Time filter

Source Type

Khartoum, Sudan

Al-Neelain University is a public university located in Khartoum, Sudan. It was founded in 1955. As of November 2004, Awad Haj Ali was the vice-chancellor of the university.The university is a member of the Federation of the Universities of the Islamic World. Wikipedia.

Abdallah T.M.,Kassala University | Abdeen M.T.,University of Khartoum | Ahmed I.S.,Kassala University | Hamdan H.Z.,Neelain University | And 2 more authors.
Malaria Journal | Year: 2013

Background: There have been few published reports on severe Plasmodium falciparum and Plasmodium vivax malaria among adults in Africa. Methods. Clinical pattern/manifestations of severe P. falciparum and P. vivax (according to World Health Organization 2000 criteria) were described in adult patients admitted to Kassala Hospital, eastern Sudan. Results: A total of 139 adult patients (80 males, 57.6%) with a mean (SD) age of 37.2 (1.5) years presented with severe P. falciparum (113, 81.3%) or P. vivax (26, 18.7%) malaria. Manifestations among the 139 patients included hypotension (38, 27.3%), cerebral malaria (23, 16.5%), repeated convulsions (18, 13.0%), hypoglycaemia (15, 10.8%), hyperparasitaemia (14, 10.1%), jaundice (14, 10.1%), severe anaemia (10, 7.2%), bleeding (six, 4.3%), renal impairment (one, 0.7%) and more than one criteria (27, 19.4%). While the geometric mean of the parasite count was significantly higher in patients with severe P. vivax than with severe P. falciparum malaria (5,934.2 vs 13,906.6 asexual stage parasitaemia per μL, p = 0.013), the different disease manifestations were not significantly different between patients with P. falciparum or P. vivax malaria. Three patients (2.2%) died due to severe P. falciparum malaria. One had cerebral malaria, the second had renal impairment, jaundice and hypoglycaemia, and the third had repeated convulsions and hypotension. Conclusions: Severe malaria due to P. falciparum and P. vivax malaria is an existing entity among adults in eastern Sudan. Patients with severe P. falciparum and P. vivax develop similar disease manifestations. © 2013 Abdallah et al.; licensee BioMed Central Ltd. Source

Ahmed K.A.M.,Huazhong University of Science and Technology | Ahmed K.A.M.,Neelain University | Huang K.,Huazhong University of Science and Technology
Materials Chemistry and Physics | Year: 2012

Birnessite-type manganese oxide nanotubes and nanorods were synthesized via a calcination process using manganese acetate and potassium hydroxide as precursors in presence of polyethylene glycol-melamine-formaldehyde. As-prepared products were characterized by XRD, FT-IR, FE-SEM, TEM, SA-ED, HR-TEM, Brunauer-Emmett-Teller (BET) and TGA analyses. The influences of reaction temperature and time on the morphology of manganese oxide nanocrystals were investigated. The oriented attachment-thermodynamical (OA-TD) process is suggested to describe the transition from tube to rod structure. Their capability of catalytic degradation of safranin O was compared. The results indicate that birnessite-type manganese oxide nanotube has higher catalytic activity for than nanorod crystal in aqueous solution, because it has a larger surface area. The decomposition of safranin O follows pseudo-first order kinetics and is markedly affected by pH. © 2012 Elsevier B.V. All rights reserved. Source

Elkhalifah A.E.I.,Neelain University | Maitra S.,Maulana Abul Kalam Azad University of Technology | Bustam M.A.,Petronas University of Technology | Murugesan T.,Petronas University of Technology
Applied Clay Science | Year: 2013

