Olive stone an attractive source of bioactive and valuable compounds

Rodríguez, Guillermo; Lama, Antonio; Rodríguez, Rafael Moreno; Jiménez, Ana; Guillén, Rafael; Fernández‐Bolaños, Juan

doi:10.1016/j.biortech.2007.11.027

Cited by 307 publications

(196 citation statements)

References 55 publications

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“…As was expected, the percentage of solid with a size lower than 4 mm was higher in SET than in ST, and in treatments with higher temperatures. However, the hardness of pieces with size higher than 4 mm was lower in the ST reactor which implies an advantage in the milling of the recovered solid and, therefore, promotes its use as active carbon, animal feeding, abrasive or in cosmetic formulations as an exfoliating agent (Al-Muhtaseb, 2010;Rodríguez et al, 2008). FCs from both reactors showed significant differences in composition (Table 3).…”

Section: Comparative Study Between Reactorsmentioning

confidence: 99%

Valorization of Tunisian secondary date varieties (Phoenix dactylifera L.) by hydrothermal treatments: New fiber concentrates with antioxidant properties

Mrabet

Rodríguez-Gutiérrez

Guillén

et al. 2015

LWT - Food Science and Technology

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a b s t r a c tTwo hydrothermal treatments were assayed on secondary date varieties from the Tunisian coastal oasis in order to obtain valuable solid extracts, rich in dietary fiber and antioxidants. The steam explosion treatment (SET) is based on high temperatures and pressures, with an explosive decompression. The steam treatment (ST), without rapid decompression, has lower pressures and temperatures, but longer treatments than SET. The recovery of the fiber concentrates (FCs) was very similar for the different assayed conditions. Only its granulometry showed differences, increasing the fraction with size lower than 4 mm in more intense treatments. Treatment conditions had higher influence than date variety in the FCs chemical composition. It was approximately 0.1e2% soluble sugar, 0.7e2% uronic acids, 4e8% phenols, 5e11% fat, 5e22% non-cellulosic sugars, 9e14% protein, 12e20% cellulose, and 44e71% lignin, depending on treatment conditions. They had also very high antiradical activity (230e580 mmols Trolox/ Kg FC). The use of ST reactor is highly recommended because it could be easily scaled up to the industry. The FC obtained by hydrothermal treatments from date fruits could be considered as a very interesting ingredient for healthier food, especially for bakery or dairy products due to its pleasant chocolate/coffee flavor.

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Section: Comparative Study Between Reactorsmentioning

confidence: 99%

Valorization of Tunisian secondary date varieties (Phoenix dactylifera L.) by hydrothermal treatments: New fiber concentrates with antioxidant properties

Mrabet

Rodríguez-Gutiérrez

Guillén

et al. 2015

LWT - Food Science and Technology

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“…A recent study has shown the possibility to use olive stones in particle board panels (El Bir et al 2012). As a lignocellulosic material, the hemicellulose, cellulose and lignin are the main components of olive stone as well as protein, fat, free sugars and polyols (Fernández-Bolãnos et al 1999, Fernández-Bolãnos et al 2001, Rodríguez et al 2008, Román et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Characterization of phenolic compounds in olive stones of three moroccan varieties

Elbir

Es‐Safi

Amhoud

et al. 2015

Maderas, Cienc. tecnol.

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Phenolic compounds have a fundamental importance in the nutritional and sensorial characteristics of olive. In this study phenolic compounds extracted from olive fruit stones of three Moroccan registered cultivars were analyzed. The obtained results showed that the total amount of phenolic compounds varied according to the olive variety. The stones of the Moroccan Picholine variety were the richest in total phenolic compounds (11,32 mg of gallic acid equivalent (GAE)/g of dry weight (DW)) followed by Haouzia (4,55 mg GAE/g DW) and Menara (3,56 mg GAE/g DW). The qualitative analysis showed that the analyzed extracts were predominated by nuzhenide and its derivatives. Thus nuzhenide was observed among the major compound in the three studied cultivars. Its mono, di and tri 11-methyl oleoside adducts were also detected. Various compounds with the same molecular weight values and corresponding to nuzhenide or its derivatives were detected indicating the presence of various isomers.

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“…Therefore, social benefits of alleviating energy poverty must be weighed against such technical costs to fully gauge sustainability. Longer term, an ideal characteristic of an energy product is the ability for transportation and storage, such as a liquid transportation fuel and bioproducts such as furfural, plastic filler, abrasives, catalysts or resins (42), but these products remain under development. Socioenvironmental.…”

mentioning

confidence: 99%

Global bioenergy potential from high-lignin agricultural residue

Mendu¹,

Shearin²,

Campbell

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

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Almost one-quarter of the world's population has basic energy needs that are not being met. Efforts to increase renewable energy resources in developing countries where per capita energy availability is low are needed. Herein, we examine integrated dual use farming for sustained food security and agro-bioenergy development. Many nonedible crop residues are used for animal feed or reincorporated into the soil to maintain fertility. By contrast, drupe endocarp biomass represents a high-lignin feedstock that is a waste stream from food crops, such as coconut (Cocos nucifera) shell, which is nonedible, not of use for livestock feed, and not reintegrated into soil in an agricultural setting. Because of highlignin content, endocarp biomass has optimal energy-to-weight returns, applicable to small-scale gasification for bioelectricity. Using spatial datasets for 12 principal drupe commodity groups that have notable endocarp byproduct, we examine both their potential energy contribution by decentralized gasification and relationship to regions of energy poverty. Globally, between 24 million and 31 million tons of drupe endocarp biomass is available per year, primarily driven by coconut production. Endocarp biomass used in small-scale decentralized gasification systems (15-40% efficiency) could contribute to the total energy requirement of several countries, the highest being Sri Lanka (8-30%) followed by Philippines (7-25%), Indonesia (4-13%), and India (1-3%). While representing a modest gain in global energy resources, mitigating energy poverty via decentralized renewable energy sources is proposed for rural communities in developing countries, where the greatest disparity between societal allowances exist.

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Olive stone an attractive source of bioactive and valuable compounds

Cited by 307 publications

References 55 publications

Valorization of Tunisian secondary date varieties (Phoenix dactylifera L.) by hydrothermal treatments: New fiber concentrates with antioxidant properties

Valorization of Tunisian secondary date varieties (Phoenix dactylifera L.) by hydrothermal treatments: New fiber concentrates with antioxidant properties

Characterization of phenolic compounds in olive stones of three moroccan varieties

Global bioenergy potential from high-lignin agricultural residue

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