scholarly journals Particle Size Distribution and Physicochemical Properties of Pellets Made of Straw, Hay, and Their Blends

2018 ◽  
Vol 11 (1) ◽  
pp. 63-75 ◽  
Author(s):  
Aleksander Lisowski ◽  
Patryk Matkowski ◽  
Magdalena Dąbrowska ◽  
Michał Piątek ◽  
Adam Świętochowski ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution

scholarly journals Physicochemical Properties and Resistant Starch Content of Corn Tortilla Flours Refrigerated at Different Storage Times

Foods ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 469
Author(s):  
Isela Rojas-Molina ◽  
Monsserrat Mendoza-Avila ◽  
María de los Ángeles Cornejo-Villegas ◽  
Alicia Del Real-López ◽  
Eric Rivera-Muñoz ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Resistant Starch ◽  
Water Solubility ◽  
Corn Starch ◽  
Starch Content ◽  
Type I ◽  
Corn Tortilla

The tortilla is a foodstuff that has a short shelf-life, causing great losses to the industry. The objective of this work was to evaluate, for the first time, the physicochemical properties and resistant starch (RS) content of flours. These were obtained from nixtamalized corn tortillas made with traditional and industrial (commercial) methods, stored at 4 °C for 7, 15, and 30 days. The flours were characterized by measuring particle size distribution, color, water absorption index (WAI), water solubility index (WSI), viscosity, calcium, and RS content. Additionally, chemical proximate analysis, scanning electron microscopy (SEM), and thermal analysis were conducted. Storage at 4 °C increased the friability of tortillas and shifted the particle size distribution toward a greater content of coarse particles in corn tortilla flours. The commercial corn tortilla flours showed higher WAI and WSI values than the traditional corn tortilla flours. On the other hand, the traditional corn tortilla flours exhibited higher RS content values than commercial corn tortilla flours as well as peak viscosity. X-ray diffractograms revealed the presence of amylose-lipid complexes (RS5) in experimental samples. The thermograms evidenced three endotherms corresponding to corn starch gelatinization and melting of type I and type II amylose–lipid complexes.

scholarly journals Producing High-Dose Liqui-Tablet (Ketoprofen 100 mg) for Enhanced Drug Release Using Novel Liqui-Mass Technology

2021 ◽  
Author(s):  
Matthew Lam ◽  
Ali Nokhodchi
Keyword(s):  
Particle Size ◽  
Quality Control ◽  
Drug Release ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Dosage Form ◽  
High Dose ◽  
Solubility Test ◽  
Tablet Hardness

Abstract Purpose Liqui-Tablet is a dosage form derived from Liqui-Mass technology. It has proven to be a promising approach to improve drug dissolution rate of poorly water-soluble drugs. So far, Liqui-Tablet is feasible for low-dose drugs. In this study, an attempt was made to produce high-dose Liqui-Tablet, whilst maintaining ideal physicochemical properties for ease of manufacturing. Methods Liqui-Tablets containing 100 mg of ketoprofen were produced using various liquid vehicles including PEG 200, Span 80, Kolliphor EL, PG, and Tween 85. Investigations that were carried out included saturation solubility test, dissolution test, tomographic study, and typical quality control tests for assessing flowability, particle size distribution, friability, and tablet hardness. Results The weight of these Liqui-Tablets was acceptable for swallowing (483.8 mg), and the saturation solubility test showed PEG 200 to be the most suitable liquid vehicle (493 mg/mL). Tests investigating physicochemical properties such as flowability, particle size distribution, friability, and tablet hardness have shown no issue concerning quality control and manufacturability. The drug release test of the best formulation has shown extremely rapid drug release at pH 7.4 (100% after 5 min). At pH 1.2 the drug release was reasonable considering the formulation was yet to be optimized. Conclusion Despite the high amount of API and liquid vehicle, it is possible to produce a high-dose dosage form with acceptable size and weight for swallowing using the novel Liqui-Mass technology. This has the potential to diversify the technology by removing the restriction of high dose drug that has been seen in liquisolid technology.

Comparative Study of Physicochemical Properties of Dragon’s Blood Powders

2011 ◽  
Vol 311-313 ◽  
pp. 560-565 ◽  
Author(s):  
Guo Wei Zhao ◽  
Chun Liu Wang ◽  
Zheng Gen Liao ◽  
Xin Li Liang ◽  
Yun Chao Cao ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Moisture Absorption ◽  
Fine Powder ◽  
Ultrafine Powder ◽  
Ultrafine Powders ◽  
Dragon’S Blood ◽  
Significant Difference

Compare investigate physicochemical properties of fine powder and two ultrafine powders of Dragon’s Blood, and then to determinate particle size distribution for ultrafine powders of Dragon’s Blood. Specific surface area and porosity, surface morphology and moisture absorption of Dragon’s Blood powders were investigated. The content and the in vitro dissolution of dracorhodin in Dragon’s Blood powders were determined by HPLC. The results showed that the content of dracorhodin had no significant difference among three Dragon’s Blood powders. With the decreasing of particle size the degree of moisture decreased. The dissolution of dracorhodin in the order of: ultrafine powder I > ultrafine powder II > fine powder. An appropriate degree of superfine grinding can improve moisture absorption of Dragon’s Blood powders and dissolution of dracorhodin. Particle size distribution of Dragon’s Blood ultrafine powder should be controlled about 40 μm.

