Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 612-631 of 4825
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Charge transport, interfacial interactions and synergistic mechanisms in BiNbO4/MWO4 (M = Zn and Cd) heterostructures for hydrogen production: insights from a DFT+U study
(RSC, 2017)In the 21st century, the growing demand of global energy is one of the key challenges. The photocatalytic generation of hydrogen has attracted extensive attention to discuss the increasing global demand for sustainable and ... -
The charge-sign dependent effect in the solar modulation of cosmic rays
(Elsevier, 2014)The centennial anniversary of the discovery of cosmic rays was in 2012. Since this discovery considerable progress has been made on several aspects related to galactic cosmic rays in the heliosphere. It is known that they ... -
Charge-sign dependent modulation of cosmic ray electrons and positrons up to extreme solar maximum conditions
(PoS, 2017)The charge-sign dependent modulation of cosmic rays is an important topic in solar modulation studies, providing insights into gradient, curvature, and current sheet drifts. Such studies, at higher levels of solar activity, ... -
The charismatic praying mantid: a gateway for insect conservation
(Taylor & Francis, 2020)Praying mantids (Mantodea) are not only apex predators with a ‘mystical’ status, but are also regarded as a kind of oracle and, in some cultures, as omens associated with good or bad. In the future, the cultural, mystical ... -
Cheap 0.36 dB broadband multipath LNA
(Institution of Engineering and Technology (IET), 2012)A two-path low-noise amplifier (LNA) designed for the planned MeerKAT radio telescope is presented. The LNA has a noise figure (NF) of less than 0.36 dB and input return loss of less than 12 dB from 0.7 to 1.8 GHz. It ... -
Chebyshev collocation method for the solution of a system of second-order boundary value problems
(SAS International Publications, 2016)In this paper, we present a new numerical approach based on Chebyshev polynomials of the first kind for solving a system of second-order boundary value problems associated with obstacle, unilateral and contact problems. ... -
Checklist of acanthocephalan parasites of South Africa
(Pensoft, 2018)Twenty-one species of acanthocephalans, representative of thirteen genera from ten families of seven orders and three classes, are included in this updated checklist of acanthocephalans in South Africa. Although South ... -
Chemical additives enhance the activity of a Bt‐based biopesticide targeting the beet webworm larvae
(Wiley, 2020)Spoladea recurvalis (Fbr.) (Lepidoptera: Crambidae) larvae can cause up to 100% foliage loss on amaranths during severe outbreaks. The Bacillus thuringiensis Subsp. kurstaki product Halt® is a biologically safe biopesticide ... -
Chemical and physical characterization of spent coffee ground biochar treated by a wet oxidation method for the production of a coke substitute
(Elsevier, 2020)Coke production relies on the availability, cost and quality of coking coal. Depleting coking coal resources and environmental pressure force the metallurgical industry to search for alternative methods to produce coke. ... -
Chemical and structural characterization of char development during lignocellulosic biomass pyrolysis
(Elsevier, 2017)The chemical and structural changes of three lignocellulosic biomass samples during pyrolysis were investigated using both conventional and advanced characterization techniques. The use of ATR-FTIR as a characterization ... -
Chemical Composition and Dry Matter Yield of Cowpea (Vigna unguiculate L Walp) Haulms as Fodder for Ruminants
(Kamla-Raj, 2016)The purpose of the study was to determine chemical composition and dry matter yield of cowpea haulms (Sejwaleng, Lebudu and Morathathane) grown in Limpopo Province, South Africa. Randomized complete block design was used ... -
The chemical composition and fluxes of atmospheric wet deposition at four sites in South Africa
(Elsevier, 2016)South Africa is the economic hub of southern Africa and is regarded as an important source region of atmospheric pollutants. A nitrogen dioxide (NO2) hotspot is clearly visible from space over the South African Mpumalanga ... -
Chemical composition, main sources and temporal variability of PM1 aerosols in southern African grassland
(EGU, 2014)Southern Africa is a significant source region of atmospheric pollution, yet long-term data on pollutant concentrations and properties from this region are rather limited. A recently established atmospheric measurement ... -
Chemical composition, nitrogen degradability and in vitro ruminal biological activity of tannins in vines harvested from four tropical sweet potato (Ipomoea batatas L.) varieties
(Wiley, 2016)This study investigated the potential of vines from four sweet potato varieties (Tia Nong 57, Tia Nong 66, Ligwalagwala and Kenya) as alternative feed resources for ruminant livestock. The chemical composition [neutral ... -
Chemical Evaluation of South African Prickly Pear Cladodes Varieties as Fodder for Ruminants Grown in Mara ADC, South Africa
(Kamla-Raj, 2016)The aim of the study was to determine the chemical composition of South African prickly pears cladodes varieties as fodder for ruminants in Mara ADC, South Africa. The experimental field was divided into four replications ... -
Chemical oxidative polymerization of m-phenylenediamine and its derivatives using aluminium triflate as a co-catalyst
(Elsevier, 2013)Aromatic diamine monomers, including m-phenylenediamine (mPD), 2-methyl-m-phenylenediamine (2Me-mPD), 4-methyl-m-phenylenediamine (4Me-mPD) and trimethyl-mphenylenediamine (tMe-mPD), were polymerized by chemical oxidation ... -
Chemical toxicity of surface-based drinking water sources due to natural uranium pollutant around Princess Gold Mine Environs in Roodepoort, South Africa
(Springer, 2016)The activity level of natural uranium pollutant in surface-based water around Princess Gold Mine in Roodepoort, South Africa was measured using inductively coupled plasma mass spectrometry. The highest activity level of ... -
Chemically oxidative polymerization of aromatic diamines: the first use of aluminium-triflate as a co-catalyst
(Elsevier, 2013)Aromatic diamine monomers, including o-phenylenediamine (oPD), p-phenylenediamine (pPD), 4,4′-diaminodiphenylenemethane (DADPM) and benzidine (BZN), were polymerized by chemical oxidation using sodium persulfate, potassium ... -
Chemoprotective properties of rooibos (Aspalathus linearis), honeybush (Cyclopia intermedia) herbal and green and black (Camellia sinensis) teas against cancer promotion induced by fumonisin B1 in rat liver
(Elsevier, 2009)The chemoprotective properties of unfermented and fermented rooibos (Aspalathus linearis) and honeybush (Cyclopia intermedia) herbal teas, and green and black teas (Camellia sinensis) were investigated against fumonisin ... -
Chicken diseases and their ethno-botanical treatments among the rural poor in southern Zambia, Africa
(Fundación CIPAV, Cali, Colombia, 2017)Village chicken production is widespread among rural farmers in Zambia because such chickens provide immediate proteins and cash to poor rural communities. Furthermore village chickens are very resistant to common diseases ...