Vol. 11 Issue 1
Talat Saeed, Faisal Abu Dagga and Maie Saraf
Locusts which invaded Kuwait during the 1988/89 winter were captured to evaluate for the risk to the health of the people who had consumed them. Residual pesticides were extracted from these insects and subjected to gas chromatographic analysis using fused silica capillary columns connected with electron capture and flame photometric detectors. The results showed that some chlorinated pesticides were present in the residues. More importantly, relatively high amounts of phosphorus-containing pesticides (sumithion and malathion) were detected in the residues. Since these pesticides are toxic to humans, there is a health risk in consumption of insects contaminated with the pesticides.
Salim S Al-Showiman, Ahmed A. BaOsman and Naser M. Alandis
Some N-alkyl imines and oximes were subjected to catalytic transfer hydrogenation in presence of ethanol or cyclohexane as a solvent. The solvents were found suitable as hydrogen donors for hydrogenolysis reaction of these imines in presence of palladium as a catalyst. The yields were high and the obtained amines were analysed by 1H and 11C NMR. The reaction mechanism suggested is represented in the Scheme.
A.A. Bakheit
In order to study the ground water potentialities in Wadi Abu Shih, twenty six vertical electrical soundings (YES) are measured using the AREM Terrameter SAS System. The obtained YES curves are quantitatively interpreted using software prepared by Zohdy (1989). The obtained results show the presence of two aquifers separated by a shale bed. The shallower aquifer lies al a depth ranging from 4 to 12 m, and a thickness ranging from 5 to 35 m. The deeper one, which is considered as a confined aquifer, has a depth ranging between 20 and 70 m and thickness between 20 and 70 m. The depth and thickness of the shale bed separating the two aquifers vary between 5 and 25 m and 10 and 110m respectively.
E.M. Abdelrahman and H.M. El-Araby
In the present paper, a simple numerical method is developed to estimate the depth of a buried spherical ore body from the zero points of the vertical magnetic anomaly. The depth determination problem from the characteristic distances has been transformed into the problem of finding a solution of a nonlinear equation of the form z = f(z). Procedures are also formulated to estimate the magnetization inclination and the magnetic moment of the sphere. The method is tested on theoretical data with and without random errors and also on a field example from Bankura area in West Bengal, India.
M.S. Garawi and H.A. Alhendi
In this work both the atomic emission and atomic absorption spectroscopic techniques have been used for the determination of the metallic constituents in seventeen wells of underground water in Al-Kaseem area (Saudi Arabia). and eleven elements were detected. It is found that the major constituents elements in these resources are alkali elements, and the total transient elements constituents did not exceed 1 mg/l. Also it is found that the quantity of alkali metals existing in the wells follow the sequence Na > Ca > Mg > K.
Samir M. Ismail
A method for estimating crop coefficients using tensiometer and neutron probe data was used. Data for a wheat field site were analyzed using this method to calculate wheat crop coefficients. Crop coefficients were developed for the Class A Pan, Radiation, Jensen-Haise. and Penman methods. The estimated crop coefficients were compared to those of Doorenbos and Pruitt (1977). The crop coefficient polynomial equations produced in this study are useful in estimating crop water requirements in AI-Qassim region.
A.M. AI-Omran and Omer El-Bassir
The variability of infiltration rate within a field is expected to be correlated with that of soil physical and chemical properties. Observations of infiltration rate along two transects made in a field comprised of calcareous loamy soil (Torripasamments) were measured together with some parameters affecting infiltration rate (clay, sand and silt content: bulk density: and CaCO,). State space approach was used to identify which of these parameters most affecting final infiltration rate and to improve the interpolation of the infiltration rate along the transects. Variability of final infiltration rate along the transects could be explained by the variability of bulk density or clay content using state space model of infiltration-bulk density and clay content. The results also show that the model could be used to estimate final infiltration rate with values of final infiltration rate considered missing at every other location along the transect when all observations of bulk density and clay % included. Adding other properties such as silt, sand, and CaCO, to the model did not improve the estimate of final infiltration rate.
H.A. Esechie
The yield and yield components of two varieties of soybean [Glycine max (L.) Merrill], Bossier and Improved Pelican were compared in two experiments in 1987 and in 1988 at a range of planting densities from 10 to 40 plants/m. The experimental design was a split plot randomized block with three replicates; plant density fonned the main plot treatments and the cultivars formed the sub plot. The optimum density of planting for Bossier, a determinate type was 20 plants/m while that of Improved Pelican, an indeterminate type, was 10 plants/m. Improved Pelican which was more susceptible to lodging showed greater yield reductions at higher densities than Bossier which was lodging resistant. Although number of branches per plant generally increased with increasing density, there was no significant density effect on the number of nodes per plant. Number of pods/plant, seeds/pod and seed weight decreased at high densities in 1987 as well as in 1988, indicating a consistent response across years.
Abdulwahab R. Hashem
Twenty four isolates species belonging to eleven fungal genera were isolated from soil samples of ten localities from the industrial Yanbu city, Saudi Arabia. Aspergilli were predominant and represented by six species. Number of Aspergillus flavus and A. niger colonies were predominant as compared to the other detected Aspergillus spp. Alternaria and Penicillium were represented by 3 species each. While, two species of Curvularia, Fusarium, Mucor and Ulocladium were isolated. Cladosporium, Drechslera, Neurospora and Rhizopus were represented by one species each. Soil type is sandy, alkaline and differs in the organic matter content, total soluble salts, moisture content and total metal content.
Fatma Hiekal and Mosaad Hilali
The surface microtopography of Paramphistomum microbothrium and Cotylophoron cotylophorum was studied by Scanning Electron Microscopy (SEM) to investigate their morphological characteristics. The tegument posterior or to the anterior third in P. microbothrium has wrinkles or folds encircling the body but in C. cotylophorum the tegument in the same area is smooth. P. microbothrium has concentric aggregation of dome-shaped papillae located at it's anterior third, while the corresponding location inC. cotylophorum is with button-like papillae.