainous areas of Turkey. They are resistant to biotic and abiotic stress conditions and are routinely used as food stuffs due to reasonable dietary fiber rate and vitamin and micronutrient content. Therefore, the present study was conducted to determine the feed potential of einkorn and emmer wheat populations. A total of 17 hulled wheat populations collected from different provinces of Turkey were studied during the years 2012 and 2013. Experiments were carried out in randomized complete block design with 3 replications to investigate grain yield, harvest index, chemical composition, and gas …

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First Report Of Adoxophyes Orana In Northwestern Turkey: Population Fluctuation And Damage On Different Host Plants, Bi̇lgi̇ Pehlevan, Orkun Bariş Kovanci Jan 2014

First Report Of Adoxophyes Orana In Northwestern Turkey: Population Fluctuation And Damage On Different Host Plants, Bi̇lgi̇ Pehlevan, Orkun Bariş Kovanci

Turkish Journal of Agriculture and Forestry

This study reports the presence of the summer fruit tortrix moth, Adoxophyes orana, in pome and stone fruit orchards for the first time in northwestern Turkey. Based on growers’ complaints about cosmetic damage to peach and pear fruits, pheromone traps were set up in mid-April of 2009 and 2010 to monitor the occurrence of the summer fruit tortrix moth. We conducted studies in conventional apple, pear, peach, and sweet cherry orchards in Bursa, northwestern Turkey. Moths caught in pheromone traps showed a trimodal flight pattern in all orchards. However, both moth emergence time and total flight period varied among host …

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Occurrence Of Botryosphaeriaceae Species Associated With Grapevine Dieback In Algeria, Faiza Ammad, Messaoud Benchabane, Mohamed Toumi, Nesrine Belkacem, Amel Guesmi, Cherif Ameur, Pascal Lecomte, Othmane Merah Jan 2014

Occurrence Of Botryosphaeriaceae Species Associated With Grapevine Dieback In Algeria, Faiza Ammad, Messaoud Benchabane, Mohamed Toumi, Nesrine Belkacem, Amel Guesmi, Cherif Ameur, Pascal Lecomte, Othmane Merah

Turkish Journal of Agriculture and Forestry

Grapevine dieback is an increasing problem in grape vineyards in Algeria. We conducted field surveys each spring between 2006 and 2012 to determine the fungal pathogens associated with grapevine decline in various grape-growing regions. We isolated and identified 3 species of Botryosphaeriaceae (Botryosphaeria dothidea, Diplodia seriata, and Neofusicoccum parvum) from infected wood using a combination of morphological and cultural characters, as well as phylogenetic analyses of ribosomal DNA internal transcribed spacer (ITS) regions and fruiting body. We identified 20 isolates of Diplodia seriata, 13 isolates of Botryosphaeria dothidea, and 7 isolates of Neofusicoccum parvum. Inoculation of grapevine plantlets with the …

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Comparison Of Life Experiences Of Men And Women In The Sciences, Tori Nicole Quist Jan 2014

Comparison Of Life Experiences Of Men And Women In The Sciences, Tori Nicole Quist

Honors Program Theses

A lack of sense of belonging and stereotype threat have been shown to contribute to women leaving the sciences (Seymour, 1997; Beasley & Fischer, 2012; Deemer et al., 2013). Contributing to this is the fact that most women find affirmation externally (through friends, family and professors) for their life decisions (Seymour, 1997; Zeldin, 2000). A set of comparative studies in 2000 and 2008 were done examining factors affecting women’s and men’s choices of majors and careers (Zeldin, 2000 and Zeldin, 2008). These studies concluded that men relied on achievements in science as the source of their career decisions to enter …

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A Study Of Induction Pyrolysis Of Lignicellulosic Biomass For The Production Of Bio-Oil, Charles Edward Henkel Jan 2014

A Study Of Induction Pyrolysis Of Lignicellulosic Biomass For The Production Of Bio-Oil, Charles Edward Henkel

LSU Master's Theses

The increasing demand for energy coupled with a growing concern that the combustion of fossil fuels has on the environment, through the production of greenhouse gases, has created a demand for renewable energy sources. The demand for renewable energy, particularly liquid transportation fuels, can be met in part by the use of biomass based liquid fuels. There are several methods that can be used to produce biomass based fuels, but only thermochemical conversion (pyrolysis) can readily convert lignocellulosic biomass into a fuel-like liquid, bio-oil. The pyrolytic conditions for obtaining maximum liquid yields vary, but many of the criteria can be …

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Silver Nanoparticle Oligonucleotide Conjugate For Targeted Gene Silencing, Alyson Nanette Moll Jan 2014

Silver Nanoparticle Oligonucleotide Conjugate For Targeted Gene Silencing, Alyson Nanette Moll

