Dr. Raymond Limen Njinga
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Dr. Raymond Limen Njinga

Senior Lecturer
Federal University Dutse, Nigeria

Highest Degree
Ph.D. in Physics from Ahmadu Bello University, Nigeria

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Area of Interest:

Physics
100%
Nuclear Physics
62%
Nuclear Energy
90%
Radiation Physics
75%
Nuclear Safety
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
0
Abstracts
0

Selected Publications

  1. Mathuthu, M., S.G. Dlamini and R.L. Njinga, 2018. Exposure risks assessment due to gamma emitting radionuclides in soils and consumable waters around princess gold mine dump in roodepoort, South Africa. Mine Water Environ., 37: 98-105.
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  2. Njinga, R.L., H.R. Amwele, K.G. Pendapala, V.M. Tshivhase, M. Lebogang and K.N. Anna, 2017. Toxicological evaluation of chicken-livers ingested around mafikeng metropolitan city, South Africa. J. Anim. Plant Sci.. 34: 5376-5389.
    Direct Link  |  
  3. Njinga, R.L. and V.M. Tshivhase, 2017.. The impact of mine tailings on the witwatersrand and the surrounding water bodies in Gauteng province, South Africa. Mine Water Environ., 36: 638-645.
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  4. Amwele, H.R., M. Lebogang, K.G. Pendapala, K.N. Anna, R.L. Njinga and V.M. Tshivhase, 2017. Investigation of possible human exposure to metal concentration in vegetables. J. Toxicol. Environ. Health Sci., 9: 66-72.
    CrossRef  |  
  5. Njinga, R.L., V.M. Tshivhase, R.A. Onoja and I.P. Aisha, 2016. Evaluation of gross alpha and beta activity concentration in five vital organs of some goats. J. Anim. Plant Sci., 27: 4219-4229.
  6. Njinga, R.L., V.M. Tshivhase, N.A. Kgabi and M. Zivuku, 2016. Hazards index analysis of gamma emitting radionuclides in selected areas around the uranium mine sites at Erongo Region, Namibia. J. Environ. Sci. Manage., 19: 1-7.
    Direct Link  |  
  7. Njinga, R.L., V.M. Tshivhase and M. Mathuthu, 2016. Chemical toxicity of surface-based drinking water sources due to natural uranium pollutant around princess gold mine environs in Roodepoort, South Africa. Exposure Health, 8: 457-464.
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  8. Njinga, R.L., V.M. Tshivhase and F.B. Yusuf, 2016. The natural radioactivity in some tropical fruit juices in Lapai metropolis by gross alpha and gross beta measurements. J. Anim. Plant Sci., 29: 4603-4612.
    Direct Link  |  
  9. Njinga, R.L. and V.M. Tshivhase, 2016. Lifetime cancer risk due to gamma radioactivity in soils from Tudor Shaft mine environs, South Africa. J. Radiat. Res. Applied Sci., 3: 310-315.
    Direct Link  |  
  10. Tshivhase, V.M., R.L. Njinga, M. Mathuthu and T.C. Dlamini, 2015. Transfer rates of 238U and 232Th for E. globules, A mearnsii, H. filipendula and hazardous effect in medicinal usage around tailing storage site. Int. J. Environ. Res. Public Health, 12: 15782-15793.
    CrossRef  |  
  11. Njinga, R.L., U.U. Elele and I.A. Muhammad, 2015. Radiological health hazards analysis in groundwater by gross alpha and gross beta measurements. J. Dis. Global Health, 2: 99-108.
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  12. Njinga, R.L., S.A. Jonah and M.O. Adeleye, 2015. Application of the Cd- lined irradiation channel of NIRR-1 and Implementation of the k0-IAEA program to evaluate elemental contents in clay samples. J. Applied Phys. Sci. Int., 2: 156-164.
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  13. Njinga, R.L., S.A. Jonah and M. Gomina, 2015. Preliminary investigation of naturally occurring radionuclides in some traditional medicinal plants used in Nigeria. J. Radiat. Res. Applied Sci., 8: 208-215.
    CrossRef  |  
  14. Njinga, R.L., M.O. Adeleye, Y.V. Ibrahim and I.J. Ishoryiyi, 2015. Radioactivity analysis of underground drinking water sources in Ibrahim Badamasi Babangida university Lapai, Niger state, Nigeria. J. Dis. Global Health, 2: 116-124.
    Direct Link  |  
