Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 164-183 of 4818
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The Alpine vascular plants of Baxter State Park, Maine, USA
(The New England Botanical Club, 2017)We conducted 12 days of field surveys on five mountains over 1100 m in elevation (Katahdin, North Brother, South Brother, Mount Coe, and The Owl) in Baxter State Park (BSP), Maine during the summers of 2013–14. In addition, ... -
Alteration paragenesis and the timing of mineralised quartz veins at the world-class Geita Hill gold deposit, Geita Greenstone Belt, Tanzania
(Elsevier, 2017)The world-class Geita Hill deposit is one of the largest gold deposits located within the Geita Greenstone Belt in NW Tanzania. The deposit is hosted within a complexly deformed sedimentary package dominated by ironstone ... -
Altered fatty acid metabolism due to rifampicin-resistance conferring mutations in the rpoB gene of mycobacterium tuberculosis: mapping the potential of pharmaco-metabolomics for global health and personalized medicine
(Mary Ann Liebert Inc, 2012)We investigated the use of gas chromatography mass spectrometry (GC-MS) metabolomics to better characterize rifampicin-resistance by comparing the fatty acid metabolomes of two rpoB mutant Mycobacterium tuberculosis strains ... -
The altered human serum metabolome induced by a marathon
(Springer, 2018)Introduction Endurance races have been associated with a substantial amount of adverse effects which could lead to chronic disease and long-term performance impairment. However, little is known about the holistic metabolic ... -
Altered mitochondrial respiration and other features of mitochondrial function in Parkin-mutant fibroblasts from Parkinson’s disease patients
(Hindawi, 2016)Mutations in the parkin gene are the most common cause of early-onset Parkinson’s disease (PD). Parkin, an E3 ubiquitin ligase, is involved in respiratory chain function, mitophagy, and mitochondrial dynamics. Human cellular ... -
An altered mycobacterium tuberculosis metabolome induced by katG mutations resulting in isoniazid resistance
(American Society for Microbiology, 2014)The most common form of drug resistance found in tuberculosis (TB)-positive clinical samples is monoresistance to isoniazid. Various genomics and proteomics studies to date have investigated this phenomenon; however, the ... -
Alternaria alternata, the causal agent of leaf blight of sunflower in South Africa
(Springer, 2018)Sunflower (Helianthus annuus L.) is an important oilseed crop in South Africa, and is grown in rotation with maize in some parts of North West, Limpopo, Free State, Mpumalanga and Gauteng provinces. Alternaria leaf blight ... -
Alternaria toxins in South African sunflower seeds: cooperative study
(Springer, 2017)Sunflower seed samples (N = 80) from different sunflower cultivars originating from different localities in South Africa were analyzed for 15 toxins produced by fungi of the genus Alternaria by means of a simple one-step ... -
An alternative approach to weighted non-commutative Banach function spaces
(Springer, 2019)We use a weighted analogue of a trace to define a weighted non-commutative decreasing rearrangement and show its relationship with the singular value function. We further show an alternative approach to constructing weighted ... -
Alternative conceptions: turning adversity into advantage
(Springer, 2019)While a vast body of research has identified difficulties in students’ understanding about forces and acceleration and their related alternative conceptions, far less research suggests ways to use students’ alternative ... -
Alternative development in polystoma gallieni (platyhelminthes, monogenea) and life cycle evolution
(ELSEVIER, 2013)Considering the addition of intermediate transmission steps during life cycle evolution, developmental plasticity, canalization forces and inherited parental effect must be invoked to explain new host colonization. Unf ... -
Alternative nematode management strategies
(Springer, 2017)In South Africa, about 48 % of the people live in rural areas. A large portion (35 %) of this rural population lives below the poverty line. Most of these communities depend on the production of grain, leguminous and ... -
Aluminum triflate-cocatalyzed radical copolymerization of styrene and ethyl acrylate
(Springer, 2020)Various random copolymers, poly(styrene-co-ethyl acrylate), were synthesized by free radical bulk copolymerization cocatalyzed by aluminum triflate (Al(OTf)3). The experimental conditions for the polymerization reactions, ... -
An amazing sub-cambium flat mite from South Africa (Acari: Trombidiformes: Tenuipalpidae)
(Acarologia, 2019)An unusual sub-cambium flat mite, Phytoptipalpus occultuae sp. n., first found under the bark in blisters on stems of Senegalia caffra in Pretoria, South Africa is described and illustrated herein. This is a unique species ... -
Ambient aromatic hydrocarbon measurements at Welgegund, South Africa
(EGU, 2014)Aromatic hydrocarbons are associated with direct adverse human health effects and can have negative impacts on ecosystems due to their toxicity, as well as indirect negative effects through the formation of tropospheric ... -
Ambient particulate air pollution and daily mortality in 652 cities
(Massachusetts Medical Society, 2019)BACKGROUND The systematic evaluation of the results of time-series studies of air pollution is challenged by differences in model specification and publication bias. METHODS We evaluated the associations of inhalable ... -
Amelioration of iron mine soils with biosolids: effects on plant tissue metal content and earthworms
(Springer, 2016)The achievement of environmentally sound and economically feasible disposal strategies for biosolids is a major issue in the wastewater treatment industry around the world, including Swaziland. Currently, an iron ore mine ... -
An amended description of two Gyrodactylus species (Platyhelminthes: Monogenea) parasitizing Antarctic Notothenioid fish
(Cambridge Univ Press, 2020)Species identification based on the morphometry of opisthaptoral hard parts, in combination with internal transcribed spacer ribosomal DNA (ITS rDNA) region sequences, confirmed the presence of four viviparous Gyrodactylus ... -
Amino acid based imidazolium zwitterions as novel and green corrosion inhibitors for mild steel: experimental, DFT and MD studies
(Elsevier, 2017)Three novel amino acids based corrosion inhibitors namely 2-(3-(carboxymethyl)-1H-imidazol-3-ium-1-yl)acetate (AIZ-1), 2-(3-(1-carboxyethyl)-1H-imidazol-3-ium-1-yl)propanoate (AIZ-2) and 2-(3-(1-carboxy-2-phenylethyl)-1H ... -
Ammonia-oxidizing microorganisms: key players in the promotion of plant growth
(Instituto de Agroindustria, 2017)Nitrogen (N) is the most important mineral nutrient required by plants. Although some plants can directly utilize N, ammonium (NH4+) and nitrate (NO3-) are the only forms of N that are usable to most plants. Ammonia-oxidizing ...