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Exploring Trees Diversity and Ecological Value of Mountain Forests in the Blue Nile Region of Sudan

Open Journal of Ecology 2024年第3期14卷 245-256页

作者： Dafa-Alla M. Dafa-Alla haytham.h. gibreel Ahmed A. h. Siddig Yousif E. Yagoub hashim A. Abdelkarim Khatir h.T. Saeed Ahmed I. Abuelbashar Faculty of Forestry-Shambat University of Khartoum Khartoum Sudan harvard Forest Harvard University Petersham MA USA Faculty of Forest Science and Wood Technology University of Gezira Wad-Medani Sudan Department of Forestry and Range Sciences Faculty of Natural Resources and Environmental Studies Alsalam University Alfula Sudan Forest Research and Gum Arabic Centre Agricultural Research Corporation Khartoum-Soba Sudan

We carried out this research at Abu-Gaddaf Natural Forest Reserve (ANFR) which is located east of Blue Nile River, in Blue Nile State, Sudan. It aims at exploring tree composition assessing their diversity indices, and ecological importance values. For survey of types and estimation of density of tree species in the forest, we randomly distributed 97 circular sample plots (0.1 hectare (ha)). In each sample plot we identified all trees to the species level, recorded their frequencies and computed species diversity and importance value indices (IVI). A total of 13 tree species, which belong to 12 genera and nine families, were identified in the tree layer of the forest. Mean tree density in ANFR was 116 trees/ha, composed mainly of Boswellia papyrifera (Del.) hochst. (48), followed by Combretum hartmannianu (19) and Lannea fruticosa (18). Fabaceae was the most common family followed by Combretaceae and Malvaceae. B. papyrifera Delile hochst was the most abundant while Acacia seyal was the least abundant species. Species richness (R = 1.71), evenness (E = 0.69), dominance (0.24) indices and Simpson’s Index of Diversity (D' = 0.76) suggest a moderate diversity, moderate numbers of individuals in each species and a moderate community stability. The research provides empirical results on diversity and ecological importance value of species, signifies the urging need to safeguard threatened species and to prioritize them for conservation, as well as the need to promote management of abundant species to provide multiple forest ecosystem services.

关键词： Tree Species Diversity Dry-Land Forest Sudan

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Pattern of Potential Laboratory Markers for COVID-19 in Eastern Sudan

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Open Journal of Epidemiology 2024年第3期14卷 508-516页

作者： Nazik Sir El Khatim Bakhit Suliman Mohammed Omer Abaker gibreel Mervat Sir El Khatim Bakhit Suliman Department of Clinical Chemistry College of Medical Laboratory Science Eastern Sudan University of Medical Science and Technology Port Sudan Sudan Dean of the Secretariat of Academic Affairs Port Sudan Ahlia University Port Sudan Sudan Cardiology Department Cath Lab Fujaira Hospital Fujaira UAE

Background: Coronavirus disease 2019 (COVID-19) is a recent global health crisis. One of the major issues of COVID-19 is its unpredictable manifestations and serious outcomes. Many hematological parameters are thought to change dramatically during the course of the disease. These include white blood cells, red blood cells, and platelets. This study aimed at evaluating certain laboratory results;peripheral blood lymphopenia, relative neutrophilia, high neutrophil-lymphocyte ratio, and elevated C-reactive protein as potential laboratory markers of COVID-19 in Eastern Sudanese patients. Methods: We, retrospectively, aimed at the evaluation of peripheral blood leucocytes count, neutrophil-lymphocyte ratio NLR and C-reactive protein (CRP) levels in confirmed COVID-19 eastern Sudanese patients during the course of the disease. Results: The mean total leucocytes count, % neutrophils count, absolute neutrophils count and C-reactive protein (CRP) were significantly higher (P. value = 0.000) in COVID-19 patients than in the control group while the mean % lymphocytes count and % mixed cells count were found to be significantly lower in COVID-19 patients than in the control group (P. value 0.000). Conclusion: Peripheral blood leucocyte alterations (simultaneous presence of lymphopenia, relative neutrophilia and high neutrophil lymphocyte ratio (NLR) along with elevated CRP levels may be valuable biomarkers associated with COVID-19 in Port Sudan city, Red Sea state, Sudan. These markers might be important in prediction, inspection of disease progression and prognosis.

