Browsing Faculty of Natural and Agricultural Sciences by Author "Tiedt, Louwrens R."
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Biosynthesis, electrochemical, antimicrobial and antioxidant studies of silver nanoparticles mediated by talinum triangulare aqueous leaf extract
Elemike, Elias E.; Onwudiwe, Damian C.; Fayemi, Omololoa E.; Ekennia, Anthony C.; Ebenso, Eno E.; Tiedt, Louwrens R. (Springer, 2017)Silver nanoparticles (AgNPs) were synthesized using leaf extract of Talinum triangulare (TT). The nanoparticles were characterised using Infra-red spectroscopy, UV-vis spectroscopy, X-ray diffraction, scanning electron ... -
Characterisation of a topotype and other populations of Hemicriconemoides strictathecatus Esser, 1960 (Nematoda: Criconematidae) from Florida with description of H. phoenicis sp. n. from the USA
Van den Berg, Esther; Tiedt, Louwrens R.; Inserra, Renato N.; Stanley, Jason D.; Vovlas, Nicola (Brill Academic Publishers, 2015)The results of morphological and molecular analyses of a Florida topotype and other populations of Hemicriconemoides strictathecatus showed that this sheathoid nematode consists of two morphotypes, both with an average ... -
Description of Calcaridorylaimus heynsi n. sp. (Nematoda: Dorylaimidae) from Potchefstroom, South Africa
Swart, Antoinette; Fourie, Hendrika; Tiedt, Louwrens R.; Rashidifard, Milad (Brill, 2020)Calcaridorylaimus heynsi n. sp. is the second species of the genus to be described by both morphological and molecular techniques. Morphologically, it can be distinguished from all known species of Calcaridorylaimus by a ... -
Description of Globodera capensis n. sp. (Nematoda: Heteroderidae) from South Africa
Knoetze, Rinus; Swart, Antoinette; Tiedt, Louwrens R. (Brill Academic Publishers, 2013)A new cyst nematode, herein described as Globodera capensis n. sp., was found on several farms in the Swartland and Sandveld areas in South Africa. As the host plant of G. capensis n. sp. is currently unknown, the species ... -
Hairy stalagmites, a new biogenic root speleothem from Botswana
Du Preez, Gerhard C.; Jacobs, Gerhard; Jordaan, Anine; Tiedt, Louwrens R.; Forti, Paolo (Societa Speleologica Italiana, 2015)Ngamiland in northwestern Botswana hosts the Gcwihaba Caves which present unique subterranean environments and host speleothems never before recorded. Cave atmospheric conditions can be extreme with temperatures as high ... -
Influence of the composition of water/ethanol mixtures on the solubility and recrystallization of nevirapine
Stieger, Nicole; Liebenberg, Wilna; Tiedt, Louwrens R.; Wessels, Johanna C.; Caira, Mino R. (ACS, 2010)Anhydrous nevirapine was recrystallized from ethanol containing various amounts of water to determine its effects on the products obtained. The solubility of the anhydrous form was determined for each of the binary solvent ... -
Morphological and molecular characterisation and diagnostics of some species of Scutellonema Andrássy, 1958 (Tylenchida: Hoplolaimidae) with a molecular phylogeny of the genus
Van den Berg, Esther; Tiedt, Louwrens R.; Coyne, Daniel L.; Ploeg, Antoon T.; Navas-Cortés, Juan A. (Brill Academic Publishers, 2013)Scutellonema spp. are widely distributed across tropical and subtropical regions of the world and are associated with numerous agricultural and horticultural crops. Identification of many Scutellonema species is not always ... -
Morphological and molecular characterisation of Criconemoides brevistylus Singh & Khera, 1976 and C. obtusicaudatus Heyns, 1962 from South Africa (Nematoda: Criconematidae) with first description of a male C. obtusicaudatus and proposal of new synonyms
Van den Berg, Esther; Tiedt, Louwrens R.; Subbotin, Sergei A. (Brill Academic Publishers, 2012)During recent collections in South Africa, two species of Criconemoides were found. Criconemoides brevistylus is described and illustrated from a golf course in KwaZulu-Natal Province. It is compared with several closely ... -
Morphological and molecular characterisation of one new and several known species of the reniform nematode, RotylenchulusLinford & Oliveira, 1940 (Hoplolaimidae: Rotylenchulinae), and a phylogeny of the genus
Van den Berg, Esther; Tiedt, Louwrens R.; Palomares-Rius, Juan E.; Vovlas, Nicola; Castillo, Pablo (Brill, 2016)The reniform nematodes of the genus Rotylenchulus are semi-endoparasites of numerous herbaceous and woody plant roots and are mainly distributed in tropical and subtropical regions. In this study, we provide morphological ... -
Morphological and molecular studies on Aphelenchoides arachidis Bos, 1977 (Tylenchina: Aphelenchoididae) from groundnuts in South Africa
Lesufi, Moses M.; McDonald, Alex H.; Tiedt, Louwrens R.; Swart, Antoinette; Knoetze, Rinus; Truter, Mariette (Brill Academic Publishers, 2015)Aphelenchoides arachidis is reported for the first time from South Africa and for the fourth time outside Nigeria. The A. arachidis-infested pods from South Africa showed the following symptoms: small seeds with the testa ... -
The SeDeM expert diagram system: its performance and predictability in direct compressible formulations containing novel excipients and different types of active ingredients
Scholtz, Jacques C.; Steenekamp, Jan H.; Hamman, Josias H.; Tiedt, Louwrens R. (Elsevier, 2017)The SeDeM Expert Diagram System is a galenic pre-formulation system, which evaluates the suitability of excipients and active pharmaceutical ingredients (API's) for direct compression into tablets as well as predicting ... -
Steinernema bertusi n. sp. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from South Africa
Katumanyane, Agil; Tiedt, Louwrens R.; Malan, Antoinette P.; Hurley, Brett P. (Brill, 2020)Two isolates of Steinernema bertusi n. sp. were separately recovered from Tito, Mpumalanga, and Port Edward, Kwa Zulu Natal, South Africa. In this paper, we describe the isolates as a new entomopathogenic nematode (EPN) ...