Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Napo Ntsasa"'
Autor:
Andile Mkhohlakali, Tien-Chien Jen, Kabelo Ledwaba, Sivuyisiwe Mapukata, Happy Mothepane Mabowa, Mokgehle R. Letsoalo, Napo Ntsasa, James Tshilongo
Publikováno v:
Frontiers in Chemical Engineering, Vol 6 (2024)
In this study, Titanium dioxide (TiO2) nano-powder was prepared using a sol-gel process with and without surfactant. A typical non-ionic surfactant (Triton X-100) was used during the process. The phase compositions of TiO2 and surfactant-assisted TiO
Externí odkaz:
https://doaj.org/article/2b316e0dbb2f4263a0ab1711875040e6
Autor:
Nehemiah Mukwevho, Napo Ntsasa, Andile Mkhohlakali, Mothepane Happy Mabowa, Luke Chimuka, James Tshilongo, Mokgehle Refiloe Letsoalo
Publikováno v:
Water, Vol 16, Iss 17, p 2485 (2024)
Abstract: The increasing population has subjected rivers and streams to high levels of both industrial and domestic pollution. Significant environmental challenges have been brought about by their effects, particularly with regard to biota, ecosystem
Externí odkaz:
https://doaj.org/article/9dc6e1220216456fa93662aaffc65506
Publikováno v:
Journal of Soil Science and Plant Nutrition. 21:2873-2883
There are few studies that have assessed greenhouse gas (GHG) effluxes under dryland agriculture, especially in South Africa. Subsequently, limited data in the sub-Saharan region impedes the formulation of policies on GHG mitigation and adaptation. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d486aa9c698ad9ac2c0dfdc6a3e33b88
https://doi.org/10.1007/s42729-021-00574-1
https://doi.org/10.1007/s42729-021-00574-1
Autor:
O. Muzi Ndwandwe, Napo Ntsasa, S.S. Nkosi, Nompumelelo Leshabane, David E. Motaung, Silindile Lushozi, James Tshilongo, Ioannis Kortidis
Publikováno v:
Ceramics International. 45:16417-16423
We report on the propanol vapour (C3H8O) gas sensing characteristics of ZnO nanostructures prepared via hydrothermal assisted method. The ZnO-4h sensor showed a high response (i.e. resistance ratio), sensitivity and selectivity toward C3H8O gas at lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f853b0fad72ca4072eb8273d4ccef43
https://doi.org/10.1016/j.ceramint.2019.05.172
https://doi.org/10.1016/j.ceramint.2019.05.172
Autor:
David E. Motaung, Thomas Moyo, Ioannis Kortidis, S.S. Nkosi, Napo Ntsasa, Ongezwa Mnethu, Robin E. Kroon, James Tshilongo, Hendrik C. Swart
Publikováno v:
Journal of colloid and interface science. 576
p-xylene is a harmful volatile organic compound that needs to be tested for indoor air quality detection. We report on the sensing characteristics of CuO and Zn doped CuO nanoplatelets of various concentrations that were prepared by hydrothermal synt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43d19045c64e851e4e4ee8ff71773576
https://pubmed.ncbi.nlm.nih.gov/32460099
https://pubmed.ncbi.nlm.nih.gov/32460099
Autor:
Christina E Cecelski, George C Rhoderick, Antonio M Possolo, Jennifer Carney, Miroslav Vokoun, Jitka Privoznikova, Sangil Lee, Ji Hwan Kang, Yong Doo Kim, Dal Ho Kim, Tatiana Macé, Christophe Sutour, Céline Pascale, Napo Ntsasa, James Tshilongo, Mudalo Jozela, Nompumelelo Leshabane, Goitsemang Lekoto, David R Worton, Paul J Brewer, Fred Farrow-Dunn, Sergi Moreno, Klaus Wirtz, Volker Stummer, L A Konopelko, A V Kolobova, Y A Kustikov, A Y Klimov, O V Efremova, Janneke I T van Wijk, Adriaan M H van der Veen
