Dissertations / Theses on the topic 'In vitro; Embryology'
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Uy, Gary D. "Studies on the control of diploid trophoblast growth in the mouse." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365366.
Full textNasr-Esfahani, Mohammad Hossein. "The role of reactive oxygen species in the vitro development of mouse embryos." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387105.
Full textXu, Jiasen. "A study of embryotrophic mechanism of human oviductal cells on mouse embryo development in vitro." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22926197.
Full textChan, Sin-ying Cindy. "In vitro effect of oviductal embryotrophic factors on the gene expressions of preimplantation mouse embryos." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31970916.
Full textBlack, David H. "Development of ovum pickup and in vitro embryo production to assess fertility responses for mineral intervention studies." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52598/.
Full text陳倩瑩 and Sin-ying Cindy Chan. "In vitro effect of oviductal embryotrophic factors on the gene expressions of preimplantation mouse embryos." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31970916.
Full textYu, Hing-Sing. "Studies on the toxicity and teratogenicity of cadmium on mouse pre-embryos in vitro and in vivo with special reference to their subsequent development /." [Hong Kong] : University of Hong Kong, 1987. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1221579X.
Full text許嘉森 and Jiasen Xu. "A study of embryotrophic mechanism of human oviductal cells on mouse embryo development in vitro." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B43894720.
Full textLawry, John R. "Characterization of the expression of glutamate dehydrogenase in preimplantation mouse embryos using competitive reverse transcription- polymerase chain reactions." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/917022.
Full textDepartment of Biology
Sedano, Rodolfo Canseco. "Effect of immunoglobulins on early bovine embryo development in vitro." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41575.
Full textMaster of Science
余慶聲 and Hing-Sing Yu. "Studies on the toxicity and teratogenicity of cadmium on mouse pre-embryos in vitro and in vivo with special reference to theirsubsequent development." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31231457.
Full textHajdu, Melissa Anne. "Effect of culture conditions, donor source, and injection site on in vitro development of deoxyribonucleic acid microinjected porcine zygotes." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12172008-063219/.
Full textSteeves, Tracey Elizabeth 1968. "The in vitro produced cow embryo : factors affecting development and metabolism." Monash University, Centre for Early Human Development, 2000. http://arrow.monash.edu.au/hdl/1959.1/8992.
Full textHopkins, Katherine Lee. "In vitro characterization of aromatase, estrone sulfotransferase and estrone sulfatase activities in the porcine placenta and endometrium at 30, 60 and 90 days of gestation." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45793.
Full textThe purpose of this investigation was to characterize the activities of three enzymes, aromatase, estrone (E1) sulfotransferase and E] sulfatase, in the porcine placenta and endometrium on d 30, 60 and 90 of gestation. These enzymes play key roles in determining in utero concentrations of estrogens. Days 30, 60 and 90 were chosen because previous investigations had determined that these were times of substantial changes in in vitro estrogen production by the porcine placenta and endometrium.
Master of Science
Pioltine, Elisa Mariano [UNESP]. "Sistema NPPC-NPR2 na espécie bovina: identificação em folículos antrais e modulação na concentração de nucleotídeos cíclicos e na expressão gênica de PDE3 em complexos cumulus-oócito." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/127782.
