Colorimeter based on color sensor

Snizhko, Dmytro; Sushko, O. A.; Reshetnyak, E. A.; Shtofel, Dmytro; Zyska, Tomasz; Smolarz, Andrzej; Mussabekov, Nazarbek; Kalizhanova, Aliya

doi:10.15199/48.2017.05.19

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…They use three major colour sensors to detect the light reflected from an object: red, green, and blue, which have the same sensitivity as human eye receptors. 99,100 Despite the fact that there are many other colour spaces for determining the colour of objects, the CIELAB colour space, also referred to as L*a*b* is the widely used when it comes to food because of its uniform colour distribution and colour perception that is closest to that of a single human eye. To properly measure all perceptible colours, CIELAB employs three colour values.…”

Section: Colour Analysismentioning

confidence: 99%

Comprehensive assessment of heat pump dryers for drying agricultural products

Loemba

Kichonge

Kivevele

2022

Energy Science & Engineering

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Fruits and vegetables are agricultural products that require preservation to enhance and protect shelf life, encapsulate natural flavour, and retain nutritional content. Globally, agricultural products are preserved by a range of means, the most prevalent of which is the heat pump dryer, which produces the best results even in unfavourable climatic conditions. Heat pump dryers come in different types and their performance varies depending on the type. This study aims to evaluate recently developed heat pump dryers based on key performance indicators, impacts on food colour and nutritional content, techno‐economic, exergoeconomic, and environmental issues associated with the development of heat pump dryers, which are underrepresented in most of the existing heat pump dryers' reviews. This study also discusses mathematical drying kinetic models, and regulation or policy aspects related to the development of heat pump dryers. In the present study, the results on performance analysis indicate that heat pump dryers examined were effective in reducing drying time and obtaining high coefficients of performance ranging from 1.94 to 5.338 and specific moisture extraction rate ranging from 0.156 to 9.25 kg/kWh, as well as significantly reducing energy consumption by up to 80%. The nutritional composition and colour results show that heat pump dryers maintain the maximum nutrient content while also improving colour. The expansion valve has the lowest exergoeconomic factor of all heat pump dryer components, whereas the compressor has the highest cost of exergy destruction in general, according to the results of exergoeconomic analysis. Techno‐economic analysis results demonstrated that most developed heat pump dryers have short payback periods ranging from 1.6 to 3.6 years. However, due to a lack of research in this field, the environmental implications of heat pump dryers are unknown. As per the findings of this study, future research in this field should focus on the design of simple and low‐energy heat pump dryers, life cycle, techno‐economic, and exergoeconomic assessments.

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Section: Colour Analysismentioning

confidence: 99%

Comprehensive assessment of heat pump dryers for drying agricultural products

Loemba

Kichonge

Kivevele

2022

Energy Science & Engineering

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“…The Optishade Style Italiano is a contemporary and underutilized colorimeter, with only one scientific study existing in the field of endodontics [39]. Equipped with red, green, and blue filters to approximate the human eye's spectrum, this colorimeter operates by capturing colors through processing the light reflection via said filters [40].…”

Section: Discussionmentioning

confidence: 99%

In Vitro Evaluation of Surface Roughness and Color Variation after Two Brushing Protocols with Toothpastes Containing Different Whitening Technologies

Lobito,

Colaço,

Costa

et al. 2024

Applied Sciences

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The aim was to evaluate the effect of different whitening toothpastes on the enamel surface roughness and color variation. Twenty-four molars were sectioned and divided into eight groups (n = 3) considering the following two factors under study: toothpaste type (Colgate® Total Original, Oral B® 3D White Luxe Perfection, Curaprox® Black is White, and Signal® White Now) and brushing protocol (short- and long-term). Surface roughness was examined by atomic force microscopy (AFM), and color change (ΔE) was measured using the CIE L*a*b* system. Data were statistically analyzed using comparative parametric tests at a 5% significance level. In the short-term protocol, only the Signal® White Now toothpaste increased surface roughness (p = 0.038) compared to the Colgate® Total Original group. No significant differences (p > 0.05) were observed in surface roughness in the long-term protocol. Regarding color variation, no statistically significant differences (p > 0.05) were observed in either protocol. Overall, the whitening toothpastes did not affect enamel surface roughness or color, except for Signal® White Now, which caused increased roughness in the short-term protocol. However, all toothpastes induced a visual change in color.

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“…The Optishade Style Italiano is a contemporary and underutilized colorimeter, with only one scientific study existing in the field of endodontics [33]. Equipped with red, green, and blue filters to approximate the human eye's spectrum, this colorimeter operates by capturing the color through the processing the light reflection via said filters [34].…”

Section: Discussionmentioning

confidence: 99%

In Vitro Evaluation of Surface Roughness and Color Variation after Two Brushing Protocols with Toothpastes Containing Different Whitening Technologies

Lobito,

Colaço,

Costa

et al. 2024

Preprint

View full text Add to dashboard Cite

The aim was to evaluate the effect of different whitening toothpastes on the enamel surface roughness and color variation. Twenty-four molars were sectioned and divided into eight groups (n = 3), considering the two factors under study: toothpaste type (Colgate® Total Original, Oral B® 3D White Luxe Perfection, Curaprox® Black is White, and Signal® White Now) and brushing protocol (short-term and a long-term). Surface roughness was examined by atomic force microscopy (AFM), and color change (ΔE) was measured using the CIE L*a*b* system. Data were statistically analyzed using comparative parametric tests at a 5% significance level. In the short-term protocol, only the Signal® White Now toothpaste increased surface roughness (p = 0.038) compared to the Colgate® Total Original group. No significant differences (p > 0.05) were observed in surface roughness in the long-term protocol. Regarding color variation, no statistically significant differences (p > 0.05) were observed in either protocol. Overall, the whitening toothpastes did not affect enamel surface roughness or color, except for Signal® White Now causing increased roughness in the short-term protocol. However, all toothpastes induced a visual change in color.

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Colorimeter based on color sensor

Cited by 7 publications

References 9 publications

Comprehensive assessment of heat pump dryers for drying agricultural products

Comprehensive assessment of heat pump dryers for drying agricultural products

In Vitro Evaluation of Surface Roughness and Color Variation after Two Brushing Protocols with Toothpastes Containing Different Whitening Technologies

In Vitro Evaluation of Surface Roughness and Color Variation after Two Brushing Protocols with Toothpastes Containing Different Whitening Technologies

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