Turning
Mostrando 1-12 de 718 artigos, teses e dissertações.
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1. Analysis of Al2O3-ZrO2 ceramic insert in turning process of Ti-6Al-4V alloy using grey Taguchi-based response surface methodology (GT-RSM)
Abstract The present investigation aimed at a sustainable green turning operation of Ti-6Al-4V alloy using multi-objective optimization of surface roughness, tool flank wear, material removal rate, and tool wear loss with cutting speed, feed rate, and depth of cut as input parameters. The experiments were performed on a CNC lathe machine using an alumina-zir
Cerâmica. Publicado em: 2022
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2. NOVOS PARADIGMAS ECOTEOLÓGICOS EM TEMPOS DE RISCO: CIÊNCIA E ECOLOGIA EM DIÁLOGO COM A TEOLOGIA
RESUMO Este estudo identifica uma série de questões epistemológicas e fenomenológicas que convocam a ecologia e a teologia e que têm a ver com as experiências sistémicas de falência, desintegração e desmoronamento da vida quotidiana e da própria sobrevivência da vida no planeta terra, no século XXI. Procura discernir novos paradigmas com valor h
Perspectiva Teológica. Publicado em: 2022
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3. DESIGN AND EXPERIMENT OF SELF-PROPELLED SYSTEM FOR PADDY FIELD WEEDER BASED ON THE INTERACTION MECHANISM OF WHEEL-SOIL
ABSTRACT Aiming at the low mechanization of paddy field weeding and lack of dedicated agricultural machinery for paddy field weeding in China, a self-propelled system of paddy field weeding machine was designed. The overall structure and working principle of self-propelled system were illustrated and analyzed. The interaction mechanism of wheel-soil during w
Engenharia Agrícola. Publicado em: 2022
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4. Fundamental bioflotation aspects of hematite using an extracted Rhodococcus opacus by-product
Abstract The aim of this study is to assess the floatability of hematite using a crude biosurfactant (BS) extracted from Rhodococcus opacus. Throughout high-pressure ethanol extraction, unrefined surfactant was extracted from the bacteria with a yield of 0.3 g/L. An FTIR analysis on this extract, shows the presence of alcohol (–OH) and ketone (C=O) groups,
REM, Int. Eng. J.. Publicado em: 2021-09
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5. OPTIMIZATION OF BREWING WASTE’S (TRUB) PHENOLIC COMPOUNDS EXTRACTION BY ULTRASOUND ASSISTED USING RESPONSE SURFACE METHODOLOGY
The brewing waste, also known as trub, is an abundant by-product of the brewing industry. Such material presents high levels of phenolic compounds, which promote antioxidant, antimicrobial and antifungal effects, turning the trub economically attractive. In this study, the trub’s phenolic compounds were extracted by ultrasound-assisted extraction technolog
Quím. Nova. Publicado em: 2021-04
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6. MÉTODO DE TRIAGEM DE MICROGININAS EM CIANOBACTÉRIAS POR LC-MS/MS
Cyanobacteria produce a wide variety of bioactive compounds, making them a highly promising group in the search for novel molecules with pharmacological and biotechnological properties. Among these, microginins attract attention for being peptides which inhibit angiotensin-converting enzyme, turning them into potential targets for hypertension and congestive
Quím. Nova. Publicado em: 2020-12
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7. COMPOSTING PROCESS IN THE PRODUCTION OF LETTUCE SEEDLING SUBSTRATES: EFFECT OF COVERING AND TURNING FREQUENCY
ABSTRACT The composting of waste from a broiler chicken production chain (BCPC) promotes the mitigation of environmental impacts and allows the commercialization of compost as an agricultural input. Both the characteristics and the potential for use of the final compost depends on the operational conditions during composting. The objective of this study was
Eng. Agríc.. Publicado em: 2020-10
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8. Conservation of species-rich subtropical grasslands: traditional management vs. legal conservation requirements in primary and secondary grasslands
ABSTRACT Land-use change is the main cause of biodiversity losses, and for grasslands includes changes in management. The last 10 years has seen afforestation of traditionally grazed grasslands increase considerably in the understudied Serra do Sudeste region of the Brazilian Pampa, turning the region into a mosaic of tree plantations, natural ecosystems (pa
Acta Bot. Bras.. Publicado em: 2020-06
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9. Biochemistry and Renal Function: Use of Inquiry-Based Teaching Sequences for Retrieval of Specific Concepts
RESUMO As propostas de ensino atuais envolvem estratégias de ensino que auxiliam e incentivam a construção do conhecimento, fazendo com que o aluno seja um participante ativo do processo de aprendizagem, e têm sido alvo de diversas pesquisas. Este artigo relata, aula a aula, uma sequência didática realizada com alunos em fase inicial de formação, apl
Rev. bras. educ. med.. Publicado em: 13/01/2020
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10. Dois críticos, uma semana, um século
RESUMO Não é comum, em lugar algum,que dois críticos literários surjam entreos melhores explicadores de uma naçãopor quase um século. Partindo da análiseschwarziana do método crítico de AntonioCandido, o ensaio explora as relações deafinidade e de diferenciação dos dois críticosliterários confrontados em dois momentosdecisivos: o modernismo e
Rev. Inst. Estud. Bras.. Publicado em: 10/01/2020
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11. DAS JORNADAS DE JUNHO À CRUZADA MORAL: O PAPEL DAS REDES SOCIAIS NA POLARIZAÇÃO POLÍTICA BRASILEIRA
Resumo O objetivo deste texto é compreender o papel desempenhado pelas redes sociais na polarização política. Na perspectiva da moldagem social da tecnologia, desenvolve uma análise sociológica e histórica das características da sociabilidade por meio de plataformas num contexto de uso individualizado de dispositivos de conexão. Os protestos de 2013
Sociol. Antropol.. Publicado em: 20/12/2019
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12. La mirada perdida: los libros del escritor invidente Gábor Molnár sobre la Región Amazónica
ABSTRACT One of the people with a marked influence on the image of Amazonia, and in general, on the image of Brazil in Hungary in the second half of the 20th century was Gábor Molnár, foreman by profession and member of a failed amateur expedition to Brazil in 1930. He lived, worked, hunted and made animal collections in the Amazonian Region between 1930 a
Rev. Bras. Hist.. Publicado em: 09/12/2019