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Now showing items 594-613 of 676
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Single phase Bunsenite NiO nanoparticles green synthesis by Agathosma betulina natural extract
(Elservier, 2016-02-05)This contribution reports on the synthesis and the main physical properties of p-type NiO nanoparticles synthesized for the first time by a completely green process using Agathosma betulina plant extract as an effective ... -
Smallholder agriculture in African dryland agroecosystems has limited impact on trophic group composition, but affects arthropod provision of ecosystem services.
(Elsevier B.V., 2024-04-01)Agricultural intensification is a major driver of biodiversity loss, but the majority of studies highlighting these threats come from industrialised agriculture in temperate countries of the global North. However, more ... -
Socio-demographic Characteristics of Smallholder Farmers That Influence Their Competence in Rice Post-Harvest Value Addition, Southern Region of Sierra Leone.
(Horizon Research Publishing, 2023-08)This study on the influence of the socio-demographic characteristics of smallholder farmers on their competencies in rice post-harvest value addition was done in the Southern region of Sierra Leone. The study aimed at ... -
Socio-economic factors influencing household forest dependency in Chobe enclave, Botswana.
(Springer Open, 2017)Introduction: Human dependence on forests is a multifaceted phenomenon. The degree of reliance on forests varies geographically, overtime and across communities. These dynamics underpin the importance of understanding the ... -
Soil-plant-animal continuum in relation to macro and micro mineral status of Tswana sheep at Goodhope and Morale ranches in Botswana
(Botswana University of Agriculture & Natural Resources, 2014-09)This study reports the concentration of macro and micro minerals in soil, forage, water and blood of Tswana sheep at Morale and Goodhope ranches. The main aim of the study was to evaluate mineral status of soil, forage, ... -
Some potential sources for transmission of Campylobacter jejuni to broiler chickens
(Wiley, 2004-05-20)Aims: The aim of the study was to determine Campylobacter jejuni contamination and prevalence on fomites moving between broiler farms and the processing plant in the period after cleaning and before departure to harvest ... -
Some potential sources for transmission of Campylobacterjejuni to broiler chickens
(Wiley, 2004-05-20)S.S. R AMA B U, N.S. B OXA L L, P. MA DIE A N D S. G. FE NWI CK. 2004. Aims: The aim of the study was to determine Campylobacter jejuni contamination and prevalence on fomites moving between broiler farms and the processing ... -
Spatial and temporal variations of microinvertebrates across temporary floodplains of the lower Okavango Delta, Botswana
(Elservier, 2011-08-06)The connectivity of the Okavango Delta to its temporary floodplains may reduce due to threats of increasing human water demands and climate change. Microinvertebrates in aquatic systems have a regulatory effect on juvenile ... -
Spatial refuges buffer landscapes against homogenisation and degradation by large herbivore populations and facilitate vegetation heterogeneity.
(Sabinet African Journals, 2017-08-16)Environmental heterogeneity across savanna landscapes, including different seasonal resources at different distances to water, may play a critical role in maintaining the size and diversity of wildlife populations and the ... -
Spatial variability of aquatic macroinvertebrate assemblages in the Okavango Delta, Botswana: considerations for developing a rapid bioassessment tool
(Taylor & Francis, 2020-07-02)Spatial variability in macroinvertebrate assemblages of the Okavango Delta, Botswana, was examined to evaluate differences in assemblages at a regional and habitat scale. Sampling was undertaken six times during a one-year ... -
Spatial variability of measured soil properties across site‐specific management zones
(Soil Science Society of America Journal, 2005-09)The spatial variation of productivity across farm fields can be classified by delineating site‐specific management zones. Since productivity is influenced by soil characteristics, the spatial pattern of productivity could ... -
Spatiotemporal trend analysis of groundwater level changes, rainfall, and runoff generated over the Notwane Catchment in Botswana between 2009 and 2019.
(Springer Science and Business Media, 2023-03-11)The semi-arid south-eastern part of Botswana has recently been experiencing severe water shortages, and the demand currently surpasses the supply in the greater Gaborone area. Within the context of increased stormwater ... -
Species richness, diversity, density and spatial distribution of soil seed banks in the riparian woodland along the Thamalakane River of the Okavango Delta, northern Botswana.
(Elsevier B.V., 2021-10-21)Soil seed banks serve as reservoirs of seeds for subsequent regeneration of plants. Soil seed banks were investigated along the Thamalakane Riparian Woodlands (hereafter referred to as TRWs) of the Okavango Delta, northern ... -
Sprawl dynamics and the development of effective smart growth policies
(The Pennsylvania State University, 2006-11-15)Sprawling urban development is a major driving force of global environmental change. Its impact on Earth system functions is likely to increase in the future when the proportion of the world’s population living in urban ... -
The status of honeybees (Apis mellifera scutellata) colonies in Hurugwe Safari Area-Rifa section, northern Zimbabwe.
(Taylor & Francis Online, 2022-08-07)Species Distribution Models (SDM) play an essential role in establishing factors affecting honeybee species spatial population distribution and ensuring effective niche habitat protection. This study aimed to assess the ... -
Stearoyl-CoA desaturase 1 3′UTR SNPs and their influence on milk fatty acid composition of Canadian Holstein cows
(Wiley, 2009-09-16)Stearoyl-CoA desaturase 1 (SCD1) catalyses the synthesis of conjugated linoleic acid (CLA) and mono-unsaturated fatty acids (MUFA) in the mammary gland of ruminant animals. Considerable variations in CLA and MUFA have been ... -
Sterols as a biomarker in tracing niger and sesame seeds oils adulterated with palm oil.
(Elsevier Ltd, 2021-04)Food adulteration is a serious social problem all over the world. The oil obtained from the niger and sesame is known for its quality and has a high market value in Ethiopia. The cost of the oil obtained from these oilseed ... -
Storage temperature and atmosphere influenced postharvest quality of marula (sclerocarya birrea subspecies caffra) fruits
(BUAN, 2020-07)Low temperature storage is the most effective technology for maintaining quality and extending the postharvest life of fresh horticultural produce. However, horticultural produce of tropical and subtropical in origin are ... -
Structural, optical and magnetic investigation of Gd implanted CeO2 nanocrystals
(Elservier, 2017-10-15)Gadolinium implanted cerium oxide (Gd-CeO2) nanocomposites is an important candidate which have unique hexagonal structure and high K- dielectric constant. Gd-CeO2 nanoparticles were synthesized using hydrothermal method. ... -
Structural, Optical, Morphological and Microbial Studies on SnO2 Nanoparticles Prepared by Co-Precipitation Method
(American Scientific Publishers, 2018-05-05)Nanoparticles of tin oxide (SnO2) powders were prepared by co-precipitation method at 500 °C, 700 °C and 900 °C temperature. The sintered SnO2 nanoparticles, structural, optical, magnetic, morphological properties and ...