scholarly journals Some physiochemical properties of Acacia honey from different altitudes of the Asir Region in Southern Saudi Arabia

2017 ◽  
Vol 35 (No. 4) ◽  
pp. 321-327 ◽  
Author(s):  
Mohammed Mohammed Elimam Ahamed ◽  
Alfifi Abdallah ◽  
Aamadawi Abdalaziz ◽  
Alfaifi Mohammad Y ◽  
Elbehairi Serag Eldin I ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Specific Gravity ◽  
International Standards ◽  
High Altitudes ◽  
Physiochemical Properties ◽  
Mean Values ◽  
Acacia Honey ◽  
The Mean ◽  
Asir Region ◽  
Different Altitudes

The physiochemical properties of six Acacia honey samples taken from three different altitudes in the Asir region were determined. The means of all the studied parameters were within the international standards and were comparable to previous studies (0.11 ± 0.08% for ash, 10.93 ± 1.97% for water, 3.56 ± 0.19 for pH, 38.63 ± 17.17 meq/kg <br /> for acidity, 659.51 ± 324.98 μS/cm for conductivity, and 1.45 ± 0.02 for specific gravity). Comparison of the mean values of the parameters at the different altitudes revealed gradual increases with increasing altitude, except for ash and specific gravity. Significant differences were seen in ash and water percentages, acidity, and conductivity. While the mean values of the studied physiochemical properties of the Acacia honey samples were within the ranges of international standards, the honey produced at high altitudes exhibited variable physiochemical properties.

Antioxidant Vitamins in Honey Samples from Different Floral Origins and Altitudes in Asir Region at the South-Western Part of Saudi Arabia

2019 ◽  
Vol 15 (3) ◽  
pp. 296-304 ◽  
Author(s):  
Amal Al-Mosa ◽  
Eid I. Brima ◽  
Khaled F. Fawy ◽  
Hamed A. AL Ghrama ◽  
Mohammed E.A. Mohammed
Keyword(s):  
Vitamin A ◽  
Vitamin C ◽  
Mean Value ◽  
The Other ◽  
P Value ◽  
Redox Titration ◽  
Physiochemical Properties ◽  
Acacia Honey ◽  
The Mean ◽  
Asir Region

Background: Different factors are known to affect the different physiochemical properties of bee's honey including the floral origin and climate. Objective: The aim of this article was to investigate the effect of floral origin and altitude on the concentration of vitamin C and A. Methods: Ten Ziziphus honey samples were collected from two altitudes; 113 and 511 meters. Twenty-five Acacia honey samples were included in this study from five altitudes; 14, 113, 317, 576 and 2247 meters above sea level. Vitamin C was measured by redox titration and vitamin A was estimated using the Carr-price reaction and spectrophotometer. Results: The mean± SD of vitamin C in the Ziziphus and Acacia honey samples were 239.2± 91.5 and 260.4± 81.1 mg\100g, respectively. Vitamin A mean value± SD in the Ziziphus and Acacia honey were 0.088± 0.126 and 0.062± 0.126 mg\ 100g, respectively. Concerning the effect of altitude, there was significant increase in vitamin C concentration in ziziphus honey with the increase of the altitude (p- value= 0.027), while an insignificant decrease was obtained in the case of vitamin A. Regarding the effect of altitude on the concentration of vitamin C in the Acacia honey, there was significant increase in the honey from the altitude of 2247 compared to the honey from all the other altitudes. Vitamin A concentration in the Acacia honey from the altitude 2247 was insignificantly decreased compared to the honey from all the other altitudes (p- value > 0.05). Conclusion: The floral origin insignificantly affected the concentration of vitamin C and A. The altitude significantly affected the concentration of vitamin C irrespective of the floral origin.

scholarly journals Calibration of the depth invariant algorithm to monitor the tidal action of Rabigh City at the Red Sea Coast, Saudi Arabia

2020 ◽  
Vol 12 (1) ◽  
pp. 1666-1678
Author(s):  
Mohammed H. Aljahdali ◽  
Mohamed Elhag
Keyword(s):  
Remote Sensing ◽  
Saudi Arabia ◽  
Wind Speed ◽  
Red Sea ◽  
Remote Sensing Data ◽  
Microwave Remote Sensing ◽  
Optical Data ◽  
Mean Values ◽  
Sensing Data ◽  
The Mean

