FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1539837072> ?p ?o ?g. }

• W1539837072 abstract "Italy is the second hazelnut producer country in the world, and more than 30% of the Italian cultivated area is located in Campania (South Italy). Usually hazelnuts (Corylus avellana L.) are sold both in-shell and shelled. In-shell hazelnuts are mainly designed for fresh consumption while shelled ones, are employed, as raw material, in confectionary and bakery food companies. Furthermore, due to its beneficial health attributes, hazelnuts have also been valued by cosmetic and pharmaceutical companies. Nuts are source of bioactive compounds such as plant proteins, essential minerals, vitamin E, unsaturated fatty acids, and polyphenols.Fruit quality has gained a key relevance in the processing industry, since companies are attempting to find useful methods to better characterize their own products. However, hazelnut is still little studied and till now many questions on nut quality improvement need to be still addressed. The general aim of this thesis was to increase the knowledge of factors and techniques that can positively affect hazelnut final quality. Therefore, the thesis was organized in three experiments.In the first experiment the effect of foliar fertilization with nitrogen and micronutrients on yield, nut quality, and kernel composition was evaluated. Thirty ten-year-old hazelnut trees, cv. 'Mortarella' randomly distributed in an private orchard located in Caserta, Southern Italy, were selected. The foliar spray treatments compared were: control (C) (only water), Coryl-Dry 2.5% (CD) (7% CH4N2O, 2% N organic, 0.5% B H3BO3, 0.5% Zn EDTA, 0.05% Fe EDTA) and boron 300ppm (B) (H3BO3). Spraying applications were carried out on mid April, mid May and mid June in 2011, 2012 and 2013. In general, foliar fertilization affected vegetative growth. CD trees showed a higher shoots extension growth, total leaf area, and trunk cross-sectional area than control trees in 2012, while there were no significant effects on yield. Foliar spray significantly improved kernel weight and decreased the incidence of blanks by about 2% compared to control. Differences in fat, protein, and carbohydrate concentration were found in 2012 and 2013 among treatments. In CD and B trees, fat concentration increased from about 60% to 64%, whereas carbohydrate concentration tended to decrease from 23.4% to 19-15.5% compared to control. The total polyphenols content was affected by foliar fertilization in 2013, CD and B trees had a higher values (respectively 153.4 and 147.7 mg/kg) than the control (128.7 mg/kg). Foliar fertilization improved oil composition of the kernels, but fatty acid composition responded differently to nutrients spray. Oleic acid concentration was promoted while palmitic acid concentration was reduced in fertilized plants compared to control trees. Furthermore, CD and B trees were characterized by an increase in the ratio of unsaturated/saturated fatty acids compared to untreated trees. Finally, foliar spray improved lipid stability compared to control, due to higher total polyphenol concentration.The second experiment aimed to study the intra-canopy variability in kernel growth and composition. In August 2013, ten 10-year-old hazelnut trees were selected in the same orchard of the first experiment. Tree canopies were divided in six horizontal layers. Each layer was equally divided into inner zone and outer zone, obtaining 12 canopy sectors. The PAR distribution in each canopy sector was measured on 5 September at nine times of the day (hourly measurements, from 10:30 am to 18:30 pm), by horizontally placing a ceptometer in five different points inside each canopy sector. On 24 September, when fruits were physiologically ripen, five infructescences were separately harvested in each canopy sector of sampled trees, and their the original position (height from the ground) was measured. A sample of fifty nuts per sector was used for qualitative analysis. Canopy position affected kernel fresh and dry weight. Height above the ground and kernel dry and fresh weight resulted linearly and positively related. Fat percentage was found to be similar for all the kernel samples harvested at different heights below 2.00 m, averaging 64%, whereas it decreased linearly at 60% in apical position samples (above 2.0 m). On the contrary, protein and ashes content on percentage increased progressively from lower to higher zone. Furthermore, height above the ground strongly affected fatty acid composition The intermediate productive layer showed higher quantity of oleic acid than bottom and top canopy layer. Among the fatty acid, stearic acid and γ linolenic acid resulted positively related to height above the ground, while palmitoleic acid and linoleic acid were negatively related to it. Finally, the extinction coefficient K232 decreased from 1.6 to 1.35 proceeding from the lowest to the highest canopy position.In the third experiment, the feasibility of NIR spectroscopy in estimating the level of lipid oxidation in unshelled and shelled hazelnuts was investigated. Twenty 5-kg samples of unshelled ‘Mortarella’ hazelnuts, harvested between 2008 and 2012, were stored in a warehouse at room temperature until the beginning of the experiments in January 2013. Five randomly selected whole hazelnuts per batches were measured by NIR spectroscopy on two opposite sides, first as a whole kernel and then as a shelled kernel. After scanning, kernel oil was extracted and fat oxidation was determined. The best results, expressed as coefficient of determination, were obtained for the K232 extinction coefficient for both unshelled (R2=0.79) and shelled (R2=0.85) hazelnuts and also low values for the RMSECV were obtained. The possibility to use the K232 variable as predictor of lipid oxidation in both unshelled and shelled hazelnuts is a commercially valuable result." @default.
