Bio

DR. MICHIRA IMMACULATE NYAMBURA CV

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Publications


Submitted

Katithi", "DM, Michira" "IN, Guto" "PM, Baker" "P, Kamau' "GN, Iwuoha" "E.  Submitted.  SYNTHESIS AND CHARACTERIZATION OF GREEN TEA STABILIZED IRON NANOCATALYSTS FOR BRYMOTHYMOL BLUE (BTB) DEGRADATION. Journal of Nano Research.

In Press

Mbugua, JK, Kemboi A, Michira I, Madadi V, Zaranyika M, Kamau G.  In Press.  Adsorption of Atrazine Pesticide by sediments and soil samples: Apparent thermodynamic properties.

2014

Sila, JM, Kiio I, Mwaura FB, Michira I, Abong'o D, Iwuoha E, Kamau GN.  2014.  Green Syntheis of Silver nanoparticles Using Eucalyptus Corymbia Leave Extract and Antimicrobial Applications. Journal of BioChemPhysics. 22
Katithi, DN, Michira IN, Guto P, Kamau GN, Baker P, Iwuoha E.  2014.  SYNTHESIS AND CHARACTERIZATION OF GREEN TEA STABILIZED IRON NANOPARTICLES AND THEIR SYNERGISTIC EFFECT ON POLYANILINE. International Journal of Applied Science: Basic and Applied Research, . 13(2):63-76.
M.O, O, Immaculate* M, P G, Baker P, G K, I I.  2014.  Polydisperse Low Diameter "Non-Toxic' Silver Nanoparticles Encapsulated by Rooibos Tea Templates. Nanohybrids. 8:57-72.
KATITHI, DAVIDM.  2014.  GREEN SYNTHESIS OF IRON NANOPARTICLES ON CHAMOMILE INBUILT TEMPLATES. EUROEAN INTERNATIONAL JOURNAL OF APPLIED SCIENCE AND TECHNOLOGY. 1(5):77-98.

2012

Mbugua, JK, Michira IN, Kagwanja SM, Madandi VO, Zaranyika MF, Kamau GN.  2012.  Adsorption of 2,4,5,6-tetra chloroisophthalonitrile by Nairobi river sediments: Adsorption characteristics and related thermodynamic data. International Journal of Biochemiphysics. 20:25-37.

2011

Michira, IN, Richard A, Priscilla B, Immanuel I.  2011.  Synthesis, characterization and Application of Sulfonated polyaniline in Construction of a biosensor for Diazinon. International Journal of Polymeric Materials. 60:469-489.: Taylor and Francis AbstractWebsite

A series of sulfonated polyaniline=derivatized polyaniline nanocomposites was chemically synthesized in the presence of anthracene and naphthalene sulfonic acids. UV-vis and FTIR results indicated the emergence of new bands at 420 and 700nm and1100cm-1 in their spectra, respectively, meaning the dopant/polymer intercalations involved electronic interactions between dopant/polymer sub-lattices. The electroactive
composites displayed moderately fast electrode kinetics. A composite-based biosensor for hydrogen peroxide reached a steady state current of 9.2 and 5.3 mA, and when fine-tuned for diazinon detection gave % inhibitions to be 41 and 81% for thepolyaniline and poly-o-methoxyaniline biosensors, respectively.

2007

Akinyeye, R, Michira I, Botha S, Baker P, Iwuoha E.  2007.  Electrocatalytic Sensor Applications of Nanostructured Polypyrolles and Polythiophenes. Recent advances in Electroanalytical chemistry. T.C. 37/661(2), Fort P.O., Trivandrum-695 023, kerala, India:12-137., Keralala, India: Transworld Network
Michira, IN.  2007.  Synthesis, Electrodynamics and Biosensor Applications of Novel Sulphonated Polyaniline Nanocomposites . (Prof Immanuel Iwuoha, Prof Priscilla-Lorraine Baker, Eds.)., CapeTown: University of the Western Cape Abstract

