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Id: lil-623599
Autor: Soares, C. M. A; Urmenyi, T. P; Ferreira, C. S; Carvalho, E. F. de; Carvalho, J. F. O; Rondinelli, E; Castro, F. T. de.
Título: Thermal and developmental regulation of gene expression in Trypanosoma cruzi
Fonte: Mem. Inst. Oswaldo Cruz;83(supl.1):337-344, Nov. 1988. ilus.
Idioma: en.
Conferência: Apresentado em: Annual Meeting on Basic Research in Chagas's disease, 15, Apresentado em: Meeting of the Brazilian Society of Protozoology4, Caxambu, 7-10 Nov. 1988.
Descritores: Trypanosoma cruzi/genética
Tubulina (Proteína)/uso terapêutico
-Regulação da Expressão Gênica
Temperatura Alta
Responsável: BR1.1 - BIREME


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Id: lil-777218
Autor: SANT’ANNA JUNIOR, Arnaldo; GUERREIRO-TANOMARU, Juliane Maria; MARTELO, Roberta Bosso; SILVA, Guilherme Ferreira da; TANOMARU FILHO, Mário.
Título: Filling of simulated lateral canals with gutta-percha or thermoplastic polymer by warm vertical compaction
Fonte: Braz. oral res. (Online);29(1):1-6, 2015. tab, ilus.
Idioma: en.
Projeto: Fundação de Amparo à Pesquisa do Estado de São Paulo.
Resumo: The aim of this study was to evaluate the ability of gutta-percha and a thermoplastic synthetic polymer (Resilon) to fill simulated lateral canals, using warm vertical compaction. Forty-five single-rooted human teeth were prepared using the rotary crown-down technique. Artificial lateral canals were made at 2, 5, and 8 mm from the working length (WL) in each root. The specimens were divided into three groups (n = 15), according to the filling material: Dentsply gutta-percha (GD), Odous gutta-percha (GO), and Resilon cones (RE). The root canals were obturated using warm vertical compaction, without endodontic sealer. The specimens were subjected to a tooth decalcification and clearing procedure. Filling of the lateral canals was analyzed by digital radiography and digital photographs, using the Image Tool software. The data were subjected to the Kruskal-Wallis and Dunn tests at 5% significance. RE had the best filling ability in all root thirds (p < 0.05), with similar results for GO in the coronal third. In the middle and apical thirds, GD and GO had similar results (p > 0.05). Resilon may be used as an alternative to gutta-percha as a solid core filling material for use with the warm vertical compaction technique. The study findings point to the potential benefit of the warm vertical compaction technique for filling lateral canals, and the study provides further information about using Resilon and gutta-percha as materials for the warm vertical compaction technique.
Descritores: Polímeros/química
Materiais Restauradores do Canal Radicular/química
Obturação do Canal Radicular/métodos
Guta-Percha/química
-Obturação do Canal Radicular/instrumentação
Teste de Materiais
Reprodutibilidade dos Testes
Estatísticas não Paramétricas
Radiografia Dentária Digital
Temperatura Alta
Limites: Seres Humanos
Tipo de Publ: Research Support, Non-U.S. Gov't
Estudos de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-1021034
Autor: Mihálik, Daniel; Gubisová, Marcela; Kraic, Ján; Hudcovicová, Martina; Havrlentová, Michaela; Moravcíková, Jana; Glasa, Miroslav; Matusíková, Ildikó.
Título: Introduction of a synthetic Thermococcus-derived α-amlyase gene into barley genome for increased enzyme thermostability in grains
Fonte: Electron. j. biotechnol;30:1-5, nov. 2017. ilus, tab, graf.
Idioma: en.
Projeto: Slovak Research and Development Agency.