AbstractRabigh is a thriving coastal city located at the eastern bank of the Red Sea, Saudi Arabia. The city has suffered from shoreline destruction because of the invasive tidal action powered principally by the wind speed and direction over shallow waters. This study was carried out to calibrate the water column depth in the vicinity of Rabigh. Optical and microwave remote sensing data from the European Space Agency were collected over 2 years (2017–2018) along with the analog daily monitoring of tidal data collected from the marine station of Rabigh. Depth invariant index (DII) was implemented utilizing the optical data, while the Wind Field Estimation algorithm was implemented utilizing the microwave data. The findings of the current research emphasis on the oscillation behavior of the depth invariant mean values and the mean astronomical tides resulted in R2 of 0.75 and 0.79, respectively. Robust linear regression was established between the astronomical tide and the mean values of the normalized DII (R2 = 0.81). The findings also indicated that January had the strongest wind speed solidly correlated with the depth invariant values (R2 = 0.92). Therefore, decision-makers can depend on remote sensing data as an efficient tool to monitor natural phenomena and also to regulate human activities in fragile ecosystems.

Evaluation of chemical contamination of surface water and groundwater in the landfill city of Ardabil

2015 ◽  
Vol 16 (SE) ◽  
pp. 631-637
Author(s):  
Maliheh Shahmorad Moghanlou ◽  
Ebrahim Fataei
Keyword(s):  
Heavy Metals ◽  
Surface Water ◽  
International Standards ◽  
Chemical Contamination ◽  
Mean Values ◽  
Surface Water And Groundwater ◽  
Turbidity Level ◽  
The Mean ◽  
Spss Software ◽  
Hydrodynamic Thickness

Todays in our country the problem of waste disposal and the effects of entry alluvial aquifer their leachate and pollution of aquifers by hydrodynamic thickness in the direction of groundwater flow is highly regarded analytical descriptive study was conducted. To this purpose, the concentration of heavy metals plumb and cadmium and some physicochemical and biological parameters of surface water and groundwater around the landfill city of Ardabil in two time periods in spring 2015 and summer seasons were measured. Sampling, preparation and analysis of samples in accordance with the standard method of station 10 to within 5.5 km of landfill were Ardabil. Measurement of heavy metals, plumb and cadmium by atomic absorption were performed. The Results were analyzed by SPSS software, for the comparison of each parameter with drinking water standards and Agriculture tests comparing the average (T-TEST) was used. The results showed that groundwater and surface water of heavy metals, non-contaminated area and their results are below international standards. The mean values ??of microbiological and physicochemical parameters other than normal turbidity level and at the level of 1% were significantly lower than international standards.

Diurnal and daily changes in the excretion of urinary silica by Merino sheep

1966 ◽  
Vol 17 (2) ◽  
pp. 183 ◽  
Author(s):  
MC Nottle
Keyword(s):  
Specific Gravity ◽  
Urine Volume ◽  
Urinary Calculus ◽  
Mean Values ◽  
Merino Sheep ◽  
Ph Values ◽  
Silica Concentration ◽  
Calculus Formation ◽  
The Mean ◽  
Daily Changes

Urine collected at 2-hr intervals over a 24-hr period from a group of five sheep fed on the same diet in five different ways showed considerable fluctuations in volume, pH, and silica concentration. pH values ranged from 7.8 to 4.8, and silica concentration from 830 to 110 µg/ml. The latter appeared to be inversely related to urine volume, which reached a maximum c. 12 hr after feeding. Urine collected at 24-hr intervals for 10 consecutive days from eight sheep showed marked variations in silica concentration and specific gravity. These variations appeared to be inversely related to urine volume, and silica concentration seemed to be influenced also by daily variations in total silica excretion. Considerable differences were found in the mean values for different sheep. The significance of these results are discussed in relation to siliceous urinary calculus formation.

scholarly journals Implementation of TQM and the Integration of BIM in the Construction Management Sector in Saudi Arabia Validated with Hybridized Emerging Harris Hawks Optimization (HHO)

2021 ◽  
Author(s):  
Mohammad Abazid ◽  
Hüseyin Gökçekuş ◽  
Tahir Celik
Keyword(s):  
Saudi Arabia ◽  
Construction Projects ◽  
Evaluation Metrics ◽  
Support Vector ◽  
Relative Importance ◽  
Total Quality ◽  
Mean Values ◽  
Performance Accuracy ◽  
Importance Index ◽  
The Mean

