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Article: FT-NIR spectroscopy analysis for monitoring the microbial production of 2-phenylethanol using crude glycerol as carbon source

Quintelas, C. / Braga, A. / Cordeiro, A. / Ferreira, E.C. / Belo, I. / Páscoa, R.N.M.J.

Lebensmittel-Wissenschaft + [i.e. und] Technologie. 2022 Feb. 01, v. 155

2022

Abstract: The valorization of glycerol wastes through its conversion into high-added value products using biotechnological processes is very promising due to the high amount of glycerol generated from the bio-diesel industry. In this sense, it is important to ... ...

Abstract	The valorization of glycerol wastes through its conversion into high-added value products using biotechnological processes is very promising due to the high amount of glycerol generated from the bio-diesel industry. In this sense, it is important to develop rapid, reliable and, if possible, environmentally friendly analytical techniques for the monitoring of high-added value compounds. With this in mind, Fourier transform near infrared (FT-NIR) spectroscopy was explored for the assessment of biomass, glycerol, l-phenylalanine and 2-phenylethanol (2-PE) parameters during the biotechnological production of 2-PE. A total of 80 samples were collected and analyzed through FT-NIR spectroscopy. Partial least squares (PLS) regression method was selected for establishing quantification models. The obtained figures of merit, in terms of, coefficients of determination of prediction (R²P), range error-ratios (RER) and residual predictive deviation (RPD) yielded values higher than 0.85, 7.7 and 2.6, respectively, for all the parameters assessed. The obtained results reveal that all the developed PLS models can be considered as models with a good predictive accuracy and therefore attest the suitability of FT-NIR spectroscopy for the quantification of these parameters. Concluding, a new rapid, reliable, cost-effective, accurate, multi-parametric and environmentally friendly analytical technique exploring the potential of FT-NIR spectroscopy was successfully developed.
Keywords	biodiesel ; biomass ; carbon ; cost effectiveness ; glycerol ; industry ; phenylalanine ; phenylethyl alcohol ; prediction
Language	English
Dates of publication	2022-0201
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	241369-3
ISSN	0460-1173 ; 0023-6438
ISSN	0460-1173 ; 0023-6438
DOI	10.1016/j.lwt.2021.112951
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Environmentally-friendly technology for rapid identification and quantification of emerging pollutants from wastewater using infrared spectroscopy.

Quintelas, C / Melo, A / Costa, M / Mesquita, D P / Ferreira, E C / Amaral, A L

Environmental toxicology and pharmacology

2020 Volume 80, Page(s) 103458

Abstract: The monitoring of emerging pollutants in wastewaters is nowadays an issue of special concern, with the classical quantification methods being time and reagent consuming. In this sense, a FTIR transmission spectroscopy based chemometric methodology was ... ...

Abstract	The monitoring of emerging pollutants in wastewaters is nowadays an issue of special concern, with the classical quantification methods being time and reagent consuming. In this sense, a FTIR transmission spectroscopy based chemometric methodology was developed for the determination of eight of these pollutants. A total of 456 samples were, therefore, obtained, from an activated sludge wastewater treatment process spiked with the studied pollutants, and analysed in the range of 200 cm
MeSH term(s)	Environmental Monitoring/instrumentation ; Environmental Monitoring/methods ; Least-Squares Analysis ; Models, Theoretical ; Spectroscopy, Fourier Transform Infrared/methods ; Waste Water/chemistry ; Water Pollutants, Chemical/analysis
Chemical Substances	Waste Water ; Water Pollutants, Chemical
Language	English
Publishing date	2020-07-22
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1318302-3
ISSN	1872-7077 ; 1382-6689
ISSN (online)	1872-7077
ISSN	1382-6689
DOI	10.1016/j.etap.2020.103458
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Article ; Online: Quantification of pharmaceutical compounds in wastewater samples by near infrared spectroscopy (NIR).

Quintelas, C / Mesquita, D P / Ferreira, E C / Amaral, A L

Talanta

2018 Volume 194, Page(s) 507–513

Abstract: The quantification of pollutants, as pharmaceuticals, in wastewater is an issue of special concern. Usually, typical methods to quantify these products are time and reagent consuming. This paper describes the development and validation of a Fourier ... ...

