Chemical composition of date varieties as influenced by the stage of ripening

Ahmed, Imad A; Ahmed, Abdul Wahab K; Robinson, R. K.

doi:10.1016/0308-8146(95)00051-j

Cited by 220 publications

(216 citation statements)

References 5 publications

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“…The data are in the same line with those reported by Morton and Miami (1987), El-Shamery and El-Dien (1988), Ramadan (1990 and1995), Al-Hooti et al (1997), Youssef et al (1998), Fadhl et al (1999), Sahari et al (2007) and El-Sohaimy and Hafez (2010). The same data revealed that Saidy date flesh contained 57.70 mg magnesium and 38.41 mg sodium /100 g dry matter which are in accordance with that reported by Ahmed et al (1995); Al-Hooti et al (1995), Fadhl et al (1999), Hassan (2000) and Sahari et al (2007). Among the micro-elements (Table 3) iron was the predominat element present of Saidy date fruits (6.27 mg/100g on dry weight basis).…”

Section: Minerals Contentsupporting

confidence: 90%

Effect of some Treatments on Chemical Composition and Quality Properties of Saidy Date Fruit (Phoenix dactylifera L.) During Storage

2016

AJAS

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This study was conducted out to improve the quality and the shelf-life of Saidy date variety during storage period for 12 months at room temperature using packing under vacuum, drying and irradiation (1KGy) treatments. Results showed that packing under vacuum is more effective for controlling the insect infestation (3.85%) followed by the irradiated (11.12%), dried (12.11%). While, the control sample recorded 17.24%, at the end of storage time (12 months). The moisture content of the control date sample decreased from 15.23 to 9.29% at the end of storage while it was decreased from 15.23 to 9.67%, from 15.15 to 8.92% and from 15.80 to 9.67% for the packed under vacuum, dried and irradiated samples, respectively. Data showed that, during the storage periods (12-months), the protein contents reduced from 2.52 to 1.97%, from 2.52 to 2.02%, from 2.57 to 2.15% and from 2.45 to 2.09% for the control, packed under vacuum, dried and irradiated samples, respectively. Data revealed that total bacterial counts immediately decreased after irradiation and drying to a greater extent, compared to the reduction in molds and yeasts. Beside, the microbial flora in all treatments remained at low count until the end of storage period. The irradiated sample had the lowest microbial counts, followed by the packed under vacuum and dried samples. The organoleptic evaluations show that the panelist could not discriminate between the non-irradiated and irradiated date fruits. Furthermore, all treatments have no detectable adverse effect on the preference rating of the fruits. The irradiated samples were occupied the first rank in overall acceptability of sensory evaluation followed by the dried and packed under vacuum samples. These results suggest that packing under vacuum, drying and irradiation treatments of Saidy date fruit could be used as alternative methods for improving the fruit quality, as well as prolonging its marketable period at room temperature for 12 months or more.

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Section: Minerals Contentsupporting

confidence: 90%

Effect of some Treatments on Chemical Composition and Quality Properties of Saidy Date Fruit (Phoenix dactylifera L.) During Storage

2016

AJAS

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“…The levels of Cu, Zn and Mn were 1.21, 0.81 and 0.57 mg/100 g dwb of Sakkoty flesh, respectively. Data of micro-elements levels agree with those reported by Morton and Miami (1987), Ahmed et al (1995), Al-Hooti et al (1995), Youssef et al (1998), Fadhl et al (1999 and Hasnaoui et al (2010). (Table, 4).…”

Section: Minerals Contentsupporting

confidence: 89%

“…The data are in the same line with those reported by Morton and Miami (1987), Al-Hooti et al (1997), Youssef et al (1998), Fadhl et al (1999), Hassan (2000), Sahari et al (2007) and El-Sohaimy and Hafez (2010). The same data revealed that Sakkoty flesh contained 56.19 mg Mg and 21.95 mg Na/100 g dry matter which are in accordance with that reported by Ahmed et al (1995), Al-Hooti et al (1995), Youssef et al (1999), Hassan (2000) and Sahari et al (2007).…”

Section: Minerals Contentsupporting

confidence: 87%

“…Moreover, it was clear that after 8 months of storage the fungus and yeasts were not detected in the samples with 2 and 4KGy doses. The low moisture content along with high sugar contents has made an increase the resistance of microbial deterioration where these conditions are unfavorable for the growth of microorganisms (Ahmed et al 1995 andAl-Kahtani et al, 1998). This result indicates that the microbiological quality of dates can be substantially improved by irradiation by doses of 1, 2 and 4KGy.…”