Full textEm camundongo, estudos recentes demonstraram que o precursor do peptídeo natriurético tipo C (NPPC) e o seu receptor do tipo 2 (NPR2) são essenciais para a manutenção do bloqueio da meiose I no oócito. Além disso, fatores parácrinos secretados pelo oócito, como a proteína morfogenética óssea (BMP15), podem modular esse bloqueio pelo estímulo da expressão do gene NPR2 nas células do cumulus de camundongos. Em recente estudo na espécie bovina, o fluido folicular bovino (FFb), quando adicionado ao meio de maturação, interferiu na maturação nuclear do oócito e, como resultado, melhorou a produção in vitro de embriões. Contudo, não são conhecidos quais os fatores, presentes no FFb, que são responsáveis por esse efeito podendo inclusive haver participação das microvesículas presentes neste. Além de ser um componente do FFb, foi demonstrado que o estradiol pode participar diretamente da estimulação do NPR2. Portanto, os objetivos gerais do presente trabalho envolvem a elucidação do sistema NPPC-NPR2 no ovário bovino e a investigação da influência do NPPC exógeno, do estradiol e das vesículas extracelulares sobre a expressão do gene da PDE3 no oócito bovino e sobre a concentração de nucleotídeos cíclicos nos complexos cumulus-oócito. Foram realizado s quatro experimentos: 1) Ensaio imunoenzimático (ELISA) para investigar a presença e a concentração do NPPC no fluido folicular, no lisado de células da granulosa mural e nas vesículas extracelulares, de acordo com a classe de diâmetro folicular (3 a 6 mm; 6 a 8 mm e >8 mm); 2) Imunolocalização do receptor NPR2 no folículo antral bovino; 3) Expressão do gene da PDE3 no oócito bovino, mediante RT - PCR em tempo real, em CCOs im aturos e maturados in vitro por 6 horas com NPPC exógeno, estradiol e vesículas extracelulares; 4) Mensuração da concentração de AMPc e GMPc, em oócitos e células...
In mice, recent studies have demonstrated that the natriuretic peptide precursor C (NPPC) and its type - 2 - receptor (NPR2) are essential for the maintenance of meiosis I arrest in the oocyte. Moreover, paracrine factors secreted by the oocyte such as bone mo rphogenetic protein 15 (BMP15) can modulate this arrest through the expression of the NPR2 gene in cumulus cells of mice. In a recent study in cattle, the bovine follicular fluid (bFF) added to the maturation medium was able to interfere with the oocyte nu clear maturation resulting in higher embryo yield in vitro . However, it is not known what factors present in bFF might be responsible for this effect and one candidate could be the presence of microvesicles in the bFF. Additionally, the estradiol hormone i s component of the bFF and was demonstrated to directly stimulate NPR2 expression. Therefore, the objectives of this work includes the investigation of the NPPC - NPR2 system in the bovine ovary and the assessment of the effects of exogenous NPPC, estradiol and extracellular vesicles on the expression of the PDE3 gene in bovine oocytes and the concentrations of cyclic - nucleotides in cumulus - oocyte complexes. We designed four experiments: 1) enzyme - linked immunosorbent assay (ELISA) for the presence and concen tration of the NPPC in follicular fluid, in the lysate of mural granulosa cells and in the extracellular vesicles, according to follicular diameter (3 to 6 mm, 6 to 8 mm, >8 mm); 2) Immunolocalization of NPR2 receptor in bovine antral follicles; 3) PDE3 ge ne expression in bovine oocyte by RT - PCR in real time, in immature COCs and in COCs in vitro matured for 6 h with exogenous NPPC, estradiol and extracellular vesicles; 4) Measurement of the concentration of cAMP and cGMP in oocytes and cumulus cells, respectively, either immature or matured in vitro for 6 h with exogenous NPPC or extracellular vesicles through specific...
Pioltine, Elisa Mariano. "Sistema NPPC-NPR2 na espécie bovina : identificação em folículos antrais e modulação na concentração de nucleotídeos cíclicos e na expressão gênica de PDE3 em complexos cumulus-oócito /." Assis, 2015. http://hdl.handle.net/11449/127782.
