Browsing Natural and Agricultural Sciences by Title

Browsing Natural and Agricultural Sciences by Title

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  • The neighborhood of the spike gene Is a hotspot for modular intertypic homologous and nonhomologous recombination in coronavirus genomes 
    Nikolaidis, Marios; Markoulatos, Panayotis; Van de Peer, Yves; Oliver, Stephen G.; Amoutzias, Grigorios D. (Oxford University Press, 2022-01)
    Coronaviruses (CoVs) have very large RNA viral genomes with a distinct genomic architecture of core and accessory open reading frames (ORFs). It is of utmost importance to understand their patterns and limits of homologous ...
  • Nemaline myopathy in a six-month-old pomeranian dog 
    Bester, Elizabeth G.; Kitshoff, Adriaan Mynhardt; Botha, W.J.; Van Wilpe, Erna; Du Plessis, Lizette; Williams, J.H. (June Heather) (Medpharm Publications, 2022)
    Nemaline myopathy - a clinically and genetically complex heterogenous group of disorders - is described uncommonly in humans and rarely in animals, and is characterised by progressive muscle weakness. The diagnosis is ...
  • Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production : a case study from South Africa 
    Malherbe, Stephanus; Marais, D. (Diana) (Elsevier, 2015-09)
    Management of the biological component of agricultural soils is a vital aspect of sustainable food production systems. There is a need for soil biology metrics that producers can use as a decision support tool when it ...
  • Neocordana gen. nov., the causal organism of Cordana leaf spot on banana 
    Hernandez-Restrepo, Margarita; Groenewald, Johannes Zacharias; Crous, Pedro W. (Magnolia Press, 2015-04)
    Cordana leaf spot of banana is shown to be associated with several species of a new genus described here as Neocordana gen. nov. Furthermore, Neocordana belongs to Pyriculariaceae (Magnaporthales) rather than Cordanaceae ...
  • Neonatal, infant and child health in South Africa : reflecting on the past towards a better future 
    Goga, Ameena Ebrahim; Feucht, Ute Dagmar; Zar, Heather J.; Vanker, A.; Wiysonge, C.S.; McKerrow, N.; Wright, Caradee Yael; Loveday, M.; Odendaal, Willem A.; Ramokolo, Vundli; Ramraj, Trisha; Bamford, Lesley; Green, Robin J.; Pillay, Yogan; Nannan, N. (Health and Medical Publishing Group, 2019-11)
    Although the neonatal mortality rate in South Africa (SA) has remained stagnant at 12 deaths per 1 000 live births, the infant and under-5 mortality rates have significantly declined since peaking in 2003. Policy changes ...
  • Neonicotinoid insecticides can serve as inadvertent insect contraceptives 
    Straub, Lars; Villamar-Bouza, Laura; Bruckner, Selina; Chantawannakul, Panuwan; Gauthier, Laurent; Khongphinitbunjong, Kitiphong; Retschnig, Gina; Troxler, Aline; Vidondo, Beatriz; Neumann, Peter; Williams, Geoffrey R. (The Royal Society, 2016-05-06)
    There is clear evidence for sublethal effects of neonicotinoid insecticides on non-target ecosystem service-providing insects. However, their possible impact on male insect reproduction is currently unknown, despite the ...
  • Neonicotinoid pesticides can reduce honeybee colony genetic diversity 
    Forfert, Nadege; Troxler, Aline; Retschnig, Gina; Gauthier, Laurent; Straub, Lars; Moritz, Robin F.A.; Neumann, Peter; Williams, Geoffrey R. (Public Library of Science, 2017-10-23)
    Neonicotinoid insecticides can cause a variety of adverse sub-lethal effects in bees. In social species such as the honeybee, Apis mellifera, queens are essential for reproduction and colony functioning. Therefore, any ...
  • Neonicotinoid pesticides severely affect honey bee queens 
    Williams, Geoffrey R.; Troxler, Aline; Retsching, Gina; Roth, Kaspar; Yanez, Orlando; Shutler, Dave; Neumann, Peter; Gauthier, Laurent (Nature Publishing Group, 2015-10-13)
    Queen health is crucial to colony survival of social bees. Recently, queen failure has been proposed to be a major driver of managed honey bee colony losses, yet few data exist concerning effects of environmental stressors ...
  • Neonicotinoids decrease sucrose responsiveness of honey bees at first contact 
    Démares, Fabien J.; Demares, Fabien J.; Pirk, Christian Walter Werner; Nicolson, Sue W.; Human, Hannelie (Elsevier, 2018-07)
    For two decades, neonicotinoid insecticides have been extensively used worldwide. Targeting neuronal receptors, they have deleterious effects on the behaviour and physiology of many insects. Bees are exposed to these ...
