Assessing the microstructural and rheological changes induced by food additives on potato puree

The effects of agar, alginate, lecithin and glycerol on the rheological properties of commercial potato puree were investigated and interpreted in terms of starch microstructural changes, and the applicability of the Cox-Merz rule was evaluated. Each additive was applied separately at two concentrations (0.5 and 1%). Microscopic observations revealed more swollen starch aggregations in lecithin and glycerol compared with those of potato puree and agar, consequently affecting the rheological properties of potato puree. All samples exhibited shear thinning non-Newtonian behaviour. Rheological measurements were strongly concentration dependent. At 0.5% concentration, additives exerted decreases in all the rheological properties of potato puree in the order of glycerol > alginate > lecithin > agar, while at 1% concentration, the order changed to glycerol > lecithin > alginate, whereas 1% agar behaved differently, increasing all rheological values. This study also showed that agar and alginate in addition to potato puree could be valuable and advantageous for further technological processes, such as 3D printing.Peer ReviewedPostprint (updated version

Pemanfaatan Bubur Buah Jambu Biji Putih dan Bubur Buah Pepaya dalam Pembuatan Fruit Leather

The study was purposed to get the best combination of white guava puree and papaya puree in the making fruit leather. The research used a Complete Randomized Design (CRD) with 5 treatments and 3 replications. The treatments were JP0 (90% white guava puree:10% papaya puree), JP1 (80% white guava puree:20% papaya puree), JP2 (70% white guava puree:30% papaya puree), JP3 (60% white guava puree:40% papaya puree) and JP4 (50% white guava puree:50% papaya puree). The data obtained were analyzed statistically using ANOVA and DNMRT at 5%. The research showed that white guava puree and papaya puree significant on water content, ash content, degree of acidity (pH), crude fiber content, sensory evaluation for colour, flavour, texture, and overall assessment, but non significant on total sugar content and sensory evaluation for taste of fruit leather. The best treatment of fruit leather from this research is JP4 which have water content 15.99%, ash content 0.80%, degree of acidity (pH) 4.48, crude fiber content 3.49%, total sugar content 55.07%, orange colour (score 1.97), papaya flavour (score 2.27), sweetness taste (score 3.67), the texture was springy (score 3.80), and overall assesment of fruit leather was preferred by the panelist

Pemanfaatan Buah Pepaya (Carica Papaya L.,) dan Tomat (Lycopersicum Esculentum Mill.,) dalam Pembuatan Fruit Leather

This study aimed was to got exact formulation of combination of papaya fruit puree and tomato puree in the manufacture of fruit leather. This study used a completely randomized design (CRD) with 5 treatments and 3 replications. The treatments used against fruit leather were PT1 (papaya fruit puree 65%, tomato puree 35%), PT2 (papaya fruit puree 55%, tomato puree 45%), PT3 (papaya fruit puree 50%, tomato puree 50%), PT4 (45% papaya fruit puree, tomato puree 55%) and PT5 (35% papaya fruit puree, tomato puree 65%). Data were analyzed statistically using ANOVA and DNMRT at 5% level. The results showed that the use of papaya fruit puree and tomato puree significantly effect on water content, ash content, acidity (pH), fiber content, total sugar content and sensory analysis. Fruit leather chosen from the results of this study was fruit leather treatment PT2 which has moisture content 11,86%, ash content 1,03%, degree of acidity 4,39, fiber content 3,12%, levels total sugar 36,45%, reddish orange color, flavor slightly fruity papaya and tomatoes, slightly sour taste, chewy texture and overall assessment fruit leather preferred by the panelists

Penambahan Buah Nanasdalam Pembuatanvelva Wortel

The purpose of this research was to get the best formulationof velvacarrot with additional pineapple. This research was used Completely Randomized Design (CRD) with five treatments and four replication which followed by Duncan's New Multiple Range Test (DMNRT) atlevel of 5%. The treatments were WN1 (puree carrot 100%), WN2 (puree carrot 80% : puree pineapple 20%), WN3 (puree carrot 70% : puree pineapple 30%), WN4 (puree carrot 60% : puree pineapple 40%) and WN5 (puree carrot 50% : puree pineapple 50%). The results showed that the concentration of puree carrot and puree pineapple in making velvasignificantly affected to degrees of overrun, acidity (pH), melting time, crude fiber content, and assessment sensory (descriptive and hedonic). The best treatment of making velvawas WN5 with overrun 27.75%, pH 4.16, melting time 16.62 minutes, crude fiber content 1.29% and organoleptic scores of WN5are 3.04 (colour), 2.56 (flavour), 2.44 (taste), 3.52 (texture) and overall (2.77)

Impact of mechanical and microstructural properties of potato puree-food additive complexes on extrusion-based 3D printing

This paper studies the applicability of extrusion-based 3D printing for constructing novel shapes from potato puree and the effects of four additives (agar, alginate, lecithin, and glycerol) added separately at three concentrations (0.5, 1, 1.5%) on the internal strength, mechanical properties, microstructure, and color of potato puree.Postprint (updated version

