Veronica Calado

Federal University of Rio de Janeiro | UFRJ · Escola de Química (EQ)

Seaweed is a fast-growing biomass source that is currently studied as feedstock for sustainable industrial production in a wide variety of markets. Being composed mostly of polysaccharides, macroalgae can be integrated in biorefineries for obtaining bioproducts via fermentation. Kappaphycus alvarezii has been introduced experimentally to Brazil’s s...

The International Agency for Research on Cancer (IARC) has classified “very hot beverages” (consumed above 65°C) as “probably carcinogenic to humans” (group 2A) due to chronic thermal injury to the esophageal mucosa. In Brazil, coffee is the most consumed food product and is typically consumed hot. The aim of this cross-sectional study was to measu...

Lactic acid is a molecule used abundantly in the food, cosmetic, and pharmaceutical industries. It is also the building block for polylactic acid, a biodegradable polymer which has gained interest over the last decade. Seaweeds are fast growing, environmentally friendly, and economically beneficial. The Rhodophyta, Kappaphycus alvarezii, is a carra...

This study aimed at developing a probiotic fermented soymilk-based dessert containing coffee and soybean hull. Nine fermented formulations were elaborated with 10% powdered soymilk (w/v), varying percentages of sugar, arabica soluble coffee, and soy hull. They were fermented with probiotic strains of Lactobacilli and Bifidobacteria (10 6 CFU/mL). O...

Gas sensors are an emerging technology that contributes to the quality and freshness assessment in the food sector. Among the possible techniques to prepare gas sensors, film casting and electrospinning are considered easy and relatively simple methods. The present study aims at investigating the effect of processing on structural, morphological, t...

The evaluation of macroalgae as a new raw material for diverse bioprocesses is of great interest due to their fast growth rate and low environmental impact. Lactic acid has a high value in the bio-based industry and is mainly produced via fermentation. The anaerobic lactic acid fermentation of Kappaphycus alvarezii hydrolysates using the high-produ...

The processing of the orange leads to a large generation of waste, which is underutilized or discarded. Thus, this study proposes a route to treat oily waste from the orange juice industry, transforming it into a by‐product of higher added value to the chemical industry. The orange wax is obtained by hydrodistillation and solvent extraction, and th...

Although the presence of superficial pores and intragranular channels have been well described for cereal starches, cassava starch (CS) remained less well understood regarding its physical properties and deep chemical composition. Each CS granule is synthesized individually in one amyloplast enveloped with internal and external membranes. This enve...

The hydrogen bonding network analysis of softwood lignin is relevant to designing novel technologies to overcome the recalcitrance of plant biomass in the industrial deconstruction and manufacturing of lignin-based carbon fibers. In this work we examine, by atomistic simulations, the hydrogen bonding network in guaiacyl-rich lignin and guaiacyl-typ...

Science requires specialised terminologies to be precisely understood. Its specific vocabulary avoids one term having the same meaning for two different things. However, sometimes a misconception can occur and perpetuate by repetitive referencing citations without a sense of judgment. An apparent traditionalism seems to occlude updating. There are...

The current work evaluates the production of ligninolytic enzyme optimization via response surface methodology using different inducers: acid cellulignin (CA); MnSO4 (Mn2+); CuSO4·5H2O (Cu2+); veratryl (3, 4-dimethoxybenzyl); alcohol (VA); Tween 80% (T80); and the carbon-to-nitrogen ratio (C/N). A further goal was implementing a fed-batch strategy...

This work focuses on modeling, simulation and techno‐economic analysis, motivated by the great potential for transforming the residues of sweet orange peel (Citrus sinensis) from the food industry into products with higher added value. A techno‐economic analysis of the extraction process of limonene and linalool using supercritical CO2 in a continu...

Pomegranate seed oil (PSO) is rich in highly oxidizable bioactive conjugated linolenic acids (cLnA), limiting food applications. This study aimed to investigate the oxidative stability (room temperature for 90 days; 60 °C, for 10 days, vacuum-sealed or not), physical and morphological properties of PSO microparticles produced by complex coacervatio...

Main-chain type, elastomeric polybenzoxazines (abbreviated as CA-pdms-fu) with very high char yield have been developed. Seven compositions of elastomeric benzoxazine adhesives are synthesized to find the optimum structure by changing the chain length of the siloxane component. The successful synthesis of CA-pdms-fu derived from catechol is confirm...

