Research Article
Effects of Ultraviolet Radiation (UVR) on Some Stages of Clarias gariespinus (Catfish) Growth
Alexander Ichaver*,
Alexander Aondongu Tyovenda,
Emmanuel Verzua Tikyaa,
Terver Sombo
Issue:
Volume 10, Issue 1, March 2024
Pages:
1-10
Received:
25 October 2023
Accepted:
2 February 2024
Published:
27 February 2024
Abstract: UVR is a stressor that affect ecological and social systems. It has been noted that UVR presents numerous difficulties for aquatic and human worldwide. It's critical to understand how UVR affects Clarias gariespinus in order to promote healthy fish growth. This study determined how UVR affected catfish. 172 catfish samples were divided into four groups: UV-A, UV-B, UV-C, and controls. The control group was not exposed, whereas the other groups were exposed to UV-A, UV-B, and UV-C, respectively. The exposure period was 131 days, from 8:00 am to 5:00 pm daily. The result on color change shows that UV-C causes a change in color from dark to pink at the fingerling stage and UV-A causes a change in color from dark to slightly pink at the jumbo size, while no color change was observed in other samples. The result on growth rate indicates that the UV-B sample grew faster throughout the period of study, with the highest growth rates of 18.4, 16.2, 14.1, and 8.6 cm for the UV-B, UV-C, control, and UV-A samples, respectively. The result on the mortality rate of the samples shows that the control sample recorded the highest death rate (23) at the fingerling stage, followed by the UV-A (22), UV-C (19), and UV-B (12) samples. The result depicts that UV-B is capable of a rapid increase in the weight, growth, and life span of catfish; hence, exposure of catfish to UV-B can be adopted by fish farmers to improve the healthy fish growth of their farm.
Abstract: UVR is a stressor that affect ecological and social systems. It has been noted that UVR presents numerous difficulties for aquatic and human worldwide. It's critical to understand how UVR affects Clarias gariespinus in order to promote healthy fish growth. This study determined how UVR affected catfish. 172 catfish samples were divided into four gr...
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Research Article
Determination and Analysis of Radiation Shielding Properties of Some Selected Building Materials
Elisha Daniel Edmund*,
Joseph Amoako,
Philip Deatanyah,
Machibya Matulanya
Issue:
Volume 10, Issue 1, March 2024
Pages:
11-20
Received:
22 December 2023
Accepted:
18 January 2024
Published:
2 April 2024
Abstract: Background: Radiation shielding primarily is based on the principle of attenuation of beams of X-ray or gamma radiation by absorption or scattering of the radiation that results due to the interaction between penetrating radiation and matter, radiation shielding properties such as attenuation coefficients obtained as a result of interaction between X-rays and gamma rays with target materials helps to study and confirm the appropriate building materials used for radiation shielding purposes. The linear attenuation coefficient required by radiation engineers in the design and analysis of radiation facilities has been determined and analysed for both gamma ray source Cs-137 and X-ray sources for 662 keV and 60- 120 kVp respectively. Methods: The determination of linear attenuation coefficient was evaluated by the formulation of building materials such as lead, granite, aluminium and concrete by calculating and comparing both experimental and theoretical results for 662 keV and 60-120 kVp using collimated Source-Material-Detector geometry method and XCOM software respectively. Conclusion: The results agreed with similar experimental works and the use of XCOM software with a percentage deviation of 0.44% - 11% at the 95 % confidence level. It was concluded that the results will go in a long way in assisting engineers and radiation professionals in the design and protection of radiation facilities.
Abstract: Background: Radiation shielding primarily is based on the principle of attenuation of beams of X-ray or gamma radiation by absorption or scattering of the radiation that results due to the interaction between penetrating radiation and matter, radiation shielding properties such as attenuation coefficients obtained as a result of interaction between...
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