Resumo: Background: The enzymes utilized in the process of beer production are generally sensitive to higher temperatures. About 60% of them are deactivated in drying the malt that limits the utilization of starting material in the fermentation process. Gene transfer from thermophilic bacteria is a promising tool for producing barley grains harboring thermotolerant enzymes. Results: Gene for α-amylase from hydrothermal Thermococcus, optimally active at 75­85°C and pH between 5.0 and 5.5, was adapted in silico to barley codon usage. The corresponding sequence was put under control of the endosperm-specific promoter 1Dx5 and after synthesis and cloning transferred into barley by biolistics. In addition to model cultivar Golden Promise we transformed three Slovak barley cultivars Pribina, Levan and Nitran, and transgenic plants were obtained. Expression of the ~50 kDa active recombinant enzyme in grains of cvs. Pribina and Nitran resulted in retaining up to 9.39% of enzyme activity upon heating to 75°C, which is more than 4 times higher compared to non-transgenic controls. In the model cv. Golden Promise the grain α-amylase activity upon heating was above 9% either, however, the effects of the introduced enzyme were less pronounced (only 1.22 fold difference compared with non-transgenic barley). Conclusions: Expression of the synthetic gene in barley enhanced the residual α-amylase activity in grains at high temperatures.
Descritores: Sementes/enzimologia
Hordeum/enzimologia
Thermococcus/metabolismo
alfa-Amilases/metabolismo
-Sementes/genética
Sementes/microbiologia
Transformação Genética
Hordeum/genética
Hordeum/microbiologia
Cerveja
Estabilidade Enzimática
Plantas Geneticamente Modificadas/enzimologia
Clonagem Molecular
Técnicas de Transferência de Genes
alfa-Amilases/genética
Fermentação
Termotolerância
Temperatura Alta
Concentração de Íons de Hidrogênio
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1008708
Autor: Valdebenito-Rolack, Emky; Ruiz-Tagle, Nathaly; Abarzúa, Leslie; Aroca, Germán; Urrutia, Homero.
Título: Characterization of a hyperthermophilic sulphur-oxidizing biofilm produced by archaea isolated from a hot spring
Fonte: Electron. j. biotechnol;25:58-63, ene. 2017. tab, graf, ilus.
Idioma: en.
Projeto: FONDECYT.
Resumo: Background: Sulphur-oxidizing microorganisms are widely used in the biofiltration of total reduced sulphur compounds (odorous and neurotoxic) produced by industries such as the cellulose and petrochemical industries, which include high-temperature process steps. Some hyperthermophilic microorganisms have the capability to oxidize these compounds at high temperatures (N60°C), and archaea of this group, for example, Sulfolobus metallicus, are commonly used in biofiltration technology. Results: In this study, a hyperthermophilic sulphur-oxidizing strain of archaea was isolated from a hot spring (Chillán, Chile) and designated as M1. It was identified as archaea of the genus Sulfolobus (99% homology with S. solfataricus 16S rDNA). Biofilms of this culture grown on polyethylene rings showed an elemental sulphur oxidation rate of 95.15 ± 15.39 mg S l-1 d-1, higher than the rate exhibited by the biofilm of the sulphur-oxidizing archaea S. metallicus (56.8 ± 10.91 mg l-1 d-1). Conclusions: The results suggest that the culture M1 is useful for the biofiltration of total reduced sulphur gases at high temperatures and for other biotechnological applications.
Descritores: Sulfetos/metabolismo
Archaea/metabolismo
Biofilmes
-Oxirredução
Filogenia
Reação em Cadeia da Polimerase
Sulfolobus
Archaea/isolamento & purificação
Archaea/genética
Polietileno
Fontes Termais/microbiologia
Eletroforese
Filtração
Extremófilos
Temperatura Alta
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1008576
Autor: Deng, Nan; Liu, Caixia; Chang, Ermei; Ji, Jing; Yao, Xiamei; Yue, Jianyun; Bartish, Igor V; Chen, Lanzhen; Jiang, Zeping; Shi, Shengqing.
Título: High temperature and UV-C treatments affect stilbenoid accumulation and related gene expression levels in Gnetum parvifolium
Fonte: Electron. j. biotechnol;25:43-49, ene. 2017. ilus, tab, graf.
