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Dissertations / Theses on the topic 'Krell'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Krell, Hartmut Krell Nicolaus. "Das Verfahren gegen den 1601 hingerichteten kursächsischen Kanzler Dr. Nicolaus Krell /." Frankfurt am Main [u.a.] : Lang, 2006. http://www.gbv.de/dms/spk/sbb/recht/toc/508403588.pdf.

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2

Krell, Markus [Verfasser]. "Auslegung und Einsatz einer dämpfend wirkenden Werkzeugaufnahme für lang auskragende Werkzeuge / Markus Krell." Aachen : Shaker, 2004. http://d-nb.info/1170545610/34.

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3

Krell, Uta [Verfasser], and Ana [Akademischer Betreuer] Zenclussen. "Immunhistologische Untersuchungen an Ovarbiopsien von Frauen mit Ovarialfunktionsstörungen / Uta Krell. Betreuer: Ana Zenclussen." Magdeburg : Universitätsbibliothek, 2012. http://d-nb.info/1053227094/34.

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4

Krell, Julian [Verfasser], Werner [Gutachter] Theisen, and Sebastian [Gutachter] Weber. "Entwicklung warmverschleißbeständiger Legierungskonzepte zur Substitution von Kobaltbasislegierungen / Julian Krell ; Gutachter: Werner Theisen, Sebastian Weber ; Fakultät für Maschinenbau." Bochum : Ruhr-Universität Bochum, 2021. http://d-nb.info/1226428991/34.

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5

Krell-Rösch, Janina [Verfasser]. "Interdependence of Physical (In-) Activity, Fitness and Cognition: A Cross-Sectional Study in Young Adults / Janina Krell-Rösch." Karlsruhe : KIT Scientific Publishing, 2014. http://www.ksp.kit.edu.

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6

Krell, Mario Michael [Verfasser], Frank [Akademischer Betreuer] Kirchner, and Christof [Akademischer Betreuer] Büskens. "Generalizing, Decoding, and Optimizing Support Vector Machine Classification / Mario Michael Krell. Gutachter: Frank Kirchner ; Christof Büskens. Betreuer: Frank Kirchner." Bremen : Staats- und Universitätsbibliothek Bremen, 2015. http://d-nb.info/1072303930/34.

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7

Krell, Kristina [Verfasser]. "Die dreidimensionale Echtzeit-Echokardiographie in der Pädiatrie : Vergleich verschiedener Auswertungsprogramme und Erstellung volumetrischer Normwert-Perzentilen für den linken Ventrikel / Kristina Krell." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/120009980X/34.

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8

Krell, Katja [Verfasser], and H. A. [Akademischer Betreuer] Wagenknecht. "Fluorogenic Labeling of Oligonucleotides by Means of Photoclick-Reaction and Strain-Promoted Sydnone Alkyne Cycloaddition / Katja Krell ; Betreuer: H.-A. Wagenknecht." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1226222056/34.

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9

Uhlig, Christiane [Verfasser], Andreas [Akademischer Betreuer] Krell, Kai [Akademischer Betreuer] Bischof, and Ulrich [Akademischer Betreuer] Bathmann. "Living inside Sea Ice : Distribution and Functional Characterisation of Antifreeze Proteins in Polar Diatoms / Christiane Uhlig. Gutachter: Kai Bischof ; Ulrich Bathmann. Betreuer: Andreas Krell." Bremen : Staats- und Universitätsbibliothek Bremen, 2011. http://d-nb.info/1071992457/34.

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10

Krell, Johannes [Verfasser], Eveline [Akademischer Betreuer] Wittmann, Ulrike [Gutachter] Weyland, and Eveline [Gutachter] Wittmann. "Die Entwicklung professioneller Handlungskompetenz durch das Lösen von Problemen in der stationären Krankenpflege : Ansatzpunkte für Praxisanleiter/innen und anderes betriebliches Bildungspersonal / Johannes Krell ; Gutachter: Ulrike Weyland, Eveline Wittmann ; Betreuer: Eveline Wittmann." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1160381356/34.

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11

Nguyen, The Cuong. "Algèbre homologique dans la catégorie des modules instables." Thesis, Paris 13, 2014. http://www.theses.fr/2014PA132007/document.

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Cette thèse présente des calculs d’algèbre homologique dans la catégorie des modules instables. Dans le premier chapitre, on rappelle des généralités sur cette catégorie, parmi elles le théorème de la caractérisation de la filtration de Krull grâce au foncteur de Lannes. En utilisant la théorie des représentations, Schwartz a démontré ce théorème dans les années 90s. Au cours du chapitre, on donne une preuve élémentaire de ce théorème. Une méthode efficace pour construire des résolutions à partir des suites exactes dans cette catégorie y est introduite ainsi. On l’appelle pseudo-hyper résolution. La catégorie des foncteurs polynomiaux stricts homogènes de degré fini a été reliée avec la catégorie des modules instables d’après les travaux de Hai en 2010. Le foncteur connectant ces deux catégories est nommé d’après lui. On montre dans le deuxième chapitre que ce foncteur est pleinement fidèle, permettant de considérer la catégorie des foncteurs polynomiaux stricts homogènes de degré fini comme une sous-catégorie pleine de la catégorie des modules instables. Le chapitre 3 est consacré pour étudier les résolutions injectives minimales des cohomologies de sphères. On montre que le morphisme à la Bockstein permet de déterminer une grande partie de ces résolutions. Dans le dernier chapitre, on étudie l’action de la torsion de Frobenius sur les groupes d’extensions. Ceci amène à étudier la résolution injective minimale du module F(1), étant générateur projectif monogène engendré par un élément de degré 1. De l’information partielle de la partie nilpotente de cette résolution est donnée à la fin du chapitre<br>The aim of this work is to study injective resolutions of certain objects in the category U of unstable modules. More precisely, we concentrate on the minimal injective resolution of the module F(1) as well as ones of the cohomology of spheres ΣnF2.For that purpose, the pseudo-hyper resolution is introduced, allowing to construct an explicit resolution of an unstable module from an acyclic sequence admitting this module as its first homology. This construction and the hyper resolution do look alike but are not identical. In our situation, we consider the sequence without splitting it into short exact sequences to avoid unnecessary concerns about the differentials. Placing the resolutions of each term in the sequence together, we obtain a fake double complex. Fortunately, the injectivity of modules in this double complex allow us to insert enough differentials that make the total sequence a complex. This complex is indeed the resolution for the considered module. To deal with the particular cases of ΣnF2, the pseudo-hyper resolution wil be translated into the algorithm BG. Together with this procedure, the Bockstein sequence gives a simple description on a large part of the minimal injective resolution of ΣnF2.The minimal injective resolution of F(1) is too much to deal with. Few results on this matter have been known. Luckily the nilpotent part of this resolution is quite accessible. Using the computations on the derived functors `∗(F(1)) and the groupes Ext we first show that this part is periodic and then give a simple description for several terms. These are crucial to show that the natural map ExtrU (ΦnF(1),ΦnF(1)) → ExtrU Φn+1F(1),Φn+1F(1) is injective in many cases.The work is also decorated with a new elemenatary proof on the characterization of the Krull filtration and a fully faithful embedding from the category Pd to the category U

