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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 251 to 254 of 254 (0.025 seconds)Spelling suggestions: "subject:"8pores"" "subject:"dpores""
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Applications and Effects of Ohmic Heating: Sterilization, Influence on Bacterial Spores, Enzymes, Bioactive Components and Quality Factors in FoodSomavat, Romel 10 January 2011 (has links)
No description available.
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| 252 |
Incidence of Clostridium botulinum Spores in Honey and Infant Food Samples Collected from Vietnam and Germany / Vorkommen von Clostridium-botulinum-Sporen in Honig- und Säuglingsnahrungsproben aus Vietnam und DeutschlandVu, Thi Lam An 02 November 2006 (has links)
No description available.
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Untersuchungen zum Auftreten von Myxosporidien bei Nutz- und Wildfischarten aus Binnengewässern der DDRSedlaczek, Jürgen 16 February 2016 (has links)
Die Arbeit verfolgt das Ziel, eine Übersicht über die bei verschiedenen Süßwasserfischarten festgestellten Myxosporidien zu geben. Aus Gewässern der DDR-Bezirke Potsdam, Berlin, Frankfurt (Oder), Cottbus und Dresden wurden 1.850 Fische (1.015 Karpfen, 258 Regenbogenforellen, 143 Silberkarpfen, 104 Plötzen sowie weitere 22 Fischarten in geringer Zahl untersucht. Es wurden 40 Myxosporidienarten folgender taxonomischer Gruppen nachgewiesen: Myxidiidae (7), Sphaerosporidae (6), Chloromyxidae (4) und Myxobolidae (23). In der Arbeit sind Maße, Fotos und Zeichnungen der Parasiten enthalten. Es wurden Angaben über die Taxonomie, Organspezifität, Saisondynamik, Epizootiologie und Auswirkungen auf die Fischgesundheit gemacht. Es erfolgte ein Vergleich mit früheren Arbeiten in der DDR auf diesem Gebiet. Der Artenbestand an Myxosporidien konnte um 39 Arten erweitert werden. Anhand faunistischer Arbeiten aus benachbarten Ländern wurden die Bedeutung und Perspektiven zum Auftreten von Myxosporidiosen in der DDR herausgestellt. / This work aims to give an overview about the detected Myxosporeans in different species of freshwater fishes. From inland waters of the GDR districts Potsdam, Berlin, Frankfurt (Oder), Cottbus and Dresden 1.850 fishes (1.015 carps, 258 rainbow trouts, 143 silver carps, 104 roach and more 22 Fish species in small numbers were studied. 40 Myxosporean species of following taxonomic groups were detected: Myxidiidae (7), Sphaerosporidae (6), Chloromyxidae (4) und Myxobolidae (23). In this work are presented dimensions, photos and drawings of the parasites. Details are given on taxonomy, organ specificity, season dynamics, epizootiology and the impact on fish health A comparison with previous work in the GDR on this subject was carried out. The species inventory on Myxosporidia could be extended to 39 species. Based on faunal work from neighboring countries the importance and prospects for occurrence of Myxosporidiosis in the GDR were highlighted.
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PLANT-ENDOPHYTE INTERPLAY PROTECTS TOMATO AGAINST A VIRULENT VERTICILLIUM DAHLIAEShittu, Hakeem Olalekan 05 October 2010 (has links)
When tomato Craigella is infected with Verticillium dahliae Dvd-E6 (Dvd-E6), a tolerant state is induced with substantial pathogen load, but few symptoms. Unexpectedly, these plants are more robust and taller with Dvd-E6 behaving as an endophyte. Some endophytes can protect plants from virulent pathogens. This research was undertaken to improve understanding of the cellular and molecular nature of Verticillium tolerance in tomato, especially whether infection by Dvd-E6 can protect Craigella from virulent V. dahliae, race 1 (Vd1). To permit mixed infection experiments a restriction fragment length polymorphism (RFLP)-based assay was developed and used for differentiating Dvd-E6 from Vd1, when present in mixed infections. The results suggested that protection involves molecular interplay between Dvd-E6 and Vd1 in susceptible Craigella (CS) tomatoes, resulting in restricted Vd1 colonization. Further studies showed a dramatic reduction of Vd1 spores and mycelia. To examine genetic changes that account for these biological changes, a customized DNA chip (TVR) was used to analyze defense gene mRNA levels. The defense gene response was categorized into four groups. Group 1 was characterized by strong induction of defense genes followed by suppression. However, Vd1-induced gene suppression was blocked by Dvd-E6 in mixed infections.
These genes included some transcription factors and PR proteins such as class IV chitinases and beta glucanases which are known to target fungal spores and mycelia. Experiments also were repeated with a Craigella resistant (CR) isoline containing a fully active Ve locus (Ve1+ and Ve2+). The biological results showed that the presence of the Ve1+ allele resulted in restricted Vd1 colonization and, in a mixed infection with Dvd-E6, Vd1 was completely eliminated from the plant stem. Surprisingly, there was no significant increase in defense gene mRNAs. Rather, elevated basal levels of defense gene products appeared sufficient to combat pathogen attack. To investigate functional effects of the genetic changes observed, an inducible RNAi knockdown vector for a defense gene (TUS15G8) with unknown function (pMW4-TUS15G8) as well as the Ve2 resistance gene (pMW-Ve2) was prepared as a initial step for future transformation analyses. Taken together the results reveal intriguing but complex biological and molecular changes in mixed infections, which remain a basis for future experiments and potential agricultural benefits. / Canadian Commonwealth Scholarship and Fellowship Plan
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