Temat: colorimetry - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Development of Blood Glucose Monitoring System using Image Processing and Machine Learning Techniques
Autorzy:: Thomas, Angel
Palekar, Sangeeta
Kalambe, Jayu
Tematy:: glucose
image processing
machine learning
colorimetry; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2077647.pdf Link otwiera się w nowym oknie
Opis:: Glucose concentration measurement is essential for diagnosis, monitoring and treatment of various medical conditions like diabetes mellitus, hypoglycemia, etc. This paper presents a novel image-processing and machine learning based approach for glucose concentration measurement. Experimentation based on Glucose oxidase - peroxidase (GOD/POD) method has been performed to create the database. Glucose in the sample reacts with the reagent wherein the concentration of glucose is detected using colorimetric principle. Colour intensity thus produced, is proportional to the glucose concentration and varies at different levels. Existing clinical chemistry analyzers use spectrophotometry to estimate the glucose level of the sample. Instead, this developed system uses simplified hardware arrangement and estimates glucose concentration by capturing the image of the sample. After further processing, its Saturation (S) and Luminance (Y) values are extracted from the captured image. Linear regression based machine learning algorithm is used for training the dataset consists of saturation and luminance values of images at different concentration levels. Integration of machine learning provides the benefit of improved accuracy and predictability in determining glucose level. The detection of glucose concentrations in the range of 10–400 mg/dl has been evaluated. The results of the developed system were verified with the currently used spectrophotometry based Trace40 clinical chemistry analyzer. The deviation of the estimated values from the actual values was found to be around 2-3%.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of Wall Salinity in the Selection of Renovation Plaster Systems
Autorzy:: Panuś, Arkadiusz
Tematy:: salinity analysis
colorimetry
salty wall
restoration plaster
ion chromatography; Pokaż więcej
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:: https://bibliotekanauki.pl/articles/2069747.pdf Link otwiera się w nowym oknie
Opis:: This article presents issues related to assessing the degree of wall salinity to select plaster systems for renovations of damp building walls. The most commonly used salt concentration tests pose many difficulties. If used uncritically, they risk failing to select the right system or its incorrect make. The accuracy of the colorimetric method for testing chloride, nitrate, and sulphate content was analysed to exemplify the magnitude of the problem. Both multi-salt solutions of known concentrations and unknown composition extracted from drillings in the walls of a historical facility were examined. A comparative methodology using ion chromatography as a standard was employed in the research. The analytical methods and the selected modules of the „Statistica” software were used to analyse data and present the results. The colorimetric method has been shown to distort salt concentration values, posing a risk of unsuccessful repair work on high-salinity walls. A method for determining the correction reducing the measurement error has been proposed. The factors affecting the error were also mentioned. Attention has also been drawn to the resolution and application of a method with a correct concentration range intended to improve work efficiency and optimize the costs incurred in renovating the salty wall.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Evaluation of Insulation against Contact Heat, Radiant Heat and Sensory Comfort of Basalt Fabric-Based Composites with Parylene C Coating
Autorzy:: Nosal, Andrzej
Miśkiewicz, Pamela
Tokarska, Magdalena
Puszkarz, Adam K.
Wydawca:: Sciendo
Cytata wydawnicza:: Tokarska, M., Miśkiewicz, P., Puszkarz, A.K.. & Nosal, A. Evaluation of Insulation against Contact Heat, Radiant Heat and Sensory Comfort of Basalt Fabric-Based Composites with Parylene C Coating. Fibres & Textiles in Eastern Europe, 2023, Sciendo, vol. 31 no. 5, pp. 99-108. https://doi.org/10.2478/ftee-2023-0050
Opis:: The article concerns research on using Parylene C coating on basalt fabric-based composites with potential use in protective clothing to improve their insulation against contact heat and radiant heat, as well as the sensory comfort of the user. The outcomes of the contact heat method showed that applying Parylene C coating improved the thermal insulation of all tested composites. Two of them achieved the first efficiency level of protection. The results of the radiant heat method presented that using the Parylene C coating did not cause changes in the thermal insulation against heat radiation of all tested materials; the radiant heat transfer index reached values in the range of 12.4 - 12.9 s. X-ray tomography (micro-CT) allowed for identifying breaks/snaps in basalt fibers irritating the user’s skin in direct contact with the composite. Micro-CT results also showed that using Parylene C coating eliminated the effect of skin irritation and increased the usability of basalt fabrics in clothing.
These studies were financed from funds assigned from: I42/501-4-42-1-1 statutory activity by Lodz University of Technology. Institute of Material Science of Textiles and Polymer Composites. Poland; the “Innovative Textiles 2020+” no. RPLD.01.01.00-10-0002/17-00 investment project within the Regional Operational Programme for Łódzkie 2014-2020.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 4.