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12

Osmanagic, Enver. "Bezout orders and Krull rings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ59650.pdf.

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13

Krull, Annika [Verfasser]. "Versagensanalyse modularer Revisionsendoprothesen / Annika Krull." Düren : Shaker, 2019. http://d-nb.info/1188553534/34.

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14

Nascimento, Mauri Cunha do. "Interseção de dominios de Krull." [s.n.], 1990. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306464.

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Orientador: Antonio Jose Engler<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Científica<br>Made available in DSpace on 2018-07-13T23:06:07Z (GMT). No. of bitstreams: 1 Nascimento_MauriCunhado_D.pdf: 2115074 bytes, checksum: 2c766688ef5db1f778940d8f38b1f0df (MD5) Previous issue date: 1990<br>Resumo: Não informado<br>Abstract: Not informed<br>Doutorado<br>Doutor em Matemática

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15

Woodward, Alex. "Rings and modules with Krull dimension." Thesis, University of Glasgow, 2007. http://theses.gla.ac.uk/118/.

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This thesis concerns the interplay between the structures of modules and those of their overlying rings; investigating finite annihilation, prime submodules, boundedness and the relationships between various forms of Krull dimension.

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16

Al-Thani, Shaikha Jabor. "The construction of Krull-Schmidt categories." Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303784.

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17

Kroll, Oliver [Verfasser]. "Arbeitszeitkonten und ihre Abwicklung. / Oliver Kroll." Berlin : Duncker & Humblot, 2011. http://d-nb.info/1238344569/34.

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18

Siengchin, Suchart [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, Jürgen [Akademischer Betreuer] Tröltzsch, Thomas [Gutachter] Lampke, and André [Gutachter] Wagenführ. "Natural Fiber Reinforced Thermoplastics / Suchart Siengchin ; Gutachter: Lothar Kroll, Thomas Lampke, André Wagenführ ; Lothar Kroll, Jürgen Tröltzsch." Chemnitz : Universitätsbibliothek Chemnitz, 2017. http://d-nb.info/121437686X/34.

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19

Ulke-Winter, Lars [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, and Piotr [Gutachter] Gendarz. "Naturanaloge Optimierungsverfahren zur Auslegung von Faserverbundstrukturen / Lars Ulke-Winter ; Gutachter: Lothar Kroll, Piotr Gendarz ; Betreuer: Lothar Kroll." Chemnitz : Universitätsbibliothek Chemnitz, 2017. http://d-nb.info/1214376851/34.

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20

Gelbrich, Sandra [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, Frank [Gutachter] Dahlhaus, and Adam [Gutachter] Niesłony. "Funktionsintegrative Leichtbaustrukturen für Tragwerke im Bauwesen / Sandra Gelbrich ; Gutachter: Lothar Kroll, Frank Dahlhaus, Adam Niesłony ; Betreuer: Lothar Kroll." Chemnitz : Universitätsbibliothek Chemnitz, 2018. http://d-nb.info/1214648797/34.

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21

Cascella, Kévin. "Impact du réchauffement climatique sur le krill en milieux polaires : thermotolérance et réponse Hsp70." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066646/document.

