Erscheinungsdatum: 10/2009, Medium: Taschenbuch, Einband: Kartoniert / Broschiert, Titel: Developing an appropriate system for onion grading, Titelzusatz: Handling,save time and costs, decrease losses, Autor: Mostafa, Harby, Verlag: VDM Verlag, Sprache: Englisch, Rubrik: Umwelt // Landwirtschaft, Gartenbau, Seiten: 96, Informationen: Paperback, Gewicht: 159 gr, Verkäufer: averdo
Developing an appropriate system for onion grading ab 48.99 € als Taschenbuch: Handling save time and costs decrease losses. Aus dem Bereich: Bücher, Wissenschaft, Umweltwissenschaft,
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Developing an appropriate system for onion grading ab 48.99 EURO Handling save time and costs decrease losses
From a prospective point of view, the association between fruit and vegetable consumption and risk of ovarian cancer remains unclear. Therefore, the present study was to investigate the association between consumption of fruits and vegetables and risk of the development of epithelial ovarian cancer in a multi-center large scale cohort study. Special attention was paid to the evaluation of the impact of calibrating multi-center dietary data. High consumption of fruits and vegetables did not reduce the risk of developing ovarian cancer. There was suggestive indication for a positive association with risk of ovarian cancer among very low fruit and vegetable consumers. Also, data indicated an inverse association between a high consumption of garlic and onion vegetables and ovarian cancer risk. The calibration of dietary data was found to have a remarkable impact on absolute intake values. However, the impact on risk estimates was rather small. The study of the histologic subtype of the tumor in relation to fruit and vegetable consumption as well as the study of vegetable subgroup consumption and ovarian cancer risk warrants further investigation.
Onion (Allium cepa,L)is a crop of warm climate and it is grown worldwide. Manual grading of onion is a labor-consuming and tedious operation coming with many losses. Sizing is one of the most important operations affecting onion export. It determines the weight of standard sale package and simplifies the mechanization of different handling systems. Sizing also has an effect on heat transfer processes, since size-graded produce allows heat transfer uniformity during drying, cooling and freezing processes.The aim of this work was to develop an appropriate machine for sizing onions, reduce losses and reduce grading costs. Maximum sizing efficiency obtained was 94.9% at zero longitudinal angle and at a belt speed of (0.23 m/s), while it was 94.5% at 10o longitudinal angle for the same belt speed. The overall average of the sizing efficiency (94.33%) was recorded at 20o side angle and the highest grading capacity (1.72 t/h) was obtained at 10o side angle and 10o longitudinal angle. Total costs of grading the produce were 3.89 LE/t.(0.7 US$/t). This machine has the potential to size other crops like potatoes, tomatoes, apples and citrus fruits.
The research work was aimed at determining the dielectric properties of onions which was used to determine the sizes of refrigeration equipment to be used in other to achieve a determined storage temperature as obtained from literature, the components are coupled to a controlled atmosphere storage system whose storage area was developed using an old refrigerator which was adapted specifically for onion storage in a developing country like Nigeria.