Idioma: en.
Projeto: State Key Laboratory of Tree Genetics and Breeding; . 948 project; . Fund of National Non-profit Research Institutions of CAF.
Resumo: Background: Gnetum parvifolium stems and roots have been used for a long time in traditional Chinese medicines. Stilbenes are bioactive compounds present in G. parvifolium plants, and they possess antioxidative and anticancer properties. However, little is known about the responses of G. parvifolium stilbene biosynthetic pathways to stress conditions. Therefore, we investigated stilbene biosynthesis, including the expression of relevant genes, in G. parvifolium exposed to high-temperature and ultraviolet-C treatments. Results: High temperatures did not influence the accumulation of total stilbenes in stems but decreased stilbene concentrations in roots at 3 h, with a subsequent restoration to control levels. In contrast, ultraviolet irradiation induced the accumulation of total stilbenes in stems but not in roots. We also observed that high temperatures inhibited the production of resveratrol and piceatannol in G. parvifolium stems and roots, whereas ultraviolet treatments initially inhibited their accumulation (up to 6 h) but induced their production at later time points. Analyses of specific genes (i.e., PAL, C4H, 4CL, STS, and CYP) revealed that their expression levels generally increased in stress-treated stems and roots, although there was some variability in the expression profiles during treatments. Conclusions: Our results indicated that high temperatures and ultraviolet irradiation differentially affect the biosynthesis of specific stilbenes in G. parvifolium stems and roots. Therefore, cultivating G. parvifolium seedlings under optimal stress conditions may increase the biosynthesis of specific stilbene compounds.
Descritores: Estilbenos/análise
Gnetum/metabolismo
-Estilbenos/efeitos da radiação
Estilbenos/metabolismo
Raios Ultravioleta
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Gnetum/efeitos da radiação
Gnetum/genética
Plântulas
Polifenóis/análise
Polifenóis/efeitos da radiação
Polifenóis/metabolismo
CHLOROFLUOROCARBONS, METHANE1
Temperatura Alta
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-895557
Autor: Borges, Karen A; Furian, Thales Q; Souza, Sara N; Menezes, Rafaela; Tondo, Eduardo C; Salle, Carlos T. P; Moraes, Hamilton L. S; Nascimento, Vladimir P.
Título: Biofilm formation capacity of Salmonella serotypes at different temperature conditions / Capacidade de produção de biofilme por cepas de diferentes sorovares de Salmonella em quatro temperaturas de incubação
Fonte: Pesqui. vet. bras = Braz. j. vet. res;38(1):71-76, Jan. 2018. tab.
Idioma: en.
Projeto: CNPq.
Resumo: Salmonella spp. are one of the most important agents of foodborne disease in several countries, including Brazil. Poultry-derived products are the most common food products, including meat and eggs, involved in outbreaks of human salmonellosis. Salmonella has the capacity to form biofilms on both biotic and abiotic surfaces. The biofilm formation process depends on an interaction among bacterial cells, the attachment surface and environmental conditions. These structures favor bacterial survival in hostile environments, such as slaughterhouses and food processing plants. Biofilms are also a major problem for public health because breakage of these structures can cause the release of pathogenic microorganisms and, consequently, product contamination. The aim of this study was to determine the biofilm production capacity of Salmonella serotypes at four different temperatures of incubation. Salmonella strains belonging to 11 different serotypes, isolated from poultry or from food involved in salmonellosis outbreaks, were selected for this study. Biofilm formation was investigated under different temperature conditions (37°, 28°, 12° and 3°C) using a microtiter plate assay. The tested temperatures are important for the Salmonella life cycle and to the poultry-products process. A total of 92.2% of the analyzed strains were able to produce biofilm on at least one of the tested temperatures. In the testing, 71.6% of the strains produced biofilm at 37°C, 63% at 28°C, 52.3% at 12°C and 39.5% at 3°C, regardless of the serotype. The results indicate that there is a strong influence of temperature on biofilm production, especially for some serotypes, such as S. Enteritidis, S. Hadar and S. Heidelberg. The production of these structures is partially associated with serotype. There were also significant differences within strains of the same serotype, indicating that biofilm production capacity may be strain-dependent.(AU)

