Browsing by Author "Mwirichia, Romano K."
Now showing items 21-39 of 39
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Effects of biocementation on some properties of cement-based materials incorporating Bacillus Species bacteria – a review
Mutitu, Karanja Daniel; Munyao, Mulwa O.; Wachira, Jackson M.; Mwirichia, Romano K.; Thiong'o, Karanja J.; Marangu, Mwiti J. (Taylor and Francis, 2019-11)There is a growing need in the construction industry to improve transfer and durability aspects of Portland pozzolana cement. Ureolytic bacteria have recently emerged as potential micro-organisms well known for precipitation ... -
In vivo antimalarial and acute toxicity properties of hexane and chloroform extracts from Clausena anisata (Willd.) Benth
Irungu, Beatrice N.; Mbabu, Murungi J.; Kiboi, Daniel M.; Moindi, Enock; Kinyua, J.; Mwirichia, Romano K. (2012)Background: Drugs are an important tool for control of malaria. However, drug resistance is likely to compromise available antimalarial drugs with time. As a result, efforts are being directed towards discovery and development ... -
Influence of Lysinibacillus sphaericus on compressive strength and water sorptivity in microbial cement mortar
Mutitu, Daniel Karanja; Wachira, Jackson M.; Mwirichia, Romano K.; Thiong'o, Joseph Karanja; Munyao, Onesmus Mulwa; Muriithi, Genson (Elsevier, 2019-11)Cement structures are subject to degradation either by aggressive media or development of micro/macro cracks which create external substance ingress pathways. Microbiocementation can be employed as a self-intelligent solution ... -
Influence of Lysinibacillus sphaericus on compressive strength and water sorptivity in microbial cement mortar
Mutitu, Daniel Karanja; Wachira, Jackson M.; Mwirichia, Romano K.; Thiong'o, Joseph Karanja; Munyao, Onesmus Mulwa; Muriithi, Genson (Elsevier, 2019-11)Cement structures are subject to degradation either by aggressive media or development of micro/macro cracks which create external substance ingress pathways. Microbiocementation can be employed as a self-intelligent solution ... -
Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars
Munyao, Onesmus Mulwa; Thiong’o, Joseph K.; Wachira, Jackson M.; Mutitu, Daniel Karanja; Mwirichia, Romano K. (Hindawi, 2020-04)Cement-based materials are subject to degradation during their service life. Most of the structural failures have been associated with corrosion of the rebar due to chloride ingress, alkali aggregate reaction, and/or sulfate ... -
Isolation and characterisation of bacteria from the haloalkaline Lake Elmenteita, Kenya
Mwirichia, Romano K.; Muigai, A.W.; Tindall, B.; Boga, Hamadi I.; Stackebrandt, E. (Springer, 2010-04)Culture-independent studies show that soda lake environments harbour diverse groups of bacteria and archaea. In this study different enrichment and isolation media were used in an attempt to isolate novel groups of bacteria ... -
Isolation and characterization of actinobacteria from Lake Magadi, Kenya
Ronoh, Regina C.; Budambula, Nancy; Mwirichia, Romano K.; Boga, Hamadi I. (Academic Journals, 2013-08-09)Actinobacteria are ubiquitous and have been detected in terrestrial and aquatic ecosystems. Although, various studies have focused on the ecology of this phylum, data on the ecology of actinobacteria endemic to soda lakes ... -
Isolation and characterization of actinobacteria from Lake Magadi, Kenya
Ronoh, Regina C.; Budambula, Nancy; Mwirichia, Romano K.; Boga, Hamadi I. (Academic Journals, 2013-08-09)Actinobacteria are ubiquitous and have been detected in terrestrial and aquatic ecosystems. Although, various studies have focused on the ecology of this phylum, data on the ecology of actinobacteria endemic to soda lakes ... -
Isolation and characterization of actinobacteria from Lake Magadi, Kenya
Budambula, N. L. M.; Ronoh, Regina C.; Mwirichia, Romano K.; Boga, Hamadi I. (2013-05-29)Actinobacteria are ubiquitous and have been detected in terrestrial and aquatic ecosystems. Although, various studies have focused on the ecology of this phylum, data on the ecology of actinobacteria endemic to soda lakes ... -
