Enhancing the recovery of tiger nut (Cyperus esculentus) oil by mechanical pressing: Moisture content, particle size, high pressure and enzymatic pre-treatment effects

Ezeh, Onyinye; Gordon, Michael H.; Niranjan, Keshavan

doi:10.1016/j.foodchem.2015.07.151

Cited by 70 publications

(44 citation statements)

References 33 publications

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“…The total tocopherols of the oil samples in this study were determined using an high‐performance liquid chromatography‐ultraviolet (HPLC‐UV) system (Agilent 1200, Manchester, UK) following the method used by Ezeh et al . (2016) and Costa et al . (2010) with slight modifications.…”

Section: Methodsmentioning

confidence: 96%

“…The fatty acid composition (FAC) of MO oil was determined using the method described by Ezeh et al . (2016), with slight modifications. Gas chromatography (GC, Agilent HP 6890) fitted with flame ionization detector (FID) was used for the analysis, with a Varian CP‐Sil 88 fused silica capillary column (60 m × 0.25 mm × 0.20 μm) and helium as a carrier gas (flowrate 1.0 mL min −1 ).…”

Section: Methodsmentioning

confidence: 99%

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Oxidative properties of Moringa oleifera kernel oil from different extraction methods during storage

et al. 2019

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BACKGROUND: Moringa oleifera (MO) kernel oil is categorized as a high-oleic oil that resembles olive oil. However, unlike olive trees, MO trees are largely present in most subtropical and tropical countries. In these countries, therefore, the benefits of oleic acid can be obtained at a cheaper price through the consumption of MO kernel oil. This study reports on the effect of different extraction methods on oxidative properties of MO kernel oil during storage for 140 days at 13, 25, and 37 ∘ C. RESULTS: All aqueous enzymatic extraction (AEE)-based methods generally resulted in oil with better oxidative properties and higher tocopherol retention than the use of solvent. Prior to AEE, boiling pre-treatment deactivated the hydrolytic enzymes and preserved the oil's quality. In contrast, high-pressure processing (HPP) pre-treatment accelerated hydrolytic reaction and resulted in an increase in free fatty acids after 140 days at all temperatures. No significant changes were detected in the oils' iodine values and fatty acid composition. The tocopherol content decreased significantly at both 13 and 25 ∘ C after 60 days in the oil from SE method, and after 120 days in oils from AEE-based methods.CONCLUSION: These findings are significant in highlighting the extraction methods resulting in crude MO kernel oil with greatest oxidative stability in the storage conditions tested. Subsequently, the suitable storage condition of the oil prior to refining can be determined. Further studies are recommended in determining the suitable refining processes and parameters for the MO kernel oil prior to application in variety food products. Aqueous enzymatic extraction with high pressure processing pre-treatment (HPP-AEE)The ground-sieved MO kernels were mixed with distilled water at a 1:1 (w/w) ratio and vacuum sealed in polyethylene bags. According to Mat Yusoff et al. (2017), 21 some preliminary tests were carried out to determine the solid-to-liquid ratio. The use of a smaller amount of water caused the formation of a very thick paste, which adhered to the polyester bag, thus wasting some of the sample. The addition of a higher water content resulted in a very dilute mixture, which thus allowed only a small amount of ground-sieved MO kernel to be processed at one time.The mixtures at 1:1 (w/w) ratio were treated with high pressure (Stansted Fluid Powder Ltd, Stansted, UK) at 50 MPa and 60 ∘ C for 35 min, followed by addition of distilled water up to 4:1 water / kernel (w/w) ratio for the subsequent AEE, as in the earlier section. The recovery of the free oil is explained in the next section.