Salmonella spp. são um dos mais importantes agentes causadores de doenças transmitidas por alimentos em vários países, inclusive no Brasil. Produtos avícolas e ovos são os principais alimentos envolvidos na transmissão dos sorovares de Salmonella que são responsáveis por surtos de salmonelose em humanos. Salmonella possui a capacidade de formar biofilmes em diversas superfícies. O processo de formação de biofilme depende da interação entre as células bacterianas, a superfície de adesão e as condições do ambiente onde a bactéria se encontra. Estas estruturas favorecem a sobrevivência bacteriana em ambientes hostis, como em matadouros-frigoríficos e em indústrias processadoras de alimentos. Biofilmes são um grande problema em saúde pública, pois a ruptura destas estruturas pode provocar a liberação de microrganismos patogênicos e, consequentemente, a contaminação dos produtos. O objetivo deste estudo foi avaliar a capacidade de produção de biofilme por diferentes sorovares de Salmonella submetidos a quatro temperaturas de incubação. Cepas de Salmonella de 11 sorovares foram selecionadas. A produção de biofilme foi avaliada através do método de incubação em microplacas de poliestireno incubadas a 37°, 28°, 12° e 3°C. Estas temperaturas são importantes durante o ciclo de vida de Salmonella e para o processamento de produtos avícolas. Do total de cepas avaliadas, 92,2% foram capazes de produzir biofilme em pelo menos uma das quatro temperaturas testadas. Neste estudo, 71,6% das cepas produziram biofilme a 37°C, 63% a 28°C, 52,3% a 12°C e 39,5% a 3°C, independentemente do sorovar. Os resultados indicam uma forte influência da temperatura na produção de biofilme, especialmente para os sorovares S. Enteritidis, S. Hadar e S. Heidelberg. A produção de biofilme está parcialmente associada com o sorovar da cepa. Também foi observado que existe variação quanto à produção destas estruturas dentro de um mesmo sorovar, indicando que possivelmente a produção de biofilme é cepa-dependente.(AU)
Descritores: Salmonella
Biofilmes
Sorogrupo
-Aves Domésticas/virologia
Temperatura Baixa
Temperatura Alta
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-893657
Autor: Figueiredo, Viviane Maria Gonçalves de; Pereira, Sarina Maciel Braga; Bressiani, Eduardo; Valera, Márcia Carneiro; Bottino, Marco Antônio; Zhang, Yu; Melo, Renata Marques de.
Título: Effects of porcelain thickness on the flexural strength and crack propagation in a bilayered zirconia system
Fonte: J. appl. oral sci;25(5):566-574, Sept.-Oct. 2017. tab, graf.
Idioma: en.
Projeto: US National Institute of Dental and Craniofacial Research.
Resumo: Abstract Objective: This study evaluated the influence of porcelain (VM9, VITA Zahnfabrik, Germany) thickness on the flexural strength and crack propagation in bilayered zirconia systems (YZ, VITA Zahnfabrik, Germany). Material and Methods: Thirty zirconia bars (20.0x4.0x1.0 mm) and six zirconia blocks (12.0x7.5x1.2 mm) were prepared and veneered with porcelain with different thickness: 1 mm, 2 mm, or 3 mm. The bars of each experimental group (n=10) were subjected to four-point flexural strength testing. In each ceramic block, a Vickers indentation was created under a load of 10 kgf for 10 seconds, for the propagation of cracks. Results: The results of flexural strength were evaluated by One-way ANOVA and Tukey's test, with a significance level of 5%. The factor "thickness of the porcelain" was statistically significant (p=0.001) and the l-mm group presented the highest values of flexural strength. The cracks were predominant among the bending specimens with 1 and 2 mm of porcelain, and catastrophic failures were found in 50% of 3-mm-thick porcelain. After the indentation of blocks, the most severe defects were observed in blocks with 3-mm-thick porcelain. Conclusion: The smallest (1 mm) thickness of porcelain on the zirconia infrastructure presented higher values of flexural strength. Better resistance to defect propagation was observed near the porcelain/ zirconia interface for all groups. Higher flexural strength was found for a thinner porcelain layer in a bilayered zirconia system. The damage caused by a Vickers indentation near and far the interface with the zirconia shows that the stress profiles are different.
