Chemistry Research Papers/Topics

PHYSICOCHEMICAL CHARACTERISTICS AND AMENABILITY TO BENCH SCALE TREATMENTS OF SOME INDUSTRIAL EFFLUENTS AND SEDIMENTS IN LAGOS METROPOLIS

ABSTRACT Untreated industrial effluents discharged into land and surface water are of great environmental concern. Previous studies on physicochemical characteristics of effluents and sediments from discharged points of various industrial sectors in Lagos metropolis are inadequate in scope, duration, chemical treatment options and estimated pollutant discharge load which are of importance in waste water management. This study was designed to investigate the physicochemical characteristics of...

Interaction of Multiwalled Carbon Nanotube Produces Structural Alteration of DNA

ABSTRACT Multiwalled carbon nanotube (MWCNT) has been found to produce structural changes in Calf Thymus-DNA (CT-DNA). The interaction or binding of the multi-walled carbon nanotubes (MWCNT) was investigated in order to discover if it brings about any significant changes of the DNA double helix using CD spectra of the CT-DNA at two concentration levels of MWCNT representing an increasing MWCNT/DNA molar ratio. In addition, spectrophotometric titrations between MWCNT and CTDNA were carried ou...

SYNTHETIC STUDIES ON STERIODAL ALKALOIDS

ABSTRACT In the first part of this thesis, a brief survey of the chemistry of veratramine viz. its occurrence, isolation and structural diagnosis is given. This part also includes a review of recent work on the stereochemistry and the synthetic work of other workers on the alkaloid. The main section describes three approaches to the synthesis of the C-Nor-D-homo ring system of the veratrura alkaloids. Howell and Taylor’s acétate diester 6(3-acetoxy-1 p:2adi (methoxy carbonyl methyl)-9P~me...

STUDES ON LEVELS OF MERCURY, ZINC AND CADMIUM IN SOME ..' CROPS IN THE MINING COMMUNITIES OF TARKWA, PRESTEA, BANKYIM AND AGONA IN THE SOUTH WESTERN PART OF GHANA

ABSTRACT This research was conducted to detennine the levels of mercury, cadmium and zinc in the leaves of Xanthosoma sagittifoliwn (kotombre), Marlihot esclIlenta (cassava leaves) and the conn of Colecasia esclIlenta (taro conn) growing in the mining communities of Tarkwa, Prestea, Bankyim and Agona Junction. The Random sampling method was used to collect the samples and the wet digestion method was used to digest the samples for AAS analysis. A statistical analysis of the results of the res...

ANTIOXIDANT AND WOUND HEALING PROPERTIES OF SOME SELECTED PLANTS FROM KPANDO TRADITIONAL AREA: ISOLATION OF FLAVONOIDS FROM ANOGEISSUS LEIOCARPUS (DC) GUILL AND PERR (COMBRETACEAE)

ABSTRACT Twenty-six wound healing plants have been identified in the Kpando Traditional Area in Ghana. The methanol extracts of six of these plants showed some level of antimicrobial activity against wound causing infectious microorganisms. Similarly, four of these plants exhibited significant wound healing properties. Free radical scavenging activity by 1, 1-diphenyl-2-picryl hydrazyl radical (DPPH) indicated a concentration dependent activity with no significant difference from Ascorbic aci...

EXTRACTION OF ALKALOIDS FROM THE STEM OF THE PLANT CRYPTOLEPIS SANGUINOLENTA (LINDL.) SCHLTR.

ABSTRACT The roots of Cryplo/epis sangllino/Cllla have been investigated for their chemical compounds since 1931. But so far, not much has been reported on the stem although they are used in traditional medicine in Ghana. OJ'plo/cpis sallgllino/enla (Lind.) Schlechter (family Periplocaceae) is a medicinal plant used in some African countries against infectious and parasitic diseases. Phytochcmical $creening of the extracts from the stem (bark and wood) of Oyplo/epis sangliino/Cllla revealed t...

EXTRACTION, ISOLATION AND CHARACTERIZATION OF SOME LIMONOIDS AND SOME CONSTITUENTS OF THE ROOT BARK OF TURRAEA HETEROPHYLLA - SMITH (MELIACEAE)

ABSTRACT The root bark of the plant Turraea heterophylla belonging to the family Meliaceae was investigated for its chemical constituents. Phytochemical screening of both the methanolic and methylene chloride extracts indicated the presence of tannins, saponnins, terpenes, steroids and about eight different limonoids. Exhaustive extraction, chromatography and spectral analyses led to isolation of three compounds. The spectrometric analyses and the resulting data - including IR, NMR(H-H COSY a...

