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Articles by H.E. Mohamed
Total Records ( 15 ) for H.E. Mohamed
  H.E. Mohamed
  The present study was designed to establish reference values for blood concentrations of iron (Fe), Total Iron Binding Capacity (TIBC) and transferring saturation % in camels (Camelus dromedarius). A total of 375 camels of different age groups, sexes were used in this trial. The study indicated that sex did not have a discernable effect on Fe, TIBC and saturation %. Age was a significant variable for Fe and TIBC, but saturation did not differed. Reference ranges for Fe serum concentration, TIBC, and transferring saturation were 166?24.8 ?g dL 1, 361?30.5 and 56.3%, respectively.
  Ali, A.M , H.E. Mohamed , J.G., van der Walt , H.C. Rossouw and H. Engelbrecht
  The study was designed to address the hepatic response (urea and glucose production, glycogen synthesis, and oxygen consumption) to physiological changes in Amino Acid (AA) concentrations. To elucidate this objective, Four South African Mutton Merino Wethers weighing 23-33 Kg were used and the caudate lobe of the liver of mean weight 18.70?1.5 g was perfused with modified Krebs-Henseleit medium. Mixtures of amino acids representing Low Nitrogen (LN), High Nitrogen (HN = 3 X LN) and LN or HN plus either extra alanine, lysine, or glutamine, were perfused at a flow rate ranging from 65-100 ml/min. The data indicates an increase in hepatic urea production and a 20-240% decrease in glucose production in response to high amino acid mixture. The inhibition of glucose production was inhibited by 22% for the HN infusion and further 20% by added alanine, lysine or glutamine. However, the addition of amino acid did not affect urea production and the oxygen consumption.
  Ali, A.M. , H.E. Mohamed , J.G. van der Walt , H.C. Rossouw and H. Engelbrecht
  The present investigation was carried out to assess the influence of changing perfusion medium osmolarity and pH with or without additional amino acid on the hepatic uptake of ammonia and production of urea and glutamine. To elucidate this effect, the caudal liver lobes of twenty Merino sheep (24-35 kg) were perfused using a non-reticulating perfusion model for 3-4 h using Krebs-Henseliet buffer solution containing 2.1 mM lactate, 0.3 mM pyruvate, 10 IU heparin m 1 at 37 C and gassed with O2-CO2 (95:5 v/v). An increase of perfusion osmolarity from 300 mosmol L 1 to 330 mosmol L 1 resulted in an increase in hepatic uptake of ammonia from 1200-nmol g 1 min 1 to 1900 nmol g min 1, thus assisting the hepatic clearance of ammonia. Similarly, hepatic glutamine production rosed from 48 to 177 nmol g 1 min 1. As the influent pH rose, a decline in urea and glutamine production was observed. The additions of amino acids favour glutamine hepatic uptake rather than production.
  H.E. Mohamed
  The purpose of the study was to investigate normal baseline levels of retinal and alpha tocopherol in clinically healthy camels (Camelus dromedarius), kept under natural grazing conditions. A total of 275 Arabi camels of both sexes were sampled over a one-year field survey at Butana area, central Sudan. The overall mean concentration of retinal was 479.569.4 ng/L, whereas alpha tocopherol was 2.10.4 mg/L. Sex showed insignificant effect of vitamin levels. However, season exerted a significant effect; the rainy season (July-October) showed the highest level 493.580.3 ng/L and 2.30.5 mg/L for retinal and alpha tocopherol, respectively. The corresponding figures for the dry season (January-May) were 400.370.0 ng/L and 1.40.4 mg/L, respectively. Age influences vitamin levels with adult having higher status.
  H.E. Mohamed
  The study was undertaken to determine the effects of dietary copper (Cu) on copper status and lipid metabolism in camels (Camelus dromedarius). Six primiparous and 11 multiparous camels were used in this investigation. Camels were randomly assigned to one of three treatments: 1) control (no Cu supplementation; 2) 15 mg of Cu/kg-1 of DM from copper sulphate, CuSO4); 3) 45 mg Cu/kg-1 of dry matter (DM). Plasma Cu concentrations were similar across all treatments. Total plasma cholesterol concentrations were higher in she camels supplemented with Cu at the end of the 2-months period. Camels receiving 45 of Cu had higher plasma cholesterol than camels receiving 15 mg. No effect of treatment on DM intake, mean milk production, milk lipid and protein was observed. The study suggests that Cu supplementation changes lipid metabolism in dairy camels.