Effect of storage on beta-carotene content in Mango var. Chokanan puree

This study was aimed to determine the effect of storage on the content of â-carotene in mango puree. Mango (Mangifera indica L.) from Chokanan variety was selected for this study. The â-carotene content at 0, 3, 6 and 24 days of storage were 4.74 ± 0.29 mg/100 g puree, 3.78 ± 0.21 mg/100 g puree, 3.42 ± 0.11 mg/100 g puree and 2.84 ± 0.55 mg/100 g puree respectively. â-Carotene content of mango puree was significantly different (P < 0.05) at different storage times. However, post-hoc test showed that the â-carotene content was significantly different (P < 0.05) between day 0 and day 24 of storage times. Storage at 5 C for more than 3 days reduced 20% of â-carotene content in mango puree. Prolong storage time of the puree for more than 24 days had reduced about 40% of â-carotene content in mango puree. The study indicated that â-carotene content in mango puree was significantly lost after 24 days of storage

Determination of chemical properties in ‘calçot’ (Allium cepa L.) by near infrared spectroscopy and multivariate calibration

‘Calçots’, the immature floral stems of second-year onion resprouts, are an economically important traditional crop in Catalonia (Spain). Classical approaches to evaluating the chemical properties of ‘calçots’ are time consuming and expensive; near-infrared spectroscopy (NIRS) may be faster and cheaper. We used NIRS to develop partial least square (PLS) models to predict dry matter, soluble solid content, titratable acidity, and ash content in cooked ‘calçots’. To guarantee the robustness of the models, calibration samples were grown and analyzed in a first season (2014–15) and validation samples in a second season (2015–16). NIRS on puree spectra estimated dry matter and soluble solid content with excellent accuracy (R2pred¿=¿0.953, 0.985 and RPD¿=¿4.571, 8.068, respectively). However, good estimation of titratable acidity and ash content required using ground dried puree spectra (R2pred¿=¿0.852, 0.820 and RPD¿=¿2.590, 1.987, respectively). NIRS can be a helpful tool for ‘calçots’ breeding and quality control.Peer ReviewedPostprint (author's final draft

Quality analysis of critical control points within the whole food chain and their impact on food quality, safety and health (QACCP)

The overall objective of the project was to optimise organic production and processing in order to improve food quality and increase health promoting aspects in consumer products. The approach was a chain analysis approach which addressed the link between farm and fork and backwards from fork to farm. The objectives were to test food authenticity on farm level and food quality and health in processing. The carrot was chosen as the model vegetable since it is common for the involved partners from industry and is processed for baby food; hence the results are relevant for other vegetables and organic food in general as well. - Identify and define critical and essential product quality parameters useful to optimise organic food quality - Compare products from different farming practices (conventional and within organic) - Performance of QACCP (Quality Analysis Critical Control Point, similar to HACCP methodology) - Test the impact of the food chain (focusing on processing techniques) on the product quality and safety - Test the impact of organic food on healt

Development of a New Method of Storage and Maximum Separation of Chlorophils From Chlorophylcontaining Vegetables at Reception of Healthfull Nanoproducts

The aim of the work is the development of a new way of deep processing of chlorophyll-containing vegetables that gives a possibility not only to preserve chlorophylls a and b and other biologically active substances (BAS) of raw materials, but also to transform hidden bound (inactive) forms of chlorophyll in the free easy-digestible form at getting steam-thermally processed semi-products and healthy food products in the nanoform.For achieving the aim, the complex effect of steam-thermal processing and mechanolysis at fine-dyspersed comminution using the new equipment was applied as an innovation for thermal processing and comminution.There was developed the new method of getting healthy products of chlorophyll-containing vegetables (broccoli, spinach, Brussels cabbage, green leguminous haricot bean), steam-thermally processed (by hot steam) in the steam-convectional stove and fine-dyspersed with high contents of chlorophylls and other BAS and prebiotics. The method is based on the complex effect of processes of thermodestruction, mechanodestruction and non-enzymatic catalysis on raw materials at fine-dyspersed comminution. It was demonstrated, that at steam thermal processing of chlorophyll-containing vegetables (CCV) in the steam-convectomat during 5 minutes, there takes place not only preservation of chlorophylls a and b, but more full separation (in 1,33…1,4 times) from the hidden (bound) form, comparing with fresh vegetables. There was elucidated the mechanism of this process. The more full extraction of hidden forms of β-carotene (2 times more than in fresh CCV) takes place in parallel.The essentially more effect of transforming hidden forms was revealed at fine-dyspersed comminution of steam-thermally processed CCV. It was demonstrated, that thermally processed nanoproducts of CCV contain 2…2,1 more chlorophylls a and b, 2,0…3,3 times more carotenoids in the bound form than fresh vegetables.The quality of obtained new types of fine-dyspersated steam-thermally processed green products as puree and soups-purees of CCV exceeds one of known analogues by contents of chlorophylls a and b, β-carotene and other BAS, which are in nanosize easy-digestible form.Using new types of fine-dyspersated purees of CCV, there was developed the new green line of healthy nanoproducts: soups-purees, nanodrinks, nanosorbets, sauces-dressings, sauces-deeps, ice-cream, snacks and so on. It was demonstrated, that new products exceed existing analogues by BAS content (chlorophylls, β-carotene, L-ascorbic acid, phenol compounds)