Publikováno v:
Metrologia. 59:08003
Main text The CCQM-K10.2018 comparison aimed to evaluate the capabilities of national metrology institutes (NMIs) to prepare and/or value assign primary reference mixtures containing benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene (su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d84953621a5cecfa1c12c4f71327d8ae
https://doi.org/10.1088/0026-1394/59/1a/08003
https://doi.org/10.1088/0026-1394/59/1a/08003
Autor:
James Tshilongo, Y. D. Kim, D Wang, D. H. Kim, G. A. Lekoto, J. H. Kang, Sungjun Lee, P. Seemane, Mudalo Jozela, Nompumelelo Leshabane, Napo Ntsasa, B. Zhe
Publikováno v:
Metrologia. 58:08009
Main text Hazardous air pollutants (HAPs) are toxic air pollutants that are mainly emitted from man-made sources such as chemical processes, automobiles, power plants, and refineries, building materials, and cleaning solvents. Some HAPs are emitted f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::272eeac73ee7358f714c3ebb70b1431b
https://doi.org/10.1088/0026-1394/58/1a/08009
https://doi.org/10.1088/0026-1394/58/1a/08009
Autor:
Shinji Uehara, James Tshilongo, D Akima, Napo Ntsasa, B. Zhe, D Wang, Mudalo Jozela, Y. D. Kim, Sungjun Lee, Nompumelelo Leshabane, N Onozawa, J. H. Kang, D. H. Kim
Publikováno v:
Metrologia. 57:08020
Benzene, toluene, ethylbenzene, o-xylene, m-xylene, and styrene (subsequently referred to gas BTEX) are volatile organic compounds emitted from gasoline, fossil fuel combustion, paints, rubber products, and adhesives. Exposure to BTEX can make advers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0828e299c3da405ccb69c25583d970e
https://doi.org/10.1088/0026-1394/57/1a/08020
https://doi.org/10.1088/0026-1394/57/1a/08020
Autor:
Paul J. Brewer, Michela Sega, Tamás Büki, Robert Wielgosz, Adriaan M H van der Veen, Prabha Johri, Leonid Konopelko, E T Zalewska, James Tshilongo, Nompumelelo Leshabane, Yan Chubchenko, Faraz Idrees, Judit Fükő, George C. Rhoderick, Napo Ntsasa, Dariusz Cieciora, Y A Kustikov, Tatiana Macé, B. Zhe, Tiphaine Choteau, Mudalo Jozela, Walter R. Miller, Edgar Flores, Nobuyuki Aoki, Joële Viallon, Joseph T. Hodge, Tanil Tarhan, A V Kolobova, Zeyi Zhou, O V Efremova, Brad Hall, Gerard Nieuwenkamp, Jeongsoon Lee, Philippe Moussay, Zsófia Nagyné Szilágyi, Takuya Shimosaka
Publikováno v:
Metrologia. 56:08001
CCQM-K120.a comparison involves preparing standards of carbon dioxide in air which are fit for purpose for the atmospheric monitoring community, with stringent requirements on matrix composition and measurement uncertainty of the CO2 mole fraction. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f1d1c1afe8afeb0bf6865d07d55c03f
https://doi.org/10.1088/0026-1394/56/1a/08001
https://doi.org/10.1088/0026-1394/56/1a/08001
Autor:
Joseph T. Hodges, James E Norris, Faraz Idrees, Joële Viallon, Napo Ntsasa, Philippe Moussay, James Tshilongo, Gumani E Mphaphuli, Robert Wielgosz
Publikováno v:
Metrologia. 55:08001
As part of the on-going key comparison BIPM.QM-K1, a comparison has been performed between the ozone national standard of South Africa maintained by the National Metrology Institute of South Africa (NMISA) and the common reference standard of the key
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a95576a2007d06afae343dc74579a2b
https://doi.org/10.1088/0026-1394/55/1a/08001
https://doi.org/10.1088/0026-1394/55/1a/08001