LSU Master's Theses

This project explored a gene-regulated chemotherapy using a silver nanoparticle (SNP) conjugated with deoxyribozyme (DNAzyme) oligonucleotides which target a mutated gene in select cancer cells, sensitize them to doxorubicin treatment. Light exposure to the SNP-DNAzyme conjugates disengages the oligonucleotides and permits specific cleavage of the Kirsten Rat Sarcomal Oncogene Homolog (K-RAS) mRNA. These conjugates could provide spatiotemporal specificity in killing only those photoexposed cells with the mutant gene. Synthesis, functionalization and characterization of citrate and hydroxypropyl cellulose SNP conjugates confirmed attachment and photolytic release of the thiol-modified 10-23 DNAzyme. Gel electrophoresis was used to demonstrate DNAzyme photoactivation, showing greater K-RAS …

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Iron Removal Using Electro- Coagulation Followed By Floating Bead Bed Filtration, Asmita Anil Phadke Jan 2014

Iron Removal Using Electro- Coagulation Followed By Floating Bead Bed Filtration, Asmita Anil Phadke

LSU Master's Theses

High iron concentrations in the water used for aquaculture results in stock losses. It is necessary to drop down the iron concentrations to levels which can be handled by the fish. Electrocoagulation followed by floating bead bed filtration was used to remove iron from water. Electrocoagulation was carried out using aluminum electrodes. The flocs formed in the coagulation tank were then filtered out using 2-3 mm polyethylene floating beads having specific gravity of 0.92 gm/cm3. Proper retention time of ≥ 10 min, pH of 6±0.2, Al3+ coagulant dosage of about 9 mg-Al3+/ L and flow rate ≤ 0.4 gpm resulted …

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Development Of Visible Light-Promoted Photocatalytic O-Glycosylation, C-H Activation Of Alkanes And Deoxygenation Of N-(Mesyloxy) Amides, Xiaoping Wang Jan 2014

Development Of Visible Light-Promoted Photocatalytic O-Glycosylation, C-H Activation Of Alkanes And Deoxygenation Of N-(Mesyloxy) Amides, Xiaoping Wang

LSU Master's Theses

This thesis is divided into four chapters reporting various aspects of the background of studies and the preliminary results I obtained in three projects. Chapter 1 gives a brief introduction to the concepts of photoredox catalysis, O-glycosylation, C-H functionalization and amidyl radicals. Chapter 2 describes the development of a visible light-promoted O-glycosylation catalyzed by Ru(bpy)3(PF6)2 or diphenyldiselenide under mild conditions. The glycosylation of primary and secondary alcohols with selenoglycosides was demonstrated with good yields, and disaccharides were constructed by coupling of the selenoglycosides in acetonitrile or dichloromethane with a glucosyl acceptor in moderate yields. The reactions catalyzed by Ru(bpy)3(PF6)2 were …

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Grassland Bird Nest Survival In Perennial Agroenergy Crops, Libby Torresani, Stephanie Paape, Mark C. Myers Jan 2014

Grassland Bird Nest Survival In Perennial Agroenergy Crops, Libby Torresani, Stephanie Paape, Mark C. Myers

Undergraduate Student Work

Previous research had been done in 2011 and 2012 regarding bird nest survival rates in the Cedar River Natural Resource Area in Washburn, IA. Further analysis of bird nest survival rates was done in this study to research how nest age, calendar date, soil type, and vegetation type influence the success or failure of these nests. New nests were identified in the prairie plots of the Cedar River Natural Resource Area and added to the previous sample size from the original study. A sample size of 97 bird nests total and 67 Dickcissel nests –SPAM (Spiza Americana) were …

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Bioavailability Of Alpha-Tocopherol Entrapped In Poly (Lactide-Co-Glycolide) (Plga) And Plga-Chitosan Nanoparticles, Lacey Caroline Simon Jan 2014

Bioavailability Of Alpha-Tocopherol Entrapped In Poly (Lactide-Co-Glycolide) (Plga) And Plga-Chitosan Nanoparticles, Lacey Caroline Simon

LSU Master's Theses

Alpha-tocopherol (áT) is a hydrophobic, antioxidant molecule shown to prevent or retard the effects of free radicals associated with diseases. It is hypothesized that the bioavailability of áT can be improved when entrapped in PLGA (Poly lactide-co-glycolide) and PLGA-Chi (PLGA-Chitosan) nanoparticles and that the mucoadhesive properties of chitosan may enhance absorption more than PLGA alone. PLGA and PLGA-Chi NPs synthesized with PVA as surfactant were characterized by measuring entrapment efficiency, size, PDI, and zeta potential when suspended in DI water. Nanoparticle physical stability was evaluated via NP exposure to environmental pH ranging from 2.5-9. Chemical stability of entrapped áT was …

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Avian Biogeography And Conservation In Eastern Indonesia, John C. Mittermeier Jan 2014

Avian Biogeography And Conservation In Eastern Indonesia, John C. Mittermeier

LSU Master's Theses

Evaluating the conservation status of threatened species requires a sequential process of 1) taxonomic classification, 2) distributional mapping, and 3) evaluation of species according to criteria established by the IUCN Red List. Knowledge gaps in the first two phases of this process have been termed the Linnaean and Wallacean Shortfalls, respectively. The Indonesian archipelago is one of the most biologically diverse areas of the planet, as well as one of the most threatened and poorly studied, and the Linnaean and Wallacean Shortfalls pose substantial challenges for conservation in the region. Here I address each of the three stages of categorizing …

