TiO2-Photocatalyzed degradation of phenol in saline media in an annular reactor: hydrodynamics, lumped kinetics, intermediates, and acute toxicity

The photocatalytic degradation of phenol in aqueous suspensions of TiO2 under different salt concentrations in an annular reactor has been investigated. In all cases, complete removal of phenol and mineralization degrees above 90% were achieved. The reactor operational parameters were optimized and its hydrodynamics characterized in order to couple mass balance equations with kinetic ones. The photodegradation of the organics followed a Langmuir-Hinshelwood-Hougen-Watson lumped kinetics. From GC/MS analyses, several intermediates formed during oxidation have been identified. The main ones were catechol, hydroquinone, and 3-phenyl-2-propenal, in this order. The formation of negligible concentrations of 4-chlorophenol was observed only in high salinity medium. Acute toxicity was determined by using Artemia sp. as the test organism, which indicated that intermediate products were all less toxic than phenol and a significant abatement of the overall toxicity was accomplished, regardless of the salt concentration.(FAPERJ) Fundacao de Amparo a Pesquisa do Estado do Rio de JaneiroFUJBCNPqPADC

Reação de genótipos de feijão-caupi a Fusarium oxysporum f. sp. tracheiphilum, Rhizoctonia solani e Sclerotium rolfsii.

Os patógenos habitantes do solo Fusarium oxysporum f.sp. tracheiphilum, Rhizoctonia solani e Sclerotium rolfsii infectam o feijão-caupi e causam redução na sua produtividade. Considerando que, a adoção de cultivares resistentes a estes patógenos constitui-se numa das medidas de controle mais viáveis, este trabalho teve como objetivo avaliar a reação de genótipos de feijão-caupi a estes três patógenos radiculares F. oxysporum f.sp. tracheiphilum, R. solani e S.rolfsii. Os ensaios foram conduzidos sob condições de casa de vegetação e os 36 genótipos de feijão-caupi foram avaliados quanto à resistência a R. solani e S.rolfsii pelo método da infestação do solo com o inóculo dos respectivos patógenos. Já para avaliação de F. oxysporum f.sp. tracheiphilum os genótipos de feijão-caupi foram imersos numa suspensão do patógeno. A testemunha consistiu de plantas não inoculadas com os patógenos

Amazonia Camtrap: a data set of mammal, bird, and reptile species recorded with camera traps in the Amazon forest.

Abstract : The Amazon forest has the highest biodiversity on Earth. However, information on Amazonian vertebrate diversity is still deficient and scatteredacross the published, peer-reviewed, and gray literature and in unpublishedraw data. Camera traps are an effective non-invasive method of surveying vertebrates, applicable to different scales of time and space. In this study, we organized and standardized camera trap records from different Amazonregions to compile the most extensive data set of inventories of mammal,bird, and reptile species ever assembled for the area. The complete data setcomprises 154,123 records of 317 species (185 birds, 119 mammals, and13 reptiles) gathered from surveys from the Amazonian portion of eightcountries (Brazil, Bolivia, Colombia, Ecuador, French Guiana, Peru,Suriname, and Venezuela). The most frequently recorded species per taxawere: mammals:Cuniculus paca (11,907 records); birds: Pauxi tuberosa (3713 records); and reptiles:Tupinambis teguixin(716 records). The infor-mation detailed in this data paper opens up opportunities for new ecological studies at different spatial and temporal scales, allowing for a moreaccurate evaluation of the effects of habitat loss, fragmentation, climatechange, and other human-mediated defaunation processes in one of themost important and threatened tropical environments in the world. The data set is not copyright restricted; please cite this data paper when usingits data in publications and we also request that researchers and educator sinform us of how they are using these data