Research Papers/Topics in Chemistry

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 reinforcement, ...

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 Formaldehyd...

Eco-friendly Urea-Formaldehyde Composites Based on Natural Cellulose Fiber

The variation of character of urea formaldehyde resin with addition of cellulose extracted from corn husk was tested. Cellulose was extracted from dried raw corn (Zea mays) husk, the second largest agricultural crop grown around the world, by alkaline treatment (mercerization), followed by neutralization with acid; product of which underwent bleaching to produce pure form of cellulose. Urea-formaldehyde (UF) resin was prepared by heating the formaldehyde in paraffin oil bath and adding...

Sorption of refampicin on variable soil

Sorption and desorption of rifampicin was assessed on three different soil. Sorption mechanism was studied in terms of equilibrium and kinetics at different pH. Linear, Freundlich and Langmuir isotherm models were adopted to study the isotherm. The experimental data were best described by pseudo-second order kinetics (R2 = 1.00). It was observed that rifampicin absorbs better on soil with lowest organic carbon content. Sorption was observed to increase with decrease in aqueous pH and i...

A STUDY OF THE PHYTOCHEMICAL CONSTITUENTS, NUTRITIVE AND ANTI-NUTRITIVE VALUES OF CALABASH FRUIT

The calabash (Cresentia cujete) fruit was studied for its proximate and mineral composition as well as its phytochemical constituents.  The sugar content, energy content, protein, nitrogen, crude fibre, moisture content, sucrose, fructose, galactose and energy content are quite reasonably high (viz: 1.13%, 8.35%, 1.34%,  4.28%,  84.92%,  59.86%,  25.09%, 18.24% and 88.69%). The pH of the fruit falls within the acidic range (4.8) and the mean value recorded for the ele...

Kinetic studies of the biosorption of lead and zinc from solution using tea fibre

Abstract: This paper presents a biobsorption study on Zn and Pb(II) from dilute aqueous solution using tea fiber as the biosorbent. The biosorption study was carried out as a function of contact time, initial metal ion concentration and biosorbent dosage. The residual Zn and Pb(II) in solution were determined using atomic absorption spectrophotometer. The biosorption was also time dependent as maximum biosorption was obtained after 10 and 20 min, for both lead and zinc respectively. Kine...

Medicinal Chemistry Comparative Phytochemical Screening on Three Growth Stages of Pennisetum Pedicellatum Trin

A comparative preliminary study on the extraction and phytochemical profile of methanolic extracts of the leave, stem and root of pennisetum pedicellatum Trin at three growth stages (i.e stage 1, stage 2, stage 3) was carried out. The extracts were analysed to determine the presence of phytochemicals in the plant. The study revealed the presence of alkaloids, flavonoids, saponins and steroids. Tanins were found only in the stems of the plants and steroids were found only in the leaves....

PRODUCTION OF POTASSIUM SALT (K2SO4) FROM AGRICULTURAL WASTE (UNRIPE PLANTAIN PEELS)

ABSTRACT The production of potassium salt K2­SO4 from unripe plantain agricultural waste was carried out. The sample randomly sourced from canteens located in Owerri West, Imo State. From the result of analysis carried out on the peels was found to contain highest level of K 2.55 ± 1.54 mg/g. other mineral component found were Na 159 ± 1.3 mg/g, Ca 101 ± 0.95 mg/g, Mg 75 ± 0.55 mg/g, Fe 5.8 ± 0.06 mg/g, P 36 ± 1.65. The yield of potassium sulphate, the target of this wor...

PROXIMATE AND CHEMICAL CHARACTERIZATION OF AFRICAN ELEMI NUTS

ABSTRACT The proximate compositions of African elemi nut were investigated by analyzing the moisture content, crude fat, ash content, crude fibre, crude protein and total carbohydrates in the nut. The associations of official analytical chemist (AOAC, 2000) methods were used. The values obtained from the proximate analysis were; moisture content (28.79%), ash (3.41%), crude fiber (2.84%), fat (30.42%), protein (8.40%), carbohydrate (26.14%). The GC-MS characterization revealed th...

PRELIMINARY DETERMINATION OF THE ACTIVE COMPONENTS IN BITTER LEAF ROOT (VERNONIA AMYGDALINA) EXTRACTS IN THE TREATMENT OF DIABETES MELLITUS

ABSTRACT This research work is on the preliminary determination of active components in bitter leaf root (vernonia amygdalina) in the treatment of diabetes. Deficiency of hormone (insulin) causes diabetes mellitus, a disease due to too much of sugar being present in the blood. This is because without insulin in the body, the result is that sugar is extracted in the urine. Consequently, fat and proteins are readily converted to carbohydrates and finally, glucose eventually. The body re...

Effect of EDTA on Tomatoes Plants Seedlings Under Nickel Toxicity

CHAPTER ONE1.0 INTRODUCTION 1.1     NICKEL1.1.1  Occurrence         Nickel (Ni) is a metallic element,with atomic number 28; atomic weight 58.69. Is a metal, which belongs to group VIIIB of the periodic table. The most important oxidation state of nickel is +2, although the +3 and +4 oxidation states are also known (Tundermann et al., 2005). Nickel resembles iron, cobalt, and copper in its chemical properties. However, unlike cobalt and iron, ...

RELEASE KINETICS OF CYMBOPOGON CITRATUS ESSENTIAL OIL FROM STARCH BEADS

ABSTRACT The essential oil of Cymbopogon citratus was extracted using a green method (i.e. essential oil still), encapsulated into cassava starch matrix using sodium alginate as a binder. The encapsulated sodium alginate starch beads were characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectrophotometer (FTIR), release kinetics of the oil was monitored by UV-Visible Spectrophotometry from two (2) aqueous media, buffer of pH 4 and pH 9. The re...

THE MECHANOCHEMICAL AND SOLVENT – BASED SYNTHESIS AND CHARACTERIZATION OF 3,4,5-TRIHYDROXYLBENZOIC ACID CU(II) COMPLEXES.

Mechanochemical synthesis of  [Cu(OOCCH3)2(THB)2] and the Mechanochemical synthesis of  [Cu(OOCCH3)2(THB)2] were carried out, and a  brown solid complexes obtained in both experiment was washed in ethanol respectively. The  physical and instrumental characterisation of the complexes carried out revealed that the complexes obtained are the same

Quantitative Analysis of Carotene and Ascorbic acid from Carrot, Cucumber, Eggplant and Tomatoes

ABSTRACTSpectroscopic method was used to determine quantities of carotene and ascorbic acid in carrot, cucumber, eggplant and tomatoes. The result shows that carrot has higher concentration of carotene =0.1430, follow by eggplant = 0.6950 and tomatoes = 0.0368 and cucumber has the least concentration of carotene =0.0139. The result also show carrot has higher concentration of ascorbic acid 0.958×10-4 mol/d3 follow by tomatoes 0.944×10-4 mol/d3 and eggplant 0.943×10-4 mol/d3 cucumber 0.90...

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