Chutipaijit, Sutee

Preferred name

Chutipaijit, Sutee

Alternative Name

Chutipaijit, S.

Main Affiliation

Integrated Innovative Technology

sutee.ch@kmitl.ac.th

Now showing 1 - 10 of 13

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In vitro plant growth promotion by ZnO nanomaterials in indica rice seedlings (Oryza sativa L.)
(2018-01-01)
Chutipaijit, Sutee
;
Whalley, Anthony J.S.
;
Sutjaritvorakul, Thanawat
This research focuses on zinc oxide nanomaterials (nano-ZnO) applied to agricultural fields. Plants were exposed to nanomaterials and responded differently in tolerance to the various concentrations and types of nanomaterials. Two cultivars (SP1 and SP90) of indica rice (Oryza sativa L.) seedlings were grown at 0-1,000 mg.L-1 nano-ZnO and their morphological and physiological response was determined. Rice seedlings were harvested 5, 7, 10 and 14 days after treatments. Results demonstrated a significant increase in biomass, growth tolerance index (GTI), chlorophyll contents and antioxidant enzyme activities of the treated plant at 100 mg.L-1 nano-ZnO but these parameters decreased with increasing nano-ZnO concentration in the treated plants at 300-1,000 mg.L-1 nano-ZnO when compared to control plants (0 mg.L-1 nano-ZnO). The high accumulations of biomass, GTI and chlorophyll contents were related to production of antioxidant enzyme activities (catalase and peroxidase) in plant cells when plants were exposed to a low dose of nano-ZnO. Further investigations will determine the effect of nano-ZnO on the plant productivity.
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Biological synthesis and characterization of lead oxide nanoparticles using Averrhoa bilimbi Linn. aqueous extract
(2020-10-26)
Sutjaritvorakul, Thanawat
;
Chutipaijit, Sutee
Lead oxide (PbO) is an important semiconductor material, and it can be potentially applied in many industries such as glass, battery and electronic industry. Metal nanoparticles are commonly synthesized by chemical and physical methods. However, these methods require extreme conditions, and thus causing toxic compounds. To overcome these problems, biological method for synthesis has been developed because it is more environmentally-friendly process. The objective of this research was to synthesize and characterize PbO nanoparticles (PbO-NPs) using aqueous fruit extract of Averrhoa bilimbi Linn. The metal nanoparticles were investigated for the morphological characteristics and chemical composition by scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), and were identified by X-ray powder diffraction (XRD) and Fourier transform infrared (FTIR). The XRD pattern and FTIR spectrum substantiated that the metal nanoparticles were lead oxide. It was found that the aqueous fruit extract of A. bilimbi can synthesized PbO-NPs. Therefore, this method can be a promising alternative for low cost and non-polluting production of PbO-NPs.
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Growth Responses and Regression Analysis of Zinc Oxide Nanoparticles in Indica Rice (Oryza sativa L.)
(2022-01-01)
Sutjaritvorakul, Thanawat
;
Koomsubsiri, Amorn
;
Sridam, Idhisak
;
Meksiriporn, Bunyarit
;
Chutipaijit, Sutee
The use of metal nanomaterials to promote plant growth and inhibit plant pathogenic microorganisms is gaining interest. In this study, zinc oxide nanoparticles (ZnONPs) were evaluated for effects on growth and productivity of indica rice plants (Oryza sativa L.). The rice plant was exposed to ZnONPs with different concentrations i. e. 0, 200, 600 and 800 mg/l. The plant height, weight and the number of panicles per clump were investigated. The result showed that 200 mg/l of ZnONPs induced the highest enhancement of plant height, weight and the number of panicles per clump with a significant difference compared to other groups. The mathematical model of the height, weight and the number of panicles per clump was analyzed by linear regression, and the determination coefficient (R2) of the linear regression model was 0.86, 0.84 and 0.52, respectively. This linear regression model could be potentially extended to the indica rice plant cultivation process in practical applications to predict the rice plant growth and productivity in commercial cultivation.
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Application of nanomaterials in plant regeneration of rice (Oryza sativa L.)
(2017-01-01)
Chutipaijit, Sutee
;
Sutjaritvorakul, Thanawat
In recent years, the application of nanomaterials has been investigated by various studies, especially in their biological and agricultural features. This research aimed to evaluate the influence of zinc oxide (ZnO) and titanium dioxide (TiO<inf>2</inf>) nanoparticles on the quality of the plant regeneration in rice (Oryza sativa L. cv. RD49). Mature seed explants were used for callus induction and plant regeneration cultured on the medium supplemented with different concentrations of ZnO or TiO<inf>2</inf> nanoparticles. The high percentage of the callus induction was achieved on the medium supplemented with 5 mg.L-1 ZnO nanoparticles or 20 mg.L-1 TiO<inf>2</inf> nanoparticles when compared with control treatment (without nanoparticles). Various concentrations of TiO<inf>2</inf> nanoparticles were also found to increase the percentage of the plant regeneration more than ZnO nanoparticles. The highest percentage of plant regeneration was observed on the medium containing the concentration of 20 mg.L-1 TiO<inf>2</inf> nanoparticles. The in vitro rooting of regenerated shoots was hardened and successfully transplanted to the field after 30 days of transplantation. The results suggested that ZnO and TiO<inf>2</inf> nanomaterials may have potential applications in the in vitro plant regeneration.
