Handbook of Food Analytical Chemistry

Wrolstad, Ronald E.; Acree, Terry E.; Decker, Eric A.; Penner, Michael H.; Reid, David; Schwartz, Steven J.; Shoemaker, Charles F.; Smith, D.H.; Sporns, Peter

doi:10.1002/0471709085

Cited by 172 publications

(160 citation statements)

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“…Coffee oil consists primarily of triglycerides, diglycerides, monoglycerides and FFAs that combined account for 85-90% of the total lipid content and are principally composed of linoleic, palmitic, oleic and stearic acids in decreasing order of magnitude and in proportions not unlike those found in other common edible vegetable oils [6,11,13,16,19]. The FA composition of the extracted oil is significant as it affects the properties of the derived FAMEs, while the presence of FFAs is a major factor affecting the potential for efficient further processing into biodiesel as high FFA levels increase susceptibility to oxidation, speed up degradation and inhibit alkaline catalyzed transesterification [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Efthymiopoulos

Hellier

Ladommatos

et al. 2017

Waste Biomass Valor

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Spent coffee grounds (SCG) are a potentially valuable source of lipids for sustainable production of biofuels. However, there are several feedstock properties and solvent extraction parameters that can impact on the oil yield and quality, potentially reducing the possible environmental benefits of deriving oils from this waste stream. This study presents results of laboratory and pilot plant scale experimental investigations into lipid recovery from spent coffee, determining the effects of solvent extraction variables including duration, SCG-to-solvent ratio and SCG residual moisture. SCG samples from both the industrial production of instant coffee and retail coffee shops were characterized in terms of moisture content, particle size distribution and oil content to identify the impact of these variables on the efficiency of lipid recovery by solvent extraction. The dry weight oil content of the instant SCG samples ranged from 24.2 to 30.4% w/w, while the retail SCG samples contained considerably lower amounts of lipids with their oil content ranging between 13.4 and 14.8% w/w. The highest oil yields were found at an extraction duration of 8 h, while a moisture content of ~2% w/w led to increased yields relative to completely dry samples. A pattern of increasing acidity with decreasing extraction duration was observed, suggesting preferential extraction of free fatty acids (FFA), with the fatty acid (FA) profile of the oil found to be similar to lipids commonly utilized for biofuel production.

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Section: Introductionmentioning

confidence: 99%

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Efthymiopoulos

Hellier

Ladommatos

et al. 2017

Waste Biomass Valor

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“…Moisture content was determined by drying the EBN sample in an oven at 105 until a constant weight was obtained (Saengkrajang, Matan & Matan, 2013). Fat content was calculated from a fraction of lipid extracted from the hydrolysed EBN sample (Wrolstad et al, 2005). Fibre was determined after digesting a known weight of a fat-free sample in refluxing 1.25% sulfuric acid and 1.25% sodium hydroxide (Saengkrajang, Matan & Matan, 2013).…”

Section: Determination Of Pc CC and Sacmentioning

confidence: 99%

A rapid and nondestructive method to determine the distribution map of protein, carbohydrate and sialic acid on Edible bird’s nest by hyper-spectral imaging and chemometrics

Shi

Zhang

et al. 2017

Food Chemistry

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A rapid and nondestructive method to determine the distribution map of protein, carbohydrate and sialic acid on Edible bird s nest by hyper-spectral imaging and chemometrics, Food Chemistry (2017), doi: http://dx.doi.org/10.1016/j.foodchem. 2017.02.075 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…Suspensions were centrifuged for 15 min at 3,500 rpm/min. Concentration of soluble proteins in supernatants were determined by Biuret method [28] using bovine serum albumin as standard.…”

Section: Proximate Analysesmentioning

confidence: 99%

“…Prepared protein suspensions were mixed by shaker during 1 h. Suspensions were centrifuged for 30 min at 3,500g. Concentration of soluble proteins were determined in the supernatant by Biuret method [28] using bovine serum albumin as standard.…”

Section: Determination Of Proteins Functional Propertiesmentioning

confidence: 99%

Comparison of biological value and technological properties of oil seed proteins

Nosenko¹

2017

Ukr. food j.

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Introduction. The objective of this work was comparative analysis of protein properties of main oil seeds, cultivated in Ukraine, notably rape, sunflower and soy.. Materials and methods.Tetrachimena piriformis (WH-14 strain) cultures were used for the determination of relative nutritive value and toxicity of the protein products. The emulsifying capacity of seed proteins were determined as maximum volumes of emulsified oil relatively to 1 g of proteins and foaming capacity as volume of foam, obtained at standard conditions relative to volume of protein suspension.Results and discussion. According to our data biological value of soy proteins were limited by sulfur containing amino acid methionin and cystin (2,1% from common amino acid content). There total content was only about 60% of FAO/WHO scale. Biological value of sunflower proteins was limited by three amino acidssulfur containing amino acids (1,6% of methionine and cysteine) and lysine (3,0% from common amino acid content). The contents of majority of indispensable amino acids in rape proteins are 8-57% higher than FAO/WHO scale. The exception are valin and isoleycin with 80-85% content. Score of sulfur containing amino acid was 157,1% from FAO/WHO scale. Isolated rape proteins had highest technological properties, their solubilities were 16,4 to 38,6% at different pH, water holding capacity − 211 %, oil binding capacity − 130 %, emulsifying capacity − 140 ml/g, and foaming capacity -122 %.Conclusions. Investigated protein isolates of oil seeds (soy, sunflower and rape) had no toxicity. Rape proteins isolate had the highest relative biological value and technological properties.

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Handbook of Food Analytical Chemistry

Cited by 172 publications

References 0 publications

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

A rapid and nondestructive method to determine the distribution map of protein, carbohydrate and sialic acid on Edible bird’s nest by hyper-spectral imaging and chemometrics

Comparison of biological value and technological properties of oil seed proteins

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