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Section: Methodsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Oxidative properties of Moringa oleifera kernel oil from different extraction methods during storage

et al. 2019

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“…For instance, Jung & Mahfuz (2009) stated that the use of HPP at 200 MPa and 500 MPa, followed by AEE (protease enzyme), resulted in 3.20% and 1.30% (w/w) higher soybean oil yield, respectively, under otherwise identical conditions. In the case of tiger nuts on the other hand, Ezeh et al (2016) reported no significant difference in the oil yield from an AEE alone and from AEE with HPP pre-treatment at 50-700 MPa. It was reported that the parenchyma cells of the tubers exhibit cross linking of diferulic acid with arabinoxylans which contribute to its tough texture, even tougher than potatoes (Parker et al, 2000), thus the tuber's cells were not affected by the HPP pre-treatment.…”

Section: Introductionmentioning

confidence: 91%

High pressure pre-treatment of Moringa oleifera seed kernels prior to aqueous enzymatic oil extraction

Yusoff

Gordon

Ezeh

et al. 2017

Innovative Food Science & Emerging Technologies

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High pressure processing (HPP) was applied as a pre-treatment on Moringa oleifera (MO) kernels, for the first time, prior to aqueous enzymatic extraction (AEE) of the MO oil, and the effect of this pre-treatment is reported in terms of the free oil recovery and the nature of the cream emulsions formed. The HPP pre-treatments (50-250 MPa, 20-60 ⁰C, 10-60 min) generally resulted in higher free oil recoveries and thinner emulsion layers from ground-sieved kernels than the whole kernels. Optimization of the HPP parameters indicated linear increment in free oil recovery with increase in temperature and time, but not the pressure level. Without the pre-boiling step in the AEE process, the use of HPP pre-treatment at 50 MPa and 60 ⁰C for 35 min resulted in approximately 73% (w/w) free oil recovery with thinner emulsion layer than the use of AEE alone. These findings highlighted the ability of HPP in altering the MO protein structure into a form of less emulsifying functional properties, thus further de-emulsification method may not be necessary.

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“…The chemical and physical composition, characteristics and physiochemical properties of Cyperus esculentus have been shown in the various literature (Ezeh et al 2016;Li et al 2017;Chinma et al 2009;Codina-Torrella et al 2015;Ocloo et al 2014). Lopéz-Cortés et al (2013) and Ezeh et al (2016) in their studies identified that Tiger nut has the capacity to provide good amounts of fatty acids. This property makes it a good lubricant additive in drilling fluids which helps to reduce friction generated during the drilling operations.…”

Section: Introductionmentioning

confidence: 99%

Cellulosic Cyperus esculentus L. as a filtrate loss modifier in field applicable aqueous and non-aqueous drilling fluids

Okoro

Igwilo

Ifeka

et al. 2018

J Petrol Explor Prod Technol

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The design and formulation of drilling fluids require additives that are cost-effective and environmental friendly in line with international best practices. This study was conducted to investigate the potentials and effects of Cyperus esculentus (Tiger Nut) as a filtrate loss modifier in field applicable aqueous and non-aqueous drilling fluids. Sixteen (eight aqueous and eight non-aqueous) drilling fluid systems were formulated, four aqueous and non-aqueous had Cyperus esculentus as a filtration additive, while the others do not contain the additive. The rheological properties, as well as the fluid filtration properties of the drilling muds, were investigated and compared with standard drilling mud. To ascertain validity, the results obtained were validated with the classic filtration model to ensure fit. Results obtained showed that the formulated mud systems had rheological properties that favored the suspension and transportation of drill cuttings, as well as the prevention of flocculation and clogging of drill strings. The rheological properties also showed a progressive trend as the concentrations of the additive were increased from 2 to 8 ppb. It was also further observed from the API and HPHT filter press test that the increase in the concentration of the additive exhibits a progressive trend that can be compared with the standard. In addition, it was observed from the classic filtration model that the experimental results from both mud systems were fit for the adopted model.

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Enhancing the recovery of tiger nut (Cyperus esculentus) oil by mechanical pressing: Moisture content, particle size, high pressure and enzymatic pre-treatment effects

Cited by 70 publications

References 33 publications

Oxidative properties of Moringa oleifera kernel oil from different extraction methods during storage

Oxidative properties of Moringa oleifera kernel oil from different extraction methods during storage

High pressure pre-treatment of Moringa oleifera seed kernels prior to aqueous enzymatic oil extraction

Cellulosic Cyperus esculentus L. as a filtrate loss modifier in field applicable aqueous and non-aqueous drilling fluids

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