The effect of the size of particles on optical and electrooptical properties of colloids

Vojtylov, V.V.; Петров, М. П.; Spartakov, A. A.; Trusov, A. A.

doi:10.1134/s0030400x13030272

Cited by 12 publications

(4 citation statements)

References 4 publications

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“…The dependence Δn = n solvent -n colloid on n solvent measured at a wavelength of 589.3 nm for 12% UCNP colloid solutions is presented in Fig. 1 n n > radii a ≈ λ, as was shown in [15], the refractive index of the colloid is essentially independent of particle concentration.…”

Section: As Follows From Expression (3) Ifmentioning

confidence: 89%

Determination of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals using spectroscopic refractometry

et al. 2015

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A method for measuring refractive index n of nanosize particles in the visible and near-IR spectral ranges is proposed. The method is based on comparing refractive index n colloid of a colloid solution of nanoparticles in several solvents with refractive indices n solvent of corresponding pure solvents and has an accuracy of ±2 × 10 -4 . Upconversion nanosize phosphors (UCNPs) are synthesized in the form of a β-NaYF 4 crystalline matrix doped with Yb 3+ , Er 3+ , and Tm 3+ rare earth ions. UCNPs have a doped core with a diameter of 40 ± 5 nm and undoped shell with a thickness of 3-5 nm. Synthesized nanocrystals possess intense photoluminescence in the blue, green, and red spectral ranges upon excitation by IR radiation with a wavelength of 977 nm. Using a spectroscopic refractometer, the dispersion of the refractive index of β-NaYF 4 /Yb 3+ /Er 3+ /Tm 3+ nanocrystals was measured for the first time in the spectral range of 450-1000 nm with an accuracy of ±2 × 10 -4 .

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Section: As Follows From Expression (3) Ifmentioning

confidence: 89%

Determination of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals using spectroscopic refractometry

et al. 2015

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“…Вольтамперна характеристика (ВАХ) являє собою залежність струму від величини та полярності при кладеної напруги [9]. Ця характеристика для овоче вих рідких фаз має нелінійний характер, що зумовлено електрохімічною взаємодією електролітів, що спричиняє зміну швидкості їх руху.…”

Section: товарознавча оцінка рослинної сировини за допомогою удосконаunclassified

“…Перевищення цих доз призводить до звикання організму, виникнення потреби в алкоголі та розвитку наркотичної залежності (алкоголізму) [5][6][7][8][9][10].…”

Section: вступunclassified

Improvement of merchandising assessment of fresh tomatoes and formation of the consumer properties of the products of their processing

Одарченко¹,

Сподар²,

Одарченко³

2015

TAPR

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“…Preparation of studied samples for the analysis is necessary for transforming all components of a sample in a form, necessary for conducting it. For this aim there are used all methods, applied in chemical analysis: comminution of solid specimens, dissolution, processing by different chemical reagents, heating [9].…”

Section: Introductionmentioning

confidence: 99%

Scientific Substantiation of the Methodology of Preparation of Quince Japanese for Analysis and Investigation of Consumer Properties of the Products of Its Recycling

Одарченко

Odarchenko

Lisnichenko

et al. 2019

EUREKA: Life Sciences

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The aim of the study is a scientific substantiation of the methodology of quince Japanese for analyzing and investigating consumer properties of its recycling products. The new way of sample preparation allows to reduce costs for estimation of the raw material quality. Obtained semi-products give a possibility to widen the assortment of frozen products, based on domestic raw materials. Fruits of quince Japanese, planted in the Poltava region, Ukraine, were chosen as a research object. For getting a representing sample, quince specimens were subjected to the offered sample preparation. It included inspection, processing and further cyclic freezing and centrifuging. As a result of the threefold cycle of freezing-centrifuging, solid and liquid phases were obtained. The obtained liquid part of quince Japanese is a homogenous liquid, without suspended particles, with a brightly expressed taste and smell, not stratified at storage. These changes are explained by redistribution of dry substances and moisture in studied samples. As a result of cyclic freezing-centrifuging of the research object, two new semi-products were obtained – solid and liquid phases. Within the scientific study there were determined organoleptic parameters of the obtained semi-products before freezing and after 270 days of low-temperature storage. The consistence, taste, smell and color of products are ones of their main consumption properties. According to the results of point estimation of organoleptic properties of the obtained semi-products, it has been established, that during 270 days of low-temperature storage these parameters didn’t change and stayed at the high level. The studies demonstrated freezing advantages in the aspect of reaching high organoleptic parameters of products after freezing and defrost that provides high-quality products in the process of low-temperature storage.

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The effect of the size of particles on optical and electrooptical properties of colloids

Cited by 12 publications

References 4 publications

Determination of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals using spectroscopic refractometry

Determination of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals using spectroscopic refractometry

Improvement of merchandising assessment of fresh tomatoes and formation of the consumer properties of the products of their processing

Scientific Substantiation of the Methodology of Preparation of Quince Japanese for Analysis and Investigation of Consumer Properties of the Products of Its Recycling

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