• W1539837072 created "2016-06-24" @default.
• W1539837072 creator A5009917314 @default.
• W1539837072 date "2014-03-31" @default.
• W1539837072 modified "2023-09-26" @default.
• W1539837072 title "Improving hazelnut quality at harvest and non-destructive assessment of post-harvest nut quality" @default.
• W1539837072 hasPublicationYear "2014" @default.
• W1539837072 type Work @default.
• W1539837072 sameAs 1539837072 @default.
• W1539837072 citedByCount "1" @default.
• W1539837072 countsByYear W15398370722018 @default.
• W1539837072 crossrefType "journal-article" @default.
• W1539837072 hasAuthorship W1539837072A5009917314 @default.
• W1539837072 hasConcept C127413603 @default.
• W1539837072 hasConcept C144027150 @default.
• W1539837072 hasConcept C14522933 @default.
• W1539837072 hasConcept C150903083 @default.
• W1539837072 hasConcept C178790620 @default.
• W1539837072 hasConcept C185592680 @default.
• W1539837072 hasConcept C206391251 @default.
• W1539837072 hasConcept C2780753983 @default.
• W1539837072 hasConcept C31903555 @default.
• W1539837072 hasConcept C33923547 @default.
• W1539837072 hasConcept C37621935 @default.
• W1539837072 hasConcept C39432304 @default.
• W1539837072 hasConcept C66938386 @default.
• W1539837072 hasConcept C86803240 @default.
• W1539837072 hasConceptScore W1539837072C127413603 @default.
• W1539837072 hasConceptScore W1539837072C144027150 @default.
• W1539837072 hasConceptScore W1539837072C14522933 @default.
• W1539837072 hasConceptScore W1539837072C150903083 @default.
• W1539837072 hasConceptScore W1539837072C178790620 @default.
• W1539837072 hasConceptScore W1539837072C185592680 @default.
• W1539837072 hasConceptScore W1539837072C206391251 @default.
• W1539837072 hasConceptScore W1539837072C2780753983 @default.
• W1539837072 hasConceptScore W1539837072C31903555 @default.
• W1539837072 hasConceptScore W1539837072C33923547 @default.
• W1539837072 hasConceptScore W1539837072C37621935 @default.
• W1539837072 hasConceptScore W1539837072C39432304 @default.
• W1539837072 hasConceptScore W1539837072C66938386 @default.
• W1539837072 hasConceptScore W1539837072C86803240 @default.
• W1539837072 hasLocation W15398370721 @default.
• W1539837072 hasOpenAccess W1539837072 @default.
• W1539837072 hasPrimaryLocation W15398370721 @default.
• W1539837072 hasRelatedWork W2008615663 @default.
• W1539837072 hasRelatedWork W2039150377 @default.
• W1539837072 hasRelatedWork W2045602448 @default.
• W1539837072 hasRelatedWork W2121291468 @default.
• W1539837072 hasRelatedWork W2127266515 @default.
• W1539837072 hasRelatedWork W2187529089 @default.
• W1539837072 hasRelatedWork W2247669064 @default.
• W1539837072 hasRelatedWork W2316614270 @default.
• W1539837072 hasRelatedWork W2320348014 @default.
• W1539837072 hasRelatedWork W2326281582 @default.
• W1539837072 hasRelatedWork W2347882948 @default.
• W1539837072 hasRelatedWork W2371647279 @default.
• W1539837072 hasRelatedWork W2410539907 @default.
• W1539837072 hasRelatedWork W2509087421 @default.
• W1539837072 hasRelatedWork W2582029579 @default.
• W1539837072 hasRelatedWork W2590737392 @default.
• W1539837072 hasRelatedWork W3123475778 @default.
• W1539837072 hasRelatedWork W751204025 @default.
• W1539837072 hasRelatedWork W2184484996 @default.
• W1539837072 hasRelatedWork W2186402261 @default.
• W1539837072 isParatext "false" @default.
• W1539837072 isRetracted "false" @default.
• W1539837072 magId "1539837072" @default.
• W1539837072 workType "article" @default.