Nitrate Reductase And Glutamine Synthetase Activities In S1 Endogamic Families Of The Maize Populations Sol Da Manhã Nf And Catetão

The possibility of improving nitrogen use efficiency in maize was investigated using S1 endogamic families of the populations Sol da Manhã NF and Catetão. A simple 10 × 10 lattice design was adopted and the trials carried out at the experimental field of MITLA AGRÍCOLA LTDA, in Uberlândia, State of Minas Gerais, during the 1994/95 planting season. Based on grain production figures, the three best and three worst performing S1 endogamic families were selected for this study. These were pooled to form four sub-populations denominated NFB, NFR (the best and worst families, respectively, of the Sol da Manhã NF variety), CATB and CATR (the best and worst families, respectively, of the Catetão variety). Each of these sub-populations was evaluated under greenhouse conditions. The experimental design was factorial with treatments arranged in randomized blocks. Sample replicates consisted of pots with four plants. Feeding with modified Hoagland's nutrient solution began on the seventh day after sowing. The study involved four nitrogen regimes, where varying proportions of NO3 - and NH4 + were formulated, such that the nutrient solution contained the following mixtures: 75% NO3 -: 25% NH4 +; 25% NO3 -: 75% NH4 +; 50% NO3 -: 50% NH4 + (all high N mixtures) and 5% NO3 -: 5% NH4 + (low N mixture). Twenty-five days after planting, the activities of the enzymes nitrate reductase and glutamine synthetase (transferase and synthetase assays) were determined for the leaves using the third topmost expanded leaf of the four plants in each pot. 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Removal of suspended solids in irrigation water utilizing non-woven synthetic fabrics

The objective of this work was to verify the efficiency of trickle irrigation filters on the removal of suspended solids using as filter elements three different types of non-woven synthetic fabrics. Also, was conducted an experiment with disk and screen elements in order to compare with the non woven synthetic fabric element. The results have demonstrated that non-woven synthetic fabrics presented better performance, removing 27 to 29% of suspended solids, while screen and disk elements presented 19 to 20% removal. No significant differences were observed among the three fabrics evaluated as well as between the screen and disk elementsCom vistas à eficiência de remoção de sólidos em suspensão, quando utilizados em filtros para irrigação localizada, empregaram-se três tipos diferentes de manta sintética não tecida, além de elemento de tela e de disco. Como resultado, as mantas tiveram desempenho superior, ou seja, 27 a 29% de remoção de sólidos em suspensão, enquanto os elementos de tela e disco apresentaram apenas 19 a 20%; contudo, dentre as três mantas avaliadas não foram observadas diferenças significativas, o mesmo ocorrendo entre os elementos de tela e disco.38238

Qualidade da agua.

IMPORTÂNCIA DA ÁGUA NA AGRICULTURA; PRINCIPAIS CARACTERÍSTICAS DOS MANANCIAIS; AMOSTRAGEM DA ÁGUA PARA ANÁLISE; PARÂMETROS FÍSICOS, QUÍMICOS E BIOLÓGICOS DE QUALIDADE DA ÁGUA; INTRODUÇÃO ÀS TÉCNICAS DE TRATAMENTO DE ÁGUA PARA IRRIGAÇÃO; ESTUDO DE CASOS

Agricultura e biodiversidade nas ciências sociais brasileiras: alimentando a comunicação entre ciência e políticas públicas.

O presente artigo decorre de uma reflexão sustentada em dois pressupostos: a) que as ciências e, em particular, as sociais, podem contribuir para informar as tomadas de decisão e a formulação de políticas públicas visando a melhoria da vida das pessoas no planeta e b) que o papel da agricultura na conservação da biodiversidade é uma questão atual de extrema relevância e que merece ser aprofundada. A relação entre a agricultura e a biodiversidade tem sido objeto de questionamentos recentes na sociedade e no campo das políticas públicas. Contudo, se os estudos relacionados à biodiversidade e à agricultura, separadamente, têm observado um considerável crescimento no Brasil, poucos são os investimentos de pesquisa sobre a relação entre esses dois grandes temas. A partir dessas considerações, seguimos dois objetivos principais: 1) investigar como o papel da agricultura familiar na preservação da biodiversidade tem sido abordado pelas Ciências Sociais no Brasil, particularmente nos artigos publicados em periódicos brasileiros nos últimos 20 anos; 2) testar uma metodologia de revisão bibliográfica, criteriosa, que possa ser útil aos tomadores de decisão em políticas públicas e demais interessados

