Browsing Natural and Agricultural Sciences by Title

Browsing Natural and Agricultural Sciences by Title

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  • Verbrokkeling van grond met behulp van vibrasies 
    Venter, Gerhardus (University of Pretoria, 1968)
    No abstract available
  • Verdelingsvrye toetsingsmetodes vir die probleem van twee of meer steekproewe (Afrikaans) 
    Lemmer, Hermanus Hofmeyr (University of Pretoria, 1964)
    Please read the abstract in the thesis
  • The Verification of different model configurations of the Unified Atmospheric Model over South Africa 
    Mahlobo, Dawn Duduzile (University of Pretoria, 2013)
    In 2006 a Numerical Weather Prediction (NWP) model known as the Unified Model (UM) from the United Kingdom Meteorological Office (UK Met Office) was installed at the South African Weather Service (SAWS). Since then it ...
  • Verification of numerical weather predictions for the western Sahel by the United Kingdom Met Office Limited area model over Africa 
    Idowu, Oluseun Samuel (University of Pretoria, 2009-09-15)
    Numerical Weather Predictions (NWPs) are subject to systematic errors and biases. Hence, the continuous verification of NWP model outputs in order to contribute to model improvement became very important over recent years. ...
  • Verification of radiative transfer schemes for the EHT 
    Gold, Roman; Broderick, Avery E.; Younsi, Ziri; Fromm, Christian M.; Gammi, Charles F.; Mościbrodzka, Monika; Pu, Hung-Yi; Bronzwaer, Thomas; Davelaar, Jordy; Dexter, Jason; Ball, David; Chan, Chi-kwan; Kawashima, Tomohisa; Mizuno, Yosuke; Ripperda, Bart; Ripperda, Bart; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Balokovic, Mislav; Barrett, John; Bintley, Dan; Blackburn, Lindy; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen, Yongjun; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crew, Geoffrey B.; Cui, Yuzhu; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Fish, Vincent L.; Fomalont, Ed; Fraga-Encinas, Raquel; Freeman, Bill; Friberg, Per; Gómez, Jose L.; Galison, Peter; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Keating, Garrett K.; Kettenis, Mark; Kim, Jae-Young; Kim, Junhan; Kim, Jongsoo; Kino, Motoki; Koay, Jun Yi; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lauer, Tod R.; Sang-Sung., Lee; Li, Yan-Rong; Li, Zhiyuan; Lico, Rocco; Lindqvist, Michael; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent Loinard; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Markoff, Sera; Mao, Jirong; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Moran, James M.; Moriyama, Kotaro; Nagai, Hiroshi; Nakamura, Masanori; Nagar, Neil M.; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Okino, Hiroki; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Ozel, Feryal; Palumbo, Daniel C.M.; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Plambeck, Richard; Piétu, Vincent; PopStefanija, Aleksandar; Porth, Oliver; Preciado-Lopez, Jorge A.; Psaltis, Dimitrios; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L.J.; Sánchez, Salvador; Sánchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schuster, Karl-Friedrich; Schloerb, F. Peter; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Tiede, Paul; Tazaki, Fumie; Tilanus, Remo P.J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Thalia; Trippe, Sascha; Tsuda, Shuichiro; Van Langevelde, Huib Jan; Van Bemmel, Ilse; Van Rossum, Daniel R.; Wagner, Jan; Wardle, John; Wex, Norbert; Weintroub, Jonathan; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, Ken; Young, Andre; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guangyao; Zhao, Shan-Shan; Zhu, Ziyan (American Astronomical Society, 2020-07)
    The Event Horizon Telescope (EHT) Collaboration has recently produced the first resolved images of the central supermassive black hole in the giant elliptical galaxy M87. Here we report on tests of the consistency and ...
  • Verification of South African Weather Service operational seasonal forecasts 
    Moatshe, Peggy Seanokeng (University of Pretoria, 2008)
    The South African Weather Service rainfall seasonal forecasts are verified for the period of January-February-March to October-November-December 1998-2004. These forecasts are compiled using different models from different ...
  • Verification of the ADMS 4 Air Quality Model in determining the SO2 dispersion during the 2006 and 2007 winter over Elandsfontein, South Africa 
    Ras, Marthinus Dewald Retief (University of Pretoria, 2013-01-10)
    ADMS 4 is a relatively new generation air quality dispersion model program written by Cambridge Environmental Research Consultants in the UK and used to verify datasets in the USA on several types of plants, in various ...
  • Verifying the ground treatment as proposed by the Secondary Permeability Index during dam foundation grouting 
    Jones, Brendon Ronald; Van Rooy, J.L. (Jan Louis); Mouton, Dawid J. (Springer, 2019-04)
    The Secondary Permeability Index (SPI) is a permeability-based rock mass classification, which when complemented with the degree of jointing can be employed as an approximation to the ground treatment design. However, when ...
