Data/hora: 13/06/2024 12:27:13

Provedor de dados: 	64	
País: 	Brazil	
Título: 	Vegetable crops deformation assays for package height definition: a new approach	
Autores: 	Luengo,Rita de Fátima Alves; Calbo,Adonai Gimenez; Jacomino,Angelo Pedro.	
Data: 	2008-02-01	
Ano: 	2008	
Palavras-chave: 	Brassica oleraceae acephala; Capsicum annuum; Lactuca sativa; Pile height; Post-harvest.	
Resumo: 	In the present work one determined the threshold pile height below which cracking and other deformations do not occur in products with low apparent density such as lettuce, collard greens and bell pepper. Initially the threshold pile height was sought applying decreasing compression stresses equivalent to pile loads of 160, 120 and 80 cm, with four replicates in four hour assays. The safe threshold pile height which protects the products against cracking rupture in these three commodities were of 80 cm. In a complementary study, plastic and elastic deformations induced by this safe pile threshold height were measured. The irreversible deformation, plastic deformation component, were lower in bell pepper (3.8 %), medium in lettuce (4.23 %) and had the higher values in collard greens (10.2 %). The reversible deformations, the elastic component, was also the lower in bell pepper (4.14 %), medium in lettuce (7.41 %) and the higher in collard greens (8.17 %). Considering these modest plastic deformations, the safe pile threshold heights were accepted and the safe package heights were defined as the pile threshold height multiplied by a factor of 0.5. This safety factor incorporates protection against accelerations of impact and vibration which occur during handling and transportation, as it was previously used for the development of packages for compact fruits and vegetables with higher apparent density. According to the method used the maximum package height should be of 40 cm, for the low density model products of this study.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000100026	
Editor: 	Editora da Universidade Federal de Lavras	
Relação: 	10.1590/S1413-70542008000100026	
Formato: 	text/html	
Fonte: 	Ciência e Agrotecnologia  v.32 n.1 2008	
Fonte: 	info:eu-repo/semantics/openAccess