Full textCo-orientadora: Mariana Fernandes Machado
Banca: Marcelo Marcondes Seneda
Banca: Claudia Lima Verde Leal
Resumo: Em camundongo, estudos recentes demonstraram que o precursor do peptídeo natriurético tipo C (NPPC) e o seu receptor do tipo 2 (NPR2) são essenciais para a manutenção do bloqueio da meiose I no oócito. Além disso, fatores parácrinos secretados pelo oócito, como a proteína morfogenética óssea (BMP15), podem modular esse bloqueio pelo estímulo da expressão do gene NPR2 nas células do cumulus de camundongos. Em recente estudo na espécie bovina, o fluido folicular bovino (FFb), quando adicionado ao meio de maturação, interferiu na maturação nuclear do oócito e, como resultado, melhorou a produção in vitro de embriões. Contudo, não são conhecidos quais os fatores, presentes no FFb, que são responsáveis por esse efeito podendo inclusive haver participação das microvesículas presentes neste. Além de ser um componente do FFb, foi demonstrado que o estradiol pode participar diretamente da estimulação do NPR2. Portanto, os objetivos gerais do presente trabalho envolvem a elucidação do sistema NPPC-NPR2 no ovário bovino e a investigação da influência do NPPC exógeno, do estradiol e das vesículas extracelulares sobre a expressão do gene da PDE3 no oócito bovino e sobre a concentração de nucleotídeos cíclicos nos complexos cumulus-oócito. Foram realizado s quatro experimentos: 1) Ensaio imunoenzimático (ELISA) para investigar a presença e a concentração do NPPC no fluido folicular, no lisado de células da granulosa mural e nas vesículas extracelulares, de acordo com a classe de diâmetro folicular (3 a 6 mm; 6 a 8 mm e >8 mm); 2) Imunolocalização do receptor NPR2 no folículo antral bovino; 3) Expressão do gene da PDE3 no oócito bovino, mediante RT - PCR em tempo real, em CCOs im aturos e maturados in vitro por 6 horas com NPPC exógeno, estradiol e vesículas extracelulares; 4) Mensuração da concentração de AMPc e GMPc, em oócitos e células...
Abstract: In mice, recent studies have demonstrated that the natriuretic peptide precursor C (NPPC) and its type - 2 - receptor (NPR2) are essential for the maintenance of meiosis I arrest in the oocyte. Moreover, paracrine factors secreted by the oocyte such as bone mo rphogenetic protein 15 (BMP15) can modulate this arrest through the expression of the NPR2 gene in cumulus cells of mice. In a recent study in cattle, the bovine follicular fluid (bFF) added to the maturation medium was able to interfere with the oocyte nu clear maturation resulting in higher embryo yield in vitro . However, it is not known what factors present in bFF might be responsible for this effect and one candidate could be the presence of microvesicles in the bFF. Additionally, the estradiol hormone i s component of the bFF and was demonstrated to directly stimulate NPR2 expression. Therefore, the objectives of this work includes the investigation of the NPPC - NPR2 system in the bovine ovary and the assessment of the effects of exogenous NPPC, estradiol and extracellular vesicles on the expression of the PDE3 gene in bovine oocytes and the concentrations of cyclic - nucleotides in cumulus - oocyte complexes. We designed four experiments: 1) enzyme - linked immunosorbent assay (ELISA) for the presence and concen tration of the NPPC in follicular fluid, in the lysate of mural granulosa cells and in the extracellular vesicles, according to follicular diameter (3 to 6 mm, 6 to 8 mm, >8 mm); 2) Immunolocalization of NPR2 receptor in bovine antral follicles; 3) PDE3 ge ne expression in bovine oocyte by RT - PCR in real time, in immature COCs and in COCs in vitro matured for 6 h with exogenous NPPC, estradiol and extracellular vesicles; 4) Measurement of the concentration of cAMP and cGMP in oocytes and cumulus cells, respectively, either immature or matured in vitro for 6 h with exogenous NPPC or extracellular vesicles through specific...
Mestre
Fike, Kate E. "DEVELOPMENT AND COMMERCIALIZATION OF CIRCULATING FETAL CELL BASED TECHNOLOGY AS A NON-INVASIVE PRENATAL DIAGNOSTIC TOOL." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1621460632878665.
Full textHickman, Cristina Fontes Lindemann. "Environmental factors affecting interferon-τ expression and secretion by in vitro produced bovine blastocysts." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4399.