  15. Njinga, R.L. and V.M. Tshivhase, 2015. A comparison of LabSOCS and source-based full energy efficiency generation in measurements. Int. J. Adv. Res., 4: 1102-1107.
  16. Njinga, R.L. and S.A. Jonah, 2015. Calibration of the high purity germanium gamma-ray spectrometer in CERT, ABU Zaria, Nigeria. Modern Instrumentation, 4: 11-17.
    CrossRef  |  
  17. Ibrahim, Y.V., M.O. Adeleye, R.L. Njinga, H.C. Odoi and S.A. Jonah, 2015. Prompt neutron lifetime calculations for the NIRR-1 reactor. Adv. Energy Res., 3: 125-131.
    CrossRef  |  
  18. Adeleye, M.O., S.A. Jonah and R.L. Njinga, 2015. Survey of standardization methods of instrumental neutron activation analysis: A review. Nuclear Radiat. Phys., 81: 31780-31786.
  19. Oladipo, M.O.A., L.N. Raymond, U.E. Ugoeze and S. Adamu, 2014. Heavy metal contamination of drinking water sources due to illegal gold mining activities in Zamfara State–Nigeria. J. Chem. Biochem., 2: 31-44.
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  20. Njinga, R.L., U.U. Elele and I.O.B. Ewa, 2014. Elemental concentration of commonly used clay potteries from some selected locations in Niger State of Nigeria using instrumental neutron activation analysis. J. Environ. Sci. Toxicol. Food Technol., 8: 11-21.
    Direct Link  |  
  21. Njinga, R.L., S.A. Jonah and M.O. Adeleye, 2014. Evaluation of some research reactor parameters in modified irradiation site of NIRR-1. Elixir Nuclear Radiat. Phys., 70: 23880-23885.
  22. Ndontchueng, M.M., R.L. Njinga, E.J.M. Nguelem, A. Simo and J.B. Ateba, 2014. 238U, 235U, 137Cs and 133Xe in soils from two campuses in University of Douala-Cameroon. Applied Radiat. Isotopes, 86: 85-89.
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  23. Ndontchueng, M.M., E.J.M. Nguelem, R.L. Njinga, O. Motapon, A. Simo, J.C.S. Guembou and B. Yemele, 2014. Radiological hazards from bauxite deposit sites in Dschang settlement of Cameroon. Br. J. Applied Sci. Technol., 5: 342-352.
  24. Ndontchuen, M.M., E.J.M. Nguelem, A. Simo, R.L. Njinga and G.S.S. Joel, 2014. Gamma emitting radionuclides in soils from selected areas in Douala-bassa zone, Littoral Region of Cameroon. ISRN Spectrosc., Vol. 2014. 10.1155/2014/245125.
    CrossRef  |  
  25. Jonah, S.A., R.L. Njinga and Y.V. Ibrahim, 2014. An investigation of the impact of installation of Cd-lined irradiation channel in NIRR-1 on core physics data for ENAA. World J. Nuclear Sci. Technol., 4: 21-25.
  26. Oladipo, M.O.A., R.L. Njinga, U.U. Elele and I. Sadiq, 2013. Instrumental neutron activation analysis of aerosol particles in Lapai metropolis. Elixir Pollut., 65: 19963-19966.
    Direct Link  |  
  27. Njinga, R.L., M.N. Moyo and S.Y. Abdulmaliq, 2013. Analysis of essential elements for plants growth using instrumental neutron activation analysis. Int. J. Agron., Vol. 2013. 10.1155/2013/156520.
    CrossRef  |  Direct Link  |  
  28. Ndontchueng, M.M., E.J. Nguelem, A. Simo, R.L. Njinga, J.F. Beyala and D. Kryeziu, 2013. Preliminary investigation of naturally occurring radionuclide in some six representative cement types commonly used in Cameroon as building material. Radiat. Protect. Environ., 36: 71-77.
    CrossRef  |  Direct Link  |  
  29. Oladipo, M.O.A., R.L. Njinga, S.S. Achi, P.O. Ogunleye, B. Alfa and A.A. Ibrahim, 2012. Analysis of savannah and rainforest soils of Nigeria using thermal neutron activation analysis technique. Int. J. Sci. Technol., 2: 583-589.
    Direct Link  |  
  30. Oladipo, M.O.A., R.L. Njinga, A. Baba and H.L. Muhammad, 2012. Evaluation of trace elements in some Northern-Nigeria traditional medicinal plants using INAA technique. Applied Radiat. Isotopes, 70: 917-921.
    PubMed  |  
  31. Njinga,R.L., S.A. Jonah and M.O.A. Oladipo, 2012. Use of k0-ENAA in Evaluation of Th, U and K in Archaeological Matrices: Theories and Fundamentals of Epithermal Neutron Activation Analysis in Archaeometry using Research Reactors. LAP Lambert Academic Publishing, Germany, ISBN-13: 978-3-659-20076-2, Pages: 244.
