32 documents found, page 1 of 4
Azorean Cryptomeria japonica immature female cones essential oil: Effect of hyd...
Arruda, Filipe; Lima, Ana; Janeiro, Alexandre; Rodrigues, Tânia; Baptista, José; Rosa, José S.; Machado, Alexandra; Figueiredo, Ana C.; Lima, ElisabeteABSTRACT: Cryptomeria japonica’s wood production in Azores generates large amounts of underutilized biomass residues, such as immature female cones (Az–CJIFC), that can be used to produce essential oils (EOs). Hydrodistillation (HD) can be used both to obtain and to fractionate EOs. In this study, EOs from Az–CJIFC, grinded (GR) and non grinded (NGr) fresh samples, were obtained via HD over 4 h, yielding 1.0 % ...
Azorean Cryptomeria japonica immature female cones essential oil: Effect of hyd...
Arruda, Filipe; Lima, Ana; Janeiro, Alexandre; Rodrigues, Tânia; Baptista, José; Rosa, José S.; Machado, Alexandra; Figueiredo, Ana CristinaCryptomeria japonica's wood production in Azores generates large amounts of underutilized biomass residues, such as immature female cones (Az–CJIFC), that can be used to produce essential oils (EOs). Hydrodistillation (HD) can be used both to obtain and to fractionate EOs. In this study, EOs from Az–CJIFC, grinded (GR) and non-grinded (NGr) fresh samples, were obtained via HD over 4 h, yielding 1.0 % and 0.5 %,...
Angiotensin I-converting enzyme (ACE) inhibition and biological activities of g...
Paiva, Lisete; Lima, Elisabete; Marcone, Massimo; Baptista, JoséABSTRACT: The inhibition of ACE can be targeted in order to control hypertension and much attention has recently been paid towards the search for natural products as alternatives to synthetic drugs due to their adverse side effects associated with them. Camellia sinensis tea has received considerable attention due to the beneficial effects on health, particularly as a result of its antioxidant properties. The o...
Investigation of the Azorean Camellia sinensis Processing Conditions to Maximiz...
Paiva, Lisete; Lima, Elisabete; Motta, Madalena; Marcone, Massimo; Baptista, JoséABSTRACT: The molecular constituents of Camellia sinensis, in particular epigallocatechin‐3‐O‐gallate (EGCG) and, more remarkably, the galloylated theaflavins, mainly theaflavin‐3,3′‐di‐O‐gallate (TF‐3,3′‐DG), have been reported to inhibit SARS‐CoV‐2 3‐chymotrypsin‐like protease (3CLpro), an enzyme required for the cleavage of its polyproteins, to produce vital individual functional proteins for viral cell repl...
Cryptomeria japonica : inovar para (re)criar valor
Arruda, Filipe Martim Pacheco; Lima, Ana; Pavão, Alexandre; Baptista, José; Rosa, José S.; Lima, Elisabete[…] Por que as florestas são importantes? Os factos falam por si: as florestas cobrem 30% da superfície terrestre; armazenam cerca de 300 gigatoneladas de carbono na biomassa; são o habitat de mais de 80% de todas as espécies terrestres; são o meio de subsistência para cerca de 1,6 biliões de pessoas; contribuem para a saúde humana e bem estar, fatores fundamentais para a qualidade de vida de um indivíduo; ofer...
Comparative Analysis of the Polyphenols, Caffeine, and Antioxidant Activities o...
Paiva, Lisete S.; Rego, Clara; Lima, Elisabete; Marcone, Massimo; Baptista, JoséThis study evaluates the polyphenol profiles as well as caffeine (dry weight basis), and antioxidant activities of green tea (GTs), white tea (WTs), and flowers (Fl) samples from Azorean Camellia sinensis varieties affected by different harvested and processing conditions. Epicatechins derivatives, determined by RP-HPLC/PDAD, presented higher values in GTs with respect to WTs, decreasing as follows: epigallocat...
Influence of Seasonal and Yearly Variation on Phenolic Profiles, Caffeine, and ...
Paiva, Lisete S.; Lima, Elisabete; Motta, Madalena; Marcone, Massimo; Baptista, JoséThis study compares the antioxidant properties (RSA(DPPH)-DPPH radical scavenging activity, FRAP-ferric reducing activity power, and FIC-ferrous ion-chelating activity), the total phenolics (TP), total flavonoids (TF), and catechin profiles, as well as the caffeine content of Azorean Camellia sinensis green tea collected in seasons of two different years. The RSA(DPPH) showed some variation between 2019 and 202...
Os efeitos benéficos do chá de Camellia sinensis (L.) na saúde humana
Paiva, Lisete S.; Lima, Elisabete; Motta, Madalena; Baptista, JoséOriginária da China, a planta do chá (Camellia sinensis) expandiu-se gradualmente por vários países subtropicais e, desde a última década do século XIX, o chá é também produzido e comercializado num único lugar na Europa, a Ilha de São Miguel, Açores. O chá de C. sinensis tem recebido muita atenção, particularmente da comunidade científica, devido aos seus diversos efeitos benéficos na saúde humana, nomeadament...
Variability of antioxidant properties, catechins, caffeine, L-theanine and othe...
Paiva, Lisete S.; Lima, Elisabete; Motta, Madalena; Marcone, Massimo; Baptista, JoséDuring Camellia sinensis tea processing, manufacturers usually remove the internodes, which are classified as waste. This study presents the first determination of plant part contribution, particularly internodes, to green tea quality, in order to find the best blend to maximize impact on human health. Catechins, caffeine and free amino acid (FAA) profiles were determined by RP-HPLC/DAD, total phenolics (TPC) a...
The surplus value of Azorean Camellia sinensis flowers as an important contribu...
Baptista, José; Paiva, Lisete S.; Lima, Elisabete; Motta, MadalenaLeaves from Camellia sinensis have been used to make teas for a long time, however, less attention has been paid to the flowers, which is a waste of an abundant resource that should be valorized. This study evaluates the representative tea metabolites content (dry weight basis) and antioxidant properties of Azorean C. sinensis flowers as compared to commercial Gorreana green tea (GorGT), the only one produced i...