Showing papers by "University of Jordan published in 1980"
TL;DR: The authors believe that the significantly different epidemiologic and morphologic features of colorectal cancer demonstrated in these two communities could shed light on possible etiologic influences, such as dietary habits or other environmental factors.
Abstract: A comparative study of colorectal adenocarcinoma was undertaken among the populations of Jordan and Nova Scotia, Canada. The incidence of this cancer was 13 (colon 6, rectum 7) and 53 (colon 31, rectum 22) per 100,000 males aged 35--64 years, respectively. Colonic tumors (excluding rectosigmoid) showed left-sided preponderance in Jordanians and right-sided preponderance in Nova Scotians. Age average at diagnosis was 49 years in Jordanians (colon 47 years and rectum 50 years) and 66 years in Nova Scotians (colon 67 years and rectum 63 years), with peaks in the fifth and seventh decades and a male to female ratio of 1.3:1 and 1:1, respectively. The mucinous type accounted for 31 and 13% of colorectal adenocarcinomas in Jordanians and Nova Scotians, respectively, of which the signet-cell type accounted for 14 and 2% of the total number, respectively. The actual incidence rate of mucinous carcinoma, however, was higher among Nova Scotians. In both groups, mucinous carcinoma showed predilection for females and rectal signet-cell carcinoma showed bias toward younger females. The authors believe that the significantly different epidemiologic and morphologic features of colorectal cancer demonstrated in these two communities could shed light on possible etiologic influences, such as dietary habits or other environmental factors.
42 citations
TL;DR: In this paper, a multipeak-resolution method was used to measure the crystallinity and birefringence of eight types of native Egyptian cotton, and remarkable variations in crystallinity were found.
Abstract: Crystallinity and crystallite size of eight types of native Egyptian cotton have been measured by the multipeak-resolution method of Hindeleh and Johnson. Remarkable variations in crystallinity were found—it ranges between 69 and 53%—while the crystallite size normal to the 002 planes ranges between 4.1 and 3.6 nm.A sample that possesses higher values of crystallinity and birefringence is characterized by higher values of breaking tenacity and stiffness and by a lower value of breaking elongation. The finest fiber (Guiza 45) has the best structural parameters and tensile properties.Although the crystallinity and birefringence are highly correlated with the physical properties, the birefringence correlation is more significant.
36 citations
TL;DR: In this paper, the analysis of the x-ray diffraction trace of viscose rayon by the correlation- crystallinity index method for routine assessment of crystalline order in samples composed of cellulose II, and by the multipeak-resolution method for special analysis of crystallinity and crystallite size in sample composed of either cellulose only or cellulose 2 + cellulose IV.
Abstract: The paper suggests the analysis of the x-ray diffraction trace of viscose rayon by the correlation- crystallinity index method for routine assessment of crystalline order in samples composed of cellulose II, and by the multipeak-resolution method for special analysis of crystallinity and crystallite size in samples composed of either cellulose II only or cellulose II + cellulose IV. Sets of samples of viscose rayon produced under controlled conditions are x-ray characterized, the tensile properties are measured, and the significance of crystallinity on tensile properties is sought.
36 citations
TL;DR: Since vinca alkaloids were introduced for clinical use, several side effects associated with vincristine therapy have been reported; neurotoxicity is the most frequent of the side effects.
Abstract: Excerpt To the editor: Since vinca alkaloids were introduced for clinical use, several side effects associated with vincristine therapy have been reported; neurotoxicity is the most frequent of the...
35 citations
TL;DR: In this paper, optical diffraction profiles obtained from computer-drawn masks which simulate the effects of both size and distortion, have been used to evaluate Scherrer (K) parameters in terms of the ratio of true crystalite size to apparent crystallite size.
30 citations
TL;DR: In this paper, a study in the Benson area, Arizona showed that piping commonly develops in alluvial deposits in the vicinity of arroyo-cuts and deeply incised gullies actively trenching in the flood plain deposits.
Abstract: Summary Piping is a subsurface form of erosion which involves the removal of subsurface soils in pipe-like erosional channels to a free or escape exit. Although it develops in different types of soils and under a wide range of physico-chemical conditions, piping materials are commonly highly erodible. The present study in the Benson area, Arizona shows that piping commonly develops in alluvial deposits in the vicinity of arroyo-cuts and deeply incised gullies actively trenching in the flood plain deposits. It shows also that soils susceptible to piping usually comprise silts and silty sands with a low clay content, and that they are generally of low dry density, high void ratio, and have collapsing properties. It was found that overgrazing the area of study in the past and misuse of the land, combined with the climatic conditions of long dry summers with intermittent short rain storms, have contributed to the initiation and development of piping erosion. Gully erosion and badland topography are quite extensive in the area of study due mainly to the collapse of the pipes at an advanced stage of their development.
29 citations
TL;DR: The thermal behavior of Jordan oil shale has been studied in a DTA apparatus in an He atmosphere as mentioned in this paper, where both untreated and decarbonated shale exhibited two distinct endothermic peaks related to the softening and evolution of organic matter, and the effect of particle size on the DT curves was studied and showed a drift from zero base line.
28 citations
TL;DR: Optically active ethyl-phenyl-phosphinous acid diethylamide 1 was treated with HCl, HBF4, alcohols, thiols, carboxylic acids, esters, anhydrides, acid chloride, compounds with the structure element P[sbnd]Cl and secondary phosphines to give in each case a racemic mixture of the corresponding, previously described, reaction products.