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Enzymatic degradation of modified gelatin and carboxymethyl cellulose scaffolds
(2018-01-01)
Sutjaritvorakul, Thanawat
;
Wiwatwongwana, Fasai
;
Imsuwan, Pattareewan
;
Whalley, Anthony J.S.
;
Chutipaijit, Sutee
The modification of biological and synthetic biopolymer provides suitable properties for bone and tissue engineering. Modified gelatin and carboxymethyl cellulose (CMC) scaffolds are interesting biomaterials for applying as artificial dermal skin. The objective of this research was to investigate the enzymatic degradation of gelatin and carboxymethyl cellulose scaffolds. The samples were prepared in different compositions of gelatin and CMC (Gelatin:CMC) (w/w) such as 9:1, 8:2, 7:3 and 6:4. The enzymatic degradation test was undertaken using cellulase produced by Aspergillus niger. The results demonstrated that GC64 (Gelatin:CMC, 6:4) exhibited the highest degree of enzymatic degradation and the behavior of the degradation was predicated based on water absorption ability. Moreover, the morphology of degraded residues were investigated by scanning electron microscopy (SEM).
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Application of activated charcoal and nanocarbon to callus induction and plant regeneration in aromatic rice (Oryza sativa L.)
(2018-01-01)
Chutipaijit, Sutee
;
Sutjaritvorakul, Thanawat
The investigations of nanotechnology with the application on agricultural products also have been few reported, especially the plant regeneration. The effects of activated charcoal and nanocarbon on the callus induction and plant regeneration of aromatic rice were studied. Activated charcoal was added into the callus induction and regeneration medium. The presence of activated charcoal in the callus induction medium (100-500 mg L−1), activated charcoal significantly reduced the percentage of the callus induction and biomass accumulation (fresh weight, dry weight and size). Whereas, the regeneration medium supplemented with 100 mg L−1 of activated charcoal showed the highest percentage of plant regeneration (61.90%) and the ratio of the number of seedlings to the number of regenerated calli (RSR; 3.06) that derived from the callus induction medium (without activated charcoal). Moreover, the induced calli derived from the callus induction medium supplemented with nanocarbon at 5 mg L−1 showed the highest percentage of callus induction (94.70%), the percentage of green spots (95.83%), the percentage of plant regeneration (60.42%) and the RSR (3.12) when transferred the calli into the regeneration medium (without nanocarbon). After that, nanocarbon was also added into the regeneration medium. The percentage of green spots (96.08%), the percentage of plant regeneration (62.75%) and the RSR (3.16) obtained from the regeneration medium supplemented with 20 mg L−1 of nanocarbon showed the highest values. This experiment showed that the optimum concentration of activated charcoal and nanocarbon had potential to enhance the callus induction and plant regeneration frequencies in tissue culture medium of aromatic rice.
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Fungal Transformation and Oxalate-Mediated Mineralization of Heavy Metal Oxides by Aspergillus aculeatus
(2026-04-01)
Sawangchart, Thanakorn
;
Chutipaijit, Sutee
;
Meksiriporn, Bunyarit
;
Narueban, Worapat
;
Tilokkarn, Worrathon
Fungal transformation is increasingly recognized as an important process influencing metal solubilization and immobilization in soil environments. In this study, a fungal strain (PTW4) isolated from mining-contaminated soil was molecularly identified as Aspergillus aculeatus. The strain was evaluated for its ability to solubilize and transform several heavy metal oxides, including ZnO, Pb<inf>3</inf>O<inf>4</inf>, Cu<inf>2</inf>O, and MoO<inf>3</inf>. PTW4 produced consistent halo formation across all tested oxides, accompanied by progressive acidification of the culture medium, suggesting organic acid-mediated solubilization. Characterization of extracellular precipitates by SEM-EDS and XRD indicated mineral phases consistent with oxalate-associated biominerals, including zinc oxalate dihydrate (ZnC<inf>2</inf>O<inf>4</inf>·2H<inf>2</inf>O), lead oxalate (PbC<inf>2</inf>O<inf>4</inf>), and copper oxalate hydrate (CuC<inf>2</inf>O<inf>4</inf>·xH<inf>2</inf>O). These minerals represent low-solubility phases that may reduce metal mobility in the surrounding environment. In contrast, molybdenum did not precipitate under the experimental conditions, suggesting metal-specific constraints in fungal biomineralization processes. Although organic acid production was not directly quantified, identification of oxalate mineral phases supports an oxalate-associated mineralization mechanism. Overall, the results provide evidence for heavy metal solubilization and selective extracellular precipitation consistent with oxalate biomineral formation by A. aculeatus PTW4, highlighting its potential relevance to fungal-mediated bioremediation and selective bioleaching processes.
