Respiratory and storage behavior of fresh cut 'Tommy Atkins' mango

The respiratory and storage behavior of fresh cut 'Tommy Atkins' mango, naturally ripened (NR) or with use of ethylene (RE), were studied. Fruits were selected, washed and disinfected (200 mgCl.L-1) and stored for 12 hours at 10°C. After this period, they were processed under hygienic conditions at 10°C, packaged in polyethylene terephthalate (PET) trays or in styrofoam trays wrapped with stretchable polyvinyl chloride (PVC) film and stored for up to 15 days at 3°C. The products were evaluated regarding the evolution of internal atmosphere in the packing (O2 and CO 2), development of weight, appearance, shelf life and consumer acceptability. The respiratory rate was measured before and after processing every two hours. The yield of 'Tommy Atkins' mango to produce fresh cut product was 48.09±0.95%. Increase of the respiration rate of both mango samples was verified one hour after the preparation (NR = 17.75 mL CO 2.kg-1.h-1; RE = 28.29 mL CO 2.kg-1.h-1), followed by stabilization at 3.76 and 8.07 mL CO2/kg.h, respectively. The percentage of O2 in packages was stable in all treatments, 15-20% in PVC trays, 18-20% in PET tray. The percentage of CO2 was steady around 1.5-2.5%. The products lost fresh mass during the storage, from 0.06% to 0.30% for PET trays and from 0.15% to 1.61% for trays covered with PVC. The appearance was considered appropriate for commercialization until the 13th day, whereas product from mangoes ripened with application of ethylene was for 11 days, presenting browning in the external surface. The naturally ripened mango presented the best flavor and consumer preference in relation to the mango ripened with application of ethylene for 11 days of storage. The control of hygienic conditions during the production and storage was good and with safety for until 10 days.

O uso da serragem no processo de minicompostagem

In this work used four cylindrical PVC (polyvinyl chloride) mini compost bins, they all had the same size and were identical, with 40 cm diameter and 75 cm length, they also were opened on both sides. Each mini compost bean received 35,5 kg of solid organic wastes, which were previously crushed and 6 kg of sawdust. It was evaluated during the composting process the C/N analyses, temperature measurement, humidity and pH. Results showed that the use of sawdust as a source of high carbon inputs on the mini compost beans and using low quantities of organic solid wastes reached temperatures as high as 65° C, keeping on the thermophilic phase for almost 6 days. After 18 days the environmental temperature was reached, the organic wastes were then laid to reach full maturity for 55 more days. The C/N ratio was initially around 30/1 and after 73 days it was around 12/1.

Tratamento térmico na manutenção da qualidade de lichias armazenadas sob refrigeração

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Qualidade de carambolas submetidas a diferentes tratamentos pós-colheita

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito de atmosfera modificada no controle de podridões pós-colheita e na qualidade de caqui cv. Fuyu

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Atmosfera modificada e aplicação de cloreto de cálcio em caqui Giombo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conservação pós-colheita de mangas produzidas na região de Jaboticabal-SP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Tratamento a plasma de polímeros comerciais transparentes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de plasmas em pressão atmosférica para modificação de polímeros biocompatíveis

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Conservação pós-colheita de goiaba pelo uso de reguladores de crescimento vegetal, cálcio e da associação destes com refrigeração e embalagens plásticas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conservação pós-colheita de mangaba (Hancornia Speciosa Gomes)

Pós-graduação em Agronomia - FEIS

Ability of Salmonella spp. to Produce Biofilm Is Dependent on Temperature and Surface Material

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação da eficácia de primers para metal na resistência ao cisalhamento da união entre cimentos resinosos e metais não nobres. Efeito do armazenamento em água

