Effect of atmospheric pressure plasma jet on the structure and physicochemical properties of wheat starch

The effect of atmospheric pressure plasma jet (APPJ) with different discharge power (0, 400, 600, and 800 W) on the structure and physicochemical properties of wheat starch were evaluated in this study. After APPJ treatments, significant declines in peak viscosity, breakdown viscosity, and final viscosity of wheat starch pasting parameters were observed with increase of plasma treatment power. Being treated with discharge power of 800 W, the PV and BD value of wheat starch paste significantly dropped to 2,578 and 331 cP, respectively. Apparently, APPJ could raise the solubility of wheat starch, while reduce the swelling capacity, and also lower the G′ and G″ value of wheat starch gel. Roughness and apparent scratch was observed on the surface of the treated wheat starch granules. Although APPJ treatment did not alter wheat starch’s crystallization type, it abated the relative crystallinity. APPJ treatment might be useful in producing modified wheat starch with lower viscosity and higher solubility.

1 Introduction

Wheat starch is the main component of wheat (Triticuma estivum L.), and accounts for 65–75% of wheat grains (based on the dry weight) (1). Wheat starch can be used in all kinds of foods such as steamed bread, deep-fried dough sticks, pasta, noodles, bread, cakes, etc., and has higher commercial value (2). Although natural wheat starch has the advantages of rich source and low cost, its application in food industry is limited because of its low water solubility, prone to aging and retrogradation (3). To overcome the upper disadvantages, the chemical, physical, and enzymatic methods are usually employed to modify starch (4–8). In recent years, the non-thermal physical modification methods for starch has been received much attention for environmental protection, higher efficiency, and easy operation (9).

Cold plasma is partially or completely ionized gas, which could be produced by using dielectric barrier discharge (DBD), glow discharge, radio frequency discharge, resistive barrier discharge, microwave discharges, corona discharge, and atmospheric pressure plasma jet (APPJ) to neutral gas with atmospheric or low pressure (10). Cold plasma contains several reactive substances, including singlet oxygen, ozone, hydroxyl radical, nitric oxide, hydrogen peroxide, superoxide anion, nitrite, etc. (11). As an emerging green physical modification method, cold plasma has shown great application in starch modification due to its advantages such as low energy consumption, higher efficiency, and fewer by-products (12). Ranjitha et al. (13) reported that, being treated by pin to plate cold plasma under the ordinary pressure, the surface of mango kernel starch granules was etched, its starch chain was depolymerized. Modified by radio frequency air plasma, the surface of cassava starch granules was also etched, resulting in the increased hydrophilicity (14). The viscosity of corn starch increased after being modified by DBD at 50 V for 5 min (15). In another study, glow-plasma (the discharge gas was nitrogen and helium) caused the viscosity parameters of potato starch paste decline (16). Additionally, ethylene glow discharge plasma could significantly reduce the decomposition temperature of starch (17). It could be observed that cold plasma could obviously affect not only the structure feature but also the functional properties of starch.

Many scholars have carried out systematic research on starch modification by DBD discharge, but few have reported on the effect of APPJ discharge on starch modification, especially on the structure and physicochemical properties of wheat starch. In this study, wheat starch was treated by APPJ with different discharge power, the changes of physicochemical properties such as solubility, swelling capacity, rheological, and pasting parameters were investigated. The effect of APPJ treatment on structural features (amylose content, crystal structure, and morphology of starch) was also analyzed.

2 Materials and methods

2.1 Materials and chemicals

Wheat flour (it is prepared with wheat of Bainong 4199 variety, which is widely cultivated in Henan Province, China) was purchased from Jiyuan Xuemiao Wheat Deep Processing Technology Company, Jiyuan, China. Wheat starch was prepared from wheat flour according to the method in the literature reported by Punia et al. (18). All the other chemical reagents (such as potassium iodide, ethanol, potassium bromate, sodium hydroxide, hydrochloric acid, etc.) utilized in this paper were of analytical grade.

2.2 Atmospheric pressure plasma jet modification of wheat starch

The schematic diagram of APPJ employed in present research was shown in Figure 1. 90 mL of wheat starch suspension (30%, m/v) was modified by APPJ apparatus (Henan Xiantu Zhineng Co., Ltd., Zhengzhou, China). Compressed air under pressure of 0.2 MPa was used as the working gas, and the velocity of flow was set at 50 L/min. The distance from the surface of wheat starch slurry to the plasma jet nozzle was 32 mm. The starch samples were treated by APPJ at three different input discharge powers (0, 400, 600, and 800 W) for 3 min. After being washed with double distilled water, the APPJ treated wheat starch samples were dried for 60 h at 40°C.