Investigation into Iodine Deficiency of Selected Populations within Cape Coast Metropolis and Agona West Municipality in the Central Region of Ghana –Analysis of Iodised Edible Salts and Ur

ABSTRACT The iodine status of staff and pupils of Hillcrest Schools, undergraduates  of UCC, 2016/2017 academic year and a household in  Agona  Swedru  were determined  using Titration Method, Sandell-Kolthoff  Method and a  Novel Method. Discriminant analysis results showed that the Novel Method correctly classified  77.4%  of  the  original  cases.  The  novel  also  had  a  percentage recovery  of125%  and  a  Horwitz  Ratio  of  0.12.  Based  on  these, ...

Phytochemical and Antimicrobial Properties of African peach (Sacocefalus latifolius)

Abstract This study includes phytochemical screening, quantification of secondary metabolites, thin-layer chromatography (TLC) and antimicrobial  assay of African peach (Sarcocephalus latifolius). The phytochemical analysis revealed the presence of alkaloid, flavonoid and saponin at various  quantities with saponin more abundant amongst others like tannin, glycoside and phenols that are present. All the extracts were tested for  antimicrobial activity with ethanol extract and water extract...

Synthesizing Of Copper Nano Particle

Abstract Development of improved methods for the synthesis of copper nanoparticles is of high priority for the advancement of material science and technology. Herein, starch-protected zero-valent copper (Cu) nanoparticles have been successfully synthesized by a novel facile route. The method is based on the chemical reduction in aqueous copper salt using ascorbic acid as reducing agent at low temperature (80 °C). X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spe...

Momordica foetida phytochemical screening

CHAPTER ONE 1.0 INTRODUCTION Bioactive plants are commonly used by traditional healers or in folklore medicines for the relief of pain or some alignments. This act of medication has made some plant families popular (Heinrich 2000; Kuete et al., 2006).The acceptance of traditional medicine as an alternative form of health care has assisted scientists in elevating these claims, by studying the chemical composition and biological potential (Bisignano et al., 1996; Hammer et al., 1999). This ...

Phytochemical and Antimicrobial Properties of Lavandula angustifolia

Abstract: This present study deals with the quantitative and qualitative phytochemical  screening, the antimicrobial properties and thin layer chromatography of Lavandula angustifolia leaves extracts. These were achieved using the cold maceration method of  extraction involving hexane, water (aqueous) and ethanol, to ensure that a wide polarity  range of components are extracted. Alkaloid, phenol, flavonoids, tannins, terpenes,  glycosides and steroids were observed present in the leaves ...

Quantum chemical calculations on SiF4 and it's protonated analogues

Abstract: For every heteronuclear molecule, protonation can occur at more than one site  thus giving rise to more than one proton affinity. Experimentally, only one proton affinity  (PA) value is reported for a molecule and the experiment does not specify the site for the  protonation. In the present work, quantum chemical calculations are carried out on SiF4 and  its possible protonated analogues (HF4Si+ and HSiF4 + ) by employing several computational  chemistry methods including the M...

SYNTHESIS AND CHARACTERIZATION OF ECO- FRIENDLY UREA-FORMALDEHYDE COMPOSITES BASED ON NATURAL CELLULOSE FIBER

Cellulose is the most common structural biological organic compound on Earth which is widely  used in paper and textile industries and urea-formaldehyde resin is a thermosetting plastic used  mostly as adhesives for plywood, particleboard and other structured wood products. Natural  fiber composites are realistic alternatives of glass fiber composites. Using urea-formaldehyde,  resorcinol-formaldehyde, phenol-formaldehyde, saturated polyesters as matrixes and natural  fiber as reinforcem...

Properties of urea-formaldehyde-resin-cellulose composites

Cellulose is the most abundant, structural, biological organic compound on Earth which is widely used in paper and textile industries.  In  this  project  work,  the  blend  of  compressive  character  of  Urea-Formaldehyde Resin with addition of Cellulose is tested. Cellulose can be extracted from dried plant by alkaline treatment (mercerization), followed by neutralization with acid; product of which undergoes bleaching to produce pure form of cellulose. Urea Formaldehyde Resin c...


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