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Les zones polaires sont les premières à subir les effets du réchauffement climatique.L'estimation de l‟impact physiologique d‟une augmentation de température sur les espèces de ces régions est capitale afin de prédire l'évolution des écosystèmes polaires. Les conséquences physiologiques de l‟augmentation des températures peuvent affecter les capacités de résistance et de survie des organismes. Le krill constitue un maillon clé des écosystèmes polaires, il est aussi à la base de la chaine trophique de ces régions. Dans ce contexte, une étude comparative de la thermotolérance de trois espèces de krill polaires a été effectuée. Deux espèces d‟Antarctique Euphausia superba et Euphausia crystallorophias, et une espèce d‟Arctique, Thysanoessa inermis. La détermination de la température limite de tolérance (CT50) a été estimée sur ces 3 espèces. E. superba et T. inermis présentent des tolérances thermiques similaires, alors que E. crystallorophias a une CT50 légèrement inférieure. Cinq isoformes d‟Hsp70 ont été caractérisées, pour chaque espèce. Leur expression génique a été suivie au cours d‟augmentations de la température du milieu. Le suivi de ces biomarqueurs a permis d‟estimer la température limite à laquelle les premiers dommagescellulaires apparaissent. Les cinétiques d‟expressions de chaque espèce se sont révéléesdifférentes : une forte réponse Hsp70 a été observée chez T. inermis, alors que chez E.crystallorophias celle–ci est beaucoup plus faible. Aux mêmes températures E .superba ne développe pas de réponse Hsp70, malgré sa forte thermotolérance. La multiplication des expériences de choc thermique sur cette espèce (intensité et durée) n'a pas révélé de réponseHsp70, mais confirmé sa grande thermotolérance pour un organisme antarctique<br>Polar regions are the first to be impacted by global warming. The physiological impact appraisal of a temperature increase over local species is critical to foresee future evolutions of polar ecosystems. Physiological consequences of temperature rises can affect organisms both in their hardness and survival. Krill stands as a key component for polar ecosystems and therefore constitutes the core diet of local predators. In such context, a thermal tolerance comparative analysis of three distinct polar krill species has been carried out: two Antarctic species Euphausia superba and Euphausia crystallorophias, and one Arctic species,Thysanoessa inermis. The determination of thermal tolerance (CT50) was conducted on these three species. E. superba and T. inermis analysis showed similar thermal tolerances, while E.crystallorophias CT50 was slightly lower. Five isoforms of Hsp70 have been characterized foreach species. Their gene expression has been monitored through temperature increases of their environment. This biomarkers monitoring allowed an estimation of the critical temperature at which cellular damages appear. Kinetic expressions vary for each species: a strong response was observed in Hsp70 T. inermis, whereas response is much lower in E.crystallorophias. For similar temperatures, E .superba does not provide any Hsp70 response,despite its high thermal tolerance. The accumulation of heat shock experiments on this species, in intensity and duration, still did not provide any Hsp70 response, although it confirmed its highly noticeable heat tolerance for an Antarctic organism

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22

Hoyer, Stefan [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, and Bernd [Gutachter] Platzer. "Neuartige Warmmahltechnologie zum Recycling von Elastomeren und Analyse prozessbedingter Eigenschaften / Stefan Hoyer ; Gutachter: Lothar Kroll, Bernd Platzer ; Betreuer: Lothar Kroll." Chemnitz : Universitätsbibliothek Chemnitz, 2018. http://d-nb.info/1214649521/34.

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23

Menzel, Christoph [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, and André [Gutachter] Wagenführ. "Technologieentwicklung zur großserientauglichen Herstellung automobiler Interieur-Bauteile in neuartiger Sandwichbauweise / Christoph Menzel ; Gutachter: Lothar Kroll, André Wagenführ ; Betreuer: Lothar Kroll." Chemnitz : Universitätsverlag Chemnitz, 2020. http://d-nb.info/1220943371/34.

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24

Kroll, Mattias [Verfasser]. "Strukturanalyse staubiger Plasmen mittels digitaler Holographie / Mattias Kroll." Kiel : Universitätsbibliothek Kiel, 2010. http://d-nb.info/1020002328/34.

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25

Gouveia, Roberta de Araújo. "Efeitos psicofarmacológicos do óleo de krill em camundongos." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/8803.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-01-30T14:52:04Z No. of bitstreams: 1 arquivo total.pdf: 977684 bytes, checksum: 2c0212ba73478698d80000576996a9f2 (MD5)<br>Made available in DSpace on 2017-01-30T14:52:04Z (GMT). No. of bitstreams: 1 arquivo total.pdf: 977684 bytes, checksum: 2c0212ba73478698d80000576996a9f2 (MD5) Previous issue date: 2016-04-04<br>Epilepsy is a neurological disease characterized by long duration disorders, where the most severe episode of this disorder is associated with seizure attacks. Science has been seeking new drugs, as well as unconventional treatments to provide quality of life for individuals affected by this disease. There is scientific evidence of an association between the fatty acid content of the diet and specific changes in neurotransmission system, especially polyunsaturated fatty acids, which are able to alter neuronal excitability, act as neuroprotective, in addition to possess anticonvulsant. This study aimed to investigate the possible anticonvulsant effects of krill oil (rich in polyunsaturated fatty acids) in the central nervous system of mice, evaluating even if it interferes with locomotor and / or muscle relaxation activity, and it has effects sedatives common to anticonvulsant drugs. We used 100 male Swiss mice were divided into control group (CG) received distilled water and krill Group (GK), which received the krill oil, both by gavage and the amount administered 1ml/100g of animal weight / day, for 30 days. Behavioral changes were analyzed on the 31st day through convulsive experiments (pilocarpine, electroshock and pentylenetetrazol), anxiolytics experiments (activity monitor, open, rota-rod and the elevated plus-maze). In the electroshock test the group submitted to supplementation with krill oil presented a shorter seizure when compared to the control group. In pentylenetetrazol test (PTZ) GK obtained a higher latency to onset of first seizure in addition to the reduction in tonic seizures and tonic-clonic, when compared to the CG. In the apparatus of the open field, it was observed an increase in immobility time, reduction in input frequency in the central quarters of the krill group, plus a reduction in peripheral ambulation compared to the control group. In Activity Monitor test, animals in the supplemented group traveled a shorter distance, less uptime and lower speed when compared to the control group. The results of the entry number in both the open arms and in the closed arms of the maze as well as the time spent in the open arms was not statistically significant, it was applied to pilocarpine and the test route rod. On krill oil the above is a possible candidate for the adjunctive treatment of seizures.<br>A epilepsia é uma doença caracterizada por transtornos neurológicos de longa duração, onde o episódio mais grave dessa patologia está associado a crises de convulsão. A ciência vem buscando novos fármacos, assim como tratamentos não convencionais para fornecer qualidade de vida aos indivíduos acometidos por essa doença. Há evidências científicas de uma associação entre o conteúdo de ácidos graxos da dieta e mudanças específicas no sistema de neurotransmissão, com destaque para os ácidos graxos poliinsaturados, que são capazes de alterar a excitabilidade neuronal, agirem como neuroprotetores, além de possuirem ação anticonvulsivante. O presente estudo teve como objetivo investigar os possíveis efeitos anticonvulsivantes do óleo de krill (rico em ácidos graxos poliinsaturados) no sistema nervoso central de camundongos, avaliando ainda se o mesmo interfere na atividade locomotora e/ou no relaxamento muscular, bem como se possui efeitos sedativos comuns a fármacos anticonvulsivantes. Foram utilizados 100 camundongos Swiss machos, divididos em Grupo Controle (GC) que recebeu água destilada, e Grupo Krill (GK), que recebeu o óleo de krill, ambos por gavagem sendo a quantidade administrada 1mL/100g de peso do animal/dia, durante 30 dias. As alterações comportamentais foram analisadas no 31°dia por meio dos experimentos convulsivantes (pilocarpina, eletro-choque e pentilenotetrazol), experimentos ansiolíticos (monitor de atividade, campo aberto, rota-rod e o labirinto em cruz elevado). No teste do eletrochoque o grupo submetido à suplementação com óleo de krill apresentou um menor tempo de convulsão quando comparado ao grupo controle. No teste pentilenotetrazol (PTZ) o GK obteve uma maior latência para o aparecimento da primeira convulsão, além da diminuição das convulsões tônicas e tônico-clônicas,quando comparado ao GC. No aparelho do campo aberto, foi observado um aumento do tempo de imobilidade, redução na frequência de entrada nos quadrantes centrais do grupo krill, além de uma redução na ambulação periférica quando comparado ao grupo controle. No teste do monitor de atividades, os animais do grupo suplementado percorreram uma menor distância, com menor tempo de atividade e uma menor velocidade, quando comparado ao grupo controle. A análise dos resultados do número de entrada, tanto nos braços abertos quanto nos braços fechados do labirinto, bem como o tempo de permanência nos braços abertos, não demonstrou significância estatística, o mesmo foi aplicado para o teste de pilocarpina e o rota rod. Diante do exposto o óleo de krill é um possível candidato ao tratamento coadjuvante da convulsão.