Figure 1

Figure 1. The schematic diagram of APPJ device.

2.3 Solubility and swelling power measurement

The solubility and swelling capacity of all wheat starch samples were examined following the method described by Liu and Shen (19) with slight modification. Suspension of wheat starch (1%, w/v) was kept at 55–85°C for 0.5 h with intermittent stirring. After being cooled down to ambient temperature (25°C), the mixture was centrifuged for 25 min at 7,000 × g. The supernatant was collected, and then dried for 4 h at 110°C. The weight of starch sample (m), the dissolved solids in the supernatant (m₁), and the dissolved solids in sediment (m₂) was obtained. The swelling power and solubility was calculated as follows:

$\begin{array}{c}\mathrm{Solubility}\left(\%\right)=\left[{\mathrm{m}}_1/\mathrm{m}\right]\times 100;\mathrm{Swelling\; power}\\ =\left[{\mathrm{m}}_2/\left(\mathrm{m}\left(1-\mathrm{Solubility}\right)\right)\right]\times 100\end{array}$

2.4 Pasting property

The RVA-4500 visco analyzer (Hagersten, Sweden) was utilized to examine the pasting parameters of native-WS and APPJ treated wheat starch. The measurement conditions were set up according to the published method (20). 2.5 g of wheat starch samples was mixed with 25 mL of distilled water. The test conditions were set as follows: samples were equilibrated at 50°C for 1 min, heated to 95°C at the rate of 12°C/min, kept at 95°C for 2.5 min, then cooled to 50°C at 12°C/min, and held for 2 min. The parameters of starch pasting were determined.

2.5 Rheological properties

The Haake Mars 60 rheometer was employed to measure the dynamic rheological parameters of wheat starch samples. Frequency sweep test parameters were set according to the method described by Ji et al. (21). The values of G″, G′, and tan δ (G″/G′) were obtained.

2.6 Amylose content examination

The amylose amount of native-WS and APPJ treated wheat starch was examined according to the reported method of Guo et al. (22). 10 mg of wheat starch samples was dispersed in 8 mL 90% dimethyl sulfoxide and stirred constantly in a boiling water bath for 20 min. After being cooled to room temperature, 5 mL of iodine solution (2.5 mM I₂/6.5 mM KI) was added and mixed completely. Subsequently, the mixture was diluted to 50 mL with distilled water and mixed vigorously. The absorbance was detected at 600 nm and amylose content was calculated.

2.7 X-ray diffraction

The XRD patterns of wheat starch were obtained by D8 Advance Bruker XRD (Germany), measured as described by Sun et al. (20). The test conditions were as follows: radiation source was Cu-Kα at a voltage of 40 kV and a current of 100 mA, the 2θ angle was set in the range from 4 to 40°, and the scanning speed was with 2°/min. And then the degree of relative crystallinity was calculated.

2.8 FT-IR spectroscopy

According to the published method (23), a Tensor 27 FT-IR spectroscopy (Billerica) was used to analyze wheat starch samples. Wheat samples were mixed with KBr (the ratio of sample to KBr was 1:100, w/w). And then, the mixture was pressed into filmy pellet. The scanning wavelength range was set from 4,000 to 500 cm⁻¹, and the times of average scan time were 16. The scanning was carried out with the speed of 4 cm⁻¹.

2.9 Morphological characterization observation

The morphological characteristics of wheat starch samples were observed using a FEI Quanta 200 SEM (United States). After being gold-plate, the native-WS and APPJ treated wheat starch was observed at voltage of 15 kV, and the representative images were recorded at the magnification of 2,000×.

2.10 Statistical analysis

Results were displayed as the mean ± standard deviation (SD). Origin 2016 was used to draw the graphs. The statistical comparison was based on LSD test by using SPSS26.0, and the significance was set at p < 0.05. All experiments were carried out in triplicates.

3 Results and discussion

3.1 Solubility and swelling power

The solubility of APPJ treated wheat starch was much higher than that of native-WS, and with the increase of APPJ discharge power, the solubility of modified wheat starch noticeably increased (Table 1). Similar results had been previously observed (24, 25). The reason for the increase of starch solubility was that active species in plasma could partially decompose or depolymerize starch granules into smaller starch fragments, which increased the solubility (26, 27). At 55°C, the solubility of wheat starch increased from 3.97% (native-WS) to 5.62% (APPJ-P800 sample), which showed that cold plasma raised the solubility of wheat starch in non-pasting state (25). This also indicated that APPJ treatment could lose the surface structure of starch granule. At 85°C, the solubility of wheat starch significantly rose from 8.90% (native-WS) to 10.72% (APPJ-P800 sample), which indicated that APPJ treatment could improve the solubility of wheat starch in the pasting period.

