Search
Now showing items 231-240 of 451
The Likelihood Function For A Progressive Disease Model With A Bivariate Survival Function
(
Qatar University
, 1995 , Article)
A model for the natural history of a progressive disease is developed. The model has three disease states and can be expressed as the joint distribution of two survival random variables. Covariate information is incorporated ...
Constituents of plants growing in qatar xxiii. Flavonoids of francoeuria crispa
(
Qatar University
, 1993 , Article)
Investigation of the flavonoid constituents of Francoeuria crispa, resulted in the isolation and identification of four flavonoids: quercetin, qucrcetin-3-O-gIucoside, quercetin-7-0-glucoside and quercetin-3-methyl ether.
The Adjoint Problem Of A Modified Sturm-Liouville Boundary Value Problem
(
Qatar University
, 1993 , Article)
The authors give the solutions of the eigenvalue equation that is associated with a modified Stum-Liouille problem. The discrete specturm and hence the resolvent will be obtained by means of different types of solutions ...
Growth and production of tropane alkaloids by cell suspension cutures of hyoscyamus albus L.
(
Qatar University
, 1990 , Article)
Cell suspension of Hyoscyamus albus L. were investigated for growth and production of tropane alkaloids in three different media. The effects of sucrose concentration and initial pH were also studied. 2,4- Dichlorophenoxyacetic ...
Electron microscopic and autoradiographic analysis of the distribution of the vagus nerve in the ferret stomach
(
Qatar University
, 1999 , Article)
In this study, tritiated leucine was injected into the vagal dorsal motor nucleus after acute and chronic partial vagotomy. The method of sampling of the stomach, application of % 2 test and the analysis of the electron ...
Scanning electron microscopy of the egg-shell of the fly synthesiomyia Nudiseta (wulp)
(
Qatar University
, 1994 , Article)
The ultrastructure of the egg-shell of the fly Synthesiomyia nudiseta has been studied by scanning electron microscopy. The surface of the outer chorion is highly ridged, grooved and has a reticulate appearance except at ...
Ultrastructural Study Of Type "B" Neurosecretory Cells In The Earthworm Nervous System
(
Qatar University
, 1991 , Article)
Neurosecretory cell types Bi—B5 are widely distributed throughout the cerebral, subesophageal, nerve cord and peripheral ganglia of the oligochaete Aporrectodea caliginosa, Lumbricus terrestris, Eisenia foetida, Octolasion ...
Towards a prospective transplantation of the local mangrove avicennia marina (forssk.) Vierh. Growing on coast of qatar i. Ecophysiological performance of juveniles.
(
Qatar University
, 1990 , Article)
A population sample of propagules was collected at random from average size A. marina trees growing at "Dhakhira" (Qatar). This sample was then divided into subsamples which were used to detect the effects of light intensity, ...
Algae Along Qatar Coasts Utilization And Future Prospects
(
Qatar University
, 1999 , Article)
Most of marine algae have no equivalent on earth and therefore could be considered as irreplaceable sources of primary and secondary metabolites. This is especially the case for hydrocolloids from red and brown algae that ...
Progress Of Ocean Sciences In India
(
Qatar University
, 1999 , Article)