Effect of electron beam irradiation on physicochemical properties of corn starch and improvement of enzymatic saccharification of corn starch at high concentration (45%)

Electron beam irradiation into type-Ib diamond is known as a good method for the creation of high concentration negatively-charged nitrogen-vacancy (NV−) centers by which highly sensitive quantum sensors can be fabricated. In order to understand the creation mechanism of NV− centers, we study the behavior of substitutional isolated nitrogen (P1 centers) and NV− centers in type-Ib diamond, with an initial P1 concentration of 40–80 ppm by electron beam irradiation up to 8.0 × 1018 electrons/cm2. P1 concentration and NV− concentration were measured using electron spin resonance and photoluminescence measurements. P1 center count decreases with increasing irradiation fluence up to 8.0 × 1018 electrons/cm2. The rate of decrease in P1 is slightly lower at irradiation fluence above 4.0 × 1018 electrons/cm2 especially for samples of low initial P1 concentration. Comparing concentration of P1 centers with that of NV− centers, it suggests that a part of P1 centers plays a role in the formation of other defects. The usefulness of electron beam irradiation to type-Ib diamonds was confirmed by the resultant conversion efficiency from P1 to NV− center around 12–19%.

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Study on enzymatic hydrolysis efficiency and physicochemical properties of cellulose and lignocellulose after pretreatment with electron beam irradiation

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2019.12.232 ◽

2020 ◽

Vol 145 ◽

pp. 733-739 ◽

Cited By ~ 5

Author(s):

Xionghui Fei ◽

Wenbao Jia ◽

Junqi Wang ◽

Ting Chen ◽

Yongsheng Ling

Keyword(s):

Electron Beam ◽

Enzymatic Hydrolysis ◽

Physicochemical Properties ◽

Electron Beam Irradiation ◽

Beam Irradiation

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Effects of gamma ray and electron beam irradiation on the mechanical, thermal, structural and physicochemical properties of poly (ether-block-amide) thermoplastic elastomers

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2012.09.011 ◽

2013 ◽

Vol 17 ◽

pp. 252-268 ◽

Cited By ~ 26

Author(s):

Kieran A. Murray ◽

James E. Kennedy ◽

Brian McEvoy ◽

Olivier Vrain ◽

Damien Ryan ◽

...

Keyword(s):

Electron Beam ◽

Physicochemical Properties ◽

Electron Beam Irradiation ◽

Gamma Ray ◽

Thermoplastic Elastomers ◽

Beam Irradiation

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Effect of moisture on technological properties of corn starch modified by the electron beam irradiation

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v3i3.514 ◽

2020 ◽

Vol 3 (3) ◽

Author(s):

Nguyen Dang My Duyen ◽

Pham Ngoc Viet

Keyword(s):

Electron Beam ◽

Moisture Content ◽

Electron Beam Irradiation ◽

Corn Starch ◽

Free Acid ◽

Technological Properties ◽

Beam Irradiation ◽

Gel Structure ◽

Beam Radiation ◽

Starch Gel

Electron beam irradiation is one of the most effective starch modification methods. Moisture is one of the factors that is affected by the irradiation via the free radical formation. The effect of the moisture content on the technological properties of irradiated starch samples was studied. The moisture content of corn starch samples in this study was adjusted at 9.08, 12.96, 15.06, 20.39 and 29.09% (w w). Corn starch samples were irradiated at 5 kGy. Color, free acid, solubility, swelling, transparency, syneresis and starch gel structure were studied to elucidate the effect of the moisture on technological properties of corn starch treated by electron beam. The results showed that electron beam radiation caused starch samples at different moisture to break into small molecules due to the separation of the glycosidie bonds. Thus, free acid, swelling, solubility of irradiated starch samples were higher than those of natural starch samples and were increased with low moisture content. The results also indicated that electron beam treatment increased the syneresis of irradiated starch samples. The texture profile analysis (TPA) of starch gel structure showed that textural properties such as hardness, elasticity and chewiness of irradiated starch samples were higher than those of natural starch samples.

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