关键词： COVID-19 SARS 2 WBCs CRP NLR Port Sudan

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hematological Alterations in an Eastern Sudanese Chronic Kidney Disease Patient Population

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Open Journal of Urology 2024年第6期14卷 359-367页

作者： Mohammed Omer Abaker gibreel Sundus Kamal Ibrahim Wijdan Abdel Aziz hassan Manar Yahia Mahjoub Leyla Mohammed Kheir hamid hibatellah Majzoub Abbas Nuha Fouzi Mohammed Secretariat of Academic Affairs Port Sudan Ahlia University Port Sudan Sudan Department of hematology and Immunohematology College of Graduate Studies Port Sudan Ahlia University Port Sudan Sudan

Background: Chronic Kidney Disease (CKD), associated with a slow and progressive loss of kidney function over a period of several years, is an important clinical disaster with an increasing rate of morbidity and mortality especially in the least developed countries. Many hematological parameters are thought to alter dramatically during the course of the disease. These include white blood cells, red blood cells, and platelets. Methods: We tried, retrospectively, to evaluate the peripheral blood hematological alterations in a group of patients undergoing hemodialysis in an eastern Sudan dialysis center to add local medical information. Results: Anemia (Low hemoglobin and hematocrit) was detected in 94% of the patients’ group. Mean Erythrocyte count (3.32vs.4.76 (×109/L)), hemoglobin concentration (9.4vs.13 (g/dl)), hematocrit (28.7vs.38.7 (L/L)) and platelet count (296 vs. 238 (×109/L)) were significantly lower in the patients’ group than in the control group (P-values Conclusion: Five out of eight studied parameters (Red cell count, hemoglobin, hematocrit, mean cell hemoglobin concentration, and platelets count) have shown a significant alteration in CKD patients. As the complete blood count (CBC) test is the most utilized test in clinical laboratory practice, these alterations may be considered as early indicators for CKD. Furthermore, all patients with CKD must be routinely checked for these alterations.

关键词： Chronic Kidney Disease Chronic Renal Failure hematological Alterations CBC Eastern Sudan hemodialysis

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二乙基三胺五乙酸掺杂聚苯胺自组装微/纳米结构

二乙基三胺五乙酸掺杂聚苯胺自组装微/纳米结构

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2013年全国高分子学术论文报告会

作者： Mohammed gibreel 任先艳井新利李瑜西安交通大学能源动力工程学院化学工程系西安交通大学理学院应用化学系

＜正＞在苯胺化学氧化聚合（COP）体系中,聚合产物会借助多种非共价相互作用自组装形成具有一定形貌特征的超分子结构。反应初始条件,诸如苯胺单体和掺杂酸的浓度、比例等都会影响聚合产物的自组装过程以及产物的结构特征。本文以富含... 详细信息

＜正＞在苯胺化学氧化聚合（COP）体系中,聚合产物会借助多种非共价相互作用自组装形成具有一定形貌特征的超分子结构。反应初始条件,诸如苯胺单体和掺杂酸的浓度、比例等都会影响聚合产物的自组装过程以及产物的结构特征。本文以富含羧基的螯合剂二乙基三胺五乙酸（DTPA）作为掺杂酸进行苯胺的COP过程,以期利用DTPA与苯胺单体以及聚合产物之间的氢

关键词：聚苯胺化学氧化聚合二乙基三胺五乙酸微/纳米结构自组装

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Significance of Serum Electrolyte Pattern in an Eastern Sudanese Dengue Fever Patients Population

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Open Journal of Medical Microbiology 2022年第1期12卷 1-10页

作者： Salwa Abd Almoneim Mohammed Ali Mohammed Omer Abaker gibreel Nazik Sir El Khatim Bakhit Suliman Ali Khider Ali Mohammed Bakri Yousif Mohamed Nour Department of Clinical Chemistry Eastern Sudan College of Medical Science and Technology Port Sudan Sudan Department of Clinical Chemistry Faculty of Medical Laboratory Sciences University of Gezira Wad Medani Sudan Department of hematology and immunohematology Port Sudan Ahlia College Port Sudan Sudan Department of Microbiology Eastern Sudan College of Medical Science and Technology Port Sudan Sudan

Background: Dengue virus (DENV) infection is caused by an arboviral strain and is transmitted by the mosquito Aedes Egyties which is found in Sudan especially Red Sea and Kassala states in the east. In the year 2020 there was a significant outbreak in the both states. The disease is known to cause renal and electrolyte disturbances and a thorough understanding of that which will potentially help in the prediction, diagnosis and treatment of the disease. Methods: This study is a prospective observational cross sectional study conducted in the Eastern Sudan College of Medical Science and Technology and Port Sudan Teaching hospital. 200 confirmed Dengue virus infection patients along with 200 healthy appearing adults (as a control) were enrolled for the study. Statistical analysis was carried out after the collection of patients’ demographic, clinical, and investigational data including electrolyte values. Results: The highest incidence of DENV infection was observed in individuals of the middle age group (29%). Although fallen within reference ranges found in the literature, mean serum electrolyte values differed significantly between patients and controls and between different categories of the disease. For our patients, hyponatraemia was seen in 43.5%, hypokalaemia in 37%, hypocalcaemia in 30%, hypophosphataemia in 12% and low magnesium concentrations in 13%. Mean serum sodium concentration differed in the control (138.2 mmol/l) from in the test (132.5 mmol/l) (P. value 0.02). Similarly, mean serum potassium in the control (3.97 mmol/l) differed significantly (P. value 0.01) from test (3.30 mmol/l). Mean calcium and phosphorus (8.80 and 3.50 mg/dl) in the control were also differed from test (8.51 and 3.30), (P. values 0.02 and 0.004, respectively). In contrast, serum magnesium (mg/dl) in the control group (1.96) showed no significant difference from that of test group (1.90) (P. value 0.08). The biochemical parameters studied were neither affected by age nor by gen

