Dna Ploidy
Mostrando 1-12 de 95 artigos, teses e dissertações.
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1. Micropropagation and Cellular Behaviour Changes During in vitro Flowering of Impatiens balsamina
RESUMO: Neste estudo, a micropropagação de Impatiens balsamina foi estabelecida a partir de explantes de caule e parte aérea. Os efeitos do GA3 e da glutationa na morfogênese dessa espécie também foram investigados, de modo a induzir o florescimento in vitro. Verificou-se que a melhor regeneração in vitro de plantas foi obtida em meio MS adicionado c
Planta daninha. Publicado em: 10/06/2019
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2. Rat visceral yolk sac cells: viability and expression of cell markers during maternal diabetes
The function of the visceral yolk sac (VYS) is critical for embryo organogenesis until final fetal development in rats, and can be affected by conditions such as diabetes. In view of the importance of diabetes during pregnancy for maternal and neonatal health, the objective of this study was to assess fetal weight, VYS cell markers, and viability in female W
Braz J Med Biol Res. Publicado em: 10/07/2015
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3. Karyotype and genome size analyses in species of Helichrysum (Asteraceae)
Karyotype studies were performed in 18 populations of eight Helichrysum species in Iran. Those species showed chromosome numbers of 2n = 2x = 14; 2n = 4x = 24, 28 and 32; 2n = 6x = 36; 2n = 7x = 42; 2n = 8x = 48; 2n = 9x = 54; and 2n = 10x = 60. The chromosome numbers of H. davisianum, H. globiferum, H. leucocephalum and H. oocephalum are reported here for t
Acta Bot. Bras.. Publicado em: 2014-09
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4. Digestive and regenerative cells in the midgut of haploid and diploid males of the stingless bee Melipona quadrifasciata anthidioides (Hymenoptera: Apidae)
In eusocial bees, workers and queens are diploid (2n), whereas males are haploid (n). However, in some species, including the stingless bee Melipona quadrifasciata anthidioides Lepeletier, 1836, 2n males arise from fertilized eggs resulting from the crossing between a queen and her brother. In the present study, we provide a comparative analysis of the diges
Zoologia (Curitiba). Publicado em: 2012-10
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5. Karyotype differentiation in three species of Tripogandra Raf. (Commelinaceae) with different ploidy levels
Most species of the genus Tripogandra (Commelinaceae) are taxonomically poorly circumscribed, in spite of having a relatively stable basic number x = 8. Aiming to estimate the cytological variation among Tripogandra species carrying this base number, several structural karyotypic characters were investigated in the diploid T. glandulosa, the hexaploid T. ser
Genetics and Molecular Biology. Publicado em: 15/10/2010
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6. Clinicopathological features and DNA ploidy analysis of tongue squamous cell carcinoma in young patients : a collaborative international study / Analise das caracteristicas clinico-patologicas e da ploidia do DNA em pacientes jovens com carcinoma espinocelular de lingua : um estudo colaborativo internacional
Oral squamous cell carcinoma (SCC) predominately affects elderly patients and frequently develops in association with tobacco and alcohol consumption. However, an increasing of this malignant disease has been observed in patients younger than 40 years of age, who are not exposed to the traditional risk factors. Data regarding oral cancer in young patients ar
Publicado em: 2010
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7. Detection of diploid males in a natural colony of the cleptobiotic bee Lestrimelitta sp (Hymenoptera, Apidae)
When working at quantifying the genome size of stingless bees, it was observed that males of Lestrimelitta sp possessed the same amount of nuclear DNA as the females. Thus, we used flow cytometry (FCM) and cytogenetic analysis to confirm the ploidy of these individuals. The males analyzed proved to be diploid, since, through cytometric analysis, it was demon
Genetics and Molecular Biology. Publicado em: 2010
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8. Esôfago de Barrett: aspectos fisiopatológicos e moleculares da seqüência metaplasia-displasia-adenocarcinoma - artigo de revisão
The Barrett's esophagus (BE) is defined as endoscopically visible columnar mucosa at the distal esophagus, of any extension, proved to harbor intestinal metaplasia on biopsy, highlighted by the presence of goblet cells. BE denotes long-standing gastroesophageal reflux disease (GERD) and is an important risk factor for the development of esophageal adenocarci
Revista do Colégio Brasileiro de Cirurgiões. Publicado em: 2008-04
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9. Morfologia floral, citometria de fluxo e citogenética em Lycopersicon esculentum Mill. acesso BGH 160 / Floral morphology, flow cytometry and cytogenetic in Lycopersicon esculentum Mill. access BGH 160
Tomato (Lycopersicon esculentum Mill.) is the second most cultivated vegetable in the world. In Latin America the largest producer is Brazil, with a total area of 58,5 thousand hectares and production of 3,3 thousand tons. Part of the increase in production has been attributed to investments in breeding programs and to innovations generated by biotechnical p
Publicado em: 2006
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10. DNA ploidy, nuclear grade and architectural changes in ductal carcinoma in situ and in invasive female breast cancer: a contributory study for the model of disease progression / Ploidia de DNA, grau nuclear e alterações arquiteturais no carcinoma in situ e no carcinoma ductal invasivo da mama feminina: uma contribuição para o estudo do modelo de progressão de doença
Carcinogenesis is a multiple stage phenomenon. Epidemiologic evidence indicates that progression to invasive breast cancer begins in hyperplastic states of the epithelium passing by in situ carcinoma. The actual relationship that exists between ductal carcinoma in situ and invasive ductal carcinoma of the breast and the factors that lead to the tumor invasio
Publicado em: 2005
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11. Aspectos da oogenese do Chrysomya putoria (Wiedemann, 1830) (Diptera, calliphoridae)
This study was carried out to investigate some basic aspects concerning the reproductive biology of a blowfly, Chrydomya putoria (Ca11iphoridae) which has recently been introduced in Brazil.Adu1t flies were kept in cages and were fed on fresh cattle liver during 3 hours a day and water "adlibitum".Results showed that females presented a synchronic developmen
Publicado em: 1984
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12. Short-term significance of DNA ploidy and cell proliferation in breast carcinoma: a multivariate analysis of prognostic markers in a series of 308 patients.
AIM: To determine the importance of tumour DNA ploidy and cell proliferation, as measured by the S phase fraction (SPF), in relation to other established clinicopathological indicators of prognosis in breast cancer. METHODS: A prospective study of 308 patients. Tumours were staged following the TNM system criteria and were classified according to the histolo