Showing papers by "University of Jordan published in 1985"
TL;DR: In this article, the authors used scanning electron microscopy to examine the surface of the beads with and without sulphamethoxazole as a model drug and found that the release behavior was a function of calcium chloride concentration.
Abstract: Calcium alginate beads impregnated with sulphamethoxazole as model drug were prepared and characterized. Scanning electron microscope was used to examine their surface with and without the drug. The bead average diameter was 1.25mm and the sulphamethoxazole uptake by the beads was about half of the incorporated quantity. The release behaviour was followed using USP dissolution method. The effect on release of factors such as sodium alginate, calcium chloride concentration, pH, hydration and compression were studied. Sodium alginate concentrations had no pronounced effect on the release. The release was found to be a function of calcium chloride concentration. The higher the concentration the lower the release. The smaller the water content the lower the release from the beads. Compression of the beads yields a deformed beads with an increase in their release. Plain calcium alginate beads were not suitable for sulphamethoxazole loading. Sulphamethoxazole diffusion through calcium alginate film was ...
146 citations
TL;DR: Active inflammation of the gastroduodenal mucosa likely accounts for the symptoms in patients with non-ulcer dyspepsia and an endoscopically normal mucosa was more likely to be associated with a normal neutrophil count.
Abstract: Proper control and quantitation are important in the accurate evaluation of gastroduodenal inflammation in dyspeptic patients without ulcers or erosions as proved by endoscopy. The endoscopic findings and the gastroduodenal mucosal inflammatory cell count in 31 patients with nonulcer dyspepsia were compared with an age-matched group of 32 healthy controls. Endoscopy revealed similar mucosal changes and in similar frequency in both groups. Differential mucosal inflammatory cell count showed a statistically significant (P<0.001) increase in the neutrophil count in the gastric body, antrum, and duodenal cap of the dyspeptic group, as well as a slight but significant (P<0.05) increase in the round cell and eosinophil count of the duodenal mucosa alone. No correlation was found between the endoscopic changes and an increase in neutrophil count above a normal level determined by the healthy controls. However, an endoscopically normal mucosa was more likely to be associated with a normal neutrophil count. Active inflammation of the gastroduodenal mucosa likely accounts for the symptoms in patients with nonulcer dyspepsia.
87 citations
TL;DR: In this article, the authors assess the magnitude of phosphate pollution in the Jordanian sector of the Gulf of Aqaba, the distribution of total phosphorus, fluoride, calcium and calcium carbonate and their association with each other were determined in sediments collected from seven stations north and south of aqaba Port, which indicate that phosphate pollution is mainly localized in the vicinity of the loading berth although its influence may be detected in other areas along the coast.
39 citations
TL;DR: An unusual highly alkaline natural water (pH = 12.5) is recorded in adits and wells from the Maqarin area, northern Jordan as discussed by the authors, which is a calcium hydroxide-sulfate type of water rich in base metals concentration.
38 citations
37 citations
TL;DR: In this paper, the concentration of zinc, manganese, copper, cadmium, magnesium and iron in three species of red, four species of brown and three species green macroalgae, and also in sea water have been determined at two localities along the coast of Aqaba.
37 citations
TL;DR: Decomposition of the seagrass Halophila stipulacea (Forsk.) Aschers followed in situ over 340 days showed that the plant lost 40.8% of its initial weight during the first 85 days and only 21.2% over the remaining 255 days of the incubation period, indicating the high resistance of HalophILA tissue to decomposition.
31 citations
TL;DR: A review of the literature on lymphangiomas of the tonsils is presented in this paper, where only six well-documented cases have been previously reported and two additional cases with review of literature are presented.
Abstract: Benign tumours of the tonsils are uncommon. Among them, lymphangiomas are rare, and only six well-documented cases have been previously reported. We present two additional cases with review of the literature.
26 citations
TL;DR: Comparative examinations with Moller's decarboxylase medium using 122 Enterobacteriaceae strains demonstrated that the medium can also be used to prove the decar boxylation of lysine, ornithine and arginine.
23 citations
TL;DR: Ostracode faunas have been identified for the first time in Early marine Cenomanian sediments of the Ajlun Group (Jordan) outcropping East of the Jordan Rift Valley.
21 citations
TL;DR: A computationally convenient expression is presented for the error rate involved in digital data transmission in nonlinear channels with memory using a particular form of Volterra series representation.