Abstract	The quantification of pollutants, as pharmaceuticals, in wastewater is an issue of special concern. Usually, typical methods to quantify these products are time and reagent consuming. This paper describes the development and validation of a Fourier transform near-infrared (FT-NIR) spectroscopy methodology for the quantification of pharmaceuticals in wastewaters. For this purpose, 276 samples obtained from an activated sludge wastewater treatment process were analysed in the range of 200 cm
MeSH term(s)	Limit of Detection ; Pharmaceutical Preparations/analysis ; Spectroscopy, Near-Infrared/methods ; Waste Water/chemistry ; Water Pollutants, Chemical/analysis
Chemical Substances	Pharmaceutical Preparations ; Waste Water ; Water Pollutants, Chemical
Language	English
Publishing date	2018-10-24
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/j.talanta.2018.10.076
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Article: Definition of no‐fishing zones and fishing effort limits to reduce franciscana bycatch to sustainable levels in southern Brazil

Prado, J. H. / Kinas, P. G. / Pennino, M. G. / Seyboth, E. / Silveira, F. R. G. / Ferreira, E. C. / Secchi, E. R.

Animal conservation. 2021 Oct., v. 24, no. 5

2021

Abstract: Franciscana dolphin Pontoporia blainvillei bycatch has been high for near six decades in western South Atlantic, with large regional variation. In 2012, the Brazilian Government‐regulated gillnet fisheries in south and southeast Brazil by reducing ... ...

Abstract	Franciscana dolphin Pontoporia blainvillei bycatch has been high for near six decades in western South Atlantic, with large regional variation. In 2012, the Brazilian Government‐regulated gillnet fisheries in south and southeast Brazil by reducing fishing effort and establishing no‐fishing zones. However, there is evidence that the magnitude of franciscana bycatch remains high and unsustainable. The aims of this study were to identify hotspot areas of franciscana bycatch associated with two main gillnet fisheries and to propose no‐fishing zones combined with limited total allowable fishing effort (i.e. total net length per season) in order to meet management objectives in southern Brazil. A hierarchical Bayesian model using integrated nested Laplace approximation (INLA) was employed based on 1427 reported settings from 1999 to 2003 and 2006 to 2009. Hotspot zones were detected and are proposed as no‐fishing zone during the white croaker Micropogonias furnieri and striped weakfish Cynoscion guatucupa gillnet fishing seasons. Their extents represent 6% (1466.8 km²) and 19% (4493.7 km²) of the fishing ground (23 204.1 km²) during croaker and weakfish fishing seasons respectively. The total allowable fishing effort estimated outside the no‐fishing zones were estimated at 541 km (95% credible interval (CrI) [339; 940]) during croaker and 688 km (CrI [312; 2,166]) during weakfish fishing seasons, one order of magnitude lower than the current total fishing effort. The drastic reduction of total fishing effort estimated in this study is largely due to weak protection measures since the gillnet fisheries became the major conservation concern for franciscana by the end of 1970s in southern Brazil. Although the implementation of the proposed exclusion zones and limiting fishing effort will strongly impact the status quo, they were based on the best scientific evidence and on a clearly defined management goal to reduce the risk of the franciscana population’s collapse in southern Brazil.
Keywords	Bayesian theory ; Cynoscion guatucupa ; Micropogonias furnieri ; Pontoporia blainvillei ; bycatch ; dolphins ; gillnets ; risk reduction ; Brazil
Language	English
Dates of publication	2021-10
Size	p. 770-782.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	1415242-3
ISSN	1367-9430
ISSN	1367-9430
DOI	10.1111/acv.12679
Database	NAL-Catalogue (AGRICOLA)

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Article: New PLS analysis approach to wine volatile compounds characterization by near infrared spectroscopy (NIR).

Genisheva, Z / Quintelas, C / Mesquita, D P / Ferreira, E C / Oliveira, J M / Amaral, A L

Food chemistry

2017 Volume 246, Page(s) 172–178

Abstract: This work aims to explore the potential of near infrared (NIR) spectroscopy to quantify volatile compounds in Vinho Verde wines, commonly determined by gas chromatography. For this purpose, 105 Vinho Verde wine samples were analyzed using Fourier ... ...

