Microbiological and Physicochemical attributes of two date Cultivars Hmira and Feggous’ in Abadela, Bechar Oasis , South-West of Algeria

2020 ◽  
Vol 9 (5) ◽  
pp. 207-213
Author(s):  
Laouar Asma ◽  
Makhloufi Ahmed ◽  
Makhloufi Khadidja
Keyword(s):  
Dry Weight ◽  
Phoenix Dactylifera ◽  
High Energy ◽  
Sweet Taste ◽  
Mean Value ◽  
South West ◽  
Phoenix Dactylifera L ◽  
International Regulations ◽  
Aerobic Flora ◽  
High Level

Phoenix dactylifera L. Date, a high energy fruit with a sweet taste, is one of the most important staple foods consumed in southern region of Algeria. The aim of this study was to determine the physico-chemical and microbial attributes of two common date varieties (Feggous and Hmira) in Abadla Oasis–Bechar (South-west of Algeria) for their valorization. The analysis showed that dates fruits contained a high level of total sugar which exceeded 80%, but a low content of fat (0.72%) and protein (0.91%). The mean value of humidity, pH and ash of the samples were obtained as 22.13%, 6.17, and 1.72% respectively all dates contained high amounts of K, Na, Fe, Cu, Zn, Mn, Ca, Mg and P. The maximum levels of the majority of minerals were found in Feggous variety. Moreover, Vitamin E and Vitamin C of under-valued dates ranged between 0.37 and 2.74 mg/100g on dry weight basis. The microbiological analyses of dates showed the existence of total aerobic flora, a fungal flora dominated by Penicillium and Aspergillus, yeasts as well as the absence of pathogen strains. The morphological, biochemical and microbial properties of studied date fruits were in accordance with national and international regulations. These results may be useful for valorization of local date varieties, and for evaluation of dietary information and concludes that dates are the good sources of minerals and vitamins in Saharan regions.

scholarly journals Effect of Four Pollinating Sources on Nutritional Properties of Medjool Date (Phoenix dactylifera L.) Seeds

Agriculture ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 45
Author(s):  
Ricardo Salomón-Torres ◽  
Jesús Arturo Sol-Uribe ◽  
Benjamín Valdez-Salas ◽  
Conrado García-González ◽  
Robert Krueger ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Dry Weight ◽  
Phoenix Dactylifera ◽  
Nutritional Composition ◽  
Nutritional Properties ◽  
Total Sugars ◽  
Northwest Mexico ◽  
Phoenix Dactylifera L ◽  
Low Concentrations ◽  
Pollen Sources

The objective of this study was to evaluate the effect of pollen source on the nutritional composition of seeds of the ‘Medjool’ date (Phoenix dactylifera L.) under conditions of northwest Mexico. The content of nutrients (protein, lipids, fiber, and ash), sugars (total, reducing, and non-reducing), and most abundant minerals, were evaluated, as well as antioxidant activities. The pollen of four cultivars (‘Deglet Noor’, ‘Khadrawy’, ‘Medjool’, and ‘Zahidi’) was selected. Four groups of three bunches were pollinated in each of the female palms. For the four treatments, the following ranges were obtained: Seeds had a weight of 1.32–1.41 g and low concentrations of protein (4.44–5.49 g/100 g) and lipids (9.62–10.19 g/100 g). The content of dietary fiber and ash was 59.65–72.59 g/100 g and 1.09–1.42 g/100 g, respectively. Total sugars content was 4.50–6.96 g/100 g, while the insoluble solids were 92.21–96.03 g/100 g. The predominant mineral was potassium with 399.97–459.79 mg/100 g dry weight, followed by sulfur with 135.51–162.67 mg/100 g dry weight. Finally, for antioxidant activities, DPPH (2,2′-diphenyl-1-picrylhydrazyl) and ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) assay results were 0.0014–0.0094 IC50 g/L and 0.176–0.299 IC50 g/L, respectively. The pollen sources had an effect on the physicochemical properties of the seeds of the ‘Medjool’ cultivar date. However, some of the parameters (diameter, total acidity, pH) did not show statistically significant differences. The pollen sources from the ‘Khadrawy’ and ‘Medjool’ cultivars were the ones that induced differences in physical, proximate, and nutritional parameters, while pollen from the ‘Zahidi’ source induced the largest differences for minerals. The results suggest that selection of the source of pollen has a significant effect on the nutritional properties of the date seed from the cultivar ‘Medjool’, and that its use could be feasible as a functional food or by-product of the date production.