Table 1

Table 1. Solubility of native-WS and APPJ treated wheat starch samples.

Swelling power of APPJ treated wheat starch was significantly lower than that of native starch (p < 0.05), and decreased with the increase of APPJ discharge power (Table 2). At 85°C, the swelling degree of wheat starch notably decreased from 15.52% (native-WS) to 10.61% (APPJ-P800 sample). This might be due to the starch chains’ destruction caused by APPJ, which led to the decline in the holding water ability of the swollen starch granules (28). Some studies had reported similar trends of decrease in swelling power such as in banana starch (25), and in maize starch (29). While, Wu et al. (24) reported that no apparent changes had been found between corn starch without modification and the samples treated with APPJ. On the contrary, the report had described that pin-to-plate cold plasma with the input voltage changing from 190 to 230 V could enhance the swelling volume of arrowroot starch (30).

Table 2

Table 2. Swelling power of native-WS and APPJ treated wheat starch samples.

3.2 Pasting properties

Pasting parameters of the native-WS and APPJ treated wheat starch were shown in Table 3. The peak viscosity (PV), final viscosity (FV), setback viscosity (SB), and breakdown viscosity (BD) of wheat starch decreased after APPJ treatment by comparison with those of native-WS (Table 3). With the increase of plasma power, all viscosity parameters of APPJ treated wheat starch decreased. When the treatment power was 400 W, the PV, TV, BD, and FV of wheat starch was 3,458, 2,990, 469, and 4,220 cP, respectively, which was notably lower than those in native-WS. Gao et al. (28) had investigated the influence of DBD on starch’ digestion and physicochemical properties, and reported the similar results. Additionally, similar results were also found in the previous reports (16, 27). The viscosity parameters reduced when potato starch and red adzuki bean starch was modified by glow-plasma and DBD plasma, respectively (16, 27).

Table 3

Table 3. Pasting properties of native-WS and APPJ treated wheat starch samples.

The PV represented the starch granule swelling extent during its pasting period (31). The PV value of APPJ-P800 sample plunged to 2,578 cP, reduced by 29.70% compared with that of native-WS (the value was 3,667 cP), which might be accounted for the depolymerization of starch chains caused by APPJ treatment. With APPJ discharge power at 800 W, the BD value notably decreased by −43.32%, dropping from 584 cP (native-WS) to 331 cP (APPJ-P800), suggesting cold plasma could enhance the thermal and shear stability of starch samples. The SB value reflected aging property of starch after being gelatinized and cooled. The SB of APPJ treated wheat starch declined along with increase of APPJ discharge power. Remarkable decline in SB value from 1,267 cP (native-WS) to 1,033 cP (−18.47% for APPJ-P800 sample) was noted. These indicated that APPJ could enhance the stability of cooled paste of starch. Additionally, the gelatinization temperature (GT) of APPJ modified wheat starch was less than that of native-WS (the value was 87.40°C), and reached to the minimum of 84.58°C (APPJ-P600 sample), which suggested that the APPJ treatment promoted starch granules to absorb water to swell and to crack during gelatinization period.

3.3 Rheological properties

The rheological properties of native-WS and APPJ treated wheat starches were presented in Figures 2, 3. Figure 2 displayed that both G′ and G″ of native-WS and APPJ treated wheat starch increased with increasing frequency, which indicated that the modulus of wheat starch gel was frequency dependent. Additionally, in course of frequency variation, the G′ value of all starch samples gel was always larger than G″ value (Figure 2), and its tan δ was always less than 1 (Figure 3), which indicated that all the gels of native-WS and APPJ treated wheat starch were typical weak gel systems.

Figure 2

Figure 2. Modules of G′ and G″ for Native-WS and APPJ treated wheat starch samples with frequency.

Figure 3

Figure 3. Rheological parameter of tan δ for Native-WS and APPJ treated wheat starch samples with frequency.

G′ of APPJ treated wheat starch gel was lower than those of the native in the measured frequency range, and had been declining with the increase of APPJ discharge power (Figure 2). These indicated that the starch gel became weaker, and was prone to be out of shape (32). It might be attributed to the molecular depolymerization of starch treated with APPJ. Additionally, APPJ treatment could also make G″ of wheat starch gel fall (Figure 2). Similar result was found by Yan et al. (25), who reported APPJ treatment lowered the G′ and G″ of corn starch gel.

