Biochemical study of attached macroalgae from the Madeira Archipelago and beach-cast macroalgae from the Canary Islands: multivariate analysis to determine bioresource potential

2020 ◽  
Vol 63 (3) ◽  
pp. 283-298
Author(s):  
Nuno Nunes ◽  
Sofia Valente ◽  
Sónia Ferraz ◽  
Maria Carmo Barreto ◽  
Miguel A.A. Pinheiro de Carvalho
Keyword(s):  
Biochemical Study ◽  
Algal Species ◽  
Biochemical Properties ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
The North ◽  
Madeira Archipelago ◽  
Total Carbohydrates ◽  
Beach Cast

AbstractFifteen attached macroalgae from the Madeira Archipelago, comprising three green, three red and nine brown algal species, as well as two beach-cast macroalgal samples, collected along the north shore of Gran Canaria, were assessed for their biochemical properties. The analysis included the determination of total minerals, total carbohydrates, protein, lipids, chlorophyll a, total carotenoids, total phenolic content, fucoxanthin and phycobilins (allophycocyanin, phycocyanin and phycoerythrin). The results showed a high variability of biochemical composition, allowing for the targetting of specific bioresources for particular purposes, including functional foods. This work provides the foundation for a biorefinery strategy implementation plan, for which specific macroalgae may be targeted for valuable and beneficial compounds.

scholarly journals Biocompounds Content Prediction in Ecuadorian Fruits Using a Mathematical Model

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 284 ◽  
Author(s):  
Wilma Llerena ◽  
Iván Samaniego ◽  
Ignacio Angós ◽  
Beatriz Brito ◽  
Bladimir Ortiz ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
Physalis Peruviana ◽  
Yellow Orange ◽  
Total Anthocyanins ◽  
The Mathematical Model ◽  
Complex Methods ◽  
Solanum Betaceum

Anthocyanins, carotenoids and polyphenols are biomolecules that give the characteristic color to fruits. Carotenoids relate to yellow, orange and red colors whereas anthocyanins and polyphenols mainly relate to purple and red colors. Presently, standard determination of antioxidants is carried out using relatively complex methods and techniques. The aim of this study was to develop a mathematical prediction model to relate the internal color parameters of the Amazonic fruits araza (Eugenia stipitata Mc Vaugh), Andean fruit blackberry (Rubus glaucus Benth), Andean blueberry (Vaccinium floribundum Kunth), goldenberry (Physalis peruviana L.), naranjilla (Solanum quitoense Lam.), and tamarillo (Solanum betaceum Cav.) to their respective anthocyanins, carotenoids and polyphenols contents. The mathematical model was effective in predicting the total anthocyanins content (TAC), the total carotenoids content (TCC) and finally the total phenolic content (TPC) of fruits assayed. Andean blueberry presented a TPC with an experimental value of 7254.62 (mg GAE/100 g sample) with respect to a TPC prediction value of 7315.73 (mg GAE/100 g sample). Andean blackberry presented a TAC with an experimental value of 1416.69 (mg chloride cyanidin 3-glucoside/100 g) with respect to a prediction TAC value of 1413 (mg chloride cyanidin 3-glucoside/100 g).

scholarly journals Nutrients and bioactive compounds of pulp, peel and seed from umbu fruit

2019 ◽  
Vol 49 (4) ◽  
Author(s):  
Leilson de Oliveira Ribeiro ◽  
Eliseth de Souza Viana ◽  
Ronoel Luiz de Oliveira Godoy ◽  
Sidinea Cordeiro de Freitas ◽  
Suely Pereira Freitas ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Bioactive Compounds ◽  
Nutritional Composition ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
Fresh Pulp ◽  
Main Barrier ◽  
By Products

ABSTRACT: The objective of this research was to evaluate the nutritional composition and bioactive compounds of whole umbu fruit, including pulp, seed and peel, and also of a commercial umbu pulp. Samples of the fractions and of commercial pulp were analyzed for determination of minerals and proximate composition, total phenolic and antioxidant activity. Pulps and peel were also analyzed for vitamin C and carotenoids contents. Commercial pulp presented better nutritional composition than fresh pulp (P<0.05) and the peel presented higher phenolic content and antioxidant activity than seed. Peel also stood out by its vitamin C (79 mg.100 g-1) and total carotenoids (2,751 µg.100 g-1) contents, showing that, as the main barrier of the fruit for its protection, it is a fraction rich in bioactive compounds. The highest dietary fiber and iron contents were observed in umbu seed (P<0.05). Therefore, umbu by-products may be ingredients proper for development of food richer in nutrients and bioactive compounds.