Incidence de l'aération sur le traitement par compostage des sous-produits du palmier dattier contaminés parFusarium oxysporumf.sp.albedinis

2005 ◽  
Vol 51 (1) ◽  
pp. 69-77 ◽  
Author(s):  
K Chakroune ◽  
M Bouakka ◽  
A Hakkou
Keyword(s):  
Total Nitrogen ◽  
Date Palm ◽  
Dry Weight ◽  
Initial Mixture ◽  
Phoenix Dactylifera ◽  
The Other ◽  
Mineral Matter ◽  
Other Hand ◽  
Phoenix Dactylifera L ◽  
Cooling Phase

Composting of date palm (Phoenix dactylifera L.) residues contaminated with Fusarium f.sp oxysporum albedinis, causal agent of the vascular wilt (Bayoud) of the date palm, has been achieved. The effect of the aeration of the piles by manual turning has been studied. The maintenance of an adequate humidity of 60%–70%, necessary to the good progress of the composting process, required the contribution of 11.4 L of water/kg of the dried residues. The evolution of the temperatures in the three piles presents the same phases. A latency phase, followed after 2–3 d of composting by a thermophilic phase, which lasts about 24 d, where the temperature remains elevated between 50 and 70 °C. Then a cooling phase that takes about 15 d, during which the temperatures fall to values between 25 and 35 °C, near room temperature. Fusarium f.sp oxysporum albedinis is eliminated completely during the thermophilic phase of composting, and increasing frequencies of turning accelerate its disappearance to a certain extent. On the other hand, pH remained steady and relatively basic oscillating between 8.2 and 8.7. Ninety percent (90%) of the the date palm residues are composed exclusively of organic matters. The total nitrogen represents only 0.4%. The contribution of manure decreases the ratio of carbon to nitrogen (C/N) from 115 to 48 in the initial mixture. After 80 d of composting and according to the frequency of return up, there is a reduction of the granulometry of the substratum, the C/N ratio (from 29% to 44%), the organic matter (from 15% to 23%), the total volume (from 25% to 35%), and of the dry weight of the swaths (from 16% to 24%). On the other hand there is an increase in total nitrogen rate (from 20% to 40%) and in the mineral matter (from 23% to 35%).Key words: composting, palm date, Fusarium oxysporum f.sp. albedinis.

scholarly journals Cell suspension culture as a means to produce polyphenols from date palm (Phoenix dactylifera L.)

2018 ◽  
Vol 42 (5) ◽  
pp. 464-473 ◽  
Author(s):  
Poornananda Madhava Naik ◽  
Jameel Mohammed Al-Khayri
Keyword(s):  
Suspension Culture ◽  
Cell Suspension ◽  
Caffeic Acid ◽  
Cell Suspension Culture ◽  
Date Palm ◽  
Cell Suspension Cultures ◽  
Dry Weight ◽  
Phoenix Dactylifera ◽  
Fresh Weight ◽  
Phoenix Dactylifera L

ABSTRACT Date palm accumulates a wide range of secondary metabolites high in nutritional and therapeutic value. In the present study, date palm (Phoenix dactylifera L., cv. Shaishi) shoot-tip-induced callus was used to establish cell suspension cultures in Murashige and Skoog (MS) liquid medium containing 1.5 mg L-1 2-isopentenyladenine (2iP) and 10 mg L-1 naphthaleneacetic acid (NAA). To study the growth kinetics, cultures were maintained for 12 weeks during which weekly measurements were carried out to determine the biomass accumulation based on packed cell volume (%), fresh weight and dry weight (g). In addition, weekly determination of polyphenols (catechin, caffeic acid, kaempferol, and apigenin) was carried out using high performance liquid chromatography (HPLC). The 11-week-old culture was found highest in the production of biomass (62.9 g L-1 fresh weight and 7.6 g L-1 dry weight) and polyphenols (catechin-155.9 µg L-1, caffeic acid-162.7 µg L-1, kaempferol-89.7 µg L-1, and apigenin-242.7 µg L-1) from the cell suspension cultures. This is the first report on the production of polyphenols from the cell suspension culture of date palm. This study facilitates further development of large-scale production of polyphenols and the utilization of bioreactors.