O sucesso das restaurações metálicas indiretas depende, dentre outros fatores, de uma união eficaz entre a estrutura metálica e o cimento dentário empregados. Sabe-se que os primers para metal atuam com comprovada eficácia na resistência adesiva dos cimentos resinosos às ligas nobres. Entretanto, pouco foi estudado sobre o efeito de tais materiais em ligas não nobres. O propósito deste estudo foi avaliar a eficácia de primers para metal na resistência ao cisalhamento da união entre cimentos resinosos e metais não nobres. Discos (9 mm de diâmetro e 3 mm de altura) foram fundidos em liga de NiCr (n=80) e em titânio comercialmente puro (Ti c.p.) (n=80) e foram incluídos em anel de PVC com resina acrílica quimicamente ativada. As superfícies dos discos foram regularizadas com lixas de carbeto de silício de granulação 320, 400 e 600 e jateadas com partículas de óxido de alumínio de 50 µm. Espécimes de cada metal foram divididos em quatro grupos (n=20). Uma matriz metálica bi-partida (5 mm de diâmetro interno e 2 mm de altura) foi posicionada na superfície do espécime. As áreas adesivas receberam um dos seguintes tratamentos: 1) Panavia F; 2) Alloy Primer e Panavia F; 3) Bistite DC e 4) Metaltite e Bistite DC. Para evitar a exposição dos cimentos à luz, estes foram espatulados e inseridos na matriz dentro de uma câmara de revelação radiográfica. Quarenta minutos após a confecção, os espécimes foram armazenados em água destilada a 37ºC por 24 horas e então termociclados (1.000 ciclos, 5ºC e 55ºC, 30 segundos cada banho). Após a termociclagem, os espécimes foram armazenados novamente nas mesmas condições descritas anteriormente por um período de 24 horas (n=10) ou de 6 meses (n=10) antes do ensaio de cisalhamento em uma máquina de ensaios mecânicos (Material Test System 810).

Avaliação do ciclo de vida dos tubos de PVC produzidos no Brasil

Naturally characterizes the human being the interference in the environment to ensure their survival and also convenience. After numerous environmental accidents caused by unbridled pursuit of this goal, the concern about providing for current needs without compromising the ability of the future generations to supply their own, gained space. In order to contribute to sustainable development the Life Cycle Assessment (LCA) was implemented. This tool is based on the concept that if the environmental impacts of a product or service are known, it is possible to take better decisions concerning its environmental aspects. The purpose of this research is to conduct the LCA of polyvinyl chloride (PVC), the world’s second most consumed thermoplastic. The methodology described in NBR ISO 14040 and NBR ISO 14044 was followed. As a result, the LCA of polyvinyl chloride produced in Brazil was obtained, and, therefore, the inventory of the product in question adapted to Brazilian reality. The research can be applied to various studies considering that actions were taken to ensure that it represents the Brazilian reality. Moreover, the procedures were described to guarantee the greatest transparency possible

Estudo sobre depósitos tecnogênicos no entorno da represa da Sabesp em Presidente Prudente-SP

The human being has a dependency with the natural environment, since it is from withdrawing resources from it is essential for their survival. But this relationship appears to be unbalanced from the moment that society emerges and changes the substrate in which land is located. In this context the study about the formation of technogenic deposits, has assisted in the preparation of environmental diagnoses in an area very changed by society. Technogenic deposits are sedimentary deposits originated by human activities in the environment, with special emphasis in this work in the fluvial plains. Their classification depends on both the manufactured materials found in its layers, and the processes that led to its formation. Thus, the main objective was to understand the formation history of technogenic deposits in the fluvial plains of the Santo Anastacio river and streams of Cedro and Cedrinho surrounding the dam of SABESP (Basic Sanitation Company of São Paulo) in Presidente Prudente-SP. The experimental proceedings are based mainly on realization of fieldwork to characterization study area, collection of technogenic materials in PVC´s (polyvinyl chloride) tube, and analysis of laboratory through of particle size analysis (EMBRAPA, 1997) of the technogenics layers... (Complete abstract click electronic access below)