oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 254 )

2018 ( 610 )

2017 ( 610 )

2016 ( 784 )

Custom range...

Search Results: 1 - 10 of 454659 matches for " Júlia de;Mattiuz "
All listed articles are free for downloading (OA Articles)
Page 1 /454659
Display every page Item
Manuten??o da qualidade de rosas cortadas cv. Vega em solu??es conservantes
Pietro, Júlia de;Mattiuz, Ben-Hur;Mattiuz, Claudia FM;Rodrigues, Teresinha de JD;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000100011
Abstract: the rose is considered one of the most traditional and required cut flowers in the world market. however, after cutting, these flowers become highly perishable, because the high metabolic activity leads to senescence processes. the experiment was accomplished to verify the effect of holding solutions on the postharvest physiology of cut red roses, cv. vega. a randomized design in a factorial scheme composed by two factors was used: seven postharvest treatments and four evaluation dates. the flowers remained in the following holding solutions: 1) distilled water; 2) 8-hydroxyquinoline citrate (200 mg l-1); 3) 8-hydroxyquinoline citrate (200 mg l-1) + sucrose (20 mg l-1); 4) citric acid (75 mg l-1); 5) citric acid (75 mg l-1) + sucrose (20 mg l-1); 6) 6-benzyladenine (60 mg l-1); 7) 6-benzyladenine (60 mg l-1) + sucrose (20 mg l-1). qualitative and physiologic analyses were carried out during the evaluation period. the treatment with 8-hydroxyquinoline citrate and citric acid were the most promising to keep the quality and extend the vase life of flowers content; better maintenance of soluble and reducing carbohydrates, anthocyanin and color.
Influência do 1-MCP na conserva??o pós-colheita de rosas cv. Vega
Pietro, Júlia De;Mattiuz, Ben-Hur;Mattiuz, Claudia Fabrino Machado;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000500014
Abstract: the objective of this work was to study aspects of postharvest physiology of cut roses cv. vega, treated with different concentrations of 1-metilcloropropene (1-mcp). the experiment was conducted in a complete randomized design composed of two factors: four postharvest treatments and four dates of evaluation (0; 4; 8; 12 days). the following treatments were used: 1) distilled water; 2) 1-metilciclopropeno (1-mcp) 100 ppb; 3) 1-mcp 250 ppb; 4) 1-mcp 500 ppb. the following evaluations were made: fresh weight, color, turgor, curvature, respiration rate, relative water content, content of soluble carbohydrates, reducing and anthocyanin. unlike treatment with distilled water, all concentrations of 1-mcp were effective in delaying the senescence of flowers; however, the concentration of 1-mcp at 500 ppb was highlighted by better maintenance of quality and extended decorate life stem up to 19 days.
Inibidor da a??o do etileno na conserva??o pós-colheita de Chrysanthemum morifolium Ramat cv. Dragon
Spricigo, Poliana Cristina;Mattiuz, Ben-Hur;Pietro, Júlia de;Mattiuz, Claudia Fabrino Machado;Oliveira, Maria Elisa Morais de;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000500015
Abstract: the durability and postharvest quality of cut flowers are fundamental attributes in value along the production chain and in consumer satisfaction. the objective of this study was to evaluate the effect of chemical inhibitors of ethylene action on maintaining the postharvest quality of chrysanthemum stems (chrysanthemum morifolium ramat cv. dragon). the experiment tested maintenance solutions with silver thiosulfate (sts) under five levels (distilled water, a 0.2 mm sts, the sts 0.2 mm + sucrose at 50 g l-1, sts at 0.4 mm; sts at 0.4 mm + sucrose at 50 g l-1), and date of sampling, for three levels (0, 3, 6 days). three replications with two flower stems in each treatment were used in the experiment. physical assessments were made: color, fresh mass and relative water content; chemical evaluations: reducing sugars and pigments, and qualitative assessments: turgidity, flower color, and number of buds, open flowers and partially open flowers. treatment with 0.2 mm sts resulted in better maintenance of fresh mass of stems. the concentration of pigments and reducing sugar was higher in those treatments in which sucrose was associated. the color and relative water content were favored in treatments sts 0.2 mm and 0.4 mm. the concentration of 0.2 mm sts obtained the best results, prolonging the vase life the stems. the quality of these stems was higher, with the best assessments of water content, color and turgidity.
Solu??es de manuten??o na pós-colheita de Chrysanthemum morifolium cv. Dragon
Spricigo, Poliana Cristina;Mattiuz, Ben-Hur;Pietro, Júlia De;Mattiuz, Claudia Fabrino Machado;Oliveira, Maria Elisa Morais de;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000500023
Abstract: the development and use of techniques that extend the life vase of the flowers, maintaining the quality of the product, is essential for reducing postharvest losses. the objective of this work was to evaluate different solutions for maintenance, associated or not to sucrose, in maintaining the postharvest quality of chrysanthemum stems. the treatments used distilled water, 8-hqc to 100 mg l-1, 8-hqc to 100 mg l-1 + sucrose 50 g l-1, 8-hqc to 200 mg l-1, 8-hqc to 200 mg l-1 + sucrose 50 g l-1. physical assessments were made: color, fresh mass and relative water content; chemical evaluations: reducing sugars and pigments, and qualitative assessments: turgidity, color of the flowers, and number of buttons, open flowers and partially open flowers. the combination of 8-hqc 200 mg l-1 + sucrose 50 g l-1 was the best performance that made for maintaining the quality of flower stems, favoring the opening of buttons and turgidity of petals. sucrose contributed to better maintenance of the reserve substances in the shaft, which had increased the flower vase life.
