<b>Analysis of some chemical nutrients in four Brazilian tropical seaweeds

Abstract

Seaweeds have various chemical components with beneficial effects for human use; however, their nutritional values in Brazilian species are not well known. This study aimed to evaluate the content of water, ash, protein, carbohydrate, and lipid in four seaweeds (Hypnea musciformis, Solieria filiformis, Caulerpa cupressoides and C. mexicana). Algal constituents were determined by difference, gravimetric or colorimetric method, being the values expressed as g 100 g -1 dehydrated weight (d.w.). Results revealed that the water (10.7 ± 0.18-15.06 ± 1.14 g 100 g -1 d.w.), ash (7.79 ± 0.87-15.12 ± 0.51 g 100 g -1 d.w), protein (17.12 ± 0.99-20.79 ± 0.58 g 100 g -1 d.w.), lipid (0.33 ± 0.01-3.77 ± 0.13 g 100 g -1 d.w.) and carbohydrate (38.07 ± 0.32-54.24 ± 0.157 g 100 g -1 d.w.) contents varied between the species (p < 0.05). H. musciformis and S. filiformis (Rhodophyta) had highest ash contents (14.14 ± 1.23-15.12 ± 0.51 g 100 g -1 d.w.), whereas lipids were higher for Caulerpa species (Chlorophyta) (1.52 ± 0.17-3.77 ± 0.13 g 100 g -1 d.w.) (p < 0.05). Protein and carbohydrate were the most sources in all the species. Therefore, the studied seaweeds could be a potential source of food ingredients for diets.Análise de alguns nutrientes químicos em quatro algas marinhas tropicais brasileiras RESUMO. As algas marinhas possuem vários componentes químicos com efeitos benéficos para uso humano. Entretanto, não são conhecidos bem seus valores nutricionais em espécies brasileiras. Objetivou-se avaliar os conteúdos de água, cinza, proteína, carboidrato e lipídio em quatro algas marinhas (Hypnea musciformis, Solieria filiformis, Caulerpa cupressoides e C. mexicana). Os constituintes das algas foram determinados por método de diferença, gravimétrico ou colorimétrico, sendo os valores expressos em g 100 g -1 de peso desidratado (p.d.). Os resultados revelaram que os conteúdos de água (10,7 ± 0,18-15,06 ± 1,14 g 100 g -1 p.d.), cinza (7,79 ± 0,87-15,12 ± 0,51 g 100 g -1 p.d.), proteína (17,12 ± 0,99-20,79 ± 0,58 g 100 g -1 p.d.), lipídio (0,33 ± 0,01-3,77 ± 0,13 g 100 g -1 p.d.) e carboidrato (38,07 ± 0,32-54,24 ± 0,157 g 100 g -1 p.d.) variaram entre as espécies (p < 0,05). H. musciformis e S. filiformis (Rhodophyta) tiveram os maiores conteúdos de cinza (14,14 ± 1,23-15,12 ± 0,51 g 100 g -1 p.d.), enquanto as espécies Caulerpa (Chlorophyta) foram para lipídio (1,52 ± 0,17-3,77 ± 0,13 g 100 g -1 p.d.) (p < 0,05). Todas as espécies foram fontes maiores em proteína e carboidrato. Portanto, as algas marinhas estudadas poderiam ser uma fonte de ingrediente alimentar potencial para dietas.Palavras-chave: macroalgas marinhas, componentes químicos, determinação proximal. 138Carneiro et al.

<b>Optimized acid hydrolysis of the polysaccharides from the seaweed <i>Solieria filiformis</i> (Kützing) P.W. Gabrielson for bioethanol production

“…The agarophyte seaweeds Gracilaria cervicornis (63.1%) and Gelidium amansii (67.3%) also presented high carbohydrate content (Marinho-Soriano, Fonseca, Carneiro, & Moreira, 2006;Park et al, 2012). However, the biochemical composition of the S. filiformis, showed in the corrent work, was different of the related in literature (Carneiro, Rodrigues, Teles, Cavalcante, & Benevides, 2014 filiformis was selected as the biomass for ethanol production in this study because there is potential for a mariculture system and it grows in a tropical sea, according to results obtained by our research group.…”

“…Assessment of the moisture and ash content was performed according to the Association of Official Analytical Chemists (Association of Official Analytical Chemists [AOAC], 2000). Crude lipids were extracted from the powdered dried seaweed using Soxhlet apparatus and ethanol as solvent.…”

Molecular characteristics of polysulfated fractions from the green seaweed <i>Caulerpa cupressoides</i> and actions on thrombin generation <i>in vitro

“…In plastic bags, they were taken to the Carbohydrate and Lectins Laboratory, Department of Biochemistry and Molecular Biology, Universidade Federal do Ceará (UFC), Brazil. After transportation, macroscopic epiphytes were removed from the specimens, followed by extensive washing with distilled water and storing at -20°C (Carneiro et al, 2014). Species was identified by PhD.…”

“…Caulerpa cupressoides var. lycopodium (Vahl) C. Agardh is a particularly interesting benthic species of green seaweed endemic to the Ceará coast, Brazil, having nutritional value (Carneiro, Rodrigues, Teles, Cavalcante, & Benevides, 2014) and metabolites-derived physiological effects (Vanderlei et al, 2010;Rivanor et al, 2014;Wang et al, 2014). Studies performed by Rodrigues et al (2011a), Rodrigues, Quinderé, Queiroz, Coura, and Benevides (2012a), Rodrigues et al (2014a) isolated and partially characterized three SPs fractions (-SP1, -SP2 and Cc-SP3), of which only Cc-SP2 showed sulfation-dependent anticoagulant effect vs. UHEP.…”

<b><i>In vitro</i> inactivation of thrombin generation by polysulfated fractions isolated from the tropical coenocytic green seaweed <i>Caulerpa racemosa</i> (Caulerpaceae, Bryopsidales)

“…Seaweeds have structurally diverse unique chemicals (e.g., proteins, carbohydrates and lipids) (Carneiro, Rodrigues, Teles, Calvacante, & Benevides, 2014) with industrial relevance and benefits to human and animal health (Costa-Lotufo et al, 2006) as potentially useful ingredients in cosmetics (Cardozo et al, 2007), aquaculture (Rodrigues, Júnior, Lourenço, Lima & Farias, 2009), nutrition (Carneiro et al, 2014) and biomedicine (Pomin, 2012;Mourão, 2015). Of all algae products, extracellular matrix sulfated polysaccharides (SPs) comprise a diverse group of biomaterials exhibiting high degree of sulfation (S=O, sulfate radicals) and molecular distribution of more than 100 kDa, which are capable of displaying anticoagulant, antithrombotic and anti-inflammatory effects (Pomin, 2012;Mourão, 2015;Rodrigues et al, 2012a;Rodrigues et al, 2016).…”