Different alkali and alkaline earth cation forms of bentonite clay were exchanged with protonated mono-, di- and triethanolamine compounds, to study the effect of the exchanged ammonium cations on the structure characteristics, thermal behavior, surface properties and CO2 adsorption capacities of bentonite clay. The revolution of the interlayer structure characteristics, thermal properties, the specific surface area and elemental analysis were characterized by XRD, FTIR, TGA, BET and CHNS techniques respectively, while the CO2 adsorption capacities were gravimetrically measured by using magnetic suspension balance (MSB) equipment. It was found that the intercalation of ammonium cations into the interlayer space of bentonite clay induced a step change in its basal spacing, depending on their molar mass and the interlayer molecular arrangement. The presence of the characteristic IR peaks of amine compounds in the spectra of bentonite clay adsorbents modified by amines was qualitatively supported by the incorporation of ammonium cations in the interlayer space of bentonite, while the presence of C, H and N elements using CHNS technique was quantitatively confirmed by the intercalation process of amine compounds. It was also found that the molar mass of amines has an inverse effect on the amount of the adsorbed water (intensity), its desorption temperature (position) and the specific surface area of the synthesized materials. The CO2 adsorption capacities on all the studied bentonite clay adsorbents modified by amines were found to increase between 2.68 and 3.15mmol/g, compared to 0.93mmol/g for untreated bentonite at the studied temperature and pressure. As expected, bentonite clay modified with di- and triethanolammonium cations showed lower CO2 adsorption capacities than that treated with monoethanolammonium cations, due to their low specific surface area. © 2013 Elsevier B.V. Source

Background: Previous heart rate variability (HRV) studies in asthmatic subjects (AS) demonstrate predominance of parasympathetic drive concomitant with low HRV, which is against the general belief that enhanced parasympathetic modulation improves HRV. The aim of this study was to compare patterns of HRV and cardiac autonomic modulations of AS to healthy control subjects (HS). Methods: Eighty AS and forty HS were enrolled in the study. Asthma control test and spirometry were used to discriminate uncontrolled (UA) from controlled (CA) asthmatic patients. Natural logarithmic (Ln) scale of total power (TP), very low frequency (VLF), low frequency (LF) and high frequency (HF) were used to evaluate HRV. Normalized low frequency (LF Norm) and high frequency (HF Norm) were used to determine sympathetic and parasympathetic autonomic modulations respectively. Results: CA patients achieved significantly higher LnTP, LnLF, LnHF and HF Norm but lower LF Norm and LnLF/HF compared with UA patients (p < 0.05). Although CA patients showed increased HRV and augmented vagal modulation compared with HS, these findings were no longer significant following adjustment for mean heart rates and anti-asthma treatment. All measured HRV parameters were not significantly different in UA patients compared with the HS (p > 0.05). Conclusions: CA is associated with enhanced parasympathetic modulations and higher HRV compared with UA. However, neither CA nor UA patients had different autonomic modulations and/or HRV compared with HS. © 2015 Lutfi. Source

Ahmed Adllan A.,Neelain University | Dal Corso A.,International School for Advanced Studies
Journal of Physics Condensed Matter | Year: 2011

We test several ultrasoft pseudopotentials (US-PPs) and projector augmented-wave (PAW) data sets, calculating the bond lengths, the atomization energies and the frequencies of the vibrational stretch modes of various diatomic molecules. The US-PPs and the PAW data sets are constructed with the same recipe and using the local density approximation or the Perdew, Burke and Ernzerhof generalized gradient approximation for the exchange and correlation energies. We study the dimers H 2, N 2, O 2, F 2, Al 2, Si 2, P 2, S 2 and Cl 2 and several monohydrides, carbides, nitrides and oxides of boron, carbon, nitrogen, oxygen, fluorine, aluminum, silicon, phosphorus, sulfur, chlorine, iron and nickel. We find that US-PPs and PAW data sets constructed with the same parameters provide almost equivalent results for the bond lengths and the vibrational stretch frequencies while, for some molecules, the PAW method is superior to the US-PP method for the calculation of the atomization energies. Our geometries and vibrational frequencies are compared with the results present in the literature and obtained by localized basis sets. It is found that the agreement is very good, with discrepancies comparable to those due to the use of different localized basis sets. © 2011 IOP Publishing Ltd. Source

Discover hidden collaborations