scholarly journals Variation in Seedling Characteristics of Five Populations of Acacia tortilis From the United Arab Emirates in Response to Increasing Sodium Chloride Concentrations

2001 ◽  
Vol 6 (1) ◽  
pp. 15
Author(s):  
Fatma. M. Al-Ansari ◽  
Rashied. S. Modawi
Keyword(s):  
Salt Stress ◽  
Sodium Chloride ◽  
United Arab Emirates ◽  
Germination Rate ◽  
Acacia Tortilis ◽  
Local Conditions ◽  
Al Ain ◽  
The City ◽  
Seedling Characteristics ◽  
Chloride Concentrations

Seeds of Acacia tortilis collected from 5 sites around the city of Al Ain in the United Arab Emirates were germinated in 4 concentrations of sodium chloride (0, 20, 90 and 150 mM of NaCl). Percent of germination, rate of germination, seedling moisture content, root and shoot lengths and seedling lengths were all significantly affected by salt stress. Seeds collected from the different sites were significantly different in their response to salinity conditions. Variations in the response of seedlings from different sites to the different salt treatments suggest an underlying genetic variability within the A. tortilis   populations, possibly resulting from variations in the prevailing local conditions. Urbanization in the area and the changing water table may have divided A. tortilis into distinct subpopulations that are significantly different in seedling characteristics and their response to saline conditions. 

Quantitative assessment of residential water end uses and greywater generation in the City of Al Ain

2014 ◽  
Vol 15 (1) ◽  
pp. 114-123 ◽  
Author(s):  
Rezaul K. Chowdhury ◽  
Walid El-Shorbagy ◽  
Mwafag Ghanma ◽  
Assem El-Ashkar
Keyword(s):  
United Arab Emirates ◽  
Water Consumption ◽  
Water Demand ◽  
Logistic Distribution ◽  
Water Abundance ◽  
Internal Water ◽  
Al Ain ◽  
The City ◽  
Water Uses ◽  
End Uses

Diversification of water sources and water demand reduction are two vital tools in maintaining the security of urban water supplies in the United Arab Emirates (UAE). Reuse of greywater for non-potable end uses can be an effective alternative, but this resource has not yet received much attention in the UAE. Since the generation of greywater significantly differs from country to country – depending on age, gender, habits, lifestyle, living standards and the degree of water abundance – an attempt was made to estimate internal water consumption and greywater generation in the city of Al Ain, UAE. The frequency and water requirement for personal water uses (e.g. showers, ablutions, teeth brushing, hand washing, face washing and toilet flushing) and family water uses (e.g. laundry, dish washing and house cleaning) were estimated from about 100 villa-type detached homes randomly distributed across the city. A frequency analysis was carried out using normal, lognormal, gamma and logistic distribution. The estimated average generation rate of greywater was found to be 192 litres per capita per day, which is about 69% of the average internal water consumption. The generated greywater originates from showers (49%), ablutions (18%), laundry (10%) and washbasins (23%). Based on average quantities, it was shown that the generated greywater is sufficient to fulfil the non-potable water demand in houses, but further, more rigorous, investigation is required.

Responses of the Azolla filiculoides Stras.–Anabaena azollae Lam. association to elevated sodium chloride concentrations: Amino acids as indicators for salt stress and tipping point

2013 ◽  
Vol 106 ◽  
pp. 20-28 ◽  
Author(s):  
Monique M.L. van Kempen ◽  
Alfons J.P. Smolders ◽  
Gerard M. Bögemann ◽  
Leon L.M. Lamers ◽  
Eric J.W. Visser ◽  
...  
Keyword(s):  
Amino Acids ◽  
Salt Stress ◽  
Sodium Chloride ◽  
Tipping Point ◽  
Azolla Filiculoides ◽  
Anabaena Azollae ◽  
Chloride Concentrations

scholarly journals Comparative study on Biochar salt absorption capacity in different saline concentrated solutions

Bionatura ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 2150-2155
Author(s):  
Vanessa Rocha
Keyword(s):  
Particle Size ◽  
Salt Stress ◽  
Sodium Chloride ◽  
Soil Salinity ◽  
Absorption Capacity ◽  
Deionized Water ◽  
Concentrated Solutions ◽  
Temperature Changes ◽  
Salt Affected Soils ◽  
Chloride Concentrations

Salt-affected soils are caused by excess accumulation of salts. As soil salinity increases, salt effects can result in the degradation of soils. Previous studies have determined that biochar has the potential to reduce salt stress in soils. In this study, the electroconductive properties of biochar to adsorb salts were investigated in different saline-concentrated solutions. Pelletized, fragmented and powdered biochar were placed in solutions with concentrations of 0, 50, 500, 1000, and 2000 parts per million sodium chloride, respectively. Control treatments consisted of deionized water mixed with salt and no biochar addition. A week after setting the experiment, the electroconductivity measurements were significantly higher relative to the first day. Significant differences were observed among treatments for pelletized, fragmented, and powdered biochar treatments. Increases in electroconductivity values are attributed to ambient temperature changes and differences in particle size. However, pelletized biochar declined in electroconductive values, which is attributed to ions being retained inside the pores of bigger particles. Our study concludes that biochar can adsorb salts at lower sodium chloride concentrations; therefore, it may help mitigate soil salt stress.

