Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"QK Botany"”.
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Study on the properties of gold nanoparticles as plasmonic sensing material for chlorothalonil detection
Chlorothalonil-based fungicide has been employed extensively to prevent various fungal diseases in plants to increase yield of crops. Conversely, over-usage of chlorothalonil can have adverse effects to human health and environment. An optical sensor implemented Localized Surface Plasmon Resonance …
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Characterization and optimization of bioactive compounds from herbal plants using microwave assisted infusion
Phytochemicals study of herbal plants have received increased attention due to the biological benefits to human health, especially on oxidative stress related disease. Recently, microwave oven is favourable in extracting herbal plant phytochemicals due to the effectiveness in extracting the …
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Documentation and evaluation of medicinal plants with potential for breast cancer therapy as used by Jakun Community of Kampung Peta, Mersing, Johor
Breast cancer (BC) is the most commonly diagnosed cancer and the leading cause of cancer-related death among women globally. Traditional knowledge (TK) could be a means for the development of new BC treatment; however, TK is perishing due to socialisation and lack of natural resources conservation. …
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Evaluation of biomass from the halotolerant microalga Dunaliella salina as an animal feed additive with immune-modulatory activity
The work presented in this thesis sought to evaluate the potential of microalgal biomass sourced from Dunaliella salina for use as an animal feed additive. Dunaliella salina is the richest known source of carotenoid pigments and anti-oxidants, and these have a variety of uses including as food …
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Culturing and processing of Dunaliella for enrichment of enzymatic antioxidants
Dunaliella, a singled cell microalga, accumulates antioxidants as the main line of defence against reactive oxygen species to protect the cell from oxidative stress-induced damage. The high adaptability of this halotolerant Dunaliella makes this alga a promising and a sustainable natural source of …
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Comparative enzymology of wheat germ aspartate transcarbamoylase and related studies
Studies on aspartate transcarbamoylase from various organisms have been reviewed. The amino acid composition, isoelectric point and peptide maps of purified wheat germ aspartate transcarbamoylase have been elucidated and compared to the E.coli enzyme. Three types of essential amino acid residues …
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Antioxidant activity and phytochemical evaluations of selected medicinal plants
The methanolic crude extract of aerial parts of the plant Scrophularia nodosa was shown to have potent DPPH radical scavenging activity (IC50 = 48.75 ± 7.00 μg/ml). Activity-guided fractionation resulted in the isolation of three principal antioxidant compounds; acteoside, angoroside C and …
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UV-resistance locus 8 and UV-B specific signaling in Arabidopsis thaliana
UV-B is a natural component of the sunlight spectrum. As a result of the potentially harmful effects of this radiation, plants have evolved a highly effective suit of protective and repair mechanisms. However, the signalling pathways that control such responses are not yet well known. For example …
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An investigation into the role of the ubiquitin-proteasome system in plant defence
Ubiquitin is a highly conserved regulatory protein that is ubiquitously expressed in eukaryotes. The ubiquitin pathway appears to be more diversified in plants compared to the other organisms. In plants, the ubiquitin-26S proteasome pathway appears to be particularly involved in regulating plant …
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The biochemistry and molecular biology of intercellular adhesion in plant tissue culture
The adhesion between neighbouring plant cells is established as cells are formed during cytokinesis through the middle lamella that is made principally of pectins and proteins. Pectins are secreted into the cell wall in a highly methylesterified form and subsequently de-esterified in muro by pectin …
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Characterisation of the PQ-loop repeat membrane protein family in arabidopsis thaliana
This thesis describes the characterisation of the PQ-loop repeat family, a novel family of membrane proteins from Arabidopsis thaliana. The family consists of six members (AtPQL1-6) all predicted to contain seven transmembrane segments and two copies of the PQ-loop domain. The repeated PQ-loop …
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Structure-function analysis of phototropin receptor kinases
The ability of plants to convert energy provided by the sun into a form accessible by heterotrophic organisms ensures that they form a basal part of most ecosystems. However, in addition to being a vital energy source light can also serve as an environmental indicator. In order to maximise light …
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A study of salt tolerance in Arabidopsis thaliana and Hordeum vulgare
ABSTRACT The original objective of this work was to compare the cellular processes in salt tolerant and salt sensitive plants cells to gain insight into the mechanisms that confer halotolerance. Halotolerant and salt sensitive cell lines were derived from the model glycophyte Arabidopsis thaliana; …
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The Influence Of The Circadian Clock On Stomal Conductance And Carbon Assimilation In Arabidopsis thaliana
Plants have evolved an internal feedback system of gene expression, the circadian clock, to allow for adaptations to changes in diurnal conditions to maximise their ability to utilise the environment for nutrients and growth. The circadian clock aligns the plants processes with fixed external …
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The influence of the evolution of anatomical characters on leaf hydraulic capacity
Over geological time, changes in climatic factors have contributed to the evolution of plants. CO2 is one environmental factor that affects plants, and changes in CO2 concentration ([CO2]) in the atmosphere across geological time have been thought to have driven evolutionary changes in plant leaf …
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Chromosome studies in the genera Lycopersicon and Solanum
This thesis comprises two Parts and concerns the cytology of Lycopersicon and Solanum. Part I was a study of pachytene in Lycopersicon and began as an attempt to assess the usefulness of this stage as a source of information to aid classification. The principal findings of this thesis were as …
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Systematic studies in the genus Solanum in Africa
Africa is a major centre of diversity in the large cosmopolitan genus Solanum. The genus is an important component of the African flora, and, with a variety of uses, many of the species have a significant interaction with man. The objective of the present study was an elucidation of some of the …
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Thermal biology and behaviour of two predatory Phytoseiid mites: Amblyseius swirskii (Athias-Henriot) (Acari:Phytoseiidae) and Phytoseiulus longipes (Evans) (Acari:Phytoseiidae)
Amblyseius swirskii and Phytoseiulus longipes are targeted as biological control agents for the horticultural pest Tetranychus urticae. This study applies a standardised protocol to evaluate the risk of establishment of introduced species and investigates temperature related behavioural thresholds …
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