Research Papers/Topics in Biological Science

The Effects of Pollution on The Physico-Chemical Parameters of Water And Diversity of Aquatic Macroinvertebrates: A Case Study of The khami Dam.

ABSTRACT The impact of industrial effluent discharged into Khami Dam was assessed through physicochemical parameters and also by bio-monitoring of benthic macro-invertebrates. Samples for physico-chemical parameters were measured at three sites over a period of six months and sampling was done once each month. Composite samples of 1000ml for nitrates and phosphates were collected using a beaker on all sites and placed on schott bottles and placed on ice filled cooler boxes and were then ...

An Investigation Into The Effects Of Storage Periods On Germination Vigour And Malt Quality In Malting Barley (Hordeum Vulgare), Variety “Hope” :A Case Study At Delta Beverages, Kwekwe Maltin

ABSTRACT Malts with high extract values, high enzymatic activities and good modification are fundamental to increase the brewing yield and efficiency. To produce malt that meets these requirements, the barley employed must have minimal post-harvest dormancy and be able to germinate rapidly and uniformly. The aims of this study were to assess the changes in seed germination vigour trends and the general storage stability of a Zimbabwean two-row malting barley variety “Hope” as the po...

A Comparison Between Molecular And Serological Methods In The Detection Of Bovine Brucella Species

ABSTRACTBovine brucellosis is endemic in Zimbabwe and is an important veterinary disease, responsible for large losses in livestock through abortions and still-born calves. It is also a zoonotic disease and as such poses a threat to public health. For this reason, it is important for every farmer to know the status of their herd. This study was carried out to compare the reliability of serological tests with molecular test in the detection of bovine brucellosis. A total of 17 whole blood and ...

Evaluation Of The Interaction Between Beauveria Bassiana And An Aphicide For The Management Of The Tobacco Aphid Myzus Persicae Nicotianae

ABSTRACTAphids (Myzus persicae nicotianae) cause damage by sucking sap from the plants leading todistortion and wilting of the foliage, and eventually reducing economic yields. In order tominimise losses to viral diseases, it is important to use insecticides in association with fungi tocontrol insect pests in an environmental and ecological friendly way without contaminating theenvironment. A study was carried out from October, 2013 at Kutsaga Research Station in thelaboratory to evaluate the...

A comparative study of antibacterial properties of Elephantorrhiza elephantine (Muzezapasi) and Zanthoxylum chalybeum (Mukundanyoka) against those of commercial drug Azithromycin on Escherich

AbstractA study was carried out at the Midlands State University during the month of September2016, to compare the antibacterial properties of Elephantorrhiza elephantine (Muzezapasi)and Zanthoxylum chalybeum (Mukundanyoka), against those of the commercial drugAzithromycin on Escherichia coli. Plant extracts were purchased, sun dried and ground intofine powders. Azithromycin tablets were also purchased. Escherichia coli bacteria wereisolated from the University toilets. Confirmatory tests wer...

New fungicides for the management of pythium root rot in floatbed seedling production system

ABSTRACTPythium root rot possess major threats on float bed seedling productions. It is caused by oomycetes in the Pythium genus. It causes a huge of loss money as well as the seedlings. It is critically important to control this disease before it causes economic losses. A study was carried out from September 2013 to November 2013 at Kutsaga Research Station in the greenhouse. The purpose of the study was to evaluate the efficacy of metalaxyl + mancozeb from a new source (Citchem) for the con...

Bacteriological Quality Of Bottled Drinking Water Versus Municipality Tap Water In Bulawayo, Zimbabwe

ABSTRACTThe most important characteristics of drinking water that have to be assured, monitored and conserved are its safety. Water safety is a growing concern as its quality is not thoroughly monitored especially in third world countries due to lack of proper labs and funding. Unsafe water contains a lot of microorganisms that are a threat to health, most of which contain faecal coliforms that cause serious illnesses like gastrointestinal diseases. Due to the present Zimbabwe water status, t...

Genetic Diversity Of Ganoderma Species In The North-Eastern Parts Of Namibia

AbstractThe genus Ganoderma Karst. (1881) is the largest and most complex genus of polypore fungi, characterized by the presence of pores instead of the gills on the lower side of the fruiting body. The colonisation of Ganoderma species on trees is noticed by the appearance of their cap shaped, hard, crusty and shiny fruiting bodies. Ganoderma extract have been used for centuries in Asia’s traditional medicine and to date Ganoderma mushrooms are an important source of modern medicinal and n...

A Taxonomic, Ecological And Nutritional Study Of Porphyra Capensis Kützing Populations From The Namibian Coast

ABSTRACTThe Namibian Porphyra capensis Kützing was studied as very little was known of its taxonomy, ecology, phylogeny or nutritional status. It was hypothesized that it was phlogenetically related to the South African P. capensis as they share common ancestry. DNA was extracted from thalli and partial sequences obtained from their 18SrDNA and ITS regions. GenBank sequences of interest were incorporated, alignments made and phylogenetic trees were generated using MEGA 5.1. The results showe...

Evaluation Of Selected Namibian Ethno-Medicinal Plants For Anti-HIV Properties

ABSTRACT Namibian ethno-medicinal plants have not yet been evaluated for their efficacy in inhibiting the activities of Human Immunodeficiency Virus (HIV) reverse transcriptase (RT) and their toxicological effects to mammalian cells have not yet been reported. Hence the aims of this study were: (1) to evaluate selected Namibian plants for their biological activities against RT; (2) to evaluate their toxicity to mammalian cells, and (3) to isolate and characterize the active compounds fr...

Lack of polymorphism suggests a recent bottleneck of Aloidendron pillansii

Abstract The Karoo-Namib is a species rich region in which many iconic and keystone species are found, such as Aloe pillansii. The recent population history of A.pillansii is poorly understood. However the suggested climatic shifts that occurred throughout the Holocene era may have affected its distribution, demographics and gene flow. The glacial/interglacial refugia hypothesis predicts that the southernmost population served as a refuge population and that the subsequent expansion ...

A Study Of The Nutrition And Health Of Children In The Gold Coast A Field And Laboratory Study

INTRODUCTION Despite wide interest in the nutrition and health of children in underdeveloped areas of the world, countries in Africa have been neglected by individuals and groups in the United States as sites for dietary and health studies. Reasons for this doubtless lie elsewhere than in a lack of interest. Such study not only offers the possibility of providing information needed by the indigenous population, but also information concerning the nutritive needs of children in relation ...

DETERMINATION OF PLASMODIUM FALCIPARUM AND HOST GENETIC FACTORS THAT AFFECT THE EFFICACY OF THE ARTEMISININ-BASED COMBINATION PARTNER DRUGS USED IN GHANA

ABSTRACTMalaria is one of the major causes of morbidity and mortality in sub-Saharan Africa, especially in children under 5 years and pregnant women. The use of Artemisinin-based combination therapy (ACT), which is a combination of a fast-acting artemisinin derivative and a relatively slow-acting partner drug, is used for malaria treatment in disease-endemic areas. The ACT partner drugs in Ghana are lumefantrine (LUM), amodiaquine (AQ), and piperaquine (PQ). Plasmodium falciparum isolates wit...