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Dissertations / Theses on the topic 'Asimina'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Cox, Anne Cheney. "Comparative reproductive biology of two Florida pawpaws asimina reticulata chapman and asimina tetramera small." FIU Digital Commons, 1998. http://digitalcommons.fiu.edu/etd/2656.

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I investigated the phenology and breeding systems of two Florida endemic pawpaws, Asimina reticulata, widespread in peninsular Florida, and A. tetramera, a federally endangered species limited to two counties on the Atlantic Coastal Ridge. The purpose of this study was to determine if differences contribute to the rarity of Asimina tetramera compared with A. reticulata. The study was conducted in sand pine scrub sites with the largest populations of A. tetramera in the two counties. Flowering seasons differ for the two species. Both species are hermaphroditic and strongly protogynous. Pollination experiments show that neither species is autogamous and the primary breeding mechanism is outcrossing, although low levels of geitonogamous pollination occur in mature scrub habitats. High levels of inbreeding depression were noted in both species at both sites but inbreeding depression was relaxed the first year post-fire. Fruit set in mature habitats may be pollinator limited. I studied insects associated with the flowers in sand pine scrub habitat in southeastern Florida from 1994-1996. The most commonly represented orders were Coleoptera (25 spp.), Lepidoptera (3 spp.) and Hymenoptera (3 spp.). All Coleoptera were flower visitors; one species, Euphoria sepulchralis (Fabricius) (Scarabeaidae), visited flowers of the two Asimina species at both sites. Euryiides marcellus (Cramer) (Lepidoptera: Papilionidae) eggs and larvae were observed on both species of Asimina during each year of the study. Resource management techniques were applied to a mature sand pine scrub community in Jona than Dickinson State Park in southeastern Florida for the management of Asimina tetramera. Manipulations conducted in 1996 included combinations of fire and mechanical treatments. I measured effects of these treatments on flowering and fruit-set on A. tetramera and found the fire treatments, BURN and CUT&BURN, significantly increased flowering. Mechanical treatments cutting and mulching had no significant effect.
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2

Baumer, Marilyn Cabrini. "Tree Seedling Establishment Under the Native Shrub, Asimina Triloba." Wright State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=wright1183587955.

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3

Fang, Caodi. "CHARACTERIZATION OF POLYPHENOL OXIDASE AND ANTIOXIDANTS FROM PAWPAW (ASIMINA TRIBOLA) FRUIT." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/477.

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The latest generation of fighter aircraft utilizes a 270Vdc power system [1]. Such high voltage DC power systems are difficult to protect with conventional circuit breakers because the current does not automatically go to zero twice per cycle during a fault like it does in an AC power system and thus arcing of the contacts is a problem. Solid state power controllers (SSPCs) are the solid state equivalent of a circuit breaker that do not arc and which can respond more rapidly to a fault than a mechanical breaker [2]. Present SSPCs are limited to lower voltages and currents by the available power semiconductors [8,9]. This dissertation presents design and experimental results for a SSPC that utilizes SiC power JFETs for the SSPC power switch to extend SSPC capability to higher voltages and currents in a space that is smaller than what is practically achievable with a Si power switch. The research started with the thermal analysis of the SSPCs power switch, which will guide the development of a SiC JFET multi-chip power module to be fabricated by Solid State Devices Inc. (SSDI) using JFETs from SiCED and/or Semisouth LLC. Multiple multi-chip power modules will be paralleled to make the SSPC switch. Fabricated devices were evaluated thermally both statically and dynamically and electrically both statically and dynamically. In addition to the SiC module research a detailed design of the high voltage SSPC control circuit capable of operating at 200andamp;ordm;C was completed including detailed analysis, modeling and simulations, detailed schematic diagrams and detailed drawings. Finally breadboards of selected control circuits were fabricated and tested to verify simulation results. Methods for testing SiC JFET devices under transient thermal conditions unique to the SSPC application was also developed.
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4

Crummer, Kathryn Grace. "Physiological leaf traits of scrub pawpaw, Asimina obovata (Willd.) Nash (Annonaceae)." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001101.

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5

Francino, Sarah E. "Variation in Pawpaw (Asimina triloba L. Dunal) Productivity and Fruit Quality Among Cultivars and Orchards in Ohio." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562168100307853.

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6

Crabtree, Sheri Beth. "SEXUAL AND ASEXUAL REPRODUCTIVE CHARACTERISTICS OF THE NORTH AMERICAN PAWPAW [ASIMINA TRILOBA (L.) DUNAL]." Lexington, Ky. : [University of Kentucky Libraries], 2004. http://lib.uky.edu/ETD/ukypssc2004t00208/etd.pdf.

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Thesis (m.s.)--University of Kentucky, 2004.
Title from document title page (viewed Jan. 7, 2005). Document formatted into pages; contains viii, 80p. : ill. Includes abstract and vita. Includes bibliographical references (p. 74-79).
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7

Lewis, Mark Andrew. "The insecticidal mode of action of asimicin and a standardized extract, F020, isolated from Asimina triloba (Annonaceae)." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6500.

