Kuwait, one of the gulf council member countries, situated in the Northeastern part of the Arabian Peninsula, experiences hyper-arid desert environmental condition due to the geographical location. Kuwait faces many c...Kuwait, one of the gulf council member countries, situated in the Northeastern part of the Arabian Peninsula, experiences hyper-arid desert environmental condition due to the geographical location. Kuwait faces many challenges in the sustainable development of the agricultural sector due to the scarcity of arable land, water resources and high rate of land degradation. So it is essential to emphasis the efficient use of the available water and soil resources in a sustainable manner and also to rehabilitate the degraded land using proper rehabilitation techniques. This study concentrates on the water harvesting and organic mulching （e.g., using date palms） methods. The study area is an artificial playa （2,500 m2）, formed through the dumping of the gravel quarries in December 2003. The application of the water harvesting and mulching technique in the study showed an improvement of soil physical properties. The average infiltration capacity has increased from 74 cm3/min to 112 cm3/min. The average difference in volume of infiltrated water was 33.5%. The bulk density and porosity of the control plot was 2 g/cm3 and 27%, respectively; while that of the treated soil was 1.5 g/cm3 and 44%, respectively. The moisture content of the treated soil was increased to 50%, more than control soil at depth 40-60 cm, and also there was a significant increase in organic matter. The temperature of the treated soil was 2 ℃ lower than the control soil at a depth of 60 cm. This study conserved the irrigation water through reducing the proportion of soil evaporation and thus creating an optimum condition for the plant growth.展开更多
A simple and rapid colorimetric method for the and Whatman filter paper chromatography is described. determination of some amino acids on thin layer chromatography （TLC） The studied compounds are cysteine, proline, ...A simple and rapid colorimetric method for the and Whatman filter paper chromatography is described. determination of some amino acids on thin layer chromatography （TLC） The studied compounds are cysteine, proline, methionine, tryptophan glutmine, glycine, thyrosine, threonine, leucine and lysine. The method is based on the formation of color from the reaction of stannous chloride （SnCI2） and ninhydrin reagents. The procedure has been successfully applied to the assay of the standard amino acid preparation after TLC separation, and the results of the studied compounds were clear and favorable, comparing to the official methods. However, the improved TLC is much more efficient for the detection of amino acid. The main advantage of this method is that the detection of amino acids can be preformed visually.展开更多
In this study, the adsorption of o-xylene was investigated using modified halloysite adsorbents. The modification of the halloysite adsorbents depended on thermal processing, treated sulphuric acid（Vl） and sodium hy...In this study, the adsorption of o-xylene was investigated using modified halloysite adsorbents. The modification of the halloysite adsorbents depended on thermal processing, treated sulphuric acid（Vl） and sodium hydroxide, water solution of ammonium chloride as well as hexadecylotrimethyloammonium bromide. Adsorption rate constants of the pseudo-second order models were compared for experiment carried in the batch system. Langmuir and Freundlich to fit the adsorption equilibrium experimental data. pseudo-first and models were able展开更多
文摘Kuwait, one of the gulf council member countries, situated in the Northeastern part of the Arabian Peninsula, experiences hyper-arid desert environmental condition due to the geographical location. Kuwait faces many challenges in the sustainable development of the agricultural sector due to the scarcity of arable land, water resources and high rate of land degradation. So it is essential to emphasis the efficient use of the available water and soil resources in a sustainable manner and also to rehabilitate the degraded land using proper rehabilitation techniques. This study concentrates on the water harvesting and organic mulching （e.g., using date palms） methods. The study area is an artificial playa （2,500 m2）, formed through the dumping of the gravel quarries in December 2003. The application of the water harvesting and mulching technique in the study showed an improvement of soil physical properties. The average infiltration capacity has increased from 74 cm3/min to 112 cm3/min. The average difference in volume of infiltrated water was 33.5%. The bulk density and porosity of the control plot was 2 g/cm3 and 27%, respectively; while that of the treated soil was 1.5 g/cm3 and 44%, respectively. The moisture content of the treated soil was increased to 50%, more than control soil at depth 40-60 cm, and also there was a significant increase in organic matter. The temperature of the treated soil was 2 ℃ lower than the control soil at a depth of 60 cm. This study conserved the irrigation water through reducing the proportion of soil evaporation and thus creating an optimum condition for the plant growth.
文摘A simple and rapid colorimetric method for the and Whatman filter paper chromatography is described. determination of some amino acids on thin layer chromatography （TLC） The studied compounds are cysteine, proline, methionine, tryptophan glutmine, glycine, thyrosine, threonine, leucine and lysine. The method is based on the formation of color from the reaction of stannous chloride （SnCI2） and ninhydrin reagents. The procedure has been successfully applied to the assay of the standard amino acid preparation after TLC separation, and the results of the studied compounds were clear and favorable, comparing to the official methods. However, the improved TLC is much more efficient for the detection of amino acid. The main advantage of this method is that the detection of amino acids can be preformed visually.
文摘In this study, the adsorption of o-xylene was investigated using modified halloysite adsorbents. The modification of the halloysite adsorbents depended on thermal processing, treated sulphuric acid（Vl） and sodium hydroxide, water solution of ammonium chloride as well as hexadecylotrimethyloammonium bromide. Adsorption rate constants of the pseudo-second order models were compared for experiment carried in the batch system. Langmuir and Freundlich to fit the adsorption equilibrium experimental data. pseudo-first and models were able