Descritores: Zircônio/química
Cerâmica/química
Porcelana Dentária/química
-Valores de Referência
Propriedades de Superfície
Resistência à Tração
Fatores de Tempo
Teste de Materiais
Reprodutibilidade dos Testes
Análise de Variância
Maleabilidade
Microscopia Confocal
Falha de Restauração Dentária
Análise do Estresse Dentário
Testes de Dureza
Temperatura Alta
Tipo de Publ: Estudos de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-893215
Autor: Li, Rong; Zhou, Ying; Li, Yan; Guo, Liang; Zhang, Yifeng; Qi, Zhili.
Título: Effects of chromium picolinate supplementation on growth performance, small intestine morphology and antioxidant status in ducks under heat stress conditions / Efectos de la suplementación con picolinato de cromo en el rendimiento de crecimiento, morfología del intestino delgado y estado antioxidante en patos bajo condiciones de estrés calórico
Fonte: Int. j. morphol;36(1):226-234, Mar. 2018. tab.
Idioma: en.
Projeto: National Key Research and Development Program; . Technological Innovation of Huazhong Agricultural University; . State Key Laboratory of Animal Nutrition.
Resumo: SUMMARY: The experiment was conducted to evaluate the effects of dietary supplemental chromium (Cr) on growth performance, meat quality, intestinal morphology, mucosa Hsp70 mRNA expression and antioxidant status of ducks reared under heat stress conditions. All ducks were randomly divided into three treatment groups, respectively, control group (Control, 23 ± 2 °C), heat stress group (HS, 32 ±2 °C), Cr picolinate group (CrPic, 32 ± 2 °C, 0.2 mg Cr/kg). Feed and distilled-deionized water were available ad libitum for an experimental phase of 35 days. Samples were collected on the day 14, 21 and 35 to determine biological and hematological values. Results showed that heat stress or dietary supplemental Cr both didn't have distinct influence on growth performance (P>0.05), compared to controls. Ducks fed 0.2 mg Cr/kg diet had greater ultimate pH (pHu)(P<0.05) than HS group. At day 14, the ratio of villus height to crypt depth (V/C) in CrPic group significantly increased (P<0.05) than that of HS group in jejunum. Heat stress remarkably increased Hsp70 mRNA expression in jejunum compared with controls (P<0.05). While the expression of Hsp70 mRNA in CrPic group was significantly decreased compared with HS (P<0.05). At day 21, the V/C of ileum in CrPic group significantly increased compared with HS group (P<0.05). Serum SOD levels in CrPic group were significantly higher than those in HS group (P<0.05). At day 35, Hsp70 mRNA expression and serum T-SOD levels in CrPic group significantly increased compared with controls (P<0.05). T-AOC in HS group significantly decreased compared with controls (P<0.05). Results indicate that dietary Cr supplementation doesn't influence ducks' growth performance, but has a positive effect on meat quality, small intestine morphology, also regulates Hsp70 mRNA expression under heat stress conditions, and enhances the antioxidant status.