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26

Gevorgyan, Arusjak. "Development of a phylogenomic framework for the krill." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355387.

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Over the last few decades, many krill stocks have declined in size and number,likely as a consequence of global climate change (Siegel 2016). A major risk factoris the increased level of carbon dioxide (CO2) in the ocean. A collapse of the krillpopulation has the potential to cause disruption of the ocean ecosystem, as krill arethe main connection between primary producers such as phytoplankton and largeranimals (Murphy et al. 2012). The aim of this project is to produce the firstphylogenomic framework with help of powerful comparative bioinformatics andphylogenomic methods in order to find and analyse the genes that help krill adaptto its environment. Problem with these studies is that we still do not have access toa reference genome sequence of any krill species. To strengthen and increase trustin our studies two different pipelines were performed, each with different OrthologyAssessment Toolkits (OATs), Orthograph and UPhO, in order to establish orthologyrelationships between transcripts/genes. Since UPhO produces well-supportedtrees where the majority of the gene trees match the species tree, it isrecommended as the proper OATs for generating a robust molecular phylogeny ofkrill. The second aim with his project was to estimate the level of positive selectionin E. superba in order to lay a foundation about level of selection acting on proteincodingsequences in krill. As expected, the level of selection was quite high in E.superba, which indicates that krill are adapted to the changing environment bypositive selection rather than natural genetic drift.

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27

Chibloun, Rachid. "Dimension de Krull de l'algèbre symétrique d'un module." Montpellier 2, 1989. http://www.theses.fr/1989MON20144.

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Dans ce travail on determine le degre de transcendance d'une algebre integre de type fini, ce qui nous permettra de trouver la dimension de krull de l'algebre symetrique d'un module de type fini sur un anneau noetherien. En appliquant ces resultats, on montre que la dimension d'un anneau gradue noetherien quotiente par un ideal premier et la dimension du meme anneau quotiente par l'ideal premier gradue correspondant sont egales ou leur difference est 1. Ensuite, on determine la hauteur de l'ideal des relations d'un module de type fini sur un anneau noetherien et la hauteur d'un ideal gradue maximal de l'algebre symetrique. Enfin, en exprimant les resultats obtenus en fonction des ideaux de fitting, on montre que la difference dim s#a(m)(dim a+rang(m)) peut etre non nulle et de meme, si s#a(m):ax#1, x#2,. . . , x#n/i, la difference dim ax#1, x#2,. . . , x#n(dim s#a(m)+hti) n'est pas nulle

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28

Cipro, Caio Vinicius Zecchin. "Ocorrência de compostos organoclorados em Euphausia superba e em ovos gorados de pingüins do gênero Pygoscelis." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/21/21133/tde-19072007-110620/.