The tan δ values of wheat starch gels treated with APPJ were obviously lower than those of native-WS samples (Figure 3), which revealed that the viscosity of the APPJ treated starch gel reduced quickly than elasticity, resulting in the starch gel with stronger solid-like behavior. Similar result was described in a previous study (25).

3.4 Amylose content

The content of amylose in native-WS and APPJ treated wheat starch was illustrated in Figure 4. The amylose content of wheat starch is usually in range of 20–30/100 g (33). The amylose content of native-WS was 24.44/100 g, which was close to the data reported by Liu et al. (33), but lower than that found with Shen et al. (31). This difference might be due to wheat varieties, wheat planting environment, and wheat starch preparation methods.

Figure 4

Figure 4. The content of amylose in native-WS and APPJ treated wheat starch samples. Different letters above the bar indicate the significant difference (p < 0.05).

Atmospheric pressure plasma jet treatments increased the amylose content of wheat starch (Figure 4). Treated with the higher discharge power of 800 W, the amylose content of wheat starch reached 31.23%, which increased by 27.78% than that of native-WS. Similar results were reported by Yan et al. (25). However, when corn starches were modified by cold plasma, its amylose content declined, which was observed by Banura et al. (14). These results indicated that cold plasma modification had different influence on the content of amylose in starch, which was due to starch from various sources and plasma produced by different gas component. The depolymerization of amylose chains caused by reactive species in cold plasma could be accounted for the reduce of amylose content (31). While, the higher amylose content of starch was attributed to the cleavage of α-1,6-glycosidic bonds induced by cold plasma (34, 35).

3.5 FT-IR analysis

The FT-IR spectra curve of native-WS and APPJ treated wheat starch were presented in Figure 5. Native wheat starch was observed with remarkable energy bands at the fingerprint region. No new absorption peaks could be seen in FT-IR spectra (in the range from 4,000 to 500 cm⁻¹) of all APPJ treated wheat starch samples (Figure 5), which displayed that APPJ could not change the chemical group of wheat starch.

Figure 5

Figure 5. Fourier infrared spectrum of native-WS and APPJ treated wheat starch samples.

As shown in Figure 6, the absorbance intensity ratio (R) of 1047/1022 value of wheat starch samples showed a rising trend along with the enhancement of APPJ discharge power. At lower discharge power (400 and 600 W), a slightly increase (p > 0.05) of R_1047/1022 up to 1.12 and 1.14, respectively, were observed. At higher discharge power (800 W), R_1047/1022 reached to highest with the value of 1.27, which was 1.1-fold higher (p < 0.05) than that of native-WS (the value was 1.11). These results indicated that cold plasma treatment facilitated the formation of the ordered short-range double helices at the starch granule surface layers. Similar results had been demonstrated in the previous reports of Sun et al. (20), and Yan et al. (25), in which both banana and rice starch treated with DBD plasma significantly increased the value R_1047/1022 in starch granule. As could be seen in Figure 6, the change tendency in R_1047/1022 of APPJ treated wheat starch was inconsistent with the variation of relative crystallinity analyzed by XRD. The reason for the above results might be that FT-IR could only penetrate the starch granule surface. While, the X-ray could penetrate the whole starch granules (3).

Figure 6

Figure 6. The relative crystallinity and R_1047/1022 of native-WS and APPJ treated wheat starch. Different letters above the bar indicate the significant difference (p < 0.05).

3.6 Crystallization characteristics

Starch granule is a typical semi-crystalline crystal composed of crystalline region and amorphous zone. The XRD patterns of native-WS and APPJ treated wheat starch samples were illustrated in Figure 7. The native-WS and all APPJ treated wheat starch samples showed A-type crystalline structure, and the diffraction angles with definite sharp peaks were observed at 15, 17, 18, 20, and 23^o (Figure 7). This indicated that APPJ treatment did not change the crystalline polymorph of wheat starch. These results were consistent with the previous studies (36).

Figure 7

Figure 7. XRD spectra of native-WS and APPJ treated wheat starch.

Being compared with the relative crystallinity of native-WS, the value of wheat starch modified by APPJ with different discharge power obviously declined (Figure 6). The relative crystallinity became lower with the increase of APPJ treatment power, and decreased from 33.68% (the native-WS) to 30.20% (800 W APPJ treated wheat starch). After being modified by glow discharge plasma for 10 min at 40 W, the relative crystallinity of rice starch reduced to the value of 37.47%, notably lower than that of the native starch sample (43.06%), which was found by Thirumdas et al. (37). The decrease of relative crystallinity could be accounted for the starch molecules depolymerization bombarded by reactive species in plasma (32). Additionally, the interaction between reactive species in plasma and chains of starch molecules might induce the molecular scission and granular corrosion of starch, which resulted in the decrease in crystallinity (38). The stronger the cold plasma discharge power or the longer the cold plasma action time, the higher depolymerization rate of starch, which resulted in the lower relative crystallinity of starch (25, 31).