Full textBonavia, Sara. "An in vitro model for the mouse Epiblast to investigate the establishment of the antero-posterior polarity." Thesis, Université de Paris (2019-....), 2019. http://www.theses.fr/2019UNIP7120.
Full textThe development of an embryo is an interplay of phenomena, involving morphogenetic rearrangements, collective migration and cell differentiation. How a complex shape, made of many different tissues, arises from a symmetric pool of identical cells is still not fully unveiled. In this thesis, we are interested in understanding one of the first events that breaks the symmetry of the embryo and establishes a direction along which, the different tissues of the future body will be allocated: the establishment of the Antero-Posterior polarity (A-P), that will mark the locus at will gastrulation will start. How this axis is established has been partly elucidated. We know that the process is controlled by some chemical signalling, morphogens, released by some subgroups of cells in the extra-embryonic tissue. The minimal conditions for observing polarity however are still not clear. With this work we intend to build a synthetic in vitro system to find out the minimal ingredients to observe symmetry breaking in a symmetrical structure, that mimics the Epiblast in morphology and gene expression. We observe how this system reacts under homogeneous stimulation with morphogens. We compare the results obtained, to a situation where the symmetry of the stimulus is broken. To feed the cells with a directional stimulus, we make use of microfluidics: we developed a device that allows us to stimulate our synthetic Epiblast with a gradient of morphogens. Our original device was relying on continuous flow to establish a perfect sink and source to maintain the gradient. We observed a loss of Nodal expression that we did not observe when stimulating the organoids in bulk. We hypothesise the continuous flow to be accountable for washing out some secreted signalling downstream of the signal we induce differentiation with. By modifying the device to induce a uniform stimulation, but producing a gradient of secreted molecules, we were able to observe polarity arising in the organoids in a more consistent way than in bulk. We conclude that these experiments hint to the existence of a self-regulated mechanism in the embryo to establish polarity, and that this mechanism co-operate with others to ensure the robustness of the polarisation, and that a localised source of signalling molecules could be relevant to increase the frequency of observation of polarity in Embryonic Stem Cells only organoids. We anticipate that further studies making use of static gradients devices would allow to push this result further. Last, we propose a system that would allow the study of an underinvestigated aspect of development: the role pf physical confinement. As seen, the early embryo is confined by the Extra-embryonic tissue, applying a constraint to it. We suggest that it would be interesting to study the confinement aspect, uncoupling it from the signalling aspect. To do so, we propose to adapt an encapsulation method originally developed to grow cancer cells organoids, to encapsulate Embryonic Stem Cells
Junior, Antonio Euclides Pereira de Souza. ""Acetato de medroxiprogesterona administrado em período pré-natal induz hipospádia em machos e virilização em fêmeas de camundongos"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-17022006-105731/.
Full textIn vitro fertilization (IVF) has been associated with an increase incidence of hypospadias. IVF protocols require the maternal use of progesterone which may be a factor in causing hypospadias. To test these hypotheses in an animal model, we describe the effects of maternal progesterone exposure on genital development in mice. Medroxyprogesterone acetate (MPA) was administered by subcutaneous injection during the pre-natal period to wild type mice and animals knockout to androgen receptors (Tfm mice). Progesterone caused hypospadias in male mice fetuses, a virilizing effect in the female mice genitalia and didn't have any effect in Tfm animals
Leroux, Benoît. "Approches cytologique et pharmacologique de la levée des effets inhibiteurs exercés par l'éthylène sur l'embryogenèse de microspores isolées de colza et de chou-fleur." Rennes 1, 2007. http://www.theses.fr/2007REN1S074.
