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Mostrando 1-12 de 1338 artigos, teses e dissertações.
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1. Study on the mechanisms of Suaeda rigida polysaccharides on the heart inhibition and skeletal muscle promotion in the frog
RESUMO Os objetivos deste estudo foram investigar os efeitos de diferentes concentrações de Suaeda rigida polissacarídeos (SRPs) sobre as características fisiológicas do coração de rã e do músculo gastrocnêmio, comparar suas semelhanças e diferenças, e analisar os mecanismos. CaCl2 e acetilcolina (Ach) foram selecionados respectivamente para sere
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2022
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2. Water pH and hardness alter ATPases and oxidative stress in the gills and kidney of pacu ( Piaractus mesopotamicus )
RESUMO Este estudo objetivou analisar o efeito de baixa e alta dureza da água em interação com diferentes pH da água em pacu (Piaractus mesopotamicus). Juvenis de pacu foram submetidos a baixa (50 mg CaCO3 L-1 - BDA) ou alta dureza da água (120 mg CaCO3 L-1 - ADA) em pH da água de 5.5 ácido), 7.5 (circum-neutro) ou 9.0 (alcalino) por 15 dias. Foram co
Neotrop. ichthyol.. Publicado em: 25/11/2019
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3. Antibacterial Activity of Polygonum Orientale Extracts Against Clavibacter Michiganensis subsp. michiganensis, the Agent of Bacterial Canker of Tomato Disease
Abstract Clavibacter michiganensis subsp. michiganensis (Cmm), which is a Gram positive bacterium, causes the bacterial canker of tomato disease. The purpose of the study was to evaluate the antibacterial activity of Polygonum orientale extracts against Cmm. In this study, firstly, effects of three extracting parameters (extractive time, extractive temperat
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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4. Low dissolved oxygen levels increase stress in piava (Megaleporinus obtusidens): iono-regulatory, metabolic and oxidative responses
Abstract: The aquatic environment presents daily and/or seasonal variations in dissolved oxygen (DO) levels. Piava faces different DO levels in the water due to its distributional characteristics. The goal of this study was to describe the effects of low DO levels on plasma ion, biochemical and oxidative variables in piava juveniles. Fish were exposed to dif
An. Acad. Bras. Ciênc.. Publicado em: 19/08/2019
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5. Assessment of neuropharmacological potential of low molecular weight components extracted from Rhinella schneideri toad poison
Abstract Background: Studies on toad poison are relevant since they are considered a good source of toxins that act on different biological systems. Among the molecules found in the toad poison, it can be highlighted the cardiotonic heterosides, which have a known mechanism that inhibit Na+/K+-ATPase enzyme. However, these poisons have many other molecules
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 18/04/2019
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6. Manipulação do crescimento do peixe amazônico tambaqui, Colossoma macropomum (Characiformes: Serrasalmidae): análises fisiológicas e zootécnicas
RESUMO O tambaqui, Colossoma macropomum, é o peixe nativo mais cultivado no Brasil. No entanto, avanços tecnológicos são necessários para incrementar as taxas de produção. Fatores de crescimento moduladores, como o hormônio do crescimento, podem estar associados a uma melhoria na taxa de crescimento e eficiência alimentar. O uso de hormônio exógen
Acta Amaz.. Publicado em: 2018-09
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7. Inibidores da bomba de prótons e sua relação com a doença renal
RESUMO Os Inibidores da Bomba de Prótons (IBPs) são medicamentos que inibem a enzima H+/K+-ATPase no estômago, diminuindo a secreção gástrica. Esses medicamentos podem desencadear nefrite intersticial aguda, evento adverso potencialmente grave e que pode cursar com lesão renal aguda. Além disso, pesquisadores têm observado que o uso prolongado de IB
J. Bras. Nefrol.. Publicado em: 10/07/2018
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8. Importance of SERCA2a on early isolated diastolic dysfunction induced by supravalvular aortic stenosis in rats
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart failure, but none evaluate it's the role in early isolate
Braz J Med Biol Res. Publicado em: 13/04/2017
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9. Thyroxine increases Serca2 and Ryr2 gene expression in heart failure rats with euthyroid sick syndrome
ABSTRACT Objective The current study was aimed at analyzing sarcoplasmic reticulum Ca2+ ATPase (Serca2) and ryanodine receptor type 2 (Ryr2) gene expression in rats subjected to surgery that induced HF and were subsequently treated with T4 using physiological doses. Materials and methods HF was induced in 18 male Wistar rats by clipping the ascending tho
Arch. Endocrinol. Metab.. Publicado em: 10/10/2016
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10. Uliginosin B, a natural phloroglucinol derivative with antidepressant-like activity, increases Na+,K+-ATPase activity in mice cerebral cortex
ABSTRACT Uliginosin B, a phloroglucinol isolated from Hypericum polyanthemum Klotzsch ex Reichardt, Hypericaceae, has antidepressant-like effect in the forced swimming test in rodents and inhibits monoamines neuronal reuptake without binding to their neuronal carriers. Studies showed the involvement of Na+,K+-ATPase brain activity in depressive disorders, as
Rev. bras. farmacogn.. Publicado em: 2016-10
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11. Plant proton pumps as markers of biostimulant action
ABSTRACT A standard protocol to evaluate the effects of biostimulants on plant physiology is still lacking. The proton pumps present in the vacuolar and plasma membranes are the primary agents responsible for the regulation of the electrochemical gradient that energizes the nutrient uptake system and acid growth mechanism of plant cells. In this study, two o
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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12. Rhamdia quelen (Quoy & Gaimard, 1824), submitted to a stressful condition: effect of dietary addition of the essential oil of Lippia alba on metabolism, osmoregulation and endocrinology
RESUMO O objetivo deste estudo foi avaliar o efeito do óleo essencial de Lippiaalba (OELA) como aditivo em rações na ionoregulação, parâmetros metabólicos e expressão de hormônios hipofisários em jundiás, Rhamdiaquelen, submetidos a uma situação estressante (densidade de estocagem de 10,6 kg m-3 e espaço limitado). Os peixes foram alimentados c
Neotrop. ichthyol.. Publicado em: 2015-12