Purification Process
Mostrando 1-12 de 395 artigos, teses e dissertações.
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1. Optimizing the recovery of peripheral blood mononuclear cells trapped in leukoreduction filters - A comparison study
Abstract Introduction The isolation of captured peripheral blood mononuclear cells (PBMNCs) from leukoreduction filters (LRFs) can be of great importance in terms of bringing the lost cells back into use. Objective The aim of this study was to evaluate various methods based on their potential to recover the peripheral blood cells from LRFs with a focus on
Hematology, Transfusion and Cell Therapy. Publicado em: 2022
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2. Purification of raw palygorskite: a comparative study involving different processes and dispersing agents
Abstract Palygorskite (Pal) is a natural clay mineral with fibrous morphology and high surface area. Depending on the geological origin, it presents impurities, such as quartz and carbonates, which can harm some of its properties. Therefore, this work seeks to define a viable methodology for the purification of a Brazilian Pal. Two types of mixing processes
Cerâmica. Publicado em: 2021-06
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3. CHLORDECONE ADSORPTION ON FUNCTIONALIZED ACTIVATED CARBONS: COMPUTATIONAL CHEMISTRY AS A TOOL FOR UNDERSTANDING THE ADSORPTION PROCESS
Chlordecone (CLD) has been used as a pesticide for a long time to control the proliferation of various insects in tropical countries like the French West Indies. CLD was included in 2009 in the list of persistent organic pollutants (POPs) by the Stockholm Convention, prohibiting its production and use worldwide. Thus, its removal from water and soils is a sa
Quím. Nova. Publicado em: 2021-02
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4. AN APPROACH BASED ON ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY TO STUDY THE GLYCEROL/BIODIESEL GRAVITY SEPARATION
In this study, electrochemical impedance spectroscopy (EIS) is evaluated as a novel application in the biodiesel purification process. EIS is proposed as a tool to study the behavior of charge carriers produced from side reactions or dissociations of some impurities during the gravitational separation of glycerol dispersed in crude biodiesel after the transe
Quím. Nova. Publicado em: 2020-12
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5. Regenerated Cellulose Membrane from Peanut Shell for Biodiesel Purification
Biodiesel purification by water washing has been proved to be an unattractive process from an economic and environmental point of view. In this work, we propose the use of regenerated cellulose membranes from peanut shell as an alternative in the biodiesel purification. The preparation of the membranes was optimized from a central composite design, resulting
J. Braz. Chem. Soc.. Publicado em: 2020-05
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6. COMPARISON OF ARROWROOT (Maranta arundinacea) AND CASSAVA STARCH EXTRACTION IN SEPARATION, CONCENTRATION, AND PURIFICATION USING A ROTATING SIEVE UNDER WATER
ABSTRACT Brazil is home to several plant species that exhibit potential for starch extraction. The arrowroot plant stands out owing to its South American origin. Arrowroot starch is especially important for fine confectionery, which is a high-value niche market. Thus, a small producer could benefit from the high prices of arrowroot starch. However, to have c
Eng. Agríc.. Publicado em: 2020-02
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7. CATALYST PREPARATION METHODS TO REDUCE CONTAMINANTS IN A HIGH-YIELD PURIFICATION PROCESS OF MULTIWALLED CARBON NANOTUBES
Abstract CoMo/MgO catalysts with low loading of cobalt and molybdenum were prepared by incipient wetness impregnation and the sol-gel method for high yield production of carbon nanotubes (CNT). A detailed characterization of the catalysts, as-produced CNT and purified CNT, indicated a relationship between carbon nanotube properties, synthesis and purificatio
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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8. OPTIMIZATION OF PRESSURE-SWING DISTILLATION FOR ANHYDROUS ETHANOL PURIFICATION BY THE SIMULATED ANNEALING ALGORITHM
ABSTRACT The present study addresses the novel application of the simulated annealing algorithm (SAA) to optimize the pressure-swing distillation (PSD) process for anhydrous ethanol purification. Three different softwares (Aspen Plus®, Excel® and Matlab®) were integrated to simultaneously optimize seven design and operational variables. The configuration
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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9. Optimization of extraction process for efficient imino acids recovery and purification from low-value sea cucumber
Abstract For high recoveries and purities of L-proline (L-Pro) and L-hydroxyproline (L-Hyp) from the low-value sea cucumber Acaudina leucoprocta, the extraction process was systematically investigated and optimized. The results indicated that, in decoloration of A. leucoprocta hydrolysate, activated carbon powdered W660 was more suitable due to the low addit
Food Sci. Technol. Publicado em: 06/06/2019
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10. Produção e purificação integrada de protease fibrinolítica de Mucor subtilissimus UCP 1262
RESUMO As enzimas fibrinolíticas podem ser obtidas de micro-organismos por meio de processos fermentativos. O presente trabalho teve como objetivo avaliar a produção e extração integrada da protease fibrinolítica de Mucor subtilissimus UCP 1262 usando sistema de duas fases aquosas (SDFA). O processo integrado foi realizado para avaliar a produção, pa
Arq. Bras. Med. Vet. Zootec.. Publicado em: 06/06/2019
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11. Purification and characterization of angiotensin converting enzyme-inhibitory derived from crocodile blood hydrolysates
Abstract Various enzyme types were used to hydrolyze crocodile blood peptides showing an Angiotensin I-converting enzyme (ACE) inhibitory activity. Alcalase hydrolysates (ALH) and Protease G6 hydrolysates (PG6H) showed the highest degree of hydrolysis (P<0.05). However, PG6H was significantly observed to have an effective ACE-inhibitory (ACE-I) activity (94.
Food Sci. Technol. Publicado em: 09/05/2019
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12. Extraction and purification of astaxanthin from shrimp shells and the effects of different treatments on its content
Abstract In this study, the extraction process and purification technology of astaxanthin from shrimp shells were established, and the effects of different treatments on the content of astaxanthin were studied. The determination results of astaxanthin in various shrimp/crab shells showed that the astaxanthin content in the Procambarus clarkia shell reached 2
Rev. bras. farmacogn.. Publicado em: 2019-02