Digital Commons Network^™

Quantity And Quality Simulation In Al Ain Water Distribution System, Awbath Saleh Salem Al Jaberi

Theses

A hydraulic and chlorine simulation is conducted for three selected areas in Al Ain region. WaterCad 7.0, a water distribution system model, was chosen to conduct the simulation of the hydraulic behavior within the water distribution system. The fate of residual chlorine flowing through these systems over time is tracked by this software. The conducted hydraulic model predicts the performance of Al Yahar, AI Dhaher and Sweihan networks. Skeletonaization approach is employed in setting up the model for each system. In this study, the customer storage tanks (CSTs) are taken into consideration in performing the extended period simulation. Each group …

Modeling And Optimization Of Biological Nutrients Removal In Wastewater Treatment Processes Considering Advanced Kinetic Modeling Techniques, Nawras Nabil Ai Ghazaly

Theses

In the field of wastewater treatment, there is an increasing demand to improve the effluent

quality especially if it is going to be discharged to surface water. Effluent discharged

to surface water should have minimum nutrients level (nitrogen and phosphorus) in order

to avoid eutrophication and the resulting algal blooms which deplete the water from the oxygen

needed by other plant and animal species. Moreover, there is a demand to reduce the chemical

consumption in the treatment processes and to depend as much as we can on the biological

Treatment methods in achieving the required effluent quality in terms of …

Biosorption Of Priority Pollutants Of Petroleum Refinery Wastewater, Deen Adnan Sheikha

Theses

Heavy metals and organic materials pollution in the aquatic system have become a serious threat today. Zinc, phenol and naphthalene are common environmental contaminants. The fate and transport of these chemicals must be sufficiently understood to predict detrimental environmental impacts and to develop technically and economically appropriate remedial action to minimize environmental degradation. In this study, microbial biomass has emerged as an option for developing economic wastewater treatment. Dead algal biomass may passively sequester metals and organic materials by the process of biosorption from dilute solutions, where biomass functions as an ion exchanger by virtue of various reactive groups available …

Assessment Of The Effectiveness Of Available Pollution Control Technologies In Reducing Phenol Level At Enoc Refinery Wastewater Treatment Plant, Waddah Shihab Ghanim Al Hashemi

Theses

Phenols are present in discharge effluents of many heavy industries such as refineries. They are regulated and monitored by environmental authorities. Emirates National Oil Company (ENOC) processes condensate oil and produces wastewater that is treated at the ENOC Processing Company's (EPCL-refinery) wastewater treatment plant (ETP) through the use of physical, chemical and biological treatment processes. This study provides an in-depth description of the unit processes employed to treat the different waste streams generated at the EPCL refinery and identifies the different types of phenols which are formulated in the processes. Characterization of phenol level at EPCL-ETP and assessment of the …

Synthesis Of Some Pyridinone Nucleoside Analogues As Antitumor Agents, Shaikha Saif Saeed Alneyadi

Theses

Abstract

3-Deazapyrimidine nucleosides have been shown to exhibit great potential as pro drug for use in medicine especially as antagonists to cancer tumors and the HIV-virus. Recent research has focused on the design, synthesis and characterization of novel nucleoside analogues.

Fluoropyridinone and their corresponding nucleoside derivatives have been synthesized and characterized to induce the activity against tumors. 4, 6-diaryl-3-cyano-2(1H)-pyridinones (82a-i) and their nucleosides were prepared. A trifluoromethyl group was introduced into the pyridinone ring system to study its effect on different tumor cells. The glycoside analogues (83a-e, 85a-e, 87a-e and 88a-d) have been synthesized …

Development Of Electroanalytical Methods For The Determination Of Sialic Acid As A Biomarker For Cancer, Khawla Ali Rashid Al-Tayyari

Theses

Sialic acid (SA) is a general term for a family composed of 43 derivatives of neuraminic acid. Whereas N-acetylneuraminic acid (NANA) is the most commonly occurring sialic acid in human. There has been a great interest in the determination of SA in humans because variations in SA level was linked to different medical conditions and diseases. In particular, serum SA are elevated in several types of cancers. SA also exists in Erythropoietin (EPO), a hormone, which induces the production of red blood cells and hence used in the treatment of anemia.

