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Dr. Atim David Asitok

SNR. Lecturer
Microbiology
atimasitok@unical.edu.ng

Dr. (Mrs.) Atim David Asitok E-mail: atimasitok@unical.edu.ng Designation: Senior Lecturer Area of Specialization: Environmental Microbiology and Biotechnology Research interest: Microbial bioactive metabolism (biosurfactants, biocatalysts, biopolymers and antibiotics): structure-function relationship, engineering for production and applications in health care and ecotoxicity monitoring.

Tiku, D. R., Antai, S. P., Asitok, A. D. and Ekpenyong, M. G. (2016). Hydrocarbon biodegradation, heavy metal tolerance and antibiotic resistance among bacteria isolates from petroleum-polluted and pristine soil samples in Calabar Metropolis. Imperial Journal of Interdisciplinary Research, 2 (11): 1448-1462.


Antai, S. P., Asitok, A. D., Tiku, D. R. and Louis, O. I. (2016). Distribution and frequency of occurrence of bacteria and fungi isolates in Garden Street dumpsite in Calabar Municipality, Cross River State, Nigeria. International Journal of Innovative Science, Engineering and Technology, 3 (11): 185-200.


Ekpenyong, M., Antai, S., Asitok, A.and Ekpo, B. (2017). Response surface modeling and optimization of major medium variables for glycolipopeptideproduction. Biocatalysis and Agricultural Biotechnology, 10: 113-121. http://dx.doi.org/10.1016/j.bcab.2017.02.015


Ekpenyong, M. G.,Antai, S. P., Asitok, A. D.and Ekpo, B. O. (2017).Plackett-Burman design and response surface optimization of medium trace nutrients forglycolipopeptidebiosurfactant production. Iranian Biomedical Journal, 21 (4): 249-260. http://dx.doi/10.18869/acadpub.ibj.21.4.249


Asitok, A. D. and Antai, S. P. (2006). Petroleum hydrocarbon utilization and biosurfactant production by Pseudomonas and Bacillus species. Nigerian Journal of Microbiology, 20(1): 824-831.


Esin, A. A. and Antai, S. P. (2002). Biodegradability of the major components of Bonny light crude oil by Bacillus subtilis. Global Journal of Pure and Applied Science, 8(2): 215-222.


Antai, E. E., Ndia, I. U. and Asitok, A. D. (2006). Decomposition of mangrove litters and the effect on the carbon:nitrogen ratio in a tropical mangrove ecosystem. African Journal of Environmental Pollution and Health, 5(2): 69-75


Antai, E. E., Esin, A. A. and Udo, S. M. (2003). Bacterial carbon production and subsequent losses to heterotrophic microflagellate in a tropical estuarine ecosystem. African Journal of Environmental Pollution and Health, 2 (1 and 2): 43-47.


Antai, E. E. and Asitok, A. D. (2008). Effect of oral administration of oxytetracycline on the faecalmicroflora of cultured tilapia cichlid (Oreochromisniloticus). Journal of Sustainable Tropical Agricultural Research, 28: 50-58.


Ndome, C., Oriakpono, O., Asitok, A. D. and Ekeno, A. (2010). Microbial content of fresh Chrysichthysnigrodigitatus (Catfish) and Oreochromisniloticus (Tilapia) in Calabar beach. African Journal of Applied Zoology and Environmental Biology, 12(1): 82-86.


Antai, E. E. and Asitok, A. D. (2009). Bacterioplankton viability and production in the lower Cross River estuary, South-East Nigeria. International Journal of Natural and Applied Sciences, 4: 21-26.


Antai, E. E., Ewa-Oboho, I. and Asitok, A. D. (2012). Rates of phytoplankton production, biomass and bacterial production in the Gulf of Guinea, South East Nigeria. Journal of Applied Sciences in Environmental Sanitation, 7 (1): 65-74.


Abriba, C., Lennox, J. A., Asikong, B. E., Asitok, A. D., Ikpoh, I. S., Henshaw, E. E. and Eja, M. E. (2013). Isolation of aflatoxin-producing species of Aspergillus from foodstuffs sold in Calabar markets, Cross River State, Nigeria. Journal of Microbiology and Biotechnology Research, 3 (1): 8-13.


