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| Registros recuperados: 237 | |
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| DIAS,CINTIA M.M.; ROSA,LUIZ P.; GOMEZ,JOSE M.A.; D’AVIGNON,ALEXANDRE. |
| ABSTRACT Sanitation (which includes national public policies for drinking water, sewage services and waste management) is precarious in Brazil and therefore poses a challenge to a range of actors. Poor sanitation impacts public health, education, the environment, and daily life. Globally, it emits increasing greenhouse gases. Universalization of any major public service appears difficult, if not impossible; however, Brazil’s program to universalize access to electricity proves the opposite, as will be shown in this paper. By describing the successful implementation of electricity for everyone, we show that planned public efforts, coordinated with private initiatives and local communities, have worked, and the same can be achieved for the sanitation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solid Waste (SW); Water; Sewage; Sanitation; Greenhouse gases; Sustainable Development Goals (SDGs). |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401337 |
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| Machado,E.C.L.; Stamford,T.L.M.; Alves,L.C.; Melo,R.G.; Shinohara,N.K.S.. |
| Cryptosporidium spp. oocyst recovery in water and milk samples was evaluated. Samples were inoculated with a suspension of 1.2×10(7) Cryptosporidium spp. oocysts and submitted to centrifugal flotation, using different solutions (sucrose, NaCl, MgSO4, ZnSO4, AlSO4, NH4SO4 40% and NH4SO4 80%). Centrifugation of the samples was carried out in two stages for concentration using two methods that differed in the order in which the saturated solutions were used, namely only in the first stage of method I and only in the second stage of method II. Oocyst identification was performed using the Kinyoun and Koster histochemical staining techniques. Samples analyzed by method I showed different degree of oocyst recovery, namely 10.9% with NaCl and 42.5% with MgSO4 in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oocyst; Cryptosporidium spp.; Concentration methods; Water; Milk. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000300023 |
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| Pereira,Luciano; Mazzafera,Paulo. |
| Plant yield and resistance to drought are directly related to the efficiency of the xylem hydraulic conductance and the ability of this system to avoid interrupting the flow of water. In this paper we described in detail the assembling of an apparatus proposed by TYREE et al. (2002), and its calibration, as well as low cost adaptations that make the equipment accessible for everyone working in this research area. The apparatus allows measuring the conductance in parts of roots or shoots (root ramifications or branches), or in the whole system, in the case of small plants or seedlings. The apparatus can also be used to measure the reduction of conductance by embolism of the xylem vessels. Data on the hydraulic conductance of eucalyptus seedlings obtained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Conductivity; Cavitation; Embolism. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000400017 |
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| Bello,Antonio Roberto Crystal; Angelis,Dejanira de Franceschi; Domingos,Roberto Naves. |
| Processes like ultrasound, chlorination and filtration-adsorption were compared to eliminate microorganisms and to adjust established parameters of public drinking water. A mini water treatment plant (WTP-CB), in pilot scale, was projected and built to evaluate each process influence as: decontamination, coagulation-flocculation, sedimentation and filtration. Total and fecal coliforms, Escherichia coli and heterotrophic bacteria and physic/chemical parameters were quantified from water. Ultrasound, chlorination and filtration-adsorption were efficient to inactivate and/or eliminate bacteria. Ultrasound decontamination in addition to coagulation-flocculation, sedimentation and filtration, could be considered as an alternative treatment water solution where... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Filtration; Microorganisms; Ultrasound; Chlorination. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600009 |
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| Silva,Lidiane Roberta Cruz da; Souza,Odacy Camilo de; Fernandes,Maria José dos Santos; Lima,Débora Maria Massa; Coelho,Rosalie Reed Rodrigues; Souza-Motta,Cristina Maria. |