Abstract	This work aims to explore the potential of near infrared (NIR) spectroscopy to quantify volatile compounds in Vinho Verde wines, commonly determined by gas chromatography. For this purpose, 105 Vinho Verde wine samples were analyzed using Fourier transform near infrared (FT-NIR) transmission spectroscopy in the range of 5435 cm
MeSH term(s)	Calibration ; Food Analysis/methods ; Fourier Analysis ; Least-Squares Analysis ; Principal Component Analysis ; Reproducibility of Results ; Signal Processing, Computer-Assisted ; Spectroscopy, Fourier Transform Infrared/methods ; Spectroscopy, Near-Infrared/methods ; Volatile Organic Compounds/analysis ; Wine/analysis
Chemical Substances	Volatile Organic Compounds
Language	English
Publishing date	2017-11-06
Publishing country	England
Document type	Journal Article
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2017.11.015
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Quantitative image analysis as a tool for Yarrowia lipolytica dimorphic growth evaluation in different culture media.

Braga, A / Mesquita, D P / Amaral, A L / Ferreira, E C / Belo, I

Journal of biotechnology

2016 Volume 217, Page(s) 22–30

Abstract: Yarrowia lipolytica, a yeast strain with a huge biotechnological potential, capable to produce metabolites such as γ-decalactone, citric acid, intracellular lipids and enzymes, possesses the ability to change its morphology in response to environmental ... ...

Abstract	Yarrowia lipolytica, a yeast strain with a huge biotechnological potential, capable to produce metabolites such as γ-decalactone, citric acid, intracellular lipids and enzymes, possesses the ability to change its morphology in response to environmental conditions. In the present study, a quantitative image analysis (QIA) procedure was developed for the identification and quantification of Y. lipolytica W29 and MTLY40-2P strains dimorphic growth, cultivated in batch cultures on hydrophilic (glucose and N-acetylglucosamine (GlcNAc) and hydrophobic (olive oil and castor oil) media. The morphological characterization of yeast cells by QIA techniques revealed that hydrophobic carbon sources, namely castor oil, should be preferred for both strains growth in the yeast single cell morphotype. On the other hand, hydrophilic sugars, namely glucose and GlcNAc caused a dimorphic transition growth towards the hyphae morphotype. Experiments for γ-decalactone production with MTLY40-2P strain in two distinct morphotypes (yeast single cells and hyphae cells) were also performed. The obtained results showed the adequacy of the proposed morphology monitoring tool in relation to each morphotype on the aroma production ability. The present work allowed establishing that QIA techniques can be a valuable tool for the identification of the best culture conditions for industrial processes implementation.
MeSH term(s)	Batch Cell Culture Techniques ; Biomass ; Carbon/chemistry ; Carbon/metabolism ; Culture Media/chemistry ; Hydrophobic and Hydrophilic Interactions ; Hyphae/cytology ; Hyphae/growth & development ; Mycology/methods ; Nitrogen/metabolism ; Optical Imaging/methods ; Yarrowia/cytology ; Yarrowia/growth & development ; Yarrowia/metabolism
Chemical Substances	Culture Media ; Carbon (7440-44-0) ; Nitrogen (N762921K75)
Language	English
Publishing date	2016-01-10
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	843647-2
ISSN	1873-4863 ; 0168-1656 ; 1389-0352
ISSN (online)	1873-4863
ISSN	0168-1656 ; 1389-0352
DOI	10.1016/j.jbiotec.2015.10.023
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Zs.A 2299: Show issues

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Article ; Online: Characterization of activated sludge abnormalities by image analysis and chemometric techniques.

Mesquita, D P / Amaral, A L / Ferreira, E C

Analytica chimica acta

2011 Volume 705, Issue 1-2, Page(s) 235–242

Abstract: This work focuses on the use of chemometric techniques for identifying activated sludge process abnormalities. Chemometric methods combined with image analysis can improve activated sludge systems monitoring and minimize the need of analytical ... ...

