Calcium Sulfate
Mostrando 1-12 de 236 artigos, teses e dissertações.
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1. Influence of bottom ash and red mud additions on self-leveling underlayment properties
Abstract Self-levelling underlayments (SLUs) based on Portland cement (PC) are susceptible to cracking due to drying shrinkage. The present study evaluated the influence of binder contents on systems consisting of calcium aluminate cement (CAC), PC, and a source of calcium sulfate (C$), derived from the flue gas desulfurization process (FGD), on the mechanic
Cerâmica. Publicado em: 2022
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2. Screening, diagnosis and management of hypothyroidism in pregnancy: Number 10 – October 2022
Key points Pregnancy places a metabolic overload on the maternal thyroid, especially in the first trimester, mainly because of the demand imposed by the conceptus. The fetal thyroid becomes functionally mature only around pregnancy week 20. Until then, the fetus depends on the transfer of maternal thyroid hormones (THs). Thyroid hormones are essential for
Revista Brasileira de Ginecologia e Obstetrícia. Publicado em: 2022
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3. Ternary system Portland cement-calcium aluminate cement-calcium sulfate applied to self-leveling mortar: a literature review
Abstract The modernization of building systems is increasingly demanding products that improve efficiency during their processing. The development of self-leveling mortars for the regularization of flooring is a consequence of this evolution. The high contents of binder and water to obtain self-flowing property, plus the application of thin layers over large
Cerâmica. Publicado em: 2021-03
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4. Evaluating the discriminatory power of a dissolution assay for rosuvastatin calcium capsules: Solid-state properties and dissolution media
We propose to evaluate the dissolution properties of rosuvastatin calcium (ROSC) capsules in different media to characterize the discriminatory power of the assay method. Dissolution assays were performed in media with different pH, and including the surfactant sodium dodecyl sulfate (SDS). Several immediate-release formulations were manufactured using the c
Braz. J. Pharm. Sci.. Publicado em: 23/09/2019
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5. Elemental Concentration and Sulfur Chemical Speciation in the Amazonian Plant Andira surinamensis Using Synchrotron Radiation Techniques (SR-XRF, XANES), RBS and WD-XRF
The inorganic composition of the bark and leaf of a plant from the Amazon rainforest, Andira surinamensis, was determined using two non-destructive, multi-element techniques: X-ray fluorescence (XRF) and Rutherford backscattering spectrometry (RBS). XRF measurements were made using both a conventional X-ray source and synchrotron radiation. It was observed t
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
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6. Physiological quality of Urochloa brizantha seeds submitted to priming with calcium salts
RESUMO O condicionamento fisiológico proporciona vários benefícios, como melhoria no vigor das sementes e redução no grau de dormência. Em sementes de Urochloa brizantha, geralmente, se utiliza nitrato de potássio (KNO3), que é de difícil aquisição. Nesse sentido, os sais de cálcio se destacam, mas é necessário verificar se proporcionam os mesm
Pesqui. Agropecu. Trop.. Publicado em: 15/08/2019
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7. Gestão da água em usina de concreto: análise do emprego de Moringa oleifera no tratamento de água residuária e proposta de reusoapós tratamento
RESUMO O setor da construção civil, um dos maiores consumidores de matérias-primas e recursos hídricos, vem mostrando sinais rumo à uma produção sustentável. Nesse seguimento, a gestão e reuso de águas residuárias nas centrais dosadoras de concreto corroboraria para diminuição dos efeitos negativos da área com o meio ambiente. No entanto, para
Matéria (Rio J.). Publicado em: 10/06/2019
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8. Impact of Nitrate and Ammonium ratio on Nutrition and Growth of two Epiphytic Orchids
Abstract Phalaenopsis and Dendrobium do not grow and flower well with 100% ammonium (NH4-N); and there are detailed studies on the effects of nitrate (NO3-N) and ammonium ratios on the flowering, but no information about accumulation of other nutrients and the effects of ammonium toxicity on orchids. For this reason, two experiments were carried out with orc
An. Acad. Bras. Ciênc.. Publicado em: 18/10/2018
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9. A comparison of different bone graft materials in peri-implant guided bone regeneration
Abstract The aim of this study was to compare the effects of hydroxyapatite (HA), deproteinized bovine bone (DPB), human-derived allogenic bone (HALG), and calcium sulfate (CAP) graft biomaterials used with titanium barriers for bone augmentation to treat peri-implant defects in rat calvarium treated by guided bone regeneration (GBR). Thirty-two female Sprag
Braz. oral res.. Publicado em: 10/07/2018
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10. Botanical and genetic characters of Erythrina × neillii cultivated in Egypt
Abstract Erythrina × neillii Mabberley & Lorence, Fabaceae, is a sterile hybrid between E. herbacea L. and E. humeana Spreng. Nothing was traced about its genetic, macro and micromorphology. Therefore, it was deemed of interest to study its botanical characters, in addition to the DNA fingerprint to help in the identification of the plant. The anatomical ch
Rev. bras. farmacogn.. Publicado em: 2017-06
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11. Nitrogen fertilization in top dressing for wheat crop in succession to soybean under a no-till system
ABSTRACT Agricultural intensification to improve wheat yield has increased the demand for nitrogen fertilizers. This study aimed to investigate the wheat response in succession to soybean due to application of nitrogen rates and sources in top dressing, as well as to determine the N rates of maximum technical yield (MTY) and maximum economic yield (MEY). A f
Bragantia. Publicado em: 15/05/2017
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12. Structural Characterization of Calcium Sulfate Bone Graft Substitute Cements
The aim of this work was to study the structural characteristics of commercially available bone graft substitute (BGS) ceramic cements. In particular, the microstructure of two calcium sulfate cements was investigated. For this purpose, nitrogen and mercury porosimetry, x-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements have been car
Mat. Res.. Publicado em: 22/08/2016