Bearing
Mostrando 13-24 de 4962 artigos, teses e dissertações.
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13. Synthesis and Antioxidant and Antimicrobial Properties of β-Hydroxy Sulfides, Sulfoxides, and Sulfones Derived from Cardanol and Glycerol Derivatives
Natural and synthetic sulfur-bearing organic compounds have many applications in medicinal chemistry. This article reports the preparation of amphiphilic β-hydroxy sulfides, sulfoxides, and sulfones derived from cardanol and glycerol. Thiolysis of cardanol epoxide 3 with various thiols (4a-4j) in ethanol or water yielded the corresponding β-hydroxy sulfide
J. Braz. Chem. Soc.. Publicado em: 2020-12
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14. NO Photorelease from a Ruthenium Complex Assisted by Formation of a Supramolecular Dimer
This work presents the NO release from compound [Ru(biq)2(H2O)(NO)](PF6)3 (biq = 2,2’-biquinoline) with visible light irradiation (λirrad = 660 nm), assisted by the low-absorbing photosensitizer [Ru(biq)2Cl2]. The structure of both compounds were characterized by means of ESI-MS (electrospray ionization mass spectrometry). The NO+ stretching, ν(NO) = 199
J. Braz. Chem. Soc.. Publicado em: 2020-11
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15. Mineralogical characterization of copper lateritic ore from the Furnas deposit - Carajás, Brazil
Abstract Furnas is a small and not well-known copper sulfide deposit in the northern Carajás mineral province (Pará State, Brazil). Mineralogical and geochemical studies were performed on three weathered samples in order to verify the presence of copper in the lateritic minerals. According to these Cu-bearing minerals (malachite, e.g.), the weathered ore c
REM, Int. Eng. J.. Publicado em: 2020-09
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16. Investigation of MHC gamma block C4A and C4B polymorphisms in unrelated hematopoietic stem cell transplantation
ABSTRACT Background: Immunological life-threatening complications frequently occur in post-hematopoietic stem cell transplantation (HSCT), despite matching recipient and donor (R/D) pairs for classical human leukocyte antigens (HLA). Studies have shown that R/D non-HLA disparities within the major histocompatibility complex (MHC) are associated with adverse
Hematol., Transfus. Cell Ther.. Publicado em: 2020-09
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17. Bearing failure in bolted sleeve connections with circular hollow sections under compression
Abstract This article analyzes sleeve connections between circular hollow sections. This type of connection is composed of two tubes connected by bolts to an inner tube with a smaller diameter, and explores the efficiency, aesthetics and resistance of hollow sections subjected to tension and compression. In previous researches, sleeve connections with aligne
REM, Int. Eng. J.. Publicado em: 2020-06
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18. Potassium recovery from Brazilian glauconitic siltstone by hydrothermal treatments
Abstract Silicate rock Verdete, collected in the central region of Minas Gerais state (Brazil) and composed mostly of micas (glauconite and muscovite) and tectosilicates (K-feldspar and quartz), was hydrothermally treated with several reactants in order to release and recover potassium. The hydrothermal products were characterized by flame photometry, XRD, X
REM, Int. Eng. J.. Publicado em: 2020-06
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19. Quantification of bergenin, antioxidant activity and nitric oxide inhibition from bark, leaf and twig of Endopleura uchi
Phytochemical investigation of Endopleura uchi led to the isolation of a gallic acid derivate, known as bergenin (2) and friedelin (1), a pentacyclic triterpene. The present work also reports the bergenin quantification in different Endopleura uchi bark, twig and leaves extracts. Our findings showed the highest bergenin concentration in bark methanol extract
Quím. Nova. Publicado em: 2020-04
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20. A Conceptual Approach to the -ING Construction: Aspects of Radiality and Subjectification
Abstract: The -ING construction has a number of uses in the English language, and teaching it to speakers of other languages poses some challenges, as learners tend to interpret the construction as a verbal one, in the progressive aspect, which is only one part of the picture. Bearing this in mind, we have developed a corpus-based research into the form-mean
Ilha Desterro. Publicado em: 2020-04
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21. Interface entre Oferta de Vagas de Residência Médica, Demanda por Médicos Especialistas e Mercado de Trabalho
RESUMO A formação de médicos especialistas no Brasil vem sofrendo uma série de interferências ao longo do tempo, entre as quais a recomendação de pautar a oferta/ampliação de vagas de residência médica em necessidades regionais. Para direcionar a ampliação de vagas de residência de determinada região, foi realizado um diagnóstico da realidade
Rev. bras. educ. med.. Publicado em: 13/01/2020
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22. Cytotoxic Activity of Synthetic Chiral Amino Acid Derivatives
Cancer is a chronic degenerative disease considered one of the most important causes of death worldwide. In this context, a series of dual-protected amino acid derivatives was synthesized and evaluated as potential novel anticancer agents. The 40 derivatives were prepared in up to three reaction steps. The cytotoxic activities were screened in vitro against
J. Braz. Chem. Soc.. Publicado em: 2020-01
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23. Enhancing Antitumor Efficacy of Cisplatin Low Dose by EDTA in Ehrlich Ascetic Carcinoma Bearing Mice
Abstract In a recent study, the treatment of different human cancer cell lines in vitro with ethylene diamine tetra-acetic acid (EDTA) showed a promising anticancer activity which could be a novel promising approach for cancer treatment. The aim of this study is to address the ability of EDTA to enhance the antitumor efficacy of the low dose of cisplatin (Ci
Braz. arch. biol. technol.. Publicado em: 20/12/2019
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24. The traditional Chinese medicine formulation Ruanjian Sanjie Decoction regulates the tumor matrix and improves the anti-tumor efficacy of TP-PEG-LPs
The Ruanjian Sanjie Decoction (RSD) is a traditional Chinese medicine (TCM) formulation consisting of Spica Prunellae, Pseudobulbus Cremastrae Seu Pleiones, Concha Ostreae and Semen Coicis, and widely used as an adjuvant in anti-cancer therapy. The aim of this study was to determine the effects of RSD on the extracellular matrix (ECM) of tumors, and on the e
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019