| Litopenaeus vannamei, which is the most common shrimp species cultivated in the northeast of Brazil, is very susceptible to microbial diseases, and this consequently affects productivity. There are reports of bacteria, viruses and protozoa in these shrimp, but not fungi. This study aims to isolate and identify fungi present in shrimp Litopenaeus vannamei, and in their nursery waters, at two breeding farms in Brazil. The pathogenic potential of the isolates was assessed through the qualitative detection of proteases and aflatoxin B production. The 146 isolated fungi comprised 46 species. Aspergillus, Penicillium and Furarium were the three most relevant genera and Aspergillus flavus was the predominant species with a total of 33 isolates. Most of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shrimp; Fungi; Water; Protease; Aflatoxin B. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100007 |
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| Beloti,Vanerli; Souza,Juliana Aparecida de; Barros,Márcia de Aguiar Ferreira; Nero,Luís Augusto; Mattos,Marcos Rodrigues de; Gusmão,Viviane Vieira; Moraes,Luciane Bilia de. |
| Petrifilm EC and HS were compared to the MPN method to determine their efficacy to enumerate total coliforms and E. coli in 145 samples of water (76 water in natura, 69 drinking water). For water in natura, Petrifilm HS and EC showed good correlation with MPN method. In chlorinated water (< 20 col/100 mL and negatives) the agreement was low. For E.coli enumeration, Petrifilm EC showed a good correlation with MPN method. The results indicated that Petrifilm EC and HS are accurate to enumerate coliforms and E. coli in water when the expected counts are higher than 20/100 mL. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Water; Coliforms; Escherichia coli; Petrifilm. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400002 |
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| Lima,José de Ribamar Oliveira; Marques,Sirley Garcia; Gonçalves,Azizedite Guedes; Salgado Filho,Natalino; Nunes,Paulo Cruz; Silva,Hernandes Sousa; Monteiro,Silvio Gomes; Costa,Jackson Mauricio Lopes. |
| Rigorous control of water quality in hemodialysis services is extremely important in order to guarantee a better quality of life of the patients submitted to this treatment. The lack of adequate water monitoring has caused the death of various patients in the past. The objective of the present study was to determine the physicochemical and bacteriological characteristics of water used by hemodialysis services in hospitals of the city of São Luís, Maranhão, Brazil. Bacteriological analyses included the membrane filter method for the determination of total coliform bacteria, the Cult-Dipcombi-TTC-agar method for heterotrophic bacteria and the limulus amebocyte lysate method for the determination of endotoxins. Eighteen water samples obtained from three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Microbiology; Hemodialysis; Contamination. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000200001 |
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| Vicente,Hinig Isa Godoy; Amaral,Luiz Augusto do; Cerqueira,Aloysio de Mello Figueiredo. |
| The objective of this study was to determine the prevalence of Shigatoxigenic Escherichia coli (STEC) and STEC serogroups O157, O111 and O113 in feces, water and milk sampled in dairy farms in Jaboticabal, SP, Brazil. Feces (n=454), water (n=54) and milk samples (n=30) were collected from 10 herds and assessed for the presence of the virulence genes stx1, stx2 and eae by polymerase chain reaction (PCR). All stx and eae positive samples were submitted to a second PCR reaction targeting the sequences rfb O157, rfb O111 and rfb O113. High prevalence of stx was detected (59.9%) in fecal samples, whereas the prevalence of sequences rfb O157, rfb O111 and rfb O113 was 18.9%, 3.3% and 30.4%, respectively. All sequences were detected more frequently in calves and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shigatoxigenic; Escherichia coli; Milk; Water; Bovine feces. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300003 |
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| Reche,Maria Helena Lima Ribeiro; Fiuza,Lídia Mariana. |
| Bacteria are the most diverse living beings on earth and only a fraction of them have been identified. This paper aims at the analysis of the diversity of mesophilic and heterotrophic bacteria found in samples of irrigation water from rice-fields areas in Rio Grande do Sul State, Brazil. Sample collection was carried out in five rice crop regions areas and followed by isolation, multiplication and bacterial characterization. The species' identification was based on biochemical tests (API-System, bioMérieux). Bacterial diversity was determined by the Shannon & Weaner and Pielou index. The results regarding bacterial diversity revealed 26 species. The most abundant representatives belonged to the Bacillus, Corynebacterium, Staphylococcus and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Diversity; Water; Rice-field. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300009 |
