Thermogravimetric determination of starch content in starch–polyethylene blend films

1992 ◽  
Vol 45 (11) ◽  
pp. 1881-1887 ◽  
Author(s):  
S. Nakatsuka ◽  
A. L. Andrady
Keyword(s):  
Starch Content ◽  
Blend Films ◽  
Polyethylene Blend

Use of Near-Infrared Spectroscopy to Determine the Composition of High-Density/Low-Density Polyethylene Blend Films

1993 ◽  
Vol 47 (2) ◽  
pp. 222-228 ◽  
Author(s):  
Charles E. Miller
Keyword(s):  
Near Infrared ◽  
Principal Component Regression ◽  
Nir Spectroscopy ◽  
Principal Component ◽  
High Density ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Blend Films ◽  
Polyethylene Blend

The ability of near-infrared (NIR) spectroscopy, combined with principal component regression (PCR), to nondestructively determine the blend ratio of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) in extruded films is demonstrated. Results indicate that the NIR spectrum in the region 2100 to 2500 nm can be used to determine the HDPE mass percentage of 60–80- μm-thick film samples to within 2.5%, over a range of 0 to 100%. NIR spectral effects from scattering are important for the determination of the HDPE % for HDPE contents above 50%, and spectral effects from changes in the methyl group concentration and perhaps the PE crystallinity are important for the determination of the HDPE % for HDPE contents below 50%. In addition, a large variation between the spectra of replicate samples, probably caused by variations in the degree or direction of molecular orientation in the samples, was observed.

Determination of starch content in single kernel using near-infrared hyperspectral images from two sides of corn seeds

2020 ◽  
Vol 110 ◽  
pp. 103462
Author(s):  
Chen Liu ◽  
Wenqian Huang ◽  
Guiyan Yang ◽  
Qingyan Wang ◽  
Jiangbo Li ◽  
...  
Keyword(s):  
Near Infrared ◽  
Starch Content ◽  
Hyperspectral Images ◽  
Two Sides

Determination of starch content in adulterated fresh cheese using hyperspectral imaging

2018 ◽  
Vol 21 ◽  
pp. 14-19 ◽  
Author(s):  
Abel Barreto ◽  
J.P. Cruz-Tirado ◽  
Raúl Siche ◽  
Roberto Quevedo
Keyword(s):  
Hyperspectral Imaging ◽  
Starch Content ◽  
Fresh Cheese

scholarly journals Use of Sieving as a Valuable Technology to Produce Enriched Buckwheat Flours: A Preliminary Study

Antioxidants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 583 ◽  
Author(s):  
Beatriz Martín-García ◽  
Federica Pasini ◽  
Vito Verardo ◽  
Ana María Gómez-Caravaca ◽  
Emanuele Marconi ◽  
...  
Keyword(s):  
Particle Size ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Starch Content ◽  
Salt Content ◽  
Total Phenolic ◽  
Physical Separation ◽  
Preliminary Study ◽  
Total Starch

Fractionation processes based on physical separation are a good strategy to produce enriched cereal flours. Therefore, the aim of this work is to evaluate the suitability of sieving of buckwheat flours to produce protein and phenolic (especially rutin) enriched fractions. Because of that, dehulled whole buckwheat flour (GSTQ) was sieved obtaining fractions with a particle size of 215 µm, 160 µm, 85 µm, and 45 µm (GS215, GS160, GS85, and GS45). For that purpose, the determination of protein, ash, and total starch content and free and bound phenolic compounds was carried out. The highest content of total phenolic compounds was obtained in GS215 (3118.84 mg kg−1 d.w.), followed by GS160 (2499.11 mg kg−1 d.w.), GS85 (989.46 mg kg−1 d.w.), GSTQ (983.15 mg kg−1 d.w.), and GS45 (481.31 mg kg−1 d.w.). Therefore, the phenolic content decreased with the particle size decrease from 215 µm to 45 µm. Besides, there were no significant differences between the total phenolic content in GS85 and GSTQ. The fraction with 215 µm reported the highest protein and mineral salt content and presented rutin amounts four times higher than GSTQ.

scholarly journals Highly polarized luminescence from oriented conjugated polymer/polyethylene blend films

1997 ◽  
Vol 9 (13) ◽  
pp. 1035-1039 ◽  
Author(s):  
Christoph Weder ◽  
Christian Sarwa ◽  
Cees Bastiaansen ◽  
Paul Smith
Keyword(s):  
Conjugated Polymer ◽  
Blend Films ◽  
Polyethylene Blend ◽  
Polarized Luminescence
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