Raquel Guidetti Vendruscolo

• PhD Food Science and Technology
• Postdoctoral Researcher at Federal University from Jequitinhonha and Mucuri's Valleys

Bioactive fatty acids present in goat milk have the ability to reduce the risks of coronary heart disease in humans, and condensed tannins (CT) can modulate the polyunsaturated fatty acids (PUFA) biohydrogenation process in the rumen and consequently increase the levels of these fatty acids. Thus, the objective was to evaluate the inclusion of CT i...

The aim of this study was to evaluate the reduction in water supply (ad libitum intake-100%, or 80%, 60% and 40% of ad libitum intake) on the proximate composition, physicochemical properties, mineral composition and fatty acid profile of ewe meat. Thirty-two crossbred Santa Inês ewe (n = 8 per treatment) were distributed in a randomized block desi...

The aim of this study was to evaluate the reduction in water supply (ad libitum intake - 100%, or 80, 60 and 40% of ad libitum intake) on the proximate composition, physicochemical properties, mineral composition and fatty acid profile of ewe meat. Thirty-two crossbred Santa Inês ewe (n = 8 per treatment) were distributed in a randomized block desi...

Microalgae are photosynthetic microorganisms that stand out from conventional food sources and ingredients due to their high growth rate and adaptability. In addition to being highly sustainable, significant concentrations of proteins, lipids, and pigments accumulate in their cell structures from photosynthesis. Hence, this study sought to evaluate...

The objective of this work was to evaluate the effect of different photo-cycles on the growth and biochemical profile of Scenedesmus obliquus CPCC05, focusing on food interest compounds. The photo-cycle conditions were separated into three groups: long-term photo-cycles (24:0, 22:2, 20:4, 18:6, 12:12, and 10:14 (h:h)), frequency photo-cycles (2, 4,...

Oleaginous microorganisms, including the fungus Umbelopsis isabellina, have emerged as a biotechnological alternative to obtain polyunsaturated fatty acid-rich oils, which are strongly linked to energy purposes (biofuel) than the food industry. Considering the composition of microbial oil and its use by the food industry, it is necessary to investi...

The aim of this study was to determine whether the inclusion of silymarin in broiler feed was able to mitigate the adverse effects of mycotoxin on growth performance, health status, liver oxidative stress, and meat fatty acid profiles. A completely randomized design with four treatments, four repetitions, and 15 chicks per repetition was used, with...

There are still limitations in the pigment extraction methods used in microalgae biomass, especially for laboratory scale. This work aimed to develop a simple method for simultaneous extraction of chlorophylls and carotenoids from the microalgae Spirulina sp. and Scenedesmus obliquus. The extraction was performed using a methanol/chloroform (2:1 v/...

The composition of microalgae can contribute to nutritious and functional diets. Among the functional compounds, carotenoids are in focus since positive effects on human health have been established, which are in turn related to their bioaccessibility. In addition to essential nutrients, our hypothesis was that microalgae biomasses could be used as...

A freeze-dried extract from the bark of mate branches (BMBE) containing high chlorogenic acids (CGA) content (30 g 100 g⁻¹) was produced. Then, chia oil was mixed with 7.5% BMBE and sonicated for 0, 10, and 20 min. Chia oil with or without the addition of BMBE was hydrogelled and used to produce buffalo burgers with 50% reduction in animal fat. CGA...

Babassu cake (BC) is a byproduct from oil extraction from babassu palm kernels. The aim of this study was to evaluate the effect of including BC levels (0, 6, 12 and 18% on a dry matter basis) in the diet of twenty‐eight kids (n = 7 per treatment) on productive performance, and quality and profile of fatty acids (FA) of meat (loin). The inclusion o...

Sterol analysis of complex matrices can be very laborious. To minimize the existing drawbacks, a new micro-method of sterols and squalene determination in cyanobacteria was developed and applied to monitor their production of Phormidium autumnale cultured heterotrophically. Sample extraction/saponification and GC analysis of the target compounds we...

Filamentous fungi, such as Umbelopsis isabellina, produce oils rich in monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA), which are essential nutrients that regulate the physiological processes necessary for human health and development. Therefore, this study aimed to optimize the microbial oil production of Umbelopsis isabe...

BACKGROUND Considering that the greatest proportion of microalgae commercial production is realized outdoors, it is critically important to highlight the role of the local climate in the performance of the processes. Currently, there is a tendency to identify locations with suitable climates for the large‐scale implementation of microalgae‐based pr...

The present study aimed to evaluate two different processes of olive oil aromatization with Schinus terebinthifolius Raddi, conventional maceration (CM) and ultrasound-assisted maceration (UM), and their influence on quality parameters, total phenolic compounds (TPC), fatty acid profile (FA), volatile organic compounds (VOCs), antioxidant capacity,...

BACKGROUND Over 90% of microalgae cultivations on a commercial scale are grown in outdoor systems, which means that the performance of these bioprocesses is dependent on the climatic conditions in each particular locality. Thus, the selection of suitable locations according to their climatic conditions is extremely important to develop technically...

The objective of this study was to determine whether substitution of soybean oil by açai oil in the feed of laying hens at the end of the production cycle would improve health and performance, as well as egg quality. We used 56 laying hens (Hy Line Brown; 80 weeks old). The animals were kept in an experimental house, housed in cages with four anima...

LEDs have specific wavelengths that can positively influence the production of microalga biomass and biomolecules of interest. Filling the gaps in the literature, this study evaluated the effect of different LED wavelengths and photoperiods on protein productivities and free amino acid (FAA) profile of Spirulina sp. LEB 18 cultures. The best protei...

