Browsing Natural and Agricultural Sciences by Title

Browsing Natural and Agricultural Sciences by Title

Sort by: Order: Results:

  • dc-Hydrogen plasma induced defects in bulk n-Ge 
    Nyamhere, Cloud; Venter, Andre; Murape, D.M.; Auret, Francois Danie; Coelho, Sergio M.M.; Botha, J.R. (Elsevier, 2012-08)
    Bulk antimony doped germanium (n-Ge) has been exposed to a dc-hydrogen plasma. Capacitance-voltage depth profiles revealed extensive near surface passivation of the shallow donors as evidenced by ˜ a 1.5 orders of magnitude ...
  • DDT and pyrethroid resistance in Anopheles arabiensis from South Africa 
    Nardini, Luisa; Christian, Riann N.; Coetzer, Nanette; Koekemoer, Lizette L. (EDP Sciences, 2013-08-08)
    BACKGROUND: Pyrethroid resistance has been well documented in Anopheles arabiensis, one of the major African malaria vectors, and the predominant malaria vector in South Africa. METHODS: In this study, the genetic basis ...
  • A de novo 2.2 Mb recurrent 17q23.1q23.2 deletion unmasks novel putative regulatory non-coding SNVs associated with lethal lung hypoplasia and pulmonary hypertension : a case report 
    Karolak, Justyna A.; Gambin, Tomasz; Honey, Engela M.; Slavik, Tomas; Popek, Edwina; Stankiewicz, Paweł (BioMed Central, 2020-03-06)
    BACKGROUND : Application of whole genome sequencing (WGS) enables identification of non-coding variants that play a phenotype-modifying role and are undetectable by exome sequencing. Recently, non-coding regulatory single ...
  • Dead or alive? Comparing costs and benefits of lethal and non-lethal human-wildlife conflict mitigation on livestock farms 
    McManus, Jeannine S.; Dickman, A.J.; Gaynor, David; Smuts, B.H.; Macdonald, David W. (Cambridge University Press, 2015-11)
    Livestock depredation has implications for conservation and agronomy; it can be costly for farmers and can prompt retaliatory killing of carnivores. Lethal control measures are readily available and are reportedly ...
  • Dead-reckoning animal movements in R : a reappraisal using Gundog.Tracks 
    Gunner, Richard M.; Holton, Mark D.; Scantlebury, Mike D.; Van Schalkwyk, Ockert Louis; English, Holly M.; Williams, Hannah J.; Hopkins, Phil; Quintana, Flavio; Gómez‑Laich, Agustina; Borger, Luca; Redcliffe, James; Yoda, Ken; Yamamoto, Takashi; Ferreira, Sam; Govender, Danny; Viljoen, Pauli; Bruns, Angela; Bell, Stephen H.; Marks, Nikki J.; Bennett, Nigel Charles; Tonini, Mariano H.; Duarte, Carlos M.; Van Rooyen, Martin C.; Bertelsen, Mads F.; Tambling, Craig J.; Wilson, Rory P. (BioMed Central, 2021-07)
    BACKGROUND: Fine-scale data on animal position are increasingly enabling us to understand the details of animal movement ecology and dead-reckoning, a technique integrating motion sensor-derived information on heading ...
  • Death of endemic Virgilia oroboides trees in South Africa caused by Diaporthe virgiliae sp. nov. 
    Machingambi, N.M.; Dreyer, Leanne Laurette; Oberlander, Kenneth C.; Roets, Francois; Roux, Jolanda (Wiley, 2015-10)
    Numerous dead and dying individuals of the Western Cape endemic tree Virgilia oroboides (Fabaceae) were recently observed within a South African national botanical garden. Root-rot fungi and fungi symbiotic with bark ...
  • Decadal decline in maternal body condition of a Southern Ocean capital breeder 
    Vermeulen, Els; Thavar, Terriann; Glarou, Maria; Ganswindt, Andre; Christiansen, Fredrik (Nature Research, 2023-02-24)
    The changing physical properties of the Southern Ocean are known to impact the recruitment and survival of Antarctic krill (Euphausia superba). For oceanic krill predators, the resulting reduced energy intake may lead to ...
  • Decadal shift in foraging strategy of a migratory southern ocean predator 
    Van den Berg, Gideon Leon; Vermeulen, Els; Valenzuela, Luciano O.; Berube, Martine; Ganswindt, Andre; Grocke, Darren R.; Hall, Grant; Hulva, Pavel; Neveceralova, Petra; Palsboll, Per J.; Carroll, Emma L. (Wiley, 2021-03)
    Rapid anthropogenic environmental change is expected to impact a host of ecological parameters in Southern Ocean ecosystems. Of critical concern are the consequences of these changes on the range of species that show ...
  • A decade of geoinformation sharing at ETH Zurich 
    Iosifescu-Enescu, Ionut; Iosifescu-Enescu, Christina; Pachaud, Nadia H.; Tsorlini, Angeliki; Hurni, Lorenz; Coetzee, Serena Martha; Cooper, A.K. (Antony Kyle); Camboim, Silvana; Anand, Suchith; Taylor, Trevor; Borba, R.L.R. (Rogerio); Strauch, Julia (International Cartographic Association (ICA), 2015)
    Paper presented at the 27th International Cartographic Conference: Spatial data infrastructures, standards, open source and open data for geospatial (SDI-Open 2015) 20-21 August 2015, Brazilian Institute of Geography and ...
  • A decade of ubiquicidin development for PET imaging of infection : a systematic review 
    Marjanovic-Painter, Biljana; Kleynhans, Janke; Zeevaart, Jan Rijn; Rohwer, Egmont Richard; Ebenhan, Thomas (Elsevier, 2023-01)
    BACKGROUND : Ubiquicidin is a peptide fragment with selective binding to negatively charged bacterial cell membranes. Besides its earlier labelling with gamma emitting radionuclides, it has been labelled with Positron ...
