Changes in particle size, structure, and physicochemical properties of potato starch after jet‐milling treatments

AbstractTo investigate the factors affecting the wettability of copper mine blasting dust, the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust (HLBD) and hydrophobic blasting dust (HBBD) using water flotation method. The physicochemical properties of HLBD and HBBD were measured and compared with each other. The properties included particle size distributions (PSDs), micromorphologies, pore structures, mineral components and surface organic carbon functional groups. The results show that particle size and pore structure of the blasting dust are the main factors affecting its wettability. Specifically, particle size of HBBD is smaller than that of HLBD, and their respiratory dust (less than 10 µm) accounts for 61.74 vol% and 53.00 vol%, respectively. The pore structure of HBBD is more developed, and the total pore volume of HBBD is 1.66 times larger than that of HLBD. The identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction (XRD); however, the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD, this may be the reason for the poor wettability of HBBD. This study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

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RG- І pectin affects the physicochemical properties and digestibility of potato starch

Food Hydrocolloids ◽

10.1016/j.foodhyd.2021.106687 ◽

2021 ◽

Vol 117 ◽

pp. 106687

Author(s):

Xiuxiu Yin ◽

Yuxue Zheng ◽

Xiangli Kong ◽

Shuyun Cao ◽

Shiguo Chen ◽

...

Keyword(s):

Physicochemical Properties ◽

Potato Starch

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Particle Size, Structure and Powdering Process of Calcium Carbonate Nanoparticles Filled Powdered Styrene-Butadiene Rubber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.237 ◽

2011 ◽

Vol 415-417 ◽

pp. 237-242

Author(s):

Zhou Da Zhang ◽

Xue Mei Chen ◽

Guo Liang Qu

Keyword(s):

Particle Size ◽

Calcium Carbonate ◽

Size Structure ◽

Average Diameter ◽

Rubber Matrix ◽

Styrene Butadiene Rubber ◽

Butadiene Rubber ◽

Particle Structure ◽

Styrene Butadiene ◽

New Particles

Calcium carbonate nanoparticles (nano-CaCO3) filled powdered styrene-butadiene rubber (P(SBR/CaCO3) was prepared by adding nano-CaCO3 particles, encapsulant and coagulant to styrene-butadiene rubber (SBR) latex by coacervation, and the particle size distribution, structure were studied. Scanning electron microscopy (SEM) was used to investigate the (P(SBR/CaCO3) particle structure, and a powdering model was proposed to describe the powdering process. The process includes: (i) the latex particles associated with the dispersed nano-CaCO3 particles (adsorption process) to form “new particles” and (ii) the formation of P(SBR/CaCO3) by coagulating “new particles”. The SEM results also shown that the nano-CaCO3 and rubber matrix have formed a macroscopic homogenization in the (P(SBR/CaCO3) particles and nano-CaCO3 dispersed uniformly in the rubber matrix with an average diameter of approximately 50 nm.

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CHEMICAL INVESTIGATIONS ON THE ACTIVE PRINCIPLES OF THE PHENOMENON OF LOCAL SKIN REACTIVITY TO BACTERIAL FILTRATES

Journal of Experimental Medicine ◽

10.1084/jem.67.1.1 ◽

1938 ◽

Vol 67 (1) ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Gregory Shwartzman ◽

S. A. Morell

Keyword(s):

Particle Size ◽

Physicochemical Properties ◽

Ammonium Sulfate ◽

Culture Filtrate ◽

Active Materials ◽

Local Skin ◽

Skin Reactivity ◽

Average Porosity ◽

Active Substances ◽

Capillary Analysis

Several physicochemical properties of the active principles of the phenomenon of local skin reactivity to bacterial filtrates have been investigated. Ultrafiltration through Zsigmondy filters of graded porosities has shown that the active substances are retained by membranes finer than 100 to 120 seconds, whereas coarser ones readily permit their passage. The average porosity of this filtration end-point represents a particle size of about 50 to 100 mµ. When fractionally precipitated with ammonium sulfate, most of the activity of a culture filtrate was concentrated in the two-thirds saturated portion. Isoelectric properties were studied by means of capillary analysis and cataphoresis. At pH 3.0 and below, the substances suspended in the culture filtrates migrated to the cathode; activity in this chamber, however, could not be demonstrated. At pH 4.0 and above, reversal to the anode occurred, as the active materials became negatively charged and readily migrated to this chamber. The isoelectric point, therefore, was considered to be between pH 3.0 and 4.0. Preliminary experiments on adsorption, extraction, and pH stability have been described.

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Dehumidified Air-Assisted Spray-Drying of Cloudy Beetroot Juice at Low Temperature

Applied Sciences ◽

10.3390/app11146578 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6578

Author(s):

Aleksandra Jedlińska ◽

Alicja Barańska ◽

Dorota Witrowa-Rajchert ◽

Ewa Ostrowska-Ligęza ◽

Katarzyna Samborska

Keyword(s):

Particle Size ◽

Physicochemical Properties ◽

Spray Drying ◽

Low Temperatures ◽

Beetroot Juice ◽

Particle Size And Morphology ◽

Size And Morphology ◽

Tapped Density ◽

Lower Loss ◽

Better Than

This paper discusses the physicochemical properties of powders obtained by spray drying of cloudy beetroot juice, using dehumidified air in variants with or without carriers. The inlet air temperature was 130 °C or 90 °C, and the addition of the carriers was at a ratio of juice to carrier solids of 3:2. In the obtained powders, the following physicochemical properties were determined: water content and water activity, apparent density, loose and tapped density, porosity, flowability, particle size and morphology, and the content and retention of betalains. It was possible to dry cloudy beetroot juice without the use of carriers at low temperatures (90 or 130 °C). The 100% beetroot powders were characterized by satisfactory physicochemical properties, often better than those with carriers (including lower hygroscopicity and higher color saturation and yield). A lower loss of betalains was found for the powders with the addition of carriers. The best process yields were obtained for the powder without carriers at 130 °C and 90 °C.

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