scholarly journals Antioxidant Capacity of Dark Red Corn � Biochemical Properties Coupled with Electrochemical Evaluation

2020 ◽  
Vol 71 (6) ◽  
pp. 31-41
Author(s):  
Maja Stevanovic ◽  
Sanja Stevanovic ◽  
Marija Mihailovic ◽  
Biljana Kiprovski ◽  
Goran Bekavac ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Antioxidant Properties ◽  
Biochemical Properties ◽  
Total Phenolic ◽  
Electrochemical Approach ◽  
High Antioxidant Activity ◽  
Corrosion Inhibition Efficiency ◽  
Cv Measurements ◽  
Phenolic And Flavonoid

Biochemistry coupled with electrochemical approach is employed in a fast, relatively simple, yet highly precise detection of a plant extract antioxidant properties. Antioxidant capacity of dark red corn grains was investigated electrochemically using cyclic voltammetry (CV) on glassy carbon electrode (GC). The linear polarization resistance (LPR) measurements were performed for examining the corrosion inhibitive behavior of polyphenolics on mild steel. The consistent positive correlation (r=0.99) was established between total phenolic and flavonoid contents obtained by CV measurements and spectrophotometric antioxidant assay (DPPH test). Both analyses confirm the high antioxidant activity of tested pigments. Determination of the corrosion inhibition efficiency revealed that the red corn pigments have anti-corrosion effect on mild steels.

scholarly journals Biochemical Study of Wild and Cultivated Blackcurrant (Ribes nigrum L.) berries

2021 ◽  
Vol 31 (3) ◽  
pp. 180-185
Author(s):  
Odonchimeg Munkhjargal ◽  
Munkhtsetseg Byambaa ◽  
Mungunnaran Damdindorj ◽  
Bayarmaa Barkhuu
Keyword(s):  
Vitamin C ◽  
Biochemical Study ◽  
Antioxidant Properties ◽  
Biochemical Properties ◽  
Biologically Active ◽  
Total Flavonoids ◽  
Total Phenols ◽  
Ribes Nigrum ◽  
Total Carbohydrates ◽  
Simple Carbohydrates

From over 150 species of berries belong to family Grossulariceae and genus Ribes, blackcurrants (Ribesnigrum L.) arewidely used, yet most beneficial berries in traditional medicine as well as in food. Blackcurrant berries known for not only for their extended storage of Vitamin C, but also high content of biologically active ingredients. Vitamin C stored in blackcurrant berries is relatively stable, does not get degraded during plantation, supports immune system, and has detoxicant and antioxidant properties. In this research we studied certain biochemical properties of cultivated, and blackcurrant berries grown in wild. We determined total carbohydrates 13.6-15.8%, simple carbohydrates 10.8-11.9%, total phenols 339.2-514.4 mg/g, total flavonoids 105.0-320.0 mg/g, and vitamin C 239-305 mg/% contained in cultivated, as well in wild blackcurrant berries. These results demonstrate the feasibility of producing all-natural biologically active compounds that support health from juices of both cultivated, and wild blackcurrant berries. Зэрлэг болон таримал үхэр нүд (Ribes nigrum l.) жимсний биохимийн судалгаа Үхэр нүд  (Ribesnigrum L.) жимс нь Сэрдэгийн  овог, Тошлойн төрөлд хамаарах 150 гаруй зүйлээс уламжлалт анагаах ухаан  болон хүнсэнд өргөн ашиглагддаг чанараараа хамгийн их ач холбогдолтой жимсний нэг юм.  Үхрийн нүд жимс нь маш урт хугацааны туршид витамин С-гийн баялаг эх сурвалж гэдгээрээ танигдсанаас гадна, биологийн идэвхт бодисыг өндөр тунгаар агуулдаг. Түүнд агуулагдах витамин С нь харьцангуй тогтвортой ба ургалтын явцад задардаггүй онцлогтой бөгөөд  дархлаа дэмжих, биеийг хоргүйжүүлэх болон антиоксидант үйлдэлтэй. Энэхүү судалгаагаар тарималжуулсан  үхэр нүд жимсний биохимийн бүрдлийг байгалийн  зэрлэг жимстэй харьцуулан судлав. Судалгааны үр дүнд таримал болон зэрлэг үхэр нүд жимсэнд нийт нүүрсус 13.6-15.8%, энгийн нүүрсус 10.8-11.9%, нийт фенолт нэгдэл 339.2- 514.4 мг/г, нийлбэр флавоноид 105.00-320.0мг/г тус тусагуулагдаж байгааг тодорхойллоо. Витамин С, В1, В6,органик хүчлийн агууламжийг өндөр мэдрэмжит шингэний хроматограф (HPLC)-ын багажийг ашиглан тодорхойлов.  Түлхүүр үг: Ribes nigrum L, жимс жимсгэнэ, антиоксидант, флавоноид,

scholarly journals Determination of antioxidative and enzymatic activity in green and red lettuce cultivars affected by microbiological fertilisers and seasons

