Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Harvi Velásquez"'
Autor:
Yulixis Cano, José Morales, Beatriz Sosa de Borrego, Ligbel Sánchez, Harvi Velásquez, Julio Torres, Brinolfo Montilla
Publikováno v:
Revista Bases de la Ciencia, Vol 2, Iss 1, Pp 1-14 (2017)
En este trabajo se evaluaron las concentraciones de los iones solubles en agua en las partículas inhalables (PM10) usando cromatografía iónica. Para el análisis de Cl-, NO3-, SO42-, PO43-, Na+, K+, Ca2+ y Mg2+ en partículas inhalables colectadas
Externí odkaz:
https://doaj.org/article/5a94d939172946ba90aba4eb8b5af54e
Publikováno v:
Revista Técnica de la Facultad de Ingeniería, Vol 19, Iss 3 (2011)
Véase archivo PDF
Externí odkaz:
https://doaj.org/article/fd0c9b50d7f8487db23d1d2016401a32
Autor:
Harvi Velásquez, José Morales, Brinolfo Montilla, Julio Torres, Ligbel Sánchez, Yulixis Cano, Beatriz Sosa de Borrego
Publikováno v:
Revista Bases de la Ciencia. e-ISSN 2588-0764; Vol. 2 Núm. 1 (2017): Enero-Abril; 1-14
Revista Bases de la Ciencia, Vol 2, Iss 1, Pp 1-14 (2017)
Revista Bases de la Ciencia, Vol 2, Iss 1, Pp 1-14 (2017)
Resumen En este trabajo se evaluaron las concentraciones de los iones solubles en agua en las partículas inhalables (PM10) usando cromatografía iónica. Para el análisis de Cl-, NO3-, SO42-, PO43-, Na+, K+, Ca2+ y Mg2+ en partículas inhalables co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c3f65206513e5d0ed9df1535ff5a7cb
Autor:
Harvi Velásquez, Yulixis Cano, Denis Portillo, Elsa Socorro, Ángel Morillo, Beatriz Sosa de Borrego, Marlene González de Nava, Ana Albornoz, José Morales, Ligbel Sánchez
Publikováno v:
Water, Air, and Soil Pollution. 130:511-516
Nutrient content and pH of rain samples collected at nine sites during 1988-1996 were studied to determine the amounts of N, P and S added by precipitation over Maracaibo Lake basin. The basin is a wide depression occupied by Lake Maracaibo and exten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba82ee9f04525ba6dd445339c2825ee6
https://doi.org/10.1023/a:1013874327002
https://doi.org/10.1023/a:1013874327002
Autor:
José Durán, Beatriz Sosa de Borrego, Marlene González de Nava, Danis Pirela, Harvi Velásquez, José Morales
Publikováno v:
Atmospheric Research. 46:307-320
The concentration of nine water soluble ions in aerosol samples on cellulose filters collected by a high-volume cascade impactor was determined for two rural sites in Venezuela. Total suspended particles show a similar size distribution both dry and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6c3e24a06c1d5d81e0a15e11ad75e60
https://doi.org/10.1016/s0169-8095(97)00071-9
https://doi.org/10.1016/s0169-8095(97)00071-9
Autor:
Beatriz Sosa de Borrego, Marlene González de Nava, José Morales, Harvi Velásquez, Ligbel S de Graterol
Publikováno v:
Journal of Chromatography A. 804:289-294
Chemically suppressed ion chromatography with a Dionex Model 2000i/sp, IonPac AS11, IonPac AG11, ASRS-I system was used for the analysis of major organic and inorganic acids in precipitation samples collected in the city of Maracaibo during a one-yea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f001e1cad7c4470ca10597719ce6675b
https://doi.org/10.1016/s0021-9673(98)00030-2
https://doi.org/10.1016/s0021-9673(98)00030-2
Autor:
Marlene González de Nava, Hervín Ramírez, Harvi Velásquez, José Morales, Beatrice Sosa de Borrego, José Luis Díaz
Publikováno v:
Journal of Chromatography A. 739:295-299
Sulfur dioxide (SO2) is an atmospheric pollutant that at certain concentrations may produce harm to human health and contribute to acid rain formation. Measurements of SO2 concentrations were made at two sampling sites in the city of Cabimas, Venezue
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b81121879842a64bb7b7196db719358f
https://doi.org/10.1016/0021-9673(96)00196-3
https://doi.org/10.1016/0021-9673(96)00196-3
Autor:
Hilda Ledo de Medina, Harvi Velásquez, Magaly Santana, José Morales, Marlene González de Nava
Publikováno v:
Journal of Chromatography A. 671:193-196
Ion-exchange chromatography with a Dionex Model QIC system was used to identify and determine formic and acetic acid in event rains collected at the La Esperanza site (Zulia, Venezuela). Pyruvic acid was observed infrequently and always at very low c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e64b23de337fed0f88152d9d347599b6
https://doi.org/10.1016/0021-9673(94)80238-6
https://doi.org/10.1016/0021-9673(94)80238-6
Autor:
José Morales, L. Sanchez De Graterol, M. Gonzalez De Nava, Harvi Velásquez, Danis Pirela, B. Sosa De Borrego
The determination of eight heavy metals and nine water soluble ion concentrations in cellulose filters loaded with air particulate matter was carried out in two rural sites. The water soluble particles show a higher concentration of inorganic salts t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48eccf26261d42dac8d1ffbc5283fae3
https://doi.org/10.1016/b978-008042030-1/50162-1
https://doi.org/10.1016/b978-008042030-1/50162-1