Tytuł:: Evaluation of Insulation against Contact Heat, Radiant Heat and Sensory Comfort of Basalt Fabric-Based Composites with Parylene C Coating
Autorzy:: Tokarska, Magdalena
Miśkiewicz, Pamela
Puszkarz, Adam K.
Nosal, Andrzej
Tematy:: basalt fabric
Parylene C
thermal protection
micro-CT
colorimetry; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:: https://bibliotekanauki.pl/articles/59115059.pdf Link otwiera się w nowym oknie
Opis:: The article concerns research on using Parylene C coating on basalt fabric-based composites with potential use in protective clothing to improve their insulation against contact heat and radiant heat, as well as the sensory comfort of the user. The outcomes of the contact heat method showed that applying Parylene C coating improved the thermal insulation of all tested composites. Two of them achieved the first efficiency level of protection. The results of the radiant heat method presented that using the Parylene C coating did not cause changes in the thermal insulation against heat radiation of all tested materials; the radiant heat transfer index reached values in the range of 12.4 - 12.9 s. X-ray tomography (micro-CT) allowed for identifying breaks/snaps in basalt fibers irritating the user’s skin in direct contact with the composite. Micro-CT results also showed that using Parylene C coating eliminated the effect of skin irritation and increased the usability of basalt fabrics in clothing.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Metody prognozowania zmiany położenia punktu chromatyczności światła emitowanego przez źródła LED w trakcie ich eksploatacji
Chromaticity shift prediction methods for white phosphor-converted LED
Autorzy:: Supronowicz, R.
Kowalska, J.
Tabaka, P.
Qian, C.
Fan, J.
Fryc, I.
Tematy:: kolorymetria
LED
rozkład widmowy
współrzędne chromatyczne
colorimetry
spectral power distributions
chromaticity shift; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Powiązania:: https://bibliotekanauki.pl/articles/267183.pdf Link otwiera się w nowym oknie
Opis:: W artykule zaprezentowano dwie metody prognozowania przesunięcia punktu chromatyczności Δu’v' zachodzącego w trakcie eksploatacji źródeł LED. Zmierzone w trakcie eksploatacji LEDa rozkłady widmowe mocy promienistej, zostały użyte w metodzie prognozowania bazującej na modelowaniu rozkładu mocy promienistej oraz metodzie regresji nieliniowej opierającej się na wartości współrzędnych położenia punktu chromatyczności u',v'. Zamieszczono porównanie wyników predykcji zmian położenia punktu chromatyczności wybranymi metodami. W celu weryfikacji dokładności wyników uzyskiwanych przy użyciu obydwu modeli przeprowadzono predykcję wartości Δu’v' dla czasu eksploatacji LEDa wynoszącego 9200 h. Wartości otrzymane przy użyciu nieliniowej regresji zmiany u',v' charakteryzują się wyższą dokładnością od uzyskanych modelowaniem rozkładu widmowego LED.
The chromaticity shift Δu'v in white LEDs are occurring during the exploitation of this type of light sources. The spectral power distributions measured during LED exploitation can be used for calculation of chromaticity shift. Due to long LED lifetime is important to have mathematical methods which could predict their chromaticity shift. The article presents the method of white LED chromaticity shift prediction. The method was based on nonlinear regression of chromaticity coordinates u'v' by R software. For compaction was taken chromaticity shift prediction by modeling the spectral power distribution of LEDs described in the paper Qian C.; Fan J.; Fan X.; Zhang G.: “Prediction of lumen depreciation and color shift for phosphor-converted white light-emitting diodes based on a spectral power distribution”. The chromaticity shift values obtained using non-linear regression of u'v' are given with higher accuracy than obtained by modeling the spectral power distribution of LEDs. It is worth noting that methods of chromaticity shift prediction can be also used to determine the durability of LED’s luminous flux, color rendering and efficacy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Assessment of color change of fabrics using the DigiEye device
Autorzy:: Miśkiewicz, Pamela
Tematy:: change of color in textiles
color in textiles
colorimetry
device DigiEye
fabric; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1166064.pdf Link otwiera się w nowym oknie
Opis:: In the textile industry a very important feature of materials intended for clothing products is their color. This feature is assessed by each user in a subjective way, however the color of a clothing product is an aesthetic feature that is of great importance during product manufacture. The article presents an innovative device for assessing the color change of DigiEye. The device was used to compare and evaluate the color change of fabrics before the washing process and after 5 washes.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Kamienie milowe w chemii klinicznej
Milestones in clinical chemistry
Autorzy:: Klimasz, K.
Tomasik, P. J.