Background The simple methods for Freshness assessment have been gained attention in the last years, mainly in case of highly perishable food products as those delivered by the meat sector. Furthermore, the growing demand for fresh and safe food makes the development of reliable, low-cost and time-saving methods for freshness investigation an impor...

Meat is considered a highly perishable food, and the interest in developing tools to monitor meat quality products has increased these years. A novel gelatin-ZnO-anthocyanin ternary nanocomposite film is proposed as a sensitive layer to meat quality monitoring in the present work. The incorporation of anthocyanin (ATH) on gelatin-ZnO (G-ZnO) film i...

This study has been focused on obtaining fungal laccases and structural modification of lignin by enzymatic action in laccase-ABTS system, mainly reducing molecular stiffness. The best specific aeration rate in bubble column reactor is 0.67 vvm, with 3260 U/L laccase activity, and enzymatic activity increased by 60% in stirred tank reactor. Enzymat...

The objective was to evaluate the effect of glycerol on functional properties and sorption behavior of films elaborated with myofibrillar proteins of fish. Analyses of solubility, water vapor permeability (WVP), tensile strength (TS), elongation, and moisture sorption isotherms were performed. Films with lower glycerol concentrations (5, 10, and 15...

The majority of the published bio-based benzoxazine research has focused almost exclusively on different phenolic and amine compounds, while the aldehyde portion of the oxazine ring remains the same. These materials have been labeled as fully bio-based even though only two of the three raw materials are derived from renewable resources. This study,...

To mitigate the fluid invasion and the loss of circulation, drilling fluids are designed to provide a thin mudcake with low permeability. Among the many methods of determining the mudcake properties, the absence of proper procedures related to the estimation of mudcake parameters that also consider the experimental uncertainties is noticed. Besides...

This work aimed at evaluating the rheological behavior and the application of coatings of fish myofibrillar proteins (LMP), cornstarch (CS), and gum arabic (GA) in fruit during storage. The rheological behavior of the LMP, CS, and GA solutions was carried out at the concentrations of 1 g of proteins, 3 g of corn starch, and 1 g of gum arabic, respe...

To more closely bridge the technological advent of shear thickening fluids with material applications, a well-defined sample preparation protocol is needed. In this work, preparation conditions have been studied for suspensions of precipitated calcium carbonate (PCC) particles by means of a 2k Factorial Experimental Design (DOE), with three center...

Correction for ‘A truly bio-based benzoxazine derived from three natural reactants obtained under environmentally friendly conditions and its polymer properties’ by Irlaine Machado et al. , Green Chem. , 2021, 23 , 4051–4064, DOI: 10.1039/D1GC00951F.

During the production of orange juice, more specifically after the commercial extraction of fruit juice, other waste materials are generated, consisting of peel, pieces of membranes, pulp bagasse, juice vesicles and seeds. In this way, the final destination of the waste can become a problem when not managed correctly. Therefore, there are several p...

A nacre-mimetic brick-and-mortar structure was used to develop a new flame-retardant technology. A second biomimetic approach was utilized to develop a non-flammable elastomeric benzoxazine for use as a polymer matrix that effectively adheres to the hydrophilic laponite nanofiller. A combination of laponite and benzoxazine is used to apply an ultra...

Cafestol and kahweol (C&K) are natural coffee diterpenes with high commercial value. There is thus interest in their synthesis although their isolation from natural products remains an alternative to recovering high quantities of C&K. The present work aimed at developing an isolation procedure to obtain C&K for both analytical purposes and in gram-...

Differential scanning calorimetry (DSC) coupled with machine-learning tools (random forest, gradient boosting machine, and multilayer perceptron, RF, GBM, MLP) were used to detect adulteration of raw bovine milk (formaldehyde, whey, urea, and starch). Adulterated samples presented a different DSC profile from raw milk. GBM and MLP were able to clas...

The United States is the largest coffee consumer country worldwide. Recently, in addition to cup quality, the focus on health promotion has increased outstandingly in the country, with launching of many brands with health claims, mainly concerning the antioxidative and stimulating properties of the beverage. Mycotoxins and, to a lesser extent, acry...

As an incipient but preeminent technology for multiphase nanomaterials/fluids, exact compatibilizing mechanisms of Janus particles in polymer blends and the consequent morphology remain unknown. The contributions of Janus nanorods to slip suppression and momentum transfer across the interface have been explored through Dissipative Particle Dynamics...

