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Environmental Levels and Human Body Burdens of Per- and Poly-Fluoroalkyl Substances in Africa: A Critical Review
(Elsevier, 2020-06-05)
Per- and polyfluoroalkyl substances (PFASs) are known organic pollutants with adverse health effects on humans and the ecosystem. This paper synthesises literature about the status of the pollutants and their precursors, ...
Magnetocaloric Effect and Sign Reversal of Magnetic Entropy Change Across the Spin Reorientation Temperature in R3Fe5O12 (R = Gd, Dy)
(Elsevier, 2020-04-15)
The cubic structure with space group Ia3‾d for Gd3Fe5O12 and Dy3Fe5O12 are successfully synthesized and the magnetic behaviors are studied in details. The dc magnetization measurements show that an obvious negative ...
Spin Reorientation, Normal and Inverse Magnetocaloric Effects in Heavy Rare-Earth Iron Garnets
(Elsevier, 2020-08-01)
Experiments for heavy rare-earth iron garnets Ho3Fe5O12 and Er3Fe5O12 show a compensation effect characterized by a near zero magnetization at 134 K and 80 K, respectively. The magnetic entropy change calculated according ...
Using organic wastes as feed substrates for black soldier fly larvae
(Wegeningen Academic Publishers, 2021-08-25)
Feeding black soldier fly larvae (BSFL) on locally available organic wastes has the potential of providing an alternative source of protein to fishmeal and soybean used in animal feed formulation. This can also mitigate ...
Use of Semiochemicals for Surveillance and Control of Hematophagous Insects
(Chemoecology, 2020-06-23)
Reliance on broad-spectrum insecticides and chemotherapeutic agents to control hematophagous insect vectors, and their related diseases is threatened by increasing insecticide and drug resistance, respectively. Thus, ...
Occurrence of Fungal Foliar Diseases of Tomato in Different Agro-Ecological Zones of Kirinyaga County, Kenya
(Fundamental and Applied Agriculture, 2022-03-30)
Tomato production is characterized by inconsistent quality and yields due to biotic constraints such as fungal foliar diseases. Information on the occurrence of the diseases in different agro-ecological zones of Kenya is ...
Aspects of The Biology and Population Structure of Oreochromis Niloticus, Coptodon Zillii and Oreochromis Leucostictus Tilapia in Lake Naivasha, Kenya
(2022-03-03)
The Nile tilapia (Oreochromis niloticus), Redbelly tilapia (Coptodon zillii) and Blue spotted tilapia (Oreochromis leucostictus) were introduced into Lake Naivasha in the 1950s to diversify and boost the lake fisheries. ...
Assessment of Land Use and Land Cover Changes in Kenya’s Mt. Elgon Forest Ecosystem
(African Journal of Ecology, 2021-05-08)
Current land-use trends in Kenya's montane forest ecosystems show that land uses are changing fast due to natural and anthropogenic factors and these changes could have devastating effects on the environment. One such ...
On Equality of Complete Positivity and Complete Copositivity of Positive Map
(Journal of Linear and Topological Algebra, 5/30/2022)
In this paper we construct a 2-positive map from M4(C) to M5(C) and state the
conditions under which the map is positive and completely positive (copositivity of positive).
The construction allows us to create a decomposable ...
Assessment of the Current Trophic State and Water Quality of Lake Naivasha, Kenya Using Multivariate Techniques
(John Wiley & Sons, Ltd, 2022-12-01)
Lake Naivasha is a tropical freshwater body in Kenya, providing a source of livelihoods to the surrounding communities. The lake ecosystem, however, has become degraded over time because of increasing pollutant loads ...