Tematy:: chemia kliniczna
glukoza
białko
enzymy
kolorymetria
clinical chemistry
glucose
protein
enzymes
colorimetry; Pokaż więcej
Wydawca:: Polskie Towarzystwo Chemiczne
Powiązania:: https://bibliotekanauki.pl/articles/172762.pdf Link otwiera się w nowym oknie
Opis:: Clinical chemistry is the science on the border of the two disciplines: medicine and chemistry. It is defined as the application of the chemistry in the study of biological samples in order to diagnose, treat, cure diseases as well as in monitoring and prognosis [1]. Development of clinical chemistry is dated on the 19th century. Biuret test, and a method for detection of sugar in the urine were then described, also blood gases were extracted [13, 17]. In the mid of 19th century blood could be analyzed for the presence of potassium, sodium, phosphorus and calcium [31]. In the second half of 19th century Duboscq built first colorimeter. This model was widely adapted in laboratories and was in use till the 20-ties of 20th century [44]. Colorimetry also became the most popular technique in the clinical chemistry. In the 80ties of 19th century was developed a method for estimating the concentration of creatinine and detection of bilirubin [36, 39]. Increasing number of available laboratory tests resulted in the separation laboratory diagnostic as a distinguish branch of science. At the beginning of 20th century has been introduced quantitative analytical methods for determination of ammonia, urea, creatinine, cholesterol, uric acid, nitrogen, phosphorus, and chloride in biological fluids as well as measurements of blood gases. In 1930 was introduced clinical enzymology with the first method for assessing the activity of alkaline phosphatase. In the mid of 20th century in the medical laboratories routinely were measured amylase, lipase, acid and alkaline phosphatase, phosphocreatine kinase, alanine and asparagine aminotransferases [78, 79]. Development of electrical engineering and computing resulted with intensive development of laboratory instruments. First automated spectrophotometer was invented in 1957 (Autoanalyzer, Technicon company). In 1970, Automatic Clinical Analyzer f. Du Pont was able to perform determinations in any configurations not as so far in the series [99].
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Oznaczanie mikrogramowych zawartości arsenu w żywności i przedmiotach użytku
Oboznachanie mikrogrammovykh kolichestv arsina v pishhevykh produktakh i predmetakh shirokogo primenenija
Determination of minute amounts of arsene in foods
Autorzy:: Szymczak, J.
Zechalko, A.
Tematy:: arsen
oznaczanie
kalorymetria
zawartosc arsenu
zywnosc
dawki dopuszczalne
arsenic
determination
colorimetry
arsenic content
food
acceptable dose; Pokaż więcej
Wydawca:: Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Powiązania:: https://bibliotekanauki.pl/articles/875577.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Kolorymetryczne oznaczanie molibdenu w żywności za pomocą rodanku
Kolorimetricheskoe opredelenie molibdena v poshhevykh produktakh pri pomoshhi rodanata
Colorimetric determination of molybdenum in foods by means of thiocyanate
Autorzy:: Bernstein, I.
Tematy:: molibden
zywnosc
oznaczanie
metody oznaczania
kolorymetria
metody rodankowe
molybdenum
food
determination
determination method
colorimetry
thiocyanate method; Pokaż więcej
Wydawca:: Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Powiązania:: https://bibliotekanauki.pl/articles/875790.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Zastosowanie modelu CIE Lab w badaniach barwy lotnych popiołów
Application of the CIE Lab model in research of fly ash colour
Autorzy:: Molenda, J.
Wrona, M.
Siwiec, E.
Tematy:: lotny popiół
model CIE Lab
barwa chromatyczna
jasność
kolorymetria
fly ash
CIE Lab model
chromatic colour
lightness
colorimetry; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/257179.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono wyniki pomiarów kolorymetrycznych próbek lotnych popiołów powstających podczas spalania węgla w kotłach energetyki zawodowej. Pomiary kolorymetryczne zrealizowano za pomocą spektrofotometru UV-Vis wyposażonego w sferę integrującą do rejestracji promieniowania rozproszonego. Następnie na podstawie modelu CIE Lab dokonano obliczeń parametrów L, a, b opisujących jasność próbek oraz barwy chromatyczne. Stwierdzono liniową zależność pomiędzy jasnością a zawartością niewypalonego węgla w badanych próbkach, a tym samym potwierdzono możliwość oceny zawartości węgla w lotnych popiołach na podstawie badań kolorymetrycznych. Na wynik pomiaru w nieznaczny sposób wpływa obecność w próbce substancji o zabarwieniu czerwonym, opisywanym parametrem a w modelu CIE Lab.
The article presents the results of colorimetric measurements of samples of fly ash, originating during coal combustion in professional power boilers. Colorimetric measurements were realised using a UV-Vis spectrophotometer, equipped with an integrating sphere for the scattered radiation registration. Then, based on the CIE Lab model, the calculations of the L, a, b parameters describing the brightness of samples and chromatic colours were performed. A linear correlation was found between brightness and unburned coal content in research samples, which confirmed the possibility of the assessment of coal content in fly ash, based on colorimetric research. Measurement results are slightly influenced by the presence in the sample of a substance of a red colour, described by a parameter in the Lab model.
Dostawca treści:: Biblioteka Nauki

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