This research is aimed at evaluating two different scenarios, firstly, appraising the impacts of employing the concepts of Total Quality Management (TQM) to the construction projects in Saudi Arabia. The results of the study were obtained through utilization of a descriptive analytical approach, where 300 questionnaires were distributed to engineering firms and companies with a response rate of 200 questionnaires, hence achieving the study sample for this research. The data gathered was analyzed by applying the Statistical Package for Social Science (SPSS) program and calculating the Relative importance index (RII) and the mean values. From the research conducted, the outcomes showed that the management&rsquo;s ability to commit using TQM while applying BIM obtained a relative importance of (0.717), while the relative importance for the management&rsquo;s ability to commit using TQM without the application of BIM is (0.552). The results showed that construction projects in Saudi Arabia still sustain setbacks from applying TQM concepts and suffer from the lack of administrative, scientific and technical applications. In a second scenario, a hybridized support vector regression (SVR) Harris-hawks optimization (HHO) (i.e., SVR-HHO) were used to predict the TQM. The performance accuracy of the models was checked through three different evaluation metrics namely; mean square error (MSE), correlation co-efficient (CC) and Nash-Sutcliffe efficiency (NSE). the hybridized emerging SVR-HHO outperformed the other two data driven approaches in both the training and testing stages based on the employed evaluation metrics. Overall, the obtained results showed that both the machine learning and metaheuristic approaches were capable of predicting TQM.

scholarly journals Physico-chemical properties, antioxidant, and antimicrobial activity of five varieties of honey from Saudi Arabia

2021 ◽  
pp. 27-34
Author(s):  
Mukhtar Ismail ◽  
Emad M. Abdallah ◽  
Eman R. Elsharkawy
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Saudi Arabia ◽  
Biological Activities ◽  
Chemical Properties ◽  
International Standards ◽  
Significant Activity ◽  
Physico Chemical ◽  
Acacia Honey ◽  
Antioxidant And Antimicrobial Activity

Wild honey is believed to have plentiful nutritional and health benefits. Numerous studies dealing with the characteristics and biological activities of honey have proved its biological activities. However, little is known about Saudi wild honey. In the current study, the physico-chemical properties, antioxidant and antimicrobial activity of five varieties of wild honey collected from different locations in Saudi Arabia were examined. Results showed that, the physico-chemical characteristics of all samples were in compliance with international standards. Qualitative and quantitative analysis of sugar (glucose, fructose and sucrose) was determined by high-performance liquid chromatography (HPLC). The analysis exhibited that fructose is the major sugar type in all examined wild honeys, which was found in highest concentration in flowers honey (46 g/100 g), whereas, the lowest fructose concentration was found in Ziziphus honey (36 g/100 g). All monofloral honey showed significant antioxidant activity. Alfalfa honey recorded the highest antioxidant activity, followed by Ziziphus honey, respectively. However, Tamarisk honey recorded the lowest antioxidant activity among honey samples. Honey's antibacterial activity against five microorganisms displayed differing degrees of inhibition. The overall findings indicated that no antifungal activity was seen against Candida albicans. The antibacterial examination of honey samples revealed non-significant activity against all tested bacteria, except with Staphylococcus aureus ATCC BAA 1026, where the Acacia honey exhibited significant activity against this bacterium (p < 0.05), with a mean of inhibition zone of 12.0+0.0 mm and a minimum inhibitory concentration of 12.5%. The results of the other types of honey were statistically non-significant.

scholarly journals Distribution and periodicity of sandflies (Diptera: Phlebotominae) along different altitudes in Asir Region, Southwest of Saudi Arabia

2015 ◽  
Vol 47 (2) ◽  
pp. 56 ◽  
Author(s):  
M.A. Kenawy ◽  
H.A. Al Ashry ◽  
M. Shobrak
Keyword(s):  
Saudi Arabia ◽  
Wind Velocity ◽  
New Record ◽  
Light Traps ◽  
Composition Distribution ◽  
Phlebotomine Sandflies ◽  
Control Light ◽  
One Year ◽  
Asir Region ◽  
Different Altitudes

Asir Region in the southwest of Saudi Arabia has been a subject for expansion of agricultural projects, urbanization, which presumably have impact on distribution of phlebotomine sandflies. Few reports are available on sandflies in this region which is an important focus of cutaneous leishmaniasis. Therefore, this study aimed at updating the species composition, distribution and periodical fluctuation of sandflies in this region. Specimens were monthly collected by the Center for Disease Control light traps for one year in four localities representing different altitudes. In five other, collections were twice during the year period. Ten species (six <em>Phlebotomus</em> and four <em>Sergentomyia</em>) were identified, of which <em>P. arabicus</em> (32%) was the most common followed by <em>P. bergeroti</em> (29%) and <em>P. sergenti</em> (15%). Of the reported species, <em>S. palestinensis</em> is considered a new record from Asir. Sandflies were more common and maximum biodiversity was observed in lowlands and not in high altitudes. At different altitudes, the two commonest species were more active during spring. Sandfly density (sandfly/trap) was directly related to temperature and inversely related to altitude, relative humidity (RH) and wind velocity (P&lt;0.05). To sum up, the distribution and abundance of sandflies in Asir are influenced by a combination of different factors: temperature, RH, wind velocity and altitude.

