The herbicide glyphosate is the most widely used pesticide worldwide. Glyphosate and its major metabolite, aminomethylphosphonic acid (AMPA), have been frequently found in water samples. The widely used methods for determining these compounds are expensive and environmentally unfriendly due to reagent consumption for derivatization. Another possibility is the use of classic ion chromatography, albeit with low sensitivity and subject to interferences. Therefore, this study aimed to develop a method to directly and simultaneously determine glyphosate, AMPA, and common inorganic anions in water samples using gradient capillary ion chromatography without sample pre-treatment and derivatization. The proposed method was validated, presenting adequate linearity for glyphosate and AMPA with a determination coefficient (r2) > 0.998. Recoveries ranged from 94 to 105% and 79 to 113% for glyphosate and AMPA, respectively, with a relative standard deviation < 10%. The practical method limits of detection and quantification for both glyphosate and AMPA were 7.5 and 25 µg L 1, respectively. The method presented satisfactory results for the anions fluoride, chloride, bromide, nitrite, nitrate, phosphate, and sulfate, with limits of detection ranging from 7.5 to 200 µg L-1. Application of the method in water samples proved simple, efficient, and cost-effective, enabling the monitoring of these analytes in different water matrices.

A introdução de uma variedade cítrica numa nova área baseia-se principalmente na adaptação edafoclimática associada às propriedades físico-químicas dos frutos, necessitando de mais estudos sobre os aspectos sensoriais para conhecer as preferências do consumidor. Desta forma, o objetivo deste estudo foi avaliar a aceitação de laranjas ‘Navelina’ [Citrus sinensis (L.) Osb.] pelos consumidores e a intenção de compra, através da análise sensorial. Após colheita, foram analisadas as características físico-químicas dos frutos. Seguidamente, 131 julgadores, não treinados, foram questionados para avaliar as amostras da laranja ‘Navelina’, através do teste de aceitação realizado em cabines individuais com luz branca, de acordo com os atributos sensoriais do fruto: aparência, firmeza, aroma e sabor. No final, foi também questionado a intenção de compra do fruto. Os dados foram submetidos à Análise em Componentes Principais para descrever os resultados e o mapeamento das preferências interna. De acordo com os resultados, os frutos da Navelina apresentam excelentes atributos sensoriais e características físico-químicas associadas ao aspecto sem sementes, exigidas pelos consumidores que expressam alta preferência pelo seus frutos, principalmente em relação aos atributos de aparência e sabor, atendendo aos requisitos do mercado consumidor.

The introduction of citrus variety in new areas is mainly based on the edaphic and climatic adaptation linked to the physical-chemical properties of the fruits, requiring more studies about the sensory aspects to comprehend the consumer preferences. In this way, the aim of this study was to evaluate the acceptance of ‘Navelina’ [Citrus sinensis (L.) Osb.] navel oranges by consumers and the purchase intent, through sensory evaluation. To perform the harvest, the fruits were first analyzed in relation to the physical-chemical characteristics. Then, 131 untrained panelists representing the consumers were asked to evaluate samples of ‘Navelina’ through the acceptance test performed in individual booths with white light, according to the fruit attributes: appearance, firmness, aroma and taste. At the end, they were asked about the purchase intent of the fruit. The data was subjected to the Principal Component Analyses in order to describe the results and internal preference mapping. According to the results, the ‘Navelina’ fruits present excellent sensory attributes and physical-chemical characteristics associated to the seedless aspect, which are required by the consumers whose express high preference for its fruits, mainly based in the attributes of appearance and taste, attending to the standard requirements of the consumer market.

Avaliou-se germoplasma de melancia oriundo da agricultura tradicional do semiárido de Pernambuco, quanto à qualidade nutricional, em sistema agroecológico de produção para identificar genótipos promissores para programa de pré-melhoramento da espécie no Vale do Submédio São Francisco. Foram utilizados 23 acessos de melancia do Banco de Germoplasma de Hortaliças da Universidade Federal do Vale do São Francisco (BGH/UNIVASF) e quatro cultivares comerciais no delineamento de blocos ao acaso, com três repetições. O manejo adotado foi com base em técnicas agroecológicas. Colheu-se o fruto mais desenvolvido de cada planta e deles foram obtidas subamostras da polpa para compor a amostra composta, empregada na análise de qualidade. Avaliou-se o teor de sólidos solúveis, acidez total titulável, vitamina C, licopeno e a relação teor de sólidos solúveis/acidez total titulável. Observou-se uniformidade para o teor de vitamina C. Contudo, houve variabilidade para sólidos solúveis, relação sólidos solúveis/acidez total titulável e licopeno. Os acessos BGH/UNIVASF 67 e 121 são promissores por apresentarem boa qualidade de fruto e ampla dissimilaridade genética. Para maximizar as chances de ganhos genéticos pode-se cruzar a cultivar comercial Pérola ou “Sugar Baby” com acessos que também apresentaram boas médias e divergência genética, como o BGH/UNIVASF 67, 91 e 121.

We evaluated watermelon germplasm from traditional agriculture on the nutritional quality of fruits in an agroecological system of production for to identify promising genotypes for a pre-breeding program of the species in the Submiddle of the San Francisco Valley. We used 23 watermelon accessions of the Vegetable Germplasm Bank of the Federal University of Valley of the San Francisco (BGH/UNIVASF) and four commercial cultivars were used in a randomized block design, with three replicates. The management was based on agroecological techniques. We harvested the most developed fruit of each plant and from them we took samples of the pulp to form composite samples for quality assessment. We evaluated the content of soluble solids, total titratable acidity, vitamin C, lycopene and total soluble solids/total titratable acidity ratio. Uniformity was observed for vitamin C content. However, there was variability for soluble solids, soluble solids/titratable total acidity ratio and lycopene. The accessions BGH/UNIVASF 67 and 121 are promising because they have good fruit quality and large genetic dissimilarity. In order to maximize the chances of genetic gains we cancross the commercial cultivar “Perola” or Sugar Baby with accessions that presented good means and genetic divergence, such as BGH/UNIVASF 67, 91 and 121.

Assinala-se o encontro de anomalias em conchas de 90 espécimens de Biomphalaria straminea, traduzidas por acentuada deformação da última espiral. Os exemplares pertencem à população criada em laboratório e procedente de Curvelo, Minas Gerais, Brasil.

The occurrence of 90 Biomphalaria straminea shells displaying marked deformation in their last whorl, is reported. The referred to planorbid population originates from a strain collected, about three years ago, in Curvelo, MG (Brazil), and which has been kept in laboratory glass aquarium.

Assinala-se o encontro de anomalias em conchas de 90 espécimens de Biomphalaria straminea, traduzidas por acentuada deformação da última espiral. Os exemplares pertencem à população criada em laboratório e procedente de Curvelo, Minas Gerais, Brasil.

The occurrence of 90 Biomphalaria straminea shells displaying marked deformation in their last whorl, is reported. The referred to planorbid population originates from a strain collected, about three years ago, in Curvelo, MG (Brazil), and which has been kept in laboratory glass aquarium.