Abstract: Optisch aktives Ethyl-phenyl-phosphinigsaurediethylamid 1 wird in racemische literaturbekannte Verbindungen uber-gefuhrt bei der Einwirkung von HCl, HBF4, Alkoholen, Thioalkoholen, Carbonsauren, Carbonsaureestern, Carbonsaureanhydriden, Carbonsaurehalogeniden, Verbindungen mit Pl und sekundaren Phosphinen. p-Kresol, Trifluoressigsaure-p-kresylester sowie Trifluoressigsaure-s,s,s-trifluorethylester setzen sich mit optisch aktivem Ethyl-phenyl-phosphinigsaure-diethylamid 1 unter Erhaltung der Konfiguration zu den entsprechenden optisch aktiven Ethyl-phenyl-phosphingsaureestern um. Optically active ethyl-phenyl-phosphinous acid diethylamide 1 was treated with HCl, HBF4, alcohols, thiols, carboxylic acids, esters, anhydrides, acid chloride, compounds with the structure element P[sbnd]Cl and secondary phosphines to give in each case a racemic mixture of the corresponding, previously described, reaction products. Reaction of optically active 1 with para-cresol, para-cresyltrifluoro-acetate or 2,2,2-tri...
22 citations
TL;DR: Optisch aktive Phosphinigsaureamide R1R2PNR2 4 (R1 [dbnd] Ph, R2 [ dbnd] Me bzw.
Abstract: Optisch aktive Phosphinigsaureamide R1R2PNR2 4 (R1 [dbnd] Ph, R2 [dbnd] Me bzw. Et, R [dbnd] Et) sind durch kathodische Spaltung bzw.Cyanolyse optisch aktiver Amidophosphoniumsalze [R1R2R3PNR2]X (R...
21 citations
TL;DR: Many landslides have occurred at slope cuts-embankments adjacent to the Amman-Na'ur-Dead Sea and Irbid-Jerash-Amman highways in Jordan, especially during the last four years that were characterized by exceptional raifall during winter as discussed by the authors.
Abstract: Many landslides have occurred at slope cuts-embankments adjacent to the Amman-Na'ur-Dead Sea and Irbid-Jerash-Amman highways in Jordan, especially during the last four years that were characterized by exceptional raifall during winter. Clayey beds found in the foundations of the failing areas were responsible for the occurrence of these landslides.
19 citations
TL;DR: In this paper, it was shown that some nodular limestones in Jordan were originated by burrowing organisms of the types Thalassinoides, Callianassa or Ophiomorpha and they were filled by early diagenetic stochiometric dolomite or chert.
TL;DR: The theory of very thin, nonideal multilayer stacks is developed, and the computed wavelength variation of the transmissivity and reflectivity is compared with that measured on experimentally prepared silver-silicon monoxide layer stacks.
Abstract: In this study, the theory of very thin, nonideal multilayer stacks is developed, and the computed wavelength variation of the transmissivity and reflectivity is compared with that measured on experimentally prepared silver-silicon monoxide layer stacks. The model imputes a step-function character to the complex index of refraction along the layer structure, and nonideality is accounted for by allowing for the likely presence of interfacial layers between each primary layer pair and also for the possibility that the thickness of the individual layers may vary randomly within some limit of error. Abeles's transfer matrix technique is used to arrive at the characteristic matrix of the stack, and additive corrective matrices are derived to account for the effects due to interfacial layers and the random layer thickness variation.
TL;DR: In this paper, isothermal kinetic data were obtained for the dissolution of Jordan oil shale in a hydrogen-donating solvent (1,2,3,4-tetrahydronaphthalene) in the temperature range 229-315 °C for untreated (as received mf) shale and 230-360°C for decarbonated shales.
01 Jan 1980
TL;DR: The findings indicate that the Jordanian emigrants are mainly young males from the Amman District, most of whom have obtained the secondary school certificate, and only 41 percent of the emigrants left Jordan to work abroad.
Abstract: The author uses a log-linear model to analyze data from the Multipurpose Household Survey Jordanians Abroad 1975. This survey consisted of a six percent multistate stratified random sample of households in the East Bank of Jordan in 1975. Data are included on members of households living abroad reasons for migration country of residence and selected demographic characteristics (ANNOTATION)
TL;DR: Two multiparous patients were cured of hyperprolactinaemia with galactorrhoea and amenorrhoeA by surgical removal of a benign ovarian teratoma.
TL;DR: The study has shown changing patterns and trends of abuse of illicit drugs and licit psychoactive drugs obtained on prescription and the incidence of licit drug abuse has been rising steadily in recent years.
01 Jan 1980
TL;DR: In this article, a hydrodynamic voltammetrric method was developed to determine the concentration of atmospheric nitrogen dioxide in 0.1M NaOH scrubbing solution which converted NO2 to NO2 and NO3 in a fixed stoichiometric ratio.
Abstract: A hydrodynamic voltammetrric method was developed to determine the concentration of atmospheric nitrogen dioxide. Air samples were collected in 0.1M NaOH scrubbing solution which converts NO2 to NO2 and NO3 in a fixed stoichiometric ratio. The produced NO2 ion was analyzed by hydrodynamic