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Bifenilos policlorados (PCBs) e pesticidas organoclorados são compostos que não ocorrem naturalmente no ambiente e não são facilmente degradados química ou microbiologicamente. Seu estudo no ambiente é importante devido à sua persistência, toxicidade, lipossolubilidade e conseqüente biomagnificação. Por isso, representam a maioria dos poluentes orgânicos persistentes (POPs) considerados prioritários pela UNEP (United Nations Environmental Programme) e banidos ou restritos pela Convenção de Estocolmo, de maio de 2001. Tais poluentes podem ser facilmente emitidos para a atmosfera, atingindo áreas remotas como a Antártida, integrando um processo cíclico de contaminação conhecido como destilação global. No presente trabalho otimizou-se uma metodologia analítica capaz de detectá-los em ovos gorados de pingüins e indivíduos de krill coletados na Baía do Almirantado, Ilha Rei Jorge, Antártida. Tal metodologia foi avaliada e enquadrou-se em critérios internacionais de controle de qualidade. Os compostos mais presentes foram, de um modo geral, os PCBs, DDTs e o HCB e a ocorrência pareceu ser espécie-específica dentro do gênero Pygoscelis. Em todos os casos, o teor dos compostos não foi superior ao de aves árticas em nível trófico semelhante. A análise do krill permitiu estimar a biomagnificação dos compostos encontrados nos ovos, cuja única fonte de contaminação é a transferência fêmea-filhote.<br>Polychlorinated biphenyls (PCBs) and organochlorine pesticides are compounds that do not occur naturally in the environment and are not easily degraded by chemical or microbiological action. Their study in the environment is important due to persistence, toxicity, liposolubility and consequent biomagnification. For these reasons, they represent the majority of the persistent organic pollutants (POPs), considered to have priority by the UNEP (United Nations Environmental Programme) and banished and/or restricted by the Stockholm Convention of May, 2001. Such pollutants can be easily ejected into the atmosphere and reach areas as remote as Antarctica, integrating a cyclical contamination process known as ?global distillation?. In the present work an analytical methodology capable of detecting such compounds in unhatched penguin eggs and whole krill was optimized. The samples were collected in Admiralty Bay, King George Island, Antarctica. This methodology was evaluated and fitted international quality control criteria. The compounds found in higher levels were, in most of the samples, the PCBs, DDTs and HCB and the occurrence seemed to be species-specific for the Pygoscelis genus. In all of the cases, the levels found were not higher than the ones in arctic birds in a similar trophic level.The krill samples analysis made it possible to estimate the biomagnification of the compounds found in eggs, whose only source of contamination is the female-offspring transfer.

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Seung, Taehun [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, and Piotr [Gutachter] Gendarz. "Holistic-Lightweight Approach for actuation systems of the next generation aircraft / Taehun Seung ; Gutachter: Lothar Kroll, Piotr Gendarz ; Betreuer: Lothar Kroll." Chemnitz : Universitätsverlag Chemnitz, 2019. http://d-nb.info/1219581917/34.

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30

Pond, David William. "A lipid budget for Antarctic krill (Euphausia superba Dana)." Thesis, University of Stirling, 1993. http://hdl.handle.net/1893/21431.

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Microplankton at five sites off South Georgia in January to February 1991 was dominated by a range of diatoms. The haptophyte Phaeocystis was present in three of the five sites but in low abundance only. Diatoms dominated at a more southerly site near the Antarctic Peninsula in March, whereas dinoflagellates dominated at a site near Deception Island. Multivariate analysis allowed the seven sites to be distinguished on the basis of microplankton species composition. Analysis of thirteen lipid classes present in total lipid extracted from the microplankton also demonstrated substantial differences from site to site. Multivariate analysis showed a different pattern of variation from the species ordination, with the South Georgia sites forming a distinct cluster. Outlier sites identified in the species and lipid ordinations confirmed the association between some taxonomic groups and lipid 'fingerprints'. Fatty acids extracted from total lipid in microplankton at five sites around South Georgia and two sites near the Antarctic Peninsula ranged from 37 to 195 J.Lg1-1, with a ratio of fatty acids in polar lipid: neutral lipid ranging from 4: 1 to 1:2. A further eleven particulate samples analysed from sites around the Antarctic Peninsula had slightly lower fatty acid content with a mean of 50 J.Lg1-1. Fatty acids in polar lipid were rich in (n-3) polyunsaturated fatty acids, chiefly 20:5(n-3). However, 22:6(n-3) could be as abundant as 20:5(n-3) in polar lipid from microplankton less than 20 J.1m, and also in dinoflagellate-rich microplankton. Neutral lipid was dominated by 16:0, 16:1(n-7) and 18:1(n-9) fatty acids and contained only low levels of (n-3) polyunsaturated fatty acids. The data reveal the high nutritional quality of microplankton lipids in the Southern Ocean for filter feeding animals, including krill. Samples of krill from eight sites around South Georgia consisted predominantly of immature animals, and females were entirely absent from samples from two of the eight sites studied. Animal wet mass varied from 0.16-1.72 g (median values of 0.47, 1.15 and 1.46 g for immatures, males and females respectively). Lipid amounts varied from 5-147 mg per animal (median values of 17.8, 21.0 and 73.3 mg for immatures, males and females respectively). Triacylglycerol (TAG) and phosphatidylcholine were the two most abundant lipid classes in all animals. Multivariate analysis of lipid composition indicated significant overlap between sex-maturity classes, although female krill tended to be distinguished from males by higher proportions of TAG and lower proportions of phosphatidylserine plus phosphatidylinositol. Reproductive investment is implicated in the overall variability in lipid content and composition, with females containing high lipid levels as reserves for egg production, whilst males showed apparent lipid deficits resulting from short-term mobilisation of storage material for spermatophore production and attachment. Significant and systematic site-to-site variability in lipid content and composition were evident in the samples and this could not be explained by the sex ratio or animal size. Such variability might have arisen from local patterns of krill distribution but could not be ascribed simply to temporal changes in lipid during the study. Immature Antarctic krill (length 40-45 mm) maintained in an aquarium for up to nine months were fed dense suspensions of cultures of two algal taxa, the haptophyte /sochrysis and the diatom Thalassiosira. Following acclimation to the experimental feeding regime, the animals were transferred to identical containers holding cultures of the same alga already labelled with [14C]bicarbonate. Faecal pellets collected after transfer showed detectable radioactivity after 30 minutes for /sochrysis and 55 minutes for Thalassiosira, providing an estimation of gut throughput time. With both algal cultures, radioactivity in faecal pellets increased over the 4-5 hour collection period. However, whilst faecal pellets derived from Isochrysis showed a rapid initial increase followed by an approach to a plateau value, the radioactivity in Thalassiosira-derived pellets increased steadily. A first-order kinetic model fitted to these data showed a more rapid turnover time for Isochrysis (k = 47 min) than for Thaiassiosira (k = 256 min). The assimilation efficiency based on the ratio of ingested radiolabelled lipid to that egested in faeces was 86% for /sochrysis and 63% for Thalassiosira, whereas corresponding efficiencies calculated from mass lipid budgets were 75% for /sochrysis and 77% for Thalassiosira. Analysis of fatty acid content and composition of total lipid from algae, krill and faecal pellets established that all dietary fatty acids were very efficiently ssimilated although there was a relatively preferential excretion of saturated fatty acids. All the assimilated fatty acids were extensively catabolised with the possible exceptions of saturated fatty acids and 18:4. Evidence was obtained for some biosynthesis of saturated fatty acids from non-lipid dietary precursors and for a limited conversion of 18:3 to 18:4 Collating the data presented in this thesis in a budget indicates that under suitable conditions, Euphausia superba is capable of acquiring the lipid necessary for growth and reproduction over time scales of only a few weeks and certainly within a single summer. Hence, krill appears to be an animal capable of high energy throughput and high reproductive output.