RESUMEN: Se evaluó los efectos del cromo (Cr) dietético suplementario sobre el rendimiento del crecimiento, la calidad de la carne, la morfología intestinal, la expresión del ARNm Hsp70 en la mucosa y el estado antioxidante de los patos criados bajo condiciones de estrés por calor. Todos los patos se dividieron aleatoriamente en tres grupos: grupo control (control, 23 ± 2 °C), grupo de estrés térmico (HS, 32 ± 2 °C) y grupo de picolinato de Cr (CrPic, 32 ± 2 °C, 0,2 mg Cr / kg). El alimento y el agua desionizada destilada estuvieron disponibles ad libitum durante la fase experimental de 35 días. Las muestras se recogieron los días 14, 21 y 35 para determinar los valores biológicos y hematológicos. Los resultados mostraron que el estrés térmico o la suplementación dietética de Cr no tuvieron una influencia distinta en el rendimiento del crecimiento (P> 0,05), en comparación con los controles. Los patos alimentados con 0,2 mg de Cr / kg de dieta tuvieron un mayor pH final (pHu) (P <0,05) que el grupo HS. En el día 14, la relación de la altura de las vellosidades a la profundidad de la cripta (V / C) en el grupo CrPic aumentó significativamente (P <0,05) en relación a la del grupo de HS en el yeyuno. El estrés por calor incrementó notablemente la expresión del ARNm de Hsp70 en el yeyuno en comparación con los controles (P <0,05). Mientras que la expresión del ARNm de Hsp70 en el grupo CrPic se redujo significativamente en comparación con HS (P <0,05). En el día 21, la relación V / C del íleon en el grupo CrPic aumentó significativamente en comparación con el grupo HS (p <0,05). Los niveles séricos de SOD en el grupo CrPic fueron significativamente más altos que los del grupo HS (P <0,05). En el día 35, la expresión de ARNm de Hsp70 y los niveles séricos de T-SOD en el grupo CrPic aumentaron significativamente en comparación con los controles (P <0,05). T-AOC en el grupo HS disminuyó significativamente en comparación con los controles (P <0,05). Los resultados indican que la suplementación dietética de Cr no influye en el rendimiento de crecimiento de los patos, pero tiene un efecto positivo en la calidad de la carne, en la morfología del intestino delgado, y también regula la expresión de ARNm de Hsp70 en condiciones de estrés calórico y mejora el estado antioxidante.
Descritores: Ácidos Picolínicos/administração & dosagem
Patos
Temperatura Alta
Intestino Delgado/efeitos dos fármacos
-Estresse Fisiológico
Proteínas de Choque Térmico HSP70
Suplementos Nutricionais
Intestino Delgado/crescimento & desenvolvimento
Antioxidantes
Limites: Animais
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-893213
Autor: Hernández-López, Juana R; Hernández-Rodríguez, Mónica; Rivas-Manzano, Patricia; Bückle-Ramirez, L. Fernando.
Título: Thermal effect of acute and chronic stress on hepatic and renal tissue of the pacific sardine, Sardinops sagax caeruleus (Jenyns, 1842) / Efecto del estrés térmico agudo y crónico sobre el tejido hepático y renal de la sardina del pacífico, Sardinops sagax caeruleus (Jenyns, 1842)
Fonte: Int. j. morphol;36(1):212-220, Mar. 2018. tab, graf.
Idioma: en.
Projeto: Center for Scientific Research and Higher Education of Ensenada.
Resumo: SUMMARY: In the thermal range of the Pacific waters, known for the geographical distribution of Sardinops sagax caeruleus(Jenyns, 1842) (Pacific sardine), could be exposed to a stressing temperature environment with dilated effect. This work examines the liver and kidney of sardines acclimated at different temperatures and exposed to the lethal temperature and critical thermal maximum trials. The liver and kidney tissues of Sardinops sagax caeruleus acclimated for 25 days at 19, 21, 23 and 25 °C were anatomically examined after exposure to acute heat stress (AHS) caused by increasing the water temperature at a rate of 1 °C per min, and the chronic heat stress (CHS) effect by abruptly exposure to constant water temperature different from that of acclimation (AT). We observed in fish exposed to AHS that the liver tissue had vacuolated or necrotic hepatocytes and infiltration of inflammatory blood cells (25 °C) and the kidney tissue showed degenerative changes in the glomeruli and renal tubules and increased melanomacrophage centers. The CHS effect in liver and renal tissues produced damage signs of pyknosis, apoptosis, necrotic areas, and an increase in melanomacrophage centers as well as outbreaks of bacterial infection. The results demonstrate that S. sagax caeruleus did not tolerate an abrupt thermal change of more than 4 °C, independently of the ATs, over 50 % died. The consequences of the experimental acute and chronic thermal stress were histopathological alterations of liver and kidney. It was expected that the chronic stress temperature could produce in fish conspicuous histological changes, and indeed it was the most deleterious.

