Investigation of the Antimicrobial Activity Of Essential Oils Of Cymbopogon nervatus and Cuminum cyminum

The antifungal activity of eight essential oils, namely: Cyperus rotandus, Baswellia papyrifera, Eucalyptus camaldalensis, Cymbopogon schoenanathu, Citrus paradises, Cymbopogon nervatus, Ocimum basilicum and Cuminim cyminum was investigated using Agar Well Diffusion Assay on (SDA) medium. Two essential oils showed relatively high antifungal activity on the hyphal growth of Aspergillus niger and...

Biochemical, Serological and Molecular Characterization of Salmonella spp. Isolated from Poultry in Khartoum State

A total of 38 Salmonella isolates were recovered from 679 specimens collected within Khartoum State. The specimens included tissues, intestinal contents , eggs and swaps from poultry farms and vendors of asymptomatic poultry as well as poultry feed and drinking water from poultry farms watering systems. The isolates were confirmed to be Salmonella enterica subspecies enterica by biochemical...

Past and Present Vegetation of Musawarat Elsufra (An Archeological Site in Northern Sudan)

This research was carried out in Musawarat El Sufra an archeological site 180 km. north of Khartoum, to compare the past and present vegetation of the area. Standard sampling methods were applied to study the vegetation cover. Two field surveys were conducted in 2005 and 2006.Three quadrats (50x50m) were chosen to investigate the present vegetation by taking the mean of 20 small quadrats...

Numerical Taxonomic Study of Legume Nodulating Bacteria

Forty-five isolates of both indigenous and imported rhizobia (from different cross-inoculation groups) were characterized using 114 different taxonomic traits. Cross-inoculation experiments showed a wide range in the degree of host X isolate efficiency. This was reflected by variations in number of nodules, shoot dry weight and nitrogen content produced by the same host when inoculated by...

Studies on Natural Sweeteners from Some Sudanese Plants

Fifteen inbred lines of Sorghum bicolor (sweet sorghum) cane were evaluated for their sugar content at different developmental stages. Cucumis pustulatus, C. prophetarum, Abrus precatorius and Salvadora persica were screened for low calorie natural sweeteners, and the chemical characters for the isolated sweeteners were recorded. Sorghum bicolor stem juice showed a large increase in the...

Diversity and Cross Infestation AbilitiesAmong Different Striga hermonthica (Del.)Benth, Populations in the Sudan

Study was conducted to investigate the physiological, histological and genetic variability within Striga hermonthica populations collected from under sorghum, millet and maize. In this study physiological variability within populations was based on response of seeds to root exudates of sorghum, millet and maize and on induction of haustoria and sustainable development of Striga on the three...

A Study on the Ecological Group Coprophilous (Dung) Fungi in Khartoum

Forty goat and donkey dung samples were collected from an animal farm in Khartoum during the period November 2004 and December 2005, to examine and verify coprophilous fungi diversity and succession under seasonal environmental conditions in Khartoum. Collected samples were incubated in humid chambers at laboratory temperatures 28°C. ± 5 The effects of dung moisture content, relative humidity,...

Phytochemical and Biological Investigations on Essential Oils of Six Sudanese Medicinal Plants

Six Sudanese aromatic plant species were extracted by the hydrodistillation method using Clevenger-type apparatus. Plants species and the extracted parts were; fruit peels of Lime, sweet orange and grapefruit; aerial parts of mint; leaves and inflorescences of basil and leaves camphor. Yields and colours of the essential oils of these plants were recorded. The extracted oils were subjected to...

Pollen Morphology of Selected Plants from Erkwit (Eastern Sudan)

Pollen morphological descriptions and photographic illustrations based on light microscope analysis are provided for 30 species belonging to 18 families from Erkwit area in the eastern of Sudan. The pollen characteristics among species in the same family are similar to each other. The results indicate that pollen characters may be significant in taxonomical studies. The effect of various...

A study on the flora of Tuti Island in Khartoum state

This work is a field research to study the present-day Flora of Tuti Island North Khartoum State. It is a descriptive taxonomical study. The study includes a brief description of the study area: location, topography, geology, geomorphology, agriculture, climate and types of soils and general account on the vegetation of the whole region. A total number of 130 species belonging to 107...