3.7 Morphology of granules

The SEM microstructure images of native-WS and APPJ treated wheat starch were illustrated in Figure 8. The surface of native wheat starch granules was smooth, almost without fissures or scratches. After APPJ treatments, no significant changes in the overall morphology of all starch samples were observed. While, surface roughness, dents, and apparent scratch was observed on the surface of wheat starch granules modified by APPJ with different discharge power. Previous works had also demonstrated the similar results (27, 39, 40). Fissures or cavities were found on the surface of starch granules, which was observed by Sudheesh et al. (39). Additionally, the higher the cold plasma treatment power, the more obvious the surface etching, similar result was described by Thirumdas et al. (41). In another study, it was interesting that nitrogen plasma had no effect on starch granules while helium plasma caused surface corrosion of starch (16). These differences might be attributed to the variance of plasma active components produced by various gas.

Figure 8

Figure 8. Scanning electron microscopy of native-WS and APPJ treated wheat starch samples (2,000×).

3.8 The potential mechanism of the effect of APPJ on wheat starch

Figure 9 showed schematic diagram of the proposed mechanism of the effect of APPJ on wheat starch. The interaction between APPJ and wheat starch-water suspension could produce reactive oxygen and nitrogen species, such as atomic oxygen, ozone, hydroxyl radicals, hydrogen peroxide, nitrates, nitric oxide, nitrites, and peroxynitrites (42). These active species could etch the surface of wheat starch granules, causing different degrees of fissures, cavities, and fragmentation on the surface of the starch granules (Figures 8, 9). During APPJ treatment, starch chain was decomposed or depolymerized (Figure 9), resulting in the increase of amylose content (Figure 4), the decline of the relative crystallinity (Figure 6), and the dropping of the swelling ability of wheat starch granules (Table 2). The larger the APPJ discharge power, the stronger etching intensity of starch granule and the higher depolymerization rate of starch molecules (Figure 9).

Figure 9

Figure 9. Schematic diagram of the proposed mechanism of the effect of APPJ on wheat starch.

4 Conclusion

Wheat starch was subjected to APPJ at different intensities (0, 400, 600, and 800 W, respectively). APPJ obviously changed the surface morphology of wheat starch granules. APPJ treated wheat starch had smaller viscosity such as PV, FV, and BD, and the G′ and G″ of gel was lower than those of the native wheat, too. Notably, APPJ led to a reduction of swelling power and an increase in solubility of starch. However, no significant changes were found in wheat starch’s crystalline structure and FT-IR spectra pattern after APPJ treatments. Therefore, APPJ had the potential to regulate the starch structure and functional properties, especially to enhance the solubility and decrease the viscosity of wheat starch. Future studies should be carried out to explore the effect of APPJ on fine structural parameters and digestive properties of wheat starch under different discharge power and constant effective time.

Data availability statement

The original contributions presented in the study are included in the article/supplementary material, further inquiries can be directed to the corresponding author.

Author contributions

HJ: Conceptualization, Data curation, Formal Analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing. DL: Validation, Visualization, Writing – original draft, Writing – review & editing. LZ: Formal Analysis, Methodology, Software, Supervision, Writing – original draft, Writing – review & editing. ML: Data curation, Writing – original draft, Writing – review & editing. HM: Formal Analysis, Funding acquisition, Resources, Writing – original draft, Writing – review & editing.

Funding

The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This research was supported by the Scientific and Technological Projects of Henan Province (No. 222102110085 and 212102110084) and the Major Science and Technology Project of Henan Province (No. 221100110500).

