School of Biological and Physical Science: Recent submissions
Now showing items 501-520 of 954
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Effects of water deficit on days to maturity and yield of three NERICA rainfed rice varieties
(2010-05)Water deficit is a major problem in rice grown under rainfed conditions. It affects plant growth and development and ultimately leads to a considerable yield reduction or crop failure. Although the rice crop is susceptible ... -
Physiological and biochemical responses of five nerica rice varieties (Oryza sativa L.) to water deficit at vegetative and reproductive stage
(2012)Food shortage is a major problem in sub Saharan Africa as population increases. Over 89% of Kenyans are food poor and are malnourished especially in rural areas. NERICA (New Rice for Africa) are high yielding rainfed rice ... -
Allelopathic potential of mexican sunflower [tithonia diversifolia (hemsl) a. Gray] on germination and growth of cowpea seedlings (vigna sinensis l.)
(PSCI Publications, 2015)Allelopathy is a common among plants. Allelopathic substances affect seed germination, plant growth and development or even affect chlorophyll synthesis by the plant leaves. Tithonia diversifolia contains allelochemicals that ... -
Evaluation of different improved upland rice varieties for low soil nitrogen adaptability
(IJPSS, 2015)Scarcity of nitrogen fertilizer is a major constraint to rice production particularly in developing countries. Low soil fertility prevalent in farmer’s fields has led to low rice yields and the ever escalating fertilizer ... -
Chlorophyll fluorescence parameters and photosynthetic pigments of four Glycine max varieties under Aluminium chloride stress
(PSCI Publications, 2015)Soil acidity limits agricultural production globally. Different kinds of stresses, mainly Al stress, generated from acid soils affect plant growth and result in food shortage and production. General effects of Al toxicity ... -
Influence of nitrogen supply on photosynthesis, chlorophyll content and yield of improved rice varieties under upland conditions in Western Kenya
(sciencedomain., 2016-07-09)Rice (Oryza sativa) is a principal staple food crop in Kenya. However, its production is still low due to inherently low and declining soil fertility. This has resulted into food and nutritional insecurity and low living ... -
Responses of slenderleaf rattlebox (Crotalaria ochroleuca) to water deficit
(2017)Water deficit affects plant growth and development thus affecting crop productivity. It is the major a biotic stress experienced in the vast semi arid and arid regions of Kenya and the world as a whole. Water deficit ... -
Phenotypic and genotypic analysis of clinical isolates Salmonella serovar Typhimurium in western Kenya.
(University of Nairobi., 2009)Salmonella spp. are recognized as some of the most common causes of enteritis worldwide. This study aimed to identify clinically isolated S. Typhimurium in western Kenya and to assess antimicrobial resistance profiles and ... -
Isolation of Salmonella and Shigella from fish harvested from the Winam Gulf of Lake Victoria, Kenya.
(University of Nairobi., 2009)Human infections caused by pathogens transmitted from fish are quite common. The aim of this study was to isolate enteric pathogenic bacteria from fish that might be transmitted to humans after the handling or consumption ... -
Epidemiology of waterborne diarrhoeal diseases among children aged 6-36 months old in Busia-Western Kenya
(World Academy of Science, Engineering and Technology, 2010-01-29)—The purpose of the present study was to evaluate the epidemiology of waterborne diarrhoeal among children aged 6-36 months old in Busia town, western Kenya. The study was carried out between Feb. 2008 and Feb. 2010. ... -
Integron-plasmid mediated antibiotic resistance and virulence factors in clinical Salmonella enterica serovars in rural Western Kenya
(Academic Journals, 2010-07-31)Integron-mediated antibiotic resistance is common among diverse Salmonellaserovars. Phenotypic antibiotic resistance was correlated with the presence of intergron–mediated genes in 65 Salmonella typhimurium isolates using ... -
Potential application of plant essential oils at sub-lethal concentrations under extrinsic conditions that enhance their antimicrobial effectiveness against pathogenic bacteria
(Academic Journals, 2010-08-18)The aim of the present study was to assess the effect of extrinsic factors on the antimicrobial effectiveness of essential oils (EOs) against medically important gram positive and gram negative bacteria. Clove, oregano, ... -
Tetracycline efflux pump in different Salmonella enterica isolated from diarrhea patients in two rural health centers in Western Kenya
(Infectious Diseases and Tropical Medicine Research Center, 2011)Tetracyclines (TCs) are a type of broad-spectrum bacteriostatic antibiotics used for treatment of a wide variety of infections. These antibiotics eventually reach terrestrial and aquatic environments via application of ... -
Prevalence and Antimicrobial Susceptibility Patterns of Enteric Bacteria Isolated from Water and Fish in Lake Victoria Basin of Western
(citeseerx, 2011-03-22)Abstract—A cross sectional study design and standard microbiological procedures were used to determine the prevalence and antimicrobial susceptibility patterns of Escherichia coli, Salmonella enterica serovar typhimurium ... -
Antimicrobial susceptibility patterns of Enterobacteriaceae isolated from domesticated animals and the environment in Lake Victoria, Kenya
(Elsevier, 2013-01-01)Faecal coliform levels in Lake Victoria waters progressively reduced away (0–150 m) from the lake shores. Enterobacter, Escherichia coli, Klebseilla, Proteus and Citrobacter were recovered at high frequencies from water ... -
Microbial assessment of selected earthen fish ponds in western Kenya
(Elsevier, 2013-01-01)Water-borne infections are among the most recent emerging and re-emerging infectious diseases throughout the world. WHO estimates that 80% of all illnesses in the world are caused by water-borne disease pathogens that ... -
Effect of Diplostomum species on length-weight relationship of farmed nile tilapia in Kibos area, Kisumu City, Kenya
(HATASO Enterprises, LLC, 2013-01-01)Diplostomum species metacercariae are parasitic trematodes that pose significant economic threat to fish farming worldwide. Nile tilapia ranks the most commercialized fish in Kenya besides being a cheap source of highly ... -
Using phenotypic based approaches to compare Escherichia coli isolates from human, livestock, fish and environmental sources within the Lake Victoria basin of Kenya
(Academic Journals, 2013-10-18)The study compares Escherichia coli recovered from human, fish products, domesticated animals and the environment within the Lake Victoria basin on the basis of their antimicrobial susceptibility profiles. A total of 134 ... -
Genetic relatedness of Diplostomum species (Digenea: Diplostomidae) infesting nile tilapia (Oreochromis niloticus L.) in western Kenya
(Scientific Research Publishing, 2013-12-20)Diplostomum species metacercariae are trematode parasites that pose serious economic threats to aquaculture practice globally. Identification of Diplostomum at metacercariae stage has remained equivocal, hence lack of ... -
Efficacy of synergized and non-synergized Tagetes minuta methanol extract in controlling Periplaneta americana within households
(Malhotra Publishing House, 2015)In this study, comparative analysis of Sesamum indicum L. oil synergized and non-synergized methanol extract of the T. minuta were assayed against P. americana collected from households within Maseno Division, Kenya. The ...
