scholarly journals Fortified Cold-Pressed Oils: The Effect on Sensory Quality and Functional Properties

Separations ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 55
Author(s):  
Alexandra Tauferova ◽  
Dani Dordevic ◽  
Simona Jancikova ◽  
Bohuslava Tremlova ◽  
Piotr Kulawik
Keyword(s):  
Thermal Treatment ◽  
Sensory Quality ◽  
Carotenoid Content ◽  
Seed Oils ◽  
Thermal Treatments ◽  
Oxidation Degree ◽  
Repeated Heating ◽  
Sesame Seeds ◽  
Oil Blends ◽  
Cold Pressed

The aim of this study was to monitor sensory quality, stability, selected nutritionally interesting properties and their changes in cold-pressed oil blends after fortification with chia and sesame seeds and seed oils during repeated thermal treatments. Rapeseed (cv. Sidney) and sunflower (cv. Velox) seeds from the Czech Republic were used to produce cold-pressed oils, which were fortified with chia and sesame seeds and seed oils in the concentrations of 1% and 5%. In all oil blends, sensory evaluation (quantitative descriptive analysis and hedonic analysis) and chemical analyses (oxidation degree, hydrolytic stability, chlorophyll and carotenoid content) were carried out in order to perform separation of samples degraded by thermal treatment. Assessors representing consumers were able to differentiate between individual thermal treatments from the viewpoint of pleasantness. Interestingly, the overall pleasantness of all fortified oil samples was still acceptable until the second thermal treatment. On the other hand, the results of the study emphasized the problematic oxidation degree of cold-pressed oil blends. The fortification of cold-pressed oils with chia and sesame seeds and oils did not unambiguously lead to better stability during thermal treatment. The application of elevated temperatures during the culinary use of these types of products should be limited to only one thermal treatment since sensory and chemical changes occur after repeated heating.

scholarly journals Application of a Prototype Thermoplastic Treatment Line in Order to Design a Thermal Treatment Process of Forgings with the Use of the Heat from the Forging Process

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2441
Author(s):  
Marek Hawryluk ◽  
Zbigniew Gronostajski ◽  
Maciej Zwierzchowski ◽  
Paweł Jabłoński ◽  
Artur Barełkowski ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Production Costs ◽  
Thermal Treatments ◽  
Controlled Cooling ◽  
Repeated Heating ◽  
Forging Process ◽  
Motor Industry ◽  
Energy Consuming ◽  
Time And Energy

The global production of die forgings is an important branch of the motor industry for obvious reasons, resulting from the very good mechanical properties of the forged products. The expectations of the recipients, beside the implementation of the forging process, include also a range of supplementary procedures, such as finishing treatment including shot blasting, thermal treatment, and machining, in order to ensure the proper quality of the provided semi-product or the ready detail for the assembly line. Especially important in the aspect of the operational properties of the products is the thermal treatment of the forgings, which can be implemented in many variants, depending on the expected results. Unfortunately, a treatment of this type, realized separately after the forging process, is very time and energy-consuming; additionally, it significantly raises the production costs due to the increased energy consumption resulting from the necessity of repeated heating of the forgings for such thermal treatment. The article reviews the most frequently applied (separately, after the forging process) thermal treatments for die forgings together with the devices/lines assigned for them, as well as presents an alternative (thermoplastic) method of forging production with the use of the forging heat. The paper also presents a prototype semi-industrial controlled cooling line developed by the authors, which allows the development of the assumed heat treatment of forgings directly after forging with the use of forging heat, together with sample results of conducted tests.

scholarly journals A multilevel investigation supported by multivariate analysis for tomato product formulation

2021 ◽  
Author(s):  
Fatma Boukid ◽  
Elena Curti ◽  
Agoura Diantom ◽  
Eleonora Carini ◽  
Elena Vittadini
Keyword(s):  
Thermal Treatment ◽  
Color Change ◽  
Water Molecules ◽  
Thermal Treatments ◽  
Industrial Processing ◽  
H Nmr ◽  
Mobile Populations ◽  
Product Formulation ◽  
Tomato Product ◽  
The Impact

