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Gomes, Mayra Rodrigues

doi:10.11606/issn.1808-0820.cali.2005.61339

Cited by 5 publications

(11 citation statements)

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“…clathratus , the values obtained for DSL were compared based on the coefficient of variation (CV). Due to the heterogeneous degree of chromosome condensation among the cells, CV values up to 20% were considered statistically significant [ 65 ]. In T .…”

Section: Methodsmentioning

confidence: 99%

Insights into the origin of the high variability of multivalent-meiotic associations in holocentric chromosomes of Tityus (Archaeotityus) scorpions

Mattos

Carvalho

et al. 2018

PLoS ONE

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Scorpions represent an intriguing group of animals characterized by a high incidence of heterozygous chromosomal rearrangements. In this work, we examined six species of Tityus (Archaeotityus) from Brazilian fauna with a particular focus on elucidating the rearrangements responsible for the intraspecific variability of diploid number and the presence of long chromosomal chains in meiosis. To access any interpopulation diversity, we also studied individuals from four species representing distinct localities. Most species demonstrated intraspecific polymorphism in diploid number (2n = 19 and 2n = 20 in T. clathratus, T. mattogrossensis, and T. pusillus, 2n = 16, 2n = 17 and 2n = 18 in T. paraguayensis, and 2n = 16 and 2n = 24 in T. silvestris) and multi-chromosomal associations during meiosis I, which differed even among individuals with the same chromosome number. In some species, the heterozygous rearrangements were not fixed, resulting such as in Tityus clathatrus, in 11 different chromosomal configurations recognized within a same population. Based on meiotic chromosome behaviour, we suggested that independent rearrangements (fusion/fission and reciprocal translocations), occurring in different combinations, originated the multi-chromosomal chains. To evaluate the effects of these chromosome chains on meiotic segregation, we applied the chi-square test in metaphase II cells. The non-significant occurrence of aneuploid nuclei indicated that non-disjunction was negligible in specimens bearing heterozygous rearrangements. Finally, based on our analysis of many chromosome characteristics, e.g., holocentricity, achiasmate meiosis, endopolyploidy, ability to segregate heterosynaptic or unsynapsed chromosomes, ()n sequence located in terminal regions of rearranged chromosomes, we suggest that the maintenance of multi-chromosomal associations may be evolutionarily advantageous for these species.

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Section: Methodsmentioning

confidence: 99%

Insights into the origin of the high variability of multivalent-meiotic associations in holocentric chromosomes of Tityus (Archaeotityus) scorpions

Mattos

Carvalho

et al. 2018

PLoS ONE

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“…A multiple criteria decision problem is summed up as a situation that involves at least two criteria and two alternatives to choose from, and this decision is driven by the desire to satisfy several objectives, which may have conflicting relationships [29,30]. Thus, the multiple criteria decision aid (MCDA) or multiple criteria decision making (MCDM) comprises the analysis of decision problems presenting different points of views to be considered.…”

Section: Multiple Criteria Decision Aid-mcdamentioning

confidence: 99%

Multi-Criteria Methods Applied in the Studies of Barriers Identified in the Implementation of Reverse Logistics of E-Waste: A Research Agenda

et al. 2020

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Reverse logistics (RL) has emerged as a form of disposal and a conscious way to use products at the end of their use through the refurbishment, reuse, and recycling processes. Mainly in developing countries, there are still several barriers during the process of implementing reverse logistics, so decision-makers need to know what barriers to prioritize to propose a solution. This paper aims to investigate which multicriteria decision aid (MCDA) methods are most applied in the studies on barriers during the implementation of reverse logistics. For this purpose, we conducted a systematic literature review using a well-known and detailed protocol, considering various papers published in journals from the databases Science Direct, Emerald, Web of Science, and Google Scholar in the period from 2008 to 2019. As a result, a few studies discussing multicriteria methods were identified, analyzing the existing barriers to the implementation of reverse logistics. The main methods and criteria were gathered from the literature and were systematized and discussed to identify a research agenda. This paper contributes to the work carried out by researchers and practitioners in this field and can guide them in their choice of methods to approach decision-making related to reverse logistics.

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“…Gomes, 1984). Por meio da DRX, descobriu-se que as argilas são compostas principalmente por um grupo especialde filossilicatos, que são aluminossilicatos hidratados com estrutura em camadas.…”

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"Aplicação da difração e flourescência de raios-X (WDXRF): ensaios de argilominerais"

Scapin¹

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Clay minerals are structural elements of soil applied in agreement with its properties. The characterization of this material has been necessary for technological, environmental, ecological and legal factors. In this scope to make possible a fast methodology, safe and efficient is especially important. In this work two procedures are described, the first to identify the clay minerals found in loamy soils by x-ray diffraction and the second determine quantitative constituent macro and micro of the clay by x-ray fluorescence (WDXRF), applied the fundamental parameters method, that, it doesn't use calibration curves. Those procedures were applied in five soil samples given by a company of little, located in Ipube, Pe. The results by x-ray diffraction showed the predominance of the clays minerals kaolinite and illite, the ones which, they were confirmed by means of the quantitative analyses of the majority elements by x-ray fluorescence. The results for the minority elements they were compared with the values reference for soil published by CETESB.

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Entorno das identificações

Cited by 5 publications

References 0 publications

Insights into the origin of the high variability of multivalent-meiotic associations in holocentric chromosomes of Tityus (Archaeotityus) scorpions

Insights into the origin of the high variability of multivalent-meiotic associations in holocentric chromosomes of Tityus (Archaeotityus) scorpions

Multi-Criteria Methods Applied in the Studies of Barriers Identified in the Implementation of Reverse Logistics of E-Waste: A Research Agenda

"Aplicação da difração e flourescência de raios-X (WDXRF): ensaios de argilominerais"

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