Acknowledgments

We thank the participants and professionals involved in this study.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

References

1. Wang, Z, Ma, S, Sun, B, Wang, F, Huang, J, Wang, X, et al. Effects of thermal properties and behavior of wheat starch and gluten on their interaction: a review. Int J Biol Macromol. (2021) 177:474–84. doi: 10.1016/j.ijbiomac.2021.02.175

PubMed Abstract | Crossref Full Text | Google Scholar

2. Hewry, PE, Hawkesford, MJ, Piironen, V, Lampi, AM, Gebruers, K, Boros, D, et al. Natural variation in grain composition of wheat and related cereals. J Agric Food Chem. (2013) 61:8295–303. doi: 10.1021/jf3054092

PubMed Abstract | Crossref Full Text | Google Scholar

3. Liu, G, Gu, Z, Hong, Y, Wei, H, Zhang, C, Huang, S, et al. Effects of molecular interactions in debranched high amylose starch on digestibility and hydrogel properties. Food Hydrocoll. (2020) 101:105498. doi: 10.1016/j.foodhyd.2019.105498

Crossref Full Text | Google Scholar

4. Guo, L, Yuan, Y, Li, J, Tan, C, Janaswamy, S, Lu, L, et al. Comparison of functional properties of porous starches produced with different enzyme combinations. Int J Biol Macromol. (2021) 174:110–9. doi: 10.1016/j.ijbiomac.2021.01.165

Crossref Full Text | Google Scholar

5. Mansur, AR, Jeong, GA, and Lee, CJ. Preparation, physicochemical properties, and in vivo digestibility of thermostable resistant starch from malic acid-treated wheat starch. Food Res Int. (2022) 162:112159. doi: 10.1016/j.foodres.2022.112159

PubMed Abstract | Crossref Full Text | Google Scholar

6. Shen, H, Yu, J, Bai, J, Liu, Y, Ge, X, Li, W, et al. A new pre-gelatinized starch preparing by spray drying and electron beam irradiation of oat starch. Food Chem. (2023) 398:133938. doi: 10.1016/j.foodchem.2022.133938

PubMed Abstract | Crossref Full Text | Google Scholar

7. Wang, N, Li, C, Miao, D, Hou, H, Dai, Y, Zhang, Y, et al. The effect of non-thermal physical modification on the structure, properties, and chemical activity of starch: a review. Int J Biol Macromol. (2023) 251:126200. doi: 10.1016/j.ijbiomac.2023.126200

PubMed Abstract | Crossref Full Text | Google Scholar

8. Zhong, Y, Xu, J, Liu, X, Ding, L, Svensson, B, Herburger, K, et al. Recent advances in enzyme biotechnology on modifying gelatinized and granular starch. Trends Food Sci Technol. (2022) 123:343–54. doi: 10.1016/j.tifs.2022.03.019

Crossref Full Text | Google Scholar

9. Chen, LL, Song, JQ, and Li, W. Research progress on the effect of non-thermal processing technology on the structural properties of starch. Food Sci. (2023) 44:380–93. doi: 10.7506/spkx1002-6630-20220407-079

Crossref Full Text | Google Scholar

10. Misra, NN, and Jo, C. Applications of cold plasma technology for microbiological safety in meat industry. Trends Food Sci Technol. (2017) 64:74–86. doi: 10.1016/j.tifs.2017.04.005

Crossref Full Text | Google Scholar

11. Xiang, Q, Liu, X, Li, J, Ding, T, Zhang, H, Zhang, X, et al. Influences of cold atmospheric plasma on microbial safety, physicochemical and sensorial qualities of meat products. J Food Sci Technol. (2018) 55:846–57. doi: 10.1007/s13197-017-3020-y

Crossref Full Text | Google Scholar

12. Maniglia, BC, Castan, HAN, Rojas, ML, and Augusto, PED. Emerging technologies to enhance starch performance. Curr Opin Food Sci. (2021) 37:26–36. doi: 10.1016/j.cofs.2020.09.003

Crossref Full Text | Google Scholar

13. Kalaivendan, RGT, Mishra, A, Eazhumalai, G, and Annapure, US. Effect of atmospheric pressure non-thermal pin to plate plasma on the functional, rheological, thermal, and morphological properties of mango seed kernel starch. Int J Biol Macromol. (2021) 196:63–71. doi: 10.1016/j.ijbiomac.2021.12.013

PubMed Abstract | Crossref Full Text | Google Scholar

14. Banura, S, Thirumdas, R, Kaur, A, Deshmukh, RR, and Annapure, US. Modification of starch using low pressure radio frequency air plasma. LWT Food Sci Technol. (2018) 89:719–24. doi: 10.1016/j.lwt.2017.11.056

Crossref Full Text | Google Scholar

15. Taslikh, M, Abbasi, H, Mortazavian, AM, Ghasemi, JB, Naeimabadi, A, and Nayebzadeh, K. Effect of cold plasma treatment, cross-linking, and dual modification on corn starch. Starch Stärke. (2022) 74:2200008. doi: 10.1002/star.202200008

Crossref Full Text | Google Scholar

16. Zhang, B, Chen, L, Li, X, Li, L, and Zhang, H. Understanding the multi-scale structure and functional properties of starch modulated by glow-plasma: a structure-functionality relationship. Food Hydrocoll. (2015) 50:228–36. doi: 10.1016/j.foodhyd.2015.05.002