scholarly journals Prevalence and characteristics of sellar masses in the city of Al Ain, United Arab Emirates: 2011 to 2016

2020 ◽  
Vol 40 (2) ◽  
pp. 105-112
Author(s):  
Khaled M. Aldahmani ◽  
Jayadevan Sreedharan ◽  
Mohamad Milad Ismail ◽  
Jim Philip ◽  
Satish Chandrasekhar Nair ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Al Ain ◽  
The City

scholarly journals Pertussis seronegativity in pregnant women in the city of Al Ain, United Arab Emirates

2019 ◽  
Vol 89 ◽  
pp. 96-101
Author(s):  
Hassib Narchi ◽  
Wafa Osman ◽  
Junu A. George ◽  
Lolowa A. Almekhaini ◽  
Abdul-Kader Souid ◽  
...  
Keyword(s):  
Pregnant Women ◽  
United Arab Emirates ◽  
Al Ain ◽  
The City

Effects of site of origin, time of seed maturation, and seed age on germination behavior of Portulaca oleracea from the Old and New Worlds

2000 ◽  
Vol 78 (3) ◽  
pp. 279-287 ◽  
Author(s):  
Ali El-Keblawy ◽  
Fatima Al-Ansari
Keyword(s):  
United Arab Emirates ◽  
Room Temperature ◽  
Germination Rate ◽  
Portulaca Oleracea ◽  
Seed Maturation ◽  
Origin Time ◽  
Al Ain ◽  
Geographical Regions ◽  
Seed Age ◽  
Different Seasons

The effects of site of origin, time of seed maturation, and seed age on germination behavior, in terms of final percentage of germination and time for 50% of final germination were investigated in the widespread weed Portulaca oleracea L. Seeds were collected in August from one population at each of three geographical regions of the Old and New Worlds representing temperate (Southern Ontario, Canada), Mediterranean (Tanta, Egypt), and subtropical (Al-Ain, United Arab Emirates (U.A.E.)) climates. The freshly harvested seeds were incubated in both light and dark at 15, 25, and 40°C. Seeds of the U.A.E. site showed little dormancy and germinated faster under a wider range of incubation conditions than did seeds from the Canadian site. To assess the effect of time of seed maturation on germination behavior, seeds were collected during the different seasons (November, February, May, and August) of the U.A.E. population. The percentage of germination was significantly higher for seeds collected in May and November and germination was significantly faster for those collected in May and August. Response of germination to light and temperature varied according to site of origin and time of seed maturation. Seeds from the Canadian site and those that matured during winter from the U.A.E. site required light and high temperature for optimal germination. The effect of seed age on percentage of germination and rate was significant at the Canadian site but not at the Egyptian and U.A.E. sites. Seed stored for 5 months at room temperature germinated significantly faster and to a higher percentage than freshly harvested seeds. Results are discussed in light of the adaptation of seed dormancy and time of germination to the prevailing environmental conditions.Key words: dormancy, geographical regions, germination, germination rate, Portulaca oleracea, seed age, site of origin, time of seed maturation.

Germination and Seedling Development of Hogpotato (Hoffmanseggia densiflora)

Weed Science ◽  
1987 ◽  
Vol 35 (3) ◽  
pp. 360-363 ◽  
Author(s):  
Neil M. Hackett ◽  
Don S. Murray
Keyword(s):  
Sodium Chloride ◽  
Germination Rate ◽  
Seedling Development ◽  
Distilled Water ◽  
Nacl Concentration ◽  
Percent Germination ◽  
Chloride Concentrations

Acid-scarified hogpotato (Hoffmanseggia densifloraBenth. ex. Gray # HOFDE) seed incubated in distilled water germinated at least 94% when incubated at constant 15, 20, 30 C, and at alternate 20/30 C (20 C for 16 h and 30 C for 8 h) temperatures. Highest germination in buffered solutions occurred at pH 5.0 and 6.0 with reduced germination at lower and higher pH levels. Sodium chloride concentrations of 50 mM and greater reduced the germination rate. Percent germination after 9 days was reduced at NaCl concentrations of 100 mM and greater. Radicle lengths measured after 3 days were significantly reduced with increasing NaCl concentration. Twenty-day-old hogpotato seedlings having three true leaves were able to resprout after topgrowth removal. Regrowth occurred on 15% of the seedlings approximately 15 days after top removal.

scholarly journals An overview of food safety knowledge and practices in selected schools in the city of Al Ain, United Arab Emirates

2016 ◽  
Vol 10 (15) ◽  
pp. 511-520 ◽  
Author(s):  
Abushelaibi Aisha ◽  
Jobe Baboucarr ◽  
Al Dhanhani Fatima ◽  
Al Mansoori Sharifa ◽  
Al Shamsi Feryal
Keyword(s):  
Food Safety ◽  
United Arab Emirates ◽  
Al Ain ◽  
Safety Knowledge ◽  
The City

Ras al Khaimah: further archaeological discoveries

Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi
Keyword(s):  
United Arab Emirates ◽  
The State ◽  
Focused Attention ◽  
North East ◽  
The North ◽  
History Of ◽  
The City

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.

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