Vol. 10 Issue 1
A. Beddaa and M. Oudadess
A definition of saturated uniformly locally A-convex algebras has been given by Cochran (1973). Rece ntly Oudadess (1986) showed that these algebras don't exist and gave another definition . In this paper we extend the notion of saturatedness to the class of p-Normed Algebras and give characterisations of some subclasses. Also some theorems of Gelfand-Naimark type are obtained
Hatif A. Alshirayda , Ibrahim S. Alnaimi, Ala'a Auoobl and Khalid G. Aladely
A new series of cyclic diphenyl tellurium salts based on tellura cyclopentane of the type C4HsTe2; where: L =C6H5O-; p-CH3OC6H40-; p-CH3OC6H4O-; o-ClC6H4O-; o-NO2C6H4O-; o, p-(NO2)2C6H3O- ; have been prepared , The 1H NMR data and molar conductivities in dimethylsulfoxide (DMSO) revealed considerable ionic character, particularly in compounds with nitro-substituents. I. R. spectroscopic data are reponed and briefly discussed.
M. Tahir Hussein and A.S. Bazuhair
Haddat Al Sham - Al Bayada area is situated about 100 km to the east-northeast of Jeddah . The average annual rainfall within the study area is about 100 mm. Groundwater occurs within the alluvial deposits of the wadi system and also within the clastic members of Cretaceous - Tertiary sedimentary succession. The alluvial aquifer is characterized by a hydraulic gradient of 1.6 x 10-2 - 8.8 x 10-2 , an average transmissivity of 390 m2 /day, average permeability of 34 midday and a storage coefficient of 1.12 x 10-3- 1.28 x 10-1. The groundwater within the clastic members moves under a hydraulic gradient of 6.0 x 10-4 -1.4 x 10-2 , an average transmissivity of 180 m2/day, and an average permeability of 10 midday. Its storage coefficient is about 5.4 x 10-2 -1.1 x 10- 3.
Groundwater chemical composition and ionic relationships are as well discussed in this paper. Each of the aquifers is characterized by its own water quality.
Abdul Rahman Orainy and Taisir Abdallah
The use of computers in Saudi Arabia is growing rapidly. Thousands of computers are being installed in various schools around the country. Yet there is no reliable way of measuring changing attitudes towards computer use. Therefore, this study was undertaken to determine the usefulness of the Attitudes Toward Computer Usage Scale (ATCUS) in Saudi Arabia , its factorial validity and reliability were examined. The sample consisted of 210 undergraduates students from King Saud University. Results indicated that the (ATCUS) is a convenient, reliable and valid measure of computer attitudes in Saudi Arabia and it can be confidently and effectively employed in research and program evaluation contexts.
A.M. Attalla
Field experiment was conducted during 1985 and 1986 using sultani fig trees grown in Sidi Krare orchard (about 30 km west of Alexandria , Egypt). Eight fertilization treatments were as follows:
1. Control (without fertilization ).
2. 1 kg super phosphate (15% P20 S) + 1 kg potassium sulphate (48-50% K2O)/tree.
3. 1 kg super phosphate + 1 kg potassium sulphate + 0.5 kg N/tree (from commercial urea 46.5% N).
4. 1 kg super phosphate + 1 kg potassium sulphate + 0.5 kg N/tre.e (from urea forte 46.5% N + micro nutrients).
5. 1 kg super phosphate + 1 kg potassium sulphate + 0.5 kg N/tree (from ammonium sulphate 21% N).
6. 1 kg super phosphate + 1 kg potassium sulphate + 1.5 kg N/tree ([rom commercial urea).
7. 1 kg super phosphate + 1 kg potassium sulphate + 1.5 kg N/tree (from urea forte).
8. 1 kg super phosphate + 1 kg potassium sulphate + 1.5 kg N/tree (from ammonium sulphate).
Applying 1.5 kg N from commercial urea to fig trees significantly increased the yield per tree than those of 1st, 4th , 5th and 8th treatments in 1985 and 1986.