Isolation and characterization of bacillus species from soil in Ngere tea catchment area of Murang’a county, Kenya
Wafula, Eliud N.; Kinyua, J.; Karuiki, D.; Muigai, A.; Mwirichia, Romano K. (2014-07)Bacteria are a very diverse group of organisms in soil, and major taxonomic groups are represented in most soils. The extent of the diversity of microorganisms in soil is seen to be critical to the maintenance of soil ... -
Isolation and characterization of bacterial isolates from Lake Magadi
Kambura, A.K.; Mwirichia, Romano K.; Ngaira, J.; Boga, Hamadi I. (2012)Microorganisms from soda lakes have attracted attention as a possible source of novel enzymes and metabolites for use in industrial applications. Isolation and characterization of bacteria from Kenyan soda lakes has been ... -
Isolation, Characterization and Identification of Enterobacteriaceae from well water in Juja Town in Kenya
Mwirichia, Romano K.; Budambula, Nancy; Hamadi, I.B. (2009) -
Metabolic traits of an uncultured archaeal lineage -MSBL1- from brine pools of the Red Sea
Mwirichia, Romano K.; Intikhab, Alam; Mamoon, Rashid; Manikandan, Vinu; Wail, Ba-Alawi; Kamau, Anthony A.; Ngugi, David K.; Göker, Markus; Klenk, Hans-Peter; Bajic, Vladimir; Ulrich, Stingl (2016-01)The candidate Division MSBL1 (Mediterranean Sea Brine Lakes 1) comprises a monophyletic group of uncultured archaea found in different hypersaline environments. Previous studies propose methanogenesis as the main metabolism. ... -
Microbial Diversity of Lake Elmenteita, Kenya
Mwirichia, Romano K. (Jomo Kenyatta University of Agriculture and Technology, 2009)The major goal of microbial ecology is to understand microbial diversity in natural habitats their interaction with one another and with their habitat. The soda lakes are highly productive environments and the soda lakes ... -
Mitochondrial DNA variation of Bemisia tabaci (gennadius) (hemiptera: aleyrodidae) infesting cassava in Kenya
Atuncha, H.; Monjero, K.; Ateya, L.; Mbogo, I.; Mwirichia, Romano K.; Amata, R.; Ateka, E.M. (2011)Bemisia tabaci is a widely distributed crop pest affecting the yield of a broad range of agricultural, fiber, vegetableand ornamental crops. It is an extremely polyphagous pest that causes direct damage and can act as a ... -
Morphological characterization of soil bacteria in Ngere tea catchment area of Murang'a County, Kenya
Wafula, Eliud N.; Kinyua, Johnson K.; Kariuki, Daniel; Muigai, Anne; Mwirichia, Romano K.; Kibet, Tom (2015-02)Bacteria are a very diverse group of organisms in soil, and major taxonomic groups are represented in most soils. The extent of the diversity of microorganisms in soil is seen to be critical to the maintenance of soil ... -
Phylogenetic and morphological diversity of culturable cyanobacteria from Lake Magadi in Kenya
Ngetha, Edwin; Akhwale, Julia Khayeli; Mwirichia, Romano K. (2019-10)Lake Magadi is an alkaline saline Lake in Kenya, which lies on the Great Eastern Rift valley. Although the lake is characterized by extremes of salt, pH and temperature, it supports diverse groups of cyanobacteria. In ... -
Potential of indigenous bradyrhizobia versus commercial inoculants to improve cowpea (Vigna unguiculata L. walp.) and green gram (Vigna radiata L. wilczek.) yields in Kenya
Mathu, Samuel; Herrmann, Laetitia; Pypers, Pieter; Matiru, Viviene; Mwirichia, Romano K.; Lesueur, Didier (2012)Limited information is available on reduced cowpea (Vigna unguiculata L. Walp.) and green gram (Vigna radiata L.Wilczek.) yields in Kenya. Declining soil fertility and absence or presence of ineffective indigenous rhizobia ... -
Staff Profile - Prof. Romano Mwirichia Kachiuru
Mwirichia, Romano K. (University of Embu, 2015-07)Jan. 2015 to Date Senior Lecturer, University of Embu July 2012 - Dec. 2014 Postdoctoral Fellow (Microbiology), King Abdullah University of Scicence and Technology, Kingdom of Saudi Arabia Feb. 2011 - June 2012 ...