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Article ; Online: Building pathologies caused by failure of Fundão Tailing Dam: A principal component analysis aproach.

Silva Junior, Ladir Antonio DA / Santos, Tatiana B Dos

Anais da Academia Brasileira de Ciencias

2023 Volume 95, Issue suppl 1, Page(s) e20220458

Abstract: This article presents a study of the impacts caused by Fundão dam failure in buildings from Gesteira district, Barra Longa city, Brazil. The analyzed dataset was built using technical reports from surveys carried out in 152 buildings. Principal component ...

Abstract	This article presents a study of the impacts caused by Fundão dam failure in buildings from Gesteira district, Barra Longa city, Brazil. The analyzed dataset was built using technical reports from surveys carried out in 152 buildings. Principal component analysis was capable of explain the interdependence of data variable and allowed conditions of understand the consequences and evidenced pathologies. Heavy vehicle traffic caused more damage (57% of buildings) to the studied buildings than the contact with the tailing mud (43% of buildings).
Language	English
Publishing date	2023-08-28
Publishing country	Brazil
Document type	Journal Article
ZDB-ID	2046885-4
ISSN	1678-2690 ; 0001-3765
ISSN (online)	1678-2690
ISSN	0001-3765
DOI	10.1590/0001-3765202320220458
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Article ; Online: Failure risk of brazilian tailings dams: a data mining approach.

Santos, Tatiana B / Oliveira, Rudinei M

Anais da Academia Brasileira de Ciencias

2021 Volume 93, Issue 4, Page(s) e20201242

Abstract: This paper proposes the use of a hybrid method that combines Biased Random Key Genetic Algorithm (BRKGA) with a local search heuristic to separate Brazilian tailing dam data into groups. The goal was identifying dams similar to Fundão and B1 failed dams. ...

Abstract	This paper proposes the use of a hybrid method that combines Biased Random Key Genetic Algorithm (BRKGA) with a local search heuristic to separate Brazilian tailing dam data into groups. The goal was identifying dams similar to Fundão and B1 failed dams. The groups were created by solving the clustering problem by BRKGA. The clustering problem consists in separating a set of objects into groups such that members of each group are similar to each other. The data was composed by 427 dams, with the actual 425 dams of Brazilian Register of Tailing Dams and the two Brazilian failed dams from the last years. Computational experiments considering real data available are presented to demonstrate the efficacy of the proposed method producing feasible solutions. Thus, it is expected that the good results can be applied in the identification of tailings dams with risk potentials, assisting in the identification of these dams.
MeSH term(s)	Brazil ; Data Mining
Language	English
Publishing date	2021-09-24
Publishing country	Brazil
Document type	Journal Article
ZDB-ID	2046885-4
ISSN	1678-2690 ; 0001-3765
ISSN (online)	1678-2690
ISSN	0001-3765
DOI	10.1590/0001-3765202120201242
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Article ; Online: Primary thyroid lymphoma: a case of postoperative diagnosis in a patient with toxic multinodular goiter.

Nunes Coelho, Margarida / Cunha, Filipe / Almeida, Joana Isabel / Santos, Tatiana / Marques, Isabel

Porto biomedical journal

2024 Volume 9, Issue 2, Page(s) 246

Language	English
Publishing date	2024-03-08
Publishing country	United States
Document type	Journal Article
ISSN	2444-8672
ISSN (online)	2444-8672
DOI	10.1097/j.pbj.0000000000000246
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Article: Pancreaticopleural fistula as the inaugural presentation of chronic pancreatitis: A case report.

Coelho, Margarida Nunes / Basto, Tatiana / Almeida, Joana / Soares, Carlos / Santos, Tatiana / da Silva, João Barros

International journal of surgery case reports

2024 Volume 119, Page(s) 109755

Abstract: Introduction: Pancreaticopleural fistula is a rare complication most associated with alcohol-induced chronic pancreatitis. This usually presents with chest symptoms instead of abdominal ones. Diagnosis requires a high index of suspicion in patients with ...

