National Research Repository

The National Research Fund facilitates research for the advancement of Science, Technology and Innovation. One of our core functions is to compile and maintain a national database of research and innovation projects funded by the Fund and other agencies as per the STI Act of 2013.

 

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Registry of Repositories in Kenya (RoRiK)

NRF is developing a Registry of Research Repositories in Kenya (RoRiK) in an effort to promote access to research data in the country.

Recent Submissions

Publication
An Overview of Heavy Metal Pollution in the Western Indian Ocean (WIO) region of Kenya: A Review
(Blueprint Academic, 2024-06-20) Nyamora Moraa Jane, Njiru James, Nyakeya Kobingi, Getabu Albert and Muthumbi Agnes
This study is a review on heavy metal pollution in the Western Indian Ocean (WIO) region of Kenya. The review examines heavy metal pollution of copper, lead, cadmium, iron and zinc that are toxic to marine life and human health; and identifies gaps for future monitoring and assessment. Each pollutant was addressed in order to determine their status in the environment, sources and their effect on biological systems, marine organisms, and human health. Although the concentration levels of these metals are still low and within the recommended standards of global regulating bodies, there is little information in relation to their effects along the food web, human health and how they affect the population dynamics of fish species. Apart from regular monitoring and assessment further research on their effects in the food web and an assessment of human health is recommended.
Publication
Trends in Water Quality in a Tropical Kenyan River-estuary System: Responses to Anthropogenic Activities
(Asian Journal of Biology, 2024-05-11) Kobingi Nyakeya, James Onchieku, Frank Masese, Zipporah Gichana, Albert Getabu and Jane Nyamora,
Aims: To determine the spatial variation in physico-chemical water quality attributes in estuarine ecosystems of South Coast Kenya to inform its management. Study Design: We employed diagnostic research design where such factors as anthropogenic activities, hydrology, and accessibility were considered in choosing 12 sampling stations. A mixed sampling design (probability and non-probability) was used to sample. Place and Duration of Study: Four discharging rivers into estuarine system with a reference point were identified. 12 sampling points were earmarked and sampled for 12 months. Methodology: Nine selected water quality parameters were collected in triplicates monthly for 12 months. Temperature, dissolved oxygen, pH, conductivity, salinity and TDS were collected in situ using YSI Multiparameter meter (Professional plus) while nutrients were analyzed in the laboratory calorimetrically. Data was tested for normality and homogeneity of variances using Levene's and Shapiro-Wilk tests. Two-way analysis of variance (ANOVA), and Principal Component Analysis (PCA) were done using the 64-bit R Software version 4.3.0 to test for significant differences and correlate the parameters among the sampling sites respectively. Observed differences were considered statistically significant at P < 0.05. Results: The measured environmental variables differed significantly among the sampling stations (P < 0.05). temperature and salinity exhibited moderate to strong effect on water quality, while pH and nutrients (phosphates, nitrates, and ammonia) exhibited mixed effects with both negative and positive loadings on the Principal Components. It is demonstrated that the south coast estuary, Kenya is affected by two gradients: mineralization from the sea and the organic matter gradient at the upstream stations dominated by the fluvial inflows from the respective rivers. Conclusion: The south coast of Kenya estuary is impacted by natural processes and anthropogenic activities. we recommend for continued regular water quality assessment and monitoring to acquire sufficient data to shape policy frameworks towards its sustainable management.
Publication
Potential Application of CamelMilk as a Therapeutic Ingredient in Bath Soaps and Shampoos
(2024) Oginga Elly, Toeri Julius, Marete Eunice, Arimi Joshua
The increasing worldwide market for natural-ingredient-based cosmetic toiletries is fueled by the awareness of the dangers of synthetic cosmetics and benefits of natural-based cosmetics on the skincare and management of skin disorders. Besides naturally formulated cosmetics being biodegradable, they also contain ingredients which are chemically beneficial to human skin. Milk based cosmetics are very promising since milk is rich in essential components such as lactoferrins, vitamins, and lactic acids, which have shown therapeutic properties against disorders such as skin cancer, acne scars, and dandruff. One of the milk that is very promising in the cosmetics industry is the camel milk. Currently, there is limited information in literature regarding the use of camel milk in cosmetics and their benefits. Camel milk stands out from bovine milk following its unique therapeutic properties and chemical composition, making it a potential ingredient for skincare and haircare products such as bath soaps and shampoos. The aim of this paper is to review the available literature on camel milk composition and evaluate the contribution of camel milk constituents to cosmetics