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The natural plant toxin asimicin and the standardized extract F020 from Asimina triloba (Annonaceae) were examined for their insecticidal properties using six insect species, encompassing four orders. Growth of Ostrinia nubilalis and Manduca sexta larvae was inhibited at 100 and 500 $\mu$g F020$\cdot$g diet$\sp{-1}$, respectively and mortality was significantly higher than controls at levels as low as 500 and 1 $\mu$g F020$\cdot$g diet$\sp{-1}$, respectively. Antifeedant properties were observed. Toxicity and growth reduction from exposure to F020 were apparent for Oncopeltus fasciatus (Hemiptera) and Tenebrio molitor (Coleoptera). Tenebrio molitor was significantly affected at doses as high as 250 $\mu$g F020$\cdot\mu$l$\sp{-1}$ and at 20 $\mu$g asimicin$\cdot\mu$l$\sp{-1}$. Examination of the effect of F020 on the respiratory rate of third instar O. nubilalis larvae demonstrated that F020 is an effective respiratory inhibitor. Both F020 and asimicin were very effective at inhibiting complex I, the NADH-ubiquinone site of the electron transport chain. The EC$\sb{50}$ values for inhibition of state 3 respiration by asimicin and F020 were 0.546 nmoles$\cdot$mg protein$\sp{-1}$ and 1.656 $\mu$g$\cdot$mg protein$\sp{-1}$, respectively. (Abstract shortened by UMI.)
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8

Galli, Federica. "RIPENING AND POSTHARVEST MANAGEMENT OF PAWPAW FRUIT." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/507.

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Pawpaw (Asimina triloba (L.) Dunal) has significant potential as a new fruit crop. During ripening, loss of firmness is extremely rapid, and this trait may be the biggest obstacle to the development of a broader market as handling without injury is difficult. Cold storage of pawpaw seems limited to 4 weeks at 4 C. A study of several cultivars with commercial appeal showed that ripening traits such as ethylene production, respiration and loss of firmness were similar in all genotypes, and that no cultivar showed superior responses to cold storage. Cold storage for longer than 4 weeks caused the development of cold injury symptoms such as black discoloration, rapid loss of firmness, impaired respiration, tissue acidification, decrease in antioxidant content, decrease in volatile ester production and development of off-flavor volatile compounds. Overall cold storage injury symptoms observed in pawpaw may be due to oxidative damage linked to the failure of the two major antioxidant systems that could protect against such damage: phenolics and the ascorbateglutamate system. With the aim of enhancing pawpaw low temperature tolerance and prolonging cold storage length, different techniques such as hot air exposure and hot water dips of fruit prior to beginning cold storage, and intermittent warming periods during cold storage, were evaluated. Despite positive results with these techniques for other commodities, all the strategies failed to appreciably alter fruit ripening, loss of firmness or maintain fruit quality during and/or after cold storage.
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9

Greenawalt, Laine M. "Comparative Analysis of Pawpaw Production Data from 2005-2012." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1466428938.

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10

Zhang, Lin. "The Effects of High Pressure Processing, Browning Additives, and Storage Period on the Inactivation of Polyphenol Oxidase in Nine Varieties of Pawpaw (Asimina Triloba L.) Pulp." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1462352198.

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11

Braga, Héberly Fernandes. "Desenvolvimento de néctar à base de mamão (Carica papaya L.) adicionado de inulina e oligofrutose /." São José do Rio Preto, 2013. http://hdl.handle.net/11449/110511.

