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 59 for “"Sexual development"”.
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Lifecycle Progression And The Sexual Development Of The Apicomplexan Parasite Cryptosporidium Parvum
… results in stunted physical and mental development in children. Drugs and vaccines are needed to combat cryptosporidiosis, and a better understanding of the biology of the parasite will help in developing therapeutics against the parasite. Cryptosporidium has a single host lifecycle. …
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A Nonribosomal Peptide Pheromone Controls Male-Induced Female Sexual Development in Schistosoma mansoni
… physical pairing by the male worms to achieve sexual maturity for egg production. The stimulation of the pairing is even sufficient to induce parthenogenetic eggs from the females when insemination is artificially ablated. The molecular mechanism of the process is unknown despite the attention …
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The Role of the Nhlh2 Protein in Regulating Male Fertility and Sexual Development
… axis (HPG), which controls the development of primary and secondary sex characteristics. Signaling from the pituitary reaches the Leydig cells of the testis, which in response produce testosterone, leading to proper sexual development. Nhlh2 knockout mice (N2KO) show obesity, …
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Characterization of the hermaphroditic reproductive system and sexual development in the planarian Schmidtea mediterranea
When it comes to sexual reproduction, there are many means to an end. Although there are numerous types of mating systems and sex determination mechanisms, as well as different modes of germ cell development, there is one clear goal – to produce new offspring with unique genetic makeup. Scientists …
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Effects of endocrine disruptors in zebrafish (Danio rerio) as revealed with the fish sexual development test
… one central target of EDCs. Especially during sexual differentiation of organisms, the consequences of such a misbalance may easily lead to population-relevant effects. Thus research into EDCs has been massively intensified over the last decades. Since, at international levels, there is high …
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Anthropometric measurements, sexual development and serum reproductive hormonal levels among boys in the rural Western Cape
… of height, weight and BMI measurements; sexual matura tional assessment and a questionnaire (demographics and general medical history). Median of anthropometric variables and hormone levels by pubertal stage were compared with international references. Results: Median age of pubertal …
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CAPITALISM, CONTRACEPTION AND CHEMICALS: A MEDICAL ANTHROPOLOGICAL ANALYSIS OF THE PREMATURE SEXUAL DEVELOPMENT EPIDEMIC IN PUERTO RICAN FEMALES
… The Biosocial Exploration of Premature Sexual Development in Puerto Rico Objective: The purpose of this study was to argue for an anthropological approach in the investigation of the world’s highest recorded prevalence of precocious puberty and premature thelarche that occurred in …
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CAPITALISM, CONTRACEPTION AND CHEMICALS: A MEDICAL ANTHROPOLOGICAL ANALYSIS OF THE PREMATURE SEXUAL DEVELOPMENT EPIDEMIC IN PUERTO RICAN FEMALES
… The Biosocial Exploration of Premature Sexual Development in Puerto Rico Objective: The purpose of this study was to argue for an anthropological approach in the investigation of the world’s highest recorded prevalence of precocious puberty and premature thelarche that occurred in …
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Chararcterisation of fungal protein kinases involved in the regulation of the cell cycle of Saccharomyces cerevisiae and of sexual development in Aspergillus nidulans
In dieser Arbeit wurden einfache Modellorganismen, die Hefe Saccharomyces cerevisiae und der filamentöse Pilz Aspergillus nidulans, zur Charakterisierung von verschiedenen Faktoren genutzt, die an der Regulation des Zellzyklus und der Entwicklung beteiligt sind. In der Hefe wurde Clb5, eine …
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Development of female sex organs during aestivation in the alfalfa weevil, Hypera postica (Gyll.) (Coleoptera, Curculionidae)
… observations were conducted to ascertain the development of the female sex organs of the alfalfa weevil during aestivation, to study the role of this aestivation on sexual development, and to investigate the factors responsible for this interaction. Measurements of female sex organs were made …
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Laboratory observations on the life history and habits of the face fly, Musca autumnalis Degeer (Diptera: Muscidae)
… environmental factors which influenced the development and activities of the face fly. Rate of development in each stage under different ranges of temperature was emphasized. Similarly, observations were also made to determine the characteristic behavior of both larvae and adults in response …
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Investigating the role of the Apicoplast in Plasmodium falciparum Gametocyte Stages
… and eradication has led research to focus on sexual development of the malaria parasite. Sexual development is initiated when pre-destined intraerythrocytic ring stage parasites leave asexual reproduction and develop into gametocytes. A mosquito vector will ingest mature gametocytes during a …
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Understanding adolescent and young people’s sexual health and development in a public health context: research studies and interventions
Sexual health risk-taking behaviour is typically initiated during adolescence and continues throughout teenage years and early adulthood at higher levels than at other life stages. For some groups (e.g. deprived and vulnerable populations) the risks can be greater still. Risk behaviours in early …
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Sexuální výchova ve školách
… the theoretical part I described these issues - sexuality, sexual development, sexual rights and sex education. The second part is the research and deals with awareness and attitudes of students and teachers on sex education.
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THE ROLE OF DMRT GENES DURING NEUROGENESIS IN THE ZEBRAFISH FOREBRAIN
… transcription factors with important roles in sexual development as well as cell fate decisions in non-gonadal tissues. I aimed to analyse the roles of dmrt3 and dmrt5 during forebrain development in zebrafish. Here I show that dmrt5 is a critical regulator of neuronal differentiation in the …
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Diferentes apresentações clínicas da Síndrome de Swyer: relatos de casos
x development caused by mutations in genes located in the Y chromosome. It’s typically described in female individuals with a 46XY karyotype and streak gonads, and it’s normally diagnosed in adolescence because of the absence of menstruation, with or without the spontaneous female sexual …
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STUDIES ON THE SUBCELLULAR LOCALIZATION OF 3-BETA- HYDROXYSTEROID DEHYDROGENASE IN STEROIDOGENIC CELLS
… as congenital adrenal hyperplasia and disrupted sexual development. There are several isoforms of HSD3B in mice and humans that show distinct tissue expressions in organs like the adrenal cortex and gonads. However, its subcellular localization that provides the cellular site of enzyme activity …
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Role of Estrogenic Biomarkers in the Prediction of Disease Risk/Survival in Postmenopausal Women
The role of estrogens extends far beyond that of sexual development in females. Results from population-based studies indicate that estrogenic factors have a role to play in diseases affecting postmenopausal women. However studies investigating the role of estrogenic biomarkers in association to …
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Sex in Cryptococcus: Signaling, Mating-type Locus Evolution and Gene Silencing
… of the pheromone signaling pathway that controls sexual development. Two MAT-linked meiotic recombination hotspots that likely drove the assembly and rearrangement of MAT were identified. Fine mapping through the integration of genetic markers established that two hotspots, one on each side of the …
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