scholarly journals Phenolic Composition and Antimicrobial Activity of Different Emirati Date (Phoenix dactylifera L.) Pits: A Comparative Study

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 497 ◽  
Author(s):  
M. Iftikhar Hussain ◽  
Mohammad H. Semreen ◽  
Abdallah Shanableh ◽  
Muhammad Nasir Khan Khattak ◽  
Ismail Saadoun ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Clinical Laboratory ◽  
Dry Weight ◽  
Inhibition Zone ◽  
Phoenix Dactylifera ◽  
Total Phenolic ◽  
E Coli ◽  
Phoenix Dactylifera L ◽  
Date Pits

The biochemical composition, secondary metabolites (phenolic compounds, flavonoids) and antimicrobial potential of different varieties of Emirati date (Phoenix dactylifera L.) pits were investigated. Total phenolic acids (TPC) and total flavonoid contents (TFC) of the different date pits were measured using a Folin–Ciocalteau reagent. Different organic solvents [(n-hexane; H2O: EtOH (1:1); ethyl acetate; acetone: Water (1:1); and methanol: Chloroform (1:1)] were compared to evaluate the phytotoxicity of Ajwa, Fard, Khalas, Khodari, Abu Maan, Lulu, and Mabroom date pits. The antimicrobial activity of the date pit extracts were evaluated by means of agar-well diffusion assay on Staphylococcus aureus (ATCC 29123), Escherichia coli (ATCC 25922) and Candida albicans (ATCC 66027). Minimum inhibitory concentrations (MICs) were measured following clinical laboratory standardization institute (CLSI) protocol. The biochemical analyses of date pits indicate that TPC were ranged from 7.80 mg of equivalent gallic acid⁄100 g dry weight in Ajwa to 4.65 mg in Mabroom. The TFC were ranged between 1.6–4.54 mg of equivalent catechin⁄100 g dry weight. Ajwa pit extract showed good quality traits (higher protein, lower ash content, and intermediate dietary fiber). The results indicate that the ethyl acetate extract of Khalas and Khodari inhibited S. aureus with an inhibition zone diameter of 20 mm and MIC of 10 mg/mL. Abu Mann pit extract inhibited the S. aureus and also decreased the population of E. coli. The diameter of inhibition zone was 15, 16, and 18 mm after treatment with Ajwa extracts, while the MICs were 7.5 and 5 mg/mL. The MeOH: CFM extract of Abu Mann and Ajwa was more potent against E. coli bacteria than any other extract. This work demonstrates that the Emirati date pits extract has antimicrobial (antibacterial, antifungal) potential and can be used as phytotoxic natural compounds.

scholarly journals Application of Date (Phoenix dactylifera L.) Fruit in the Composition of a Novel Snack Bar

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 918
Author(s):  
Salam A. Ibrahim ◽  
Hafize Fidan ◽  
Sulaiman O. Aljaloud ◽  
Stanko Stankov ◽  
Galin Ivanov
Keyword(s):  
Food System ◽  
Phoenix Dactylifera ◽  
Sweet Taste ◽  
Kingdom Of Saudi Arabia ◽  
Palm Fruit ◽  
Overall Acceptability ◽  
Date Fruit ◽  
Phoenix Dactylifera L ◽  
Functional Product ◽  
Sensory Qualities

The aim of the present study was to evaluate the possibilities for using date fruit from the Kingdom of Saudi Arabia in the formulation of a novel snack bar while replacing the used honey with date paste. The technological, textural, microbiological and sensory qualities of the obtained food products were evaluated during storage for 12 days after their production. Date palm fruit in the form of date paste was used as an ingredient in the composition of the new snack bars that also included nuts and dried fruits. Five formulations were prepared: a control bar, snack bar with 40% date paste, snack bar with 50% date paste, snack bar with 60% date paste, and snack bar with 70% dates paste. The resulting date paste’s textural characteristics supported the bonding potential of the food system and gave a sweet taste to the final product. The formulations containing 50% date paste presented the highest overall acceptability and were the formulation with the best sensory characteristics. Thus, the addition of date paste in snack bars would be a good option to develop a functional product that contributes to rational nutrition principles. The obtained values in the current study confirmed the technological and functional potential of date fruit as a product that can find adequate application in the composition of foods with functional properties.

scholarly journals Alternaria radicina Causing Leaf Spot Disease of Date Palm (Phoenix dactylifera L.) in Wasit (Middle of Iraq) and Its Susceptibility to Bioassay Test of Two Fungicides