2021 ◽  
pp. 101
Author(s):  
Milica Stojanović ◽  
Vuk Maksimović ◽  
Dragosav Mutavdžić ◽  
Ivana Petrović ◽  
Zorica Jovanović ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Quality Parameters ◽  
Total Phenolic ◽  
Fresh Weight ◽  
Total Carotenoids ◽  
Total Antioxidant

Lettuce is a worldwide grown leafy vegetable rich in phytochemicals which are essential in human diet. The aim of this study was to examine the effect of genotype, microbiological fertilisers and season on the rosette fresh weight and components of antioxidant activity. Six cultivars (green ‘Kiribati’, ‘Aleppo’, ‘Aquino’ and red ‘Murai’, ‘Carmesi’, ‘Gaugin’) were grown in a greenhouse experiment during three consecutive seasons (autumn, winter and spring) with application of microbiological fertilisers (EM Aktiv, Vital Tricho and their combination). Green cultivars showed higher fresh weight than red in spring and winter. Green cultivar ‘Aleppo’ showed the highest fresh weight in control during spring. Microbiological fertilisers led to increased fresh weight in autumn. Mainly, red cultivars showed higher quality parameters compared to green (total antioxidant capacity, total phenolic content, total carotenoids and POD activity). Red cultivar ‘Carmesi’ showed the highest total antioxidant capacity, total carotenoids, and total phenolic content in winter with combination of fertilisers, Vital Tricho, and in control. In spring, ‘Carmesi’ and ‘Gaugin’ showed the highest POD activity with Vital Tricho, and combination of fertilisers. The present study suggested that genotype, fertilisers and season jointly influenced quantity and quality parameters with emphasis on Vital Tricho, and/or combination of fertilisers.

scholarly journals Efficacy of Methylobacterium oryzae Supplemented Sargassum wightii Seaweed Liquid Fertilizer on Chilly and Tomato Plant Growth

2020 ◽  
Author(s):  
Athiappan Murugan ◽  
Anandan Rubavathi ◽  
Kannan Visali ◽  
Vijayasingh Neginah
Keyword(s):  
Methanolic Extract ◽  
Crop Productivity ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
Liquid Fertilizer ◽  
Sargassum Wightii ◽  
Total Carbohydrates ◽  
The Impact ◽  
Seaweed Liquid Fertilizer ◽  
Methylobacterium Oryzae

AbstractLiquid seaweed fertilizer gaining interest due to their use in crop productivity. The present study was designed to evaluate the impact of Methylobacterium oryzae amended liquid seaweed fertilizer on domestic plants like chilly and tomato. The Sargassum wightii methanolic extract was maximum (137 mg/g) among other solvent tested. Extract showed 0.456mg/mL, 1.587 mg/mL, 0.78 mg/g, 5.27 mg/g, 0.63 mg/mL, 0.98 mg/mL, 0.285 g/mL and 0.546 μg/mL of total phenolic, total flavonoids, total chlorophyll, total carotenoids, total protein, total carbohydrates, total lipids and total aminoacids respectively. The maximum survival of Methylobacterium oryzae was observed at 40 % of Sargassum wightii SLF extract with 3% Methylobacterium oryzae culture concentration and has viability of 750 × 106 CFU/l after 6 months. Impact of foliar sprayed liquid fertilizer on the chlorophyll, internode and shoot length had been promising over seed soaked.

Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

2020 ◽  
Vol 33 ◽  
pp. 15
Author(s):  
Roi Martínez-Escauriaza ◽  
Claudio Vieira ◽  
Lídia Gouveia ◽  
Nuno Gouveia ◽  
Margarida Hermida
Keyword(s):  
Fish Species ◽  
Young Men ◽  
Coastal Areas ◽  
Teleost Fishes ◽  
The North ◽  
Southeast Coast ◽  
Madeira Archipelago ◽  
First Time

Data obtained from licenses of spearfishers and surveys conducted in 2004 and 2017 allowed for the analysis, for the first time, of the practice of spearfishing in the Madeira archipelago. Only a small percentage of the population practices spearfishing, mostly local young men. Most of them practice the activity with a partner throughout most of the year and along most of the island's coastal areas, although preferentially along the North and Southeast coast. Results show how, in recent years, despite the population of spearfishers decreasing, the abundance in the annual catch potentially increased, probably due to the higher investment of time in this activity. It has been observed that many fishers complement their catches with manual collecting of invertebrates. Overall, 40 teleost fishes and also 4 crustaceans and 8 molluscs were identified. The most frequently captured fish species were parrotfish and white seabream, while limpets were the most collected invertebrates in both selected periods.

The New Swedish Cyprus Expedition 2010. Excavations at Dromolaxia Vizatzia/Hala Sultan Tekke. Preliminary results

2011 ◽  
Vol 4 ◽  
pp. 69-98 ◽  
Author(s):  
Peter M. Fischer ◽  
Patrik Klingborg ◽  
Fanny Kärfve ◽  
Fredrika Kärfve ◽  
C. Hagberg ◽  
...  
Keyword(s):  
Ground Penetrating Radar ◽  
Main Task ◽  
Phase 2 ◽  
The North ◽  
12Th Century ◽  
Area 6 ◽  
Recent Phase ◽  
The Rich ◽  
Ground Penetrating

Determination of the complete occupational sequence of the site, including investigation of pre-12th century levels which were thoroughly studied by P. Åström since the 1970s, is the main task of the planned project. During the course of the expedition (NSCE11) in spring 2010 a ground-penetrating radar survey (GPR) was carried out at Dromolaxia Vizatzia/Hala Sultan Tekke in Area 6, leading to the discovery of a large Late Cypriote complex. The compound is bordered to the north by a substantial wall, against which nine rooms (so far) could be exposed. Two occupational phases have been verified but there are indications of a third. The suggested functions of the various structures of the most recent phase are: living, working, storage and administration spaces. The rich find contexts point to the production of textiles and metal objects, and the locally produced pottery is generally of a high quality. There are also many imports, mainly from the Mycenaean sphere of culture. The locally produced vessels from Phase 2 include the “Creature krater” which is a masterpiece of a high artistic standard. Another piece of elevated artistry is the piece of a “Warrior vase”.

The Comparative Study of Equisetum pratense, E. sylvaticum, E. telmateia: Accumulation of Silicon, Antioxidant and Antimicrobial Screening

2019 ◽  
Vol 70 (7) ◽  
pp. 2519-2523
Author(s):  
Denisa Batir Marin ◽  
Oana Cioanca ◽  
Mihai Apostu ◽  
Cristina Gabriela Tuchilus ◽  
Cornelia Mircea ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Methanol Extract ◽  
Previous Treatment ◽  
Total Phenolic ◽  
Quantitative Chemical Analysis ◽  
Qualitative And Quantitative ◽  
Antioxidant And Antimicrobial Activity ◽  
The Comparative Study

The objective of the current study is represented by the determination of silica and a phytochemical screening of phenolic derivates of some Equisetum species. The antioxidant and antimicrobial activity for Equisetum pratense Ehrh.,, Equisetum sylvaticum L. and Equisetum telmateia Ehrh. (sin. Equisetum maximum Lam.) were also investigated. The concentration of silicon (Si) in plants was determined by the spectrophotometric method using previous treatment with NaOH 50% both for the stem and the nodal branches [1]. Results obtained varied from 95.12 to 162.10 SiO2 mg/g dry plant which represents 4.44% to 7.58% Si/100g dry sample. Two types of total extracts were obtained using different solvents and were subjected to qualitative and quantitative chemical analysis considering total phenolic content [2]. The highest concentration of investigated compounds was found in the methanolic extract, E. sylvaticum, 196.5mg/g dry sample. Antioxidant activity was monitored spectrophotometrically and expressed in terms of IC50 (�g/mL) [3]. Values gathered ranged from 261.7 to 429.5 �g/mL. The highest capacity to neutralized DPPH radicals was found in E. sylvaticum. In vitro antimicrobial activity was determined using difusimetric method [4]. Testing was performed on four microorganisms: three strains of bacteria and one species of fungi. Different effects were noticed against the bacteria, furthermore the methanol extract appeared to be most efficient. All extracts showed significand antimicrobial activity against Staphylococcus aureus (ATCC 25923) and Candida albicans (ATCC 90028) and weak to no activity against Pseudomonas aeruginosa (ATCC 27853) and Escherichia coli (ATCC 25922).

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