AbstractIndustrial processing of tomato includes its cutting and mincing, thermal treatments, and the addition of ingredients, which might induce changes in physicochemical properties of the final products. In this frame, the impact of texturing/thickening [xanthan gum (X) or potato fiber (F)] on the macroscopic, mesoscopic and molecular properties of tomato double concentrate (TDC) was investigated to determine if F can efficiently substitute X, in association with small solutes (sugar and salt) and thermal treatment (cold and hot). At a macroscopic level, multivariate statistics (MANOVA) underlined that color change (ΔE) was increased by X and F addition contrary to heating and the addition of salt and sugar. MANOVA revealed that texture was greatly enhanced through the use of F over X. 1H NMR molecular mobility changes were more controlled by texturing agents (F and X) than thermal treatment and small solutes. Particularly F increased the more rigid population indicating stronger interaction with water molecules resulting in shear-thinning flow. However, adding X contributed into the increase of the dynamic and mobile populations. Therefore, F can be a valid “clean label” substitute of X in modulating tomato products properties.

Influence of filtering of cold pressed berry seed oils on their antioxidant profile and quality characteristics

2011 ◽  
Vol 127 (4) ◽  
pp. 1848-1855 ◽  
Author(s):  
V. Van Hoed ◽  
I. Barbouche ◽  
N. De Clercq ◽  
K. Dewettinck ◽  
M. Slah ◽  
...  
Keyword(s):  
Quality Characteristics ◽  
Seed Oils ◽  
Antioxidant Profile ◽  
Cold Pressed

Quality assessment of cold-pressed strawberry, raspberry and blackberry seed oils intended for cosmetic purposes.

2021 ◽  
Vol 20 (2) ◽  
pp. 127-133
Author(s):  
Marianna Raczyk ◽  
◽  
Joanna Bryś ◽  
Rita Brzezińska ◽  
Ewa Ostrowska-Ligęza ◽  
...  
Keyword(s):  
Quality Assessment ◽  
Seed Oils ◽  
Cold Pressed

A review on bio-based graphene derived from biomass wastes

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9756-9785
Author(s):  
Muhammad Taqi-udeen Safian ◽  
Umirah Syafiqah Haron ◽  
Mohamad Nasir Mohamad Ibrahim
Keyword(s):  
Thermal Treatment ◽  
Thermal Degradation ◽  
Carbon Content ◽  
Polymer Chain ◽  
Complex Structure ◽  
Volatile Matter ◽  
Thermal Treatments ◽  
Biomass Waste

Biomass waste has become a new source for producing graphene due to its carbon-rich structure and renewable nature. In this paper, the research on the conversion of bio-based graphene from different biomass wastes is summarised and discussed. This paper reviews the methods for converting biomass to bio-based graphene. There are two approaches for thermal degradation of biomass: thermal exfoliation and carbon growth. The purpose of the thermal treatment is to increase the carbon content by removing volatile matter from the biomass polymer chain. Pre-treatments that help to break down the complex structure of the biomass are discussed; pre-treatments also remove impurities from the said biomass. Lastly, the characteristics of bio-based graphene produced from different biomass and thermal treatments are summarised.

scholarly journals Study on Properties of Waste Concrete Powder by Thermal Treatment and Application in Mortar

2020 ◽  
Vol 10 (3) ◽  
pp. 998 ◽  
Author(s):  
Yuwu Sui ◽  
Chuping Ou ◽  
Shu Liu ◽  
Jinshuai Zhang ◽  
Qingbo Tian
Keyword(s):  
Particle Size ◽  
Thermal Treatment ◽  
Treatment Process ◽  
Activity Index ◽  
Recycled Aggregate ◽  
Thermal Treatments ◽  
High Quality ◽  
Active Elements ◽  
Waste Concrete ◽  
Mechanical Strengths

Waste concrete must be crushed, screened, and ground in order to produce high-quality recycled aggregate. In this treatment process, 15–30% waste concrete powder (<0.125 mm) can be generated. Hydration activity and the reuse of waste concrete powders (WCPs) were studied in this work, and the results illustrated that the particle size changed after a series of thermal treatments at temperatures from 400 ℃ to 800 ℃. The particle size of waste concrete powder decreased by 700 ℃ thermal treatment, and by 600 ℃ thermal treatment, it increased. More active elements appeared in WCP heated by 800 ℃. Nevertheless, the activity index (AI) of WCP, measured by the ratio of mechanical strengths between mortar with a 30% replacement of the cement with WCP and normal mortar without WCP, indicated that the WCP by 700 ℃ thermal treatment had an optimal AI value, which meant WCP treated at 700 ℃ could be used in mortar or concrete as an admixture.

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