Full textTo obtain embryos from isolated microspores of cauliflower it is necessary to apply them a heat shock. However, in some instances this treatment is not found to be effective. We have hypothesized that embryogenesis could be inhibited by production in excess of the stress-hormone ethylene. Cytological and pharmacological studies have been developed to assess the involvement of ethylene in the control of development in microspores from the rape variety Topas. We demonstrated that weak reactivity of microspores was related with high ability to produce ethylene. This could be reversed through addition in culture media of ethylene biosynthesis inhibitors. The transposition of this approach to non-responsive microspores of cauliflower supported the inference that restricted embryogenesis is partly due to over-production of ethylene which can be counteracted. This indicated that the use of ethylene inhibitors could lead to relevant applications in production of doubled haploids of cauliflower
Beldjabri, Nacéra. "Culture in vitro chez diverses plantes florales (Lisianthus, pétunia, tabac et pervenche de Madagascar) dans le but d'embryogenèse somatique : obtention de cals et de régénérations." Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL116N.
Full textKandil, Mostafa. "Hérédité épigénique de vitro-variants obtenus par haplodiploïdisation chez l'Orge (Hordeum Vulgare) : analyse des croisements diallèles et de leurs descendances par autofécondation." Vandoeuvre-les-Nancy, INPL, 1990. http://www.theses.fr/1990INPL058N.
Full textMezzarobba, Antoine. "L'androgénèse "in vitro" chez le tournesol cultivé (Helianthus annuus L. )." Montpellier 2, 1988. http://www.theses.fr/1988MON20057.
Full textWongtiem, Prapit. "Propagation of Cassava (Manihot esculenta Crantz) by somatic embryogenesis." Angers, 2011. http://www.theses.fr/2011ANGE0072.
Full textCassava is one of the most important economic crops in Thailand. The increase demand for starch, animal feed and carburant ethanol will require an addition 4-6 million tons of fresh roots every year. A short term increase in production can be obtained from the dissemination of new clones with higher productivities. However, the diffusion rate of selected clones is limited by the traditional vegetative propagation method of this crop. Mass propagation by somatic embryogenesis (SE) can be a very promising technique to faster their diffusion to the farmers. This work aimed to establish different SE processes (primary, secondary and indirect SE) for five cassava clones selected by the Rayong Field Crops Research Center : R5, R7, R9, R72, R90. R9 has recently been selected for its suitability to produce ethanol. Primary somatic embryos were obtained from foliar explants for two clones (R9 and R90). Secondary SE cultures, also called cyclic, were established on solid and liquid media for the clone R9. . .
Alissa, Abdelrahman Asad. "Application de la culture "in vitro" à l'amélioration du tournesol Helianthus annuus." Montpellier 2, 1986. http://www.theses.fr/1986MON20038.
Full textGarret-Reolon, Sophie. "Etude des signaux induits lors de la locomotion des cellules de crêtes neurales aviaires in vitro." Paris 5, 1997. http://www.theses.fr/1997PA05S015.
Full textPedeboscq, Stéphane. "Etude in vitro des effets cytotoxiques et apoptotiques induits par divers agents anticancéreux sur cultures cellulaires de glioblastomes humains." Bordeaux 2, 2007. http://www.theses.fr/2007BOR21493.
Full textGlioblastoma multiforme is a malignant astrocytic tumor with median survival of about 12 months. Despite advances in surgical techniques and in the development of new protocols in radio- and chemotherapy, the prognosis remains poor and new therapeutic strategies are required. Therefore, we developed an in vitro model able to evaluate anticancer drug toxicity on cells obtained from individual glioblastoma patients. Anticancer agents tested were from different pharmacological classes alkylating agents (temozolomide, carboplatin and BCNU), tyrosine kinase inhibitor of EGFR (geftinib) and proteasome inhibitor (bortezomib). A cytotoxicity test using MTT was used to evaluate in vitro drug efficacy. Apoptosis was measured by flow cytometry using a fluorescent probe TMRM. EGFR and bcl-2 expressions were determined by a western blotting technique. On glioblastoma DBTRG05-MG cell line expressing high levels of EGFR, our results show a potentiation of temozolomide and carboplatin cytotoxity by the anti-EGFR grftinib. This is not observed on U87-MG cell line which do not express EGFR. Bortezomib shows a great toxicity on the two cell lines, at very low concentrations. The primary culture model permits to determine individual response for each patient, shows interindividual differences between patients and allow us to evaluate the in vitro efficacy of new molecules. Then, we could establish a correlation between the in vitro data determined with our study model and the clinical efficacy evaluated in the patient file. EGFR and bcl-2 status were assessed on each primoculture leading us to determinz a good and bad responder profile
Flores, Berrios Ericka Patricia. "Contrôle génétique de la régénération in vitro chez le tournesol (Helianthus annuus L. ) et identification des régions chromosomiqus impliquées." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT014A.