Antai, E. E., Asitok, A. D. and Paul, A. (2015). Bacterial growth efficiency, respiration and secondary production in the Cross River Estuary, Nigeria and the Near Coast. International Journal of Science and Research, 4 (10): 1791-1798.


Ekpenyong, M. G.,Asitok, A. D., Odey, A. and Antai, S. P. (2016). Production and activity kinetics of gelatinase by Serratia sp.SLO3. Nigerian Journal ofBiopesticides, 1(1): 70-82.


Ekpenyong, M. G., Antai, S. P. and Asitok, A. D. (2016). A Pseudomonas aeruginosastrainIKW1 produces an unusual polymeric surface-active compound in waste frying oil-minimal medium. International Journal of Sciences, 5 (6): 108-123.http://dx.doi.org/10.18483/ijSci.1064


Asitok, A. D.,Antai, S. P. and Ekpenyong, M. G. (2017). Water soluble fraction of crude oil uncouples protease biosynthesis and activity in hydrocarbonoclastic bacteria; implications for natural attenuation. International Journal of Sciences, 6 (7): 5-21. http://dx.doi/10.18483/ijSci.1344


Nkanang, A. J., Antai, S. P. and Asitok, A. D. (2017). Bonny light crude oil degradative potential of species of Citrobacter. Microbiology Research Journal International, 21(4): 1-10. http://dx.doi/10.9734/MRJI/2017/35828.


Antai, S. P., Asitok, A. D. and Tiku, D. R. (2017). Influence of varying hydrocarbon and heavy metal concentrations on the microbial density of agricultural soil samples polluted with crude oil. Imperial Journal of Interdisciplinary Research, 3 (9): 1089-1096.


Edet, U. O., Antai, S. P., Brooks, A. A. and Asitok, A. D. (2017). Metagenomic assessment of antibiotics resistance genes from four ecosystems in the Niger Delta area of Nigeria. Asian Journal of Biotechnology and Genetic Engineering, 1(1): 1-10. http://dx.doi.org/10.9734/AJBGE/2017/38009


Oko, J. O., Abriba, C., Umar, M., Asitok, A. D., Audu, J. A., Jakheng, S.P.E., Ojeleye, F. S., and Amos, A. K. (2017). Antibiotics susceptibility study of uropathogens isolated from asymptomatic pregnant women attending a tertiary maternity clinic in northern Nigeria. Journal of Complementary and Alternative Medical Research, 2 (3): 1-9. http://dx.doi.org/10.9734/JOCAMR/2017/32159


Iboyo, A. E., Asitok, A. D., Ekpenyong, M. G.and Antai, S. P. (2017). Selection of Enterobacter cloacae strain POPE6 for fermentative production of extracellular lipase on palm kernel oil processing effluent. International Journal of Sciences, 6 (11): 1-22. http://dx.doi.org/10.18483/ijSci.1482


Nkanang, A. J., Antai, S. P., Asitok, A. D.and Ekpenyong, M. G. (2018). Hydrocarbonoclastic potentials of Enterobacteriaceae isolated from the crude oil polluted Iko river estuary and freshwater ecosystem of the Niger Delta Region of Nigeria. GSC Biological and Pharmaceutical Sciences, 2 (1): 038-046


Edet, P. E., Asitok, A. D., Ekpenyong, M. G.and Antai, S. P. (2018). Evaluation of the effects of nutritional and environmental parameters on production ofextracellular caseinolytic protease byStenotrophomonasacidaminiphila strain BPE4. International Journal of Sciences, 7 (2):70-81. http://dx.doi.org/10.18483/ijSci.1548.


Nkanang, A. J., Antai, S. P., Asitok, A. D.and Ekpenyong, M. G.(2018). Assessment of diesel oil toxicity on some hydrocarbonoclastic bacteria isolated from Iko River estuary in the Niger Delta. World Journal of Pharmaceutical and Medical Research, 4 (5): 48-55.