Publication
Effects of optimizing fermentation time and stabilizers using response surface methodology on physicochemical properties of camel milk yoghurt
(Elsevier B.V., 2024-08-07) Philip K. Marete, Alfred M. Mariga, Guyo Huka, Levi Musalia, Eunice Marete, Julius M. Mathara, Joshua M. Arimi
The objective of this study was to produce camel milk yoghurt with desired qualities using optimized processing conditions (fermentation time) and ingredients (stabilizer and calcium chloride). The conditions were obtained through Response Surface Methodology (RSM) by lactic acid fermentation by inoculating the milk with Lactobacillus delbrueckii subsp. Bulgaricus (YF-L903, CHR Hansen, Denmark. The study also determined the effects of fermentation time and ingredients on the quality of yoghurt. Fermentation time ranged from 2 to 22 h while stabilizer (corn starch) and calcium chloride (salt) ranges were 1.65–3.34 and 0.061–1.23 % respectively. The quality was monitored hourly for a fermentation period of 2–22 h by determining pH, total titritable acidity (TTA) and viscosity. Results indicated that viscosity was influenced by fermentation time, stabilizer and calcium chloride. The viscosity was increased from 0.01 to 0.4 and 0.01 to 0.3 by fermentation time, 0.01 to 0.2 and 0.01 to 0.3 by stabilizer and 0.01 to 0.5 and 0.01 to 0.6 Pa s by calcium chloride. Whereas the combined effects of calcium chloride and stabilizer increased the viscosity of yoghurt to 0.94 Pa s. Prolonged fermentation time, led to an increase in TTA and a decrease in pH. The finding from this study indicated that the optimal conditions required to produce camel milk yoghurt with desired qualities are a fermentation time of 10 h using 2.33 and 0.60 % corn starch and calcium chloride respectively. Under these conditions the produced camel milk yoghurt quality properties were a pH of 4.07, 0.32 % TTA and a viscosity of 0.35 Pa s.
Publication
Common Peri Parturient Diseases, Disorders and Levels of Serum Nutritional Elements of One Humped Female Camel (Camelus dromedaries) in Northern Kenya
(Science publishing group, 2025) Florence Thiakunu, James Kirimi, Joshua Arimi
Camel rearing systems in the Arid and Semi Arid lands are undergoing significant changes, particularly around trading centers. More intensive camel production practices are replacing traditional extensive production systems. A cross-sectional study was conducted in Burat Ward, Isiolo County for intensive production systems and Laisamis, Marsabit County (extensive production systems). The aim of the study was to investigate the prevalence of common peri-parturient diseases and assess whether production systems and physiological status influence variations in serum levels of glucose, calcium, and magnesium. Data collection methods included focus group discussions, structured interviews, and blood sample analysis. The data were analyzed using descriptive statistics, mean comparisons, and Analysis of Variance. Results revealed that the prevalence of common diseases were higher in Laisamis (13.32-27%) than in Burat (4.59-12.06%). Likewise, gross mortality was higher in Laisamis (37.39%) than Burat (7.09%). Serum glucose levels were significantly lower in peri-parturient camels (3.91 and 4.45 mmol/L) compared to those in ordinary physiological status (6.09 mmol/L). Calcium levels remained consistent across physiological statuses and production systems (10.62-11.39 mg/dl). Magnesium levels were similar across physiological statuses but varied depending on the production system, they were higher in Burat (2.91-3.08 mg/dl) than Laisamis (2.46-2.71mg/dl). Most of the camels had below, normal and above normal levels of serum glucose, calcium and magnesium respectively. This was an indication that magnesium levels are influenced by dietary availability rather than physiological status. Malnutrition was the leading cause of death around parturition, primarily driven by negative energy balance. Blood glucose levels were found to depend on the physiological status of the camel, while calcium levels are tightly regulated by homeostatic mechanisms. Magnesium levels, however, depend on dietary intake. The study recommends improving camel nutrition during late pregnancy and early lactation to reduce the risk of metabolic and nutritional disorders.