Browsing Natural and Agricultural Sciences by Title

Browsing Natural and Agricultural Sciences by Title

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  • Universal algebraic methods for non-classical logics 
    Raftery, James G. (Springer, 2022)
    This expository article is a compilation of universal algebraic prerequisites and tools for the analysis of non-classical logics, with particular (but not exclusive) reference to substructural logics.
  • Universal DNA methylation age across mammalian tissues 
    Lu, A.T.; Fei, Z.; Haghani, A.; Robeck, T.R.; Zoller, J.A.; Li, C.Z.; Lowe, R.; Yan, Q.; Zhang, J.; Vu, H.; Ablaeva, J.; Acosta-Rodriguez, V.A.; Adams, D.M.; Almunia, J.; Aloysius, A.; Ardehali, R.; Arneson, A.; Baker, C.S.; Banks, G.; Belov, K.; Bennett, Nigel Charles; Black, P.; Blumstein, D.T.; Bors, E.K.; Breeze, C.E.; Brooke, R.T.; Brown, J.L.; Carter, G.G.; Caulton, A.; Cavin, J.M.; Chakrabarti, L.; Chatzistamou, I.; Chen, H.; Cheng, K.; Chiavellini, P.; Choi, O.W.; Clarke, S.M.; Cooper, L.N.; Cossette, M.L.; Day, J.; DeYoung, J.; DiRocco, S.; Dold, C.; Ehmke, E.E.; Emmons, C.K.; Emmrich, S.; Erbay, E.; Erlacher-Reid, C.; Faulkes, C.G.; Ferguson, S.H.; Finno, C.J.; Flower, J.E.; Gaillard, J.M.; Garde, E.; Gerber, L.; Gladyshev, V.N.; Gorbunova, V.; Goya, R.G.; Grant, M.J.; Green, C.B.; Hales, E.N.; Hanson, M.B.; Hart, Daniel William; Haulena, M.; Herrick, K.; Hogan, A.N.; Hogg, C.J.; Hore, T.A.; Huang, T.; Izpisua Belmonte, J.C.; Jasinska, A.J.; Jones, G.; Jourdain, E.; Kashpur, O.; Katcher, H.; Katsumata, E.; Kaza, V.; Kiaris, H.; Kobor, M.S.; Kordowitzki, P.; Koski, W.R.; Kruetzen, M.; Kwon, S.B.; Larison, B.; Lee, S.G.; Lehmann, M.; Lemaitre, J.F.; Levine, A.J.; Li, C.Z.; Li, X.; Lim, A.R.; Lin, D.T.S.; Lindemann, D.M.; Little, T.J.; Macoretta, N.; Maddox, D.; Matkin, C.O.; Mattison, J.A.; McClure, M.; Mergl, J.; Meudt, J.J.; Montano, G.A.; Mozhui, K.; Munshi-South, J.; Naderi, A.; Nagy, M.; Narayan, P.; Nathanielsz, P.W.; Nguyen, N.B.; Niehrs, C.; O'Brien, J.K.; O'Tierney Ginn, P.; Odom, D.T.; Ophir, A.G.; Osborn, S.; Ostrander, E.A.; Parsons, K.M.; Paul, K.C.; Pellegrini, M.; Peters, K.J.; Pedersen, A.B.; Petersen, J.L.; Pietersen, D.W.; Pinho, G.M.; Plassais, J.; Poganik, J.R.; Prado, N.A.; Reddy, P.; Rey, B.; Ritz, B.R.; Robbins, J.; Rodriguez, M.; Russell, J.; Rydkina, E.; Sailer, L.L.; Salmon, A.B.; Sanghavi, A.; Schachtschneider, K.M.; Schmitt, D.; Schmitt, T.; Schomacher, L.; Schook, L.B.; Sears, K.E.; Seifert, A.W.; Seluanov, A.; Shafer, A.B.A.; Shanmuganayagam, D.; Shindyapina, A.V.; Simmons, M.; Singh, K.; Sinha, I.; Slone, J.; Snell, R.G.; Soltanmaohammadi, E.; Spangler, M.L.; Spriggs, M.C.; Staggs, L.; Stedman, N.; Steinman, K.J.; Stewart, D.T.; Sugrue, V.J.; Szladovits, B.; Takahashi, J.S.; Takasugi, M.; Teeling, E.C.; Thompson, M.J.; Van Bonn, B.; Vernes, S.C.; Villar, D.; Vinters, H.V.; Wallingford, M.C.; Wang, N.; Wayne, R.K.; Wilkinson, G.S.; Williams, C.K.; Williams, R.W.; Yang, X.W.; Yao, M.; Young, B.G.; Zhang, B.; Zhang, Z.; Zhao, P.; Zhao, Y.; Zhou, W.; Zimmermann, J.; Ernst, J.; Raj, K.; Horvath, S. (Nature Research, 2023-11)
    Aging, often considered a result of random cellular damage, can be accurately estimated using DNA methylation profiles, the foundation of pan-tissue epigenetic clocks. Here, we demonstrate the development of universal ...