  • Decentralised wastewater treatment effluent fertigationm : preliminary technical assessment 
    Musazura, W.; Odindo, A.O.; Tesfamariam, Eyob Habte; Hughes, J.C.; Buckley, C.A. (Water Research Commission, 2018)
    The Decentralised Wastewater Treatment System (DEWATS) can provide a potential sanitation solution to residents living in informal settlements with the effluent produced being used on agricultural land. This paper reports ...
  • Decentralization : toward a revitalized strategy for rural development 
    Parker, Andrew N.; Kirsten, Johann F. (Agricultural Economics Association of South Africa, 1995-12)
    Despite recognition of the need for special strategies to address the widespread incidence of rural poverty in developing countries, initiatives aimed at bringing about a transformation of the rural standard of living have ...
  • Deciphering the cryptic genome : genome-wide analyses of the rice pathogen Fusarium fujikuroi reveal complex regulation of secondary metabolism and novel metabolites 
    Wiemann, Philipp; Sieber, Christian M.K.; Von Bargen, Katharina W.; Studt, Lena; Niehaus, Eva-Maria; Espino, Jose J.; Huß, Kathleen; Michielse, Caroline B.; Albermann, Sabine; Wagner, Dominik; Bergner, Sonja V.; Connolly, Lanelle R.; Fischer, Andreas; Reuter, Gunter; Kleigrewe, Karin; Bald, Till; Wingfield, Brenda D.; Ophir, Ron; Freeman, Stanley; Hippler, Michael; Smith, Kristina M.; Brown, Daren W.; Proctor, Robert H.; Munsterkotter, Martin; Freitag, Michael; Humpf, Hans-Ulrich; Guldener, Ulrich; Tudzynski, Bettina (Public Library of Science, 2013-06-27)
    The fungus Fusarium fujikuroi causes ‘‘bakanae’’ disease of rice due to its ability to produce gibberellins (GAs), but it is also known for producing harmful mycotoxins. However, the genetic capacity for the whole arsenal ...
  • Deciphering the structural, textural, and electrochemical properties of activated BN-doped spherical carbons 
    Mutuma, B.K. (Bridget); Boitumelo J. Matsoso; Momodu, Damilola Y.; Oyedotun, Kabir Oyeniran; Coville, Neil J.; Manyala, Ncholu I. (MDPI Publishing, 2019-03-16)
    In this study, the effect of K2CO3 activation on the structural, textural, and electrochemical properties of carbon spheres (CSs) and boron and nitrogen co-doped carbon spheres (BN-CSs) was evaluated. Activation of the ...
  • Decision rules for determining terrestrial movement and the consequences for filtering high-resolution global positioning system tracks : a case study using the African lion (Panthera leo) 
    Gunner, Richard M.; Wilson, Rory P.; Holton, Mark D.; Hopkins, Phil; Bell, Stephen H.; Marks, Nikki J.; Bennett, Nigel Charles; Ferreira, Sam M.; Govender, Danny; Viljoen, Pauli; Bruns, Angela; Van Schalkwyk, Ockert Louis; Bertelsen, Mads F.; Duarte, Carlos M.; Van Rooyen, Martin C.; Tambling, Craig; Goppert, Aoife; Diesel, Delmar; Scantlebury, D. Michael (Royal Society, 2022-01)
    The combined use of global positioning system (GPS) technology and motion sensors within the discipline of movement ecology has increased over recent years. This is particularly the case for instrumented wildlife, with ...
  • A decision support system that considers risk and site specificity in the assessment of irrigation water quality (IrrigWQ) 
    Du Plessis, H.M.; Annandale, J.G. (John George), 1959-; Benad, Nico (MDPI, 2023-11-23)
    Irrigators are increasingly challenged to maintain or even increase production using less water, sometimes of poorer quality, and often from unconventional sources. This paper describes the main features of a newly ...
  • Decision-making in agriculture : a farm-level modelling approach 
    Strauss, P.G. (Petrus Gerhardus) (University of Pretoria, 2006-09-13)
    In the past decade South Africa experienced major political and economic changes. In addition to these major changes, South Africa is a highly diverse country and a country of extremes in many respects. Within this dynamic ...
  • Decline and fall : the causes of group failure in cooperatively breeding meerkats 
    Duncan, Chris; Manser, Marta B.; Clutton-Brock, Tim H. (Wiley Open Access, 2021-11)
    In many social vertebrates, variation in group persistence exerts an important effect on individual fitness and population demography. However, few studies have been able to investigate the failure of groups or the causes ...
  • Decline of birds in a human modified coastal dune forest landscape in South Africa 
    Trimble, Morgan Jayne; Van Aarde, Rudi J. (Public Library of Science, 2011-01)
    Previous studies demonstrate that old-growth forest remnants and vegetation regenerating after anthropogenic disturbance provide habitat for birds in a human modified coastal dune forest landscape in northern KwaZulu-Na ...
  • Declining citation accuracy in polar research 
    McIntyre, T.; Haussmann, N.S. (Natalie) (Cambridge University Press, 2021)
    Accurate citation practices are important to ensure a robust knowledge base and overall trustworthy academic enterprise. The prevalence of poor citation practices has been assessed in multiple fields, resulting in estimates ...