Browsing Faculty of Natural Sciences by Title
Now showing items 205-224 of 2567
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Biodiversity: so much more than legs and leaves
(AOSIS OpenJournals, 2013)Microorganisms inhabit virtually every possible niche on Earth, including those at the outer envelope of survival. However, the focus of most conservation authorities and ecologists is the ‘legs and leaves’ side of biology ... -
Biological synthesis of gold and silver nanoparticles using leaf extracts of Crassocephalum rubens and their comparative in vitro antioxidant activities
(Elsevier, 2020)The use of plant and plant products in the synthesis of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) is made possible because of the natural inherent phytochemicals responsible for the reduction of respective ... -
Biomass Energy Dependence in South Africa: Are the Western Cape Province households descending the energy ladder after improvement in electricity access?
(Elsevier, 2020)South Africa was considered to have attained universal access to modern energy from 1994 to 2012. This meant that the number of households that moved away from the use of dirty energy to ... -
Biomass partitioning in an endemic southern African salt marsh species Salicornia tegetaria (Chenopodiaceae)
(Taylor and Francis Group, 2020)The below ground biomass of salt marsh species accounts for more than half of the total plant biomass in salt marsh systems, yet no biomass data exist for salt marsh species in South Africa. ... -
Biomass-derived activated carbon as high-performance non-precious electrocatalyst for oxygen reduction
(Royal Society of Chemistry, 2013)A new type of Fe and N doped carbon material is synthesized by pyrolyzing ferric chloride doped egg white (EW) and the proposed synthetic route is easy, green, and low-cost. In addition, the as-prepared sample exhibits ... -
Biomedical Relevance of Novel Anticancer Peptides in the Sensitive Treatment of Cancer
(MDPI, 2021)The global increase in cancer mortality and economic losses necessitates the cautious quest for therapeutic agents with compensatory advantages over conventional therapies. Anticancer peptides (ACPs) are a subset of host ... -
Biosensors as early warning detection systems for waterborne cryptosporidium
(IWA Publishing, 2023)Waterborne disease is a global health threat contributing to a high burden of diarrhoeal disease, and growing evidence indicates a prospective increase in incidence coinciding with the profound effects of climate change. ... -
Biosynthesis of silver nanoparticles using Bersama engleriana fruits extracts and their potential inhibitory effect on resistant bacteria
(MDPI, 2022)The absence of novel, safe, and effective bactericide is an urgent concern worldwide and remains a challenge in scientific communities. The unique proprieties of silver nanoparticles (SNPs) synthesized from plant extracts ... -
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 ... -
Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles
(Multidisciplinary Digital Publishing Institute, 2020-09-19)In this study, procyanidin dimers and Leucosidea sericea total extract (LSTE) were employed in the synthesis of silver nanoparticles (AgNPs) and characterized by ultraviolet-visible (UV-Visible) spectroscopy, high-resolution ... -
Bis(ferrocenylimine)palladium(II) and platinum(II) complexes: synthesis, molecular structures and evaluation as antitumor agents
(Elsevier, 2012)Compounds (ferrocenyl-2-furylmethyl)imine (L1), (ferrocenyl-2-thiophenemethyl)imine (L2) and (ferrocenyl-2-thiopheneethyl)imine (L3) were synthesized by condensation reactions and obtained in very good yields. Reactions ... -
Black hole - galaxy correlations without self-regulation
(American Astronomical Society, 2013)Recent models of black hole growth in a cosmological context have forwarded a paradigm in which the growth is self-regulated by feedback from the black hole itself. Here we use cosmological zoom simulations of galaxy formation ... -
Black tea aqueous extracts improve human sperm functions: an in vitro study
(Wiley-Hindawi, 2023)Infertility affects about 25% of couples worldwide, and oxidative stress (OS) is linked to its idiopathic etiology. Green, black, white, and oolong teas are produced from Camellia sinensis, depending on their oxidation ... -
Blood pressure gradients and cardiovascular risk factors in urban and rural populations in Abia State South Eastern Nigeria using the WHO STEPwise approach
(Public Library of Science, 2013)Background: Developing countries of sub-Saharan Africa (SSA) face a double burden of non-communicable diseases (NCDs) and communicable diseases. As high blood pressure (BP) is a common global cardiovascular (CV) disorder ... -
A blueprint for integrating scientific approaches and international communities to assess basin-wide ocean ecosystem status
(Nature Research, 2023)Ocean ecosystems are at the forefront of the climate and biodiversity crises, yet we lack a unified approach to assess their state and inform sustainable policies. This blueprint is designed around research capabilities ... -
Bode phase angle signaling of a TB disease biomarker
(Multidisciplinary Digital Publishing Institute (MDPI), 2023)Tuberculosis (TB) is a worldwide burden whose total control and eradication remains a challenge due to factors including false positive/negative diagnoses associated with the poor sensitivity of the current diagnostics in ... -
Body of evidence: forensic use of baseline health assessments to convict wildlife poachers
(CSIRO Publishing, 2013)CONTEXT. Given the immense impact of wildlife trade, disease and repatriations on populations, health assessments can" "provide powerful forensic material to help convict wildlife poachers and minimise risks of releasing ... -
Book review: estimating groundwater recharge
(Springer Verlag, 2011) -
Book review: urban geology
(Springer Verlag, 2012) -
Boosting LiMn2O4 diffusion coefficients and stability via Fe/Mg doping and MWCNT synergistically modulating microstructure
(Hindawi, 2024)The dissolution of manganese and its deposition on the anode surface cause poor cycling stability in lithium-ion batteries. To alleviate these issues, this study probes the electrochemical activity of highly crystalline ...