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Biomaterials Commons

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1996

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Articles 1 - 5 of 5

Full-Text Articles in Biomaterials

A Continuous Process For The Conversion Of Vegetable Oils Into Biodiesel, Hossein Noureddini, D Harkey, V Medikonduru Sep 1996

A Continuous Process For The Conversion Of Vegetable Oils Into Biodiesel, Hossein Noureddini, D Harkey, V Medikonduru

Papers in Biomaterials

Over the last few years fatty acid methyl esters have assumed importance as research has intensified on the utilization of vegetable oils and animal fats derivatives from liquid fuels (better known as biodiesel).Traditional batch processing has been an still is the most widely used process for this coversion. New and more efficient processing schemes. for large scale production of biodiesel for fuelfile1 purposes, is a. key for commercialization of biodiesel. In this, study a continuous process for the transesterification of triglycerides to methyl esters was investigated. This process is based a combined high shear and motionless reactor system. The experimental …


Anion Induced Blue To Purple Transition In Bacteriorhodopsin, Mrunalini Pattarkine, Anil K. Singh Jun 1996

Anion Induced Blue To Purple Transition In Bacteriorhodopsin, Mrunalini Pattarkine, Anil K. Singh

Faculty Works

Purple membrane (PM, λ" role="presentation">λmax" role="presentation">max 570 nm) of H. halobium on treatment with sulphuric acid changes its colour to blue (λ" role="presentation">λmax" role="presentation">max 608 nm). The purple chromophore can be regenerated from the blue chromophore by exogeneous addition of anions such as CI−" role="presentation">− and HPO42−" role="presentation">2−4. Chloride ion is found to be more effective than the dibasic phosphate ion in regenerating the purple chromophore. Nevertheless, one thing common to the anion regeneration is that both CI−" role="presentation">− and HPO42−" role="presentation">2−4 show marked pH effect. At pH 1.0 the efficiency of …


Improved Conversion Of Plant Oils And Animal Fats Into Biodiesel And Co-Product , Praveen R. Muniyappa, Scott C. Brammer, Hossein Noureddini Apr 1996

Improved Conversion Of Plant Oils And Animal Fats Into Biodiesel And Co-Product , Praveen R. Muniyappa, Scott C. Brammer, Hossein Noureddini

Papers in Biomaterials

Increased environmental awareness and depletion of resources are driving to develop alternative fuel from renewable resources that are environmentally more acceptable. Esters of fatty acids (bio-diesel, derived from the transesterification vegetable oils, have properties similar to components of peh-oleior~. based diesel fuel Cost has been a major factor slowing the commercializatio of bio-diesel! Glycerol is the coproduct of the esterification process. In this work the feasibility of the glyc-erol of vegetable oil. with crude glycerol derived from the transesterification of the vegetable oils and animal fats was studied. Utilization of the crude co-product of the biodiesel process was investi-gated for …


Pelargonic Acid In Enhanced Oil Recovery, Hossein Noureddini, M L. Rempe Jan 1996

Pelargonic Acid In Enhanced Oil Recovery, Hossein Noureddini, M L. Rempe

Papers in Biomaterials

Oxidation of monounsaturated iatty ac~dss,u ch as erucic and oleic acids, results in the for~nation of dibasic fatty acids, such as brassylic and azelaic acids. Dibasic acids find many inclustrial applications. Prlargon~ca cid is the co-product oi the process. Expanded use oi dibasic acids would require an expansion in the existing and possihiy new uses for pelargoriic acid and its derivatives. In this study, the potential for using pe!argonic acid in enhanced oil recovery is investigated. Experimental results are presented ior the enhanccd oil recover" by waterilooding with the aid oi a surfactan;. In sifu iormation of surfactant at the …


The Role Of Surface Characteristics In The Initial Adhesion Of Human Bone-Derived Cells On Ceramics, H. Zreiqat, O. C. Standard, T. Gengenbach, J. G. Steele, C. R. Howlett Jan 1996

The Role Of Surface Characteristics In The Initial Adhesion Of Human Bone-Derived Cells On Ceramics, H. Zreiqat, O. C. Standard, T. Gengenbach, J. G. Steele, C. R. Howlett

Cells and Materials

The tissue/biomaterial interactions of three biomaterials of potential use in bone implants were studied in vitro. The mechanism of cell adherence to various ceramic substrata has been investigated by measurement of short term (90 minutes) cell attachment and spreading rate. We have determined the effect of two serum glycoproteins, fibronectin and vitronectin, on the adhesion of human bone derived cells (HBD-cells) cultured on three different types of ceramics {alumina (Al2O3), hydroxyapatite (HAP) and yttria-doped tetragonal zirconia polycrystal (Y-TZP)} . The attachment of HBD-cells to alumina and hydroxyapatite was approximately 60% of that to Y-TZP. Furthermore, …