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| Bizani,Delmar; Brandelli,Adriano. |
| The presence of Aeromonas spp. in food has been demonstrated. They are often introduced from water, which is the natural habitat of many species and is thought to be the main source of contamination. The occurrence of Aeromonas spp. was investigated in 70 water samples of a bovine abattoir. Aeromonas spp. were present in 21.4% of water samples. A. hydrophila was isolated from 11.4% of supplying water samples and from 25.7% of the water drained from carcasses, whereas A. sobria was sole isolated from 5.7% of supplying water samples. Although greater number of positive samples were from water drained from carcasses, only A. hydrophila isolates were present. This suggests that the supplying water is the source of contamination. The antibiotic susceptibility... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aeromonas; Antibiotic activity; Aquatic environment; Hemolysis; Water. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400016 |
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| Gu,Quan; Li,Xunde; Qu,Pinghua; Hou,Shuiping; Li,Juntao; Atwill,Edward R.; Chen,Shouyi. |
| Strains of Francisella spp. were isolated from cooling water from an air conditioning system in Guangzhou, China. These strains are Gram negative, coccobacilli, non-motile, oxidase negative, catalase negative, esterase and lipid esterase positive. In addition, these bacteria grow on cysteine-supplemented media at 20 °C to 40 °C with an optimal growth temperature of 30 °C. Analysis of 16S rRNA gene sequences revealed that these strains belong to the genus Francisella. Biochemical tests and phylogenetic and BLAST analyses of 16S rRNA, rpoB and sdhA genes indicated that one strain was very similar to Francisella philomiragia and that the other strains were identical or highly similar to the Francisella guangzhouensis sp. nov. strain 08HL01032 we previously... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Francisella; Air conditioning; Water. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300921 |
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| Loureiro,Silvia Tereza Azedo; Cavalcanti,Maria Auxiliadora de Queiroz; Neves,Rejane Pereira; Passavante,José Zanon de Oliveira. |
| The aim of this work was to isolate and identify yeasts from sand and sea water collected in two beaches of Olinda, Pernambuco state, Brazil. Thirty two samples of both sand and water in both beaches were obtained in the dry (December 2000 and February 2001) and rainy (June and July 2001) seasons. Two hundred and ninety two strains of yeast were obtained, and they belonged to four genera and 31 species. Candida was the most prevalent genus. Candida catenulata, C. fenica, C. sake, Brettanomyces bruxelenses and Rhodotorula mucilaginosa were the most commonly found species in both beaches Bairro Novo and Casa Caiada. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Sand; Water; Beaches. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400005 |
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| Pereira,Juliane Mascarenhas; Aquino,Ana Carolina Moura de Sena; Oliveira,Daiana Cardoso de; Rocha,Gabriela; Francisco,Alícia de; Barreto,Pedro Luiz Manique; Amante,Edna Regina. |
| ABSTRACT: Sour cassava starch is a naturally modified starch produced by fermentation and sun drying, achieving the property of expansion upon baking. Sour cassava starch' bakery products can be prepared without the addition of yeast and it is gluten free. The fermentation process associated with this product has been well studied, but the wastewater, with high acidity and richness in other organic compounds derived from starch degradation, requires further investigation. In this study, the structure of solids present in this residue was studied, seeking to future applications for new materials. The solids of the wastewater were spray dried with maltodextrin (MD) with dextrose equivalent (DE) of 5 and 15 and the structure of the powder was evaluated by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sour cassava starch; Fermentation; Water; Microstructure. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400732 |
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| Registros recuperados: 237 | |
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