  32. Njinga, R.L., Y.V. Ibrahim, M.O. Adeleye and S.A. Jonah, 2012. Determination of neutron flux parameters after installation of Cd-lined for implementations of ENAA and FNAA with NIRR-1. Int. J. Applied Sci. Technol., 2: 186-196.
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  33. Njinga, R.L., S.A. Jonah, M.O.A. Oladipo, I.O.B. Ewa and B. Alfa, 2012. Use of k0-ENAA technique for Evaluation of Th, U and K in sediments for archaeometry studies. Int. J. Sci. Technol., 1: 391-399.
  34. Njinga, R.L., S.A. Jonah, M.O.A. Oladipo, I.O.B. Ewa and B. Alfa, 2012. Comparator factors for single standardization techniques in elemental analysis of archaeological matrices. Int. J. Sci. Technol., 1: 376-386.
  35. Ibrahim, Y.V., H.C. Odoi, R.L. Njinga, M.O. Adeleye and S.A. Jonah, 2012. Monte Carlo simulation of additional safety control rod for commercial MNSR to enhance safety. Ann. Nuclear Energy, 39: 71-75.
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  36. Funtua, I.I., M.O.A. Oladipo, R.L. Njinga, S.A. Jonah, I. Yusuf and Y.A. Ahmed, 2012. Evaluation for accuracy and applicability of instrumental neutron activation analysis of geological materials on Nigeria nuclear research reactor-1 (NIRR-1). Int. J. Applied Sci. Technol., 2: 286-292.
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  37. Alfa, B., T.T. Mathew, R.L. Njinga and A. Ibrahim, 2012. Fabrication and characterization of titanium dioxide based dye sensitized solar cell using flame of the forest dye. Applied Phys. Res., 4: 48-56.
    CrossRef  |  
  38. Adeleye, M.O., Y.V. Ibrahim, R.L. Njinga, G.I. Balogun and S.A. Jonah, 2012. Determination of some metal contaminants from industrial effluents in North-West Nigeria using k0-NAA standardization method. Adv. Applied Sci. Res., 3: 678-684.
  39. Oladipo, M.O.A., R.L. Njinga, A. Baba and I. Mohammed, 2011. Contaminant evaluation of major drinking water sources (Boreholes water) in Lapai metropolis. Adv. Applied Sci. Res., 2: 123-130.
  40. Njinga, R.L., Y.V. Ibrahim, M.O. Adeleye and S.A. Jonah, 2011. Neutron flux stability measurement of miniature neutron source research reactors using 0.1% Au-Al alloy and pure Cu wires. Adv. Applied Sci. Res., 2: 488-497.
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  41. Njinga, R.L., S.A. Jonah, I.O.B. Ewa, M.O.A. Oladipo and G.A. Agbor, 2011. k0-IAEA determination of full energy peak efficiency for a high purity germanium detector. Indian J. Sci. Res., 2: 25-32.
  42. Njinga, R.L., I.O.B. Ewa, S.A. Jonah, B. Alfa and Y.A.G. Ahmed et al., 2011. Alternative approach for efficiency data generation in neutron activation analysis. Int. J. Applied Sci. Technol., 1: 244-256.
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  43. Njinga, R.L., I.O.B. Ewa and M.O.A. Oladipo, 2011. Influence of aspect ratios in resolutions of high purity germanium detectors in nuclear measurements. Applied Phys. Res., 3: 84-88.
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  44. Njinga, R.L., B. Alfa, O. Sunday and T.A. Muhammad, 2011. Evaluation of trace elements in clay sediments products of Tatiko locality using x-ray fluorescence technique. Adv. Applied Sci. Res., 2: 370-378.
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  45. Agbo, G.A., B. Alfa, E.I. Ugwu and R.L. Njinga, 2011. Temperature variability in Abuja-Nigeria correlated with solar radio flux. Niger. J. Space Res., 10: 28-33.
  46. Njinga, R.L., I.O.B. Ewa and B. Alfa, 2009. Study of sample-detector geometry displacement and associated errors in analytical measurements. Afr. J. Nat. Sci., 12: 55-62.
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  47. Njinga, R.L., B. Alfa and I.O.B. Ewa, 2009. Geometry scaling using HPGE detector (Model 8111-10195) applied in neutron activation analysis (NAA) measurements with nigeria research reactor-1 (NIRR-1). Afr. J. Nat. Sci., 12: 69-75.
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  48. Tyona, M.D., O.J. Tsor and R.L. Njinga, 2007. Application of a balanced adder-subtractor in the solution of simultaneous linear equations. Niger. J. Phys., 19: 115-119.
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