Although of the great physiological significance of SA …

Effects Of Medicinal Plants On Lead Induced Toxicity Of Biotransformation And Redox Cycling Enzymes, Yusra Saif Khalfan Al Dhaheri

Theses

All organisms including humans are constantly and unavoidably exposed to foreign chemicals (xenobiotics), which include both manufactured and natural molecules such as pollutants and plant metabolites. One such alarming pollutant is lead as it is constantly produced from automobiles exhaust products and food containers. It has been documented that lead, as the major heavy metal pollutant in the air, has notable effects on nervous systems and efficiency of several enzymes.

There are some natural products such as medicinal plants that might have antagonistic effects against such pollutants. Several medicinal plants are used as traditional remedies for many ailments without knowing …

A Study Of Factors Influencing The Occurrence Of Algae Bloom (Hab) Along The Abu Dhabi Coast, Uae., Buthaina Salem Saeed Al Qubaisi

Theses

During last few years, the frequency of Harmful Algal Bloom (HAB) has increased worldwide. The occurrence of HAB in the Gulf region has only recently been recorded in the United Arab Emirates (UAE). Specifically, these occurrences have not been thoroughly investigated. This phenomena, was found to be associated with the increase in nutrient load, depletion of oxygen and a significant decrease in fish populations that is caused by a bloom of a certain phytoplankton species, results in economic and social problems. Therefore, the Environment Agency-Abu Dhabi (EAD) has decided to conduct a study on different aspects of this phenomenon of …

Date Palm (Phoenix Dactylifera L.) Tissue Culture: Type Of Contamination And Improvement Of Disinfestation Techniques, Mouza Nasser Al-Shamisi

Theses

Date palm (Phoenix dactylifera L.) cultivation in the United Arab Emirates (UAE) is considered one of the most important economic supports for the agricultural sector. Propagation of date palm by offshoots cannot satisfy the increasing demand of date palm trees, and high propagation rate can only be achieved using tissue culture techniques. However, one of the major problems of this technique is the failure of producing aseptic cultures, yielding to the loss of the explants at the initiation phase.

The objectives of this study were to develop a reliable disinfection technique of date palm explants at the initiation …

Effects Of Novel Synthetic Nucleosides As Anti-Tumor Agents On Human Acute Promyelocytic Leukemia Cell Line (Hl-60), Salma Awad Merghani Mahmoud

Theses

Nucleosides and their analogs are considered a clinically proven class of therapeutic agents possessing anticancer and antiviral activity. Several trifluoromethyl-substituted pyrazole N-nucleosides (coded NIA, NIIA and NIIA) and their nucleobases were synthesized and tested for the ability to induce apoptosis in acute human promyelocytic cell line (HL-60). The growth and proliferation of HL-60 was more effectively inhibited by NIA, NIIA and their nucleobases compared to NIIIA and its nucleobase. In addition, DNA fragmentation was detected in a concentration-dependent manner as a result of nucleosides treatment. A caspase-3-dependent apoptosis was observed based on the Western blot analysis of poly-ADP-ribose polymerase (PARP) …

Expression Of Tumor Suppressor Genes During Breast Cancer Progression In The Rat, Wafa Saqer Rashid Abdullah Aldhaheri

Theses

Breast cancer is the most common type of cancer and the leading cause of cancer deaths among women in the United Arab Emirates and all over the world. Although many factors contribute to the high incidence of breast cancer, a considerable number of cases are related to environmental factors. In this study, breast cancer was induced in female rats using a single dose, 80 mg/kg body wt, of the environmental carcinogen 7,12- dimethylbenz[a]anthracene (DMBA). The aim was to characterize some of the early cellular and molecular changes that occur during breast cancer development in the DMBA-treated rat model. Mammary gland …