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Articles by A. Ibrahim
Total Records ( 6 ) for A. Ibrahim
  M.S. Auwal , K.A. Sanda , I.A. Mairiga , F.A. Lawan , A.A. Mutah , A.N. Tijjani , A. Shuaibu , A. Ibrahim , A.B. Njobdi and A.B. Thaluvwa
  The phytochemical, elemental and hematologic effect of the crude mesocarp extract of Hyphaene thebaica (doumpalm) in wistar albino rats to ascertain the claims by herbalists and traditionalists in the management of anemia was evaluated. The Phytochemistry revealed the presence of tannins, saponins, steroids, carbohydrates, cardiac glycosides, flavonoids, terpenes and terpinoids in low and moderate concentrations. Alkaloids, phlobatannins and anthraquinones were absent. The elemental analysis of the extract revealed the presence of calcium, magnesium, potassium, iron and sodium in moderate concentration when compared to WHO concentration in ppm. The amount of manganese, zinc and silicon is low, whereas the amount of nickel, cobalt, molybdenum, arsenic and lead is negligible. There is significant (p<0.05) increase in red blood and white blood cells production at 1-4 weeks of extract administration, while parked cell volume and hemoglobin concentration increased at the second and third week of oral administration of 400, 600 and 800 mg kg-1 for four weeks of the extract respectively. This research have therefore supported the folkloric claims by traditionalists and herbalists in application of the crude mesocarp extract of Hyphaene thebaica (doumpalm) in the management of anemia in Askira/Uba, Maiduguri and other Local Government areas in Borno State, Nigeria.
  H. El-Enshasy , A. Daba , M. El-Demellawy , A. Ibrahim , S. El Sayed and I. El-Badry
  In the recent years, mushroom derived active metabolites have emerged as an important class of bioactive compounds with several therapeutic applications. Most of the production methods were based on cultivation of mushroom on solid substrate in controlled temperature green house. For the production of bioactive compounds for therapeutic application, production should be carried out under sterile and well controlled condition. Thus, the interest of cultivation of mushroom in bioreactors for bioactive compound production was increased during the last few years. In the present study, mushroom cells were cultivated in submerged culture for the overproduction of anticancer exo-polysaccharides (EPS). Cell cultivation was optimized in fully controlled stirred tank bioreactor in batch and fed-batch culture to improve the process and to increase the anticancer EPS production. In the first part of this study, significant improvement in EPS production was achieved upon transferring the process from shake flask to 15 L bioreactor. Further development in the process was conducted through optimization of some process parameters in bioreactor batch culture. In fed-batch culture, among different feeding strategies, optimized glucose feeding based on using the in-line data for oxygen and carbon dioxide obtained from out-gas analyzer was the best. The maximal yield of EPS obtained was 2.1 g L-1 in optimized fed-batch culture. The obtained EPS was almost two fold higher than those obtained in batch culture.
  N. Taleb-Hossenkhan and A. Ibrahim
  Phytophthora infestans, the causal agent of potato and tomato late blight disease continues to be a serious threat in almost all potato and tomato growing areas around the world, with dramatic and disastrous economic consequences. In Mauritius, the disease is reported every year and many of the commercial potato varieties (Spunta, Delaware and Mondial) previously found to be moderately resistant or susceptible to the disease, have now become highly susceptible. This study reports the first phenotypic and genotypic characterization of local strains of Phytophthora infestans from the island of Mauritius. Seven isolates of Phytophthora infestans were collected from distinct geographical areas during the blight seasons of 2012 and 2013 and tested for aggressiveness on four potato and three tomato cultivars, metalaxyl sensitivity and subjected to isozyme analysis at the Gpi and Pep loci. Results show that all the isolates exhibited a clear host adaptation to potato, being only very weakly pathogenic on tomato. Most of the isolates (five out of seven) had high or intermediate metalaxyl resistance. Isozyme analysis revealed that at the Gpi locus, two isolates were 86/86, one isolate was 86/100, one isolate was 100/100 and one isolate was 122/122. At the Pep locus, two isolates were 92/92, two isolates were 92/100 and three isolates were 100/100. The combined results of the tests indicate that the seven isolates collected over the island are genetically distinct from each other and do not represent the same strain.
  A. Ibrahim , E.I. Magani and T. Avav
  A 2-years experiment (2005-2006) was conducted in Southern Tunisia to determine the effect of deficit irrigation regimes with saline water on soil salinity, growth, yield and water use efficiency of millet (Pennisetum glaucum (L.) R. Br.). Millet was grown in a commercial farm during summer season on a sandy soil and drip-irrigated with water having an ECi of 7.6 dS m-1 for both experiments, a complete randomized block design with four replicates was used to evaluate four irrigation regimes. Irrigation treatments consisted in water replacements of accumulated crop Evapotranspiration (ETc) at levels of 100% (100 L) 80% (80 L) 60% (60 L) and 40% (40 L), when the readily available water in the control treatment (100 L) is depleted. Findings are globally consistent between the two experiments. Results show that salinity was lowest under emitters and highest midway to the margin of wetted bands. Under emitters it increased gradually between 100 and 40 L from 2.75-6.10 dS m-1 in 2005, from 1.95-4.92 dS m-1 in 2006. Highest ECe values were found to occur at about 20 and 7 cm from emitters, respectively for 100 and 40 L. For both experiments, LAI decreased significantly as the amount of applied water decreased from 100-40% of ETc. Yields were highest under 100 L. From values of 26.70 and 27.65 q ha-1, respectively for 1st and 2nd year, yields decreased almost linearly when applied water was reduced. However, reduction in quality was significantly important for 60 and 40 L. The analysis outcome of the crop sensitivity to salt indicated that threshold are close to the value calculated from published salt tolerance data (3.46 vs. 3.65 dS m-1) but the slope are considerably steeper (17 vs. 6.7%), apparently because of the combined effect of salinity and water stresses. Water Use Efficiency (WUE) was found to vary significantly among treatments, where the highest (7.60 kg/ha/mm) and the lowest (6.4 kg/ha/mm) values were obtained from 60 and 100 L treatments, respectively. Finally, results support the practicality of using the 100% of ETc methodology to optimize irrigation with saline water for millet production and to control soil salinity. Under situations of water shortage, the deficit irrigation strategy (80% of ETc) is recommended as a tool to schedule irrigation of millet crop in arid regions of Tunisia.
  A.U. Akpan-Idiok , A. Ibrahim and I.A. Udo
  Surface composite water samples from seventeen different locations along Okpauku river were analyzed for various water quality parameters following standard methods prescribed by American Public Health Association/American Water Works Association/Water Environment Federation (APHA/AWWA/WEF). The results revealed that the water quality parameters showed significant (p≤0.05) variations among the different locations on the river, except for the ammonia-nitrogen and iron. However, the physicochemical parameters of the river at different locations were below the WHO and FAO limits for drinking and irrigation water uses except for the temperature, turbidity and pH. Mean concentrations of major ions, nutrients and heavy metals in all the locations were generally low when compared to the acceptable standards for drinking water (WHO) except for ammonia-nitrogen and iron in location 2, but fall within the allowable limits for irrigation (FAO). The microbiological parameters examined were far above the recommended guidelines given by WHO and FAO, for drinking and irrigation water uses. Nevertheless, apart from the microbial organisms, turbidity and ammonia-nitrogen, the river water may be regarded as a suitable source of water for drinking, irrigation and other domestic uses in the area. Thus, a dam could be constructed across the river in order to subject the water to some treatment processes, especially elimination of enteric microbes and to reduce the turbidity to the required standard before being used.
  J. W Orchard , E Steet , A Massey , S Dan , B Gardiner and A. Ibrahim