Abstract: This paper considers the performance of digital data transmission in nonlinear channels with memory. The analysis is based on the application of a particular form of Volterra series representation for the nonlinear system describing the transmission channel. First, expressions are derived for the output mean and power spectral density under certain conditions. Next, the paper presents a computationally convenient expression for the error rate involved in such transmission.
TL;DR: Two test drugs, hydrochlorothiazide and phenylbutazone, were separately incorporated into a standard formulation to study their disintegration and dissolution properties as a function of compression force and a linear correlation between dissolution efficiency and the logarithm of force was found.
TL;DR: Monthly changes in the gonadosomatic index indicate that the main spawning season of Parupeneus barberinus in Aqaba extends from May to August for females and from may to June for males.
Abstract: Monthly changes in the gonadosomatic index indicate that the main spawning season of Parupeneus barberinus in Aqaba extends from May to August for females and from May to June for males. Males in the 4 years age-group (63–4%) and the 5 years age-group (65–1%) are predominant. The von Bertalanffy growth equation parameters calculated from mean total length data are: Lα= 32–8cm; K=0–225; (to=−0–73 for males and Lα= 32–7cm; K=0–206; to=−0.82 for females. The length-weight regression coefficients for males (2.85) and females (2.8) are not significantly different and they indicate a negative allometric growth. There is no significant change in condition factor with age.
TL;DR: The sand jird, Psammomys obesus, and the sandfly, Phlebotomus papatasi, the potential animal reservoir and vector of the disease respectively, were found in the affected area and Leishmania amastigotes were seen in smears from ears of seven out of 11 jirds collected from the area suggesting the zoonotic nature of the Disease there.
Abstract: At least 193 cases of cutaneous leishmaniasis occurred in eight villages of Mowaqqar area, Jordan, between December 1982 and April 1983. Peak transmission of the disease is thought to have taken place in late summer 1982. Approximately 67% of the cases were below 15 years of age and the lesions seen were of the dry type. The sand jird, Psammomys obesus, and the sandfly, Phlebotomus papatasi, the potential animal reservoir and vector of the disease respectively, were found in the affected area. Furthermore, Leishmania amastigotes were seen in smears from ears of seven out of 11 jirds collected from the area suggesting the zoonotic nature of the disease there.
TL;DR: The food habits of the goatfish, Parupeneus barberinus, from Aqaba were studied and seasonal variations were observed in relation to food consumption, percentage weight composition and intensity of feeding.
Abstract: The food habits of the goatfish, Parupeneus barberinus, from Aqaba were studied. A total of 166 fish over a range of 15 to 27.7 cm and representing five age groups were examined. The major dietary components, based on occurrence, were crustaceans (82.6%), sand (71.1%), foramniferans (55%), detritus (52.3%) and polychaetes (49%). Based on gravimetric analysis, crustaceans and sand were the major food components comprising 54.4% and 23.3% of the total food weight respectively. The food consumption decreased from 1.5% of body weight in the 2-year group to 0.3% of body weight in the 6-year group. Seasonal variations were observed in relation to food consumption, percentage weight composition and intensity of feeding.
TL;DR: In this paper, the role of F1 in distinguishing the uvular and pharyngeal fricatives was investigated for Jordanian Arabic speakers, and the results of these tests agree with the model proposed by Stevens and Klatt relating the values of the lower four formants to the place and degree of constriction in the back cavity during the production of back consonants.
TL;DR: The germination of wheat grains was delayed, and the development of wheat seedlings was decreased in laboratory experiments by both shoot and rhizome extract, the inhibitory effect of both extracts was most pronounced at 20°C compared with 10 or 15°C.
Abstract: Summary
The allelopathic effect of Salvia syriaca L. (Syrian sage) was examined against wheat in glasshouse and laboratory experiments. The germination of wheat grains was delayed, and the development of wheat seedlings was decreased in laboratory experiments by both shoot and rhizome extract. The inhibitory effect of both extracts was most pronounced at 20°C compared with 10 or 15°C. Shoot extracts had more drastic effects than the rhizome extract on germination percentage, shoot and root lengths. In glasshouse experiments fresh and dried shoot of S. syriaca added to soil drastically decreased germination and development of wheat.
Rasuma
Influence allelopathique de Salvia syriaca L. en culture de ble
L'influence allelopathique de Salvia syriaca L. vis-a-vis le ble a fait l'objet d'etudes en serre et au laboratoire. La germination du ble a ete retarde et le developpement des jeunes plants reduit par des extraits de pousse et de rhizome. L'inhibition provoquee par les deux extraits a ete plus marquee a 20°C qu'a 10 ou 15°C au laboratoire. Les extraits de pousse ont produit des effets plus violents que ceux de rhizome sur le pourcentage de germination et la longueur des pousses et des racines. En serre, des pousses fraiches ou sechees de S. syriaca, additionnees au sol, ont amene une reduction spectaculaire dans la germination et le developpement du ble.
