Physical Sciences and Mathematics Commons^™

Removal Of Heavy Metals From Aqueous Solutions Using Local Adsorbents, Moza S. Al-Sharyani

Theses

The recent rapid increase in industrialization activities contributed to most of aquatic pollution problems. Among aquatic pollutants, heavy metals, such as zinc, lead, cadmium, and copper have gained relatively more significance in view of their persistence and toxicity. Due to their health and toxicological effects, environmental agencies and authorities have set strict regulations to maintain the limit of heavy metals in wastewater below the maximum acceptable concentration levels.

The technical feasibility of using raw date pits and different activated carbons prepared from date pits by air and acid activation as low cost local adsorbents for the removal of different heavy …

Techno-Economic Evaluation Of Conventional And Membrane-Based Pretreatment Before Reverse Osmosis, Shamma Ahmed Rashid Al-Malek

Theses

In this thesis, a technological and economical comparison was conducted on both conventional and membrane based pre-treatment before reverse osmosis desalination. In order to produce high quality water at the design recovery ratio, reverse osmosis membranes should receive high quality feed water in terms of turbidity, suspended solids, and biological matters. Conventional pre-treatment schemes of media and cartridge filters after coagulation chambers have been used for years. Due to the poor performance and decline in reverse osmosis recovery, membrane based pre-treatment has emerged and has been under research and study in the recent years. Few conventional pre-treatment reverse osmosis plants …

Quantitative And Qualitative Assessment Of Groundwater Resources In Al-Khatim Area, Uae, Ahmed Khaled Othman

Accounting Dissertations

The UAE has achieved remarkable progress in transformation from separated small emirates to a modem union country with a high standard of living. The country is however, considered an extreme arid region. In spite of these harsh conditions, The UAE government has encouraged plantation in towns, villages and country side. This has led to sharp increase in the agricultural sector particularly during the last three decades. As the irrigated land kept increasing, there was a deep concern about the water demand and the impact of agriculture activities on groundwater systems. Al-Khatim area is considered one of the most

important agricultural …

Characterization Of The Mechanisms By Which The Organophosphorus Compound Malathion Induces Apoptosis In L929 Murine Fibroblasts, Laila Masoud Ali Al-Alawi

Theses

While acute organophosphorous compound poisoning due to inhibition of acetylcholinesterase is a well-established clinical entity, the existence of chronic poisoning due to exposure to low levels of organophosphorous compounds (below the threshold required for cholinergic clinical symptoms) is a hotly debated issue. In this study, we have evaluated the effects of noncholinergic doses of malathion (0.01-20 µM) on apoptosis of murine L929 fibroblasts. Employing flow cytometric and caspase activation analyses, we demonstrate that malathion induces apoptosis in L929 cells in a dose- and time-dependent manner. The initiator caspases (caspase-8 and caspase-9) as well as the effector caspase (caspase-3) were activated …

"An Investigation Into The Potential Of Immobilized Nitrifies In Wastewater Treatment", Ahmed S. Embaby

Theses

Removal of ammonia from wastewater is one of the problematic issues in wastewater treatment because nitrifies are very slow growing and can be washed out from activated sludge processes. There is a need to use higher advanced techniques to retain biomass. Among these techniques is cell immobilization in appropriate reactor environments. Cell immobilization technology can be approached by various methods, including cell entrapment or biofilms. However, these immobilization techniques are often accompanied by challenges in terms of biomass activity preservation and recovery following the immobilization treatment, reduction of nutrients mass transfer rates, adequate performance under shock situations and preservation of …

Identification Of Shiga Toxin-Producing Escherichia Coli In The Uae, Khawla Hamad Mohd Al-Areef Al-Dhaheri

Theses

Identification of Shiga Toxin-Producing Escherichia coli in the UAE

By

Khawla Hamad Mohd Al-Areef Al-Dhaheri

Abstract

Various patho-groups of Escherichia coli strains are important causes of diarrheal diseases worldwide. Among these strains Shiga toxin producing isolates are particularly important. They are carried by various animals and upon infection, in humans, they may cause serious bloody diarrhea, and in some cases even life threatening sequels as hemolytic uremic syndrome. However, these infections are often under-diagnosed due to the fact that pathogenic strains do not differ from their nonpathogenic counterparts in characters investigated by standard microbiological techniques. Consequently, they can only be …

Optimal Selection Of The Desalination Intakes And Outlets Considering The Environmental And Hydrodynamic Conditions Prevailing In The Uae Western Coastal Water, Ahmed Ali Basioni

Theses

No abstract provided.

Salmonella Infection Among Farm Animals In Al Ain, United Arab Emirates., Dalal Saeed Saeed Mansour Al Kaabi

Theses

Salmonellosis is considered one of the most economically significant diseases, affecting man and different animals. The disease affects all ages of domesticated and wild living animals. Salmonellosis manifests a variety of clinical signs such as diarrhea, abortion, arthritis and respiratory problems. The natural habitat of Salmonella species is the intestinal tract of most animal species. Carrier animals represent a continuous source of shedding the bacteria in the surrounding environment. Salmonella infection among animals and then to man causing public health hazard.

In this study, a total of 882 samples were collected from different animal species in Al Ain area of …

Environmental Application Of Nanoparticles Copper Oxide, Moza Nasser Ai-Khaili

Theses

The work presented in this thesis involves a series of studies carried out toward the two main goals of this project. The first goal is to prepare high surface area pure copper (II) oxide and composites containing copper (II) oxide. The second goal is to investigate the catalytic reactivity of these materials toward the adsorption and decomposition of the environmentally hazardous chlorinated hydrocarbon compounds (CHC).

