Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Kefa Karimu Onchoke"'
Autor:
Emily E. Dowdy, Kefa Karimu Onchoke
Publikováno v:
World Journal of Chemical Education. 9:46-49
Introductory chemistry courses are normally designed for different students in colleges and universities. In many cases the Introductory Chemistry course is offered to students to satisfy a general science prerequisite and in other courses. At Stephe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e8ce16fc80cc46e0254dce5e1e7227c
https://doi.org/10.12691/wjce-9-2-2
https://doi.org/10.12691/wjce-9-2-2
Publikováno v:
Analytical Chemistry Letters. 9:128-142
The electrochemical behavior of benzanthrone (BA), a known mutagen and carcinogen, and an environmental pollutant widely found in aerosol particulates, was studied on a platinum electrode using cyc...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::defca2c92c91285ce8aa254366a195de
https://doi.org/10.1080/22297928.2019.1613926
https://doi.org/10.1080/22297928.2019.1613926
Autor:
Robert R. Friedfeld, Pressley S. Nicholson, Leslie G. Cecil, Kefa Karimu Onchoke, Josephine Taylor
Publikováno v:
Data in Brief, Vol 35, Iss, Pp 106886-(2021)
Data in Brief
Data in Brief
In this data article, we present the spectroscopic structural data of the pottery samples collected from Peten Itza, Guatemala. Detailed Fourier transmission infrared, powder X-ray diffraction, scanning electron microscopy coupled to electron dispers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb04beda4b5d93665fda5c2e149e7202
http://www.sciencedirect.com/science/article/pii/S2352340921001700
http://www.sciencedirect.com/science/article/pii/S2352340921001700
Autor:
Kefa Karimu Onchoke
Publikováno v:
Results in Chemistry, Vol 3, Iss, Pp 100099-(2021)
Nitrated benzo[a]pyrenes are known to be mutagenic, carcinogenic and teratogenic to bacterial and animal cells. For differentiation of isomers and environmental analytical trace studies, spectroscopic information is necessary. The present studies rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::335f16b762d2908e38443aa8d24da267
http://www.sciencedirect.com/science/article/pii/S2211715621000047
http://www.sciencedirect.com/science/article/pii/S2211715621000047
Publikováno v:
Data in Brief
Data in Brief, Vol 20, Iss, Pp 880-888 (2018)
Data in Brief, Vol 20, Iss, Pp 880-888 (2018)
The data presented in this article is related to the research article entitled, “Structural Characterization and Evaluation of Municipal Wastewater Sludge (Biosolids) from two Rural Wastewater Treatment Plants in East Texas, USA” (Onchoke et al.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d9e4e412eceacc8c74239a6b3140dc1
https://doi.org/10.1016/j.dib.2018.08.087
https://doi.org/10.1016/j.dib.2018.08.087
Publikováno v:
Compost Science & Utilization. 26:244-255
The potential risk of increased metal concentrations through the application of composted wastewater sludge (CWS) is of concern. In particular, the high affinity of composted wastewater sludge for metals such as Pb, may influence the extent of metal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d14856d3aea2e9c5f8fee8e6897131bd
https://doi.org/10.1080/1065657x.2018.1496044
https://doi.org/10.1080/1065657x.2018.1496044
Autor:
Kefa Karimu Onchoke, Jorge J. Ojeda
Publikováno v:
The Texas Journal of Science. 71
Three mono-nitrobenzanthrone isomers (1-, 2-, and 3-nitrobenzanthrone; 1-, 2-, and 3-NBA) were synthesized by reacting benzanthrone (BA) with nitric acid (HNO3) in acetic anhydride at ice-cold conditions. The major product, 2-nitrobenzanthrone (2-NBA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0d5ea51de3fa66024d1c2aeb1a8c556
https://doi.org/10.32011/txjsci_71_1_article9
https://doi.org/10.32011/txjsci_71_1_article9
Autor:
Leslie G. Cecil, Kefa Karimu Onchoke, Robert Friedfeld, Wayne P. Weatherford, Josephine Taylor, Pressley S. Nicholson
Publikováno v:
Journal of Archaeological Science: Reports. 36:102767
Maya pottery samples collected from various sites in Guatemala were investigated for their elemental composition, mineral crystalline phases, particle size, and thermogravimetric properties. The samples were analyzed by using scanning electron micros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0015e8ac6e2df9128e5620d93052cf6f
https://doi.org/10.1016/j.jasrep.2020.102767
https://doi.org/10.1016/j.jasrep.2020.102767
Publikováno v:
Results in Chemistry, Vol 3, Iss, Pp 100211-(2021)
Biosolids (also known as sludge) are nutrient-rich materials used as soil amendments. A modified Tessier sequential extraction protocol was utilized for speciation and bioavailability of metals in samples from Nacogdoches and Lufkin wastewater sludge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bf9e28be8809956e43c9f24cc558ec7
https://doi.org/10.1016/j.rechem.2021.100211
https://doi.org/10.1016/j.rechem.2021.100211
Publikováno v:
Advances in Environmental Chemistry. 2016:1-10
The concentration of hexavalent chromium (Cr(VI)), a toxic environmental pollutant and carcinogen, was determined in samples collected from Nacogdoches Wastewater Treatment Plant (NWWTP) using ion chromatography and UV-visible spectrophotometry (IC,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::664d530dd025f430bf66a32f4065a687
https://doi.org/10.1155/2016/3468635
https://doi.org/10.1155/2016/3468635