2015 ◽  
Vol 4 (2) ◽  
pp. 81-86 ◽  
Author(s):  
Mohammed W. Khudhair ◽  
Ruaa A. Jabbar ◽  
Naeem S. Dheyab ◽  
Bassim S. Hamad ◽  
Hadi M. Aboud ◽  
...  
Keyword(s):  
Date Palm ◽  
Black Spot ◽  
Phoenix Dactylifera ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Phoenix Dactylifera L ◽  
Study Results ◽  
Bioassay Test ◽  
High Level

Three Alternaria radicina (Meier) Neerg isolates (A1, A2, and A3) were isolated and firstly recorded in date palm, Phoenix dactylifera L. leaves in Wasit province (middle of Iraq) and identified as the causative pathogen of black spot disease. Two fungicides (Bavistin and Tachigazole) were used in vitro to measure their ability to control this pathogen. Study results revealed that both chemical fungicides expressed high level of inhibition in fungal radial growth especially at a concentration of 100 ppm and the lowest growth was at the concentration 5 ppm among all three isolates in both two fungicides. Bavistin revealed higher inhibition rate than Tachigazole with lowest LC50 (12.21) at the isolate A3. Tachigazole treatment showed high level of variation at all concentrations.

Effect of Varieties on the Composition of Dates (Phoenix dactylifera L.) — Note

2007 ◽  
Vol 13 (4) ◽  
pp. 269-275 ◽  
Author(s):  
M.A. Sahari ◽  
M. Barzegar ◽  
R. Radfar
Keyword(s):  
Dry Weight ◽  
Phoenix Dactylifera ◽  
Mineral Elements ◽  
Weight Basis ◽  
Atomic Spectroscopy ◽  
The Other ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Phoenix Dactylifera L ◽  
The Mean

Thirty-four date (Phoenix dactylifera L.) varieties, from start of Tamr stage of maturity, were analyzed for moisture, protein, lipid and ash. The mean percent of moisture, protein, lipid and ash were 29.35, 3.3, 0.42 and 2.25 g/100 g (fresh weight basis), respectively. Predominant sugars were fructose (12.62—43.31 g/100 g) and glucose (16.41—54.23 g/100 g, fresh weight basis). Sucrose was not practically detected in most varieties (excepting in Zark variety). Mineral elements such as Na, Mg, K and Ca were determined by ICP atomic spectroscopy and their amounts were in the range of 4.46—47.74, 18.44—79.35, 203.61—982.97 and 23.24—73.85 mg/100 g (dry weight basis), respectively. These results were generally in agreement with those reported previously for some other varieties grown in the other dates producing countries. A few differences will be related to date variety, agro-climatic and environmental conditions.

scholarly journals Analysis of the Morphological Diversity of Inflorescence of Six Tunisian Date Palm (Phoenix dactylifera L.) Pollinators

2021 ◽  
Vol 3 (4) ◽  
pp. 56-62
Author(s):  
K. Kadri ◽  
M. Abdelhafidh ◽  
K. Aounallah
Keyword(s):  
Date Palm ◽  
Principal Component ◽  
Morphological Diversity ◽  
Phoenix Dactylifera ◽  
Flowering Stage ◽  
Relationship Analysis ◽  
Phoenix Dactylifera L ◽  
Quantitative Characteristics ◽  
Total Variability ◽  
High Level

Six Tunisian date palm pollinators were morphologically characterized at the inflorescence level. The aim was to assess the level of similarity between the spathe of the three flowering stages. Nineteen qualitative and quantitative characteristics were explored and subjected to multivariate analyzes. The results showed that inflorescences morphological similarity oscillated between 97.9 and 62.2% with an average of 80.1%, which testifies strong genetic relations among the six genotypes and among flowering stages/cycles within each genotype. Principal Component Analysis (PCA) analysis shows that weight of the spathe (SW), number of spathe (NS), shape of spathe (SS), total length of the spathe (TLS), shape of spikelets (SPS), number of spikelets per spathe (NS), These characteristics are defined by axis 1 and 2 which absorbing a total of 56.3% of total variability. Phylogenetic relationship analysis showed that two groups were distinguished by a high level of genetic similarity of inflorescences at each flowering stage. According to the analysis, the second flowering stage is the most distinguished morphologically with the highest sizes of the quantitative characteristics studied.

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