Background: Local anesthetic pain-killing injections are commonly used by some professional football teams to allow continued play for certain injuries; however, the long-term safety of this practice has not been studied.

Hypothesis: The majority of local anesthetic injections administered in professional football are helpful and safe, not leading to long-term sequelae.

Study Design: Case series; Level of evidence, 4.

Methods: A retrospective survey was conducted of 100 players over 10 seasons who had been injected with local anesthetic on 1023 occasions for 307 injuries (81% follow-up; average follow-up, 5 years; minimum, 1 year). A comparison of match performance statistics was made from 3 seasons between players using and not using local anesthetic.

Results: The majority (98%) of players would repeat the procedure if they had their injury again, although 32% felt that there were side effects associated with the procedure (including 22% who thought that the recovery of the primary injury was delayed and 6% who thought that the injury was worsened by playing with local anesthetic). On long-term follow-up, only 6% of players had significant residual pain in the body part injected. The satisfaction rates for acromioclavicular injuries, finger injuries, rib injuries, and iliac contusions were higher than for sternum injuries, wrist injuries, and ankle injuries. Player performance between those players injected and not injected with local anesthetic was not substantially different and mainly reflected a positional bias for the players who used local anesthetic.

Conclusion: The most commonly injected injuries—acromioclavicular joint sprains, finger and rib injuries, and iliac crest contusions—appear to be quite safe (in the context of professional sport) to inject at long-term follow-up. Conversely, ankle, wrist, and sternum injections appear to be less safe. A few injuries may have been substantially worsened by playing after an injection.

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