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DR ANTHONY MELVIN CRASTO Ph.D ( ICT, Mumbai) , INDIA 29Yrs Exp. in the feld of Organic Chemistry,Working for GLENMARK PHARMA at Navi Mumbai, INDIA. Serving chemists around the world. Helping them with websites on Chemistry.Million hits on google, world acclamation from industry, academia, drug authorities for websites, blogs and educational contributio

Monday, 19 January 2015



Doctor of Philosophy (PhD) in Analytical/Environmental Chemistry.

Master of Science (MSc) In Chemistry.

Bachelor of Science (BSc) Chemistry Major



Address: Department of Chemistry
University of Nairobi,
P. O. Box 30197-00100,
Tel: 254-204446138 (office)
254-722-768245 (mobile)
E-Mail lnjenga@uonbi.ac.ke

Water Chemistry, Water Quality Monitoring and Risk Assessment, Water Purification
and Treatment. Defluoridation of water, Solid waste Management and Treatment,
Environmental Chemistry, Development of Analytical Methods for fluoride and other
anions in different samples, Bioavailability of trace elements, coordination chemistry
Occupation Healthy and Safety issues,

1985 – 1990 University of Nairobi, Doctor of Philosophy (PhD) in Analytical/Environmental
1979–1982 University of Nairobi, Master of Science (MSc) in Chemistry.
1976- 1979 University of Nairobi, Bachelor of Science (BSc) Chemistry Major (1st class
1985-1986 University of Uppsala (Sweden), Diploma in Analytical Chemistry

1974-1975 Alliance Girls High School, Kenya Advanced Certificate of Education
1970-1973 Ngandu Girls High School, Kenya Certificate of Secondary Education.

16th November 2012 – to date: Dean, School of Physical Sciences2
rd January 2011 – 15th Nov 2012: Acting Dean, School of Physical Sciences
2006 – To date: Associate professor of Chemistry, Department of Chemistry
1994 – August 2006 Senior lecturer, University of Nairobi
1987 – 1993 Lecturer, University of Nairobi
1983 – 1987 Tutorial Fellow, Department of Chemistry, University of Nairobi
1982 – 1983 Demonstrator, Department of Chemistry, University of Nairobi
1979 Research Chemist, Ministry of Natural Resources (Mines and Geology)
1976 Teaching (Mathematic and Chemistry), Gatanga Girls secondary School.


Professor Lydia Wanjiru Njenga, PhD
Professor Lydia Wanjiru Njenga  Dean School of Physical Sciences (Pictured) was appointed the Director, Board of Postgraduate Studies, University of Nairobi for a term of three years with effect from January 2, 2015.
The appointment was contained in a letter dated January 2, 2015 and signed by the Vice Chancellor, Professor George A. O. Magoha. Prof. Njenga replaces Prof. Eunice W. Mutitu whose second term as director of the Board of Postgraduate Studies expired on January 2, 2015 after serving for six years.
A holder of a Doctor of Philosophy in Analytical/ Environmental Chemistry, Prof. Njenga was tyhe Dean School of Physical Sciences, is an associate professor in the department of Chemistry having risen through academic levels since 1983 when she first joined the department as a Tutorial Fellow. Prof. Njenga brings along with her a wealth of academic and administrative experience, having served as Dean, School of Physical Sciences. She has also served in several college and faculty committees and was the advisor to the Nairobi University Chemical Club, among other responsibilities.
Prof. Njenga has been Dean School of Physical Sciences For Four years,an external examiner in several local and international universities and has supervised two PhD candidates, several Masters and undergraduate students to completion. Her research interest is in Fluoride analysis in water, foods, plants and soils and coordination Chemistry. She has attended 40 local and international conferences and workshops and presented 14 papers and six reports. Prof. Njenga is widely published with 16 articles in Refereed Journals and has authored two Open and distance learning Modules entitled, “Coordination Chemistry”  and  “Transition Elements (d and f block elements)  and Organometallic Chemistry”.
Prof. Njenga is a member of Kenya Chemical Society, Women in Science and Engineers, Women in Chemistry, Kenya DAAD Association and East and Southern Africa Environmental Chemistry. She engages in several community service initiatives.

The Fountain of Knowledge at the University of Nairobi. 