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Rinberg, Roman [Verfasser], Lothar [Akademischer Betreuer] Kroll, Lothar [Gutachter] Kroll, and André [Gutachter] Wagenführ. "Technologieentwicklung zur Herstellung von naturfaserverstärkten Bauteilen in Leichtbauweise unter Einsatz von Ganzpflanzenrohstoffen / Roman Rinberg ; Gutachter: Lothar Kroll, André Wagenführ ; Betreuer: Lothar Kroll." Chemnitz : Universitätsbibliothek Chemnitz, 2013. http://d-nb.info/1214009573/34.

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32

Kroll, Hannes [Verfasser]. "Blood-pool Kontrastmittel-verstärkte Ganzkörper MR Angiographie / Hannes Kroll." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2010. http://d-nb.info/102395706X/34.

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33

Krull, Christoph [Verfasser]. "Optimization and Automation of Artificial Tick Feeding / Christoph Krull." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1212031822/34.

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34

Kroll, Dennis [Verfasser]. "Implizite Positionierung unter Nutzung des Smartphone-Kompasses / Dennis Kroll." Kassel : Universitätsbibliothek Kassel, 2019. http://d-nb.info/1187164690/34.

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35

Kröll, Kirstin [Verfasser]. "Mittelfristige Ergebnisse nach Implantation einer Knie-Totalendoprothese / Kirstin Kröll." Köln : Deutsche Zentralbibliothek für Medizin, 2013. http://d-nb.info/1032350091/34.

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36

Dawdry, Nicola Elizabeth. "Diel vertical migration and feeding by krill Meganyctiphanes norvegica." Thesis, University of Plymouth, 2004. http://hdl.handle.net/10026.1/2602.

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The diel vertical migration (DVM) of zooplankton has been extensively studied and reviewed. Yet the controlling mechanisms for DVIVI are still uncertain, although several hypotheses, e. g. predator evasion, hunger - satiation, light avoidance, have been proposed. This is particularly so for krill. An important part of understanding krill DVM depends on explaining the factors which drive krill to the surface waters at night. It is frequently speculated that krill migrate to the surface layers to feed. Although there is a vast literature on krill feeding (and the pattern of krill DVM) there has been little attempt to establish the role of feeding in DVIVI. Consequently, the main aims of this thesis were to further explore the mechanisms for krill DVIVI and also to explain the feeding strategy of krill in order to understand the role of feeding in DVM, using Northern krill Meganyctiphanes norvegica as a model system. These aims were achieved by examining the following: whether krill are selective feeders and also whether the morphology of the feeding basket constrains the food types that can be handled by krill; whether krill feed throughout DVM; the relationship between krill metabolism and feeding during DVM. Krill showed significantly greater feeding rates with larger food types compared with smaller food types and this size selection appeared to be at least in part related to the morphology of the feeding basket. Above all it seemed that krill were opportunistic omnivores and the food types handled by krill were affected by the morphology of the feeding basket. Krill also showed significantly greater feeding rates when' offered food types available during the night compared with during the day. Gut contents from field caught individuals supported that krill did not feed extensively during the day as day caught individuals had significantly less stomach pigment content compared with night caught individuals. As krill appeared to not feed extensively on day time available food types it raised the question 'is there a cost to not feeding extensively during the day'. There did appear to be a cost to the lower daytime feeding than compared with the greater feeding shown both with night time available food types and from night captured individuals. It was hypothesized that krill may break down their respiratory pigment, haemocyanin (Hc) possibly for nutrition during these periods of low feeding during the day. In a field experiment, day captured krill had significantly lower Hc concentrations ([Hcl) than individuals captured at night. There was a clear cost to the lower [Hc] of day caught krill as concentrations of lactic acid in the haemolymph (indicating an 02 debt) were significantly greater in these day captured krill than compared with night captured krill. Consequently it seems that krill break down Hc during the day probably for nutrition because, for whatever reason, they do not feed extensively on the food types available to them in the deeper depths they reside within during the day. As they ascend to the surface layers at night, where they feed to significantly greater levels on the available food types, they appeared to rebuild their [Hc] and recover from the 02 debt they incurred during the day. Feeding experiments examining the recovery of [Hc] with food types available during either the day or night showed that after starvation krill recovered their [Hc] significantly quicker (and possibly to higher levels) with night available food types compared with day available food types. As they appear to be opportunistic omnivores it is proposed that this feeding strategy would facilitate the recovery of their daytime incurred debts. Krill appeared to show an asynchronously DVIVI and in particular female krill appeared to ascend to the surface layers of the water column earlier than males. In fact female krill showed a more extreme pattern of metabolism during DVIVI, with significantly greater [Hc] (ca. twice that of males) but also greater lactate debts with the breakdown of their Hc during the day. The earlier ascent to the surface layers and also the much greater [Hc] of females may indicate that they have greater metabolic demands than males. The asynchronous pattern of krill DVIVI supports the hunger - satiation hypothesis for DVM. If satiation is modified to also include the recovery of daytime incurred debts the findings of this thesis do indeed fit this hypothesis. A tentative model is proposed for krill DVM where krill break down their Hc during the day and then recover at night with feeding in the surface layers of the water column.