Gelatin-based nanocomposite films were prepared by casting and characterized as a sensitive hybrid material to relative humidity changes in the development of electrical sensors. Zinc oxide nanoparticles (ZnO-NPs) and glycerol (Gly) were incorporated as reinforcing and plasticizing agents, respectively, and their effects on the sensibility property...

Starch is synthesized in intracellular structures called amyloplasts, whose wraps delimiting the organelle are referred to as plastid membranes. Such envelopes are generally removed in the industrial processing of cereal starches, but not of cassava starch (CS), which is submitted to a different process. The occurrence of different rheological beha...

The objective of this study was to develop a functional ingredient containing punicic acid, a bioactive conjugated linolenic acid isomer, by microencapsulation of pomegranate seed oil (PSO) by complex coacervation. Whey protein and gum Arabic were used as encapsulating agents and spray drying was applied as a hardening step. The effects of total po...

Both in the academia and in the food sector, design of experiments is used to reduce the number of experiments and to build efficient regression models; thus providing optimum conditions to operate processes and to develop food formulations. In this chapter, problems involving mixtures in the food industry are considered. Theoretical aspects on opt...

The influence of important factors related to fluid preparation on shear-thickening fluids (STF) is not well explored in literature. Thus, this paper aimed at analyzing the statistical significance of experimental conditions, such as fumed silica concentration (Cs), stirring time (tst), stirring speed (Sst) and sonication time (tso ), on the rheolo...

The production of solketal fuel additive was studied from the reaction of glycerol and acetone in the presence of pressurized CO2 as switchable catalyst. A design of experiments (DoE) was used to study the significance of temperature, initial pressure of CO2, glycerol/acetone molar ratio, and reaction time. The response variable was the glycerol co...

With the outbreak of Yellow Fever in mid-2017, WHO recommended vaccination in risk areas and other regions of Brazil, made it necessary to increase the vaccine offer at the national level (PNI) and also international, backed by law 13801 -2019 sanctioned by the federal government in January 2019 which increases the Institutional commitment with the...

There is a great interest in increasing the levels of production of nanocellulose, either by adjusting production systems or by improving the raw material. Despite all the advantages and applications, nanocellulose still has a high cost compared to common fibers and to reverse this scenario it is required the development of new, cheaper and more ef...

Micronutrient deficiencies are of great public health and socioeconomic importance. Food fortification has been widely used as a simple low-cost resource to increase mineral intake. Considering that coffee is the most consumed food product worldwide, in this study, C. arabica and C. canephora seeds were roasted, ground, and fortified with three sal...

The disposal of residues from the agro‐industry and the consequent waste of valuable substances are a problem in Brazil and in many countries. The Ubá mango is the main variety of mango used by the industry in Brazil and its waste, consisting of the peel and the seed, is not used. The seed kernel of the mango is composed mainly of starch, which is...

Monoclonal antibodies (mAB) have highly efficient immune response for many diagnostic and therapeutic researches. Detection of flavivirus by using mABs in diagnostic kits, for instance, can be lower cost and faster alternative, creating important autonomy in the production of this input to our Country. A lyophilized presentation for mABs should be...

Research involving lignin use is not new. For many years, the macromolecule was underestimated in its potential and burned for energy use in pulp and paper industries. However, with the advent of biorefinery on the valorization of lignocellulosic fractions, lignin is receiving greater motivation to be researched. Of the many applications, the most...

Dairy foods are consumed in a large scale by most age groups and social classes, because it is recognized benefits for the consumers’ health and the advantages considering a nutritional point of view. In this sense, they are intentionally subjected to different types of frauds (removal of some valuable ingredients or even substitution of ingredient...

The oxidative stability of edible oils is an important feature to know due the undesirable changes that can occur in the storage. In this way, the oxidative induction time (OIT) value is an indicative to prevent this effect. The objectives of this study were to evaluate the omega-3 content and kinetic parameters of Sacha Inchi oil (SIO) and capsule...

A partir da entrada em vigor do artigo 93 da Lei 8.213/1991 passou a ser juridicamente exigível a contratação de trabalhadores com deficiência nas empresas com 100 (cem) ou mais empregados. Estatisticamente demonstra-se que apesar da eficácia técnica tal norma, ainda hoje, padece de ineficácia social. O presente artigo analisa em que medida é possí...