Edet, U. O., Antai, S. P., Asitok, A. D.and Brooks, A. A. (2018). Comparative evaluation of microbial diversity of epipellic and benthic sediments using cultural and metagenomics techniques. Asian Journal of Environment and Ecology, 6 (4): 1-13.http://dx.doi.org/10.9734/AJEE/2018/41431


Edet, U. O., Antai, S. P., Brooks, A. A., Asitok, A. D., Enya, O. and Japhet, F. H. (2018). An overview of cultural, molecular and metagenomic techniques in description of microbial diversity. Journals of Advances in Microbiology, 7 (2): 1-19. http://dx.doi.org/10.9734/JAMB/2017/37951


Edet, U. O., Antai, S. P., Brooks, A. A.and Asitok, A. D. (2018). Microbiological examination and physicochemical analysis of estuary water used as a point of source drinking water.International Journal of Pathogen Research, 1 (1): 1-13. http://dx.doi.org/10.9734/IJPR/2018/41432

No Results for Research Works done

Showing All Conferences Attended

2. Isolation of biosurfactant-producing bacteria from crude oil polluted samples of Qua Iboe estuary. Oral presentation at the 25th Annual conference and Scientific meeting of Nigerian Society for Microbiology;
2nd-6th December, 2001, University of Ado-Ekiti, Ekiti State, Nigeria.
Start: Sunday 2nd December, 2001
End: Thursday 6th December, 2001
Biodegradation of the major components of Bonny light crude oil by Bacillus subtilis. Oral presentation
Oral presentation at the 24th Annual conference and Scientific meeting of Nigerian Society for Microbiology, 10th-14th September, 2000, Igbinedion University, Okada, Benin, Edo State, Nigeria
Start: Sunday 10th September, 2000
End: Thursday 14th September, 2000
4. Response surface modeling and optimization of major medium variables for glycolipopeptide production. Oral presentation at the 39th annual national conference of Nigerian Society for Microbiology;
Oral presentation at the 39th annual national conference of Nigerian Society for Microbiology; 19th -23rd September, 2016, University of Nigeria, Nsukka (UNN), Enugu State, Nigeria
Start: Monday 19th September, 2016
End: Friday 23rd September, 2016
5. Plackett-Burman design and response surface optimization of medium trace nutrients for glycolipopeptide-biosurfactant production. Oral presentation at the 39th annual national conference of Nigerian Society for Microbiology
Oral presentation at the 39th annual national conference of Nigerian Society for Microbiology; 19th -23rd September, 2016, University
Start: Monday 19th September, 2016
End: Friday 23rd September, 2016
7. Water soluble fractions of petroleum products uncouple protease biosynthesis and activity in Vibrio fluvialis OWPB63: implications for natural attenuation.
Oral presentation at the 40th Annual National Conference of Nigerian Society for Microbiology; 9th-12th October, 2017, AbubakarTafawaBalewaUniveristy, Bauchi, Nigeria.
Start: Monday 9th October, 2017
End: Thursday 12th October, 2017
8. Multivariate analyses of microbial population dynamics and enzyme activity fluxes along gradients of cement-dust-polluted soils in Mfamosing, Nigeria
impact on agriculture. Oral presentation at the 5th Annual South-East Zonal Symposium of Nigerian Society for Microbiology, 24th-25th May, 2018; Federal Polytechnic, Nekede, Owerri, Nigeria.
Start: Thursday 24th May, 2018
End: Friday 25th May, 2018
6. Statistical and artificial intelligence modeling and optimization for development of fermentation conditions for commercial biosurfactant production.
Oral presentation at the 40th Annual National Conference of Nigerian Society for Microbiology; 9th-12th October, 2017, AbubakarTafawaBalewaUniveristy, Bauchi, Nigeria.
Start: Monday 9th October, 2017
End: Thursday 12th October, 2017
3. Seasonal microbial tropho-dynamics in the Great Kwa River, South-East of Nigeria. Oral presentation at the 26th Annual Conference and scientific meeting of the Nigerian Society for Microbiology;
15th-19th July, 2002, University of Uyo, AkwaIbom State, Nigeria.
Start: Monday 15th July, 2002
End: Friday 19th July, 2002
No Results for Grants/Awards Received