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ZNO AND TIO2 nanoparticles stimulate callus induction and secondary metabolite production in indica RICE
(2020-01-01)
Chutipaijit, Sutee
;
Sutjaritvorakul, Thanawat
Metal nanoparticles are widely used in various fields of industry and their impact in the agricultural field is increasing. This research was carried out to investigate the effects of ZnO and TiO<inf>2</inf> nanoparticles on callus induction and plant metabolism in indica rice. Indica rice was assessed in plant tissue culture condition to estimate the influence of metal nanoparticles on morphological and physiological factors over 4 weeks. The seeds of Oryza sativa L. var. KDML105 were exposed to 1-3 mg L-1 of 2,4-dichlorophenoxyacetic acid (2,4-D) in the callus induction medium. The induced-calli were cultured on the callus induction medium supplemented with 2 mg L-1 of 2,4-D and showed a high increase in size and dry weight contents under the light condition when compared with the control and other treatments. Moreover, this research also investigated the potential impacts of ZnO and TiO<inf>2</inf> nanoparticles at 200, 400 and 800 mg L-1 on morphological and metabolic responses of the induced-calli cultured on the callus induction medium supplemented with 2,4-D and each type of metal nanoparticles. At 4 weeks after treatment, the induced-calli were analyzed for plant growth and assays on aspects of their metabolism were undertaken. The induced-calli exposed to 200 mg L-1 of ZnO or TiO<inf>2</inf> nanoparticles were found to have significant increase of biomass (size and dry weight of callus), total phenolic compounds and total flavonoid contents in KDML105 variety. The results demonstrated that utilization of ZnO and TiO<inf>2</inf> nanoparticles at appropriate concentration could positively induce the production of beneficial secondary metabolites in the induced-calli of indica rice and are worthy of further study for applications in other plant species.
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Biogenic synthesis and antibacterial activity of silver nanoparticles (AgNPs) produced by Phomopsis sp. strain GFPA2
(2018-01-01)
Sutjaritvorakul, Thanawat
;
Chutipaijit, Sutee
Silver nanoparticles (AgNPs) have many applications in different fields such as electronic industries, chemical industries, medical diagnostics and detergent products. In this research AgNPs were produced by Phomopsis sp. GFPA2 isolated from zinc mineral rocks, and were successfully synthesized by using fungal culture broth. The biogenic crystals were investigated and identified by field emission scanning electron microscopy (FE-SEM) equipped with energy dispersive X-ray spectroscopy (EDS) and X-ray powder diffraction (XRD). The spectra confirmed that the biogenic crystals were AgNPs, and they are mostly spherical in shape. The crystals were also tested for their antibacterial activity against human pathogenic bacteria such as Escherichia coli ATCC 27853, Pseudomonas aerogenosa ATCC 27853, Bacillus cereus ATCC 6633 and Staphylococcus aureus ATCC 25623. The result showed that the biogenic AgNPs can inhibit the growth of both Gram positive and Gram negative pathogenic bacteria. Therefore, these biogenic AgNPs could be used to treat the infection caused by human pathogenic bacteria.
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Comparative study of total phenolic compounds, flavonoids and antioxidant capacities in pigmented and non-pigmented rice of indica rice varieties
(2018-06-01)
Chutipaijit, Sutee
;
Sutjaritvorakul, Thanawat
The total phenolic compounds and flavonoid contents of grains as well as the antioxidant capacities were determined in 15 rice varieties. A high-performance liquid chromatography method was modified for the determination of the flavonoid subgroups in rice grains. The results showed the total phenolic compounds, flavonoid contents, and antioxidant capacities of pigmented rice were higher than in non-pigmented rice. The amounts of flavanone groups ranging from 0.04 to 0.40 mg Naringenin g−1, while flavones groups ranging from 0.08 to 0.57 mg Apigenin g−1, flavonol groups ranging from 0.16 to 1.20 mg Quercetin g−1 and anthocyanin groups ranging from 44.43 to 69.83 mg Cyanidin chloride g−1 were found in pigmented rice. The total phenolic compounds and total flavonoid contents of grains were significantly correlated with their antioxidant capacities. The results indicated that pigmented rice appeared as a good source of phenolic and flavonoid compounds and had beneficial nutritive values or antioxidant substances.

Chutipaijit, Sutee

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