O presente artigo objetiva demonstrar como a questão da interpretação das normas jurídicas foi abordada pela Nova Retórica, de Chaïm Perelman. Surgida na década de 1950 como crítica ao positivismo jurídico, visa reinserir questões valorativas quando da aplicação das normas. Com o escopo de não comprometer a segurança jurídica atrelou ao conceito de...

O presente artigo objetiva demonstrar como a questão da interpretação das normas jurídicas foi abordada pela Nova Retórica, de Chaïm Perelman. Surgida na década de 1950 como crítica ao positivismo jurídico, visa reinserir questões valorativas quando da aplicação das normas. Com o escopo de não comprometer a segurança jurídica atrelou ao conceito de...

The aim of this work was to study the feasibility of producing an egg matrix candidate reference material for salinomycin. Preservation techniques investigated were freeze-drying and spray drying dehydration. Homogeneity and stability studies of the produced batches were conducted according to ISO Guides 34 and 35. The results showed that all produ...

The effect of the simultaneous ingestion of soymilk and coffee on the urinary excretion of isoflavones (ISO) and chlorogenic acids (CGA) was investigated for the first time in humans. In a randomized crossover study, soy (79.7 μmol ISO), coffee (561.2 μmol CGA) and soy-coffee beverage (79.7 μmol ISO and 561.2 μmol CGA) were ingested by adult subjec...

Starch is one of the most widely available natural biomaterials and is commonly used in biodegradable packaging. This book provides a comprehensive overview of recent developments in starch-based materials. The book focuses on the types of starch available from different sources, in particular the various aspects of preparation, structure, processi...

We aimed at investigating oxidative stability and changes in fatty acid and tocopherol composition of extra virgin olive oil (EVOO) in comparison with refined seed oils during short-term deep-frying of French fries, and changes in the composition of the French fries deep-fried in EVOO. EVOO samples from Spain, Brazil, and Portugal, and refined seed...

Os precursores mais empregados para obtenção da fibra de carbono são a poliacrilonitrila, o piche e o rayon. Com o aumento da demanda de materiais compósitos leves e de alta resistência, a produção da fibra de carbono tem aumentado exponencialmente e novos precursores têm sido requisitados. A lignina, um material orgânico natural, tem sido estudada...

CLA was microencapsulated by spray drying in ten varied wall systems (WS) consisting of pea protein isolate or pea protein concentrate (PPC) alone at varied core:WS ratios (1:2; 1:3 and 1:4), or blended with maltodextrin (M) and carboxymethylcellulose at a pea protein:carbohydrate ratio of 3:1. The physical–chemical properties of the CLA microparti...

Cupuaçu, também conhecido como cupu, cupuassu ou cupu-do-mato é uma das principais e mais consumidas frutas da região amazônica brasileira. O cupuaçu é uma fruta ácida, de sabor exótico e agradável, rico em compostos voláteis e sais minerais, pertence à família Sterculiacea, cuja denominação binomial é Theobroma grandiflorum schum. Esta fruta apres...

The adopted cure cycle in the filament winding process must lead to a completely cured composite. However, a restriction on the temperature should be observed to avoid the resin degradation. Here, an optimum cure cycle was determined using a hybrid neural network—first principles model (HNM) of the filament winding process and the particle swarm op...

This chapter provides some useful information regarding mathematical modelling in food science and technology by using design of experiments (DOE) followed by response surface methodology (RSM). It discusses some recent published researches based on RSM optimization of products and processes, with special attention to microbiology, sensory analysis...

An instantaneous food emulsion was formulated containing olive oil and lemon juice using combinations of polymers, such as Alginate (ALG), Arabic gum (AG), Maltodextrin (MD) and Carboxymethyl cellulose (CMC) and freeze-dried, aiming at the development of a new microencapsulated product. The characterization of particle size, the surface analysis by...

An instantaneous food emulsion was formulated containing olive oil and lemon juice using combinations of polymers, such as Alginate (ALG), Arabic gum (AG), Maltodextrin (MD) and Carboxymethyl cellulose (CMC) and freeze-dried, aiming at the development of a new microencapsulated product. The characterization of particle size, the surface analysis by...

The aim of this study was to characterize the penicillin-loaded microbeads composed of alginate and octenyl succinic anhydride (OSA) starch prepared by ionotropic pregelation with calcium chloride and to evaluate their in vitro drug delivery profile. The beads were characterized by size, scanning electron microscopy (SEM), zeta potential, swelling...