Abstract	Introduction: Pancreaticopleural fistula is a rare complication most associated with alcohol-induced chronic pancreatitis. This usually presents with chest symptoms instead of abdominal ones. Diagnosis requires a high index of suspicion in patients with pancreatitis and persistent pleural effusions. Presentation of case: We present a case of an 81-years-old man admitted in the emergency department with a one week complaints of productive cough, fever, dyspnea and left-side chest pain. The chest X-ray revealed a moderated-volume left-side pleural effusion. The pleural fluid analysis was consistent with an exsudative pleural effusion with high levels of amylase. The thoracoabdominal CT raised the suspicion of a pancreaticopleural fistula, confirmed by ERCP. A pancreatic main duct stenting was performed with good results. The patient was discharged asymptomatic after 18 days of hospitalization. Discussion: Because of PPF insidious presentation it poses a great number of differential diagnosis, so pleural fluid analysis is of paramount importance with high levels of amylase confirming the diagnosis. MRCP and ERCP may establish the fistulous tract between the pancreatic duct and the pleural cavity, with the latter being also therapeutic. Conclusion: The rarity of this complication related to pancreatitis and the seldomly presence of abdominal pain in contrast with chest symptoms poses a diagnostic challenge.
Language	English
Publishing date	2024-05-15
Publishing country	Netherlands
Document type	Case Reports
ISSN	2210-2612
ISSN	2210-2612
DOI	10.1016/j.ijscr.2024.109755
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Article ; Online: Alignment-Rheology Relationship of Biosourced Rod-Like Colloids and Polymers under Flow.

Detert, Marvin / Santos, Tatiana Porto / Shen, Amy Q / Calabrese, Vincenzo

Biomacromolecules

2023 Volume 24, Issue 7, Page(s) 3304–3312

Abstract: Fluids composed of biosourced rod-like colloids (RC) and rod-like polymers (RP) have been extensively studied due to various promising applications relying on their flow-induced orientation (e.g., fiber spinning). However, the relationship between RC and ...

Abstract	Fluids composed of biosourced rod-like colloids (RC) and rod-like polymers (RP) have been extensively studied due to various promising applications relying on their flow-induced orientation (e.g., fiber spinning). However, the relationship between RC and RP alignment and the resulting rheological properties is unclear due to experimental challenges. We investigate the alignment-rheology relationship for a variety of biosourced RC and RP, including cellulose-based particles, filamentous viruses, and xanthan gum, by simultaneous measurements of the shear viscosity and fluid anisotropy under rheometric shear flows. For each system, the RC and RP contribution to the fluid viscosity, captured by the specific viscosity η
MeSH term(s)	Polymers/chemistry ; Colloids ; Cellulose ; Rheology ; Viscosity
Chemical Substances	Polymers ; Colloids ; Cellulose (9004-34-6)
Language	English
Publishing date	2023-06-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1526-4602
ISSN (online)	1526-4602
DOI	10.1021/acs.biomac.3c00347
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Article ; Online: A ética do cuidado e cuidado paliativo pediátrico: um diálogo possível.

Santos, Tatiana Vasconcelos Dos / Moreira, Martha Cristina Nunes / Sevilha, Marina

Ciencia & saude coletiva

2022 Volume 28, Issue 4, Page(s) 1011–1019

Abstract: This article, in an essay format, seeks to establish a dialogue between the ethics of care and pediatric palliative care, taking into consideration the fact that moral perceptions are based on a network of relationships, while care is built on ... ...

Title translation	The ethics of care and pediatric palliative care: a potential dialogue.
Abstract	This article, in an essay format, seeks to establish a dialogue between the ethics of care and pediatric palliative care, taking into consideration the fact that moral perceptions are based on a network of relationships, while care is built on intersubjectivity. Four pillars that are referred to as movements are discussed: the ethics of care, as a feminist ethic, in a dialogue with pediatric palliative care, and communication and autonomy as tools of care based on their relational aspects. The conclusion drawn is that considering these aspects from a palliative standpoint can be a way to implement a moral commitment of care.
MeSH term(s)	Humans ; Child ; Palliative Care ; Morals ; Communication
Language	Portuguese
Publishing date	2022-10-16
Publishing country	Brazil
Document type	English Abstract ; Journal Article
ZDB-ID	2078799-6
ISSN	1678-4561 ; 1678-4561
ISSN (online)	1678-4561
ISSN	1678-4561
DOI	10.1590/1413-81232023284.12422022
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Article ; Online: Microfluidics as a tool to assess and induce emulsion destabilization.

Porto Santos, Tatiana / Cejas, Cesare M / Cunha, Rosiane Lopes

Soft matter

2022 Volume 18, Issue 4, Page(s) 698–710

Abstract: Microfluidic technology enables judicious control of the process parameters on a small length scale, which in turn allows speeding up the destabilization of emulsion droplets interface in microfluidic devices. In this light, microfluidic channels can be ... ...