  H.E. Mohamed and A.C. Beynen
  Plasma vitamin C concentrations were determined in Saanen and Nubian goats kept in Sudan and while they were either pregnant or lactating. The plasma vitamin C concentrations were lower during pregnancy than during either pre-pregnancy or lactation. The concentrations were lower in the Saanen than in the Nubian goats. Vitamin C concentrations in milk from the Saanen goats were lower than in milk from the Nubian goats, but absolute excretion was higher in the former breed. Saanen kids had lower plasma vitamin C concentrations than Nubian kids. It is suggested tentatively that the low vitamin C status of the Saanen goats during pregnancy is associated with less resistance to disease.
  H.E. Mohamed , H.M. Mousa and A.C. Beynen
  Sudanese cattle and sheep were compared as to plasma, liver and urinary ascorbic acid concentrations. Cattle had lower hepatic ascorbic acid concentrations than sheep. Male cattle had lower plasma ascorbic acid levels and female cattle had lower urinary levels than their sheep counterparts. Concentrations of liver ascorbic acid were lower in females and urinary ascorbic acid was higher in females, irrespective of the species. It is concluded that cattle and sheep may differ as to ascorbic acid metabolism and status, but differences in environmental factors could have had an impact also.
  H.E. Mohamed
  Endometritis has been considered as an important factor in infertility. This study was conducted to assess antioxidant status, Reactive Oxygen Species (ROS) and reactive nitrogen species in healthy and camels with endometritis. The Total Antioxidant Status (TAS), lipid peroxidation in terms of Malondialdehyde (MDA) and antioxidant such as ascorbic acid, alpha tocoherol, in addition to copper and zinc compared between health and those with endometritis. A significant increase in MDA as well as a decrease TAS, AA, alpha tocopherol, Cu and Zn was observed in camels with endometritis compared to healthy. Free radical over production may be a contributing factor in reduction of antioxidant status and increase in the degree of lipid peroxidation. It could be suggested, that antioxidant may play a vita role in the management of infertility including endometritis.
  H.E. Mohamed
  Oxidative stress is an imbalance between oxidant and antioxidant in favour of the former. The aim of this investigation was to assess the antioxidant status and degree of oxidative stress in the blood of camels (Camelus dromedarius) in the sub clinical form of mastitis. The research was conducted on 46 camels. The results indicated a reduction in both individual and Total Antioxidant Status (TAS) and increase in lipid peroxidation, manifested by an increase in Malondialdehyde (MDA) in mastitic dairy camels compared with healthy ones. A similar trend of reduction (p< 0.05) was observed in copper and zinc levels in mastitic camels compared with healthy.
  H.E. Mohamed
  The present study was undertaken to investigate the effect of age, sex and breed on plasma lipids and lipoprotein in camels (Camelus dromedarius). Significant variations in cholesterol, triglyceride and total lipids were observed between neonates, yearling and adult groups of camel. Adult have higher cholesterol (1.590.38 mmol L -1), triglyceride (1.020.1 mmol L -1) and total lipid (6.71.21 g L -1). The neonate cholesterol, triglyceride and total lipid were 1.040.032 mmol L -1; 0.710.09 mmol L -1 and 5.24 g L -1, respectively. However, the corresponding levels for yearling were 1.180.21; 0.830.08 mmol L -1 and 5.501.05 g L -1, respectively. Breed-related differences were evident; Arabi camels showed higher lipid status than Anafi. Cholesterol, triglyceride and total lipids were 1.490.21, 1.090.18 mmol L -1 and 6.691.10 g L -1 in Arabi and 0.910.30, 0.810.20 mmol L -1 and 4.421.09 g L -1 in Anafi, respectively. Sex showed insignificant effect on lipid status.