关键词： Dengue Virus hemorrhagic Fever Dengue Shock Syndrome Electrolytes Eastern Sudan

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Prediction of Acute Renal Failure in Dengue Fever Patients

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Open Journal of Urology 2022年第2期12卷 99-106页

作者： Salwa Abd Almoneim Mohammed Ali Mohammed Omer Abaker gibreel Nazik Sir El Khatim Bakhit Suliman Ali Khider Ali Mohammed Bakri Yousif Mohamed Nour Department of Clinical Chemistry Eastern Sudan College of Medical Science and Technology Port Sudan Sudan Department of Clinical Chemistry Faculty of Medical Laboratory Sciences University of Gezira Wad Medani Sudan Department of hematology and Immunohematology Port Sudan Ahlia College Port Sudan Sudan Department of Microbiology Eastern Sudan College of Medical Science and Technology Port Sudan Sudan

Background: Dengue virus (DENV) infection is caused by an arboviral strain and is transmitted by the mosquito Aedes aegypti which is found in Sudan especially Red Sea and Kassala states in the east. The disease is known to cause renal disturbances and a thorough understanding of that will potentially help in the prediction, diagnosis and treatment of the disease. Methods: This study is a prospective observational cross sectional study conducted in the Eastern Sudan College of Medical Science and Technology and Port Sudan Teaching hospital. 200 confirmed Dengue virus infected patients along with 200 healthy appearing adults (control) were enrolled for the study. Statistical analysis was carried out after the collection of patients’ demographic, clinical, and investigational data including serum urea and creatinine values. Ethical approval was obtained from the ministry of health, Red Sea state and informed written consent was obtained from each participant. Results: The highest incidence of DENV infection was observed in individuals of the middle age group (29%). Elevated blood urea levels were detected in 10 (5%) patients while elevated creatinine levels were seen in 17 (8.5%) patients. Although fallen within reference ranges found in the literature, mean blood urea and creatinine values differed significantly between patients and controls and between different categories of the disease. Mean blood urea concentration showed a statistically significant difference between the control (22.3 mg/dl) and the test (28.4 mg/dl) (P value Conclusion: We strongly conclude that renal involvement is not uncommon in Dengue fever and that blood urea and creatinine evaluation should be considered in the counseling of DENV infection patients. Patients need to be subjected to necessary laboratory investigations associated with acute kidney injury to decrease the rate of morbidity and mortality associated with the disease.

关键词： Dengue Virus Acute Kidney Injury hemorrhagic Fever Shock Syndrome Eastern Sudan

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基于聚苯胺/碳纳米管复合物的氮纳米碳管的制备和电化学性能

基于聚苯胺/碳纳米管复合物的氮纳米碳管的制备和电化学性能

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中国化学会第29届学术年会

作者： Mohammed gibreel 贾冬梅李龙刚李瑜西安交通大学理学院应用化学系

氮原子掺杂可赋予碳材料良好的电化学活性。聚苯胺(PANI)氮含量较高,热稳定性较好、且拥有方便可调的微/纳米结构,已被广泛用于含氮纳米碳的前驱体。本文通过在磺化碳纳米管(CNT)的分散液中引入苯胺二聚体、并采用极低的单体浓度(0.005... 详细信息

氮原子掺杂可赋予碳材料良好的电化学活性。聚苯胺(PANI)氮含量较高,热稳定性较好、且拥有方便可调的微/纳米结构,已被广泛用于含氮纳米碳的前驱体。本文通过在磺化碳纳米管(CNT)的分散液中引入苯胺二聚体、并采用极低的单体浓度(0.005M),借助苯胺在CNT表面的化学氧化聚合,获得了PANI包覆CNT的一维纳米复合结构(其平均直径约100 nm,图1,a和b),再经600℃下氮气氛中热处理2 h制备了具有高比表面积的含氮纳米碳管。以CNT为基体得到的这种含氮纳米碳管不仅能够同时表现出双电层效应和赝电容效应(图1,c和d),相比于单纯由PANI炭化得到的含氮碳材料还将具有更好的稳定性。恒流充放电测试表明,在1A/g的电流密度下PANI/CNT及其炭化产物的比电容分别可达416.5 F/g和373.1 F/g,因此,它们有望作为一种性能良好的超级电容器电极材料。

关键词：聚苯胺碳纳米管超级电容器含氮纳米碳

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