  • Universal H-colourable graphs 
    Broere, Izak; Heidema, Johannes (Springer, 2013)
    Rado constructed a (simple) denumerable graph R with the positive integers as vertex set with the following edges: for given m and n with m < n, m is adjacent to n if n has a 1 in the mth position of its binary expansion. ...
  • Universal problem for Kähler differentials in A-modules : non-commutative and commutative cases 
    Abel, M.; Ntumba, Patrice P. (Springer, 2014-08)
    Let A be an associative and unital K-algebra sheaf, where K is a commutative ring sheaf, and ε an (A, A)-bimodule, that is, a sheaf of (A, A)-bimodules. We construct an (A, A)-bimodulc which is K-isomorphic with the K-module ...
  • Universality for and in induced-hereditary graph properties 
    Broere, Izak; Heidema, Johannes (2013)
    The well-known Rado graph R is universal in the set of all countable graphs I, since every countable graph is an induced subgraph of R. We study universality in I and, using R, show the existence of 20 pairwise non-isomorphic ...
  • Universality in graph properties allowing constrained growth 
    Broere, Izak; Heidema, Johannes (Elsevier, 2020)
    A graph property is a class of graphs which is closed under isomorphisms. Some properties are also closed under one or more specified constructions that extend any graph into a supergraph containing the original graph as ...
  • The universe in perspective 
    Boeyens, Jan Christoffel Antonie (University of Toronto Press, 2010-06)
    Gödel’s rotating-universe solution of Einstein’s gravitational field equations is interpreted in real projective space. The compass of inertia is shown to coincide with the involuted geodesic of the closed manifold and ...
  • Universities in a time of change 
    Chetty, Nithaya (Academy of Science of South Africa, 2009-10)
    A casual glance at universities around the world quickly reveals that they are actually not at all as universal as the term ‘university’ might imply, as universities show enormous differences in ethos, standards, cultures, ...
  • University level genetics students’ competencies in selected science process skills 
    Aldous, Colleen Michelle (University of Pretoria, 2007-02-09)
    Science process skills are essential for all practicing scientists. These skills include various practices that are needed to glean new knowledge as well as to represent existing knowledge. For example, an ability to use ...
  • University of Pretoria announces Mandela Rhodes Scholarship recipients 
    Nkosi, Phindiwe; Odendaal, Kotie; University of Pretoria (University of Pretoria, 2009-01-27)
    Two students of the University of Pretoria are among the 28 Mandela Rhodes Scholarship recipients selected from eight African countries namely: Gabon, Kenya, Lesotho, South Africa, Swaziland, Tanzania, Uganda and Zimbabwe.
  • Unlocking the potential : challenges and factors influencing the use of ICTs by smallholder maize farmers in Zimbabwe 
    Nyakudya, Stella; Jambo, Newettie; Madududu, Pamela; Manyise, Timothy (Taylor and Francis, 2024)
    The study aims to investigate the challenges faced by smallholder maize farmers and identify the pivotal factors influencing the adoption of ICTs in agriculture. A blend of descriptive and probit regression analytical ...
  • Unlocking the potential of orphan legumes 
    Kunert, Karl J.; Cullis, Christopher | (Oxford University Press, 2017-04)
    Orphan, or underutilized, legumes are domesticated legumes with useful properties, but with less importance than major world crops due to use and supply constraints. However, they play a significant role in many developing ...