Abstract	Microfluidic technology enables judicious control of the process parameters on a small length scale, which in turn allows speeding up the destabilization of emulsion droplets interface in microfluidic devices. In this light, microfluidic channels can be used as an efficient tool to assess emulsion stability and to observe the behavior of the droplets immediately after their formation, enabling to determine whether or not they are prone to re-coalescence. Observation of the droplets after emulsifier adsorption also allows the investigation of emulsion stability over time. Both evaluations would contribute to determine emulsion stability aiming at specific applications in food and pharmaceutical industries. Furthermore, emulsion coalescence can also be performed under extremely controlled conditions within the microfluidic devices in order to explore emulsion droplets as micro-reactors (for regulated biological and chemical assays). Such microfluidic procedures can be performed either in confined environments or under dynamic flow conditions. Under confined environments, droplets are observed in fixed positions simulating different environmental conditions. On the other hand, with the scrutiny of emulsions under dynamic flow processes, it is possible to determine the behavior of the droplets when subjected to shear forces, comparable to those experienced in conventional emulsification techniques or even in pumping operations. Given the above, this paper reviews different microfluidic techniques (such as changing channel geometry or wettability) hitherto used to destabilize emulsions, mainly focusing on the specificities of each study, whether the droplets are destabilized in confined or dynamic flow processes. Thereby, by going deeper into this review, readers will be able to identify different strategies for emulsion destabilization (in order to understand stabilizing mechanisms or even to apply these droplets as micro-reactors), as this paper shows the particularities of the most recent studies and elucidates the current state-of-the-art of this microfluidic-related application.
MeSH term(s)	Emulsifying Agents ; Emulsions ; Lab-On-A-Chip Devices ; Microfluidics
Chemical Substances	Emulsifying Agents ; Emulsions
Language	English
Publishing date	2022-01-26
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	2191476-X
ISSN	1744-6848 ; 1744-683X
ISSN (online)	1744-6848
ISSN	1744-683X
DOI	10.1039/d1sm01588e
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Article: Nano and micro lupin protein-grape seed extract conjugates stabilizing oil-in-water emulsions

Francisco, Cristhian Rafael Lopes / Santos, Tatiana Porto / Cunha, Rosiane Lopes

Food hydrocolloids. 2023 Feb., v. 135

2023

Abstract: Conjugation of plant proteins with phenolic compounds has been an efficient strategy to improve the limited capacity of this kind of protein to stabilize emulsions. In this sense, the stabilizing capacity of lupin protein-grape seed extract conjugates in ...

Abstract	Conjugation of plant proteins with phenolic compounds has been an efficient strategy to improve the limited capacity of this kind of protein to stabilize emulsions. In this sense, the stabilizing capacity of lupin protein-grape seed extract conjugates in the form of nano (NC) or micro (MC) particles was evaluated in oil-in-water emulsions. Covalent binding between lupin protein isolate (LPI) and grape seed extract (GSE) was confirmed by quantification of total free sulfhydryl groups and fluorescence assays in both NC and MC for all GSE concentrations tested (0.04–0.12 wt%). The main differences between MC and NC were the larger size and surface hydrophobicity of the former, reflecting different stabilizing capacities. The droplet size and microstructure of all emulsions after 28 days of storage suggest that NC- and MC-stabilized emulsions were highly stable to coalescence. However, NC produced emulsions with a higher tendency to flocculation. Increasing the GSE concentration in the conjugates attenuated the droplet flocculation, resulting in emulsions with improved kinetic stability. Results indicate that the dominant stabilizing mechanism of the conjugates is Pickering-type, although others may occur simultaneously. Indeed, MC produced emulsions with better stability with no visible creaming and more complex rheological properties. A gel-like behavior (G’>G’’) was observed from oscillatory rheology, which was considered an additional stabilizing mechanism. In contrast, NC produced emulsions with predominantly liquid-like behavior (G’’>G’). Shear resistance was evaluated after homogenization of the emulsions, showing that the 3D network formed in the emulsions was rapidly recovered, including the highly structured MC-stabilized emulsions. Different properties of emulsions stabilized by NC or MC indicate potential varied applications in the food industry. The conjugation of GSE with LPI showed improvements in the overall stability of the emulsions, demonstrating the great potential for usage of these conjugates in the formulation of highly stable emulsion-based systems, even using a protein of limited stabilizing capacity.
Keywords	Lupinus ; droplet size ; droplets ; flocculation ; fluorescence ; food industry ; grape seed extract ; homogenization ; hydrocolloids ; hydrophobicity ; microstructure ; protein isolates ; rheology
Language	English
Dates of publication	2023-02
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	742742-6
ISSN	1873-7137 ; 0268-005X
ISSN (online)	1873-7137
ISSN	0268-005X
DOI	10.1016/j.foodhyd.2022.108117
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Flow-induced alignment of protein nanofibril dispersions

Santos, Tatiana P. / Calabrese, Vincenzo / Boehm, Michael W. / Baier, Stefan K. / Shen, Amy Q.