  H.E. Mohamed
  The study was undertaken to investigate the effects of age, season and breed on plasma vitamin D3 concentrations in Sudanese camels (Camelus dromedarius). A total of 1786 camels, of which 1285 were Arabi and 501 were Anafi camels were used in a one-year field survey in Sudan. Plasma vitamin D3 concentrations showed significant seasonal variations, the highest and lowest were detected in February through July and August through July and August through January, respectively. The seasonal reduction of vitamin D3 was significantly greater in neonates and yearling camels. There is an association between plasma vitamin D and season irrespective of age. The correlation coefficients were 0.52, 0.73 and 0.80 for neonate, yearling and adult camels, respectively. Age group did not affect vitamin D3 plasma levels. Owing to the difference in coat colour, Arabi camels have higher vitamin D3 than Anafi irrespective of season.
  E.O. Amasaib , H.E. Mohamed and A.N.M.A. Fadel Elseed
  This study was conducted to compare some productive traits of imported versus locally bred and crossbred dairy cows (50, 56.5 and 62.5%) in 2 different farms in Khartoum, Sudan. The correlations between milk yield and lactation length for the 1st 3 lactations for Butana farm and the university farm were found to be 0.669 and 0.746, respectively. However, the correlation between total and 100 days mil yield for the 1st three lactations were found to be 0.762 and 0.746 for Butana and the university far, respectively. As for the breed effects, the 100 days milk yield were found to be 2156.6599, 1566.67383, 894.7352.01, 732.761711.1 and 888.03331.96 kg for imported Holstein-Friesian, locally born Holstein-Friesian, 50, 56 and 62.5% Friesian blood, respectively.
  E.O. Amasaib , A.M. Abu Nikhaila , A.N.M.A. Fadel Elseed and H.E. Mohamed
  This study was conducted to compare some productive traits (overall milk yield; 100 days milk yield; lactation length) and the effect of season of calving and parity number on imported versus locally bred and cross bred (50, 56.5 and 62.5%) in 2 different farms in Khartoum, Sudan. The results indicated a highly significant effect of breed in terms of 100 days milk yield; however, season of calving and parity showed insignificant effect in both farms examined. The lactation length impact on 100 days milk yield is significant at p< 0.01 between purebred and cross ones.
  Hind A.A. Elagib , H.E. Mohamed and E.A. Elzubeir
  This study was conducted to investigate the effects of temperature (during summer and winter), dietary methionine and energy level on blood constituent. Blood constituent were negatively affected by the high temperature. Haemoglobin, haematocrit, red blood cells, MCV, MCH and MCHC were negatively reduced at high temperature. Total protein, albumin and globulin were significantly (p< 0.05) reduced at high temperature. Blood minerals K+, Na+, Ca++ and P++ were significantly (p< 0.05) reduced at high temperature but urea was significantly (p< 0.05) increased. Blood constituents were not significantly (p>0.05) increased by different levels of methionine. Haemoglobin, haematocrit and red blood cells, were not significantly affected by dietary methionine. MCV, MCH were increased significantly by increasing methionine level, while MCHC was not significantly affected. Plasma total protein and globulin were not significantly affected by lysine. However, albumin was increased with increasing lysine.
  H.E. Mohamed
  Endometritis has been considered as an important factor in infertility. This study was conducted to assess antioxidant status, Reactive Oxygen Species (ROS) and reactive nitrogen species in healthy and camels with endometritis. The Total Antioxidant Status (TAS), lipid peroxidation in terms of Malondialdehyde (MDA) and antioxidant such as ascorbic acid, alpha tocoherol, in addition to copper and zinc compared between health and those with endometritis. A significant increase in MDA as well as a decrease TAS, AA, alpha tocopherol, Cu and Zn was observed in camels with endometritis compared to healthy. Free radical over production may be a contributing factor in reduction of antioxidant status and increase in the degree of lipid peroxidation. It could be suggested that antioxidant may play a vita role in the management of infertility including endometritis.
 
 
 
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