Section: Effect Of Gamma Irradiation On Chemical Composition Of Sakkomentioning

confidence: 98%

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Effect of Gamma Irradiation on Quality and Composition of Sakkoty Date Fruits (Phoenix dactylifera L.) During Storage

2017

AJAS

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This study was carried out to improve the quality and the shelf-life of Sakkoty date variety during storage period at room temperature using gamma irradiation doses of 0, 1, 2 and 4Kilo Gray (KGy). The effect of radiation treatments on the quality and composition of samples were evaluated at 0, 4, 8 and 12 months of storage. Results showed that the irradiated fruits with 4KGy are more effective for controlling the insect infestation (3.22%) followed by the irradiated date sample with 2KGy (6.00%) and 1KGy (6.45%). While, the control sample recorded 24.25% at the end of storage period. The moisture content of the control date sample decreased from 11.64 to 8.33% at the end of storage while it was decreased from 11.94 to 8.04%, from 11.89 to 8.35% and from 11.61 to 8.28% for the irradiated fruits by 1, 2 and 4KGy, respectively. However, the content of all sugars immediately decreased after irradiation, while it were increased gradually with increasing the storage time. Data revealed that the total bacterial counts immediately decreased after irradiation to a great extent, compared with the reduction in molds and yeasts. Beside, the microbial flora in all used doses were remained at a low count until the end of storage period. The irradiated sample with 4KGy had the lowest microbial counts, followed by the irradiated samples by 2 and 1KGy, respectively. The organoleptic evaluation showed that the panelists can not discriminate between the non-irradiated and irradiated date fruits. Furthermore, all the studied doses have no detectable adverse effect on the preference rating of the fruits. The irradiated sample with 1KGy was occupied the first rank in overall acceptability of sensory evaluation followed by the irradiated samples with 2KGy and with 4KGy. These results suggest that the packing irradiated fruits by 1, 2 and 4KGy of Sakkoty date fruit can be used as alternative method for improving the fruit quality, as well as prolonging its marketable period at room temperature for 12 months.

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“…The total world production of dates was 7.6 million metric tons (MMT) in 2014, which represents more than 2.2 times increase compared to 1990 production of 3.4 MMT [7]. Dates are considered nutritious and high-energy food (1180 kJ per 100 g) because they are rich in sugars providing quick energy intake [8], minerals [9], vitamins [10], phenols, flavonoids, anthocyanins and carotenoids with ____________________________________________________________________________ 2017 / 20 25 functional properties [11]. Dates are known to be heart-healthy [12], and their soluble fiber helps against constipation [13].…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Refrigeration as an Alternative Anti-Pest Treatment of Dates

Lallouche

Kolodyaznaya

Boulkrane

et al. 2017

Environmental and Climate Technologies

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-Large amounts of dates are produced and consumed around the world each year. Apomyelois ceratoniae causes main losses during storage and export of date fruit. Fumigation is the most widely used treatment to prevent postharvest losses. However, this treatment negatively affects the biological value of dates, environmental and economic parameters of production. Widespread fumigation agent methyl bromide is toxic to a human body and contributes to the destruction of the ozone layer. The aim of the current work was to find a new method based on the use of low temperature refrigeration to reduce the pest and insect infestation preserving the nutritive value of dates during cold storage at the same time. A. ceratoniae mortality under different temperatures and dates respiration rate, sugar, organic acids, pectic substances content and sensorial characteristics were studied. The results indicate that at −18 °С the A. ceratonie larva dies within 2 h, the eggs and larvaewithin 24 h respectively. Thus, it is clearly shown that there is no need in using chemicals or irradiation to prevent dates pests. Physicochemical and organoleptic proprieties of dates were satisfactory during 360 d at −18 °С and during 180 d at +4 °С. The low temperature refrigeration and storage at −18 °С is recommended for dates to prevent pests and quality losses. It is apparently advantageous for environment and climate if compared with other anti-pest treatment variants.

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Chemical composition of date varieties as influenced by the stage of ripening

Cited by 220 publications

References 5 publications

Effect of some Treatments on Chemical Composition and Quality Properties of Saidy Date Fruit (Phoenix dactylifera L.) During Storage

Effect of some Treatments on Chemical Composition and Quality Properties of Saidy Date Fruit (Phoenix dactylifera L.) During Storage

Effect of Gamma Irradiation on Quality and Composition of Sakkoty Date Fruits (Phoenix dactylifera L.) During Storage

Low Temperature Refrigeration as an Alternative Anti-Pest Treatment of Dates

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