Universidade Federal Rural do Rio de Janeiro

About: Universidade Federal Rural do Rio de Janeiro is a education organization based out in Seropédica, Brazil. It is known for research contribution in the topics: Population & Species richness. The organization has 6405 authors who have published 9852 publications receiving 105911 citations.

Non conventional technologies and impact on consumer behavior

Abstract: Consumers are becoming more conscious about the potentially negative impact of food processing on human health and the environment. In particular, there is increased public concern about the application of emerging technologies such as genetic modification to food production, particularly with respect to consumer perceptions of potential for negative impact of genetically modified organisms on ecology. However, less is understood about consumer acceptance of potentially controversial technologies where such technological innovation replaces traditional manufacturing methods, which themselves have the potential for environmental harm. In the present study, consumer acceptance of a genetically modified product was examined. In this research, the process of genetic modification had the potential for reducing the environmental impact caused by the alternative, traditional method of production. The analysis took account of the effects of other factors such as reduced price and brand in consumer decision making, as well as the provision of information about manufacturing process. The product investigated was vegetable oil. One hundred and sixty five consumers evaluated the relative importance of different combinations of manufacturing process (traditional process, versus genetic modification) as well as the commercial brand (familiar versus unknown), price (low v ersus high) and label image (sunflower versus an image of a green globe indicating environmental friendliness), on purchase intentions. The data were analysed using conjoint and cluster analyses. Three clusters of consumers were identified. The first cluster (11% of the sample) based the purchase intention decisions on the label the image. The second one (25% of the sample) preferred environmentally friendly oil, highly priced and branded as Mazola. The third cluster (19% of the sample) considered mainly information about manufacturing process as of importance to their decision about purchases. In particular, these consumers preferred products associated with information about “environmentally friendly processing methods”. The results are compared with a similar sample of British respondents, and the implications of cross-cultural differences discussed.

Investigation of SARS-CoV-2 infection in dogs and cats of humans diagnosed with COVID-19 in Rio de Janeiro, Brazil.

Abstract: BACKGROUND: Infection by SARS-CoV-2 in domestic animals has been related to close contact with humans diagnosed with COVID-19. Objectives: To assess the exposure, infection, and persistence by SARS-CoV-2 of dogs and cats living in the same households of humans that tested positive for SARS-CoV-2, and to investigate clinical and laboratory alterations associated with animal infection. METHODS: Animals living with COVID-19 patients were longitudinally followed and had nasopharyngeal/oropharyngeal and rectal swabs collected and tested for SARS-CoV-2. Additionally, blood samples were collected for laboratory analysis, and plaque reduction neutralization test (PRNT90) to investigate specific SARS-CoV-2 antibodies. RESULTS: Between May and October 2020, 39 pets (29 dogs and 10 cats) of 21 patients were investigated. Nine dogs (31%) and four cats (40%) from 10 (47.6%) households were infected with or seropositive for SARS-CoV-2. Animals tested positive from 11 to 51 days after the human index COVID-19 case onset of symptoms. Three dogs tested positive twice within 14, 30, and 31 days apart. SARS-CoV-2 neutralizing antibodies were detected in one dog (3.4%) and two cats (20%). In this study, six out of thirteen animals either infected with or seropositive for SARS-CoV-2 have developed mild but reversible signs of the disease. Using logistic regression analysis, neutering, and sharing bed with the ill owner were associated with pet infection. CONCLUSIONS: The presence and persistence of SARS-CoV-2 infection have been identified in dogs and cats from households with human COVID-19 cases in Rio de Janeiro, Brazil. People with COVID-19 should avoid close contact with their pets during the time of their illness.

Multicomponent Reactions for the Synthesis of Bioactive Compounds: A Review

Abstract: Multicomponent reactions (MCRs) are composed of three or more reagents in which the final product has all or most of the carbon atoms from its starting materials. These reactions represent, in the medicinal chemistry context, great potential in the research for new bioactive compounds, since their products can present great structural complexity. The aim of this review is to present the main multicomponent reactions since the original report by Strecker in 1850 from nowadays, covering their evolution, highlighting their significance in the discovery of new bioactive compounds. The use of MCRs is, indeed, a growing field of interest in the synthesis of bioactive compounds and approved drugs, with several examples of commerciallyavailable drugs that are (or can be) obtained through these protocols.

Effects of landscape and riparian condition on a fish index of biotic integrity in a large southeastern Brazil river

Abstract: Environmental conditions of a large river in southeastern Brazil were assessed by evaluating fish assemblage structure (index of biotic integrity, IBI), landscape use (forest, pasture, urban area, and tributary water) and riparian condition. A survey of the 338 km-long middle reach of the Rio Paraiba do Sul, containing a large urban-industrial complex, was conducted in two seasons: summer/wet and winter/dry. Fish were sampled with a standardized level of effort twice at seven sites, between March 2001 and April 2002, by gill nets, cast nets, sieves and seines. Riparian condition was evaluated by direct observations, and land use maps were used to assess landscape condition of an 8 km2 buffer surrounding each site. IBI scores ranged from 5 to 36 (out of a possible range of 4–40), with lowest values at an urban-industrial landscape, and highest scores upstream and downstream, indicating the river’s recovery capacity. The most appropriate time to assess IBI was during the winter/dry period, when sampling was more effective and the IBI was more sensitive to changes in environmental quality. Landscape use and riparian condition were correlated, and IBI was positively correlated with % pasture, % tributary area, and riparian condition, but negatively correlated with % urban area. In some cases urban areas eliminated riparian woody vegetation, destabilizing site physical habitat structure.