Longevity of Oncidium varicosum (Orchidaceae) inflorescences treated with 1-methylciclopropene
Mattiuz, Claudia Fabrino Machado;Mattiuz, Ben-Hur;Rodrigues, Teresinha de Jesus Deléo;Pietro, Júlia de;Martins, Ramilo Nogueira;Grossi, Selma de Fátima;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012005000028
Abstract: oncidium varicosum belongs to orchidaceae family and nowadays it is commercialized on large scale due to its potential as cut flower. the species distinguishes decoratively in function of the high number of flowers golden yellow that compose its great and delicate inflorescence. the hormone ethylene performs an important function in the processes related with the senescence of cut flowers, and especially in relation to orchids anti-ethylene treatments are recommended to extend the vase life. among chemicals used today for the postharvest treatment of flowers the 1-methylciclopropene (1-mcp) is an efficient inhibitor of autocatalytic production of ethylene. this research aimed to evaluate the effect of different concentrations of 1-methylciclopropene (control and 1-mcp: 250ppb, 500ppb, 1000ppb) upon physiological aspects of cut inflorescences of oncidium varicosum. the best treatment was 1-mcp 1000ppb and the flowers presented larger values of water content, soluble carbohydrates, reducing sugars, carotenoids and the respiration rates were lower. these results contributed to higher quality and longer life of inflorescences.
Armazenamento refrigerado de inflorescências cortadas de Oncidium varicosum 'Samurai'
Mattiuz, Claudia Fabrino Machado;Rodrigues, Teresinha de Jesus Deléo;Mattiuz, Ben-Hur;Pietro, Júlia de;Martins, Ramilo Nogueira;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010001100007
Abstract: the effectiveness of low temperatures on extending vase life of several cut flowers has been largely investigated. however, the temperature effect depends on the length of the storage period and of the floral species. the experiment was accomplished to evaluate the longevity and the metabolic changes which occurred during the cold storage of cut inflorescences of oncidium varicosum 'samurai' kept under different temperatures (5, 10 and 20°c). the following parameters were analyzed: relative water content (rwc), soluble carbohydrates, reducing sugars, carotenoids contents, color and longevity. the results indicated differences among the measured parameters at the three storage temperatures. the inflorescences of oncidium varicosum 'samurai' stored at 5oc presented better maintenance of flowers quality than at the other temperatures. it was evidenced by the lower reduction of rwc, better maintenance of carotenoids, soluble carbohydrates and reducing sugars. the flowers kept at 5°c also presented maintenance of coloration and greater longevity.
Processamento mínimo de mam?o 'formosa'
TEIXEIRA, Gustavo Henrique de Almeida;DURIGAN, José Fernando;MATTIUZ, Ben-Hur;ROSSI JúNIOR, Oswaldo Durival;
Ciência e Tecnologia de Alimentos , 2001, DOI: 10.1590/S0101-20612001000100011
Abstract: this work was undertaken to verify the effect of cutting size, 2.5 x 2.5cm (chunk 1), 2.5 x 5.0cm (chunk 2), and storage temperatures (3, 6 and 9oc), on atmosphere modification rate and chemical characteristics of `formosa' fresh-cut papaya packed in plastic cups (500 ml). the co2 concentration into theses cups increased fron two to three fold during first 6 hours after cutting, then it decreased and stabilized. this concentration increased with the storage temperature increasing. the chunks's moisture remarkably decreased in the first 2 days, and the temperature which best sustained the moisture was 6oc. the titratable total acidity was lower in chunk 2, with the highest reductions at 6 and 9oc. the total soluble solids content did not vary between treatments, and hygienic care adopted during processing allowed to obtain low microbial counting products, 103 cfu.g-1 in chunks stored at 9oc after seven days and with good maintenance of its sensorial quality. these results allow to indicate `formosa' papaya for fresh-cuts production, in chunk form, with refrigerated conservation (3 e 6oc ) for 7 day periods.
Processamento mínimo de mam o 'formosa'
TEIXEIRA Gustavo Henrique de Almeida,DURIGAN José Fernando,MATTIUZ Ben-Hur,ROSSI JúNIOR Oswaldo Durival
Ciência e Tecnologia de Alimentos , 2001,
Abstract: Este trabalho foi conduzido para verificar o efeito do tamanho do corte, 2,5 x 2,5cm (corte 1) e 2,5 x 5,0cm (corte 2), e da temperatura de armazenamento (3, 6 e 9oC), na velocidade da modifica o da atmosfera ambiente e nas características químicas de mam es do grupo `Formosa' minimamente processados e embalados em copos plásticos (500ml). A concentra o de CO2 no interior destes copos aumentou 2 a 3 vezes, durante as primeiras 6 horas após o corte, para depois diminuir e se estabilizar. Esta concentra o aumentou com o aumento da temperatura de armazenamento. A umidade dos peda os diminuiu consideravelmente nos dois primeiros dias, e a temperatura que melhor conservou a umidade foi a de 6oC. A acidez total titulável foi menor no corte 2, com as maiores redu es a 6 e 9oC. Os teores de sólidos solúveis totais n o variaram entre os tratamentos, e os cuidados higiênicos adotados durante o processamento permitiram a obten o de produtos com baixa contagem microbiana, 103UFC.g-1 nos peda os armazenados a 9oC após sete dias, e com boa manuten o da qualidade sensorial das mesmas. Estes resultados permitem indicar o mam o `Formosa' para a produ o de produtos minimamente processados, na forma de peda os, com conserva o refrigerada (3 e 6oC ) por um período de 7 dias.
Psychosocial Factors Involved in Absenteeism—A Qualitative Analysis in a Brazilian Context  [PDF]
Alessandro Vinicius de Paula, Ximena Christina de Carvalho Oliveira, Ana Alice Vilas Boas, Júlia de Moura Martins Guimar?es
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.58092
Abstract:

