Reduction Of Molecular Weight
Mostrando 1-12 de 433 artigos, teses e dissertações.
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1. Prior exercise training and experimental myocardial infarction: A systematic review and meta-analysis
Exercising prior to experimental infarction may have beneficial effects on the heart. The objective of this study was to analyze studies on animals that had exercised prior to myocardial infarction and to examine any benefits through a systematic review and meta-analysis. The databases MEDLINE, Google Scholar, and Cochrane were consulted. We analyzed article
Clinics. Publicado em: 20/01/2020
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2. Retraction notice for: “Risk factors for early-onset ventilator-associated pneumonia in aneurysmal subarachnoid hemorrhage patients” [Braz J Med Biol Res (2018) 51(7): e6830]
Due to its various structures in bio-compounds, snake venom is the indisputable result of evolutionary stages of molecules with an increasingly complex structure, high specificity, and of great importance for medicine because of their potential. The present study proposed an underpinning examination of venom composition from nine species of venomous snakes u
Braz J Med Biol Res. Publicado em: 2020-01
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3. Protein structure of the venom in nine species of snake: from bio-compounds to possible healing agents
Due to its various structures in bio-compounds, snake venom is the indisputable result of evolutionary stages of molecules with an increasingly complex structure, high specificity, and of great importance for medicine because of their potential. The present study proposed an underpinning examination of venom composition from nine species of venomous snakes u
Braz J Med Biol Res. Publicado em: 2020-01
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4. Effects of the hyaluronic acid infiltration in the treatment of internal temporomandibular joint disorders
RESUMO JUSTIFICATIVA E OBJETIVOS: O protocolo primário de controle das disfunções temporomandibulares prioriza as medidas reversíveis e menos invasivas. Entretanto, o tratamento conservador mostra-se, algumas vezes, ineficaz, e como alternativa terapêutica, tem sido sugerido o uso de ácido hialurônico para com isso, verificar a sua efetividade em pac
BrJP. Publicado em: 19/06/2019
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5. Mathematical modeling of the batch adsorption of proteins on new restricted access media with poly(ethylene glycol) as a semi-permeable barrier using compact finite differences
Abstract In this work we describe a mathematical analysis of the batch adsorption process of several proteins using a new restricted access medium consisting of agarose beads grafted with poly(ethylene glycol) (PEG) as a semi-permeable barrier and immobilized metal ions or ion exchange groups as binding sites. The model was fitted to experimental data, allow
Braz. J. Chem. Eng.. Publicado em: 2018-01
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6. Production and characterization of a biosurfactant produced by Streptomyces sp. DPUA 1559 isolated from lichens of the Amazon region
Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of
Braz J Med Biol Res. Publicado em: 11/12/2017
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7. Thermal and Mechanical Properties of Vinyltrimethoxysilane (VTMOS) Crosslinked High Molecular Weight Polyethylene (HMWPE)
The use of polyethylene in sliding systems for automotive industry requires adequate mechanical properties, such as high wear resistance, besides good processing properties in conventional extrusion processes. Aiming to fulfill these requirements, crosslinks were introduced in a high molecular weight polyethylene (HMWPE) grade through a process involving gra
Mat. Res.. Publicado em: 27/07/2017
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8. Effect of shrimp shells milling on the molar mass of chitosan
Abstract Shrimp shells are a raw material rich in chitin, a precursor of chitosan biopolymer. The variables of processing (demineralization, deproteination and deacetylation) can be manipulated to determine the main characteristics of chitosan, the degree of deacetylation (DD), and average molar mass. This study evaluated the influence of one of the unit ope
Polímeros. Publicado em: 2017-03
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9. Photodegradation of UHMWPE Filled with Iron Ore Fine
Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application and the use of fillers may be a suitable way to overcome this. The fillers can influence the photo stabilizat
Mat. Res.. Publicado em: 23/01/2017
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10. THE EFFECT OF SURFACTANT AND HIGH MOLECULAR WEIGHT POLYMER ADDITION ON PRESSURE DROP REDUCTION IN PIPE FLOW
Abstract The main aim of this paper is to present a possibility to enhance the drag reduction effect in straight pipe flow by the simultaneous addition to the transported liquid of a small amount of high molecular weight polymers and surfactants. Qualitative analysis of the polymer-micellar additive influence on the shape and character of flow resistance cur
Braz. J. Chem. Eng.. Publicado em: 2016-12
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11. Preparation and Characterization of Maleic Anhydride Grafted Poly(Hydroxybutirate-CO-Hydroxyvalerate) – PHBV-g-MA
A compatibilizer agent was successfully produced by grafting maleic anhydride (MA) to poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) chains on a reactive processing by mechanical mixing, using a mixture of PHBV, MA and dicumyl peroxide (DCP) as initiator. The resulting PHBV grafted MA (PHBV-g-MA) was characterized by Fourier transform infrared (FTIR) spectr
Mat. Res.. Publicado em: 12/02/2016
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12. Biobased additive plasticizing Polylactic acid (PLA)
Polylactic acid (PLA) is an attractive candidate for replacing petrochemical polymers because it is from renewable resources. In this study, a specific PLA 2002D was melt-mixed with two plasticizers: triethyl citrate (TEC) and acetyl tributyl citrate (ATBC). The plasticized PLA with various concentrations were analyzed by differential scanning calorimetry (D
Polímeros. Publicado em: 2015-12