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Orientador: Ana Carolina Conti e Silva
Banca: Karina de Lemos Sampaio
Banca: Natália Soares Janzantti
Resumo: A demanda por alimentos e ingredientes funcionais tem aumentado, em particular pelos prebióticos. A incorporação de inulina e oligofrutose às bebidas de frutas, como o néctar, torna-se uma alternativa para agregar valor nutritivo aos produtos. Dentre as frutas, o mamão representa uma excelente opção devido ao fácil cultivo, alta produtividade, baixo custo, alto valor nutritivo e particularmente à escassez do néctar dessa fruta no mercado brasileiro. O trabalho objetivou desenvolver néctares de mamão com diferentes concentrações de açúcar, oligofrutose e inulina. Foram elaborados néctares, sem frutanos, com 6, 8, 10 e 12% de açúcar e determinado o ideal de doçura em açúcar. A partir da formulação considerada ideal em doçura, foi aplicada a metodologia de modelagem de misturas para avaliar os efeitos da interação entre açúcar, oligofrutose e inulina na aceitação sensorial e características químicas dos néctares de mamão (variáveis dependentes). As formulações foram avaliadas sensorialmente quanto à aceitação (aparência, aroma, viscosidade, sabor, doçura e avaliação global) e intenção de compra, empregando-se escala hedônica de nove pontos e escala categórica de cinco pontos, respectivamente. Os resultados da aceitação sensorial também foram avaliados por meio da análise de Cluster e Análise de Componentes Principais para construção dos mapas de preferência internos. As formulações foram caracterizadas quimicamente quanto ao teor sólidos solúveis e totais, acidez total titulável, açúcares totais, cinzas e pH. A formulação mais aceita para avaliação global foi monitorada durante quinze dias quanto ao pH, acidez total titulável, bactérias mesófilas, psicrotróficas, bolores e leveduras, coliformes totais e termotolerantes. A formulação com 12% de açúcar foi considerada como ideal em doçura por 36% dos julgadores. A interação entre os ingredientes açúcar, oligofrutose e ...
Abstract: The demand for food and functional ingredients has increased, in particular by the prebiotics. The incorporation of inulin and oligofructose in fruit drinks, as nectars, is an alternative to increase nutritional value to products. Among fruits, the papaya is an excellent choice because of its easy cultivation, high productivity, low cost, high nutritional value and, particularly, the shortage of this fruit nectar in the Brazilian market. The study aimed to develop papaya nectars with different concentrations of sugar, oligofructose and inulin. Nectars were prepared with 6, 8, 10 and 12% sugar (without fructan) and the ideal sweetness of sugar was determined. From the formulation considered ideal sweetness, the mixtures modeling methodology was applied to assess the effects of the interaction between sugar, oligofructose and inulin on the acceptance sensory and chemical characteristics of papaya nectars (dependent variables). The sensory acceptance regarding to appearance, aroma, viscosity, flavor, sweetness and overall evaluation and purchase intent was evaluated, using a nine point hedonic scale and categorical scale of five points, respectively. The results of sensory acceptance were also assessed by cluster analysis and principal component analysis to construct internal preference maps. The formulations were characterized regarding to soluble solids and total, titratable acidity, total sugars, ash and pH. The best formulation for overall assessment was monitored for two weeks for pH, titratable acidity, mesophilic, psychrotrophic, yeasts and molds, total and fecal coliforms. The formulation with 12% sugar was considered ideal for sweetness by 36% of the panelists. The interaction between the ingredients sugar, oligofructose and inulin influenced the acceptance for the taste and the sweetness of the nectar, and the formulation with 6% sugar and 6% inulin was the most acceptable for these attributes. The preference for attributes of this ...
Mestre
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12

Tsiokou, Asimina [Verfasser], Holger [Akademischer Betreuer] Stepam, Christine [Akademischer Betreuer] Wolff, Matthias [Gutachter] Faßbauer, and Franz [Gutachter] Kainer. "Ergebnisqualität der Betreuung prägravid manifester Diabetikerinnen vor und nach dem strukturellen Wandel im Gesundheitssystem in einem Zentrum für diabetische Schwangere-Stoffwechselparameter, perinatales Ergebnis und ophthalmologische Befunde / Asimina Tsiokou ; Gutachter: Matthias Faßbauer, Franz Kainer ; Holger Stepam, Christine Wolff." Leipzig : Universitätsbibliothek Leipzig, 2014. http://d-nb.info/1238600239/34.

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13

Ponce, Cuadra Jorge Alberto. "La metodología del SETECA para la administración del cambio organizacional y el grado en que la misma facilita al personal asimilar el cambio organizacional." Theological Research Exchange Network (TREN), 2006. http://www.tren.com/search.cfm?p001-1074.

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14

Bibi, Asima [Verfasser], Hassan [Akademischer Betreuer] Dihazi, Sigrid [Akademischer Betreuer] Hoyer-Fender, and Jürgen [Akademischer Betreuer] Brockmöller. "Calreticulin in kidney function and disease: chronic low level of calreticulin impairs Ca2+ homeostasis leading to mitochondrial dysfunction and chronic renal injury / Asima Bibi. Gutachter: Sigrid Hoyer-Fender ; Jürgen Brockmöller. Betreuer: Hassan Dihazi." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1043028803/34.

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15

Siochu, Asimula [Verfasser]. "Bestimmung der Prävalenz von Antikörpern gegen Hepatitis-E-Virus in Seren von Blutspendern, Schlachthauspersonal, Schweinezüchtern und Schlachtschweinen / vorgelegt von Asimula Siochu." 2003. http://d-nb.info/967282098/34.

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16

Eschbach, Daphne-Asimenia [Verfasser]. "Immunhistologische Charakteristika seniler Plaques unter besonderer Berücksichtigung der Alpha-Synuklein-Immunhistologie : eine vergleichende neuropathologische Autopsiestudie bei M. Alzheimer, Demenz mit Lewy-Körpern und nicht-dementen alten Menschen / vorgelegt von Daphne-Asimenia Eschbach." 2010. http://d-nb.info/1008504793/34.

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