Work is a fundamental activity for human beings not only because it provides the benefit of a wage but also because it allows the subject to draw primitive anxieties that are evoked only in the frame of human-work relations. In Brazilian context, removed workers are often victims of prejudice beyond the organization space, triggering feelings of weakness and uselessness. The absence from work may also jeopardize both physical and mental health. Thus, this study aims to understand the psychosocial factors (social support, affect, coping skills and perception of future and health status) involved in absenteeism and the process of withdrawing work and its consequences on people’s lives. A qualitative approach was chosen for gathering and analyzing data. Four workers from different professional categories participated in this qualitative study. It was observed that stop working brought serious implications for the lives of investigated subjects, who reported feelings of estrangement, fear, emptiness, depression, helplessness and dependence. The most frequent difficulties in relation to absenteeism refer to the part of the tie break of social and financial issues. The main strategy for dealing with problems arising from job withdraws was to seek social support from friends and family. Regarding plans and the prospective, they experienced a critical period (immobilization), requiring a process of (re)adapting to the new situation ahead. Given the above, it is noteworthy to understand that the consequences of absenteeism or temporary withdrawing of labor become a necessary measure to preserve physical and mental health; a task open to interventions of work and organizational psychology.

Reestrutura??o produtiva, reforma administrativa do estado e gest?o da educa??o
Carvalho, Elma Júlia Gon?alves de;
Educa??o & Sociedade , 2009, DOI: 10.1590/S0101-73302009000400011
Abstract: the relationship between the "new model" of enterprising management and the governmental management model or managerial model is identified. repercussions of the managerial model in the school's administrative organization are highlighted due to the fact that it consequently becomes characterized as democratic, participatory and decentralized. current research aims at making the reader aware of the need to reflect on the meaning of changes which have been experienced since the 1990s with regard to the manner school and education are managed.
Page 1 /454659
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.