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37

Mori, Mitsuyo. "Modelling the krill-predator dynamics of the Antarctic ecosystem." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/8734.

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Includes bibliographical references (p. 281-303).<br>The main objective of this thesis is to model the krill-predator dynamics of the Antarctic ecosystem so as to determine whether predator-prey interactions alone can broadly explain observed population trends of the species considered in the model without any appeal to systematic effects possibly caused by environmental change. The history of human harvesting in the Antarctic is summarized brieﬂy, and the central role played by krill is emphasized. The background to the hypothesis of a krill surplus in the mid 20th Century is described, and the information, particularly regarding population trends, that has become available since the postulate was ﬁrst advanced is discussed. By reviewing the consumption and abundance estimates for various species in the Antarctic, it is evident that among the baleen whales, blue, fin, humpback and minke whales feed mainly on krill, and could collectively be consuming up to 120 million tons of krill in this region for each of the years around 1990. Of the seals, the Antarctic fur seals and crab-eater seals also feed mainly on krill, and these two species could be consuming up to 70 million tons of krill each year. Consumption estimates for other krill predators (birds, fish and cephalopods) are relatively poorly determined by comparison. Of these four baleen whale species, minke whales currently make the greatest impact on krill due to their large number at present compared to the other larger whale populations which are still depleted. Trend information suggests that the large baleen whales that were heavily depleted during the commercial whaling period are now recovering at rates in the vicinity of 10% per year, but there are some indications of a recent decrease in minke whale numbers. Thus, the consumption of krill by these large baleen whales has probably been increasing over recent years, though decreasing for minke whales. Updated and reﬁned catch-at-age analyses of minke whales for the International Whaling Commission (IWC) Management Areas IV and V suggest an increase in abundance of this species in the middle decades of the 20th Century to peak at about 1970, followed by a decline for the next three decades. Fitting the recruitment time trend obtained from these analyses to a stock-recruitment model suggests that minke whale carrying capacity first increased from about 1940 to 1960 followed by a 60% decrease from the 1960s to the present. General trends in the biological parameters of this species are consistent with such a decline. A predator-prey interaction model is developed including krill, four baleen whale (blue, fin, humpback and minke) and two seal (Antarctic fur and crab-eater) species. The model commences in 1780 (the onset of fur seal harvests) and distinguishes the Atlantic/Indian and Pacific sectors in view of the much larger past harvests in the former. A reference case and six sensitivities are fit to available data on predator abundances and trends, and the plausibility of the results and the assumptions on which they are based is discussed, together with suggested areas for future investigation. Amongst the key inferences of the study are that: i) species interaction effects alone can explain observed predator abundance trends, though not without some difficulty; ii) it is necessary to consider other species in addition to baleen whales and krill to explain observed trends, with crab-eater seals seemingly playing an important role and constituting a particular priority for improved abundance and trend information; iii the Atlantic/Indian region shows major changes in species abundances, in contrast to the Paciﬁc which is much more stable; iv) baleen whales have to be able to achieve relatively high growth rates to explain observed trends; v) species interaction effects impact the dynamics of these predators in ways that differ from what might be anticipated in a conventional single-species harvesting context, and they need to be better understood and taken into account in management decisions, and vi) Laws' (1977) estimate of some 150 million tons for the krill surplus may be appreciably too high as a result of his calculations omitting consideration of density dependent effects in feeding rates. . A priority for future work is to obtain improved estimates of the amount of krill consumed by other species, such as birds, cephalopods and fish as well as to obtain consensus on current abundance estimates for crab-eater seals and baleen whales (especially minke whales and also the associated abundance trend). Once such information is improved, more thorough sensitivity tests to the assumptions of the model and uncertainties in the abundance estimates of the species considered need to be explored. With such further development, it is hoped that such a model may ultimately assist in providing scientiﬁc advice for appropriate sustainable harvesting strategies for the Antarctic marine ecosystem taking species interactions into account, as this is a matter of key importance for the IWC and for the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR).

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38

Basson, Marinelle. "Population dynamics of krill interactions with its major predators." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47352.

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39

Krall, Markus [Verfasser]. "Das Kurs-Gewinn-Verhältnis am japanischen Aktienmarkt. / Markus Krall." Berlin : Duncker & Humblot, 2020. http://d-nb.info/1238252907/34.

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40

Prince, R. N. "On the theory of Krull rings and injective modules." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/22179.

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In the first chapter we give an outline of classical KRULL rings as in SAMUEL (1964), BOURBAKI (1965) and FOSSUM (1973). In the second chapter we introduce two notions important to our treatment of KRULL theory. The first is injective modules and.the second torsion theories. We then look at injective modules over Noetherian rings as in MATLIS [1958] and then over KRULL rings as in BECK [1971]. We show that for a KRULL ring there is a torsion theory (N,M) where N is the pseudo-zero modules and M the set of N-torsion-free (BECK calls these co-divisorial) modules. From LAMBEK [1971] there is a full abelian sub category C, namely the category of N-torsion-free, N-divisible modules, with exact reflector. We show in C (I) every direct sum of injective modules is injective and (II) C has global dimension at most one. It is these two properties that we exploit in the third chapter to give another characterization of KRULL rings. Then we generalize this to rings with zero-divisors and find that (i) R has to be reduced (ii) the ring is KRULL if and only if it is a finite product of fields and KRULL domains (iii) the injective envelope of the ring is semi-simple artinian. We then generalize the ideas to rings of higher dimension.