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Hamiltonian Approach To The Modeling Of Internal Geophysical Waves With Vorticity, Alan Compelli Jan 2014

Hamiltonian Approach To The Modeling Of Internal Geophysical Waves With Vorticity, Alan Compelli

Articles

We examine a simplified model of internal geophysical waves in a rotational 2-dimensional water-wave system, under the influence of Coriolis forces and with gravitationally induced waves. The system consists of a lower medium, bound underneath by an impermeable flat bed, and an upper lid. The 2 media have a free common interface. Both media have constant density and constant (non-zero) vorticity. By examining the governing equations of the system we calculate the Hamiltonian of the system in terms of its conjugate variables and perform a variable transformation to show that it has canonical Hamiltonian structure. We then linearize the system, …

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Carbon Nanotube Inkjet Printing For Flexible Electronics And Chemical Sensor Applications, Ryan P. Tortorich Jan 2014

Carbon Nanotube Inkjet Printing For Flexible Electronics And Chemical Sensor Applications, Ryan P. Tortorich

LSU Master's Theses

Carbon nanotubes (CNTs) are becoming a promising new material for use in many fields including the field of electronics. Their mechanical and electrical properties lend themselves to be used in a new generation of electronic devices, namely flexible electronics. Although many deposition methods for carbon nanotubes exist, inkjet printing offers many advantages including superior patterning ability and low-cost fabrication. Presented in this work is the use of inkjet printing in order to deposit carbon nanotubes onto a flexible transparency film. The methods for developing and printing an aqueous single-walled carbon nanotube (SWCNT) ink and an aqueous multi-walled carbon nanotube (MWCNT) …

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Temporal Variability Of Particulate Organic Carbon Fluxes In The Northern Gulf Of Mexico, Somiddho Bosu Jan 2014

Temporal Variability Of Particulate Organic Carbon Fluxes In The Northern Gulf Of Mexico, Somiddho Bosu

LSU Master's Theses

There is limited data of Particulate Organic Carbon (POC) export from the Northern Gulf of Mexico and this work presents the first estimation of the efficiency of the “biological pump” in this region. In oligotrophic oceans like the Gulf of Mexico, POC is the main source of particles and POC flux is the key mechanism for the removal of particle reactive contaminants and pollutants from upper ocean water column. Particle-reactive, the naturally occurring radionuclides are useful tracers of the sinking flux of organic matter from the surface to the deep ocean. The disequilibrium between natural radioisotope pair 238U-234Th as well …

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Optimizing Bioengineered Coastal Materials, Matthew Byrum Jan 2014

Optimizing Bioengineered Coastal Materials, Matthew Byrum

LSU Master's Theses

Developing materials that are environmentally friendly and capable of high performance is important to maximize the efficiency and success of coastal restoration projects. Louisiana is losing large amounts of coastal land each year, while suffering 90% of the United States’ coastal wetland loss. Some areas have begun to implement physical structures to dissipate wave energy and accrete sediment. Recent technological advances have allowed the transformation of these structures into engineered ecosystems, with a focus on oyster accumulation. These ecosystems support the growth of oysters, Crassostrea virginica, which serve to improve water quality and protect shorelines through filtration and wave energy …

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Using Seed Recovery Methods To Determine Causes Of Failed Germination In Native Prairie Species, Paige Leytem Jan 2014

Using Seed Recovery Methods To Determine Causes Of Failed Germination In Native Prairie Species, Paige Leytem

Honors Program Theses

Prairie restorations are expensive and emergence rates as low as ten percent are often observed. This could be because seeds are exposed to dangers from microbial and fungal attack, as well as predation from granivores after planting. Our experiment aimed to determine the post-dispersal seed fates of four native prairie species after they had been planted in the soil and covered with an exclosure to limit vertebrate predation. It was performed in a prairie restoration on the University of Northern Iowa Campus in Cedar Falls, Iowa. I coated five sets of 100 seeds of each species (Elymus canadensis, Oligoneuron rigidum, …

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Growth And Mortality Of Ozark Bass (Ambloplites Constellatus) In Streams Of The Ozark Highlands, Ashley R. Rodman, Kristofor R. Brye Jan 2014

Growth And Mortality Of Ozark Bass (Ambloplites Constellatus) In Streams Of The Ozark Highlands, Ashley R. Rodman, Kristofor R. Brye

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

The Ozark bass (Ambloplites constellatus) is endemic to the Upper White River Basin, and a limited amount of information exists on the Ozark bass population, including growth and mortality characteristics. The purpose of this study was to determine growth and mortality of Ozark bass in the Upper White River Basin, compare growth of Ozark bass to other Ambloplites species, and compare growth and mortality of Ozark bass between sample sites. Sampling occurred in Crooked Creek and in the Lower Wilderness Area (LWA) of the Buffalo River, with multiple collections from each body of water. Sampling occurred during summer 2013 via …

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