The overall aim of this thesis was to prepare nanostructured more processable heteronuclear sulphonated polyanyline nanocomposites with electroconductive properties suitable for applications in biosensors. The sulphonated self-assembled polyaniline and derivatised polyaniline nanocomposites (SPAHs) were prepared by chemical oxidative polymerisation or electrical decomposition. The SPAHs prepared include those of polyaniline (PANi), poly-o-methoxyaniline (POMA) and poly-2.5 dimethoxyaniline (PDMA). Two types of sulphonic acids of heteronuclear aromatic hydrocarbons were used in the production of sulphonated SPAH composites. These were anthracene sulphonic acid (ASA) and naphthalene sulphonic acids (NSA) wich played both doping and surfactant roles.

MICHIRA, DRIMMACULATENYAMBURA.  2007.  Electrocatalytic Sensor Applications of Nanostructured Polypyrroles and Polythiophenes. Macromolecular Symposia, 2007, 255, 36-49. : Research SignPost, T.C, 37166(2), Fort Post Office, Trivandrum-695023, Kerala, India Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.
MICHIRA, DRIMMACULATENYAMBURA.  2007.  Spectroelectrochemical reactivities of novel polyaniline nanotube pesticide biosensors,. Macromolecular Symposia, 2007, 255, 36-49. : V. Somerset, M. Klink, R. Akinyeye, I. Michira, M. Sekota, A. Al-Ahmed, P. Baker, E. Iwuoha Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.
MICHIRA, DRIMMACULATENYAMBURA.  2007.  Electrochemical Synthesis and Characterization of 1,2-Naphthaquinone-4-Sulfonic acid Doped Polypyrrole. Electroanalysis, 19, No.2-3, 303-309. : Wiley Interscience Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.
MICHIRA, DRIMMACULATENYAMBURA.  2007.  Synthesis, characterisation of novel polyaniline nanomaterials and applications in amperometric biosensors. Macromolecular Symposia, 2007, 255, 57-69.. 255:36-49.: Wiley Interscience AbstractWebsite

Summary: Anthracene sulfonic acid doped polyaniline nanomaterials were prepared through the chemical oxidative polymerisation process. Ammonium peroxydisulfate (APS) was employed as oxidant. Scanning electron microscopy (SEM) results show the resultant polyaniline (PANi) materials exhibited nanofibrillar morphology with diameter sizes less than 300 nm. Using the nanofibrillar PANI, amperometric biosensors for H2O2 and erythromycin were constructed through the drop-coating
technique. Anthracene sulfonic acid (ASA) doped PANi and the test enzymes horseradish peroxidase, (HRP), or cytochrome P450 3A4, (CYP4503A4) were mixed in phosphate buffer solution before drop coating onto the electrode. The resultant biosensors displayed typical Michaelis-Menten behaviour. The apparent Michaelis-
Menten constant obtained was 0.18-0.01 mM and 0.80-0.02 µM L-1 for the peroxide and erythromycin biosensor respectively. The sensitivity for the peroxide sensor was 3.3x10-3A .cm-2 mM-1, and the detection limit was found to be 1.2x10-2 mM respectively. Similarly, the sensitivity for the erythromycin sensor was
in the same order at 1.57x10-3 A . cm-2 mM-1 and detection limit was found to be 7.58x10-2 µM.

MICHIRA, DRIMMACULATENYAMBURA.  2007.  Anthracene sulfonic acid-doped polyanilines: Electrodynamics and Application as amperometric peroxide biosensor. International Journal of Polymeric Materials. : Research signpost, T.C 37166(2), Fort Post Office, Trivandrum, Kerala, India Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.

2006

MICHIRA, DRIMMACULATENYAMBURA.  2006.  Electrochemical Interrogation and Sensor Applications of Nanostructured Polypyrolles. Electroanalysis, 18(24):2441-2450. : Wiley Interscience Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.

2000

Kamau, IN.  2000.  Trace Gas Emissions for Biomass Cookstoves in Kiambu and Bungoma Districts. (A Pilot Study). (Prof Shem Wandiga, Dr Jacob Kithinji, Eds.)., Nairobi: University of Nairobi

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