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RESUMO

Women have always played an important role in the development of toxicology all over the world. Specifically in Brazil, toxicology has had greater female representation than other countries, but women's participation at high hierarchical levels is low. Although more than 62% of the members of the Brazilian Society of Toxicology are women, only 7 out of the 22 presidents have been women throughout its 48 years of existence. This article aims to celebrate women in the field of toxicology in Brazil, based on interviews with five of these scientists who have changed the field of toxicology in Brazil as we know it today, each in their specific sub-areas. These women are: Dr. Ester de Camargo Fonseca Moraes, Dr. Silvia Berlanga de Moraes Barros, Dr. Alice Aparecida da Matta Chasin, Dr. Gisela de Aragão Umbuzeiro, and Dr. Tania Marcourakis. They are not only pioneers but they are also examples of admirable persistence in fighting the adversities presented to them. They broke the glass ceiling and opened doors for future generations of women in science. We hope that this article helps inspire women in their careers in toxicology.

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RESUMO

As large amounts of natural environments are lost due to urbanization, the role of remnant native vegetation in the preservation of biodiversity has become even more significant. Remnant native forest patches are essential refugia for flora and fauna and are crucial for the maintenance of ecosystem processes in urbanized landscapes. We evaluated the influence of landscape structure on ants and spiders associated with Atlantic Forest remnants in urban landscapes. We sampled 14 forest areas in the Metropolitan Region of Salvador and tested the effect of the landscapes' proportion of forest cover, mean landscape isolation, and mean landscape shape complexity on the taxonomic and functional richness and the community composition of both groups. The species collected were classified into functional groups based on behavioral attributes and environmental preferences. Overall, there were strong adverse effects of forest loss, decreased connectivity, and an increase in edge effects associated with the mean shape complexity of the forest remnants. However, the spiders responded to all three landscape structure characteristics whereas the ants only responded to the landscape mean shape complexity. Our findings indicate that the maintenance of urban forest habitats is essential for the conservation of biodiversity in the Metropolitan Region of Salvador and the preservation of ecological functions performed by species within the forest areas.

Assuntos

RESUMO

Women have always played an important role in the development of toxicology all over the world. Specifically in Brazil, toxicology has had greater female representation than other countries, but women's participation at high hierarchical levels is low. Although more than 62% of the members of the Brazilian Society of Toxicology are women, only 7 out of the 22 presidents have been women throughout its 48 years of existence. This article aims to celebrate women in the field of toxicology in Brazil, based on interviews with five of these scientists who have changed the field of toxicology in Brazil as we know it today, each in their specific sub-areas. These women are: Dr. Ester de Camargo Fonseca Moraes, Dr. Silvia Berlanga de Moraes Barros, Dr. Alice Aparecida da Matta Chasin, Dr. Gisela de Aragão Umbuzeiro, and Dr. Tania Marcourakis. They are not only pioneers but they are also examples of admirable persistence in fighting the adversities presented to them. They broke the glass ceiling and opened doors for future generations of women in science. We hope that this article helps inspire women in their careers in toxicology.

Assuntos

RESUMO

As large amounts of natural environments are lost due to urbanization, the role of remnant native vegetation in the preservation of biodiversity has become even more significant. Remnant native forest patches are essential refugia for flora and fauna and are crucial for the maintenance of ecosystem processes in urbanized landscapes. We evaluated the influence of landscape structure on ants and spiders associated with Atlantic Forest remnants in urban landscapes. We sampled 14 forest areas in the Metropolitan Region of Salvador and tested the effect of the landscapes’ proportion of forest cover, mean landscape isolation, and mean landscape shape complexity on the taxonomic and functional richness and the community composition of both groups. The species collected were classified into functional groups based on behavioral attributes and environmental preferences. Overall, there were strong adverse effects of forest loss, decreased connectivity, and an increase in edge effects associated with the mean shape complexity of the forest remnants. However, the spiders responded to all three landscape structure characteristics whereas the ants only responded to the landscape mean shape complexity. Our findings indicate that the maintenance of urban forest habitats is essential for the conservation of biodiversity in the Metropolitan Region of Salvador and the preservation of ecological functions performed by species within the forest areas.

RESUMO

Previous studies have reported on the glucose and lipid-lowering effects of ferulic acid (FA) but its anti-obesity potential has not yet been firmly established. This study investigated the possible anti-obesitogenic effects of FA in mice fed a high-fat diet (HFD) for 15 weeks. To assess the antiobesity potential of FA, 32 male Swiss mice, weighing 20-25 g (n=6-8 per group) were fed a normal diet (ND) or HFD, treated orally or not with either FA (10 mg/kg) or sibutramine (10 mg/kg) for 15 weeks and at the end of this period, the body weights of animals, visceral fat accumulation, plasma levels of glucose and insulin hormone, amylase and lipase activities, the satiety hormones ghrelin and leptin, and tumor necrosis factor-α (TNF-α) and monocyte chemoattractant protein-1 (MCH-1) were analyzed. Results revealed that FA could effectively suppress the HFD-associated increase in visceral fat accumulation, adipocyte size and body weight gain, similar to sibutramine, the positive control. FA also significantly (P<0.05) decreased the HFD-induced elevations in serum lipid profiles, amylase and lipase activities, and the levels of blood glucose and insulin hormone. The markedly elevated leptin and decreased ghrelin levels seen in HFD-fed control mice were significantly (P<0.05) reversed by FA treatment, almost reaching the values seen in ND-fed mice. Furthermore, FA demonstrated significant (P<0.05) inhibition of serum levels of inflammatory mediators TNF-α, and MCH-1. These results suggest that FA could be beneficial in lowering the risk of HFD-induced obesity via modulation of enzymatic, hormonal and inflammatory responses.