Journal of Colloid And Interface Science. 2023 May, v. 638 p.487-497

2023

Abstract: Protein nanofibrils (PNF) resulting from the self-assembly of proteins or peptides can present structural ordering triggered by numerous factors, including the shear flow. We hypothesize that i) depending on the contour length of the PNF and the ... ...

Abstract	Protein nanofibrils (PNF) resulting from the self-assembly of proteins or peptides can present structural ordering triggered by numerous factors, including the shear flow. We hypothesize that i) depending on the contour length of the PNF and the magnitude of the shear rate applied to the PNF dispersion, they exhibit specific orientation, and ii) it is possible to predict the alignment of PNF by establishing a flow-alignment relationship. Understanding such a relationship is pivotal to improving the fundamental knowledge and application of fibril systems. We use β-lactoglobulin PNF aqueous dispersions with different average contour lengths but equal persistence lengths. We employ simple shear-dominated microfluidic devices with state-of-the-art imaging techniques: flow-induced birefringence (FIB) and micro-particle image velocimetry (μ-PIV), to probe the effect of shear flow on PNF alignment. We provide an empirical relationship connecting the birefringence Δn (quantifying the extent of PNF alignment), and the Péclet number Pe (correlating the shear rate of the flow relative to the rotational diffusion of PNF) to understand the flow-alignment behavior of PNF under shear-dominated flows. Furthermore, we assess the alignment and flow profile of PNF at both high and low flow rates. The length of PNF emerges as a controlling parameter capable of modulating PNF alignment at specific shear rates. Our results shed new insights into the hydrodynamic behavior of PNF, which is highly relevant to various industrial processes involving the fibril systems.
Keywords	Peclet number ; hydrodynamics ; microparticles ; nanofibers ; peptides ; velocimetry ; Colloidal rods ; Microfluidics ; Shear flow ; Flexibility ; β-lactoglobulin ; Whey protein
Language	English
Dates of publication	2023-05
Size	p. 487-497.
Publishing place	Elsevier Inc.
Document type	Article ; Online
Note	Use and reproduction
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2023.01.105
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Article ; Online: Sunflower waxes as natural structuring agents to improve the technological properties of water-in-oil (W/O) high internal phase emulsions (HIPEs)

Fonseca, Larissa Ribas / Santos, Matheus Augusto Silva / Santos, Tatiana Porto / Cunha, Rosiane Lopes

Journal of Food Engineering. 2023 Nov., v. 357 p.111638-

2023

Abstract: High internal phase water-in-oil emulsions (W/O HIPEs) are promising fat replacers in food systems. In this work, sunflower wax (SW) or hydrolyzed sunflower wax (SWH) (up to 2% w/w) and a fixed PGPR concentration (0.5% w/w) were used to stabilize ... ...

Abstract	High internal phase water-in-oil emulsions (W/O HIPEs) are promising fat replacers in food systems. In this work, sunflower wax (SW) or hydrolyzed sunflower wax (SWH) (up to 2% w/w) and a fixed PGPR concentration (0.5% w/w) were used to stabilize emulsions with a high volume fraction of water dispersed phase (80% w/w) and sunflower oil continuous phase (20% w/w). Our results showed that 0.5% (w/w) of SW is able to stabilize the W/O HIPEs, while at least 1.0% (w/w) of SWH was required to promote the same stabilization effect. Furthermore, increasing wax concentration reduced droplet size of fresh W/O HIPEs. However, regardless of the concentration, similar droplet sizes were found for each type of wax after 7 days of preparation. In addition, emulsions structured with SW showed smaller droplet sizes and, consequently, better kinetic stability for 60 days of storage. Oscillatory rheology results showed that the storage modulus (G') prevailed over the loss modulus (G″) with the addition of waxes to the formulation. This indicates the presence of a more elastic crystalline structure, which was also corroborated by polarized light microscopy. This study sheds new insights on the mechanisms of emulsions stabilization by sunflower waxes and opens the opportunity for the applicability of W/O HIPEs in the development of food structure.
Keywords	Helianthus annuus ; crystal structure ; droplet size ; droplets ; hydrolysis ; loss modulus ; polarized light microscopy ; rheology ; storage modulus ; sunflower oil ; Sunflower waxes ; Food emulsions ; W/O HIPEs ; Oleogel ; Fat replacer ; Stability
Language	English
Dates of publication	2023-11
Publishing place	Elsevier Ltd
Document type	Article ; Online
ZDB-ID	622518-4
ISSN	0260-8774
ISSN	0260-8774
DOI	10.1016/j.jfoodeng.2023.111638
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