Chemical composition and quality of date syrup as affected by pectinase/cellulase enzyme treatment

Al-Hooti, Suad; Sidhu, J. S.; Al-Saqer, Jameela M.; Al‐Othman, Amani

doi:10.1016/s0308-8146(02)00134-6

Cited by 96 publications

(57 citation statements)

References 2 publications

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“…The reason for the superior effect from media with date syrup at 6% was presumably that tissues would not need to expend energy to break down sucrose into monosaccharide. Suad-Al-Hooti et al [19] reported that glucose and fructose are the major sugars presented in date syrup and total sugar contents were reaching 88%. This is in accordance with findings that sucrose is degraded in to smaller units before uptake into cells in culture [20] .…”

Section: Resultsmentioning

confidence: 99%

Comparison Effects of Sucrose and Date Palm Syrup on Somatic Embryogenesis of Date Palm (Phoenix dactylifera L)

Al-Khateeb¹

2008

American J. of Biochemistry and Biotechnology

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Abstract:The effect of different concentration of date palm syrup (2, 4, 6, 8 and 10%) and sucrose at concentration of 30 and 60 g/l in addition to the control (without carbon source) on the micro propagation of date palm "cv. Suckary" were investigated. The results indicated that date syrup was taken up from the media as shown by the increase in total dry weight of culture. Addition of sucrose at 60 g/l produced the highest number of somatic embryos and longest shoot equal to that produced by date syrup at concentration of 6% without significant differences. On the other side, sucrose at 30 g/l improved the germination of somatic embryos followed by date syrup at 6%. Regarding fresh and dry weights, adding 6% date palm syrup was superior in this respect. Tissues grown on medium supplement with 10% of date syrup caused severe reduction in number of somatic embryo possibly due to the osmotic stress. In addition, tissues grown on medium containing 2% of date syrup had the lowest number of embryos. Date palm tissues are capable of utilizing date syrup as the sole carbon source for vegetative growth. It can be concluded that, adding date syrup locally known as 'Dibs' to the culture medium of date palm at concentration of 6% can be used totally as a replacement of sucrose which was the normally sugar used in most of plant tissue culture medium. This is the first report on the use of date syrup on somatic embryogenesis of date palm cv. Suckary.

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Section: Resultsmentioning

confidence: 99%

Comparison Effects of Sucrose and Date Palm Syrup on Somatic Embryogenesis of Date Palm (Phoenix dactylifera L)

Al-Khateeb¹

2008

American J. of Biochemistry and Biotechnology

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“…Les tronçons membranaires colmatés par le contact avec la boisson de dattes ont été observés par microscope électronique à balayage sur un appareil Philips XL30 après avoir subi une fixation chimique à la vapeur de glutaraldéhyde (1 %, v/v) pendant 5 min, un séchage au point critique du CO 2 [24]. Ce taux supé-rieur pourrait être dû à des facteurs environnementaux, au stade de maturation des dattes analysées et à certaines conditions de stockage.…”

Section: Visualisation Du Colmatageunclassified

“…Ces résultats sont comparables avec ceux rapportés dans la littérature pour d'autres varié-tés de dattes de qualité marchande [24][25][26][27]. L'altération sensorielle des dattes ne semble, donc, pas affecter leur valeur nutritionnelle.…”

Section: Visualisation Du Colmatageunclassified

Élaboration d’une boisson à partir d’écart de triage de dattes : clarification par traitement enzymatique et microfiltration

Cheikh-Rouhou

Baklouti²,

Hadj-Taieb³

et al. 2006

Fruits

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--Introduction. Despite their high nutritional value, by-products of dates are valueless in Tunisia, an important date-producing country. Our study aimed at testing a method for recovering these products by means of extraction, starting from a date paste, of a clarified drink. Materials and methods. The process of pulp extraction adopted was inspired by a traditional method. A rough solution obtained from the dilution of date paste was treated with enzymes (pectinases and cellulases) and by tangential microfiltration. The chemical composition, physico-chemical characteristics and rheological characteristics of the clarified drink obtained were determined. Results and discussion. The extracted rough solution has a high sugar content. The use of both microfiltration and enzymatic treatment resulted in a juice that has little acid content, with relatively low viscosity and turbidity and with a flow behaviour comparable to that of any other fruit juice. Conclusion. By-products of dates can be transformed, by the means of the usual processes, into a pleasant and marketable drink.

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“…Dates also have an emerging role of importance as a substitute for refined sugar. In food technology, date syrup as the main and general by-product of date is used for foodstuffs such as jams, marmalades, concentrated beverages, chocolates, ice cream, confectioneries, honey, etc [6][7][8]. As the Kabkab (Iranian Kabkab Dates) date has a high amount of wastes, it can be used for the date syrup production with economical advantageous [9].…”

Section: Introductionmentioning

confidence: 99%

Liquid Sugar Extraction from Date Palm (Phoenix dactylifera L.) Fruits

El-Sharnouby¹,

Aleid²,

Al-Otaibi³

2014

J Food Process Technol

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In date syrup manufacturing, date fruits (Phoenix dactylifera L.) are mixed with a suitable amount of water with heating at a temperature greater than 70°C for about 1 h. These conditions are not satisfactory for extraction greater amount of liquid sugar (date syrup). In addition, overheating for an extended period could damage nutritious materials and changes product's color. In this study, pectinase/cellulase enzymes and sonication processes were used to achieve maximum syrup extraction from a date variety (Reziz) compared with classical method. The following variables were examined: fruit/water ratio, mixture of enzymes percent and ultrasonic power. Enzymes and Ultrasound were applied for improving the quantity and quality of extracted syrup. Date extract was filtered with filter system (Novox 200, filtrox) which could result entirely a clear syrup and then concentrated by a rotary evaporator until about 75% total solids to produce higher quality syrup. Physicochemical properties of each collected sample during process were evaluated. Results showed that sonication power 25% at ratio 1/3 D/W could lead to a higher extraction of RSS (Recovery of Soluble Solids) (74.30%) in a shorter time with a better physicochemical quality of syrup in comparison to mixture of enzymes 1.0% (66.70%) and classical methods of extraction (58.45%). Data indicated the possibility of employing ultrasound (25%) or enzymes processes (pectinase/ cellulase 0.1%) for producing greater syrup amount highly desirable for use in food product development.

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Chemical composition and quality of date syrup as affected by pectinase/cellulase enzyme treatment

Cited by 96 publications

References 2 publications

Comparison Effects of Sucrose and Date Palm Syrup on Somatic Embryogenesis of Date Palm (Phoenix dactylifera L)

Comparison Effects of Sucrose and Date Palm Syrup on Somatic Embryogenesis of Date Palm (Phoenix dactylifera L)

Élaboration d’une boisson à partir d’écart de triage de dattes : clarification par traitement enzymatique et microfiltration

Liquid Sugar Extraction from Date Palm (Phoenix dactylifera L.) Fruits

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