Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"fertilisation"”.
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Carbon export from natural iron fertilisation in the Southern Ocean
… be<br/>enhanced with artificial mesoscale iron fertilisation. However, the ability of artificially<br/>induced phytoplankton blooms to efficiently sequester carbon to mesopelagic depths is<br/>still an open question. SubAntarctic islands in the HNLC Southern Ocean are a natural<br/>source of …
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Male gamete morphology in relation to swimming velocity and fertilisation microenvironment
… to the sperms primary functional role in fertilisation and reproduction, is not well understood. Research into the evolutionary significance of sperm morphology is concomitant with the study of sexual selection and the evolution of the biological diversity of life. The formulation of sperm …
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Changes in soil organic carbon in four long-term hayfield fertilisation experiments in Iceland:
Breytingar á kolefnismagni jarðvegs í fjórum langtíma áburðatilraunum: vöktun og spár hermilíkana. Landsvæði nýtt undir landbúnað og graslendi ná yfir stór svæði í heiminum. Kolefnisforði þessara svæða er að mestu að finna í jarðveginum. Landnýting hefur mikil áhrif á kolefnisforða jarðvegs. …
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A Mild Approach to In Vitro Fertilisation: The Complexity of Reproductive Decision-Making in Japan
Japan is distinct in its approach to in vitro fertilisation (IVF). Of all countries where IVF is widespread, the mild-stimulation protocol (mild IVF) is far more prevalent in Japan than anywhere else in the world. Although the efficacy of mild IVF has been extensively debated in medical research, …
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Psychological functioning in couples undergoing in vitro fertilisation (IVF) or donor insemination (DI) treatment for infertility
… attending one of two London clinics for in vitro fertilisation (IVF) or donor insemination (DI) treatment were assessed prior to treatment and approximately 9 months later. At initial assessment, fifty-nine women were interviewed and completed self-report questionnaires assessing state and trait …
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Heidegger's Hermeneutic Phenomenology and the Application to Ghanaian Women's Experiences of Unsuccessful Invitro Fertilisation (IVF) Treatment
… infertility problem, have been seeking invitro fertilisation treatment in the quest for motherhood, however there is a dearth in the nursing studies researching this phenomenon. It appears that the concept and meanings of infertility is inadequately explored from the perspective of women …
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Individuelle Unterschiede zwischen Bullen bei der in vitro Kapazitation und in vitro Fertilisation und deren Beziehung zur Non-Return-Rate
… Kapazitation und die Ergebnisse der in vitro Fertilisation zu untersuchen, und zu prüfen, ob ein Zusammenhang mit der in vivo Fruchtbarkeit der Bullen besteht. Zusätzlich wurde der Effekt unterschiedlicher Spermienkonzentrationen auf Parameter der in vitro Fertilisation sowie die Auswirkung …
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Untersuchungen über die Schwankungen der Spermienparameter im zeitlichen und jahreszeitlichen Verlauf sowie altersassoziierte Parameterveränderungen bei Patienten des Labors für In-vitro-Fertilisation der Universitätsklinik Würzburg
… bei Patienten des Labors für In-vitro-Fertilisation der Universitätsklinik Würzburg zu beurteilen führten wir eine retrospektive Datenanalyse durch. Die Daten basieren auf 3.873 Spermiogrammen, welche vom 1.1.1986 bis zum 31.12.1999 im oben genannten Labor durchgeführt wurden.Es wurden …
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ΕΠΙΔΡΑΣΗ ΤΟΥ ΑΝΤΑΓΩΝΙΣΜΟΥ ΚΑΙ ΤΗΣ ΞΕΝΗΣ ΓΥΡΗΣ ΣΤΗΝ ΠΡΟΟΔΟ ΓΙΑ ΑΠΟΔΟΣΗ ΣΤΟ ΒΙΟΜΗΧΑΝΙΚΟ ΗΛΙΑΝΘΟ (HELIANTHUS ANNUS L.)
… OF LACK OF COMPETITION WHICH FAVOURED SELF- FERTILISATION AND UNDER CONDITIONS WHICH FAVOURED CROSS- FERTILISATION. AFTER THE FIRST CYCLE OF SELECTION WITHOUT COMPETITION AND CONDITIONS WHICH FAVOURED SELF-FERTILISATION THE POPULATION YIELD INCREASED BY 26,0% UNDER COMPETITIVE CONDITIONS …
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Returning to the Path. A hermeneutic phenomenological study of parental expectations and the meaning of transition to early parenting in couples with a pregnancy conceived using in-vitro fertilisation.
… numbers of couples are undergoing In vitro fertilisation (IVF) after plans to commence their family is thwarted, a process involving greater psychological and physical demands which may heighten expectations of parenthood. The concept of good parenting is socially constructed and it may be …
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Programming of the paternal nucleus for embryonic development
… merely as a carrier of genetic material at fertilisation. However, it is known that sperm supports embryonic development better than other cell types, suggesting that it might also have additional important, non-genetic contributions to embryonic development. The work described in this …
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Studies on genetic aberrations as possible predictors of the outcome of assisted reproduction
… (ICSI) is more effective than classical in vitro fertilisation (IVF).DFI was predictive of the outcome of ART only when measured in neat semen, not in density gradient centrifuged. Moreover, the present studies have shown that, like the other sperm parameters, DFI is subject to a significant …
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Investigating the calcium wave and actin dynamics at Drosophila egg activation
… for embryogenesis. Typically associated with fertilisation, egg activation results in the resumption of the cell cycle, expression of maternal mRNAs and cross-linking of the vitelline membrane. While some aspects of egg activation, such as initiation factors in mammals and environmental cues …
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Development of an embryo-larval chronic toxicity test using the sea urchins Tripneustes gratilla and Echinometra mathaei
… testing purposes in South Africa through the fertilisation test (e.g. for testing effluents and seawater samples). However, this test has raised questions on the longer-term, sub-lethal effects of toxicants in effluents and other environmental media tested. The aim of this study was thus to …
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Investigating the role of the cytoskeleton and signalling in the self-incompatibility response of Papaver rhoeas
… hermaphrodite, which poses the problem of self-fertilisation and the subsequent loss of genetic fitness in the offspring. To prevent this, plants have developed a genetically controlled mechanism called self-incompatibility (SI) which allows self (incompatible) pollen to be recognised and …
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The effect of sperm apoptosis, Reactive Oxygen Species (ROS) and semen sample handling on sperm parameters and Assisted Reproductive Technology (ART) outcomes
… patients whose partners were undergoing in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) treatment cycles. In general, higher levels of apoptosis and ROS were associated with lower sperm motility, sperm count and advanced paternal age. No correlation was observed between …
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A study of the influence of sperm surface proteins on the activity of avian spermatozoa In-vitro and In-vivo
… fluid, postulated to be the milieu in which fertilisation takes place in-vivo, altered sperm surface antigenicity and reduced sperm motility in-vitro, suggesting that spermatozoa may naturally undergo oviduct-induced changes prior to fertilisation. <br/><br/>Sperm-egg interaction appears …
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