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RESUMO

O óleo essencial de erva-doce (OED) foi avaliado como alternativa aos antimicrobianos na ração de frangos de corte alojados em cama nova (CNo) e reciclada (CRe). Foram alojadas 1.050 aves, e adotou-se o delineamento inteiramente ao acaso, em que de um a 21 dias as aves foram mantidas somente em CNo, resultando em sete tratamentos com 10 repetições de 15 aves: T1= dieta controle positivo (CP) com antimicrobiano (ANT); T2= dieta controle negativo (CN) sem ANT e sem OED; T3= CN + 0,004% OED; T4= CN + 0,008% OED; T5= CN + 0,016% OED; T6= CN + 0,032% OED e T7= CN + 0,064% OED. De 22 a 42 dias, metade das aves foram criadas em CRe, e a outra metade em CNo, resultando em 14 tratamentos com cinco repetições de 15 aves. O OED foi adicionado pela manhã, na proporção de 1/4 do consumo diário da dieta, e, na parte da tarde, o fornecimento foi à vontade. Na fase pré-inicial, a inclusão de 0,015 e 0,026% de OED melhorou o consumo de ração e o ganho de peso, respectivamente. A inclusão de 0,031% de OED melhorou a conversão alimentar dos frangos de um a 21 dias. O OED promoveu maior peso de carcaça de aves alojadas em CNo, maiores pesos de coxa, sobrecoxa e rendimento de sobrecoxa de frangos criados em CRe. O OED melhorou o desempenho de frangos alojados sob condições de CRe.

The effect of essential fennel oil (EFO) as an alternative to antimicrobials in the diet of broiler chickens allotted on two type of new (LNo) and recycled (LRe) litter was evaluated. 1,050 birds were housed and adopted a completely randomized design in which from 1 to 21 days the birds were housed only LNo, with seven treatments and 10 replicates of 15 birds: T1 = positive control diet (PC) with antimicrobials (AM), T2 = negative control diet (NC) without AM and EFO, T3 = NC + 0.004% EFO, T4 = NC + 0.008% EFO, T5 = NC + 0.016% EFO T6 = NC + 0.032% EFO and T7 = NC + 0.064% EFO. From 22 to 42 days half of the birds housed in LRe and half continued in LNo, resulting in 14 treatments with five replicates of 15 birds. The EFO was added in the morning, at a ratio of 1/4 of the daily diet and in the afternoon the supply was at ease. In the pre-initial inclusion of 0.015 and 0.026% of EFO, feed intake and weight gain improved, respectively. The inclusion of 0.031% of EFO improved feed conversion of broilers from 1 to 21 days. The EFO promoted higher carcass in birds housed in LNo, higher drumstick weight, and thigh and drumstick yield for broilers reared in LRe. EFO improved the performance of chickens accommodated under LRe.

Assuntos

RESUMO

O óleo essencial de erva-doce (OED) foi avaliado como alternativa aos antimicrobianos na ração de frangos de corte alojados em cama nova (CNo) e reciclada (CRe). Foram alojadas 1.050 aves, e adotou-se o delineamento inteiramente ao acaso, em que de um a 21 dias as aves foram mantidas somente em CNo, resultando em sete tratamentos com 10 repetições de 15 aves: T1= dieta controle positivo (CP) com antimicrobiano (ANT); T2= dieta controle negativo (CN) sem ANT e sem OED; T3= CN + 0,004% OED; T4= CN + 0,008% OED; T5= CN + 0,016% OED; T6= CN + 0,032% OED e T7= CN + 0,064% OED. De 22 a 42 dias, metade das aves foram criadas em CRe, e a outra metade em CNo, resultando em 14 tratamentos com cinco repetições de 15 aves. O OED foi adicionado pela manhã, na proporção de 1/4 do consumo diário da dieta, e, na parte da tarde, o fornecimento foi à vontade. Na fase pré-inicial, a inclusão de 0,015 e 0,026% de OED melhorou o consumo de ração e o ganho de peso, respectivamente. A inclusão de 0,031% de OED melhorou a conversão alimentar dos frangos de um a 21 dias. O OED promoveu maior peso de carcaça de aves alojadas em CNo, maiores pesos de coxa, sobrecoxa e rendimento de sobrecoxa de frangos criados em CRe. O OED melhorou o desempenho de frangos alojados sob condições de CRe.(AU)

The effect of essential fennel oil (EFO) as an alternative to antimicrobials in the diet of broiler chickens allotted on two type of new (LNo) and recycled (LRe) litter was evaluated. 1,050 birds were housed and adopted a completely randomized design in which from 1 to 21 days the birds were housed only LNo, with seven treatments and 10 replicates of 15 birds: T1 = positive control diet (PC) with antimicrobials (AM), T2 = negative control diet (NC) without AM and EFO, T3 = NC + 0.004% EFO, T4 = NC + 0.008% EFO, T5 = NC + 0.016% EFO T6 = NC + 0.032% EFO and T7 = NC + 0.064% EFO. From 22 to 42 days half of the birds housed in LRe and half continued in LNo, resulting in 14 treatments with five replicates of 15 birds. The EFO was added in the morning, at a ratio of 1/4 of the daily diet and in the afternoon the supply was at ease. In the pre-initial inclusion of 0.015 and 0.026% of EFO, feed intake and weight gain improved, respectively. The inclusion of 0.031% of EFO improved feed conversion of broilers from 1 to 21 days. The EFO promoted higher carcass in birds housed in LNo, higher drumstick weight, and thigh and drumstick yield for broilers reared in LRe. EFO improved the performance of chickens accommodated under LRe.(AU)

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