Chemistry Research Papers/Topics

Levels Of Selected Heavy Metals And Fluoride In Tea (Camellia Sinensis) Grown, Processed And Marketed In Kenya

ABSTRACT Tea-drinking is a habit that has over time spread globally. The chemical composition of tea is very complex and is currently a subject of broad medical and toxicological scientific studies. Thus, the accurate quantification of the levels of both essential and non-essential elements in tea is very important in assessing it’s standard and quality as they are directly related to health and disease. This study examined the levels of Iron (Fe), Zinc (Zn), Copper (Cu), Lead (Pb), Cadmium...

Calcium Phosphate And Bioglass Reinforced PLA Thin Film Biocomposites For Slow Drug Delivery Applications

Abstract The rise in the number of musculoskeletal disorders (MSDs) due to the increase in aging population and advancement in medical technology has led to an increasing demand for medication to prevent and treat these diseases. The development of new drugs or formulations to allow treatment of these diseases in their very early stages is only increasing. Local direct and multidelivery of medication and key minerals to support bone repair and regeneration at the defect site, from flexible de...

Development and Improvement of Diesel Oil Characteristics for Varied Petrochemical Industries Applications

The presence of aromatics in fuel deters ultra-low sulfur fuel production. Consequently the researcher’s interest has involved the de-aromatization of fuels. Dearomatization would ultimately improve the quality of the fuels in terms of density, cetane number, viscosity etc. In this study, solvent extraction was adopted to de-aromatize a feedstock sample of 20.1 % aromatic and 166 ppm sulfur using acetonitrile. The extraction was performed at low temperatures 25, 35 and 45 °C and ambi...

Novel Ruthenium Indenylidene Catalysts: From Homogeneous To Heterogeneous

The olefin metathesis was discovered incidentally and independently in 1950s by different researchers on their attempt to polymerize olefins by the Ziegler process [1-5]. The earliest discoveries were the basic exchange olefin metathesis of the inter-conversion of propylene, ethylene and butane-2 as well as ROMP of norbornene and cylcopentene. However, the connection between the two types of reactions was not immediately apparent mainly because different catalysts and conditions were generall...

A Comparative Study of Different Methods for Determination of Selenium in Some Sudanese Fruits, Soil and Water

This study aimed to measure concentration of selenium (Se) in five Sudanese fruits: Ziziphus spina christi (Nabaque); Adansonia digitata (Tabaldi);Balanites egyptiacea (Laloub); Grewia tenax (Gudeim) and Tamarindus indica (Aradeb). Se concentration was also measured in soil where the plant grows from different depths (75 cm ,100 cm and 150 cm). Also water sample was taken from nearby (Hafeer) to determine Se concentration. All samples were collected according to Standard Method of Sampli...

A Comparative Study between Processed and Foam Purified Gum Arabic Var. Senegal

Physicochemical properties of Acacia Senegal var Senegal gum purified by foaming and processed gum (ELNsr) samples were studied. The results showed that the moisture content, ash, nitrogen, protein, viscosity, specific optical rotation and pH were (10.74% and 10.86%), (3.84% and 3.55%), (0.25% and 0.27%), (2.35% and 2.30%), (14.5 cm3g-1 and 14.8 cm 3g-1 ), (-33.61° and -30.75°) and (4.9 and 4.5)] respectively. The gum produced by foaming consists of arabinose (33%), rhamnose (13.5...

Computational Chemistry Study on the Corrosion Inhibitor Performance Of 1,3,4-Oxidizole Derivatives Against The Corrosion Of Mild Steel In Chloric Acid

The objective of this research is to use computational chemistry through the study of three heterocyclic compounds of 1,3,4-oxidizole derivatives. Quantum chemical calculations based on density function theory (DFT) method were performed on three nitrogen-bearing heterocyclic compounds used as corrosion inhibitors for the mild steel in acid media to determine the relationship between the molecular structure of inhibitors and inhibition efficiency. The structural parameters, such as ener...