Abstract	This work focuses on the use of chemometric techniques for identifying activated sludge process abnormalities. Chemometric methods combined with image analysis can improve activated sludge systems monitoring and minimize the need of analytical measurements. For that purpose data was collected from aggregated and filamentous biomass, biomass composition on Gram-positive/Gram-negative bacteria and viable/damaged bacteria, and operational parameters. Principal component analysis (PCA) was subsequently applied to identify activated sludge abnormalities, allowing the identification of several disturbances, namely filamentous bulking, pinpoint flocs formation, and zoogleal bulking as well as normal conditions by grouping the collected samples in corresponding clusters.
MeSH term(s)	Biodegradation, Environmental ; Image Processing, Computer-Assisted/methods ; Principal Component Analysis ; Sewage/microbiology
Chemical Substances	Sewage
Language	English
Publishing date	2011-10-31
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1483436-4
ISSN	1873-4324 ; 0003-2670
ISSN (online)	1873-4324
ISSN	0003-2670
DOI	10.1016/j.aca.2011.05.050
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Identifying different types of bulking in an activated sludge system through quantitative image analysis.

Mesquita, D P / Amaral, A L / Ferreira, E C

Chemosphere

2011 Volume 85, Issue 4, Page(s) 643–652

Abstract: The present study proposes an image analysis methodology for the identification of different types of disturbances in wastewater treatment activated sludge systems. Up to date, most reported image analysis methodologies have been used in activated sludge ...

Abstract	The present study proposes an image analysis methodology for the identification of different types of disturbances in wastewater treatment activated sludge systems. Up to date, most reported image analysis methodologies have been used in activated sludge processes with the aim of filamentous bulking detection, however, other disturbances could be foreseen in wastewater treatment plants. Such disturbances can lead to fluctuations in the biomass contents, affecting the mixed liquor suspended solids (MLSS), and in the sludge settling ability, affecting the sludge volume index (SVI). Therefore, this work focuses on predicting the MLSS and SVI parameters for different types of disturbances affecting an activated sludge system. Four experiments were conducted simulating filamentous bulking, zoogleal or viscous bulking, pinpoint floc formation, and normal operating conditions. Alongside the MLSS and SVI determination, the aggregated and filamentous biomass contents and morphology were studied as well as the biomass Gram and viability status, by means of image analysis.
MeSH term(s)	Biomass ; Flocculation ; Gram-Negative Bacteria/cytology ; Gram-Positive Bacteria/cytology ; Image Processing, Computer-Assisted ; Microscopy, Fluorescence ; Sewage/analysis ; Sewage/microbiology ; Waste Disposal, Fluid
Chemical Substances	Sewage
Language	English
Publishing date	2011-10
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2011.07.012
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Article ; Online: Vanillin-condensed tannin study using flow injection spectrophotometry.

Ferreira, E C / Nogueira, A R

Talanta

2006 Volume 51, Issue 1, Page(s) 1–6

Abstract: Studies involving the kinetic reaction between vanillin and condensed tannins were developed using a flow injection system with spectrophotometric determination. A solution of the monomeric compound (-)-epicatechin was used as the analytical standard. ... ...

Abstract	Studies involving the kinetic reaction between vanillin and condensed tannins were developed using a flow injection system with spectrophotometric determination. A solution of the monomeric compound (-)-epicatechin was used as the analytical standard. This compound was chosen due to its structure, which is similar to a polymeric unit of the condensed tannin present in plants. The results indicated that the vanillin-condensed tannin reaction is time dependent and affected by the degree of polymerization of the condensed tannin. The flow system allowed (-)-epicatechin to be used without overestimating the content of the tannin present in the forage legume, guandu (Cajanus cajan (L.) Millsp.), studied. A relative standard deviation (R.S.D.) of <1% was found for a 4 h period work and allowed the determination of about 60 samples h(-1) with a detection limit of 1.05 mg l(-1) for condensed tannin. When compared to the manual vanillin procedure, the proposed approach can be used with various advantages.
Language	English
Publishing date	2006-01-23
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/s0039-9140(99)00222-2
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Article: New PLS analysis approach to wine volatile compounds characterization by near infrared spectroscopy (NIR)

Genisheva, Z. / Quintelas, C. / Mesquita, D. P. / Ferreira, E. C. / Oliveira, J. M. / Amaral, A. L.

Food Chemistry

2018 Volume 246, Page(s) 172–178

Abstract: NIR spectroscopy; PCA; PLS; volatile compounds; wine. ...

Institution	CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
Abstract	NIR spectroscopy; PCA; PLS; volatile compounds; wine.
Language	English
Document type	Article
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2017.11.015
Database	Viticulture and Oenology Abstracts

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