Study on Physicochemical Properties and Application Prospect of Several Typical Bentonite

2013 ◽  
Vol 333-335 ◽  
pp. 2015-2018
Author(s):  
Tian Li Xue ◽  
Shao Jian Ma ◽  
Lin Ling Jiang ◽  
Xu Yuan Zhang ◽  
Wei Mo
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Mineral Composition ◽  
Standard Methods ◽  
Application Field ◽  
Development And Utilization ◽  
Application Prospects ◽  
Better Than

Four kinds of bentonite samples were studied in this paper. Mainly discussing the particle size distribution, mineral composition and physicochemical properties of bentonite, the aim was to provide a useful reference for the efficient development and utilization of bentonite resources. The results indicated that NM-bent., HB-bent. and EZ-bent. were Ca (Mg)-bentonite while XZJ-bent. was Na-bentonite. The physicochemical properties of bentonite mainly depended on interlayer cations. Many properties indexes of Na-bentonite were better than that of Ca (Mg)-bentonite. Some properties indexes showed a poor reproducibility when tested by standard methods. The natural Na-bentonite has excellent properties and extensive application prospects while Ca (Mg)-bentonite needed for further processing to meet the demand of the application field.

The Physicochemical Properties and the Fate of Fly Ash along the Air Pollution Control Devices in Coal-Fired Power Plant

2014 ◽  
Vol 1078 ◽  
pp. 144-148 ◽  
Author(s):  
Yi Zhang ◽  
Li Li Fu ◽  
Quan Lu ◽  
Xin Cao ◽  
Jian Yi Lu
Keyword(s):  
Air Pollution ◽  
Particle Size ◽  
Fly Ash ◽  
Power Plant ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Pollution Control ◽  
Air Pollution Control ◽  
X Ray

The fly ash at the exit of inlet and outlet of No.2 ESP and outlet of No.2 FGD in San-he Power Plant were sampled. The microstructure, elemental composition, particle size distribution and other physicochemical properties of the collected ash samples were tested and analyzed by a scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Mastersizer2000 laser particle size analyzer. The results showed that, ESP outlet fly ash particle size distribution curve was significantly moved to the left, the proportion of the fine ash at the outlet was significantly increased compared with that of at the inlet, the morphology and composition of ash at the outlet of ESP, FGD was significantly changed compared to the ash at the inlet of ESP, indicating that air pollution control equipment (APCDs) have a great impact on physicochemical properties and the fate of fly ash.

scholarly journals The Relationship between the Physicochemical Properties and Permeability of the Fluvisols and Eutric Cambisols in the Zagreb Aquifer, Croatia

Geosciences ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 416
Author(s):  
Ružičić ◽  
Kovač ◽  
Perković ◽  
Bačani ◽  
Majhen
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physicochemical Properties ◽  
Size Distribution ◽  
Total Concentration ◽  
Chemical Properties ◽  
Carbonate Content ◽  
Soil Permeability ◽  
Soil Water Retention ◽  
The Relationship

The physicochemical properties of soil and the unsaturated zone can have a large influence on the infiltration of precipitation into an aquifer. Soil permeability presents soil property that can be very variable. The main objectives of this study were to estimate differences in soil permeability in two dominant types of soils—Fluvisols and Eutric Cambisols—in the area of the Zagreb aquifer and determine the relationship between the physicochemical properties and the permeability of the analyzed soils. For this purpose, the particle size distribution, soil water retention curves (SWRCs), hydraulic parameters, and chemical properties of soils (i.e., electrical conductivity (EC), pH, carbonate content, cation exchange capacity (CEC), and total concentration of zinc (Zn)) from six soil profiles were observed. In general, the results show that Fluvisols have a smaller amount of clay and a higher amount of sand. Furthermore, particle size distribution indicates that Eutric Cambisols have smaller permeability and a slightly higher capacity for retention. In Eutric Cambisols, the percentages of clay, silt, and sand generally do not change with depth. On average, Fluvisols and Eutric Cambisols become impermeable when they reach different values of water content and effective saturation. All results suggest that Fluvisols generally have to desaturate more than Eutric Cambisols to become impermeable. The proportions of sand and Ks increases through the depth of all analyzed soils, while CEC, EC, and Zn decrease. The total Zn generally decrease with depth, which can be attributed to the aerodeposition in the surface horizons of the analyzed soils and their higher availability for binding/sorption elements. Generally, it can be seen that most Zn concentrations increase until 80 cm in depth, after which they decrease. This result indicates that, in these specific locations, the groundwater body is not under the influence of a potentially toxic metal, in this case Zn. Statistical analysis shows a strong correlation between Zn concentrations and some soil properties, such as soil texture and CEC. This may point to the prevalence of Zn retention. Furthermore, statistical results show that silt has a higher influence on the permeability of Eutric Cambisols than Fluvisols.

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