  • Neoproterozoic substrate condition vis-à-vis microbial mat structure and its implications : Sonia Sandstone, Rajasthan, India 
    Samanta, P.; Mukhopadhyay, S.; Sarkar, Subir; Eriksson, Patrick George (Elsevier, 2015-07)
    The present study deals with the Neoproterozoic mat-infested substrate sculptured by inferred bioturbations, excellently preserved within the ca. 600 Ma Sonia Sandstone, northwest India. The bioturbations are horizontal, ...
  • Neoproterozoic tsunamiite : upper Bhander sandstone, central India 
    Sarkar, Subir; Bose, Pradip K.; Eriksson, Patrick George (Elsevier BV, 2011-06)
    This paper addresses a distinctive event bedset encased by coastal erg-margin deposits, at a preferred stratigraphic level near the base of the Neoproterozoic Upper Bhander Sandstone in central India. The bedset is composed ...
  • Neotropical termite microbiomes as sources of novel plant cell wall degrading enzymes 
    Victorica, Matias Romero; Soria, Marcelo A.; Batista-Garcia, Ramon Alberto; Ceja-Navarro, Javier A.; Vikram, Surendra; Ortiz, Maximiliano; Ontanon, Ornella; Ghio, Silvina; Martínez-Avila, Liliana; Quintero García, Omar Jasiel; Etcheverry, Clara; Campos, Eleonora; Cowan, Don A.; Arneodo, Joel; Talia, Paola M. (Nature Publishing Group, 2020-03-02)
    In this study, we used shotgun metagenomic sequencing to characterise the microbial metabolic potential for lignocellulose transformation in the gut of two colonies of Argentine higher termite species with different ...
  • Nest architecture as a tool for species discrimination of Hypotrigona species (Hymenoptera: Apidae: Meliponini) 
    Ndungu, Nelly N.; Yusuf, Abdullahi Ahmed; Raina, S.K.; Masiga, D.K.; Pirk, Christian Walter Werner; Nkoba, K. (Entomological Society of Southern Africa, 2019-03)
    Hypotrigona species are difficult to identify morphologically. Here, we show that nest sites and nest architecture can be used to discriminate three Hypotrigona species found in Kenya. Hypotrigona gribodoi, H. araujoi and ...
  • Nest sites selection by sympatric cavity-nesting birds in miombo woodlands 
    Nyirenda, Vincent R.; Chewe, Felistus C.; Chisha-Kasumu, Exildah; Lindsey, Peter Andrew (AOSIS Open Journals, 2016-07-26)
    Deforestation and habitat fragmentation have long been known as drivers of wildlife depletion but information on their specific impacts on cavity-nesting birds in the miombo woodlands has been lacking. A comparative study ...
  • Nested climate modelling over Southern Africa with a semi-langrangian limited area model 
    Engelbrecht, F.A. (Francois Alwyn) (University of Pretoria, 2006-04-07)
    Please read the abstract in the section 00front of this document
  • Nestmate recognition and the role of cuticular hydrocarbons in the African termite raiding ant Pachycondyla analis 
    Yusuf, Abdullahi Ahmed; Pirk, Christian Walter Werner; Crewe, Robin M.; Njagi, Peter G.N.; Gordon, Ian; Torto, Baldwyn (Springer, 2010-04)
    Cuticular hydrocarbons (CHCs) are used for chemical communication among nestmates in many ant species, and they may play a role in the discrimination of nestmates and non-nestmates. Using the mandible opening response ...
  • Net effects of multiple stressors in freshwater ecosystems : a meta-analysis 
    Jackson, Michelle C.; Loewen, Charlie J.G.; Vinebrooke, Rolf D.; Chimimba, Christian Timothy (Wiley, 2016-01)
    The accelerating rate of global change has focused attention on the cumulative impacts of novel and extreme environmental changes (i.e. stressors), especially in marine ecosystems. As integrators of local catchment and ...
  • Net loss of endangered humpback dolphins : integrating residency, site fidelity, and bycatch in shark nets 
    Atkins, Shanan; Cantor, Maurício; Pillay, Neville; Cliff, Geremy; Keith, Mark; Parra, Guido J. (Inter Research, 2016-08)
    Fisheries bycatch—the incidental catch of non-target species during fishing—is problematic for large marine vertebrates. Bather protection programmes that use gillnets to kill sharks cause the incidental mortality of ...
  • Network modelling unravels mechanisms of crosstalk between ethylene and salicylate signalling in potato 
    Ramsak, Živa; Coll, Anna; Stare, Tjaša; Tzfadia, Oren; Baebler, Špela; Van de Peer, Yves; Gruden, Kristina (American Society of Plant Biologists, 2018-09)
    To develop novel crop breeding strategies, it is crucial to understand the mechanisms underlying the interaction between plants and their pathogens. Network modeling represents a powerful tool that can unravel properties ...
  • Network structure indirect losses and financial contagion in inhomogeneous stochastic interbank networks 
    Walters, Nadine Mari (University of Pretoria, 2019)
    We introduce new tiered bank network structures, allowing for many di erent bank sizes, and compare risk propagation in these structures with the well-known Erd˝os-R´enyi, assortative and disassortative structures. The ...