The first part of this work involves several studies to prepare ultra [me powder of pure copper oxide. Forced precipitation method has been employed starting with copper (II) chloride or copper (II) nitrate Nona hydrate …

Assessment Of The Effect Of Desalination Brine Waste On Marine Water Quality In Ruwais Area: A Numerical Modeling Application, Samer Jouda Al Nahhal

Theses

This thesis aims to investigate the fate and transport of the effluents discharged from

The desalination plant as well other facilities located in the Ruwais Industrial Complex

(RIC) in the United Arab Emirates. These effluents are discharged in to the Ruwais

Coastal marine waters. The effluents from the desalination plant are characterized by

warm water with high salinity, whereas one other effluent is characterized by high n

Nutrient loads. The characterization of the Ruwais environment and such effluents are

Addressed through comprehensive field surveys of the Ruwais costal water over one

Full year.

In order to investigate the impacts of …

Simulating The Oil Spill In The Arabian Gulf Marine Environment: A Risk Assessment In Association With Uae Coastal Desalination Plants, Abubaker Awad El-Hakeem

Theses

The current study is directed towards the development of oil spill hazard contour maps for the prediction of oil spill travel times and critical wind directions in association with major strategic desalination plants in United Arab Emirates. Five desalination plants in are selected along the UAE coastline to be the potential destination points of oil spill hazards. These plants are AI-Shuwayhat, AI-Mirfa, Umm AINar & Taweelah, Jebel Ali and AI-Layah.

In order to reach the set target, a coastal hydraulics simulation model is employed to adopt the real sea-state dynamic conditions. The hydrodynamic simulated results are tuned and tested against …

Effect Of Anti-Oxidants On Endocrine And Metabolic Parameters Of Diabetic Rats, Maryam Suroor Al Shamsi

Theses

Diabetes mellitus is recognized as one of the leading causes of morbidity and mortality in the world. About 5 to 6% of the world population suffers from this disease and the number of people diagnosed with diabetes is rapidly increasing. Diabetes has been demonstrated to be associated with oxidative stress and hyperglycemia, one of the most important indictors of oxidative stress. Normally the endogenous mechanisms of enzymes and antioxidants are able to destroy the reactive species and create a balance between antioxidant and free radicals. In diabetes, the oxidative stress is increased due to the deficiency in the antioxidant defense. …

Fine Mapping Of Sequences Important For Fiv Rna Packaging And Their Mechanism Of Function, Akela Ahmed Mohamed Ghazawi

Theses

The mechanism by which retroviruses preferentially encapsidate their unspliced genomic RNA among millions of both spliced viral and cellular mRNAs in the cytoplasm represents a function of great specificity. This selection process requires that the genomic RNA contain packaging determinants unique to its own RNA that can interact specifically with the packaging proteins of the viral particles, the Gag polyproteins. Knowing the exact sequences involved in packaging should provide basic insights into the mechanism of preferentially encapsidating the full length genomic RNA.

We have been interested in mapping the packaging determinants of the feline immunodeficiency virus (FIV), a lentivirus that …

Quantitative And Qualitative Assessment Of Groundwater Resources In Al-Khatim Area, Uae, Ahmed Khaled Othman

Theses

The UAE has achieved remarkable progress in transformation from separated small emirates to a modern union country with a high standard of living. The country is however, considered an extreme arid region.

In spite of these harsh conditions, The UAE government has encouraged plantation in towns, villages and country side. This has led to sharp increase in the agricultural sector particularly during the last three decades. As the irrigated land kept increasing, there was a deep concern about the water demand and the impact of agriculture activities on groundwater systems. Al-Khatim area is considered one of the most important agricultural …

Effects Of Food Sources And Culture Conditions On Feeding Behaviour And Growth Rates Of Nile Tilapia Fry (Oreochromis Niloticus), Latifa Juma Rashid Al-Shamsi

Theses

The importance of fish aquaculture in general as an alternative source of animal protein, is raised during this century after the significant reduction of natural marine resources. Such reduction has increased the interest of many countries as well as international agencies in worldwide food security, especially for developing countries. The success of any aquaculture is chiefly judged by its economic development, which always depends on the management of producing acceptable marketing size and weight of fish in short time. In the last few decades, many aquacultures failed in balancing between the financial input and the resultant income. That is due …

Effect Of Some Medicinal Plants In U.A.E. On Glucose Homeostasis In Rats, Fatma Khadem Al-Ghaithi

Theses

Diabetes mellitus is one of the most common endocrine diseases in the world that affects almost 6% of the world population. The treatment of diabetes mellitus takes three main forms. First, diet and exercise. Secondly, insulin therapy, and thirdly, using hypoglycaemic agents (suiphonylureas and biguanides). Many of these agents are not very effective in lowering glucose level in diabetic patients and are either too expensive or have undesirable side effects and contraindications. As a result of this, the search for effective drugs for the treatment of diabetes mellitus continues.

Before the introduction of insulin in 1922, the treatment of diabetes …

Morphological And Physiological Abnormalities In Tissue Culture-Derived Date Palm (Phoenix Dactylifera L.) Plants, Hamad Saif Al-Mazroui

Theses

The UAE attaches great importance to agricultural development with a sound focus on date palms. This special attention is obvious in the ongoing expansion of agricultural resources and investments, the growing number of palm trees, and in the extensive use of modern technologies. Mass cultivation of date palm trees is required to continue according to the country's agricultural plans.

In order to achieve these agricultural expansion of date palm, new techniques of propagation other than traditional techniques (seed and offshoot propagation) are critically required. Tissue culture is a modern and reliable technology being one of the main methods for date …