  • Veronica plants-drifting from farm to traditional healing, food application, and phytopharmacology 
    Salehi, Bahare; Shetty, Mangalpady Shivaprasad; Kumar, Nanjangud V. Anil; Zivkovic, Jelena; Calina, Daniela; Docea, Anca Oana; Emamzadeh-Yazdi, Simin; Kılıç, Ceyda Sibel; Goloshvili, Tamar; Nicola, Silvana; Pignata, Giuseppe; Sharopov, Farukh; Del Mar Contreras, María; Cho, William C.; Martins, Natalia; Sharifi-Rad, Javad (MDPI, 2019-07)
    The Veronica genus, with more than 200 species, belongs to the Plantaginaceae family and is distributed over most of the Northern Hemisphere and in many parts of Southern Hemisphere. These plants are traditionally used in ...
  • Versatile silicone rubber samplers for trace organic analysis in a chromatography-mass spectrometry laboratory 
    Naude, Yvette (University of Pretoria, 2013)
    Extraction is required to separate and concentrate trace level analytes from the sample matrix prior to gas chromatography (GC). Classical extraction procedures utilise large amounts of hazardous solvents, generate waste, ...
  • Verslag bevestig dat kos se prys aansienlik gestyg het 
    Kirsten, Johann F.; Brand, Nellie (Beeld, 2006-07-19)
  • Verticillium wilt of potato in South Africa 
    Millard, Cornelia Philipina (University of Pretoria, 2005-07-05)
    Since the first report of Verticillium wilt of potato in 1950, the disease has been considered to be of minor importance in South Africa. Between 1995 and 2000, however, Verticillium spp. were isolated from 146 samples of ...
  • Verwerkte stapelkos duurder 
    Kirsten, Johann F.; Duvenhage, Hennie (Rapport, 2003-09-28)
  • The viability assessment of Microcystis aeruginosa cells after co-culturing with Bacillus mycoides B16 using flow cytometry 
    Gumbo, Jabulani Ray; Cloete, T.E. (Thomas Eugene), 1958-; Van Zyl, G.J.J.; Sommerville, Jaqui E.M. (Elsevier, 2014)
    Microcystis aeruginosa is the dominate cyanobacteria in freshwater bodies causing proliferation of toxic harmful algal blooms (HABs), worldwide. Thus a biological control method based on predatory bacteria is an alternative ...
  • Viability of leopards Panthera pardus (Linnaeus, 1758) in South Africa 
    Swanepoel, Lourens Hendrik (2013)
    Leopards Panthera pardus are highly adaptable large felids that persist in un-protected areas throughout South Africa. However, leopards are frequently involved in conflict with land users and subsequently killed in ...
  • The viability of the Kalplats Platinum Group Element deposit 
    Carroll, Sandy (University of Pretoria, 2008-07-15)
    The Kalplats platinum group metal deposit is located in the Northwestern Province of South Africa, 80 km southwest of Mafikeng, in the Stella Layered Intrusion. The Stella Layered Intrusion intruded into the Kraaipan ...
  • Viability reagent, prestoblue, in comparison with other available reagents, utilized in cytotoxicity and antimicrobial assays 
    Lall, Namrita; Henley-Smith, Cynthia Joan; De Canha, Marco Nuno; Oosthuizen, Carel Basson; Berrington, Danielle (Hindawi Publishing Corporation, 2013)
    This study compared different commercially available viability reagents. The growth indicator reagents include p-iodonitrotetrazolium violet (INT), PrestoBlue, and Alamar Blue which were used for antimicrobial analysis ...
  • Viability, from a quality perspective on the reuse of wastewater effluents in the Southern Gauteng region, South Africa 
    Skosana, Gugulethu Given (University of Pretoria, 2016)
    Growing populations, urbanization, environmental awareness with resultant regulations and water scarcity have resulted in a search for alternative water sources. Municipal wastewater reclamation and reuse is a necessity ...
  • Vibration of a Reissner-Mindlin-Timoshenko plate-beam system 
    Labuschagne, A.; Van Rensburg, N.F.J.; Van der Merwe, A.J. (Elsevier, 2009)
    In this paper, we consider a plate-beam system in which the Reissner-Mindlin plate model is combined with the Timoshenko beam model. Natural frequencies and vibration modes for the system are calculated using the finite ...
  • Vibrational and electronic states of sapphire and wurtzite ZnO 
    Machatine, Augusto Gonçalo Jose (University of Pretoria, 2010-09-23)
    No abstract available.