Crossref Full Text | Google Scholar

17. Lii, CY, Liao, C, Stobinski, L, and Tomasik, P. Exposure of granular starches to low-pressure glow ethylene plasma. Eur Polym J. (2002) 38:1601–6. doi: 10.1016/S0014-3057(02)00022-8

Crossref Full Text | Google Scholar

18. Punia, S, Sandhu, KS, Dhull, SB, and Kaur, M. Dynamic, shear, and pasting behavior of native and octenyl succinic anhydride (OSA) modified wheat starch and their utilization in preparation of edible films. Int J Biol Macromol. (2019) 133:110–6. doi: 10.1016/j.ijbiomac.2019.04.089

PubMed Abstract | Crossref Full Text | Google Scholar

19. Liu, W, and She, Q. Studies on the physicochemical properties of mung bean starch from sour liquid processing and centrifugation. J Food Eng. (2007) 79:358–63. doi: 10.1016/j.jfoodeng.2006.01.065

Crossref Full Text | Google Scholar

20. Sun, X, Saleh, ASM, Sun, Z, Ge, X, Shen, H, Zhang, Q, et al. Modification of multi-scale structure, physicochemical properties, and digestibility of rice starch via microwave and cold plasma treatments. LWT Food Sci Technol. (2022) 153:112483. doi: 10.1016/j.lwt.2021.112483

Crossref Full Text | Google Scholar

21. Ji, H, Yang, P, Zhang, L, Wang, X, Li, X, Ma, H, et al. Effects of inulin with short and long-chain on pasting, texture and rheological properties of sweet potato starch. CyTA J Food. (2021) 19:21–32. doi: 10.1080/19476337.2020.1852314

Crossref Full Text | Google Scholar

22. Guo, L, Li, JH, Yuan, YH, Gui, YF, Zou, FX, Lu, L, et al. Structural and functional modification of kudzu starch using α-amylase and transglucosidase. Int J Biol Macromol. (2021) 169:67–74. doi: 10.1016/j.ijbiomac.2020.12.099

PubMed Abstract | Crossref Full Text | Google Scholar

23. Zhang, L, Wang, X, Li, S, Sun, J, and Liu, X. Effect of inulin on the pasting, textural, and rheological properties of sweet potato starch. CyTA J Food. (2019) 17:733–43. doi: 10.1080/19476337.2019.1645738

Crossref Full Text | Google Scholar

24. Wu, TY, Chang, CR, Chang, TJ, Chang, YJ, Liew, Y, and Chau, CF. Changes in physicochemical properties of corn starch upon modififications by atmospheric pressure plasma jet. Food Chem. (2019) 283:46–51. doi: 10.1016/j.foodchem.2019.01.043

Crossref Full Text | Google Scholar

25. Yan, SL, Chen, GY, Hou, YJ, and Chen, Y. Improved solubility of banana starch by dielectric barrier discharge plasma treatment. Int J Food Sci Technol. (2019) 55:641–8. doi: 10.1111/ijfs.14318

Crossref Full Text | Google Scholar

26. Bie, P, Pu, H, Zhang, B, Su, J, Chen, L, and Li, X. Structural characteristics and rheological properties of plasma-treated starch. Innov Food Sci Emerg Tecnol. (2016) 34:196–204. doi: 10.1016/j.ifset.2015.11.019

Crossref Full Text | Google Scholar

27. Ge, XZ, Shen, HS, Su, CY, Zhang, B, Zhang, Q, Jiang, H, et al. The improving effects of cold plasma on multi-scale structure, physicochemical and digestive properties of dry heated red adzuki bean starch. Food Chem. (2021) 349:129159. doi: 10.1016/j.foodchem.2021.129159

PubMed Abstract | Crossref Full Text | Google Scholar

28. Gao, S, Liu, H, Sun, L, Liu, N, Wang, J, Huang, Y, et al. The effects of dielectric barrier discharge plasma on physicochemical and digestion properties of starch. Int J Biol Macromol. (2019) 138:819–30. doi: 10.1016/j.ijbiomac.2019.07.147

PubMed Abstract | Crossref Full Text | Google Scholar

29. Yan, Y, Feng, L, Shi, M, Cui, C, and Liu, Y. Effect of plasma-activated water on the structure and in vitro digestibility of waxy and normal maize starches during heat moisture treatment. Food Chem. (2020) 306:125589. doi: 10.1016/j.foodchem.2019.125589