1. C. Muhavini Wawire, , Damien Jouvenot, Frédérique Loiseau, Pablo Baudinb,
Sébastien Liatard, Lydia Njenga, Geoffrey N. Kamau, Mark E. Casida Densityfunctional
study of luminescence in polypyridineruthenium complexes. Journal of
Photochemistry and Photobiology A: Chemistry 276, (2013) 8– 15
2. David M. Maina, Lydia W. Njenga, John M. Onyari, Banjamin N. Kyalo, Trace Elements
Concentration in Some Tradition Diets Consumed in Selected Parts of Eastern Province of
Kenya Journal of environmental protection 3, ( 2012) 617-623
3. Njenga, L. W., Maina, D. M., Kariuki, D. N. and Mwangi, F. K., Aluminium exposure
from Vegetables and Fresh raw vegetable Juices. Journal of Food Agriculture and
Environment (JFAE) 5 (1) (2007) 8 - 11
4. Njenga, L. W. and Kariuki, D. N. “Determination of labile fluoride in Kenyan soils”. East
African Journal of Physical Science 6 (2) (2005) 57-66.
5. Njenga, L. W. Kariuki, D. N. and Ndegwa, S. “Water Labile fluoride from Fresh Raw
Vegetable Juices from Markets in Nairobi, Kenya”. Fluoride 38 (3) (2005) 205 – 208
6. Njenga, L. W. and Kariuki, D. N.: “Analysis of fluoride in locally available beverages:
Comparison of Direct, Oven Diffusion and Hexamethyldisiloxane Diffusion method”.
International Journal of BioChemiPhysics, 13 (2004) 26 – 31
7. R. W. Kahama, D. N. Kariuki and L. W. Njenga: “Effects of interfering ions on
hexamethyldisiloxane microdiffusion method”. Talanta 44 (1997) 1729-1733.15
8. R. W. Kahama, D. N. Kariuki, H. N. Kariuki and L. W. Njenga: “Fluorosis in children and
sources of fluoride around Lake Elementaita”. Fluoride 30 (1997) 19-25.
9. R. W. Kahama, D. N. Kariuki and L. W. Njenga: “Comparison of two microdiffusion
methods used to measure ionizable fluoride in cow milk. Analyst Vol. 120 (1995) 2245-
2247.L. W. Njenga,
10. L. W. Njenga “Determination of labile fluoride in soils: An Intercomparison of Different
Extracting Medias”. International Journal of BioChemiPhysics, 3, (1994) 18 – 22.
11. L. W. Njenga and D. N. Kariuki: “Accumulation of fluoride in plants and vegetables”.
International Journal of BioChemiPhysics, 3, (1994) 23 - 25.
12. L. W. Njenga, “Fluoride content in some Kenyan tea leaves” International Journal of
BioChemiPhysics, 3, (1994) 75 - 76.
13. L. W. Njenga: “Methods for Fluoride analysis in plants, foods and soil using fluoride ion
selective electrode”. Ph D. Thesis (1989), University of Nairobi.
14. L . Gustafsson and L. W. Njenga, “Determination of total fluoride in vegetables and plants
by open-flame ashing and microdiffusion: comparison with furnace ashing and oxygen-flask
combustion”. Analytical Chemical Acta 212 (1988) 133-143
15. D. N. Kariuki, H. M. Thairu, L. W. Njenga: (1984) “Dietary sources of fluoride in Kenya”.
Paper published in the proceedings of the workshop on “Fluorosis Research Strategies.
Published in African Medical and Research Foundation 36 [1984] 32 - 6.
16. L. W. Njenga “Determination of Fluoride in Water and Tea Using Ion Selective Electrode
and Calorimetric Methods”. MSc. Thesis (1982), University of Nairobi:
Njenga L. W., Module II book for open distance learning book, title “Coordination chemistry”
Reviewed by Prof Shem O. Wandiga (Professor of Chemistry) and edited by Mr J. O.
Odumbe (Director CO&DL) [2005]
Njenga L. W., e-learning module II contents for “Coordination Chemistry”. 3rd year BED
(Science) course material. [2007]
Njenga L. W., Module II book for open distance learning book, title “Transition Elements and
Organometallic Chemistry” Reviewed by Prof Shem Wandiga (Professor in
Chemistry) [2009].

Everyone can afford an avocado, and many pick one up and have it cut into quarters, for immediate consumption as they walk on. Nairobi street food is good!


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