Luíz Guilherme Malaquias da Silva

Ms. Luíz Guilherme Malaquias da Silva

orcid
PhD. student in Food Science

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 June 2024 in Food Research International
Verified
Journal Article
Closed access
CCCarlos Alexandre Rocha da Costa
Carlos Alexandre Rocha da Costa
SNSidney Vasconcelos Do Nascimento
Sidney Vasconcelos Do Nascimento
RVRafael B. S. Valadares
Rafael B. S. Valadares
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
GMGilson Gustavo Lucinda Machado
Gilson Gustavo Lucinda Machado
EBEduardo Vilas Boas
Eduardo Vilas Boas

9 December 2023 in Journal of Food Science and Technology
Verified
Journal Article
Open access
PDF file
EMEtivaldo Marcolino
Etivaldo Marcolino
DSDiogo Salavarria
Diogo Salavarria
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
AAAdelaide Almeida
Adelaide Almeida
FSFlávia Matias Oliveira da Silva
Flávia Matias Oliveira da Silva
JDJoão Dias
João Dias
The baobab tree (Adansonia digitata) can be found in sub-Saharan Africa, and its fruit presents high nutritional value. However, baobab seeds are often discarded and their potential remains underutilized. This study aimed to investigate the effect of roasting time (30/55/80/105 min at 200 °C) on the physical–chemical properties of baobab seeds and the bioactive compounds in a coffee-like beverage. The results showed a decrease in moisture, Aw (water activity), and hardness of baobab seeds with increasing roasting time. These changes resulted from moisture loss, caramelization, and Maillard reactions, which also affected appearance when compared with unroasted baobab seeds. The pH of the beverage decreased to a value of around 6.01 after 105 min of roasting. The total phenolic content and antioxidant activity of the beverage increased with roasting time, reaching 851.2 mg GAE/100 g (after 80 min) and 18.9 mmol Fe2+/100 g (after 55 min), respectively. The caffeine content remained stable around 16 mg/100 g from 55 to 105 min, lower than that of unroasted coffee beans and decaffeinated coffee. These findings suggest the potential for valorizing baobab seeds in the development of a new coffee-like beverage with lower caffeine content.

2 January 2025 in Food Research International
Verified
Journal Article
Closed access
GMGracieli de Miranda Monteiro
Gracieli de Miranda Monteiro
ECElisângela Elena Nunes Carvalho
Elisângela Elena Nunes Carvalho
RLRafael Carvalho Do Lago
Rafael Carvalho Do Lago
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
LSLorrane Ribeiro de Souza
Lorrane Ribeiro de Souza
EBEduardo Valério de Barros Vilas Boas
Eduardo Valério de Barros Vilas Boas

25 August 2024 in Food and Humanity
Verified
Journal Article
Open access
CCCarlos Alexandre Rocha da Costa
Carlos Alexandre Rocha da Costa
FPFernanda Soares Pinheiro
Fernanda Soares Pinheiro
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
Flávia Matias Oliveira SilvaFlávia Matias Oliveira Silva
Flávia Matias Oliveira Silva
MTMaricely Janette Uria Toro
Maricely Janette Uria Toro

28 November 2024 in Scientia Horticulturae
Verified
Journal Article
Open access
CCCarlos Alexandre Rocha da Costa
Carlos Alexandre Rocha da Costa
SNSidney Vasconcelos Do Nascimento
Sidney Vasconcelos Do Nascimento
RVRafael Borges da Silva Valadares
Rafael Borges da Silva Valadares
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
GMGilson Gustavo Lucinda Machado
Gilson Gustavo Lucinda Machado
EBEduardo Valério de Barros Vilas Boas
Eduardo Valério de Barros Vilas Boas

1 January 2025 in Technology in Horticulture
Verified
Journal Article
Open access
PDF file
Luíz Guilherme Malaquias da SilvaLuíz Guilherme Malaquias da Silva
Luíz Guilherme Malaquias da Silva
CCCarlos Alexandre Rocha da Costa
Carlos Alexandre Rocha da Costa
GBGiovanni Aleixo Batista
Giovanni Aleixo Batista
KAKatiúcia Alves Amorim
Katiúcia Alves Amorim
DADanilo José Machado de Abreu
Danilo José Machado de Abreu
ECElisângela Elena Nunes Carvalho
Elisângela Elena Nunes Carvalho
Recent taxonomic updates confirm Selenicereus as a valid genus, replacing older nomenclature such as Cereus megalanthus, Mediocactus megalanthus, and Hylocereus. Despite pitaya's adaptability to hot and humid climates, flowering and fruit development are strongly influenced by environmental factors such as photoperiod and temperature. Critical photoperiods, especially those falling below 12 h of daylight in higher latitudes, can inhibit flowering. Nighttime light supplementation (LS) has emerged as a key approach to overcoming these limitations, demonstrating considerable potential for inducing or enhancing flowering during off-season periods. Studies show that LS using LEDs substantially increases fruit yield by up to 44%, pulp mass by 35%, and soluble solid content by 18% in certain cultivars. Hormonal changes—including elevated cytokinin, gibberellin, auxin, and other phytohormones—have been observed, correlating with improved floral bud formation and subsequent fruit quality. Furthermore, LS has been associated with increases of up to 25% in total phenolics and 30% in carotenoids, reinforcing the nutritional and sensory attributes of pitaya. Pitaya's intraspecific variability also underlines the importance of investigating genetic, agronomic, and biochemical factors to optimize production and meet the growing consumer demand for high-quality fruit. Although the current body of research highlights LS as a promising means to boost yields and quality, comprehensive evaluations of the phytochemical and nutritional profiles of LS-treated pitayas remain limited. Future studies should elucidate how increased fruit mass under LS conditions translates to proportional gains in bioactive compounds, providing valuable insights for producers and researchers aiming to refine pitaya production practices.