The k-Nearest Neighbor (KNN) algorithm was used to classify and select biodegradable packaging produced from fish gelatine incorporated with palm oil and clove and oregano essential oils. All reinforced films are highly resistant to attraction, with an emphasis on a sample of clove essential oil with a value of 53.18 MPa. Also, the addition of palm oil and essential oils increases the elasticity and thickness of the packages. The packages have antioxidant and antimicrobial properties with an inhibition zone for S. aureus of 11.73 and 11.23 mm for the film with essential oil of oregano and film with palm oil, respectively. KNN proved to be efficient for the classification and selection of packaging. The results highlighted the packaging with clove essential oil as the best for presenting the highest values of antioxidant activity, tensile strength, and elongation. Palm oil is an interesting alternative for applications in biodegradable films due to its antimicrobial activity, antioxidant properties, abundance, and low cost. Packaging made of fish gelatin with the addition of vegetable oils is a promising alternative for food applications.
IntroduçãoDevido ao sabor, características nutritivas e funcionais da manga, a mangicultura tem ganhado importância econômica, estando entre as dez culturas mais cultivadas no mundo, em aproximadamente 94 países. Devido ao clima propício, a cultura da manga se apresenta como uma das principais culturas nas regiões tropicais (MATOS, 2000).A manga é uma das frutas mais apreciadas no mundo, sendo consumida principalmente ao natural ou ainda transformada em inúmeros produtos, como polpa simples, sucos, sorvetes, compotas, produtos congelados, desidratados, liofilizados, molhos, doces, cosméticos, bebidas fermentadas e destiladas (FONSECA et al, 2006) . Os principais produtores de manga no Brasil são os estados de São
The objective of this study was to characterize the dairy production systems of the southeastern and northeastern mesoregions of Pará state. A total of 112 questionnaires were administered on rural properties with dairy cow milk production in the municipalities of Ulianópolis and Irituia from April to May 2013. The activity was conducted mainly by men between 36 and 70 years of age. The education level was low, with 67% of the cattle breeders having incomplete basic education and 20.5% being illiterate. Regarding herd feeding, only 19.6% of the breeders used energy supplements, and 13.39% used roughage supplements. Sanitation control was performed by 99.1% of the breeders, with vaccines against foot and mouth disease and brucellosis being the most common vaccines because they are mandatory. Milking was performed manually on 98.2% of the properties, and pre-dipping and post-dipping techniques were used on only 2.7% and 3.6% of the properties, respectively. Regarding management, 84.8% of the breeders did not perform financial planning, and 99.1% did not have a defined chart of accounts and cost centres and were unaware of their production costs. Average herd productivity was 4.34 L cow -1 day -1 , with average production varying between 30 L day -1 in units with fewer than 10 lactating cows and 355 L day -1 in those with over 55 cows. Age and education level were shown to hinder the access to knowledge and technological innovations in products, processes and management. Key words: Amazonia. Cow milk production. Competitiveness. Production systems. ResumoObjetivou-se com este estudo a caracterização dos sistemas de produção de leite das mesorregiões sudeste e nordeste paraense. com bovinocultura leiteira nos municípios de Ulianópolis e Irituia, entre os meses de abril e maio de 2013. A atividade era conduzida predominantemente por homens, com idade variando entre 36 a 70 anos. O nível de escolaridade identificado foi baixo, onde 67% dos pecuaristas possuiam ensino fundamental incompleto e 20,5% eram analfabetos. Com relação à alimentação do rebanho, apenas 19,6% realizavam suplementação com concentrado e 13,39% com volumoso. O controle sanitário era realizado por 99,1% dos produtores, sendo as vacinas contra febre aftosa e brucelose as mais aplicadas por serem obrigatórias. Em 98,2% das propriedades a ordenha era realizada de forma manual, sendo que apenas 2,7% e 3,6% respectivamente faziam uso das técnicas de pré-dipping, e pós-dipping. Quanto à gestão 84,8% não realizavam a composição do planejamento financeiro e 99,1% não possuíam plano de contas e centro de custos definidos, desconhecendo o custo de produção. A produtividade média do rebanho foi de 4,34 (L vaca -1 dia -1 ), com produção média variando entre 30 L dia -1 em unidades com menos de 10 vacas em lactação e 355 litros naquelas com mais de 55 vacas. Verificou-se que variáveis idade e escolaridade compromete o acesso ao conhecimento e as inovações tecnológicas de produtos, processos e gestão. Palavras-chave: Amazônia. Bovinocultura leiteira. Comp...
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