The aim of this study was to evaluate the effect of association of forage cactus meal (CM) and cunhã hay (CH) on carcass traits, meat quality, and fatty acid (FA) profile of goats. Twenty-four goats were finished on diets composed with the association of CM and CH (83% CH + 17% CM, 67% CH + 33% CM, or 50% CH + 50% CM), corresponding to 60% of the t...

Sterols present a diversity of structural compounds that vary according to the metabolism, including zoosterols from animal metabolism and phytosterols from vegetal metabolism. However, microalgae can produce a diversity of sterols, and their biosynthesis can change according to algae metabolism (heterotrophic or autotrophic). Therefore, the cultur...

The aim of this study was to evaluate whether the supplementation with açaí flour in the feed of laying hens at the end of the production cycle has beneficial effects on the health and performance of the birds and on the quality of the eggs. Groups received basal diets supplemented with 0%, 0.25%, 0.5%, 1.0%, and 2.0% açaí lump flour. We observed b...

Treatment of slaughterhouse wastewater is a huge industrial problem. The use of an algae biorefinery platform could be a sustainable technological alternative that produces value-added compounds instead of dumping the wastewater. For this reason, this research aimed to evaluate squalene production from the microalgae Phormidium autumnale cultivated...

Environmental factors directly affect the growth and composition of microalgal biomass. Therefore, the present work analyzed the metabolomics (amino acids, organic acids, and fatty acids) of the microalga Scenedesmus obliquus cultivated in 24:0 and 12:12 (light:dark) photoperiods and different phases of cell growth. Furthermore, the metabolites wer...

Sterol profiles were obtained from cyanobacteria Phormidium autumnale, cultivated in a heterotrophic system using three distinct sources of carbon: glucose, sucrose, and agroindustrial slaughterhouse wastewater. A simultaneous saponification-extraction ultrasound-assisted method was performed to determine sterol and other non-saponified compounds i...

One hundred fifty fungal strains were isolated from the Pampa biome for production of polyunsaturated fatty acids (PUFA). Microbial oil was produced by submerged cultivation at 120 rpm, 28 ºC for 7 days. Seven strains showed the best results for lipids accumulation, and they were selected in order to evaluate the influence of the temperature (15 an...

A method to simultaneously extract polar (PC) and non-polar compounds (NPC) from microalgae was developed for further determination of intracellular metabolites by gas chromatography. The proposed method was validated and used to characterize two Chlorophyceae, Chlorella vulgaris and Scenedesmus obliquus, and two Cyanobacteria, Aphanothece microsco...

The recovery of residual oil from palm kernel cake by supercritical carbon dioxide (CO2) and compressed liquefied petroleum gas (LPG) was evaluated. Extractions were carried out in order to investigate how pressure and temperature affect the extraction yield, chemical composition and antioxidant activity of the product. Even though the maximum yiel...

In total, 2520 chickens were randomly allocated into 36 pens with 70 chickens per pen. One group that served as the control was fed a basal diet, while the others were fed diets supplemented with olive leaves at 5 or 10 g/kg. At 42 days of age, chickens were slaughtered and the breast was used in the manufacture of chicken hamburgers. The lipid and...

This work is focused on the optimization of the ultrasound-assisted extraction of antioxidant compounds with photoprotective effect from palm pressed fiber. The influence of ultrasound intensity and pulse cycle was investigated by means of a central composite rotational design. The optimized condition was ultrasound intensity of 120 W.cm⁻² and puls...

Burgers subjected to lipid reformulation were made by replacing 50% of the fat component by microparticles containing chia (CO) and linseed (LO) oils obtained by external ionic gelation. The microparticles presented high n − 3 PUFAs levels and were resistant to the pH and temperature conditions commonly used in burger processing. The lipid reformul...

Grinding methods were evaluated aiming to determine yield and composition of essential oils (EOs) from Baccharis articulata (Lam) Pers., called as carqueja, a native plant from South Brazil. Cryogenic, knife (with and without cooling) and ball mills were used. The major constituents found in EOs were β-pinene, caryophyllene, spathulenol and caryoph...

Compressed liquefied petroleum gas (LPG) and CO2 were used for the extraction of bioactive compounds from palm pressed fiber (Elaeis guineensis). The influence of temperature and pressure on extraction yield, chemical composition, antioxidant activities towards superoxide and hydroxyl radicals and the sun protection factor were studied for each sol...

The effect of ultraviolet-C (UV-C) radiation (doses of 5.4 and 9.46 kJ/m2) on microbiological and lipid and protein oxidation of chicken drumsticks was evaluated at different temperatures of application (5 and 25C). Products were stored 12 days at 5C, showing a reduced number of total aerobic and psychrotrophic bacteria (P < 0.05) along almost all...

The microalgal biomass can be exploited in several ways and they are considered a source of high-value products. In this work the free amino acids were identified present on two distinct intra-cell microalgal biomass Chlorella vulgaris and Phormidium autumnale. The biomasses obtained from photo bioreactors were subjected to Bligh & Dyer extraction,...

Due to growing environmental concern has sought transition from today's fossil-fuel based on economy toward a bio-based economy. Microalgae are unicellular microorganisms having capacity to produce a countless compounds interest, as organic acids. In this work, organic acids were determined with potential as building blocks from microalgae Chlorell...

Two analytical procedures based on headspace solid-phase microextraction (HS-SPME) and static headspace (SH) extraction were developed for the characterization of minor and major volatile compounds of jelly palm wine, respectively. Volatile compounds were quantitatively evaluated (GC-FID) and identified by GC/MS and gas chromatography-olfactometry...