Faculty of Natural Sciences: Recent submissions
Now showing items 541-560 of 2620
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Investigation of electrochemical performance of the biosynthesized α-Fe2O3 nanorods
(ScienceDirect, 2019)This study concerns with the development of a facile method for the biosynthesis of α-Fe2O3 nanorods through green method with an extract from Persea Americana seeds and the potential use of these nanords in the electrochemical ... -
Opto-electronic properties of anodized TiO2 nanotube arrays investigated using electron energy loss spectroscopy
(sciencedirect, 2019)A study of the nanoscale crystallinity of anodized TiO2 nanotubes is reported with the aim of demonstrating its influence on the localized optical and electronic properties of the structure. By employing scanning transmission ... -
Remotely sensed c3 and c4 grass species aboveground biomass variability in response to seasonal climate and topography
(Wiley Online Library, 2019)Seasonal climate and topography influence C3 and C4 grass species aboveground biomass (AGB). Climate change further threatens these grasses AGB, thereby compromising their ability to provide ecosystem goods and services. ... -
Detecting marine heatwaves with sub-optimal data
(Frontiers, 2019)Marine heatwaves (MHWs), or prolonged periods of anomalously warm sea water temperature, have been increasing in duration and intensity globally for decades. However, there are many coastal, oceanic, polar, and sub-surface ... -
Multi-wavelength properties of radio- and machine-learning-identified counterparts to submillimeter sources in s2cosmos
(The Astrophysical Journal, 2019)We identify multi-wavelength counterparts to 1147 submillimeter sources from the S2COSMOS SCUBA-2 survey of the COSMOS field by employing a recently developed radio+machine-learning method trained on a large sample of ... -
An askap survey for hi absorption towards dust-obscured quasars
(Oxford Academic, 2019)Obscuration of quasars by accreted gas and dust, or dusty intervening galaxies, can cause active galactic nuclei (AGN) to be missed in optically selected surveys. Radio observations can overcome this dust bias. In particular, ... -
Polyethylene glycol (peg-400): An efficient one-pot green synthesis and anti-viral activity of novel α-diaminophosphonates
(Taylor & Francis Online, 2019)An efficient and eco-friendly protocol has been accomplished for a series of novel a-diaminophosphonates by a one-pot, three-component system via Kabachnik-Fields reaction of 4,40 -methylenedianiline, a variety of ... -
A highly responsive nh3 sensor based on pd-loaded zno nanoparticles prepared via a chemical precipitation approach
(ScienceDirect, 2019)The gas-detecting ability of nanostructured ZnO has led to significant attention being paid to the development of a unique and effective approach to its synthesis. However, its poor sensitivity, cross-sensitivity to humidity, ... -
A new sample of southern radio galaxies: Host-galaxy masses and star-formation rates
(Oxford University Press, 2019)In this study we define a new sample of distant powerful radio galaxies in order to study their host galaxy properties and provide targets for future observations of H I absorption with new radio telescopes and to understand ... -
In silico identification of micrornas as candidate Colorectal cancer biomarkers
(Sage Journals, 2019)The involvement of microRNA in cancers plays a significant role in their pathogenesis. Specific expressions of these non-coding RNAs also serve as biomarkers for early colorectal cancer diagnosis, but their laboratory/molecular ... -
A full treatment of peculiar velocities on the reionization light cone
(Oxford Academic, 2019)Accurate simulations of the 21-cm signal from the Epoch of Reionization require the generation of maps at specific frequencies given the values of astrophysical and cosmological parameters. The peculiar velocities of the ... -
Maximum sprite streamer luminosity near the stratopause
(AGU Advances, 2019)Sprites are composed of numerous streamers which exhibit transient luminosities in the upper middle atmosphere above thunderclouds after initiation by an intense positive lightning discharge, often followed by lightning ... -
Artist: Fast radiative transfer for large-scale simulations of the epoch of reionization
(Oxford University Press, 2019)We introduce the ‘Asymmetric Radiative Transfer In Shells Technique’ (ARTIST), a new method for photon propagation on large scales that explicitly conserves photons, propagates photons at the speed of light, approximately ... -
Hydrogen storage behavior of magnesium catalyzed by nickel-graphene nanocomposites
(ScienceDirect, 2019)In present study nanocomposites of Graphene Like Material (GLM) and nickel containing 5–60 wt % Ni were prepared by a co-reduction of graphite oxide and Ni2+ ions. These nanocomposites served as effective catalysts of ... -
A genetic geomorphic classification system for Southern African palustrine wetlands: Global implications for the management of wetlands in drylands
(Frontiers, 2019)Due to climatic constraints in dryland regions, wetlands usually occur at confluences of flow paths, whether from surface flow, inter-flow or at locations of groundwater discharge. Long-term landscape processes that shape ... -
Biosynthesis of silver nanoparticles using bitter leave (Veronica amygdalina) for antibacterial activities
(ScienceDirect, 2019)A green and facile biosynthesis of silver nanoparticles (SNPs) using dry Bitter leaves (DBL) (Vernonia amygdalina) aqueous extract as a capping and reducing agent was demonstrated in this work. The effect of the precursor's ... -
Strength estimation of evaporitic rocks using different testing methods
(Springer, 2019)Rock strength is defined as the limit of the ability of a rock to resist stress or deformation without breaking. Testing methods recommended by ISRM (International Society of Rock Mechanics) and ASTM (American Standards ... -
The observation of vibrating pear-shapes in radon nuclei
(nature communications, 2019)There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate ... -
Review: Karst springs in Shanxi, China
(Springerlink, 2019)China is one of a few countries in the world where karst is intensively developed and karst water is heavily utilized as water supply sources. Shanxi is such a Province with the largest karst distribution in places in ... -
Gravitational signal propagation in the double pulsar studied with the MeerKAT telescope
(Hans Publishers, 2022)The double pulsar PSR J0737−3039A/B has offered a wealth of gravitational experiments in the strong-field regime, all of which general relativity has passed with flying colours. In particular, among current gravity ...
