Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Johnny Romero"'
Publikováno v:
Proceedings of the 20th LACCEI International Multi-Conference for Engineering, Education and Technology: “Education, Research and Leadership in Post-pandemic Engineering: Resilient, Inclusive and Sustainable Actions”.
Autor:
Blanca Zaray Patiño Solís, Roberto Johnny Romero Chevez, Fátima Mariuxi Conto Díaz, Jenny Leonor Pincay Criollo
Publikováno v:
RECIMUNDO. :356-367
A lo largo de la carrera odontológica hemos visto muchos casos de enfermedad periodontal en pacientes que usan prótesis parciales removibles esto se ha dado por muchas causas como mala higiene bucal, material de las prótesis, o simplemente pacient
Publikováno v:
Nutrient Cycling in Agroecosystems. 77:101-113
Conversion of “natural” savanna to agricultural soil is proceeding at a very fast rate. In this work, nitric oxide (NO) emissions were measured immediately after conversion of a “natural” grassland to fertilized agricultural fields (corn, sor
Autor:
E. Fernández, Geert K. Moortgat, Eugenio Sanhueza, Johnny Romero, J. Quesada, D. Grossmann, Paul J. Crutzen
Publikováno v:
Journal of Atmospheric Chemistry. 39:15-36
As part of the LBA-CLAIRE-98 experiment, ground level atmosphericconcentrations of O3, CO, hydroperoxides and organic acids weremeasured in the rainforest region in Surinam. Measurements of CO andO3 were also made at a coastal site.
Publikováno v:
Journal of Atmospheric Chemistry. 35:249-272
In recent field campaigns, boundary layer ozone concentrations were measuredat different sites in the Orinoco river basin (mainly savannahs) and nearbylocations (cloud forest and coastal sites), during dry and wet seasons. Theresults provide a compre
Publikováno v:
Chemosphere. 14:91-97
The TSP, SO4= and Pb levels observed downwind of a large refinery and in the city of Willemstad in Curacao are presented. The results show that wiht increasing wind speed TSP and SO4= levels increase while Pb levels decrease. On the other hand, at re
Publikováno v:
Science of The Total Environment. 23:3-10
Air pollution problems in three different tropical areas are presented. The levels of various atmospheric contaminants (i.e. SO4=) indicate that the operation of a large petroleum refinery affects a substantial portion of the island of Curacao. A sig
Publikováno v:
Chemosphere. 7:517-536
An evaluation of the NO, NO2 and O3 concentrations in downtown Caracas atmosphere at two different heights (1.5 and 56 m ) during the dry and wet season was performed. The qualitative variation of NO and NO2 concentrations throughout the day was the
Publikováno v:
Atmospheric Environment (1967). 21:2227-2231
Atmospheric concentrations and size distribution of suspended particles at 1.5 or 3.9 m height were determined at five Venezuelan savannah sites. The results show a bimodal distribution in both the vegetation burning and non-burning periods, with sig