https://repositorio.uema.br/jspui/handle/123456789/2009 2026-04-17T09:53:16Z https://repositorio.uema.br/jspui/handle/123456789/6035 Título: Efeitos biológicos da poluição hídrica do Rio Itapecuru na cidade de Caxias-MA Abstact: Currently, there is a serious water crisis caused by anthropogenic issues. It is extremely important to understand how anthropic activities influence the quality of aquatic ecosystems from the perspective of restoring degraded ecosystems, aiming to restore their ecological integrity. The objective of this work research was to analyze the biological effects of water pollution in the Itapecuru river in the city of Caxias-Ma. For the collection of water samples, five points were chosen, being described in P1, P2, P3, P4 and P5, from the upstream downstream on the banks of the Itapecuru river. The collections were made in two periods, between “November and December” and the rainy period “May”. The water samples were taken to the Physical-Chemistry Laboratory of SAAE (Autonomous Water and Sewage Service) for physical-chemical analysis. Subsequently, microbiological tests were carried out using the Multiple Tubes method, and the genotoxic test using Allium cepa as bioindicator. The waters of the Itapecuru River are polluted in the collected areas. They had a high iron content, yellowish color and turbidity in both analyzed periods. The microbiological test showed the presence of microorganisms such as bacteria and fungi. Despite the absence of heavy metals and chromosomal alterations (genotoxicity) in the analyzed water, the possibility of its toxic potential is not ruled out 2023-07-13T00:00:00Z https://repositorio.uema.br/jspui/handle/123456789/6034 Título: Levantamento e tratamento taxonômico de bignoniaceaejuss. no município de Caxias, Maranhão, Brasil Abstact: BignoniaceaeJuss. It is found predominantly in neotropical regions. In Brazil there are 420 species, of which 212 are endemic and most species occur in the Southeast, North and Northeast. Among thestates in this region with more species records are Bahia, Maranhão and Piauí, however, there is no record ofstudies on the floristic survey of the Bignoniaceaefamily in the state of Maranhão. With this, the work aimed to carry out a floristic survey and taxonomic treatment of the species of Bignoniaceae, in the municipality of Caxias, Maranhão, Brazil. The raised species were described, and from these descriptions an identification key was elaborated for the studied species. Expeditions were carried out for observation, collection and identification of botanical materialin 6points ofthe municipality, which identified12 specimens, distributed in 5 genera and 6 species, with the most representative genus being Tabebuia with two species. However, there was a collection of the species Handroanthusimpetiginosus, which is on a near threatened scale. Based on the data obtained, it is important to state that the city of Caxias - MA, has a considerable diversity of species of Bignoniaceae, with a greater frequency of ipês, as they are widely used for afforestation in the municipality. Finally, the results of the research contributed to the knowledge of the flora of East Maranhão. In addition to serving as a basis for future scientific research of a floristic/taxonomic nature, thus enriching the knowledge of the Bignoniaceae family for the municipality of Caxiasand for the State of Maranhão 2023-07-20T00:00:00Z https://repositorio.uema.br/jspui/handle/123456789/6033 Título: O gênero sida L. (Malvaceae) no município de Caxias, Maranhão, Brasil Abstact: Malvaceae is one of the largest families of angiosperms, with approximately 243 genera and 4,300 species, distributed in the Neotropics, with Sida being one of the most representative genera of this family, characterized by having a “simple calyx”. This research aims to carry out the taxonomic treatment of the species of the genus Sida of the Malvaceae family for the municipality of Caxias-MA, cataloging and characterizing the morphological aspects of the species. To carry out the research, monthly expeditions were carried out from August 2022 to June 2023, for the collection and subsequent herborization of the collected material. Specimens were analyzed and identified based on specialized bibliographies and identification keys. In all, nine species of the genus were found, with Sida rhombifolia being the most representative, occurring in eight collection points. In view of the data presented, it is pointed out that the area of the Municipality of Caxias, presents a relevant diversity of species of the genus Sida. Thus, the results of this research contribute in a relevant way to the knowledge of the flora of the municipality of Caxias 2023-07-19T00:00:00Z https://repositorio.uema.br/jspui/handle/123456789/6032 Título: Síntese verde e estabilização de nanopartículas de prata em morinda citrifolia L. (NONI) como coadjuvante no tratamento de câncer Abstact: Cancer is one of the main public health problems in the world, with no cure and aggressive treatments. Silver nanoparticles (AgNPs) are one of the most studied and used nanomaterials, due to their characteristic properties, and can be used to treat and diagnose cancers. Morinda citrifolia L. (noni) has been systematically explored for the biosynthesis of metallic nanoparticles, also due to its antitumor activity. The aim of this research was to synthesize and stabilize AgNPs in noni plant extract by means of green synthesis. AgNPs were synthesized using silver nitrate and sodium citrate, confirming the reduction of silver by the change in color of the nitrate/citrate solution. AgNP characterization was carried out using the ultravioletvisible (UV-Vis) light spectroscopy method, showing an absorbance band around 400 nm indicating the formation and stabilization of AgNPs. The genotoxic evaluation of the AgNPs was carried out using the Allium cepa test with root germination in 19 bulbs out of the 30 placed in the bioassay. The genotoxicity varied according to the different concentrations, with groupA showing a stable mitotic index (MI) and a low chromosome alteration index (CAI); group B with a MI and CAI below group A; C1 with a high MI and CAI also high in relation to group A; C2 with a MI above that found in group A, but a CAI above the values found in groups A, B and C1; C3 with a MI below that found in all groups except B and a CAI above that found in group A and below that found in subgroups C1 and C2, revealing a medium degree of genotoxicity of AgNPs at a concentration of 50%. This study showed that AgNPs stabilized in noni extract showed average genotoxicity, showing promise in the production of a phytotherapeutic adjuvant in the treatment of cancer 2024-02-20T00:00:00Z