Preparation and Properties of Starch Phosphates Using Waxy, Common, and High-Amylose Corn Starches. II. Reactive Extrusion Method

Air filtration materials such as protective masks can protect humans from airborne pathogens; however, most of the existing protective filtration materials are aimed to intercept bacteria. Therefore, in this work, modified polypropylene- (PP-) based melt-blown nonwovens with antibacterial property were prepared for reducing the infection rate during the filtering process. Firstly, an N-halamine precursor, 2,4-diamino-6-diallylamino-1,3,5-triazine (NDAM) monomer, was grafted with PP polymers (PP-g-NDAM) by reactive extrusion method, and the grafting effect was confirmed by nitrogen analysis and FTIR spectra. Then, the obtained PP-g-NDAM was mixed with pristine PP resins in different ratios to prepare the filter materials by melt-blown technology. Finally, the new PP-g-NDAM melt-blown filter materials were finishing treated by the chlorination and electrostatic process, which showed a high filtration efficiency with low pressure drop and a potent antibacterial effect against Escherichia coli (E. coli). This work provides an innovative method for manufacturing antibacterial filtration nonwovens, which can improve the quality of conventional filtration products.

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Hydrolytic action of α-amylase on high-amylose starch of low molecular mass

Biotechnology and Applied Biochemistry ◽

10.1042/ba19990100 ◽

2000 ◽

Vol 31 (3) ◽

pp. 171 ◽

Cited By ~ 27

Author(s):

Jacob A. Rendleman, Jr.

Keyword(s):

Molecular Mass ◽

High Amylose

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UTILIZATION OF DNA MARKERS FOR EVALUATING AMYLOSE CONTENT OF GRAIN IN RICE

HUE UNIVERSITY JOURNAL OF SCIENCE AGRICULTURE AND RURAL DEVELOPMENT ◽

10.26459/jard.v83i5.3081 ◽

2013 ◽

Vol 83 (5) ◽

Author(s):

Dương Thanh Thủy ◽

Taiichiro Ookawa

Keyword(s):

Single Nucleotide Polymorphism ◽

Amylose Content ◽

Waxy Gene ◽

Nucleotide Polymorphism ◽

Single Nucleotide ◽

Branching Enzymes ◽

Wx Gene ◽

High Amylose ◽

Suitable Marker ◽

Granule Bound Starch Synthase

The sensory and functional properties of rice are predominantly associated with its amylose content. Granule-bound starch synthase (GBSS) encoded by the Waxy (Wx) gene determines the synthesis of amylose, while starch branching enzymes encoded by Sbe genes are involved in the formation of amylopectin. Some studies have demonstrated that Wx gene is the major controller of amylose content but there are one or more modifying genes affecting the amylose content. Three markers, microsatellite, Single – nucleotide – polymorphism (G/T SNP) in Wx gene and Single – nucleotide – polymorphism (T/C SNP) in Sbe1 gene, were tested for their association with amylose content using sixty-nine rice accessions from twenty countries. Of the three markers, two markers in Wx gene are significantly associated with amylose content. The combination of two markers in Wx gene (haplotypes) explained 83.8% of the variation in amylose content and discriminated the three market classes of glutinous, low, intermediate and high amylose content of rice from each other. And T/C SNP in Sbe1 locus was not a suitable marker for amylose content. Keywords: marker, amylose content, Waxy gene.

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