The higher level of nitrogen (1.5 kg) from different sources of fertilizers and lower level (0.5 kg) from ammonium sulphate significantly decreased TSS as compared with other treatments in 1985, whereas in 1986 the higher values were obtained from adding 0.5 kg and 1.5 kg N from urea forte (4th and 7th treatments). In general, nitrogen fertilization from different sources increased acidity as compared with those of 1st and 2nd treatments.
Aldryhim, Y.N. and Alyousif, A
Grain Silos and Flour Mills Organization (GSFMO) of Saudi Arabia is in charge of receiving fanner's annual yield of wheat grain that meet the standard specification established for wheat grain acceptance. In 1988 and 1989, 96 and 93% of the total wheat samples delivered were accepted respectively. Exceeding dockage content (max. limits 12%) was the most important reason for rejection, followed by insect infestation. The major components of dockage were barley (39%), wheat broken kernels (22.5%), shrunken kernels (19.2%), and weed seeds (15%). Four beetle species were detected in the infested samples. The most commonly occurring species was Tribolium castaneum (Herbst) . The number of insects per 1 kg was relative low and was correlated with period of storage , and percentage of dockage. A discriminant analysis was used to differentiate between free infested and infested samples on the basis of five discriminating variables (moisture content, dockage, test weight , protein content, and the length of storage in weeks). The accuracy of this formula was 89.9-100% and 84.6-86.3% for free infested and infested samples respectively. The percentage of moisture content of wheat grain was the most powerful factor in distinguishing the infested from free infested samples followed by dockage, test weight, protein content, and period of storage.
Fawzi M. Karim and Ahmed Al-Oqlah
Pollen morphological variation of representative species belonging to four polymorphic genera of the family Plumbaginaceae were investigated by using LM , SEM and TEM. Three groups of exine type of pollen grains were observed: finely reticulate , coarsely reticulate and gemmate - echinate. TEM revealed three layers as the exine i.e. tectum , columellae and foot layer, the tectum have additional structures such as spines or perforations. Intine forms a continuous layer. This emphasizes that pollen polymorphism is associated with other floral variable characteristics.
A.H. AlFarhan, M.M. Al-Farraj and A.S. Hajar
A check list of 98 wild edible plants belonging to 35 families are listed in alphabetical order. The plants collected in Saudi Arabia were dried, identified and kept in the herbarium for its nutrient value studies. Common English and Arabic names together with comments on the usage of the plants are also provided.
H. Elhag and L.G. Butler
Regenerable callus was obtained from immature embryos of high-tannin sorghum (Sorghum bicolor L. Moench) genotypes. Immature embryos collected 1 to 2 weeks after pollination produced high frequency regenerable callus when cultured on basal medium containing Murashige and Skoog (MS) inorganic salts, modified Gamborg (B5) vitamins and supplemented with 2,4- D (2 mg/L). Coconut water (Cw, 10%) and/or zeatin (2.2 mg/L) promoted callus production in certain genotypes. Frequent subculturing on the same medium under dark conditions reduced pigment formation. The genotypes differed in their ability to form callus as well as in subsequent regeneration. Shoots were obtained from nodular callus subcultured on the same basal medium supplemented with IAA (1.0 mg/L) and zeatin (2.2 mg/L). Casein hydrolysate, CH (1.0 g/L) enhanced shoot formation. The highest number of regenerated plants (70, 41, 18 and 17) were obtained in lines IS8768, G522A, BR64 and RTX430, respectively. These lines are rated high in tannin
Mahmud J.I. Abussaud and Fouad A. Almomani
An eleven months survey of the total bacteria and Agrobacterium of seven fields in three Jordan Valley nurseries showed significant differences between cultivated and non-cultivated fields at the same nursery, between cultivated fields in different nurseries and between non-cultivated fields in different nurseries. The total bacterial count had its highest value in April for most of the study fields (except a sterilized one); also the highest mean count of agrobacteria was in April at Baqura and Rayyan fields. Seventy-two strains of Agrobacterium were isolated; twenty-three of them belonged to biovar I, eighteen to biovar II, and thirty-one to biovar III; however only nine of them were pathogenic; seven of the pathogenic strains belong to biovar II, and two to biovar III.