scholarly journals Hydrogen Peroxide and Dicarbonyl Compounds Concentration in Honey Samples from Different Botanical Origins and Altitudes in the South of Saudi Arabia

2019 ◽  
Vol 7 (1) ◽  
pp. 150-160 ◽  
Author(s):  
MOHAMMED ELIMAM AHAMED MOHAMMED ◽  
WED ALARGANI ◽  
MOHAMED A.A. SULEIMAN ◽  
HAMED ALI AL-GRAMAH
Keyword(s):  
Hydrogen Peroxide ◽  
Saudi Arabia ◽  
Sea Level ◽  
Chemical Constituents ◽  
The South ◽  
High Concentration ◽  
Physiochemical Properties ◽  
Gulf Countries ◽  
Low Concentrations ◽  
Acacia Honey

Different factors are known to affect the chemical constituents of the bees honey including the climate and the floral origin. The objective of this study was to investigate the effect of floral origin and altitude on some physiochemical properties of honey samples from the south western part of Saudi Arabia. The investigated physiochemical properties were the pH, conductivity and the concentration of hydrogen peroxide and dicarbonyl molecules. Fifteen Ziziphus spina christi honey samples were collected from three different altitudes in Asir Region (113, 317 and 511 meters above sea level) and twenty fiveAcacia spp honey samples (14, 113, 567, 576 and 2247 meters above sea level). Honey pollens were analyzed to confirm the botanical origin of the honey samples. The pH and conductivity of the honey were determined and compared to three honey standards (Gulf countries standards, CODEX and USA national honey board). The hydrogen peroxide percentage (ww) was determined by titration with ceric sulfate and ferroin as indicator while the dicarbonyls were determined as glyoxal equivalent using spectrophotometer. The pH and conductivity were measured using pH meter and conductometer. The SPSS version 20 program was used for the analysis of the obtained results. The honey samples contained high amounts of the plants pollens and the pH and conductivity were within the standards ranges. The Ziziphus honey was characterized by significantly high mean percentage of hydrogen peroxide (3.9% ± 2.2) compared to the Acacia honey (2.5% ± 0.83) and the Acacia honey contained the highest mean concentration of the dicarbonyl molecules (278.7mg/100g ± 278.4) compared to (147.6mg/ 100g ± 93.2) in the Ziziphus honey. Regarding the effect of altitude, the high altitudes were characterized by low concentrations of hydrogen peroxides and high concentration of dicarbonyl molecules. The altitude significantly increased the dicarbonyl molecules concentration and significantly decreased the hydrogen peroxide percentage.The Ziziphus honey was characterized by significant high percentage of hydrogen peroxide while the Acacia honey was characterized by significant high concentration of dicarbonyl molecules.

scholarly journals Environmental comfort in constructions for Sindi and Guzera calves in the agreste region of the State of Paraiba, Brazil

2012 ◽  
Vol 32 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Dermeval A. Furtado ◽  
Adriana P. Peixoto ◽  
José W. B. do Nascimento ◽  
Jonh E. F. Regis
Keyword(s):  
Experimental Period ◽  
Average Concentration ◽  
Climatic Conditions ◽  
International Standards ◽  
Mean Values ◽  
Normal Ranges ◽  
Bioclimatic Index ◽  
Humidity Index ◽  
The Mean

The objective of this study was to evaluate the quality of air, bioclimatic indexes of facilities and physiological indices of Guzera and Sindhi calves, reared in climatic conditions of Agreste. The study was conducted at the experimental station of Alagoinha, PB, Brazil, using 16 calves of Sindi and Guzerá races. The average concentration of oxygen (20.85%), ammonia (1.99 ppm), carbon monoxide (<0.01 ppm), methane (0.13 ppm) and hydrogen sulfide (<0.01) within facilities, were within the limits established by the Brazilian and international standards, for both animals and workers. The bioclimatic index of temperature and humidity and the temperature of the black globe and humidity index were within the thermal comfort zone for cattle in most of the experimental period, the mean values of respiratory frequency (26.0 min mov-1) and skin temperature (32.3 °C) were higher in the hottest time of the day (1 pm) and rectal temperature (39.3 ºC) in the late afternoon (5 pm), but remained within normal ranges for the studied races. The races have good adaptability to climatic conditions in the region of the Paraibano Agreste, Brazil.

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