Assessment of High Sensitive C-reactive Protien of Hepatitis B in Sudanese Patients in Khartoum State

Background CRP was the first acute phase protein to be described and is sensitive systemic marker of inflammation and tissue damage especially in liver disease . hepatitis B viruses Is a common health problem throughout the world and one of the major risk factors for liver disease. General objective: To assess High Sensitive C-reactive protien of Hepatitis B in sudanese Patients In Khartoum State. Specific Objective:   To assess CRP levels an study Group   To correlate between C...

Study of the Major Flavonoids from Balanites aegyptiaca, Cissus petiolata and Hegeina abyssinica

In this study, phenolic compounds were extracted from roots of Balanites aegyptiaca, seeds of Hagenia abyssinica and roots of Cisuss petiolata using 95% ethanol. The crude ethanolic extracts of the studied species were subjected to paper chromatography. In this way compound I was isolated from the roots of Balanites aegyptiaca. The structure of this isolate was elucidated by a combination of spectral techniques (UV, IR, NMR and MS) and the following tentative structure was proposed:

Influence of Extraction Methods on Thermal Properties and Antimicrobial Activity of Moringa peregrina Seeds Oil

The aim of the present study was to investigate the effect of extraction methods on the thermal properties and the antimicrobial activity of Moringa peregrina seeds oil. The oil was extracted by cold pressing (CP) and maceration in n hexane (MH). The yields of the oils were 9.12% % and 21.87% respectively. Except the peroxide value, the chemical properties of the oil extracted by the two methods remained fairly unchanged. Additionally, the results have revealed that the oil which was ex...

Isolation Of Diosgenin From Smilax Kraussiana Meisn Ex. Krauss And Synthesis Of Its Derivatives As Anticancer Agents

ABSTRACT Plants remain a major source of novel drugs for the treatment of various diseases like cancer. The search for safe anticancer drugs from plants has led to the discovery of camptothecin and taxol. Smilax kraussiana is used in herbal medicine to treat tumors, veneral and skin diseases. Many plants including S. kraussiana are still underexploited despite their ethnomedicinal properties. This study was designed to isolate and characterise the constituents of S. kraussiana, synthesise ac...

Investigation On Effectiveness Of Natural (Cactus Powder) And Synthetic(Grafted Potato Starch) Materials As Adsorbents For Hardwater Treatment

ABSTRACT  This study was conducted to investigate the effectiveness of natural and synthetic materials as adsorbents for hard water treatment by using EDTA titrimetric method. Natural adsorbent prepared from cactus and synthetic adsorbent prepared by grafting potato starch and the study conducted on water samples collected from Nzuguni, Ng’ohong’hona, Kisasa and Swaswa in Dodoma municipality. The results revealed that the concentration of hardness decreased as the dose of (Cactus Materia...

The Use Of Extracts From Acacia And Mangrove For The Preservation Of Animal Tissues

ABSTRACT The oldest system of tanning relies on the chemical action of vegetable materials containing tannin and tannic acid on the protein constituents of skin or hides.

Extraction And Characterization Of Insect Repelling Essential Oil From Plants.A Case Study Chamomile, Garlic And Custard

Abstract Plant-based repellents have been used for generations in traditional practices as a personal protection measures against host seeking insects like mosquitoes. Knowledge on traditional repellent plants obtained through ethnobotanical studies, is a valuable resource for the development of natural and environmental safe products. Recently, commercial repellents containing plant based ingredients have gained increasing popularity among customers. These are commonly perceived as ‘safe�...

Evaluation Ofselected Management Practices Contributing To Primary Soil Greenhouse Gas Fluxes In Smallholder Sugarcane Farming In Lower Nyando, Westernkenya

ABSTRACT Human activities (including agriculture) contribute to enhance release of primary greenhouse gases (GHGs) (CH4, CO2, N2O) into the atmosphere leading to global warming. Sugarcane is an important economic crop in Kenya being third highest contributor to gross domestic product (GDP) after tea and coffee. About 90% of Kenya‘s production is contributed by smallholders. To improve/maximize sugarcane yields, farmers convert natural vegetation to sugarcane farms; apply nitrogen fertilizer...


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