Ph Process Control
Mostrando 13-24 de 203 artigos, teses e dissertações.
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13. Quality changes in reared, hot-smoked meagre (Argyrosomus regius Asso, 1801) during chill storage at 4 ± 1 °C
Abstract The aim of this study was to investigate quality and nutritional changes in reared meagre after the use of hot smoking technology. Hot smoking method was applied to the meagre and the resulting smoked fish were used to produce fillets, which were stored in refrigerator after being vacuum packed. As a result of chemical component analysis, it was se
Food Sci. Technol. Publicado em: 21/09/2018
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14. N2O-reducing activity of soil amended with organic and inorganic enrichments under flooded conditions
ABSTRACT Changes, apparent after investigation, in the physical and chemical properties in soil, as a result of organic and inorganic enrichments under flooded conditions, influence the growth of denitrifiers. The aim of this study was to determine the effect of the addition of manure (8 kg m−2) (M), clay (50 kg m−2) (CL) and lime (1.12 kg m−2) (Ca) on
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-08
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15. Reducing the leachability of nitrate, phosphorus and heavy metals from soil using waste material
Abstract Contaminants like nitrate (NO3), phosphorus (P) and heavy metals in water are often associated with agricultural activities. Various soil and water remediation techniques have been employed to reduce the risk associated with these contaminants. A study was conducted to examine the extent of leaching of heavy metals (Cd, Ni, Pb and Cr), NO3 and P. Fo
Braz. J. Chem. Eng.. Publicado em: 2017-07
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16. Salivary protein polymorphisms and risk of dental caries: a systematic review
Abstract Dental caries is an oral pathology associated with both lifestyle and genetic factors. The caries process can be influenced by salivary composition, which includes ions and proteins. Studies have described associations between salivary protein polymorphisms and dental caries experience, while others have shown no association with salivary proteins g
Braz. oral res.. Publicado em: 05/06/2017
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17. ANAEROBIC DIGESTION STABILITY TEST BY SHEWHART CONTROL CHART
ABSTRACT The anaerobic digestion (AD) operation complexity raise the importance of stability testing to verify whether the operating conditions are under control and whether the process is working as required. The current method of verifying process stability is by a range of the ratio between volatile fatty acidity and total alkalinity (VFA/ TA) within whic
Eng. Agríc.. Publicado em: 2017-06
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18. ROBUST CONTROL OF WIENER SYSTEMS: APPLICATION TO A pH NEUTRALIZATION PROCESS
Abstract In this paper, the robustness of a typical control scheme for Wiener systems is studied. These systems consist of the cascade connection of a linear time invariant system and a static nonlinearity. To control this kind of systems, several approaches were discussed in the literature. Most of these control schemes involve transformation of the measure
Braz. J. Chem. Eng.. Publicado em: 2016-03
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19. Low doses of gamma radiation in the management of postharvest
Lasiodiplodia theobromae in mangosThe postharvest life of mango is limited by the development of pathogens, especially fungi that cause rot, among which stands out the
Lasiodiplodia theobromae . Several control methods have been employed to minimize the damages caused by this fungus, chemical control can leave residues to man and nature; physical control by the use of gammBraz. J. Microbiol.. Publicado em: 21/07/2015
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20. BIOHYDROGEN FROM CHEESE WHEY TREATMENT IN AN AnSBBR: ACHIEVING PROCESS STABILITY
AbstractAn AnSBBR (anaerobic sequencing batch reactor containing biomass immobilized on an inert support) with liquid phase recirculation, containing a 3.5 L working volume, treated 1.5 L of cheese whey wastewater in 3 and 4 h cycles at 30 ºC to produce biohydrogen. From startup the bioreactor presented process instability. To overcome this problem the foll
Braz. J. Chem. Eng.. Publicado em: 2015-06
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21. Local linear model tree and Neuro-Fuzzy system for modelling and control of an experimental pH neutralization process
This paper describes the modelling and control of a pH neutralization process using a Local Linear Model Tree (LOLIMOT) and an adaptive neuro-fuzzy inference system (ANFIS). The Direct and Inverse model building using LOLIMOT and ANFIS structures is described and compared. The direct and inverse models of the pH system are identified based on experimental da
Braz. J. Chem. Eng.. Publicado em: 2014-06
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22. Eletrodo compósito à base de grafite-Araldite®: aplicações didáticas - parte II
This work proposes the use of a graphite-Araldite® 70% (graphite, m/m) composite electrode in didactic experiments, specifically in the quantitative determination of the neurotransmitter dopamine (DA) in a sample of pharmaceutical formulation. The goal is to demonstrate the possibility of using voltammetric techniques in quality control of medicines, beside
Quím. Nova. Publicado em: 2014-04
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23. Scale up of production in a bioreactor of a halotolerant protease from moderately halophilic Bacillus sp. isolated from soil
Studies were conducted on the production of protease by moderately halophilic Bacillus sp. on agro-industrial waste materials. The bacterium could efficiently use many agro wastes as substrates but wheat bran supported maximum enzyme production. To ascertain the performance of the process in shake flasks and lab scale bioreactor, experiments were conducted t
Braz. arch. biol. technol.. Publicado em: 18/03/2014
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24. Studies on the properties of cdS films deposited from pH-controlled growth solutions
In this work we have studied the properties of CdS films obtained by the chemical bath deposition technique. We studied the influence of pH control of the reaction solution on the structural and optical properties of chemically deposited CdS films. For this, we deposited two sets of CdS films on glass substrates using two different reaction solutions. The ma
Mat. Res.. Publicado em: 02/07/2013