PubMed Abstract | Crossref Full Text | Google Scholar

30. Devi, E, Kalaivendan, RGT, Eazhumalai, G, and Annapure, US. Impact of atmospheric pressure pin-to-plate cold plasma on the functionality of arrowroot starch. J Agric Food R. (2023) 12:100567. doi: 10.1016/j.jafr.2023.100567

Crossref Full Text | Google Scholar

31. Shen, H, Ge, X, Zhang, Q, Zhang, X, Lu, Y, Jiang, H, et al. Dielectric barrier discharge plasma improved the fine structure, physicochemical properties, and digestibility of α-amylase enzymatic wheat starch. Innov Food Sci Emerg Tecnol. (2022) 78:102991. doi: 10.1016/j.ifset.2022.102991

Crossref Full Text | Google Scholar

32. Kou, X, Luo, D, Li, Y, Xu, B, Zhang, K, Li, P, et al. Effect of inulin with different degree of polymerization on textural and rheological properties of wheat starch-effect of inulin on gel properties of starch. Int J Food Sci Technol. (2018) 53:2576–85. doi: 10.1111/ijfs.13852

Crossref Full Text | Google Scholar

33. Liu, J, Wen, L, Zhang, X, Li, M, Liu, D, Shou, L, et al. Study on starch structure and physicochemical quality of waxy wheat. J Nucl Agric Sci. (2023) 37:2019–27. doi: 10.11869/j.issn.1000-8551.2023.10.2019

Crossref Full Text | Google Scholar

34. He, H, Bian, H, Xie, F, and Chen, L. Different effects of pectin and κ-carrageenan on the multiscale structures and in vitro digestibility of extruded rice starch. Food Hydrocoll. (2021) 111:106216. doi: 10.1016/j.foodhyd.2020.106216

Crossref Full Text | Google Scholar

35. Li, R, Li, X, Tu, A, Jing, C, Sun, W, Dong, S, et al. Effects of dielectric barrier discharge plasma treatment on the structure and functional properties of maize starch. J Food Saf Qual. (2022) 58:4009–21. doi: 10.1111/ijfs.16202

Crossref Full Text | Google Scholar

36. Guo, Z, Gou, Q, Yang, L, Yu, Q, and Han, L. Dielectric barrier discharge plasma: a green method to change structure of potato starch and improve physicochemical properties of potato starch films. Food Chem. (2022) 370:130992. doi: 10.1016/j.foodchem.2021.130992

PubMed Abstract | Crossref Full Text | Google Scholar

37. Thirumdas, R, Trimukhe, A, Deshmukh, RR, and Annapure, US. Functional and rheological properties of cold plasma treated rice starch. Carbohydr Polym. (2017) 157:1723–31. doi: 10.1016/j.carbpol.2016.11.050

PubMed Abstract | Crossref Full Text | Google Scholar

38. Zhu, F. Plasma modification of starch. Food Chem. (2017) 232:476–86. doi: 10.1016/j.foodchem.2017.04.024

Crossref Full Text | Google Scholar

39. Sudheesh, C, Sunooj, KV, Sinha, SK, George, J, Kumar, S, Murugesan, P, et al. Impact of energetic neutral nitrogen atoms created by glow discharge air plasma on the physico-chemical and rheological properties of kithul starch. Food Chem. (2019) 294:194–202. doi: 10.1016/j.foodchem.2019.05.067

PubMed Abstract | Crossref Full Text | Google Scholar

40. Sifuentes-Nieves, I, Mendez-Montealvo, G, Flores-Silva, PC, Nieto-Perez, M, Neira-Velazquez, G, Rodriguez-Fernandez, O, et al. Dielectric barrier discharge and radio-frequency plasma effect on structural properties of starches with different amylose content. Innov Food Sci Emerg Tecnol. (2021) 68:102630. doi: 10.1016/j.ifset.2021.102630

Crossref Full Text | Google Scholar

41. Thirumdas, R, Deshmukh, RR, and Annapure, US. Effect of low temperature plasma processing on physicochemical properties and cooking quality of basmati rice. Innov Food Sci Emerg Tecnol. (2015) 31:83–90. doi: 10.1016/j.ifset.2015.08.003

Crossref Full Text | Google Scholar

42. Okyere, AY, Boakye, PG, Bertoft, E, and Annor, GA. Temperature of plasma-activated water and its effect on the thermal and chemical surface properties of cereal and tuber starches. Curr R Food Sci. (2022) 5:1668–75. doi: 10.1016/j.crfs.2022.09.020

PubMed Abstract | Crossref Full Text | Google Scholar