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41

Intira, Koomyart. "Subcritical Water Treatment of Isada Krill for Producing Seasonings." Kyoto University, 2016. http://hdl.handle.net/2433/217723.

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42

Ardakov, Konstantin. "Krull dimension of Iwasawa algebras and some related topics." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/251918.

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43

MONZANI, DEIVES. "Estudo experimental do processo de obtencao de zirconio metalico por magnesiotermia." reponame:Repositório Institucional do IPEN, 1989. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10222.

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Made available in DSpace on 2014-10-09T12:36:11Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:59:21Z (GMT). No. of bitstreams: 1 03662.pdf: 1769867 bytes, checksum: f9388ccdf39263ca6442c9016b5c7973 (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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44

Cresswell, Katherine A. "Behavioural models of penguins and krill in the Southern Ocean." Thesis, Open University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427734.

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45

Barriga, González Andrés Antonio. "Enzimas lipolíticas de krill antártico : purificación y caracterización, ¿enzimas adaptadas al frío?" Tesis, Universidad de Chile, 2006. http://repositorio.uchile.cl/handle/2250/105234.

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La temperatura es uno de los factores ambientales más importantes para la vida, siendo los ambientes fríos los que presentan la mayor distribución en la biosfera. Diferentes organismos han desarrollado diversas estrategias de tolerancia y adaptación al frío, entre ellas la síntesis de enzimas adaptadas/activas a bajas temperaturas. Estas enzimas especializadas se caracterizan por una alta eficiencia catalítica, temperaturas óptimas desplazadas a bajas temperaturas y termolabilidad a temperaturas moderadas. La disponibilidad del krill antártico, pequeño crustáceo explotado con fines comerciales, ha permitido el estudio de sus actividades enzimáticas. En el Centro de Ingeniería Bioquímica y Biotecnología los estudios se han centrado principalmente en la actividad proteasa y lipasa. Las enzimas lipolíticas están involucradas en le metabolismo lipídico, siendo las lipasas responsables de la hidrólisis y síntesis de triacilgliceroles. Basados en estos antecedentes se propone la siguiente hipótesis de trabajo: “el krill antártico Eupausia superba Dana posee enzimas lipolíticas adaptadas al frío, capaces de actuar in vitro a bajas temperaturas”, para el abordaje de esta hipótesis se desarrollaron tres objetivos específicos: (i) separación y obtención de enzimas lipolíticas de krill antártico, (ii) determinación de las características bioquímicas y fisicoquímicas de las enzimas lipolíticas purificadas y (iii) secuenciación y análisis de las secuencias de las enzimas lipolíticas de krill antártico. Se examinaron las condiciones para la obtención de un adecuado extracto enzimático, el procedimiento de autólisis a 40ºC durante 24 h o la homogenización a 8.300 rpm durante 1-2 min a 4ºC, permitió la obtención de un extracto con alta actividad lipasa específica. Se trabajó con dos enzimas lipolíticas de krill antártico, KL1 y KL2. La enzima lipolítica purificad KL1 presentó una masa molecular de 50 kDa y pI de 6,6 con una actividad sobre p-nitrofenilpalmitato (C16) de 2,9*103 U/mg a 20ºC y pH 8, presentó una temperatura óptima de 40ºC y pH óptimo de 9.KL1 exhibió un comportamiento inusual a temperaturas moderadas, sin embargo, a 10ºC retuvo el 23% de su actividad máxima, Se determinó una energía de activación de 24,7 kcal/mol (25-40ºC). Adicionalmente se caracterizó la enzima lipolítica KL2 previamente purificada que presentó una temperatura óptima a 37ºC y pH óptimo de 8, retuvo el 46% de su actividad máxima a 10ºC, Se determinó una energía de activación de 4,9 kcal/mol (10-37ºC). Las características de KL1 indiacarían que corresponde a una enzima mesofílica, en cambio, KL2 presentaría las propiedades de adaptación al frío (baja energía de activación y actividad a bajas temperaturas). El análisis de las secuencias de lipasas eucariontes realizado para el diseño de partidores para la identificación y ampliación PCR de genes de lipasa de krill antártico indicó que las lipasas presentan una baja similitud entre sus secuencias aminoácidos conservados contiguos y la peque ña longitud de las zonas conservadas, El análisis de las secuencias amplificadas por PCR no indicó similitud con lipasas. De igual modo el análisis de la secuencia parcial de KL2 tampoco mostró similitud significativa con lipasas, La ausencia de similitud probablemente se debería a las características antes señaladas de las lipasas, como también la posibilidad que correspondan a nuevas lipasas.

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46

Kroll, Mike [Verfasser], Julia [Gutachter] Tjus, and Horst [Gutachter] Fichtner. "Propagation of cosmic rays / Mike Kroll ; Gutachter: Julia Tjus, Horst Fichtner." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1138835730/34.

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47

Kroll, Henning [Verfasser]. "An exploration of recent changes in European regional policy / Henning Kroll." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1185066993/34.

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48

Kröll, Markus [Verfasser]. "Methode zur Technologiebewertung für eine ergebnisorientierte Produktentwicklung / vorgelegt von Markus Kröll." Heimsheim : Jost-Jetter, 2007. http://d-nb.info/99497096X/34.

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49

Kroll, Julia [Verfasser], and Alexander [Akademischer Betreuer] Verl. "Aufgabenangepasste, kontrollierte Oberflächenextraktion aus 3D-Computertomographiedaten / Julia Kroll. Betreuer: Alexander Verl." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1049438795/34.

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50

Grab-Kroll, Claudia [Verfasser]. "Evaluation einzelner MEDUlm–Individualisierungsstrategien im Ulmer Regelstudiengang Humanmedizin / Claudia Grab-Kroll." Ulm : Universität Ulm, 2021. http://d-nb.info/1226221785/34.

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