The use of Moringa oleifera seeds for treatment of surface water

This research had as its main purpose the evaluation of the use of natural coagulate, obtained from Moringa oleifera seeds and their efficiency in the slow direct filtration and sedimentation processes for the treatment of highly turbid water. In developing countries such as Brazil, technologies for water treatment must provide the possibility of water purification in an easy, self-maintainable and low cost process, for people who live in regions characterized by shortage of drinking water. Studies so far suggest that there is a potential application of Moringa oleifera in the water treatment with slow direct filtration. A flocker composed of a PET bottle and three filters composed of similar bottles with non-woven synthetic blanket were used in the slow filtration, with a discharge of affluent water to the filters of approximately 4 m³ m-2 d-1. In the water treatment process evaluation of the sedimentation efficiency, a flocker composed of PET bottles and a sedimentation tank was used. The water used for these experiments was the synthetic water obtained by bentonite, which presents adequate qualitative characteristics for the analysis.Visou-se, no presente trabalho, estudar o uso de sementes de Moringa oleifera para tratamento de água superficiais por filtração lenta direta em mantas sintéticas não tecidas e por sedimentação simples. Nos países em desenvolvimento, como o Brasil, as tecnologias para tratamento de água devem proporcionar às pessoas que habitam em regiões carentes de água potável, a possibilidade de sua clarificação, de maneira fácil, auto-sustentável e a baixo custo. Os estudos referidos no presente trabalho sugerem haver potencial de aplicação da Moringa oleifera. Utilizaram-se, no tratamento da água com Filtração Lenta Direta, um floculador constituído de garrafa Pet e três filtros, do mesmo material, com mantas sintéticas não tecidas, empregadas na filtração lenta, com vazão de água afluente aos filtros de aproximadamente 4 m³ m-2 d-1. No processo de tratamento de água em que se avaliou a eficiência da operação de sedimentação, o floculador era de garrafas pet e um tanque de sedimentação. A água bruta empregada na realização dos experimentos foi a água sintética obtida por Bentonita, a qual apresenta características qualitativas adequadas aos ensaios.76577

Processing of Moringa oleifera seeds using different equipments to obtain coagulant solution

This work was condcted to assess four different equipments used in processing seeds of Moringa oleifera to produce a coagulant solution to be used in water treatment with the turbidity obtained synthetically. Six coagulant solutions with different types of processing were used in assays of coagulation, flocculation and sedimentation in Jar-Test equipment. The dose of coagulant solution was 500 mg L-1 and the evaluated parameters were turbidity and apparent color. After 30 min of sedimentation, it was clear that the best processes to reduce turbidity and apparent color were the pestle and grinder, respectively, however, in both cases the sieving of the powder was essential in reducing the parameters in question. Using a blender and a mixer the reduction rates of turbidity and apparent color were the lowest. The grinding of the seeds during processing in the grinder and the pestle remove part of the oil present in them, which does not occur when using the blender and mixer, stating that the removal of oil present in the seeds result in a more efficient coagulant solution.Desenvolveu-se este trabalho para avaliar o uso de quatro equipamentos no processamento das sementes de Moringa oleifera, visando à produção de solução coagulante a ser empregada no tratamento de água com turbidez obtida sinteticamente. Seis soluções coagulantes com diferentes tipos de processamento foram utilizadas em ensaios de coagulação, floculação e sedimentação em equipamento Jar-Test. A dosagem da solução coagulante utilizada foi 500 mg L-1 e os parâmetros avaliados foram turbidez e cor aparente; verificou-se, após 30 min de sedimentação, que para redução de turbidez e cor aparente os melhores processamentos foram com pilão e máquina de moer, respectivamente, sendo que em ambos os casos o peneiramento do pó foi essencial para a redução dos parâmetros em questão. Através de liquidificador e mixer, os índices de redução de turbidez e cor aparente foram os menores encontrados e a trituração das sementes durante o processamento na máquina de moer e no pilão remove parte do óleo neles presente, o que não ocorre com o uso do liquidificador e mixer, evidenciando que a retirada do óleo presente nas sementes resulta em solução coagulante com maior eficiência.66166

Potencial da água de chuva na produção de leite e o impacto na redução do consumo.

O estudo objetivou a avaliação da viabilidade do uso da água de chuva no seu aspecto qualitativo e quantitativo em atividade de produção de leite com possível extensão de sua aplicação a outras atividades de produção rural. Para tanto uma estrutura de captação, armazenamento e tratamento foi montada e um plano de amostragens quinzenais estabelecido com objetivo de avaliar a qualidade físico-química e microbiológica da água captada. Com o auxílio de hidrômetros e um pluviômetro foram coletados dados de precipitação e registrado o volume de entrada de água nos reservatórios com objetivo de calcular os volumes captados e armazenados

What do nurses think about telenursing? A descriptive Italian study

Introduction: Telenursing is a new nursing approach to improve continuity, quality and safety of care and patient outcomes. This study aims to describe the viewpoint of Italian nurses on their knowledge, attitudes, and barriers to telenursing. Materials and methods: This descriptive study following the STROBE guidelines was conducted in August 2022 through a web survey. A non-validated questionnaire and convenience snowball sampling were used. Descriptive statistical analysis was performed. Results: 323 nurses were included in the study. 75% of nurses were female, prevalently employed in hospitals (81%). Digital devices were present in 76% of healthcare facilities, but 82% of the sample had never carried out telenursing interventions. The academic training of 75% of nurses does not include telenursing education, and 93% of the sample would be interested in training on the topic, considering their previous knowledge insufficient (54%). Surveyed nurses believe telenursing could improve communication in the care team, patient safety (70%), and quality of care (45%). In nurses' opinion, patients' main barriers would be low digital literacy, use complexity and lack of resources. In addition to sharing the same barriers as patients, nurses need more skilled and exclusively assigned staff and better interconnection between the resources used. Conclusion: In Italian nurses’ opinion, telenursing should improve the quality and safety of care and team communication. The main barriers described by the present study (lack of knowledge, resources, integration, and complexity of the tools used) suggest the need for multi-level interventions and studies to increase its use between nurses and patients