  • Unmanned aerial vehicle (UAV) survey of the Antarctic shag (Leucocarbo bransfieldensis) breeding colony at Harmony Point, Nelson Island, South Shetland Islands 
    Oosthuizen, Wessel Christiaan; Kruger, Lucas; Jouanneau, William; Lowther, Andrew D. (Springer, 2020-02)
    Monitored seabird populations—useful sentinels of marine ecosystem health—have been declining worldwide at a rapid pace. Yet, lack of reliable long-term monitoring data constrains assessment of the conservation status of ...
  • Unmarked individuals in mark-recapture studies : comparisons of marked and unmarked southern elephant seals at Marion Island 
    Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt (Wiley-Blackwell, 2012-08)
    The presence of unmarked individuals is common in mark–recapture study populations; however, their origin and significance in terms of population dynamics remain poorly understood. At Marion Island, southern Indian Ocean, ...
  • Unmasking the invaders : NLR-mal function in plant defense 
    Anbu, Susanna; Swart, Velushka; Van den Berg, Noelani (Frontiers Media, 2023-11-20)
    Plants possess an arsenal of immune receptors to allow for numerous tiers of defense against pathogen attack. These immune receptors can be located either in the nucleocytoplasm or on the plant cell surface. NLR gene ...
  • Unraveling plant cell death during phytophthora infection 
    Midgley, Kayla A.; Van den Berg, Noelani; Swart, Velushka (MDPI, 2022-05-31)
    Oomycetes form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms, of which several hundred organisms are considered among the most devastating plant pathogens— especially members of the genus ...
  • Unraveling the microbial interactions and metabolic potentials in pre- and post-treated sludge from a wastewater treatment plant using metagenomic studies 
    Sidhu, Chandni; Vikram, Surendra; Pinnaka, Anil Kumar (Frontiers Research Foundation, 2017-07-19)
    Sewage waste represents an ecosystem of complex and interactive microbial consortia which proliferate with different kinetics according to their individual genetic as well as metabolic potential. We performed metagenomic ...
  • Unravelling Colletotrichum species associated with Camellia : employing ApMat and GS loci to resolve species in the C. gloeosporioides complex 
    Liu, B.; Weir, B.S.; Damm, U.; Crous, Pedro W.; Wang, Y.; Liu, F.; Wang, M.; Zhang, M.; Cai, L. (Naturalis Biodiversity Center and Centraalbureau voor Schimmelcultures, 2015-02-18)
    We investigated the phylogenetic diversity of 144 Colletotrichum isolates associated with symptomatic and asymptomatic tissues of Camellia sinensis and other Camellia spp. from seven provinces in China (Fujian, Guizhou, ...
  • Unravelling mechanism for detecting chromium on functionalized gold nanoparticles via a smartphone and spectrophotometric-based systems supported by CIEL*a*b* colour space and molecular dynamics 
    Muthwa, Sindisiwe F.; Zulu, Nontuthuko S.; Kistan, Marcel; Onwubu, Stanley C.; Shumbula, Ndivhuwo P.; Moloto, Nosipho; Mpelane, Siyasanga; Hlatshwayo, Thulani Thokozani; Mlambo, Mbuso; Mdluli, Phumlani S. (Elsevier, 2023-02)
    This paper demonstrates the application of smartphones as well as spectrophotometers as tools to demystify the mechanism leading to colour variation of 1,5-diphenylcarbazide functionalized gold nanoparticles (DPC-AuNPs) ...
  • Unravelling Mycosphaerella : do you believe in genera? 
    Crous, Pedro W.; Summerell, Brett A.; Carnegie, Angus J.; Wingfield, Michael J.; Hunter, Gavin Craig; Burgess, Treena I.; Andjic, Vera; Barber, Paul A.; Groenewald, Johannes Zacharias (Nationaal Herbarium Nederland & Centraalbureau voor Schimmelcultures, 2009-10)
    Many fungal genera have been defined based on single characters considered to be informative at the generic level. In addition, many unrelated taxa have been aggregated in genera because they shared apparently similar ...