Full textZhong, Danni. "Culture "in vitro" d'anthères et de microspores isolées de tournesol cultivé (Helianthus annuus L. )." Montpellier 2, 1992. http://www.theses.fr/1992MON20265.
Full textAuboiron, Erik. "Influence des caractéristiques de l'atmosphère (gaz carbonique, éthylène, eau) et de la disponibilité en eau du milieu sur les cultures "in vitro" d'"Hevea brasiliensis"." Montpellier 2, 1991. http://www.theses.fr/1991MON20106.
Full textBardoul, Michèle. "Récepteurs AMPA et kai͏̈nate précoces dans le tronc cérébral embryonnaire : effets de leur blocage ou de leur stimulation "in vitro"." Montpellier 2, 1997. http://www.theses.fr/1997MON20177.
Full textMentewab, Ayalew. "Androgénèse in vitro chez le blé : utilisation pour la transformation génétique et l'amélioration de la résistance au stress hydrique." Toulouse, INPT, 1998. http://www.theses.fr/1998INPT001A.
Full textAhmad, Nazem. "La cinetique cellulaire de la premiere molaire inferieure de l'embryon de souris in vivo et in vitro." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13045.
Full textVerna, Jean-Marc. "Analyse "in vitro" de l'innervation sélective du derme et de l'épiderme chez l'embryon de poulet : rôle de divers facteurs d'origine matricielle et cellulaire." Grenoble 1, 1987. http://www.theses.fr/1987GRE10023.
Full textPeyrot, Elisabeth. "La concrête de fleurs du jasmin des Açores (Jasminum azoricum L. ). Recherches pour l'obtention "in vitro" de jasmins résistants au pourridié." Montpellier 2, 1993. http://www.theses.fr/1993MON20072.
Full textCharpentier, Gilles. "Etude d'un facteur testiculaire qui perturbe le developpement de l'ovaire du foetus de rat, in vitro." Paris 7, 1988. http://www.theses.fr/1988PA077032.
Full textRobert, Joe͏̈lle. "Influence de divers constituants de la matrice extracellulaire sur le comportement de cellules dermiques d'embryon de poulet cultivées in vitro." Grenoble 1, 1988. http://www.theses.fr/1988GRE10110.
Full textFremont, Patrick. "Differenciation en culture in vitro de myoblastes d'ebauches musculaires lentes et rapides de l'embryon d'oiseau : influence de l'innervation et de l'activite mecanique." Nantes, 1987. http://www.theses.fr/1987NANT2028.
Full textPAPASEIT, CYRIL. "Formation de motifs microtubulaires in vitro et dans l'embryon de drosophile par des processus dissipatifs de type réaction-diffusion." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10190.
Full textSUIGNARD, KHASKIYE GISELE. "Contribution a l'etude des modifications des proprietes fonctionnelles affectant les cardiomyoblastes isoles en culture in vitro et des mecanismes d'action de l'acetylcholine sur le myocarde embryonnaire de poulet." Nantes, 1987. http://www.theses.fr/1987NANT2026.
Full textHANTAZ-AMBROISE, DJENNET. "Differenciation des cellules de la moelle epiniere de rat in vitro : regulation de la croissance neuritique et de la maturation des cellules gliales." Paris 6, 1988. http://www.theses.fr/1988PA066653.
Full textChiwocha, Sheila. "Douglas fir megagametophyte development in situ and in vitro." Thesis, 2004. https://dspace.library.uvic.ca//handle/1828/9049.
Full textGraduate