Zusammenfassung
Allelopathische Wirkung von Salvia syriaca in Weizen
Die allelopathische Wirkung von Salvia syriaca L. in Weizen wurde in Gewachshaus- und Laborversuchen studiert. In Laborversuchen fuhrten Spross- und Rhizomextrakte zu einer Verspatung des Keimens und einer reduzierten Entwicklung der Weizenkeimlinge. Die hemmende Wirkung beider Extrakte war bei 20°C starker als bei 10 und 15°C. Sprossextrakte hatten eine starkere negative Wirkung als Rhizomextrakte auf die prozentuale Keimung and die Lange der Wei-zensprosse und -wurzeln. Wurden frische und getrocknete Sprosse von S. syriaca im Gewachshaus dem Boden zugefugt, so wurde die Keimung und die Entwicklung der Weizenpflanzen stark reduziert.
TL;DR: The evidence that the Dead Sea rift has existed as a zone of crustal weakness since Precambrian time is critically examined based on the distribution and abundance of dykes and the distribution of the Lower Cambrian basal conglomerates as mentioned in this paper.
Abstract: The evidence that the Dead Sea rift has existed as a zone of crustal weakness since Precambrian time is critically examined based on (i) the distribution and abundance of dykes in the Precambrian basement and (ii) the distribution of the Lower Cambrian basal conglomerates. It is shown that dyke and clastic sediment occurrence is not preferentially associated with the modern rift zone, and thus that some earlier tectonic interpretations must now be discounted.
TL;DR: The formation of dikes in southwest Jordan took place during the late Proterozoic and represents the subsequent magmatic activity of the Pan-African orogeny as discussed by the authors, where the copper is originally incorporated in silicates and has been enriched along flow lines and vesicules by autometasomatism.
TL;DR: In this article, the authors used birefringence and elastic moduli to assess the observed physical anisotropy as a function of chain orientation by die swell and thermal expansivities measured parallel and perpendicular to the draw direction.
TL;DR: Both uranium tetrachloride and dichlorodioxouranium(VI) react with lithium alkyls in polar and non-polar solvents to form (presumably) the thermally unstable ‘UR 4 ’ and ‘UO 2 R 2 ’ species respectively, which upon warming to room temperature both decompose by β-hydride elimination as discussed by the authors.
TL;DR: Cardiac failure was the most frequent cause of hepatomegaly in this sample of Jordanians, followed by malignancy and cirrhosis of the liver, and inflammatory processes were the second major cause.
Abstract: Eight hundred Jordanians with liver enlargement were studied: 369 (46%) were males and 431 (54%) females. Ages ranged between 13 and 85 years, with a mean of 47·4%: 766 cases demonstrated a single pathological process while 34 cases showed two or more processes.The most significant findings were: congestion secondary to cardiac failure in 323 cases (38·5%); inflammatory and parasitic processes in 192 cases (22·9%), including acute hepatitis (81 cases), hydatid cyst (63 cases), chronic hepatitis (27 cases), liver abscess (19 cases), brucellosis (one case) and malaria (one case); malignancy in 164 cases (19·6%); liver cirrhosis in 80 cases (9·5%); fatty metamorphosis in 47 cases (5·6%); metabolic and genetic disease in 11 cases (1·3%); miscellaneous conditions in nine cases (1·1%); and 15 apparently normal individuals (1·8%).Cardiac failure was the most frequent cause of hepatomegaly in this sample of Jordanians. Inflammatory processes were the second major cause, followed by malignancy and cirrhosis of the...
TL;DR: The effect of numerous processing factors such as mixer geometry and design, power input, time of dry and wet mixing on the content uniformity of tablets containing potent drugs have been studied as discussed by the authors.
Abstract: The effect of numerous processing factors such as mixer geometry and design, power input, time of dry and wet mixing on the content uniformity of tablets containing potent drugs have been studied. Cohesive drug powders and excipients have been used.Results show that pharmaceutically acceptable hamageneity is achieved after dry mixing far 7 hours in the Lodige-Marton mixer. It is shown that there is no significant improvement of homogeneity on increasing the time of wet mixing in excess of 5 minutes, and the rate of breakdown of the drug agglomerates and dispersion of individual particles, under the experimental conditions, is very slow. The high energy input exerted by ball milling markedly improves the homogeneity of the powder mixes and the content uniformity of tablets. After 15 minutes of dry mixing, the state of homogeneity of the powder mix containing cohesive drug powder in minute amounts in cohesive excipient is not influenced by the type of mixer.