RESUMEN: En el rango térmico de las aguas del Pacífico, conocido por la distribución geográfica de Sardinops sagax caeruleus (Jenyns, 1842) (sardina del Pacífico), esta especie podría estar expuesta a un ambiente de temperatura estresante con efecto dilatado. Este trabajo examina el hígado y el riñón de las sardinas aclimatadas a diferentes temperaturas y expuestas a la temperaturas letales y crítica máxima. Los tejidos hepático y renal de Sardinops sagax caeruleus aclimatadas durante 25 días a 19, 21, 23 y 25 °C se examinaron anatómicamente después de la exposición al estrés de calor agudo (AHS) causado por el aumento de la temperatura del agua a una velocidad de 1 °C por minuto, y el efecto de estrés de calor crónico (CHS) por la exposición brusca a una temperatura constante del agua diferente a la de la aclimatación (AT). Observamos en peces expuestos a AHS que el tejido hepático tenía hepatocitos vacuolados o necróticos y la infiltración de células sanguíneas (25 °C) y el tejido renal presentaba cambios degenerativos en los glomérulos y túbulos renales y aumento de centros de melanomacrófagos. El efecto CHS en los tejidos hepático y renal produjo signos de daño de picnosis, apoptosis, áreas necróticas y un aumento en los centros de melanomacrófagos, así como brotes de infección bacteriana. Los resultados demuestran que S. sagax caeruleus no toleró un cambio térmico abrupto de más de 4 °C, independientemente de las AT, más del 50 % murió. Las consecuencias del estrés térmico agudo y crónico experimental fueron las alteraciones histopatológicas del hígado y el riñón. Se esperaba que la temperatura de estrés crónica pudiera producir cambios histológicos conspicuos en los peces, y de hecho fue la más perjudicial.
Descritores: Estresse Fisiológico
Peixes
Temperatura Alta
Rim/patologia
Fígado/patologia
Limites: Animais
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-889157
Autor: Yang, Yunlong; Lin, Ershu; Huang, Shaobin.
Título: Complete genome sequence of the aerobically denitrifying thermophilic bacterium Chelatococcus daeguensis TAD1
Fonte: Braz. j. microbiol;48(4):615-616, Oct.-Dec. 2017. tab.
Idioma: en.
Projeto: National Natural Science Foundation of China; . Natural Science Foundation of Fujian Province.
Resumo: ABSTRACT Chelatococcus daeguensis TAD1 is a themophilic bacterium isolated from a biotrickling filter used to treat NOx in Ruiming Power Plant, located in Guangzhou, China, which shows an excellent aerobic denitrification activity at high temperature. The complete genome sequence of this strain was reported in the present study. Genes related to the aerobic denitrification were identified through whole genome analysis. This work will facilitate the mechanism of aerobic denitrification and provide evidence for its potential application in the nitrogen removal.
Descritores: Bactérias/isolamento & purificação
Genoma Bacteriano
-Centrais Elétricas
Bactérias/classificação
Bactérias/genética
Bactérias/metabolismo
China
Aerobiose
Desnitrificação
Temperatura Alta
Filtros Microporos/microbiologia
Nitrogênio/metabolismo
Responsável: BR1.1 - BIREME



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