TL;DR: In this article, notions of the state in contemporary Arab-Islamic writings are discussed and discussed in the context of the International Spectator: Vol. 20, No. 2, pp. 33-50.
Abstract: (1985). Notions of the state in contemporary Arab‐Islamic writings. The International Spectator: Vol. 20, No. 2, pp. 33-50.
TL;DR: The results indicate that mainly heat-labile and cell-associated cytotonic and cytotoxic factors appear to influence the enterotoxigenic potential of this heterogenous group of non-O1 vibrios.
Abstract: Whole cultures, but not culture supernatant fluids, of 21 isolates of non-O1 V. cholerae from patients with diarrhea were shown to induce positive fluid accumulation in infant mice. CHO cell assays demonstrated the elaboration of heat-labile cytotonic, cytotoxic or both factors from most isolates when grown under optimal culture conditions. These factors were not neutralized by anti-cholera toxin serum. Also genetic studies performed on 9 vibrio isolates using a DNA hybridization probe failed to detect gene sequences homologous with cholera toxin. ELISA assays recognized six isolates which produced a cell-associated substance which immunologically cross-reacted with cholera toxin. Enzymatic profiles of the vibrio isolates did not correlate with the production of any toxic factor. The results indicate that mainly heat-labile and cell-associated cytotonic and cytotoxic factors appear to influence the enterotoxigenic potential of this heterogenous group of non-O1 vibrios.
TL;DR: In this article, the design and implementation of a satellite transponder's channelizing filter of degree 6 is discussed, in particular, the construction of the transmission coefficient, the synthesis procedure and the realization are discussed.
Abstract: In this paper some issues concerning the design and implementation of a satellite transponder's channelizing filter of degree 6 are discussed. In particular, the construction of the transmission coefficient, the synthesis procedure and the realization are discussed. the amplitude and the group delay responses of the filter are optimized simultaneously to meet prescribed requirements. the prototype filter has been synthesized as a cross-coupled array. Explicit formulae for the element values in terms of the real and the imaginary parts of the poles of the transmission coefficient are derived. Single mode direct coupled cavity realization with positive and negative couplings has been developed. an experimental filter has been constructed, the measured responses are very close to the computed ones.
TL;DR: One hundred and forty-two patients were admitted to the Jordan University Hospital with acute epididymitis between 1973 and 1983 and sixty-five had intravenous urograms which revealed renal tuberculosis in 1 patient.
Abstract: Summary— One hundred and forty-two patients were admitted to the Jordan University Hospital with acute epididymitis between 1973 and 1983. Sixty-five had intravenous urograms which revealed renal tuberculosis in 1 patient, renal or ureteric stones in 10, bladder neck obstruction in 3, unrelated congenital anomalies in 10 and no abnormalities in 41.
Twelve patients developed epididymal abscesses.
TL;DR: This paper develops an appropriate noise loading technique for the assessment of nonlinear distortion in FDM systems under high-frequency operation by employing a general Volterra-based model.
Abstract: This paper investigates the characterization of nonlinear distortion produced in FDM systems under high-frequency operation, by using noise loading techniques. By employing a general Volterra-based model, the paper develops an appropriate noise loading technique for the assessment of nonlinear distortion in such wide-band transmission systems. The advantage of using Volterra series representation is that it takes account of system nonlinear-memory behavior in a combined formulation.
15 May 1985-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
Abstract: While the 16O(d, α) nuclear reaction is the best nuclear reaction method for high resolution oxygen depth profiling, its use has been hampered by interfering reactions and electronic pulse pile-up. Employing a Si detector of 22 nm thickness, target tilting and a pulse pile-up rejection circuit with a pulse-pair resolution of 30 ns has made fast routine measurements easy. A depth resolution of 13 nm has been obtained and one of 5 nm appears feasible. Depending on the target composition, a detection sensitivity of down to 0.01 at.% oxygen is realizable.
TL;DR: The ease of employing energy dispersive x-ray fluorescence (EDXRF) analysis to studies relating to the metal content of soils and the metal uptake in plants has been demonstrated in an investigation concerning the effect of automative pollution on the abundance of 12 elements accumulated in the leaves of palm trees and in the surrounding soil as discussed by the authors.